No sleep mode on my devices and my real experience with ESP8266 / ESP32, not theory.
Code: Select all
D:\rhs\ESP32\Frequency\Frequency.ino:151:3: error: 'gpio_pad_select_gpio' was not declared in this scope; did you mean 'esp_rom_gpio_pad_select_gpio'?
151 | gpio_pad_select_gpio(OUTPUT_CONTROL_GPIO); // Set GPIO pad
| ^~~~~~~~~~~~~~~~~~~~
| esp_rom_gpio_pad_select_gpio
D:\rhs\ESP32\Frequency\Frequency.ino:159:3: error: 'gpio_matrix_in' was not declared in this scope
159 | gpio_matrix_in(PCNT_INPUT_SIG_IO, SIG_IN_FUNC226_IDX, false); // Set GPIO matrin IN - Freq Meter input
| ^~~~~~~~~~~~~~
D:\rhs\ESP32\Frequency\Frequency.ino:160:3: error: 'gpio_matrix_out' was not declared in this scope; did you mean 'gpio_iomux_out'?
160 | gpio_matrix_out(IN_BOARD_LED, SIG_IN_FUNC226_IDX, false, false); // Set GPIO matrix OUT - to inboard LED
| ^~~~~~~~~~~~~~~Hello Sir.jgustavoam wrote: ↑Tue Jun 04, 2024 8:55 pmHi Araquel,
The code created by the topic is for Arduino. Please inform which IDF code you are using.
It's this one? Arduino Release v3.0.0 based on ESP-IDF v5.1.4 (latest)?
Please report the error message.
If you want to test compiling with the ESP32 IDF, try this:
https://github.com/Gustavomurta/ESP32_f ... 2freqMeter
Code: Select all
In file included from C:\Users\woodl\AppData\Local\Arduino15\packages\esp32\tools\esp32-arduino-libs\idf-release_v5.1-bd2b9390ef\esp32/include/xtensa/include/xt_utils.h:16,
from C:\Users\woodl\AppData\Local\Arduino15\packages\esp32\tools\esp32-arduino-libs\idf-release_v5.1-bd2b9390ef\esp32/include/esp_hw_support/include/esp_cpu.h:16,
from C:\Users\woodl\AppData\Local\Arduino15\packages\esp32\tools\esp32-arduino-libs\idf-release_v5.1-bd2b9390ef\esp32/include/esp_hw_support/include/spinlock.h:11,
from C:\Users\woodl\AppData\Local\Arduino15\packages\esp32\tools\esp32-arduino-libs\idf-release_v5.1-bd2b9390ef\esp32/include/freertos/FreeRTOS-Kernel/portable/xtensa/include/freertos/portmacro.h:74,
from C:\Users\woodl\AppData\Local\Arduino15\packages\esp32\tools\esp32-arduino-libs\idf-release_v5.1-bd2b9390ef\esp32/include/freertos/FreeRTOS-Kernel/include/freertos/portable.h:59,
from C:\Users\woodl\AppData\Local\Arduino15\packages\esp32\tools\esp32-arduino-libs\idf-release_v5.1-bd2b9390ef\esp32/include/freertos/FreeRTOS-Kernel/include/freertos/FreeRTOS.h:71,
from C:\Users\woodl\AppData\Local\Arduino15\packages\esp32\hardware\esp32\3.0.2\cores\esp32/Arduino.h:33,
from C:\Users\woodl\AppData\Local\Temp\arduino\sketches\6EF41278B30E93579C9865EAA3D2B7AE\sketch\brazil_freq.ino.cpp:1:
C:\Users\woodl\Documents\Arduino\brazil_freq\brazil_freq.ino: In function 'void pcnt_intr_handler(void*)':
C:\Users\woodl\Documents\Arduino\brazil_freq\brazil_freq.ino:28:31: error: 'PCNT_UNIT_0' was not declared in this scope
28 | #define PCNT_COUNT_UNIT PCNT_UNIT_0 // Set Pulse Counter Unit - 0
| ^~~~~~~~~~~
C:\Users\woodl\AppData\Local\Arduino15\packages\esp32\tools\esp32-arduino-libs\idf-release_v5.1-bd2b9390ef\esp32/include/esp_common/include/esp_bit_defs.h:79:42: note: in definition of macro 'BIT'
79 | #define BIT(nr) (1UL << (nr))
| ^~
C:\Users\woodl\Documents\Arduino\brazil_freq\brazil_freq.ino:107:26: note: in expansion of macro 'PCNT_COUNT_UNIT'
107 | PCNT.int_clr.val = BIT(PCNT_COUNT_UNIT); // Clear Pulse Counter interrupt bit
| ^~~~~~~~~~~~~~~
C:\Users\woodl\Documents\Arduino\brazil_freq\brazil_freq.ino: In function 'void init_PCNT()':
C:\Users\woodl\Documents\Arduino\brazil_freq\brazil_freq.ino:114:3: error: 'pcnt_config_t' was not declared in this scope; did you mean 'uart_config_t'?
114 | pcnt_config_t pcnt_config = { }; // PCNT unit instance
| ^~~~~~~~~~~~~
| uart_config_t
C:\Users\woodl\Documents\Arduino\brazil_freq\brazil_freq.ino:116:3: error: 'pcnt_config' was not declared in this scope
116 | pcnt_config.pulse_gpio_num = PCNT_INPUT_SIG_IO; // Pulse input GPIO 34 - Freq Meter Input
| ^~~~~~~~~~~
C:\Users\woodl\Documents\Arduino\brazil_freq\brazil_freq.ino:28:31: error: 'PCNT_UNIT_0' was not declared in this scope
28 | #define PCNT_COUNT_UNIT PCNT_UNIT_0 // Set Pulse Counter Unit - 0
| ^~~~~~~~~~~
C:\Users\woodl\Documents\Arduino\brazil_freq\brazil_freq.ino:118:22: note: in expansion of macro 'PCNT_COUNT_UNIT'
118 | pcnt_config.unit = PCNT_COUNT_UNIT; // Unidade de contagem PCNT - 0
| ^~~~~~~~~~~~~~~
C:\Users\woodl\Documents\Arduino\brazil_freq\brazil_freq.ino:29:31: error: 'PCNT_CHANNEL_0' was not declared in this scope; did you mean 'LEDC_CHANNEL_0'?
29 | #define PCNT_COUNT_CHANNEL PCNT_CHANNEL_0 // Set Pulse Counter channel - 0
| ^~~~~~~~~~~~~~
C:\Users\woodl\Documents\Arduino\brazil_freq\brazil_freq.ino:119:25: note: in expansion of macro 'PCNT_COUNT_CHANNEL'
119 | pcnt_config.channel = PCNT_COUNT_CHANNEL; // PCNT unit number - 0
| ^~~~~~~~~~~~~~~~~~
C:\Users\woodl\Documents\Arduino\brazil_freq\brazil_freq.ino:121:26: error: 'PCNT_COUNT_INC' was not declared in this scope; did you mean 'PCNT_COUNT_UNIT'?
121 | pcnt_config.pos_mode = PCNT_COUNT_INC; // PCNT positive edge count mode - inc
| ^~~~~~~~~~~~~~
| PCNT_COUNT_UNIT
C:\Users\woodl\Documents\Arduino\brazil_freq\brazil_freq.ino:123:28: error: 'PCNT_MODE_DISABLE' was not declared in this scope; did you mean 'GPIO_MODE_DISABLE'?
123 | pcnt_config.lctrl_mode = PCNT_MODE_DISABLE; // PCNT low control mode - disable
| ^~~~~~~~~~~~~~~~~
| GPIO_MODE_DISABLE
C:\Users\woodl\Documents\Arduino\brazil_freq\brazil_freq.ino:124:28: error: 'PCNT_MODE_KEEP' was not declared in this scope
124 | pcnt_config.hctrl_mode = PCNT_MODE_KEEP; // PCNT high control mode - won't change counter mode
| ^~~~~~~~~~~~~~
C:\Users\woodl\Documents\Arduino\brazil_freq\brazil_freq.ino:125:3: error: 'pcnt_unit_config' was not declared in this scope; did you mean 'pcnt_unit_config_t'?
125 | pcnt_unit_config(&pcnt_config); // Initialize PCNT unit
| ^~~~~~~~~~~~~~~~
| pcnt_unit_config_t
C:\Users\woodl\Documents\Arduino\brazil_freq\brazil_freq.ino:127:3: error: 'pcnt_counter_pause' was not declared in this scope
127 | pcnt_counter_pause(PCNT_COUNT_UNIT); // Pause PCNT unit
| ^~~~~~~~~~~~~~~~~~
C:\Users\woodl\Documents\Arduino\brazil_freq\brazil_freq.ino:128:3: error: 'pcnt_counter_clear' was not declared in this scope
128 | pcnt_counter_clear(PCNT_COUNT_UNIT); // Clear PCNT unit
| ^~~~~~~~~~~~~~~~~~
C:\Users\woodl\Documents\Arduino\brazil_freq\brazil_freq.ino:130:38: error: 'PCNT_EVT_H_LIM' was not declared in this scope
130 | pcnt_event_enable(PCNT_COUNT_UNIT, PCNT_EVT_H_LIM); // Enable event to watch - max count
| ^~~~~~~~~~~~~~
C:\Users\woodl\Documents\Arduino\brazil_freq\brazil_freq.ino:130:3: error: 'pcnt_event_enable' was not declared in this scope; did you mean 'pcnt_unit_enable'?
130 | pcnt_event_enable(PCNT_COUNT_UNIT, PCNT_EVT_H_LIM); // Enable event to watch - max count
| ^~~~~~~~~~~~~~~~~
| pcnt_unit_enable
C:\Users\woodl\Documents\Arduino\brazil_freq\brazil_freq.ino:131:3: error: 'pcnt_isr_register' was not declared in this scope; did you mean 'ledc_isr_register'?
131 | pcnt_isr_register(pcnt_intr_handler, NULL, 0, NULL); // Setup Register ISR handler
| ^~~~~~~~~~~~~~~~~
| ledc_isr_register
C:\Users\woodl\Documents\Arduino\brazil_freq\brazil_freq.ino:132:3: error: 'pcnt_intr_enable' was not declared in this scope; did you mean 'pcnt_unit_enable'?
132 | pcnt_intr_enable(PCNT_COUNT_UNIT); // Enable interrupts for PCNT unit
| ^~~~~~~~~~~~~~~~
| pcnt_unit_enable
C:\Users\woodl\Documents\Arduino\brazil_freq\brazil_freq.ino:134:3: error: 'pcnt_counter_resume' was not declared in this scope
134 | pcnt_counter_resume(PCNT_COUNT_UNIT); // Resume PCNT unit - starts count
| ^~~~~~~~~~~~~~~~~~~
C:\Users\woodl\Documents\Arduino\brazil_freq\brazil_freq.ino: In function 'void read_PCNT(void*)':
C:\Users\woodl\Documents\Arduino\brazil_freq\brazil_freq.ino:28:31: error: 'PCNT_UNIT_0' was not declared in this scope
28 | #define PCNT_COUNT_UNIT PCNT_UNIT_0 // Set Pulse Counter Unit - 0
| ^~~~~~~~~~~
C:\Users\woodl\Documents\Arduino\brazil_freq\brazil_freq.ino:141:26: note: in expansion of macro 'PCNT_COUNT_UNIT'
141 | pcnt_get_counter_value(PCNT_COUNT_UNIT, &pulses); // Read Pulse Counter value
| ^~~~~~~~~~~~~~~
C:\Users\woodl\Documents\Arduino\brazil_freq\brazil_freq.ino:141:3: error: 'pcnt_get_counter_value' was not declared in this scope
141 | pcnt_get_counter_value(PCNT_COUNT_UNIT, &pulses); // Read Pulse Counter value
| ^~~~~~~~~~~~~~~~~~~~~~
C:\Users\woodl\Documents\Arduino\brazil_freq\brazil_freq.ino: In function 'void init_frequencyMeter()':
C:\Users\woodl\Documents\Arduino\brazil_freq\brazil_freq.ino:151:3: error: 'gpio_pad_select_gpio' was not declared in this scope; did you mean 'esp_rom_gpio_pad_select_gpio'?
151 | gpio_pad_select_gpio(OUTPUT_CONTROL_GPIO); // Set GPIO pad
| ^~~~~~~~~~~~~~~~~~~~
| esp_rom_gpio_pad_select_gpio
C:\Users\woodl\Documents\Arduino\brazil_freq\brazil_freq.ino:159:3: error: 'gpio_matrix_in' was not declared in this scope
159 | gpio_matrix_in(PCNT_INPUT_SIG_IO, SIG_IN_FUNC226_IDX, false); // Set GPIO matrin IN - Freq Meter input
| ^~~~~~~~~~~~~~
C:\Users\woodl\Documents\Arduino\brazil_freq\brazil_freq.ino:160:3: error: 'gpio_matrix_out' was not declared in this scope; did you mean 'gpio_iomux_out'?
160 | gpio_matrix_out(IN_BOARD_LED, SIG_IN_FUNC226_IDX, false, false); // Set GPIO matrix OUT - to inboard LED
| ^~~~~~~~~~~~~~~
| gpio_iomux_out
C:\Users\woodl\Documents\Arduino\brazil_freq\brazil_freq.ino: In function 'void loop()':
C:\Users\woodl\Documents\Arduino\brazil_freq\brazil_freq.ino:28:31: error: 'PCNT_UNIT_0' was not declared in this scope
28 | #define PCNT_COUNT_UNIT PCNT_UNIT_0 // Set Pulse Counter Unit - 0
| ^~~~~~~~~~~
C:\Users\woodl\Documents\Arduino\brazil_freq\brazil_freq.ino:213:24: note: in expansion of macro 'PCNT_COUNT_UNIT'
213 | pcnt_counter_clear(PCNT_COUNT_UNIT); // Clear Pulse Counter
| ^~~~~~~~~~~~~~~
C:\Users\woodl\Documents\Arduino\brazil_freq\brazil_freq.ino:213:5: error: 'pcnt_counter_clear' was not declared in this scope
213 | pcnt_counter_clear(PCNT_COUNT_UNIT); // Clear Pulse Counter
| ^~~~~~~~~~~~~~~~~~
exit status 1
Compilation error: 'PCNT_UNIT_0' was not declared in this scope
Code: Select all
// ESP32 Frequency Meter
// ESP32 DevKit 38 pins + I2C PCF8574 LCD
// Arduino IDE 2.3.2 / ESP32 Arduino V 3.0.2
// Gustavo Murta e Rui Viana august/2020 - updated 2024/07/19
// https://blog.eletrogate.com/esp32-frequencimetro-de-precisao
// https://www.esp32.com/viewtopic.php?f=19&t=17018
// LCD I2C SDA - GPIO_21
// LCD I2C SCL - GPIO_22
#include "stdio.h" // Library STDIO
#include "driver/ledc.h" // Library ESP32 LEDC
#include "driver/pcnt.h" // Library ESP32 PCNT
#include "soc/pcnt_struct.h" // Library ESP32 PCNT
#include "esp32/rom/gpio.h" // Library ESP32 GPIO
#include <LCD-I2C.h> // Library LCD with PCF8574
LCD_I2C lcd(0x3F, 16, 2); // Instance LCD I2C - address x3F
#define PCNT_COUNT_UNIT PCNT_UNIT_0 // Set Pulse Counter Unit - 0
#define PCNT_COUNT_CHANNEL PCNT_CHANNEL_0 // Set Pulse Counter channel - 0
#define PCNT_INPUT_SIG_IO GPIO_NUM_34 // Set Pulse Counter input - Freq Meter Input GPIO 34
#define LEDC_HS_CH0_GPIO GPIO_NUM_33 // LEDC output - pulse generator - GPIO_33
#define PCNT_INPUT_CTRL_IO GPIO_NUM_35 // Set Pulse Counter Control GPIO pin - HIGH = count up, LOW = count down
#define OUTPUT_CONTROL_GPIO GPIO_NUM_32 // Timer output control port - GPIO_32
#define PCNT_H_LIM_VAL overflow // Overflow of Pulse Counter
#define IN_BOARD_LED GPIO_NUM_2 // ESP32 native LED - GPIO 2
bool flag = true; // Flag to enable print frequency reading
uint32_t overflow = 20000; // Max Pulse Counter value 20000
int16_t pulses = 0; // Pulse Counter value
uint32_t multPulses = 0; // Number of PCNT counter overflows
uint32_t sample_time = 1000000; // Sample time of 1 second to count pulses (change the value to calibrate frequency meter)
uint32_t osc_freq = 16000; // Oscillator frequency - initial 16000 Hz (may be 1 Hz to 40 MHz)
uint32_t mDuty = 0; // Duty value
uint32_t resolution = 0; // Resolution value of Oscillator
float frequency = 0; // frequency value
char buf[32]; // Buffer
esp_timer_create_args_t create_args; // Create an esp_timer instance
esp_timer_handle_t timer_handle; // Create an single timer
portMUX_TYPE timerMux = portMUX_INITIALIZER_UNLOCKED; // portMUX_TYPE to do synchronism
//----------------------------------------------------------------------------------------
void setup() {
Serial.begin(115200); // Serial Console Arduino 115200 Bps
Serial.println(" Input the Frequency - 1 to 40 MHz"); // Console print
lcd.begin();
lcd.display();
lcd.backlight();
lcd.print(" Frequency:"); // LCD print
init_frequencyMeter(); // Initialize Frequency Meter
}
//----------------------------------------------------------------------------
void init_osc_freq() // Initialize Oscillator to test Freq Meter
{
resolution = (log(80000000 / osc_freq) / log(2)) / 2; // Calc of resolution of Oscillator
if (resolution < 1) resolution = 1; // set min resolution
Serial.println(resolution); // Print
mDuty = (pow(2, resolution)) / 2; // Calc of Duty Cycle 50% of the pulse
Serial.println(mDuty); // Print
ledc_timer_config_t ledc_timer = {}; // LEDC timer config instance
ledc_timer.duty_resolution = ledc_timer_bit_t(resolution); // Set resolution
ledc_timer.freq_hz = osc_freq; // Set Oscillator frequency
ledc_timer.speed_mode = LEDC_HIGH_SPEED_MODE; // Set high speed mode
ledc_timer.timer_num = LEDC_TIMER_0; // Set LEDC timer index - 0
ledc_timer_config(&ledc_timer); // Set LEDC Timer config
ledc_channel_config_t ledc_channel = {}; // LEDC Channel config instance
ledc_channel.channel = LEDC_CHANNEL_0; // Set HS Channel - 0
ledc_channel.duty = mDuty; // Set Duty Cycle 50%
ledc_channel.gpio_num = LEDC_HS_CH0_GPIO; // LEDC Oscillator output GPIO 33
ledc_channel.intr_type = LEDC_INTR_DISABLE; // LEDC Fade interrupt disable
ledc_channel.speed_mode = LEDC_HIGH_SPEED_MODE; // Set LEDC high speed mode
ledc_channel.timer_sel = LEDC_TIMER_0; // Set timer source of channel - 0
ledc_channel_config(&ledc_channel); // Config LEDC channel
}
//----------------------------------------------------------------------------------
static void IRAM_ATTR pcnt_intr_handler(void *arg) // Counting overflow pulses
{
portENTER_CRITICAL_ISR(&timerMux); // disabling the interrupts
multPulses++; // increment Overflow counter
PCNT.int_clr.val = BIT(PCNT_COUNT_UNIT); // Clear Pulse Counter interrupt bit
portEXIT_CRITICAL_ISR(&timerMux); // enabling the interrupts
}
//----------------------------------------------------------------------------------
void init_PCNT(void) // Initialize and run PCNT unit
{
pcnt_config_t pcnt_config = {}; // PCNT unit instance
pcnt_config.pulse_gpio_num = PCNT_INPUT_SIG_IO; // Pulse input GPIO 34 - Freq Meter Input
pcnt_config.ctrl_gpio_num = PCNT_INPUT_CTRL_IO; // Control signal input GPIO 35
pcnt_config.unit = PCNT_COUNT_UNIT; // Unidade de contagem PCNT - 0
pcnt_config.channel = PCNT_COUNT_CHANNEL; // PCNT unit number - 0
pcnt_config.counter_h_lim = PCNT_H_LIM_VAL; // Maximum counter value - 20000
pcnt_config.pos_mode = PCNT_COUNT_INC; // PCNT positive edge count mode - inc
pcnt_config.neg_mode = PCNT_COUNT_INC; // PCNT negative edge count mode - inc
pcnt_config.lctrl_mode = PCNT_MODE_DISABLE; // PCNT low control mode - disable
pcnt_config.hctrl_mode = PCNT_MODE_KEEP; // PCNT high control mode - won't change counter mode
pcnt_unit_config(&pcnt_config); // Initialize PCNT unit
pcnt_counter_pause(PCNT_COUNT_UNIT); // Pause PCNT unit
pcnt_counter_clear(PCNT_COUNT_UNIT); // Clear PCNT unit
pcnt_event_enable(PCNT_COUNT_UNIT, PCNT_EVT_H_LIM); // Enable event to watch - max count
pcnt_isr_register(pcnt_intr_handler, NULL, 0, NULL); // Setup Register ISR handler
pcnt_intr_enable(PCNT_COUNT_UNIT); // Enable interrupts for PCNT unit
pcnt_counter_resume(PCNT_COUNT_UNIT); // Resume PCNT unit - starts count
}
//----------------------------------------------------------------------------------
void read_PCNT(void *p) // Read Pulse Counter
{
gpio_set_level(OUTPUT_CONTROL_GPIO, 0); // Stop counter - output control LOW
pcnt_get_counter_value(PCNT_COUNT_UNIT, &pulses); // Read Pulse Counter value
flag = true; // Change flag to enable print
}
//---------------------------------------------------------------------------------
void init_frequencyMeter() {
init_osc_freq(); // Initialize Oscillator
init_PCNT(); // Initialize and run PCNT unit
gpio_pad_select_gpio(OUTPUT_CONTROL_GPIO); // Set GPIO pad
gpio_set_direction(OUTPUT_CONTROL_GPIO, GPIO_MODE_OUTPUT); // Set GPIO 32 as output
create_args.callback = read_PCNT; // Set esp-timer argument
esp_timer_create(&create_args, &timer_handle); // Create esp-timer instance
gpio_set_direction(IN_BOARD_LED, GPIO_MODE_OUTPUT); // Set LED inboard as output
gpio_matrix_in(PCNT_INPUT_SIG_IO, SIG_IN_FUNC226_IDX, false); // Set GPIO matrin IN - Freq Meter input
gpio_matrix_out(IN_BOARD_LED, SIG_IN_FUNC226_IDX, false, false); // Set GPIO matrix OUT - to inboard LED
}
//----------------------------------------------------------------------------------------
char *ultos_recursive(unsigned long val, char *s, unsigned radix, int pos) // Format an unsigned long (32 bits) into a string
{
int c;
if (val >= radix)
s = ultos_recursive(val / radix, s, radix, pos + 1);
c = val % radix;
c += (c < 10 ? '0' : 'a' - 10);
*s++ = c;
if (pos % 3 == 0) *s++ = ','; // decimal separator
return s;
}
//----------------------------------------------------------------------------------------
char *ltos(long val, char *s, int radix) // Format an long (32 bits) into a string
{
if (radix < 2 || radix > 36) {
s[0] = 0;
} else {
char *p = s;
if (radix == 10 && val < 0) {
val = -val;
*p++ = '-';
}
p = ultos_recursive(val, p, radix, 0) - 1;
*p = 0;
}
return s;
}
//---------------------------------------------------------------------------------
void loop() {
if (flag == true) // If count has ended
{
flag = false; // Change flag to disable print
frequency = (pulses + (multPulses * overflow)) / 2; // Calculation of frequency
printf("Frequency : %s", (ltos(frequency, buf, 10))); // Print frequency with commas
printf(" Hz \n"); // Print unity Hz
lcd.setCursor(2, 1); // Set cursor position - column and row
lcd.print((ltos(frequency, buf, 10))); // LCD print frequency
lcd.print(" Hz "); // LCD print unity Hz
multPulses = 0; // Clear overflow counter
// Put your function here, if you want
delay(100); // Delay 100 ms
// Put your function here, if you want
pcnt_counter_clear(PCNT_COUNT_UNIT); // Clear Pulse Counter
esp_timer_start_once(timer_handle, sample_time); // Initialize High resolution timer (1 sec)
gpio_set_level(OUTPUT_CONTROL_GPIO, 1); // Set enable PCNT count
}
String inputString = ""; // clear temporary string
osc_freq = 0; // Clear oscillator frequency
while (Serial.available()) {
char inChar = (char)Serial.read(); // Reads a byte on the console
inputString += inChar; // Add char to string
if (inChar == '\n') // If new line (enter)
{
osc_freq = inputString.toInt(); // Converts String into integer value
inputString = ""; // Clear string
}
}
if (osc_freq != 0) // If some value inputted to oscillator frequency
{
init_osc_freq(); // reconfigure ledc function - oscillator
}
}
Code: Select all
In file included from C:\Users\woodl\AppData\Local\Temp\.arduinoIDE-unsaved2024622-16084-1nys5hn.k2sy\sketch_jul22a\sketch_jul22a.ino:3:
C:\Users\woodl\AppData\Local\Arduino15\packages\esp32\tools\esp32-arduino-libs\idf-release_v5.1-bd2b9390ef\esp32/include/driver/deprecated/driver/pcnt.h:15:2: warning: #warning "legacy pcnt driver is deprecated, please migrate to use driver/pulse_cnt.h" [-Wcpp]
15 | #warning "legacy pcnt driver is deprecated, please migrate to use driver/pulse_cnt.h"
| ^~~~~~~Code: Select all
http://dl.espressif.com/dl/package_esp32_index.json
https://espressif.github.io/arduino-esp32/package_esp32_dev_index.json
https://espressif.github.io/arduino-esp32/package_esp32_index.jsonCode: Select all
Sketch uses 315925 bytes (24%) of program storage space. Maximum is 1310720 bytes.
Global variables use 20768 bytes (6%) of dynamic memory, leaving 306912 bytes for local variables. Maximum is 327680 bytes.
esptool.py v4.6
Serial port COM14
Connecting.....
Chip is ESP32-D0WD-V3 (revision v3.0)
Features: WiFi, BT, Dual Core, 240MHz, VRef calibration in efuse, Coding Scheme None
Crystal is 40MHz
MAC: 3c:e9:0e:85:2f:1c
Uploading stub...
Running stub...
Stub running...
Changing baud rate to 921600
Changed.
Configuring flash size...
Flash will be erased from 0x00001000 to 0x00005fff...
Flash will be erased from 0x00008000 to 0x00008fff...
Flash will be erased from 0x0000e000 to 0x0000ffff...
Flash will be erased from 0x00010000 to 0x0005dfff...
Compressed 19744 bytes to 13604...
Writing at 0x00001000... (100 %)
Wrote 19744 bytes (13604 compressed) at 0x00001000 in 0.4 seconds (effective 370.9 kbit/s)...
Hash of data verified.
Compressed 3072 bytes to 146...
Writing at 0x00008000... (100 %)
Wrote 3072 bytes (146 compressed) at 0x00008000 in 0.1 seconds (effective 420.0 kbit/s)...
Hash of data verified.
Compressed 8192 bytes to 47...
Writing at 0x0000e000... (100 %)
Wrote 8192 bytes (47 compressed) at 0x0000e000 in 0.1 seconds (effective 610.5 kbit/s)...
Hash of data verified.
Compressed 316288 bytes to 179344...
Writing at 0x00010000... (9 %)
Writing at 0x0001c2a7... (18 %)
Writing at 0x0002715f... (27 %)
Writing at 0x0002c712... (36 %)
Writing at 0x0003211c... (45 %)
Writing at 0x000376ca... (54 %)
Writing at 0x0003cda3... (63 %)
Writing at 0x00042251... (72 %)
Writing at 0x0004760e... (81 %)
Writing at 0x0004cffc... (90 %)
Writing at 0x000564d3... (100 %)
Wrote 316288 bytes (179344 compressed) at 0x00010000 in 3.3 seconds (effective 761.7 kbit/s)...
Hash of data verified.
Leaving...
Hard resetting via RTS pin...
Code: Select all
ets Jul 29 2019 12:21:46
rst:0x1 (POWERON_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)
configsip: 0, SPIWP:0xee
clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00
mode:DIO, clock div:1
load:0x3fff0030,len:1448
load:0x40078000,len:14844
ho 0 tail 12 room 4
load:0x40080400,len:4
load:0x40080404,len:3356
entry 0x4008059c
Input the Frequency - 1 to 40 MHz
6
32
Frequency : 0 Hz
Frequency : 16,000 Hz
Frequency : 16,000 Hz
Frequency : 16,000 Hz
Frequency : 16,000 Hz
Frequency : 16,000 HzCode: Select all
uint calibrator = 1; // calibrator of frequency reading (may be + or - integer numbers)
frequency_1 = (pulses_1 + (multPulses_1 * (overflow + calibrator))) / 2; // Calculation of frequencyCode: Select all
// ESP32 Frequency Meter / 2 Channel - Version 2
// ESP32 DevKit + I2C PCF8574 LCD
// Arduino IDE 2.3.2 / ESP32 Arduino V 3.02
// Gustavo Murta e Rui Viana august/2020 - 2024/07/29
// https://blog.eletrogate.com/esp32-frequencimetro-de-precisao
// https://www.esp32.com/viewtopic.php?f=19&t=17018
// References:
// https://docs.espressif.com/projects/esp-idf/en/latest/esp32/api-reference/peripherals/ledc.html
// https://docs.espressif.com/projects/esp-idf/en/latest/esp32/api-reference/system/esp_timer.html
// https://docs.espressif.com/projects/esp-idf/en/latest/esp32/api-reference/peripherals/pcnt.html
// LCD I2C SDA - GPIO_21
// LCD I2C SCL - GPIO_22
#include "stdio.h" // Library STDIO
#include "driver/ledc.h" // Library ESP32 LEDC
#include "driver/pcnt.h" // Library ESP32 PCNT
#include "soc/pcnt_struct.h" // Library ESP32 PCNT
#include "esp32/rom/gpio.h" // Library ESP32 GPIO
#include <LCD-I2C.h> // Library LCD with PCF8574
LCD_I2C lcd(0x3F, 16, 2); // Instance LCD I2C - address 0x3F
#define PCNT_COUNT_UNIT_0 PCNT_UNIT_0 // Set Pulse Counter Unit - 0
#define PCNT_COUNT_CHANNEL_0 PCNT_CHANNEL_0 // Set Pulse Counter channel - 0
#define PCNT_INPUT_SIG_IO_0 GPIO_NUM_34 // Set Pulse Counter input - Freq Meter Input GPIO 34
#define PCNT_INPUT_CTRL_IO_0 GPIO_NUM_35 // Set Pulse Counter Control GPIO pin - HIGH = count up, LOW = count down
#define OUTPUT_CONTROL_GPIO_0 GPIO_NUM_32 // Timer output control port - GPIO_32
#define PCNT_COUNT_UNIT_1 PCNT_UNIT_1 // Set Pulse Counter Unit - 1
#define PCNT_COUNT_CHANNEL_1 PCNT_CHANNEL_1 // Set Pulse Counter channel - 0
#define PCNT_INPUT_SIG_IO_1 GPIO_NUM_25 // Set Pulse Counter input - Freq Meter Input GPIO 25
#define PCNT_INPUT_CTRL_IO_1 GPIO_NUM_26 // Set Pulse Counter Control GPIO pin - HIGH = count up, LOW = count down
#define OUTPUT_CONTROL_GPIO_1 GPIO_NUM_27 // Timer output control port - GPIO_27
#define LEDC_HS_CH0_GPIO GPIO_NUM_33 // LEDC output - pulse generator 0 - GPIO_33
#define LEDC_HS_CH1_GPIO GPIO_NUM_14 // LEDC output - pulse generator 1 - GPIO_14
#define IN_BOARD_LED GPIO_NUM_2 // ESP32 native LED - GPIO 2
#define PCNT_H_LIM_VAL overflow // Overflow of Pulse Counter
uint32_t overflow = 32000; // Max Pulse Counter value 32000 - limit 32767
uint32_t sample_time = 1000000; // Sample time of 1 second to count pulses (change the value to calibrate frequency meter)
uint calibrator = 1; // calibrator of frequency reading (may be + or - integer numbers)
bool flag_0 = true; // Flag to enable print frequency reading
int16_t pulses_0 = 0; // Pulse Counter value
uint32_t multPulses_0 = 0; // Number of PCNT counter overflows
float frequency_0 = 0; // frequency value
bool flag_1 = true; // Flag to enable print frequency reading
int16_t pulses_1 = 0; // Pulse Counter value
uint32_t multPulses_1 = 0; // Number of PCNT counter overflows
float frequency_1 = 0; // frequency value
uint32_t osc_freq_0 = 38000; // Oscillator frequency - initial 32000 Hz (may be 1 Hz to 40 MHz)
uint32_t mDuty_0 = 0; // Duty cycle value
uint32_t resolution_0 = 0; // Resolution value of Oscillator
uint32_t osc_freq_1 = 10000; // Oscillator frequency - initial 16000 Hz (may be 1 Hz to 40 MHz)
uint32_t mDuty_1 = 0; // Duty cycle value
uint32_t resolution_1 = 0; // Resolution value of Oscillator
char buf_0[32]; // Buffer 0
char buf_1[32]; // Buffer 1
esp_timer_create_args_t timer_args_0; // Create an esp_timer instance
esp_timer_handle_t timer_handle_0; // Create an single timer
esp_timer_create_args_t timer_args_1; // Create an esp_timer instance
esp_timer_handle_t timer_handle_1; // Create an single timer
portMUX_TYPE timerMux = portMUX_INITIALIZER_UNLOCKED; // portMUX_TYPE to do synchronism
//----------------------------------------------------------------------------------------
void setup() {
Serial.begin(115200); // Serial Console Arduino 115200 Bps
Serial.println(); // Print line
Serial.println(" Input the Frequency - 1 to 40 MHz"); // Console print
Serial.println(" Oscillators have some accuracy limitations "); // Console print
Serial.println(); // Print line
lcd.begin();
lcd.display();
lcd.backlight();
lcd.setCursor(0, 0); // Set cursor position - column and row
lcd.print("F0:"); // LCD print
lcd.setCursor(0, 1); // Set cursor position - column and row
lcd.print("F1:"); // LCD print
init_frequencyMeter(); // Initialize Frequency Meter
}
//----------------------------------------------------------------------------
void init_osc_freq_0() // Initialize Oscillator to test Freq Meter
{
resolution_0 = (log(80000000 / osc_freq_0) / log(2)) / 2; // Calc of resolution of Oscillator
if (resolution_0 < 1) resolution_0 = 1; // set min resolution
// Serial.println(resolution); // Print
mDuty_0 = (pow(2, resolution_0)) / 2; // Calc of Duty Cycle 50% of the pulse
// Serial.println(mDuty); // Print
ledc_timer_config_t ledc_timer = {}; // LEDC timer config instance
ledc_timer.duty_resolution = ledc_timer_bit_t(resolution_0); // Set resolution
ledc_timer.freq_hz = osc_freq_0; // Set Oscillator frequency
ledc_timer.speed_mode = LEDC_HIGH_SPEED_MODE; // Set high speed mode
ledc_timer.timer_num = LEDC_TIMER_0; // Set LEDC timer index - 0
ledc_timer_config(&ledc_timer); // Set LEDC Timer config
ledc_channel_config_t ledc_channel = {}; // LEDC Channel config instance
ledc_channel.channel = LEDC_CHANNEL_0; // Set HS Channel - 0
ledc_channel.duty = mDuty_0; // Set Duty Cycle 50%
ledc_channel.gpio_num = LEDC_HS_CH0_GPIO; // LEDC Oscillator output GPIO 33
ledc_channel.intr_type = LEDC_INTR_DISABLE; // LEDC Fade interrupt disable
ledc_channel.speed_mode = LEDC_HIGH_SPEED_MODE; // Set LEDC high speed mode
ledc_channel.timer_sel = LEDC_TIMER_0; // Set timer source of channel - 0
ledc_channel_config(&ledc_channel); // Config LEDC channel
}
//----------------------------------------------------------------------------
void init_osc_freq_1() // Initialize Oscillator to test Freq Meter
{
resolution_1 = (log(80000000 / osc_freq_1) / log(2)) / 2; // Calc of resolution of Oscillator
if (resolution_1 < 1) resolution_1 = 1; // set min resolution
// Serial.println(resolution); // Print
mDuty_1 = (pow(2, resolution_1)) / 2; // Calc of Duty Cycle 50% of the pulse
// Serial.println(mDuty); // Print
ledc_timer_config_t ledc_timer = {}; // LEDC timer config instance
ledc_timer.duty_resolution = ledc_timer_bit_t(resolution_1); // Set resolution
ledc_timer.freq_hz = osc_freq_1; // Set Oscillator frequency
ledc_timer.speed_mode = LEDC_HIGH_SPEED_MODE; // Set high speed mode
ledc_timer.timer_num = LEDC_TIMER_1; // Set LEDC timer index - 0
ledc_timer_config(&ledc_timer); // Set LEDC Timer config
ledc_channel_config_t ledc_channel = {}; // LEDC Channel config instance
ledc_channel.channel = LEDC_CHANNEL_1; // Set HS Channel - 0
ledc_channel.duty = mDuty_1; // Set Duty Cycle 50%
ledc_channel.gpio_num = LEDC_HS_CH1_GPIO; // LEDC Oscillator output GPIO 14
ledc_channel.intr_type = LEDC_INTR_DISABLE; // LEDC Fade interrupt disable
ledc_channel.speed_mode = LEDC_HIGH_SPEED_MODE; // Set LEDC high speed mode
ledc_channel.timer_sel = LEDC_TIMER_1; // Set timer source of channel - 0
ledc_channel_config(&ledc_channel); // Config LEDC channel
}
//----------------------------------------------------------------------------------
static void IRAM_ATTR pcnt_intr_handler_0(void *arg) // Counting overflow pulses
{
multPulses_0++; // increment Overflow counter
PCNT.int_clr.val = BIT(PCNT_COUNT_UNIT_0); // Clear Pulse Counter interrupt bit
pcnt_counter_resume(PCNT_COUNT_UNIT_0); // Resume PCNT unit - starts count
}
//----------------------------------------------------------------------------------
static void IRAM_ATTR pcnt_intr_handler_1(void *arg) // Counting overflow pulses
{
multPulses_1++; // increment Overflow counter
PCNT.int_clr.val = BIT(PCNT_COUNT_UNIT_1); // Clear Pulse Counter interrupt bit
pcnt_counter_resume(PCNT_COUNT_UNIT_1); // Resume PCNT unit - starts count
}
//----------------------------------------------------------------------------------
void init_PCNT_0(void) // Initialize and run PCNT 0 unit
{
gpio_pad_select_gpio(OUTPUT_CONTROL_GPIO_0); // Set GPIO pad
gpio_set_direction(OUTPUT_CONTROL_GPIO_0, GPIO_MODE_OUTPUT); // Set GPIO 32 as Timer output
timer_args_0.callback = read_PCNT_0; // Function to call when the timer expires - stop counter
esp_timer_create(&timer_args_0, &timer_handle_0); // Create esp-timer instance / single timer
pcnt_config_t pcnt_config_0 = {}; // PCNT unit instance
pcnt_config_0.pulse_gpio_num = PCNT_INPUT_SIG_IO_0; // Pulse input GPIO 34 - Freq Meter Input
pcnt_config_0.ctrl_gpio_num = PCNT_INPUT_CTRL_IO_0; // Pulse Count Control signal - input GPIO 35
pcnt_config_0.unit = PCNT_COUNT_UNIT_0; // Pulse Count Unit PCNT - 0
pcnt_config_0.channel = PCNT_COUNT_CHANNEL_0; // Pulse Count Unit Channel - 0
pcnt_config_0.counter_h_lim = PCNT_H_LIM_VAL; // Maximum counter value - 32000 pulses
pcnt_config_0.pos_mode = PCNT_COUNT_INC; // PCNT positive edge count mode - inc
pcnt_config_0.neg_mode = PCNT_COUNT_INC; // PCNT negative edge count mode - inc
pcnt_config_0.lctrl_mode = PCNT_MODE_DISABLE; // PCNT low control mode - disable
pcnt_config_0.hctrl_mode = PCNT_MODE_KEEP; // PCNT high control mode - won't change counter mode
pcnt_unit_config(&pcnt_config_0); // Initialize PCNT unit
pcnt_event_enable(PCNT_COUNT_UNIT_0, PCNT_EVT_H_LIM); // Enable event to watch - max count
pcnt_isr_register(pcnt_intr_handler_0, NULL, 0, NULL); // Setup Register ISR handler
pcnt_intr_enable(PCNT_COUNT_UNIT_0); // Enable interrupts for PCNT unit
}
//----------------------------------------------------------------------------------
void init_PCNT_1(void) // Initialize and run PCNT 1 unit
{
gpio_pad_select_gpio(OUTPUT_CONTROL_GPIO_1); // Set GPIO pad
gpio_set_direction(OUTPUT_CONTROL_GPIO_1, GPIO_MODE_OUTPUT); // Set GPIO 27 as Timer output
timer_args_1.callback = read_PCNT_1; // Function to call when the timer expires - stop counter
esp_timer_create(&timer_args_1, &timer_handle_1); // Create esp-timer instance / single timer
pcnt_config_t pcnt_config_1 = {}; // PCNT unit instance
pcnt_config_1.pulse_gpio_num = PCNT_INPUT_SIG_IO_1; // Pulse input GPIO 25 - Freq Meter Input
pcnt_config_1.ctrl_gpio_num = PCNT_INPUT_CTRL_IO_1; // Pulse Count Control signal - input GPIO 26
pcnt_config_1.unit = PCNT_COUNT_UNIT_1; // Pulse Count Unit PCNT - 1
pcnt_config_1.channel = PCNT_COUNT_CHANNEL_1; // Pulse Count Unit Channel - 1
pcnt_config_1.counter_h_lim = PCNT_H_LIM_VAL; // Maximum counter value - 32000 pulses
pcnt_config_1.pos_mode = PCNT_COUNT_INC; // PCNT positive edge count mode - inc
pcnt_config_1.neg_mode = PCNT_COUNT_INC; // PCNT negative edge count mode - inc
pcnt_config_1.lctrl_mode = PCNT_MODE_DISABLE; // PCNT low control mode - disable
pcnt_config_1.hctrl_mode = PCNT_MODE_KEEP; // PCNT high control mode - won't change counter mode
pcnt_unit_config(&pcnt_config_1); // Initialize PCNT unit
pcnt_event_enable(PCNT_COUNT_UNIT_1, PCNT_EVT_H_LIM); // Enable event to watch - max count
pcnt_isr_register(pcnt_intr_handler_1, NULL, 1, NULL); // Setup Register ISR handler
pcnt_intr_enable(PCNT_COUNT_UNIT_1); // Enable interrupts for PCNT unit
}
//----------------------------------------------------------------------------------
void read_PCNT_0(void *p) // Read Pulse Counter 0 - timeout callback
{
pcnt_get_counter_value(PCNT_COUNT_UNIT_0, &pulses_0); // Read Pulse Counter value
gpio_set_level(OUTPUT_CONTROL_GPIO_0, 0); // Stop counter - GPIO 32 - output control LOW
flag_0 = true; // Change flag 0 to enable print
}
//----------------------------------------------------------------------------------
void read_PCNT_1(void *p) // Read Pulse Counter 1 - timeout callback
{
pcnt_get_counter_value(PCNT_COUNT_UNIT_1, &pulses_1); // Read Pulse Counter value
gpio_set_level(OUTPUT_CONTROL_GPIO_1, 0); // Stop counter - GPIO 27 - output control LOW
flag_1 = true; // Change flag 1 to enable print
}
//---------------------------------------------------------------------------------
void init_frequencyMeter() {
init_osc_freq_0(); // Config and Initialize Oscillator 0
init_osc_freq_1(); // Config and Initialize Oscillator 1
init_PCNT_0(); // Config and Initialize PCNT 0 unit
init_PCNT_1(); // Config and Initialize PCNT 1 unit
gpio_set_direction(IN_BOARD_LED, GPIO_MODE_OUTPUT); // Set LED inboard as output
gpio_matrix_in(PCNT_INPUT_SIG_IO_0, SIG_IN_FUNC226_IDX, false); // Set GPIO matrin IN - Freq Meter CH0 input
gpio_matrix_out(IN_BOARD_LED, SIG_IN_FUNC226_IDX, false, false); // Set GPIO matrix OUT - to inboard LED
}
//----------------------------------------------------------------------------------------
char *ultos_recursive(unsigned long val, char *s, unsigned radix, int pos) // Format an unsigned long (32 bits) into a string
{
int c;
if (val >= radix)
s = ultos_recursive(val / radix, s, radix, pos + 1);
c = val % radix;
c += (c < 10 ? '0' : 'a' - 10);
*s++ = c;
if (pos % 3 == 0) *s++ = ','; // decimal separator
return s;
}
//----------------------------------------------------------------------------------------
char *ltos(long val, char *s, int radix) // Format an long (32 bits) into a string
{
if (radix < 2 || radix > 36) {
s[0] = 0;
} else {
char *p = s;
if (radix == 10 && val < 0) {
val = -val;
*p++ = '-';
}
p = ultos_recursive(val, p, radix, 0) - 1;
*p = 0;
}
return s;
}
//---------------------------------------------------------------------------------
void loop() {
if (flag_0 == true) { // If count 0 has ended
flag_0 = false; // Change flag to enable count
frequency_0 = (pulses_0 + (multPulses_0 * (overflow + calibrator))) / 2; // Calculation of frequency
printf("Frequency CH0: %s", (ltos(frequency_0, buf_0, 10))); // Print frequency with commas
printf(" Hz \n"); // Print unity Hz
lcd.setCursor(3, 0); // Set cursor position - column and row
lcd.print(" "); // Clear Field
lcd.setCursor(3, 0);
lcd.print((ltos(frequency_0, buf_0, 10))); // LCD print frequency
lcd.print(" Hz"); // LCD print unity Hz
multPulses_0 = 0; // Clear overflow counter
pcnt_counter_clear(PCNT_COUNT_UNIT_0); // Clear Pulse Counter 0 pcnt_unit_clear_count
esp_timer_start_once(timer_handle_0, sample_time); // Start High resolution timer (1 sec)
gpio_set_level(OUTPUT_CONTROL_GPIO_0, 1); // Set enable PCNT count 0 - GPIO 32
}
if (flag_1 == true) { // If count 1 has ended
flag_1 = false; // Change flag to enable count
frequency_1 = (pulses_1 + (multPulses_1 * (overflow + calibrator))) / 2; // Calculation of frequency
printf("Frequency CH1: %s", (ltos(frequency_1, buf_1, 10))); // Print frequency with commas
printf(" Hz \n"); // Print unity Hz
Serial.println(); // Print line
lcd.setCursor(3, 1); // Set cursor position - column and row
lcd.print(" "); // Clear field
lcd.setCursor(3, 1);
lcd.print((ltos(frequency_1, buf_1, 10))); // LCD print frequency
lcd.print(" Hz"); // LCD print unity Hz
multPulses_1 = 0; // Clear overflow counter
pcnt_counter_clear(PCNT_COUNT_UNIT_1); // Clear Pulse Counter 1
esp_timer_start_once(timer_handle_1, sample_time); // Start High resolution timer (1 sec)
gpio_set_level(OUTPUT_CONTROL_GPIO_1, 1); // Set enable PCNT count 1 - GPIO 27
}
// Input of frequency value
String inputString = ""; // clear temporary string
osc_freq_0 = 0; // Clear oscillator 0 frequency
osc_freq_1 = 0; // Clear oscillator 1 frequency
while (Serial.available()) {
char inChar = (char)Serial.read(); // Reads a byte on the console
inputString += inChar; // Add char to string
if (inChar == '\n') // If new line (enter)
{
osc_freq_0 = inputString.toInt(); // Converts String into integer value
osc_freq_1 = osc_freq_0;
inputString = ""; // Clear string
}
}
if (osc_freq_0 != 0) // If some value inputted to oscillator frequency
{
init_osc_freq_0(); // reconfigure ledc function - oscillator 0
init_osc_freq_1(); // reconfigure ledc function - oscillator 1
}
}
Code: Select all
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Input the Frequency - 1 to 40 MHz
Oscillators have some accuracy limitations
Frequency CH0: 0 Hz
Frequency CH1: 0 Hz
Frequency CH0: 38,002 Hz
Frequency CH1: 10,000 Hz
Frequency CH0: 38,001 Hz
Frequency CH1: 10,000 Hz
Frequency CH0: 38,001 Hz
Frequency CH1: 10,000 Hz
Frequency CH0: 38,001 Hz
Frequency CH1: 10,000 Hz
Frequency CH0: 38,001 Hz
Frequency CH1: 10,000 HzCode: Select all
// ESP32 Frequency Meter / 2 Channel - Version 3
// ESP32 DevKit + I2C PCF8574 LCD
// Arduino IDE 2.3.2 / ESP32 Arduino V 3.02
// Gustavo Murta e Rui Viana august/2020 - 2024/07/30
// https://blog.eletrogate.com/esp32-frequencimetro-de-precisao
// https://www.esp32.com/viewtopic.php?f=19&t=17018
// References:
// https://docs.espressif.com/projects/esp-idf/en/latest/esp32/api-reference/peripherals/ledc.html
// https://docs.espressif.com/projects/esp-idf/en/latest/esp32/api-reference/system/esp_timer.html
// https://docs.espressif.com/projects/esp-idf/en/latest/esp32/api-reference/peripherals/pcnt.html
// LCD I2C SDA - GPIO_21
// LCD I2C SCL - GPIO_22
#include "stdio.h" // Library STDIO
#include "driver/ledc.h" // Library ESP32 LEDC
#include "driver/pcnt.h" // Library ESP32 PCNT
#include "soc/pcnt_struct.h" // Library ESP32 PCNT
#include "esp32/rom/gpio.h" // Library ESP32 GPIO
#include <LCD-I2C.h> // Library LCD with PCF8574
LCD_I2C lcd(0x3F, 16, 2); // Instance LCD I2C - address 0x3F
#define PCNT_COUNT_UNIT_0 PCNT_UNIT_0 // Set Pulse Counter Unit - 0
#define PCNT_COUNT_CHANNEL_0 PCNT_CHANNEL_0 // Set Pulse Counter channel - 0
#define PCNT_INPUT_SIG_IO_0 GPIO_NUM_34 // Set Pulse Counter input - Freq Meter Input GPIO 34
#define PCNT_INPUT_CTRL_IO_0 GPIO_NUM_35 // Set Pulse Counter Control GPIO pin - HIGH = count up, LOW = count down
#define OUTPUT_CONTROL_GPIO_0 GPIO_NUM_32 // Timer output control port - GPIO_32
#define PCNT_COUNT_UNIT_1 PCNT_UNIT_1 // Set Pulse Counter Unit - 1
#define PCNT_COUNT_CHANNEL_1 PCNT_CHANNEL_1 // Set Pulse Counter channel - 0
#define PCNT_INPUT_SIG_IO_1 GPIO_NUM_25 // Set Pulse Counter input - Freq Meter Input GPIO 25
#define PCNT_INPUT_CTRL_IO_1 GPIO_NUM_26 // Set Pulse Counter Control GPIO pin - HIGH = count up, LOW = count down
#define OUTPUT_CONTROL_GPIO_1 GPIO_NUM_27 // Timer output control port - GPIO_27
#define LEDC_HS_CH0_GPIO GPIO_NUM_33 // LEDC output - pulse generator 0 - GPIO_33
#define LEDC_HS_CH1_GPIO GPIO_NUM_14 // LEDC output - pulse generator 1 - GPIO_14
#define PCNT_H_LIM_VAL overflow // Overflow of Pulse Counter
uint32_t overflow = 32000; // Max Pulse Counter value 32000 - limit 32767
uint32_t sample_time = 1000000; // Sample time of 1 second to count pulses
uint calibrator = 1; // calibrator of frequency reading (may be + or - integer numbers)
bool flag_0 = false; // Flag to enable print frequency reading
int16_t pulses_0 = 0; // Pulse Counter value
uint32_t multPulses_0 = 0; // Number of PCNT counter overflows
float frequency_0 = 0; // frequency value
bool pressEnter = false; //
bool flag_1 = true; // Flag to enable print frequency reading
int16_t pulses_1 = 0; // Pulse Counter value
uint32_t multPulses_1 = 0; // Number of PCNT counter overflows
float frequency_1 = 0; // frequency value
uint32_t osc_freq_0 = 10000; // Oscillator frequency - initial 10000 Hz (may be 1 Hz to 40 MHz)
uint32_t mDuty_0 = 0; // Duty cycle value
uint32_t resolution_0 = 0; // Resolution value of Oscillator
uint32_t osc_freq_1 = 20000; // Oscillator frequency - initial 20000 Hz (may be 1 Hz to 40 MHz)
uint32_t mDuty_1 = 0; // Duty cycle value
uint32_t resolution_1 = 0; // Resolution value of Oscillator
char buf_0[32]; // Buffer 0
char buf_1[32]; // Buffer 1
esp_timer_create_args_t timer_args_0; // Create an esp_timer instance
esp_timer_handle_t timer_handle_0; // Create an single timer
esp_timer_create_args_t timer_args_1; // Create an esp_timer instance
esp_timer_handle_t timer_handle_1; // Create an single timer
pcnt_isr_handle_t pcnt_intr_handle_0;
pcnt_isr_handle_t pcnt_intr_handle_1;
//----------------------------------------------------------------------------------------
void setup() {
Serial.begin(115200); // Serial Console Arduino 115200 Bps
Serial.println(); // Print line
Serial.println(" Enter the Frequency - 1 to 40 MHz - First Osc 0 / Second Osc 1"); // Console print
Serial.println(" Oscillators have some accuracy limitations "); // Console print
Serial.println(); // Print line
lcd.begin();
lcd.display();
lcd.backlight();
lcd.setCursor(0, 0); // Set cursor position - column and row
lcd.print("F0:"); // LCD print
lcd.setCursor(0, 1); // Set cursor position - column and row
lcd.print("F1:"); // LCD print
init_frequencyMeter(); // Initialize Frequency Meter
}
//----------------------------------------------------------------------------
void init_osc_freq_0() // Initialize Oscillator to test Freq Meter
{
resolution_0 = (log(80000000 / osc_freq_0) / log(2)) / 2; // Calc of resolution of Oscillator
if (resolution_0 < 1) resolution_0 = 1; // set min resolution
// Serial.println(resolution); // Print
mDuty_0 = (pow(2, resolution_0)) / 2; // Calc of Duty Cycle 50% of the pulse
// Serial.println(mDuty); // Print
ledc_timer_config_t ledc_timer = {}; // LEDC timer config instance
ledc_timer.duty_resolution = ledc_timer_bit_t(resolution_0); // Set resolution
ledc_timer.freq_hz = osc_freq_0; // Set Oscillator frequency
ledc_timer.speed_mode = LEDC_HIGH_SPEED_MODE; // Set high speed mode
ledc_timer.timer_num = LEDC_TIMER_0; // Set LEDC timer index - 0
ledc_timer_config(&ledc_timer); // Set LEDC Timer config
ledc_channel_config_t ledc_channel = {}; // LEDC Channel config instance
ledc_channel.channel = LEDC_CHANNEL_0; // Set HS Channel - 0
ledc_channel.duty = mDuty_0; // Set Duty Cycle 50%
ledc_channel.gpio_num = LEDC_HS_CH0_GPIO; // LEDC Oscillator output GPIO 33
ledc_channel.intr_type = LEDC_INTR_DISABLE; // LEDC Fade interrupt disable
ledc_channel.speed_mode = LEDC_HIGH_SPEED_MODE; // Set LEDC high speed mode
ledc_channel.timer_sel = LEDC_TIMER_0; // Set timer source of channel - 0
ledc_channel_config(&ledc_channel); // Config LEDC channel
}
//----------------------------------------------------------------------------
void init_osc_freq_1() // Initialize Oscillator to test Freq Meter
{
resolution_1 = (log(80000000 / osc_freq_1) / log(2)) / 2; // Calc of resolution of Oscillator
if (resolution_1 < 1) resolution_1 = 1; // set min resolution
// Serial.println(resolution); // Print
mDuty_1 = (pow(2, resolution_1)) / 2; // Calc of Duty Cycle 50% of the pulse
// Serial.println(mDuty); // Print
ledc_timer_config_t ledc_timer = {}; // LEDC timer config instance
ledc_timer.duty_resolution = ledc_timer_bit_t(resolution_1); // Set resolution
ledc_timer.freq_hz = osc_freq_1; // Set Oscillator frequency
ledc_timer.speed_mode = LEDC_HIGH_SPEED_MODE; // Set high speed mode
ledc_timer.timer_num = LEDC_TIMER_1; // Set LEDC timer index - 0
ledc_timer_config(&ledc_timer); // Set LEDC Timer config
ledc_channel_config_t ledc_channel = {}; // LEDC Channel config instance
ledc_channel.channel = LEDC_CHANNEL_1; // Set HS Channel - 0
ledc_channel.duty = mDuty_1; // Set Duty Cycle 50%
ledc_channel.gpio_num = LEDC_HS_CH1_GPIO; // LEDC Oscillator output GPIO 14
ledc_channel.intr_type = LEDC_INTR_DISABLE; // LEDC Fade interrupt disable
ledc_channel.speed_mode = LEDC_HIGH_SPEED_MODE; // Set LEDC high speed mode
ledc_channel.timer_sel = LEDC_TIMER_1; // Set timer source of channel - 0
ledc_channel_config(&ledc_channel); // Config LEDC channel
}
//----------------------------------------------------------------------------------
static void IRAM_ATTR pcnt_intr_handler_0(void *arg) // Counting overflow pulses
{
multPulses_0++; // increment Overflow counter
PCNT.int_clr.val = BIT(PCNT_COUNT_UNIT_0); // Clear Pulse Counter interrupt bit
pcnt_counter_resume(PCNT_COUNT_UNIT_0); // Resume PCNT unit - starts count
}
//----------------------------------------------------------------------------------
static void IRAM_ATTR pcnt_intr_handler_1(void *arg) // Counting overflow pulses
{
multPulses_1++; // increment Overflow counter
PCNT.int_clr.val = BIT(PCNT_COUNT_UNIT_1); // Clear Pulse Counter interrupt bit
pcnt_counter_resume(PCNT_COUNT_UNIT_1); // Resume PCNT unit - starts count
}
//----------------------------------------------------------------------------------
void init_PCNT_0(void) // Initialize and run PCNT 0 unit
{
gpio_pad_select_gpio(OUTPUT_CONTROL_GPIO_0); // Set GPIO pad
gpio_set_direction(OUTPUT_CONTROL_GPIO_0, GPIO_MODE_OUTPUT); // Set GPIO 32 as Timer output
timer_args_0.callback = read_PCNT_0; // Function to call when the timer expires - stop counter
esp_timer_create(&timer_args_0, &timer_handle_0); // Create esp-timer instance / single timer
pcnt_config_t pcnt_config_0 = {}; // PCNT unit instance
pcnt_config_0.pulse_gpio_num = PCNT_INPUT_SIG_IO_0; // Pulse input GPIO 34 - Freq Meter Input
pcnt_config_0.ctrl_gpio_num = PCNT_INPUT_CTRL_IO_0; // Pulse Count Control signal - input GPIO 35
pcnt_config_0.unit = PCNT_COUNT_UNIT_0; // Pulse Count Unit PCNT - 0
pcnt_config_0.channel = PCNT_COUNT_CHANNEL_0; // Pulse Count Unit Channel - 0
pcnt_config_0.counter_h_lim = PCNT_H_LIM_VAL; // Maximum counter value - 32000 pulses
pcnt_config_0.pos_mode = PCNT_COUNT_INC; // PCNT positive edge count mode - inc
pcnt_config_0.neg_mode = PCNT_COUNT_INC; // PCNT negative edge count mode - inc
pcnt_config_0.lctrl_mode = PCNT_MODE_DISABLE; // PCNT low control mode - disable
pcnt_config_0.hctrl_mode = PCNT_MODE_KEEP; // PCNT high control mode - won't change counter mode
pcnt_unit_config(&pcnt_config_0); // Initialize PCNT unit
pcnt_event_enable(PCNT_COUNT_UNIT_0, PCNT_EVT_H_LIM); // Enable event to watch - max count
pcnt_intr_enable(PCNT_COUNT_UNIT_0); // Enable interrupts for PCNT unit
}
//----------------------------------------------------------------------------------
void init_PCNT_1(void) // Initialize and run PCNT 1 unit
{
gpio_pad_select_gpio(OUTPUT_CONTROL_GPIO_1); // Set GPIO pad
gpio_set_direction(OUTPUT_CONTROL_GPIO_1, GPIO_MODE_OUTPUT); // Set GPIO 27 as Timer output
timer_args_1.callback = read_PCNT_1; // Function to call when the timer expires - stop counter
esp_timer_create(&timer_args_1, &timer_handle_1); // Create esp-timer instance / single timer
pcnt_config_t pcnt_config_1 = {}; // PCNT unit instance
pcnt_config_1.pulse_gpio_num = PCNT_INPUT_SIG_IO_1; // Pulse input GPIO 25 - Freq Meter Input
pcnt_config_1.ctrl_gpio_num = PCNT_INPUT_CTRL_IO_1; // Pulse Count Control signal - input GPIO 26
pcnt_config_1.unit = PCNT_COUNT_UNIT_1; // Pulse Count Unit PCNT - 1
pcnt_config_1.channel = PCNT_COUNT_CHANNEL_1; // Pulse Count Unit Channel - 1
pcnt_config_1.counter_h_lim = PCNT_H_LIM_VAL; // Maximum counter value - 32000 pulses
pcnt_config_1.pos_mode = PCNT_COUNT_INC; // PCNT positive edge count mode - inc
pcnt_config_1.neg_mode = PCNT_COUNT_INC; // PCNT negative edge count mode - inc
pcnt_config_1.lctrl_mode = PCNT_MODE_DISABLE; // PCNT low control mode - disable
pcnt_config_1.hctrl_mode = PCNT_MODE_KEEP; // PCNT high control mode - won't change counter mode
pcnt_unit_config(&pcnt_config_1); // Initialize PCNT unit
pcnt_event_enable(PCNT_COUNT_UNIT_1, PCNT_EVT_H_LIM); // Enable event to watch - max count
pcnt_intr_enable(PCNT_COUNT_UNIT_1); // Enable interrupts for PCNT unit
}
//----------------------------------------------------------------------------------
void read_PCNT_0(void *p) // Read Pulse Counter 0 - timeout callback
{
pcnt_get_counter_value(PCNT_COUNT_UNIT_0, &pulses_0); // Read Pulse Counter value
gpio_set_level(OUTPUT_CONTROL_GPIO_0, 0); // Stop counter - GPIO 32 - output control LOW
flag_0 = true; // Change flag 0 to enable print
}
//----------------------------------------------------------------------------------
void read_PCNT_1(void *p) // Read Pulse Counter 1 - timeout callback
{
pcnt_get_counter_value(PCNT_COUNT_UNIT_1, &pulses_1); // Read Pulse Counter value
gpio_set_level(OUTPUT_CONTROL_GPIO_1, 0); // Stop counter - GPIO 27 - output control LOW
flag_1 = true; // Change flag 1 to enable print
}
//---------------------------------------------------------------------------------
void init_frequencyMeter() {
init_osc_freq_0(); // Config and Initialize Oscillator 0
init_osc_freq_1(); // Config and Initialize Oscillator 1
init_PCNT_0(); // Config and Initialize PCNT 0 unit
init_PCNT_1(); // Config and Initialize PCNT 1 unit
}
//----------------------------------------------------------------------------------------
char *ultos_recursive(unsigned long val, char *s, unsigned radix, int pos) // Format an unsigned long (32 bits) into a string
{
int c;
if (val >= radix)
s = ultos_recursive(val / radix, s, radix, pos + 1);
c = val % radix;
c += (c < 10 ? '0' : 'a' - 10);
*s++ = c;
if (pos % 3 == 0) *s++ = ','; // decimal separator
return s;
}
//----------------------------------------------------------------------------------------
char *ltos(long val, char *s, int radix) // Format an long (32 bits) into a string
{
if (radix < 2 || radix > 36) {
s[0] = 0;
} else {
char *p = s;
if (radix == 10 && val < 0) {
val = -val;
*p++ = '-';
}
p = ultos_recursive(val, p, radix, 0) - 1;
*p = 0;
}
return s;
}
//---------------------------------------------------------------------------------
void loop() {
if (flag_0 == true) { // If count 0 has ended
flag_0 = false; // Change flag to enable count
pcnt_isr_unregister(pcnt_intr_handle_0); // Unregister PCNT interrupt handler 0
frequency_0 = (pulses_0 + (multPulses_0 * (overflow + calibrator))) / 2; // Calculation of frequency
printf("Frequency CH0: %s", (ltos(frequency_0, buf_0, 10))); // Print frequency with commas
printf(" Hz \n"); // Print unity Hz
lcd.setCursor(3, 0); // Set cursor position - column and row
lcd.print(" "); // Clear Field
lcd.setCursor(3, 0);
lcd.print((ltos(frequency_0, buf_0, 10))); // LCD print frequency
lcd.print(" Hz"); // LCD print unity Hz
multPulses_1 = 0; // Clear overflow counter 1
pcnt_counter_clear(PCNT_COUNT_UNIT_1); // Clear Pulse Counter 1
esp_timer_start_once(timer_handle_1, sample_time); // Start High resolution timer (1 sec)
gpio_set_level(OUTPUT_CONTROL_GPIO_1, 1); // Set enable PCNT count 1 - GPIO 27
pcnt_isr_register(pcnt_intr_handler_1, NULL, 0, &pcnt_intr_handle_1); // Setup Register ISR handler
}
if (flag_1 == true) { // If count 1 has ended
flag_1 = false; // Change flag to enable count
pcnt_isr_unregister(pcnt_intr_handle_1); // Unregister PCNT interrupt handler 1
frequency_1 = (pulses_1 + (multPulses_1 * (overflow + calibrator))) / 2; // Calculation of frequency
printf("Frequency CH1: %s", (ltos(frequency_1, buf_1, 10))); // Print frequency with commas
printf(" Hz \n"); // Print unity Hz
Serial.println(); // Print line
lcd.setCursor(3, 1); // Set cursor position - column and row
lcd.print(" "); // Clear field
lcd.setCursor(3, 1);
lcd.print((ltos(frequency_1, buf_1, 10))); // LCD print frequency
lcd.print(" Hz"); // LCD print unity Hz
multPulses_0 = 0; // Clear overflow counter 0
pcnt_counter_clear(PCNT_COUNT_UNIT_0); // Clear Pulse Counter 0 pcnt_unit_clear_count
esp_timer_start_once(timer_handle_0, sample_time); // Start High resolution timer (1 sec)
gpio_set_level(OUTPUT_CONTROL_GPIO_0, 1); // Set enable PCNT count 0 - GPIO 32
pcnt_isr_register(pcnt_intr_handler_0, NULL, 0, &pcnt_intr_handle_0); // Setup Register ISR handler
}
// Input of frequency value => First Osc 0 - Second Osc 1
String inputString = ""; // clear temporary string
while (Serial.available()) {
char inChar = (char)Serial.read(); // Reads a byte on the console
inputString += inChar; // Add char to string
if (inChar == '\n') // If press enter
{
if (pressEnter == false) {
osc_freq_0 = inputString.toInt(); // Converts String into integer value
Serial.print("Osc. 0 = ");
Serial.println(osc_freq_0); // Print Oscillator 0
Serial.println(); // Print line
init_osc_freq_0(); // reconfigure ledc function - oscillator 0
inputString = ""; // Clear string
} else {
osc_freq_1 = inputString.toInt(); // Converts String into integer value
Serial.print("Osc. 1 = ");
Serial.println(osc_freq_1); // Print Oscillator 0
Serial.println(); // Print line
init_osc_freq_1(); // reconfigure ledc function - oscillator 1
inputString = ""; // Clear string
}
pressEnter = !pressEnter; // invert pressEnter
}
}
}
Code: Select all
ets Jul 29 2019 12:21:46
rst:0x1 (POWERON_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)
configsip: 0, SPIWP:0xee
clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00
mode:DIO, clock div:1
load:0x3fff0030,len:1448
load:0x40078000,len:14844
ho 0 tail 12 room 4
load:0x40080400,len:4
load:0x40080404,len:3356
entry 0x4008059c
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Calculated checksum='cbb3a019'
Image chec
Enter the Frequency - 1 to 40 MHz - First Osc 0 / Second Osc 1
Oscillators have some accuracy limitations
Frequency CH1: 0 Hz
Frequency CH0: 10,000 Hz
Frequency CH1: 20,000 Hz
Frequency CH0: 10,000 Hz
Frequency CH1: 20,001 Hz
Frequency CH0: 10,000 Hz
Frequency CH1: 20,000 Hz
Frequency CH0: 10,000 Hz
Frequency CH1: 20,000 HzUsers browsing this forum: No registered users and 81 guests