Search found 19 matches

by Humam Helfawi
Sat Dec 07, 2019 11:20 am
Forum: ESP-IDF
Topic: PWM Generating at expanded GPIO
Replies: 3
Views: 5639

Re: PWM Generating at expanded GPIO

The best way is use an expander that has a built in led driver Thanks for your reply! Do you have any suggestion? I found this one http://www.ti.com/lit/an/snva287a/snva287a.pdf. but I think it is overkill (16 IOs). I am looking for at max 4 IOs only single one of them should have PWM ability.
by Humam Helfawi
Sat Dec 07, 2019 11:09 am
Forum: ESP-IDF
Topic: PWM Generating at expanded GPIO
Replies: 3
Views: 5639

Re: PWM Generating at expanded GPIO

WiFive wrote:
Sat Dec 07, 2019 1:57 am
The best way is use an expander that has a built in led driver
Thanks for your reply! Do you have any suggestion?
by Humam Helfawi
Fri Dec 06, 2019 1:06 pm
Forum: ESP-IDF
Topic: PWM Generating at expanded GPIO
Replies: 3
Views: 5639

PWM Generating at expanded GPIO

Hi, I have I2C GPIO expander. I used to generate PWM using ledc_channel_config , ledc_set_duty and ledc_update_duty at one of the original GPIOs of the ESP32. Is it possible to use those function to generate PWM at GPIO in the expander? If not, what s the best way to do this manually? I tried to sta...
by Humam Helfawi
Sat Jun 22, 2019 11:15 am
Forum: ESP-ADF
Topic: Controlling volume
Replies: 0
Views: 3238

Controlling volume

Hi,

Is there a way to control the sound volume while playing mp3 file from SD card using ESP-ADF?

P.S. I am using hte original ESP32 Wrover module not a board like ESP32-LyraT.

Thanks!
by Humam Helfawi
Thu May 23, 2019 11:00 pm
Forum: Hardware
Topic: CPU at 240 MHz
Replies: 1
Views: 3358

CPU at 240 MHz

Hi,

Are there any drawbacks for setting CPU frequency to 240 MHz other than the power consumption? For example, heating?

Thanks!
by Humam Helfawi
Fri May 03, 2019 11:58 am
Forum: ESP-IDF
Topic: Formatting SD card
Replies: 4
Views: 11981

Re: Formatting SD card

/** * @brief Configuration arguments for esp_vfs_fat_sdmmc_mount and esp_vfs_fat_spiflash_mount functions */ typedef struct { /** * If FAT partition can not be mounted, and this parameter is true, * create partition table and format the filesystem. */ bool format_if_mount_failed; int max_files; ///...
by Humam Helfawi
Tue Apr 30, 2019 10:22 am
Forum: ESP-IDF
Topic: Formatting SD card
Replies: 4
Views: 11981

Formatting SD card

Hi,

Is it possible to format an SD card as FAT32 at runtime using ESP-IDF ?

Thanks!
by Humam Helfawi
Wed Apr 03, 2019 6:39 pm
Forum: ESP-IDF
Topic: Flashing encrypted firmware for the first time after pregenerated key burned
Replies: 2
Views: 5004

Flashing encrypted firmware for the first time after pregenerated key burned

Hi, I am using pregenerated key without secure boot. I managed to do everything correctly as it was explained in the tutorial. Now, I want to create a script to flash the whole firmware(including bootloader and everything). I managed to do so except small problem: After burning the pregenerated key ...
by Humam Helfawi
Wed Feb 06, 2019 3:04 pm
Forum: Hardware
Topic: Developer kit with more than 4MB flash size
Replies: 0
Views: 2765

Developer kit with more than 4MB flash size

Hi,
Is their a developer kit with more than 4MB flash?
Thanks!