how can i correctly use sensor_vn and sensor_vp as input?
Posted: Fri Feb 15, 2019 5:36 am
Hi,
I am trying to use sensor_vn and sensor_vp as input, with values coming from an adc chip (which uses data and clock pins). I haven't added any pullup or pull down resistors. looking through the forum I have found and implemented this code. I am aware the bug about gpio39 firing where some peripheral power up. when I am using another pin everything looks fine. when I am using those 2 I get weird values. am I missing anything? what is the correct way to use those pins?
I am trying to use sensor_vn and sensor_vp as input, with values coming from an adc chip (which uses data and clock pins). I haven't added any pullup or pull down resistors. looking through the forum I have found and implemented this code. I am aware the bug about gpio39 firing where some peripheral power up. when I am using another pin everything looks fine. when I am using those 2 I get weird values. am I missing anything? what is the correct way to use those pins?
Code: Select all
#define GPIO_BIT_MASK ((1ULL<<GPIO_NUM_39) | (1ULL<<GPIO_NUM_36) )
gpio_config_t io_conf;
io_conf.intr_type = GPIO_INTR_DISABLE;
io_conf.mode = GPIO_MODE_INPUT;
io_conf.pin_bit_mask = GPIO_BIT_MASK;
io_conf.pull_down_en = GPIO_PULLDOWN_DISABLE;
io_conf.pull_up_en = GPIO_PULLUP_DISABLE;
gpio_config(&io_conf);