driver: add notes about GPIO36/39 issue (ECO 3.11) workaround

Closes IDFGH-1917 Closes #4117
espressif · Dec 7, 2020 · d890a51 · d890a51
1 parent 80e7252
commit d890a51
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/components/driver/include/driver/gpio.h b/components/driver/include/driver/gpio.h
@@ -95,9 +95,11 @@ esp_err_t gpio_set_intr_type(gpio_num_t gpio_num, gpio_int_type_t intr_type);
 /**
  * @brief  Enable GPIO module interrupt signal
  *
- * @note Please do not use the interrupt of GPIO36 and GPIO39 when using ADC.
+ * @note Please do not use the interrupt of GPIO36 and GPIO39 when using ADC or Wi-Fi with sleep mode enabled.
  *       Please refer to the comments of `adc1_get_raw`.
  *       Please refer to section 3.11 of 'ECO_and_Workarounds_for_Bugs_in_ESP32' for the description of this issue.
+ *       As a workaround, call adc_power_acquire() in the app. This will result in higher power consumption (by ~1mA),
+ *       but will remove the glitches on GPIO36 and GPIO39.
  *
  * @param  gpio_num GPIO number. If you want to enable an interrupt on e.g. GPIO16, gpio_num should be GPIO_NUM_16 (16);
  *