diff options
| -rw-r--r-- | ports/esp32/machine_adc.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/ports/esp32/machine_adc.c b/ports/esp32/machine_adc.c index 2f276836f..dc21b6908 100644 --- a/ports/esp32/machine_adc.c +++ b/ports/esp32/machine_adc.c @@ -148,11 +148,13 @@ static void mp_machine_adc_print(const mp_print_t *print, mp_obj_t self_in, mp_p } static void madc_atten_helper(const machine_adc_obj_t *self, mp_int_t atten) { - esp_err_t err; + esp_err_t err = ESP_FAIL; if (self->block->unit_id == ADC_UNIT_1) { err = adc1_config_channel_atten(self->channel_id, atten); } else { + #if SOC_ADC_PERIPH_NUM >= 2 err = adc2_config_channel_atten(self->channel_id, atten); + #endif } if (err != ESP_OK) { mp_raise_ValueError(MP_ERROR_TEXT("invalid atten")); |