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adc: no longer support adc2 continuous mode on esp32c3 and esp32s3

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Due to HW limitation, we don't support this anymore. On s3 and c3, ADC2 under continuous  mode is not stable.

However, you can enable CONFIG_ADC_CONTINUOUS_FORCE_USE_ADC2_ON_C3_S3 to force use
ADC2.

Refer to errata to know more details:
https://www.espressif.com/sites/default/files/documentation/esp32-s3_errata_en.pdf
https://www.espressif.com/sites/default/files/documentation/esp32-c3_errata_en.pdf
This commit is contained in:
Armando
2022-12-12 11:00:47 +08:00
committed by morris
parent 6aa7091199
commit b4c90c44d2
4 changed files with 66 additions and 53 deletions
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21
components/esp_adc/adc_continuous.c
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@@ -530,16 +530,27 @@ esp_err_t adc_continuous_config(adc_continuous_handle_t handle, const adc_contin
//Pattern related check
ESP_RETURN_ON_FALSE(config->pattern_num <= SOC_ADC_PATT_LEN_MAX, ESP_ERR_INVALID_ARG, ADC_TAG, "Max pattern num is %d", SOC_ADC_PATT_LEN_MAX);
#if CONFIG_IDF_TARGET_ESP32
for (int i = 0; i < config->pattern_num; i++) {
ESP_RETURN_ON_FALSE((config->adc_pattern[i].bit_width >= SOC_ADC_DIGI_MIN_BITWIDTH && config->adc_pattern->bit_width <= SOC_ADC_DIGI_MAX_BITWIDTH), ESP_ERR_INVALID_ARG, ADC_TAG, "ADC bitwidth not supported");
ESP_RETURN_ON_FALSE(config->adc_pattern[i].unit == 0, ESP_ERR_INVALID_ARG, ADC_TAG, "Only support using ADC1 DMA mode");
}
#else
for (int i = 0; i < config->pattern_num; i++) {
ESP_RETURN_ON_FALSE((config->adc_pattern[i].bit_width == SOC_ADC_DIGI_MAX_BITWIDTH), ESP_ERR_INVALID_ARG, ADC_TAG, "ADC bitwidth not supported");
#if CONFIG_IDF_TARGET_ESP32C3 || CONFIG_IDF_TARGET_ESP32S3
//we add this error log to hint users what happened
if (SOC_ADC_DIG_SUPPORTED_UNIT(config->adc_pattern[i].unit) == 0) {
ESP_LOGE(ADC_TAG, "ADC2 continuous mode is no longer supported, please use ADC1. Search for errata on espressif website for more details. You can enable CONFIG_ADC_CONTINUOUS_FORCE_USE_ADC2_ON_C3_S3 to force use ADC2");
}
#endif //CONFIG_IDF_TARGET_ESP32C3 || CONFIG_IDF_TARGET_ESP32S3
#if !CONFIG_ADC_CONTINUOUS_FORCE_USE_ADC2_ON_C3_S3
/**
* On all continuous mode supported chips, we will always check the unit to see if it's a continuous mode supported unit.
* However, on ESP32C3 and ESP32S3, we will jump this check, if `CONFIG_ADC_CONTINUOUS_FORCE_USE_ADC2_ON_C3_S3` is enabled.
*/
ESP_RETURN_ON_FALSE(SOC_ADC_DIG_SUPPORTED_UNIT(config->adc_pattern[i].unit), ESP_ERR_INVALID_ARG, ADC_TAG, "Only support using ADC1 DMA mode");
#endif //#if !CONFIG_ADC_CONTINUOUS_FORCE_USE_ADC2_ON_C3_S3
}
#endif
ESP_RETURN_ON_FALSE(config->sample_freq_hz <= SOC_ADC_SAMPLE_FREQ_THRES_HIGH && config->sample_freq_hz >= SOC_ADC_SAMPLE_FREQ_THRES_LOW, ESP_ERR_INVALID_ARG, ADC_TAG, "ADC sampling frequency out of range");
#if CONFIG_IDF_TARGET_ESP32