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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
2022-12-16 11:36:51 +08:00
parent f311bbdcf9
commit ffb2db586a
4 changed files with 77 additions and 52 deletions
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11
components/driver/Kconfig
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@@ -19,6 +19,17 @@ menu "Driver configurations"
For testing, disable this option so that we can measure the output of DAC by internal ADC.
config ADC_CONTINUOUS_FORCE_USE_ADC2_ON_C3_S3
depends on IDF_TARGET_ESP32C3 || IDF_TARGET_ESP32S3
bool "Force use ADC2 continumous mode on ESP32S3 or ESP32C3"
default n
help
On ESP32C3 and ESP32S3, ADC2 Digital Controller is not stable. Therefore,
ADC2 continuous mode is not suggested on ESP32S3 and ESP32C3
If you stick to this, you can enable this option to force use ADC2 under above conditions.
For more details, you can search for errata on espressif website.
endmenu # ADC Configuration
menu "MCPWM configuration"

15
components/driver/adc.c
View File

@@ -569,8 +569,21 @@ esp_err_t adc_digi_controller_configure(const adc_digi_configuration_t *config)
#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
#endif //#if CONFIG_IDF_TARGET_ESP32
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
ESP_RETURN_ON_FALSE(config->conv_limit_en == 1, ESP_ERR_INVALID_ARG, ADC_TAG, "`conv_limit_en` should be set to 1");