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fix(adc): fix ESP32C6 ADC get high result after enable

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This commit is contained in:
gaoxu
2025-11-18 11:37:15 +08:00
committed by Gao Xu
parent 34587f3788
commit a12cd0bb4b
2 changed files with 10 additions and 5 deletions
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components/hal/esp32c6/include/hal/adc_ll.h
+7 -3
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@@ -8,6 +8,7 @@
#include <stdbool.h>
#include <stdlib.h>
#include "esp_attr.h"
#include "esp_rom_sys.h"
#include "soc/adc_periph.h"
#include "soc/apb_saradc_struct.h"
@@ -901,7 +902,11 @@ static inline void adc_oneshot_ll_output_invert(adc_unit_t adc_n, bool inv_en)
static inline void adc_oneshot_ll_enable(adc_unit_t adc_n)
{
HAL_ASSERT(adc_n == ADC_UNIT_1);
APB_SARADC.saradc_onetime_sample.saradc_saradc1_onetime_sample = 1;
// For ESP32C6, it need to delay 50us after enable oneshot mode to ensure the ADC channel select is stable.
if (APB_SARADC.saradc_onetime_sample.saradc_saradc1_onetime_sample == 0) {
APB_SARADC.saradc_onetime_sample.saradc_saradc1_onetime_sample = 1;
esp_rom_delay_us(50);
}
}
/**
@@ -909,8 +914,7 @@ static inline void adc_oneshot_ll_enable(adc_unit_t adc_n)
*/
static inline void adc_oneshot_ll_disable_all_unit(void)
{
APB_SARADC.saradc_onetime_sample.saradc_saradc1_onetime_sample = 0;
APB_SARADC.saradc_onetime_sample.saradc_saradc2_onetime_sample = 0;
// For ESP32C6, we keep saradc_saradc1_onetime_sample as 1 when oneshot mode.
}
/**