alex/esp-idf
1
0
Fork 0
mirror of https://github.com/espressif/esp-idf.git synced 2025-11-08 15:32:58 +00:00
Code Issues Packages Projects Releases Wiki Activity

adc: support adc self-calibration on esp32s3

Browse Source
This commit is contained in:
Armando
2021-09-15 12:18:38 +08:00
parent 6704f4c92f
commit ddd0235783
5 changed files with 55 additions and 15 deletions
Download Patch File Download Diff File Expand all files Collapse all files

38
components/hal/esp32s3/include/hal/adc_ll.h
View File

@@ -129,8 +129,12 @@ static inline void adc_ll_digi_set_fsm_time(uint32_t rst_wait, uint32_t start_wa
*/
static inline void adc_ll_set_sample_cycle(uint32_t sample_cycle)
{
//To be added including RTC_CNTR reg and functions
abort();
/* Should be called before writing I2C registers. */
SET_PERI_REG_MASK(RTC_CNTL_ANA_CONF_REG, RTC_CNTL_SAR_I2C_PU_M);
CLEAR_PERI_REG_MASK(ANA_CONFIG_REG, I2C_SAR_M);
SET_PERI_REG_MASK(ANA_CONFIG2_REG, ANA_SAR_CFG2_M);
REGI2C_WRITE_MASK(I2C_SAR_ADC, ADC_SAR1_SAMPLE_CYCLE_ADDR, sample_cycle);
}
/**
@@ -720,16 +724,32 @@ static inline void adc_ll_calibration_init(adc_ll_num_t adc_n)
/**
* Configure the registers for ADC calibration. You need to call the ``adc_ll_calibration_finish`` interface to resume after calibration.
*
* @note Different ADC units and different attenuation options use different calibration data (initial data).
*
* @param adc_n ADC index number.
* @param channel adc channel number.
* @param channel Not used
* @param internal_gnd true: Disconnect from the IO port and use the internal GND as the calibration voltage.
* false: Use IO external voltage as calibration voltage.
*/
static inline void adc_ll_calibration_prepare(adc_ll_num_t adc_n, adc_channel_t channel, bool internal_gnd)
{
abort();
/* Should be called before writing I2C registers. */
SET_PERI_REG_MASK(RTC_CNTL_ANA_CONF_REG, RTC_CNTL_SAR_I2C_PU_M);
CLEAR_PERI_REG_MASK(ANA_CONFIG_REG, I2C_SAR_M);
SET_PERI_REG_MASK(ANA_CONFIG2_REG, ANA_SAR_CFG2_M);
/* Enable/disable internal connect GND (for calibration). */
if (adc_n == ADC_NUM_1) {
if (internal_gnd) {
REGI2C_WRITE_MASK(I2C_SAR_ADC, ADC_SAR1_ENCAL_GND_ADDR, 1);
} else {
REGI2C_WRITE_MASK(I2C_SAR_ADC, ADC_SAR1_ENCAL_GND_ADDR, 0);
}
} else { //adc_n == ADC_NUM_2
if (internal_gnd) {
REGI2C_WRITE_MASK(I2C_SAR_ADC, ADC_SAR2_ENCAL_GND_ADDR, 1);
} else {
REGI2C_WRITE_MASK(I2C_SAR_ADC, ADC_SAR2_ENCAL_GND_ADDR, 0);
}
}
}
/**
@@ -739,7 +759,11 @@ static inline void adc_ll_calibration_prepare(adc_ll_num_t adc_n, adc_channel_t
*/
static inline void adc_ll_calibration_finish(adc_ll_num_t adc_n)
{
abort();
if (adc_n == ADC_NUM_1) {
REGI2C_WRITE_MASK(I2C_SAR_ADC, ADC_SAR1_ENCAL_GND_ADDR, 0);
} else { //adc_n == ADC_NUM_2
REGI2C_WRITE_MASK(I2C_SAR_ADC, ADC_SAR2_ENCAL_GND_ADDR, 0);
}
}
/**