mirror of
https://github.com/espressif/esp-idf.git
synced 2024-10-05 20:47:46 -04:00
109 lines
3.5 KiB
C
109 lines
3.5 KiB
C
/*
|
|
* SPDX-FileCopyrightText: 2019-2022 Espressif Systems (Shanghai) CO LTD
|
|
*
|
|
* SPDX-License-Identifier: Apache-2.0
|
|
*/
|
|
|
|
#include <esp_types.h>
|
|
#include "sdkconfig.h"
|
|
#include "esp_log.h"
|
|
#include "esp_check.h"
|
|
#include "freertos/FreeRTOS.h"
|
|
#include "esp_private/periph_ctrl.h"
|
|
#include "esp_private/adc_private.h"
|
|
#include "esp_private/adc_share_hw_ctrl.h"
|
|
#include "driver/gpio.h"
|
|
#include "hal/adc_hal.h"
|
|
#include "hal/adc_hal_common.h"
|
|
#include "soc/adc_periph.h"
|
|
|
|
|
|
static const char *TAG = "adc_common";
|
|
static portMUX_TYPE s_spinlock = portMUX_INITIALIZER_UNLOCKED;
|
|
extern portMUX_TYPE rtc_spinlock;
|
|
|
|
/*------------------------------------------------------------------------------
|
|
* For those who use APB_SARADC periph
|
|
*----------------------------------------------------------------------------*/
|
|
static int s_adc_digi_ctrlr_cnt;
|
|
|
|
void adc_apb_periph_claim(void)
|
|
{
|
|
portENTER_CRITICAL(&s_spinlock);
|
|
s_adc_digi_ctrlr_cnt++;
|
|
if (s_adc_digi_ctrlr_cnt == 1) {
|
|
//enable ADC digital part
|
|
periph_module_enable(PERIPH_SARADC_MODULE);
|
|
//reset ADC digital part
|
|
periph_module_reset(PERIPH_SARADC_MODULE);
|
|
}
|
|
|
|
portEXIT_CRITICAL(&s_spinlock);
|
|
}
|
|
|
|
void adc_apb_periph_free(void)
|
|
{
|
|
portENTER_CRITICAL(&s_spinlock);
|
|
s_adc_digi_ctrlr_cnt--;
|
|
if (s_adc_digi_ctrlr_cnt == 0) {
|
|
periph_module_disable(PERIPH_SARADC_MODULE);
|
|
} else if (s_adc_digi_ctrlr_cnt < 0) {
|
|
portEXIT_CRITICAL(&s_spinlock);
|
|
ESP_LOGE(TAG, "%s called, but `s_adc_digi_ctrlr_cnt == 0`", __func__);
|
|
abort();
|
|
}
|
|
|
|
portEXIT_CRITICAL(&s_spinlock);
|
|
}
|
|
|
|
/*---------------------------------------------------------------
|
|
ADC IOs
|
|
---------------------------------------------------------------*/
|
|
esp_err_t adc_io_to_channel(int io_num, adc_unit_t *unit_id, adc_channel_t *channel)
|
|
{
|
|
ESP_RETURN_ON_FALSE(GPIO_IS_VALID_GPIO(io_num), ESP_ERR_INVALID_ARG, TAG, "invalid gpio number");
|
|
ESP_RETURN_ON_FALSE(unit_id && channel, ESP_ERR_INVALID_ARG, TAG, "invalid argument: null pointer");
|
|
|
|
bool found = false;
|
|
for (int i = 0; i < SOC_ADC_PERIPH_NUM; i++) {
|
|
for (int j = 0; j < SOC_ADC_MAX_CHANNEL_NUM; j++) {
|
|
if (adc_channel_io_map[i][j] == io_num) {
|
|
*channel = j;
|
|
*unit_id = i;
|
|
found = true;
|
|
}
|
|
}
|
|
}
|
|
return (found) ? ESP_OK : ESP_ERR_NOT_FOUND;
|
|
}
|
|
|
|
esp_err_t adc_channel_to_io(adc_unit_t unit_id, adc_channel_t channel, int *io_num)
|
|
{
|
|
ESP_RETURN_ON_FALSE(unit_id < SOC_ADC_PERIPH_NUM, ESP_ERR_INVALID_ARG, TAG, "invalid unit");
|
|
ESP_RETURN_ON_FALSE(channel < SOC_ADC_CHANNEL_NUM(unit_id), ESP_ERR_INVALID_ARG, TAG, "invalid channel");
|
|
ESP_RETURN_ON_FALSE(io_num, ESP_ERR_INVALID_ARG, TAG, "invalid argument: null pointer");
|
|
|
|
*io_num = adc_channel_io_map[unit_id][channel];
|
|
return ESP_OK;
|
|
}
|
|
|
|
#if SOC_ADC_CALIBRATION_V1_SUPPORTED
|
|
/*---------------------------------------------------------------
|
|
ADC Hardware Calibration
|
|
---------------------------------------------------------------*/
|
|
static __attribute__((constructor)) void adc_hw_calibration(void)
|
|
{
|
|
//Calculate all ICode
|
|
for (int i = 0; i < SOC_ADC_PERIPH_NUM; i++) {
|
|
adc_hal_calibration_init(i);
|
|
for (int j = 0; j < SOC_ADC_ATTEN_NUM; j++) {
|
|
/**
|
|
* This may get wrong when attenuations are NOT consecutive on some chips,
|
|
* update this when bringing up the calibration on that chip
|
|
*/
|
|
adc_calc_hw_calibration_code(i, j);
|
|
}
|
|
}
|
|
}
|
|
#endif //#if SOC_ADC_CALIBRATION_V1_SUPPORTED
|