alex/esp-idf
alex/esp-idf
1
0
Fork 0
mirror of https://github.com/espressif/esp-idf.git synced 2024-10-05 20:47:46 -04:00
Code Issues Actions 2 Packages Projects Releases Wiki Activity
16677b0d3c
esp-idf/components/driver/esp32c3/adc.c
morris 16677b0d3c global: make periph enable/disable APIs private 
peripheral enable/disable usually should be managed by driver itself,
so make it as espressif private APIs, not recommended for user to use it
in application code.
However, if user want to re-write the driver or ports to other platform,
this is still possible by including the header in this way:
"esp_private/peripheral_ctrl.h"
2021-11-08 10:37:47 +08:00

721 lines
23 KiB
C
Raw Blame History

/*
* SPDX-FileCopyrightText: 2016-2021 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
#include <esp_types.h>
#include <stdlib.h>
#include <ctype.h>
#include <string.h>
#include "sdkconfig.h"
#include "esp_intr_alloc.h"
#include "esp_log.h"
#include "esp_pm.h"
#include "sys/lock.h"
#include "freertos/FreeRTOS.h"
#include "freertos/semphr.h"
#include "freertos/timers.h"
#include "freertos/ringbuf.h"
#include "esp32c3/rom/ets_sys.h"
#include "esp_private/periph_ctrl.h"
#include "driver/gpio.h"
#include "driver/adc.h"
#include "hal/adc_types.h"
#include "hal/adc_hal.h"
#include "hal/dma_types.h"
#include "esp_efuse_rtc_calib.h"
#include "esp_private/gdma.h"
#define ADC_CHECK_RET(fun_ret) ({ \
if (fun_ret != ESP_OK) { \
ESP_LOGE(ADC_TAG,"%s(%d)",__FUNCTION__,__LINE__); \
return ESP_FAIL; \
} \
})
static const char *ADC_TAG = "ADC";
#define ADC_CHECK(a, str, ret_val) ({ \
if (!(a)) { \
ESP_LOGE(ADC_TAG,"%s(%d) :%s", __FUNCTION__, __LINE__, str); \
return (ret_val); \
} \
})
#define ADC_GET_IO_NUM(periph, channel) (adc_channel_io_map[periph][channel])
#define ADC_CHANNEL_CHECK(periph, channel) ADC_CHECK(channel < SOC_ADC_CHANNEL_NUM(periph), "ADC"#periph" channel error", ESP_ERR_INVALID_ARG)
extern portMUX_TYPE rtc_spinlock; //TODO: Will be placed in the appropriate position after the rtc module is finished.
#define ADC_ENTER_CRITICAL() portENTER_CRITICAL(&rtc_spinlock)
#define ADC_EXIT_CRITICAL() portEXIT_CRITICAL(&rtc_spinlock)
/**
* 1. sar_adc1_lock: this mutex lock is to protect the SARADC1 module.
* 2. sar_adc2_lock: this mutex lock is to protect the SARADC2 module. On C3, it is controlled by the digital controller
* and PWDET controller.
* 3. adc_reg_lock: this spin lock is to protect the shared registers used by ADC1 / ADC2 single read mode.
*/
static _lock_t sar_adc1_lock;
#define SAR_ADC1_LOCK_ACQUIRE() _lock_acquire(&sar_adc1_lock)
#define SAR_ADC1_LOCK_RELEASE() _lock_release(&sar_adc1_lock)
static _lock_t sar_adc2_lock;
#define SAR_ADC2_LOCK_ACQUIRE() _lock_acquire(&sar_adc2_lock)
#define SAR_ADC2_LOCK_RELEASE() _lock_release(&sar_adc2_lock)
portMUX_TYPE adc_reg_lock = portMUX_INITIALIZER_UNLOCKED;
#define ADC_REG_LOCK_ENTER() portENTER_CRITICAL(&adc_reg_lock)
#define ADC_REG_LOCK_EXIT() portEXIT_CRITICAL(&adc_reg_lock)
#define INTERNAL_BUF_NUM 5
#define IN_SUC_EOF_BIT GDMA_LL_EVENT_RX_SUC_EOF
/*---------------------------------------------------------------
Digital Controller Context
---------------------------------------------------------------*/
typedef struct adc_digi_context_t {
uint8_t *rx_dma_buf; //dma buffer
adc_hal_context_t hal; //hal context
gdma_channel_handle_t rx_dma_channel; //dma rx channel handle
RingbufHandle_t ringbuf_hdl; //RX ringbuffer handler
intptr_t rx_eof_desc_addr; //eof descriptor address of RX channel
bool ringbuf_overflow_flag; //1: ringbuffer overflow
bool driver_start_flag; //1: driver is started; 0: driver is stoped
bool use_adc1; //1: ADC unit1 will be used; 0: ADC unit1 won't be used.
bool use_adc2; //1: ADC unit2 will be used; 0: ADC unit2 won't be used. This determines whether to acquire sar_adc2_mutex lock or not.
adc_atten_t adc1_atten; //Attenuation for ADC1. On this chip each ADC can only support one attenuation.
adc_atten_t adc2_atten; //Attenuation for ADC2. On this chip each ADC can only support one attenuation.
adc_digi_config_t digi_controller_config; //Digital Controller Configuration
esp_pm_lock_handle_t pm_lock; //For power management
} adc_digi_context_t;
static adc_digi_context_t *s_adc_digi_ctx = NULL;
static uint32_t adc_get_calibration_offset(adc_ll_num_t adc_n, adc_channel_t chan, adc_atten_t atten);
/*---------------------------------------------------------------
ADC Continuous Read Mode (via DMA)
---------------------------------------------------------------*/
static IRAM_ATTR bool adc_dma_in_suc_eof_callback(gdma_channel_handle_t dma_chan, gdma_event_data_t *event_data, void *user_data);
static int8_t adc_digi_get_io_num(uint8_t adc_unit, uint8_t adc_channel)
{
return adc_channel_io_map[adc_unit][adc_channel];
}
static esp_err_t adc_digi_gpio_init(adc_unit_t adc_unit, uint16_t channel_mask)
{
esp_err_t ret = ESP_OK;
uint64_t gpio_mask = 0;
uint32_t n = 0;
int8_t io = 0;
while (channel_mask) {
if (channel_mask & 0x1) {
io = adc_digi_get_io_num(adc_unit, n);
if (io < 0) {
return ESP_ERR_INVALID_ARG;
}
gpio_mask |= BIT64(io);
}
channel_mask = channel_mask >> 1;
n++;
}
gpio_config_t cfg = {
.pin_bit_mask = gpio_mask,
.mode = GPIO_MODE_DISABLE,
};
ret = gpio_config(&cfg);
return ret;
}
esp_err_t adc_digi_initialize(const adc_digi_init_config_t *init_config)
{
esp_err_t ret = ESP_OK;
s_adc_digi_ctx = calloc(1, sizeof(adc_digi_context_t));
if (s_adc_digi_ctx == NULL) {
ret = ESP_ERR_NO_MEM;
goto cleanup;
}
//ringbuffer
s_adc_digi_ctx->ringbuf_hdl = xRingbufferCreate(init_config->max_store_buf_size, RINGBUF_TYPE_BYTEBUF);
if (!s_adc_digi_ctx->ringbuf_hdl) {
ret = ESP_ERR_NO_MEM;
goto cleanup;
}
//malloc internal buffer used by DMA
s_adc_digi_ctx->rx_dma_buf = heap_caps_calloc(1, init_config->conv_num_each_intr * INTERNAL_BUF_NUM, MALLOC_CAP_INTERNAL);
if (!s_adc_digi_ctx->rx_dma_buf) {
ret = ESP_ERR_NO_MEM;
goto cleanup;
}
//malloc dma descriptor
s_adc_digi_ctx->hal.rx_desc = heap_caps_calloc(1, (sizeof(dma_descriptor_t)) * INTERNAL_BUF_NUM, MALLOC_CAP_DMA);
if (!s_adc_digi_ctx->hal.rx_desc) {
ret = ESP_ERR_NO_MEM;
goto cleanup;
}
//malloc pattern table
s_adc_digi_ctx->digi_controller_config.adc_pattern = calloc(1, SOC_ADC_PATT_LEN_MAX * sizeof(adc_digi_pattern_table_t));
if (!s_adc_digi_ctx->digi_controller_config.adc_pattern) {
ret = ESP_ERR_NO_MEM;
goto cleanup;
}
#if CONFIG_PM_ENABLE
ret = esp_pm_lock_create(ESP_PM_APB_FREQ_MAX, 0, "adc_dma", &s_adc_digi_ctx->pm_lock);
if (ret != ESP_OK) {
goto cleanup;
}
#endif //CONFIG_PM_ENABLE
//init gpio pins
if (init_config->adc1_chan_mask) {
ret = adc_digi_gpio_init(ADC_NUM_1, init_config->adc1_chan_mask);
if (ret != ESP_OK) {
goto cleanup;
}
}
if (init_config->adc2_chan_mask) {
ret = adc_digi_gpio_init(ADC_NUM_2, init_config->adc2_chan_mask);
if (ret != ESP_OK) {
goto cleanup;
}
}
//alloc rx gdma channel
gdma_channel_alloc_config_t rx_alloc_config = {
.direction = GDMA_CHANNEL_DIRECTION_RX,
};
ret = gdma_new_channel(&rx_alloc_config, &s_adc_digi_ctx->rx_dma_channel);
if (ret != ESP_OK) {
goto cleanup;
}
gdma_connect(s_adc_digi_ctx->rx_dma_channel, GDMA_MAKE_TRIGGER(GDMA_TRIG_PERIPH_ADC, 0));
gdma_strategy_config_t strategy_config = {
.auto_update_desc = true,
.owner_check = true
};
gdma_apply_strategy(s_adc_digi_ctx->rx_dma_channel, &strategy_config);
gdma_rx_event_callbacks_t cbs = {
.on_recv_eof = adc_dma_in_suc_eof_callback
};
gdma_register_rx_event_callbacks(s_adc_digi_ctx->rx_dma_channel, &cbs, s_adc_digi_ctx);
int dma_chan;
gdma_get_channel_id(s_adc_digi_ctx->rx_dma_channel, &dma_chan);
adc_hal_config_t config = {
.desc_max_num = INTERNAL_BUF_NUM,
.dma_chan = dma_chan,
.eof_num = init_config->conv_num_each_intr / ADC_HAL_DATA_LEN_PER_CONV
};
adc_hal_context_config(&s_adc_digi_ctx->hal, &config);
//enable SARADC module clock
periph_module_enable(PERIPH_SARADC_MODULE);
adc_hal_calibration_init(ADC_NUM_1);
adc_hal_calibration_init(ADC_NUM_2);
return ret;
cleanup:
adc_digi_deinitialize();
return ret;
}
static IRAM_ATTR bool adc_dma_intr(adc_digi_context_t *adc_digi_ctx);
static IRAM_ATTR bool adc_dma_in_suc_eof_callback(gdma_channel_handle_t dma_chan, gdma_event_data_t *event_data, void *user_data)
{
assert(event_data);
adc_digi_context_t *adc_digi_ctx = (adc_digi_context_t *)user_data;
adc_digi_ctx->rx_eof_desc_addr = event_data->rx_eof_desc_addr;
return adc_dma_intr(adc_digi_ctx);
}
static IRAM_ATTR bool adc_dma_intr(adc_digi_context_t *adc_digi_ctx)
{
portBASE_TYPE taskAwoken = 0;
BaseType_t ret;
adc_hal_dma_desc_status_t status = false;
dma_descriptor_t *current_desc = NULL;
while (1) {
status = adc_hal_get_reading_result(&adc_digi_ctx->hal, adc_digi_ctx->rx_eof_desc_addr, &current_desc);
if (status != ADC_HAL_DMA_DESC_VALID) {
break;
}
ret = xRingbufferSendFromISR(adc_digi_ctx->ringbuf_hdl, current_desc->buffer, current_desc->dw0.length, &taskAwoken);
if (ret == pdFALSE) {
//ringbuffer overflow
adc_digi_ctx->ringbuf_overflow_flag = 1;
}
}
if (status == ADC_HAL_DMA_DESC_NULL) {
//start next turns of dma operation
adc_hal_digi_rxdma_start(&adc_digi_ctx->hal, adc_digi_ctx->rx_dma_buf);
}
return (taskAwoken == pdTRUE);
}
esp_err_t adc_digi_start(void)
{
if (s_adc_digi_ctx->driver_start_flag != 0) {
ESP_LOGE(ADC_TAG, "The driver is already started");
return ESP_ERR_INVALID_STATE;
}
adc_power_acquire();
//reset flags
s_adc_digi_ctx->ringbuf_overflow_flag = 0;
s_adc_digi_ctx->driver_start_flag = 1;
if (s_adc_digi_ctx->use_adc1) {
SAR_ADC1_LOCK_ACQUIRE();
}
if (s_adc_digi_ctx->use_adc2) {
SAR_ADC2_LOCK_ACQUIRE();
}
#if CONFIG_PM_ENABLE
// Lock APB frequency while ADC driver is in use
esp_pm_lock_acquire(s_adc_digi_ctx->pm_lock);
#endif
adc_arbiter_t config = ADC_ARBITER_CONFIG_DEFAULT();
if (s_adc_digi_ctx->use_adc1) {
uint32_t cal_val = adc_get_calibration_offset(ADC_NUM_1, ADC_CHANNEL_MAX, s_adc_digi_ctx->adc1_atten);
adc_hal_set_calibration_param(ADC_NUM_1, cal_val);
}
if (s_adc_digi_ctx->use_adc2) {
uint32_t cal_val = adc_get_calibration_offset(ADC_NUM_2, ADC_CHANNEL_MAX, s_adc_digi_ctx->adc2_atten);
adc_hal_set_calibration_param(ADC_NUM_2, cal_val);
}
adc_hal_init();
adc_hal_arbiter_config(&config);
adc_hal_digi_init(&s_adc_digi_ctx->hal);
adc_hal_digi_controller_config(&s_adc_digi_ctx->digi_controller_config);
//reset ADC and DMA
adc_hal_fifo_reset(&s_adc_digi_ctx->hal);
//start DMA
adc_hal_digi_rxdma_start(&s_adc_digi_ctx->hal, s_adc_digi_ctx->rx_dma_buf);
//start ADC
adc_hal_digi_start(&s_adc_digi_ctx->hal);
return ESP_OK;
}
esp_err_t adc_digi_stop(void)
{
if (s_adc_digi_ctx->driver_start_flag != 1) {
ESP_LOGE(ADC_TAG, "The driver is already stopped");
return ESP_ERR_INVALID_STATE;
}
s_adc_digi_ctx->driver_start_flag = 0;
//disable the in suc eof intrrupt
adc_hal_digi_dis_intr(&s_adc_digi_ctx->hal, IN_SUC_EOF_BIT);
//clear the in suc eof interrupt
adc_hal_digi_clr_intr(&s_adc_digi_ctx->hal, IN_SUC_EOF_BIT);
//stop ADC
adc_hal_digi_stop(&s_adc_digi_ctx->hal);
//stop DMA
adc_hal_digi_rxdma_stop(&s_adc_digi_ctx->hal);
adc_hal_digi_deinit();
#if CONFIG_PM_ENABLE
if (s_adc_digi_ctx->pm_lock) {
esp_pm_lock_release(s_adc_digi_ctx->pm_lock);
}
#endif //CONFIG_PM_ENABLE
if (s_adc_digi_ctx->use_adc1) {
SAR_ADC1_LOCK_RELEASE();
}
if (s_adc_digi_ctx->use_adc2) {
SAR_ADC2_LOCK_RELEASE();
}
adc_power_release();
return ESP_OK;
}
esp_err_t adc_digi_read_bytes(uint8_t *buf, uint32_t length_max, uint32_t *out_length, uint32_t timeout_ms)
{
TickType_t ticks_to_wait;
esp_err_t ret = ESP_OK;
uint8_t *data = NULL;
size_t size = 0;
ticks_to_wait = timeout_ms / portTICK_RATE_MS;
if (timeout_ms == ADC_MAX_DELAY) {
ticks_to_wait = portMAX_DELAY;
}
data = xRingbufferReceiveUpTo(s_adc_digi_ctx->ringbuf_hdl, &size, ticks_to_wait, length_max);
if (!data) {
ESP_LOGV(ADC_TAG, "No data, increase timeout or reduce conv_num_each_intr");
ret = ESP_ERR_TIMEOUT;
*out_length = 0;
return ret;
}
memcpy(buf, data, size);
vRingbufferReturnItem(s_adc_digi_ctx->ringbuf_hdl, data);
assert((size % 4) == 0);
*out_length = size;
if (s_adc_digi_ctx->ringbuf_overflow_flag) {
ret = ESP_ERR_INVALID_STATE;
}
return ret;
}
esp_err_t adc_digi_deinitialize(void)
{
if (!s_adc_digi_ctx) {
return ESP_ERR_INVALID_STATE;
}
if (s_adc_digi_ctx->driver_start_flag != 0) {
ESP_LOGE(ADC_TAG, "The driver is not stopped");
return ESP_ERR_INVALID_STATE;
}
if (s_adc_digi_ctx->ringbuf_hdl) {
vRingbufferDelete(s_adc_digi_ctx->ringbuf_hdl);
s_adc_digi_ctx->ringbuf_hdl = NULL;
}
#if CONFIG_PM_ENABLE
if (s_adc_digi_ctx->pm_lock) {
esp_pm_lock_delete(s_adc_digi_ctx->pm_lock);
}
#endif //CONFIG_PM_ENABLE
free(s_adc_digi_ctx->rx_dma_buf);
free(s_adc_digi_ctx->hal.rx_desc);
free(s_adc_digi_ctx->digi_controller_config.adc_pattern);
gdma_disconnect(s_adc_digi_ctx->rx_dma_channel);
gdma_del_channel(s_adc_digi_ctx->rx_dma_channel);
free(s_adc_digi_ctx);
s_adc_digi_ctx = NULL;
periph_module_disable(PERIPH_SARADC_MODULE);
return ESP_OK;
}
/*---------------------------------------------------------------
ADC Single Read Mode
---------------------------------------------------------------*/
static adc_atten_t s_atten1_single[ADC1_CHANNEL_MAX]; //Array saving attenuate of each channel of ADC1, used by single read API
static adc_atten_t s_atten2_single[ADC2_CHANNEL_MAX]; //Array saving attenuate of each channel of ADC2, used by single read API
esp_err_t adc_vref_to_gpio(adc_unit_t adc_unit, gpio_num_t gpio)
{
esp_err_t ret;
uint32_t channel = ADC2_CHANNEL_MAX;
if (adc_unit == ADC_UNIT_2) {
for (int i = 0; i < ADC2_CHANNEL_MAX; i++) {
if (gpio == ADC_GET_IO_NUM(ADC_NUM_2, i)) {
channel = i;
break;
}
}
if (channel == ADC2_CHANNEL_MAX) {
return ESP_ERR_INVALID_ARG;
}
}
adc_power_acquire();
if (adc_unit & ADC_UNIT_1) {
ADC_ENTER_CRITICAL();
adc_hal_vref_output(ADC_NUM_1, channel, true);
ADC_EXIT_CRITICAL();
} else if (adc_unit & ADC_UNIT_2) {
ADC_ENTER_CRITICAL();
adc_hal_vref_output(ADC_NUM_2, channel, true);
ADC_EXIT_CRITICAL();
}
ret = adc_digi_gpio_init(ADC_NUM_2, BIT(channel));
return ret;
}
esp_err_t adc1_config_width(adc_bits_width_t width_bit)
{
//On ESP32C3, the data width is always 12-bits.
if (width_bit != ADC_WIDTH_BIT_12) {
return ESP_ERR_INVALID_ARG;
}
return ESP_OK;
}
esp_err_t adc1_config_channel_atten(adc1_channel_t channel, adc_atten_t atten)
{
ADC_CHANNEL_CHECK(ADC_NUM_1, channel);
ADC_CHECK(atten < ADC_ATTEN_MAX, "ADC Atten Err", ESP_ERR_INVALID_ARG);
esp_err_t ret = ESP_OK;
s_atten1_single[channel] = atten;
ret = adc_digi_gpio_init(ADC_NUM_1, BIT(channel));
adc_hal_calibration_init(ADC_NUM_1);
return ret;
}
int adc1_get_raw(adc1_channel_t channel)
{
int raw_out = 0;
periph_module_enable(PERIPH_SARADC_MODULE);
adc_power_acquire();
SAR_ADC1_LOCK_ACQUIRE();
adc_atten_t atten = s_atten1_single[channel];
uint32_t cal_val = adc_get_calibration_offset(ADC_NUM_1, channel, atten);
adc_hal_set_calibration_param(ADC_NUM_1, cal_val);
ADC_REG_LOCK_ENTER();
adc_hal_set_atten(ADC_NUM_2, channel, atten);
adc_hal_convert(ADC_NUM_1, channel, &raw_out);
ADC_REG_LOCK_EXIT();
SAR_ADC1_LOCK_RELEASE();
adc_power_release();
periph_module_disable(PERIPH_SARADC_MODULE);
return raw_out;
}
esp_err_t adc2_config_channel_atten(adc2_channel_t channel, adc_atten_t atten)
{
ADC_CHANNEL_CHECK(ADC_NUM_2, channel);
ADC_CHECK(atten <= ADC_ATTEN_11db, "ADC2 Atten Err", ESP_ERR_INVALID_ARG);
esp_err_t ret = ESP_OK;
s_atten2_single[channel] = atten;
ret = adc_digi_gpio_init(ADC_NUM_2, BIT(channel));
adc_hal_calibration_init(ADC_NUM_2);
return ret;
}
esp_err_t adc2_get_raw(adc2_channel_t channel, adc_bits_width_t width_bit, int *raw_out)
{
//On ESP32C3, the data width is always 12-bits.
if (width_bit != ADC_WIDTH_BIT_12) {
return ESP_ERR_INVALID_ARG;
}
esp_err_t ret = ESP_OK;
periph_module_enable(PERIPH_SARADC_MODULE);
adc_power_acquire();
SAR_ADC2_LOCK_ACQUIRE();
adc_arbiter_t config = ADC_ARBITER_CONFIG_DEFAULT();
adc_hal_arbiter_config(&config);
adc_atten_t atten = s_atten2_single[channel];
uint32_t cal_val = adc_get_calibration_offset(ADC_NUM_2, channel, atten);
adc_hal_set_calibration_param(ADC_NUM_2, cal_val);
ADC_REG_LOCK_ENTER();
adc_hal_set_atten(ADC_NUM_2, channel, atten);
ret = adc_hal_convert(ADC_NUM_2, channel, raw_out);
ADC_REG_LOCK_EXIT();
SAR_ADC2_LOCK_RELEASE();
adc_power_release();
periph_module_disable(PERIPH_SARADC_MODULE);
return ret;
}
/*---------------------------------------------------------------
Digital controller setting
---------------------------------------------------------------*/
esp_err_t adc_digi_controller_config(const adc_digi_config_t *config)
{
if (!s_adc_digi_ctx) {
return ESP_ERR_INVALID_STATE;
}
ADC_CHECK(config->sample_freq_hz <= SOC_ADC_SAMPLE_FREQ_THRES_HIGH && config->sample_freq_hz >= SOC_ADC_SAMPLE_FREQ_THRES_LOW, "ADC sampling frequency out of range", ESP_ERR_INVALID_ARG);
s_adc_digi_ctx->digi_controller_config.conv_limit_en = config->conv_limit_en;
s_adc_digi_ctx->digi_controller_config.conv_limit_num = config->conv_limit_num;
s_adc_digi_ctx->digi_controller_config.adc_pattern_len = config->adc_pattern_len;
s_adc_digi_ctx->digi_controller_config.sample_freq_hz = config->sample_freq_hz;
memcpy(s_adc_digi_ctx->digi_controller_config.adc_pattern, config->adc_pattern, config->adc_pattern_len * sizeof(adc_digi_pattern_table_t));
const int atten_uninitialised = 999;
s_adc_digi_ctx->adc1_atten = atten_uninitialised;
s_adc_digi_ctx->adc2_atten = atten_uninitialised;
s_adc_digi_ctx->use_adc1 = 0;
s_adc_digi_ctx->use_adc2 = 0;
for (int i = 0; i < config->adc_pattern_len; i++) {
const adc_digi_pattern_table_t *pat = &config->adc_pattern[i];
if (pat->unit == ADC_NUM_1) {
s_adc_digi_ctx->use_adc1 = 1;
if (s_adc_digi_ctx->adc1_atten == atten_uninitialised) {
s_adc_digi_ctx->adc1_atten = pat->atten;
} else if (s_adc_digi_ctx->adc1_atten != pat->atten) {
return ESP_ERR_INVALID_ARG;
}
} else if (pat->unit == ADC_NUM_2) {
//See whether ADC2 will be used or not. If yes, the ``sar_adc2_mutex`` should be acquired in the continuous read driver
s_adc_digi_ctx->use_adc2 = 1;
if (s_adc_digi_ctx->adc2_atten == atten_uninitialised) {
s_adc_digi_ctx->adc2_atten = pat->atten;
} else if (s_adc_digi_ctx->adc2_atten != pat->atten) {
return ESP_ERR_INVALID_ARG;
}
}
}
return ESP_OK;
}
/*************************************/
/* Digital controller filter setting */
/*************************************/
esp_err_t adc_digi_filter_reset(adc_digi_filter_idx_t idx)
{
ADC_ENTER_CRITICAL();
adc_hal_digi_filter_reset(idx);
ADC_EXIT_CRITICAL();
return ESP_OK;
}
esp_err_t adc_digi_filter_set_config(adc_digi_filter_idx_t idx, adc_digi_filter_t *config)
{
ADC_ENTER_CRITICAL();
adc_hal_digi_filter_set_factor(idx, config);
ADC_EXIT_CRITICAL();
return ESP_OK;
}
esp_err_t adc_digi_filter_get_config(adc_digi_filter_idx_t idx, adc_digi_filter_t *config)
{
ADC_ENTER_CRITICAL();
adc_hal_digi_filter_get_factor(idx, config);
ADC_EXIT_CRITICAL();
return ESP_OK;
}
esp_err_t adc_digi_filter_enable(adc_digi_filter_idx_t idx, bool enable)
{
ADC_ENTER_CRITICAL();
adc_hal_digi_filter_enable(idx, enable);
ADC_EXIT_CRITICAL();
return ESP_OK;
}
/**************************************/
/* Digital controller monitor setting */
/**************************************/
esp_err_t adc_digi_monitor_set_config(adc_digi_monitor_idx_t idx, adc_digi_monitor_t *config)
{
ADC_ENTER_CRITICAL();
adc_hal_digi_monitor_config(idx, config);
ADC_EXIT_CRITICAL();
return ESP_OK;
}
esp_err_t adc_digi_monitor_enable(adc_digi_monitor_idx_t idx, bool enable)
{
ADC_ENTER_CRITICAL();
adc_hal_digi_monitor_enable(idx, enable);
ADC_EXIT_CRITICAL();
return ESP_OK;
}
/*---------------------------------------------------------------
RTC controller setting
---------------------------------------------------------------*/
static uint16_t s_adc_cali_param[ADC_UNIT_MAX][ADC_ATTEN_MAX] = {};
//NOTE: according to calibration version, different types of lock may be taken during the process:
// 1. Semaphore when reading efuse
// 2. Lock (Spinlock, or Mutex) if we actually do ADC calibration in the future
//This function shoudn't be called inside critical section or ISR
static uint32_t adc_get_calibration_offset(adc_ll_num_t adc_n, adc_channel_t channel, adc_atten_t atten)
{
const bool no_cal = false;
if (s_adc_cali_param[adc_n][atten]) {
return (uint32_t)s_adc_cali_param[adc_n][atten];
}
if (no_cal) {
return 0; //indicating failure
}
// check if we can fetch the values from eFuse.
int version = esp_efuse_rtc_calib_get_ver();
uint32_t init_code = 0;
if (version == 1) {
//for calibration v1, both ADC units use the same init code (calibrated by ADC1)
init_code = esp_efuse_rtc_calib_get_init_code(version, atten);
ESP_LOGD(ADC_TAG, "Calib(V%d) ADC0, 1 atten=%d: %04X", version, atten, init_code);
s_adc_cali_param[0][atten] = init_code;
s_adc_cali_param[1][atten] = init_code;
} else {
adc_power_acquire();
ADC_ENTER_CRITICAL();
const bool internal_gnd = true;
init_code = adc_hal_self_calibration(adc_n, channel, atten, internal_gnd);
ADC_EXIT_CRITICAL();
adc_power_release();
ESP_LOGD(ADC_TAG, "Calib(V%d) ADC%d atten=%d: %04X", version, adc_n, atten, init_code);
s_adc_cali_param[adc_n][atten] = init_code;
}
return init_code;
}
// Internal function to calibrate PWDET for WiFi
esp_err_t adc_cal_offset(adc_ll_num_t adc_n, adc_channel_t channel, adc_atten_t atten)
{
adc_hal_calibration_init(adc_n);
uint32_t cal_val = adc_get_calibration_offset(adc_n, channel, atten);
ADC_ENTER_CRITICAL();
adc_hal_set_calibration_param(adc_n, cal_val);
ADC_EXIT_CRITICAL();
return ESP_OK;
}
Reference in New Issue View Git Blame Copy Permalink