ESP32S2和S3 ADC采样速率的问题
ESP32S2和S3 ADC采样速率的问题
咨询一下,ESP32S2和S3中的RTC ADC和DIG ADC的最大采样速率和 ESP32的一样吗,是RTC 200KHz, DIG 2MHz吗?,我看手册上S2和S3对最大速率均未描述。
Re: ESP32S2和S3 ADC采样速率的问题
我开了一个新Task计数,DMA ADC每秒采6400次
- #include <string.h>
- #include <stdio.h>
- #include "sdkconfig.h"
- #include "esp_log.h"
- #include "freertos/FreeRTOS.h"
- #include "freertos/task.h"
- #include "freertos/semphr.h"
- #include "driver/adc.h"
- #define TIMES 256
- #define GET_UNIT(x) ((x >> 3) & 0x1)
- #define ADC_RESULT_BYTE 4
- #define ADC_CONV_LIMIT_EN 0
- #define ADC_CONV_MODE ADC_CONV_ALTER_UNIT
- #define ADC_OUTPUT_TYPE ADC_DIGI_OUTPUT_FORMAT_TYPE2
- static uint16_t adc1_chan_mask = BIT(2) | BIT(3) | BIT(4);
- static uint16_t adc2_chan_mask = BIT(0);
- static adc_channel_t channel[4] = {ADC1_CHANNEL_2, ADC1_CHANNEL_3, ADC1_CHANNEL_4, (ADC2_CHANNEL_0 | 1 << 3)};
- static const char *TAG = "ADC DMA";
- int value_channel_2[1100] = {0};
- int value_channel_3[1100] = {0};
- int value_channel_4[1100] = {0};
- int index_channel_2 = 0;
- int index_channel_3 = 0;
- int index_channel_4 = 0;
- int sum_temp = 0;
- int countNum = 0;
- static void
- continuous_adc_init(uint16_t adc1_chan_mask, uint16_t adc2_chan_mask, adc_channel_t *channel, uint8_t channel_num)
- {
- adc_digi_init_config_t adc_dma_config = {
- .max_store_buf_size = 1024,
- .conv_num_each_intr = TIMES,
- .adc1_chan_mask = adc1_chan_mask,
- .adc2_chan_mask = adc2_chan_mask,
- };
- ESP_ERROR_CHECK(adc_digi_initialize(&adc_dma_config));
- adc_digi_configuration_t dig_cfg = {
- .conv_limit_en = ADC_CONV_LIMIT_EN,
- .conv_limit_num = 250,
- .sample_freq_hz = 10 * 1000,
- .conv_mode = ADC_CONV_MODE,
- .format = ADC_OUTPUT_TYPE,
- };
- adc_digi_pattern_config_t adc_pattern[SOC_ADC_PATT_LEN_MAX] = {0};
- dig_cfg.pattern_num = channel_num;
- for (int i = 0; i < channel_num; i++)
- {
- uint8_t unit = GET_UNIT(channel[i]);
- uint8_t ch = channel[i] & 0x7;
- adc_pattern[i].atten = ADC_ATTEN_DB_11;
- adc_pattern[i].channel = ch;
- adc_pattern[i].unit = unit;
- adc_pattern[i].bit_width = SOC_ADC_DIGI_MAX_BITWIDTH;
- ESP_LOGI(TAG, "adc_pattern[%d].atten is :%x", i, adc_pattern[i].atten);
- ESP_LOGI(TAG, "adc_pattern[%d].channel is :%x", i, adc_pattern[i].channel);
- ESP_LOGI(TAG, "adc_pattern[%d].unit is :%x", i, adc_pattern[i].unit);
- }
- dig_cfg.adc_pattern = adc_pattern;
- ESP_ERROR_CHECK(adc_digi_controller_configure(&dig_cfg));
- }
- #if !CONFIG_IDF_TARGET_ESP32
- static bool check_valid_data(const adc_digi_output_data_t *data)
- {
- const unsigned int unit = data->type2.unit;
- if (unit > 2)
- return false;
- if (data->type2.channel >= SOC_ADC_CHANNEL_NUM(unit))
- return false;
- return true;
- }
- #endif
- void LOG_ADV_VALUE(int index_channel, const int *value_channel, char * LOG_TAG)
- {
- // for (int i = 0; i < index_channel; ++i)
- // { sum_temp += value_channel[i]; }
- // ESP_LOGI(LOG_TAG, "%d", (int)(sum_temp / index_channel));
- ESP_LOGI(LOG_TAG, "%d", value_channel[1]);
- sum_temp = 0;
- }
- void clearTask(void *param)
- {
- while (1)
- {
- vTaskDelay(250 / portTICK_PERIOD_MS);
- LOG_ADV_VALUE(index_channel_2, value_channel_2,"channel 2 adv value");
- LOG_ADV_VALUE(index_channel_3, value_channel_3,"channel 3 adv value");
- LOG_ADV_VALUE(index_channel_4, value_channel_4,"channel 4 adv value");
- index_channel_2 = 0;
- index_channel_3 = 0;
- index_channel_4 = 0;
- }
- }
- void countTask(void *param)
- {
- while (1)
- {
- vTaskDelay(1000 / portTICK_PERIOD_MS);
- printf("count=%d\n", countNum);
- countNum = 0;
- }
- }
- void app_main(void)
- {
- xTaskCreate(clearTask, "clearTask", 1024 * 5, NULL, 1, NULL);
- xTaskCreate(countTask, "countTask", 1024 * 5, NULL, 2, NULL);
- continuous_adc_init(adc1_chan_mask, adc2_chan_mask, channel, sizeof(channel) / sizeof(adc_channel_t));
- adc_digi_start();
- uint32_t ret_num = 0;
- uint8_t result[TIMES] = {0};
- memset(result, 0xcc, TIMES);
- while (1)
- {
- adc_digi_read_bytes(result, TIMES, &ret_num, ADC_MAX_DELAY);
- for (int i = 0; i < ret_num; i += ADC_RESULT_BYTE)
- {
- adc_digi_output_data_t *p = (void *)&result[i];
- if (check_valid_data(p))
- {
- if (((p->type2.unit + 1) == 1) || (p->type2.channel >= 2) || (p->type2.channel <= 4))
- {
- // ESP_LOGI(TAG, "Unit: %d,_Channel: %d, Value: %d", p->type2.unit + 1, p->type2.channel,
- // p->type2.data);
- countNum++;
- switch (p->type2.channel)
- {
- case 2:
- value_channel_2[index_channel_2] = p->type2.data;
- index_channel_2++;
- break;
- case 3:
- value_channel_3[index_channel_3] = p->type2.data;
- index_channel_3++;
- break;
- case 4:
- value_channel_4[index_channel_4] = p->type2.data;
- index_channel_4++;
- break;
- }
- }
- }
- }
- vTaskDelay(1);
- }
- }
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