esp-idf/components/driver/test/adc_dma_test/test_esp32.c

133 lines
4.2 KiB
C

// Copyright 2015-2020 Espressif Systems (Shanghai) PTE LTD
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
/*
Tests for the adc device driver
*/
#include "esp_system.h"
#include "driver/adc.h"
#include "driver/dac.h"
#include "driver/rtc_io.h"
#include "driver/gpio.h"
#include "unity.h"
#include "esp_system.h"
#include "esp_event.h"
#include "esp_wifi.h"
#include "esp_log.h"
#include "nvs_flash.h"
#include "test_utils.h"
#include "esp_rom_sys.h"
#if !DISABLED_FOR_TARGETS(ESP8266, ESP32S2, ESP32S3) // This testcase for ESP32
/*
* ADC DMA testcase
*/
#include "driver/i2s.h"
//i2s number
#define EXAMPLE_I2S_NUM (0)
//i2s sample rate
#define EXAMPLE_I2S_SAMPLE_RATE (16000)
//i2s data bits
#define EXAMPLE_I2S_SAMPLE_BITS (16)
//enable display buffer for debug
#define EXAMPLE_I2S_BUF_DEBUG (0)
//I2S read buffer length
#define EXAMPLE_I2S_READ_LEN (16 * 1024)
//I2S data format
#define EXAMPLE_I2S_FORMAT (I2S_CHANNEL_FMT_RIGHT_LEFT)
//I2S channel number
#define EXAMPLE_I2S_CHANNEL_NUM ((EXAMPLE_I2S_FORMAT < I2S_CHANNEL_FMT_ONLY_RIGHT) ? (2) : (1))
//I2S built-in ADC unit
#define I2S_ADC_UNIT ADC_UNIT_1
//I2S built-in ADC channel
#define I2S_ADC_CHANNEL ADC1_CHANNEL_4
//flash record size, for recording 5 seconds' data
#define FLASH_RECORD_SIZE (EXAMPLE_I2S_CHANNEL_NUM * EXAMPLE_I2S_SAMPLE_RATE * EXAMPLE_I2S_SAMPLE_BITS / 8 * 5)
#define FLASH_ERASE_SIZE (FLASH_RECORD_SIZE % FLASH_SECTOR_SIZE == 0) ? FLASH_RECORD_SIZE : FLASH_RECORD_SIZE + (FLASH_SECTOR_SIZE - FLASH_RECORD_SIZE % FLASH_SECTOR_SIZE)
//sector size of flash
#define FLASH_SECTOR_SIZE (0x1000)
/**
* @brief I2S ADC/DAC mode init.
*/
static void example_i2s_init(void)
{
int i2s_num = EXAMPLE_I2S_NUM;
i2s_config_t i2s_config = {
.mode = I2S_MODE_MASTER | I2S_MODE_RX | I2S_MODE_TX | I2S_MODE_DAC_BUILT_IN | I2S_MODE_ADC_BUILT_IN,
.sample_rate = EXAMPLE_I2S_SAMPLE_RATE,
.bits_per_sample = EXAMPLE_I2S_SAMPLE_BITS,
.channel_format = EXAMPLE_I2S_FORMAT,
.intr_alloc_flags = 0,
.dma_buf_count = 2,
.dma_buf_len = 1024,
.use_apll = 1,
};
//install and start i2s driver
TEST_ESP_OK( i2s_driver_install(i2s_num, &i2s_config, 0, NULL) );
//init ADC pad
TEST_ESP_OK( i2s_set_adc_mode(I2S_ADC_UNIT, I2S_ADC_CHANNEL) );
}
static void example_i2s_deinit(void)
{
TEST_ESP_OK( i2s_driver_uninstall(EXAMPLE_I2S_NUM) );
}
/**
* @brief debug buffer data
*/
static void example_disp_buf(uint8_t *buf, int length)
{
printf("======\n");
for (int i = 0; i < length; i++) {
printf("%02x ", buf[i]);
if ((i + 1) % 8 == 0) {
printf("\n");
}
}
printf("======\n");
}
TEST_CASE("ADC DMA read", "[adc dma]")
{
example_i2s_init();
int i2s_read_len = EXAMPLE_I2S_READ_LEN;
int flash_wr_size = 0;
size_t bytes_read;
char *i2s_read_buff = (char *) calloc(i2s_read_len, sizeof(char));
TEST_ESP_OK( i2s_adc_enable(EXAMPLE_I2S_NUM) );
while (flash_wr_size < FLASH_RECORD_SIZE) {
//read data from I2S bus, in this case, from ADC.
TEST_ESP_OK( i2s_read(EXAMPLE_I2S_NUM, (void *) i2s_read_buff, i2s_read_len, &bytes_read, portMAX_DELAY) );
example_disp_buf((uint8_t *) i2s_read_buff, 64);
//save original data from I2S(ADC) into flash.
flash_wr_size += i2s_read_len;
esp_rom_printf("Sound recording %u%%\n", flash_wr_size * 100 / FLASH_RECORD_SIZE);
}
TEST_ESP_OK( i2s_adc_disable(EXAMPLE_I2S_NUM) );
if (i2s_read_buff) {
free(i2s_read_buff);
i2s_read_buff = NULL;
}
example_i2s_deinit();
}
#endif // !DISABLED_FOR_TARGETS(ESP8266, ESP32S2)