esp-idf_v4.4.2 软复位有概率导致i2s adc工作不正常
Posted: Tue Jun 13, 2023 8:14 am
产品采用i2s adc+dma来采集周期性的模拟信号,程序在上电启动后即对其进行初始化:
同时产品具有软件重启的功能,某些情况下将调用esp_restart();
经过测试,esp_restart()重启后,有一定的概率出现i2s adc读出的值一直为0,此现象将一直持续,置到esp32通过硬件复位,期间无论触发多少次esp_restart()重启也无法恢复。
Code: Select all
esp_err_t err;
i2s_config_t i2s_config = {
.mode = I2S_MODE_MASTER | I2S_MODE_RX | I2S_MODE_TX | I2S_MODE_ADC_BUILT_IN,
.sample_rate = I2S_SAMPLE_RATE,
.bits_per_sample = I2S_SAMPLE_BITS,
.communication_format = I2S_COMM_FORMAT_STAND_MSB,
.channel_format = I2S_CHANNEL_FMT_RIGHT_LEFT,
.intr_alloc_flags = 0,
.dma_buf_count = 2,
.dma_buf_len = 1024,
.use_apll = 1,
};
//install and start i2s driver
err = i2s_driver_install(I2S_NUM, &i2s_config, 0, NULL);
ESP_LOGI("load", "init step 1: %d", err);
vTaskDelay(2000 / portTICK_RATE_MS);
err = i2s_set_adc_mode(I2S_ADC_UNIT, I2S_ADC_CHANNEL);
ESP_LOGI("load", "init step 2: %d", err);
err = i2s_adc_enable(I2S_NUM);
ESP_LOGI("load", "init step 3: %d", err);
经过测试,esp_restart()重启后,有一定的概率出现i2s adc读出的值一直为0,此现象将一直持续,置到esp32通过硬件复位,期间无论触发多少次esp_restart()重启也无法恢复。