编写读取数据的测试代码
修改main函数如下：
- int main(void)
- {
- /* USER CODE BEGIN 1 */
- uint16_t i = 0;
- uint16_t adc_value = 0;
- float vol = 0.0;
- /* USER CODE END 1 */
- HAL_Init();
- SystemClock_Config();
- MX_GPIO_Init();
- MX_DAC1_Init();
- MX_USART1_UART_Init();
- MX_ADC1_Init();
- /* USER CODE BEGIN 2 */
- printf("DAC Test...\r\n");
- HAL_DAC_Start(&hdac1, DAC_CHANNEL_2);
- /* USER CODE END 2 */
- /* Infinite loop */
- /* USER CODE BEGIN WHILE */
- while (1)
- {
- /* USER CODE END WHILE */
- /* USER CODE BEGIN 3 */
- for(i = 0; i < 4096; i++)
- {
- HAL_DAC_SetValue(&hdac1, DAC_CHANNEL_2, DAC_ALIGN_12B_R, i);
- HAL_Delay(2);
- if(i%1024 == 0)
- {
- /* 使用ADC采样 */
- HAL_ADC_Start(&hadc1); //启动ADC单次转换
- HAL_ADC_PollForConversion(&hadc1, 50); //等待ADC转换完成
- adc_value = HAL_ADC_GetValue(&hadc1); //读取ADC转换数据
- vol = ((double)adc_value/4096)*3.3;
- printf("adc_value = %d, vol = %.2fV.\n", adc_value, vol);
- }
- }
- printf("DAC test finish, test again!\r\n");
- }
- /* USER CODE END 3 */
- }
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