STM32F4由1ms定时器触发的ADC转换不起作用

时间：2018-08-01 11:01:54

标签： timer stm32 adc

我使用STM32F429板，我的最终目标是使用TIM8触发器获得ADC转换（设置为每1ms传递2.7Ksps或2.7个采样），在缓冲区中收集1000个采样，并每秒进行DMA传输。我设法使Timer运行，但是由于某种原因未触发ADC转换。没有定时器，ADC运行良好且DMA运行正常（不是每1ms，而是更快）。

APB2计时器时钟为168Mhz。 APB2外设时钟为84Mhz。

TIM8初始化功能： 


    void MX_TIM8_Init(void)
    {



    TIM_ClockConfigTypeDef sClockSourceConfig;
    TIM_MasterConfigTypeDef sMasterConfig;
    TIM_SlaveConfigTypeDef sSlaveConfig;
    TIM_OC_InitTypeDef sConfigOC;
    TIM_BreakDeadTimeConfigTypeDef sBreakDeadTimeConfig;

    __HAL_RCC_TIM8_CLK_ENABLE();

    htim8.Instance = TIM8;
    htim8.Init.Prescaler = TIM_CLOCKPRESCALER_DIV8; // 1/(168MHz / 2^8) = 1.5238us
    htim8.Init.CounterMode = TIM_COUNTERMODE_UP;
    htim8.Init.Period = 655;                        // 1.5238us * 656 = 0.999ms ~ 1ms
    htim8.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
    htim8.Init.RepetitionCounter = 0;
    if (HAL_TIM_Base_Init(&htim8) != HAL_OK)
    {
        _Error_Handler(__FILE__, __LINE__);
    }
    HAL_TIM_Base_Start(&htim8);

    sClockSourceConfig.ClockSource = TIM_CLOCKSOURCE_INTERNAL;
    if (HAL_TIM_ConfigClockSource(&htim8, &sClockSourceConfig) != HAL_OK)
    {
        _Error_Handler(__FILE__, __LINE__);
    }

    sSlaveConfig.SlaveMode = TIM_SLAVEMODE_DISABLE;
    sSlaveConfig.InputTrigger = TIM_TS_ITR1;
    if (HAL_TIM_SlaveConfigSynchronization(&htim8, &sSlaveConfig) != HAL_OK)
    {
        _Error_Handler(__FILE__, __LINE__);
    }

    if (HAL_TIM_OC_Init(&htim8) != HAL_OK)
    {
        _Error_Handler(__FILE__, __LINE__);
    }

    sMasterConfig.MasterOutputTrigger = TIM_TRGO_RESET;
    sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE;
    if (HAL_TIMEx_MasterConfigSynchronization(&htim8, &sMasterConfig) != HAL_OK)
    {
        _Error_Handler(__FILE__, __LINE__);
    }

    sConfigOC.OCMode = TIM_OCMODE_TIMING;
    sConfigOC.Pulse = 0;
    sConfigOC.OCPolarity = TIM_OCPOLARITY_HIGH;
    sConfigOC.OCNPolarity = TIM_OCNPOLARITY_HIGH;
    sConfigOC.OCFastMode = TIM_OCFAST_DISABLE;
    sConfigOC.OCIdleState = TIM_OCIDLESTATE_RESET;
    sConfigOC.OCNIdleState = TIM_OCNIDLESTATE_RESET;
    if (HAL_TIM_OC_ConfigChannel(&htim8, &sConfigOC, TIM_CHANNEL_1) != HAL_OK)
    {
        _Error_Handler(__FILE__, __LINE__);
    }

    sBreakDeadTimeConfig.OffStateRunMode = TIM_OSSR_DISABLE;
    sBreakDeadTimeConfig.OffStateIDLEMode = TIM_OSSI_DISABLE;
    sBreakDeadTimeConfig.LockLevel = TIM_LOCKLEVEL_OFF;
    sBreakDeadTimeConfig.DeadTime = 0;
    sBreakDeadTimeConfig.BreakState = TIM_BREAK_DISABLE;
    sBreakDeadTimeConfig.BreakPolarity = TIM_BREAKPOLARITY_HIGH;
    sBreakDeadTimeConfig.AutomaticOutput = TIM_AUTOMATICOUTPUT_DISABLE;
    if (HAL_TIMEx_ConfigBreakDeadTime(&htim8, &sBreakDeadTimeConfig) != HAL_OK)
    {
        _Error_Handler(__FILE__, __LINE__);
    }

}

ADC初始化功能： 

    TIM_ClockConfigTypeDef sClockSourceConfig;
    TIM_MasterConfigTypeDef sMasterConfig;
    TIM_SlaveConfigTypeDef sSlaveConfig;
    TIM_OC_InitTypeDef sConfigOC;
    TIM_BreakDeadTimeConfigTypeDef sBreakDeadTimeConfig;

    __HAL_RCC_TIM8_CLK_ENABLE();

    htim8.Instance = TIM8;
    htim8.Init.Prescaler = TIM_CLOCKPRESCALER_DIV8; // 1/(168MHz / 2^8) = 1.5238us
    htim8.Init.CounterMode = TIM_COUNTERMODE_UP;
    htim8.Init.Period = 655;                        // 1.5238us * 656 = 0.999ms ~ 1ms
    htim8.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
    htim8.Init.RepetitionCounter = 0;
    if (HAL_TIM_Base_Init(&htim8) != HAL_OK)
    {
        _Error_Handler(__FILE__, __LINE__);
    }
    HAL_TIM_Base_Start(&htim8);

    sClockSourceConfig.ClockSource = TIM_CLOCKSOURCE_INTERNAL;
    if (HAL_TIM_ConfigClockSource(&htim8, &sClockSourceConfig) != HAL_OK)
    {
        _Error_Handler(__FILE__, __LINE__);
    }

    sSlaveConfig.SlaveMode = TIM_SLAVEMODE_DISABLE;
    sSlaveConfig.InputTrigger = TIM_TS_ITR1;
    if (HAL_TIM_SlaveConfigSynchronization(&htim8, &sSlaveConfig) != HAL_OK)
    {
        _Error_Handler(__FILE__, __LINE__);
    }

    if (HAL_TIM_OC_Init(&htim8) != HAL_OK)
    {
        _Error_Handler(__FILE__, __LINE__);
    }

    sMasterConfig.MasterOutputTrigger = TIM_TRGO_RESET;
    sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE;
    if (HAL_TIMEx_MasterConfigSynchronization(&htim8, &sMasterConfig) != HAL_OK)
    {
        _Error_Handler(__FILE__, __LINE__);
    }

    sConfigOC.OCMode = TIM_OCMODE_TIMING;
    sConfigOC.Pulse = 0;
    sConfigOC.OCPolarity = TIM_OCPOLARITY_HIGH;
    sConfigOC.OCNPolarity = TIM_OCNPOLARITY_HIGH;
    sConfigOC.OCFastMode = TIM_OCFAST_DISABLE;
    sConfigOC.OCIdleState = TIM_OCIDLESTATE_RESET;
    sConfigOC.OCNIdleState = TIM_OCNIDLESTATE_RESET;
    if (HAL_TIM_OC_ConfigChannel(&htim8, &sConfigOC, TIM_CHANNEL_1) != HAL_OK)
    {
        _Error_Handler(__FILE__, __LINE__);
    }

    sBreakDeadTimeConfig.OffStateRunMode = TIM_OSSR_DISABLE;
    sBreakDeadTimeConfig.OffStateIDLEMode = TIM_OSSI_DISABLE;
    sBreakDeadTimeConfig.LockLevel = TIM_LOCKLEVEL_OFF;
    sBreakDeadTimeConfig.DeadTime = 0;
    sBreakDeadTimeConfig.BreakState = TIM_BREAK_DISABLE;
    sBreakDeadTimeConfig.BreakPolarity = TIM_BREAKPOLARITY_HIGH;
    sBreakDeadTimeConfig.AutomaticOutput = TIM_AUTOMATICOUTPUT_DISABLE;
    if (HAL_TIMEx_ConfigBreakDeadTime(&htim8, &sBreakDeadTimeConfig) != HAL_OK)
    {
        _Error_Handler(__FILE__, __LINE__);
    }

}

主要代码：


    void MX_ADC1_Init(void)
    {



    ADC_ChannelConfTypeDef sConfig;
    __HAL_RCC_GPIOA_CLK_ENABLE();
    /**Configure the global features of the ADC (Clock, Resolution, Data Alignment and number of conversion)
    */
    hadc1.Instance = ADC1;
    hadc1.Init.ClockPrescaler = ADC_CLOCK_SYNC_PCLK_DIV2; // 84MHz / 2^6 = 1312.5 KHz
    hadc1.Init.Resolution = ADC_RESOLUTION_12B;
    hadc1.Init.ScanConvMode = ENABLE;
    hadc1.Init.ContinuousConvMode = ENABLE;
    hadc1.Init.DiscontinuousConvMode = DISABLE;
    hadc1.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_RISING;
    hadc1.Init.ExternalTrigConv = ADC_EXTERNALTRIGCONV_T8_TRGO;
    hadc1.Init.DataAlign = ADC_DATAALIGN_RIGHT;
    hadc1.Init.NbrOfConversion = 2;
    hadc1.Init.DMAContinuousRequests = ENABLE;
    hadc1.Init.EOCSelection = ADC_EOC_SINGLE_CONV;
    if (HAL_ADC_Init(&hadc1) != HAL_OK) {
        _Error_Handler(__FILE__, __LINE__);
    }

    /**Configure for the selected ADC regular channel its corresponding rank in the sequencer and its sample time.
    */
    sConfig.Channel = ADC_CHANNEL_5;
    sConfig.Rank = 1;
    sConfig.SamplingTime = ADC_SAMPLETIME_480CYCLES; // 1312.5KHz / 480cyc per sample = 2.7Ksps
    if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK) {
        _Error_Handler(__FILE__, __LINE__);
    }

    /**Configure for the selected ADC regular channel its corresponding rank in the sequencer and its sample time.
    */
    sConfig.Channel = ADC_CHANNEL_7;
    sConfig.Rank = 2;
    sConfig.SamplingTime = ADC_SAMPLETIME_480CYCLES;
    if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK) {
        _Error_Handler(__FILE__, __LINE__);
    }

}

在调试时， ADC_ChannelConfTypeDef sConfig; __HAL_RCC_GPIOA_CLK_ENABLE(); /**Configure the global features of the ADC (Clock, Resolution, Data Alignment and number of conversion) */ hadc1.Instance = ADC1; hadc1.Init.ClockPrescaler = ADC_CLOCK_SYNC_PCLK_DIV2; // 84MHz / 2^6 = 1312.5 KHz hadc1.Init.Resolution = ADC_RESOLUTION_12B; hadc1.Init.ScanConvMode = ENABLE; hadc1.Init.ContinuousConvMode = ENABLE; hadc1.Init.DiscontinuousConvMode = DISABLE; hadc1.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_RISING; hadc1.Init.ExternalTrigConv = ADC_EXTERNALTRIGCONV_T8_TRGO; hadc1.Init.DataAlign = ADC_DATAALIGN_RIGHT; hadc1.Init.NbrOfConversion = 2; hadc1.Init.DMAContinuousRequests = ENABLE; hadc1.Init.EOCSelection = ADC_EOC_SINGLE_CONV; if (HAL_ADC_Init(&hadc1) != HAL_OK) { _Error_Handler(__FILE__, __LINE__); } /**Configure for the selected ADC regular channel its corresponding rank in the sequencer and its sample time. */ sConfig.Channel = ADC_CHANNEL_5; sConfig.Rank = 1; sConfig.SamplingTime = ADC_SAMPLETIME_480CYCLES; // 1312.5KHz / 480cyc per sample = 2.7Ksps if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK) { _Error_Handler(__FILE__, __LINE__); } /**Configure for the selected ADC regular channel its corresponding rank in the sequencer and its sample time. */ sConfig.Channel = ADC_CHANNEL_7; sConfig.Rank = 2; sConfig.SamplingTime = ADC_SAMPLETIME_480CYCLES; if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK) { _Error_Handler(__FILE__, __LINE__); } } 给出了证明它正在运行的计数，但是 int main(void) { //MCU Configuration---------------------------------------------------------- // Reset of all peripherals, Initializes the Flash interface and the Systick. HAL_Init(); // Configure the system clock SystemClock_Config(); // Initialize all configured peripherals MX_DMA_Init(); MX_ADC1_Init(); MX_TIM8_Init(); HAL_ADC_Start_DMA(&hadc1, (uint32_t*)ADC_buf, ADC_BUFFER_LENGTH); DBGMCU->APB2FZ |= (DBGMCU_APB2_FZ_DBG_TIM8_STOP); //Stop timer if code hit a breakpoint int timerValue = 0; while (1) { timerValue = __HAL_TIM_GET_COUNTER(&htim8); if (halfConvFlag != false) { println ("Half Conversion callback"); halfConvFlag = false; } else if (fullConvFlag != false) { println ("Full Conversion callback"); fullConvFlag = false; } } } 没有收集任何值。我缺少的是，时钟配置应该是正确的2个通道，每毫秒2个样本，计时器接近1毫秒。我使用STM32CubeMX生成了计时器配置。

0 个答案:

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