灵动Mini-F5375-OB开发板评测（一）MindSwitch使用

编写代码：试用一下灵动微的特色外设MindSwitch， MindSwitch 是一个外设到外设的连接和触发矩阵，支持多个输入和输出通道，实现了灵活可配的外设间硬件互联。连接到 MindSwitch 上的典型外设包括定时器、EXTI、GPIOs、软件触发源、ADC、DAC 和比较器等。MDS像一个桥梁一样连接各个外设，接下来配置MDS连接定时器和ADC，实现定时器触发ADC采样，即TIM->MDS->ADC

void TIM_Configure(void)
{


 TIM_TimeBaseInitTypeDef   TIM_TimeBaseInitStruct;
 RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1, ENABLE);

 TIM_TimeBaseStructInit(&TIM_TimeBaseInitStruct);
 TIM_TimeBaseInitStruct.TIM_Prescaler         = TIM_GetTIMxClock(TIM1) / 10000 - 1;
 TIM_TimeBaseInitStruct.TIM_CounterMode       = TIM_CounterMode_Up;
 TIM_TimeBaseInitStruct.TIM_Period            = 1 - 1;
 TIM_TimeBaseInitStruct.TIM_ClockDivision     = TIM_CKD_Div1;
 TIM_TimeBaseInitStruct.TIM_RepetitionCounter = 0x00;
 TIM_TimeBaseInit(TIM1, &TIM_TimeBaseInitStruct);

 TIM_SelectOutputTrigger(TIM1, TIM_TRIGSource_Update);
 TIM_Cmd(TIM1, ENABLE);
}

void Adc_Configure()
{
    GPIO_InitTypeDef          GPIO_InitStruct;
   RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA, ENABLE);
 GPIO_StructInit(&GPIO_InitStruct);
 GPIO_InitStruct.GPIO_Pin   = GPIO_Pin_1  | GPIO_Pin_5;
 GPIO_InitStruct.GPIO_Speed = GPIO_Speed_High;
 GPIO_InitStruct.GPIO_Mode  = GPIO_Mode_AIN;
 GPIO_Init(GPIOA, &GPIO_InitStruct);
 
 ADC_InitTypeDef           ADC_InitStruct;
   RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE);
   ADC_CalibrationConfig(ADC1, 0x1FE);
 ADC_StructInit(&ADC_InitStruct);
 ADC_InitStruct.ADC_Resolution = ADC_Resolution_12b;
 ADC_InitStruct.ADC_Prescaler  = ADC_Prescaler_16;
 ADC_InitStruct.ADC_Mode       = ADC_Mode_Scan; //扫描每个通道进行一次转换
 ADC_InitStruct.ADC_DataAlign  = ADC_DataAlign_Right;
 ADC_Init(ADC1, &ADC_InitStruct);

 ADC_SampleTimeConfig(ADC1, ADC_Channel_1, ADC_SampleTime_240_5);
 ADC_SampleTimeConfig(ADC1, ADC_Channel_5, ADC_SampleTime_240_5);

 ADC_ChannelCmd(ADC1, ADC_Channel_1, ENABLE);
 ADC_ChannelCmd(ADC1, ADC_Channel_5, ENABLE);

 ADC_ExternalTrigSourceConfig(ADC1, ADC_ExtTrig_Edge_Up, ADC_ExtTrig_Shift_16); //选择外部触发源
 ADC_ExternalTrigConvCmd(ADC1, ENABLE);
 
     ADC_ClearFlag(ADC1, ADC_FLAG_EOS);
 ADC_ITConfig(ADC1, ADC_IT_EOS, ENABLE);
     
     
     NVIC_InitTypeDef                  NVIC_InitStruct;        
     NVIC_InitStruct.NVIC_IRQChannel = ADC1_2_IRQn;
 NVIC_InitStruct.NVIC_IRQChannelPreemptionPriority = 0;
 NVIC_InitStruct.NVIC_IRQChannelSubPriority = 1;
 NVIC_InitStruct.NVIC_IRQChannelCmd = ENABLE;
 NVIC_Init(&NVIC_InitStruct);
     
 ADC_Cmd(ADC1, ENABLE);
 
}
void    MDS_Configure()
{
 MDS_TriggerNotCLU_TypeDef MDS_TriggerNotCLU;
 RCC_APB2PeriphClockCmd(RCC_APB2Periph_MDS, ENABLE);
     
 MDS_TriggerNotCluStructInit(&MDS_TriggerNotCLU);
 MDS_TriggerNotCLU.MDS_Channel     = MDS_TriggerOutput_ADC1_EXT_TRIGGER;
 MDS_TriggerNotCLU.MDS_InputEdge   = MDS_InputEdge_Both;
 MDS_TriggerNotCLU.MDS_InputSource = MDS_TriggerSource_TIM1_TRGOUT;
 MDS_TriggerNotCluInit(&MDS_TriggerNotCLU);
 
}

void DAC_Configure(void)
{
 DAC_InitTypeDef  DAC_InitStruct;
 GPIO_InitTypeDef GPIO_InitStruct;

 RCC_APB1PeriphClockCmd(RCC_APB1Periph_DAC, ENABLE);

 DAC_StructInit(&DAC_InitStruct);
 DAC_InitStruct.DAC_WaveGeneration               = DAC_WaveGeneration_None;
 DAC_InitStruct.DAC_LFSRUnmask_TriangleAmplitude = DAC_TriangleAmplitude_1;
 DAC_InitStruct.DAC_OutputBuffer                 = DAC_OutputBuffer_Enable;
 DAC_Init(DAC_Channel_1, &DAC_InitStruct);

 DAC_SetChannel1Data(DAC_Align_12b_R, 0);
 DAC_OutputCmd(DAC_Channel_1, ENABLE);

 RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA, ENABLE);

 GPIO_StructInit(&GPIO_InitStruct);
 GPIO_InitStruct.GPIO_Pin  = GPIO_Pin_4;
 GPIO_InitStruct.GPIO_Mode = GPIO_Mode_AIN;
 GPIO_Init(GPIOA, &GPIO_InitStruct);

 DAC_Cmd(DAC_Channel_1, ENABLE);
}
int main(void)
{
     uint16_t Value = 0;
 PLATFORM_Init();
     TIM_Configure();
     MDS_Configure();
     Adc_Configure();
     DAC_Configure();
 while (1)
 {
           DAC_SetChannel1Data(DAC_Align_12b_R, Value);
     Value = (Value + 255) % 4096;
             //printf("dac:%hu\n" , Value);
     PLATFORM_DelayMS(10);
 }
}

连接ADC采样脚PA1与DAC输出脚PA4，打开串口上位机查看，实现TIM定时触发ADC采样