UART4的DMA2通道中断进不了，不知道怎么回事？但DMA1通道的中断能进，原子哥求助啊

黎明哥 · 发表于 2018-5-11 10:22:46

u8 SendBuff[2000];
u8 ReceiveBuff[2000];
u16 ReceiveCnt = 0;
u8 dmaover =0;

const u8 TEXT_TO_SEND[]={"ALIENTEK Warship STM32 DMA 串口实验"};
int main(void)
{
u16 i;
u8 t=0;
u8 j,mask=0;
float pro=0;//进度

delay_init();            //延时函数初始化
NVIC_Configuration();    //设置NVIC中断分组2:2位抢占优先级，2位响应优先级
uart_init(9600);      //串口初始化为9600
LED_Init();       //LED端口初始化
LCD_Init();         //初始化LCD
KEY_Init(); //按键初始化

MYDMA_Config(DMA2_Channel5,(u32)&UART4->DR,(u32)SendBuff,1900);//DMA2通道5,外设为串口4,存储器为SendBuff,长度1900.

// DMA_RX_Config(DMA1_Channel5,(u32)&USART1->DR,(u32)ReceiveBuff,2000);//DMA1通道4,外设为串口1,存储器为SendBuff,长度5168.

POINT_COLOR=RED;//设置字体为红色
LCD_ShowString(60,50,200,16,16,"WarShip STM32");
LCD_ShowString(60,70,200,16,16,"DMA TEST");
LCD_ShowString(60,90,200,16,16,"ATOM@ALIENTEK");
LCD_ShowString(60,110,200,16,16,"2012/9/8");
LCD_ShowString(60,130,200,16,16,"KEY0:Start");
//显示提示信息
j=sizeof(TEXT_TO_SEND);
for(i=0;i<1900;i++)//填充ASCII字符集数据
{
if(t>=j)//加入换行符
{
if(mask)
{
SendBuff[i]=0x0a;
t=0;
}else
{
SendBuff[i]=0x0d;
mask++;
}
}else//复制TEXT_TO_SEND语句
{
mask=0;
SendBuff[i]=TEXT_TO_SEND[t];
t++;
}
}
POINT_COLOR=BLUE;//设置字体为蓝色
i=0;
while(1)
{
t=KEY_Scan(0);
if(t==KEY_RIGHT)//KEY0按下
{
// ReceiveCnt =0;
LCD_ShowString(60,150,200,16,16,"Start Transimit....");
LCD_ShowString(60,170,200,16,16," %");//显示百分号
printf("\r\nDMA DATA:\r\n");
USART_DMACmd(UART4,USART_DMAReq_Tx,ENABLE); //使能串口4的DMA发送
MYDMA_Enable(DMA2_Channel5);//开始一次DMA传输！
      //等待DMA传输完成，此时我们来做另外一些事，点灯
      //实际应用中，传输数据期间，可以执行另外的任务

while(1)
      {
// if(DMA_GetFlagStatus(DMA1_FLAG_TC4)!=RESET) //判断通道4传输完成
// {
// DMA_ClearFlag(DMA1_FLAG_TC4);//清除通道4传输完成标志
// break;
//          }
if(dmaover)
{
dmaover=0;
break;
         }
pro=DMA_GetCurrDataCounter(DMA2_Channel5);//得到当前还剩余多少个数据
pro=1-pro/1900;//得到百分比
pro*=100;    //扩大100倍
LCD_ShowNum(60,170,pro,3,16);
      }
LCD_ShowNum(60,170,100,3,16);//显示100%
LCD_ShowString(60,150,200,16,16,"Transimit Finished!");//提示传送完成
}
i++;
delay_ms(10);
if(i==20)
{
LED0=!LED0;//提示系统正在运行
i=0;
}
}
}

DMA_InitTypeDef DMA_InitStructure;
extern u8 dmaover;

u16 DMA2_MEM_LEN;//保存DMA每次数据传送的长度
//DMA2的各通道配置
//这里的传输形式是固定的,这点要根据不同的情况来修改
//从存储器->外设模式/8位数据宽度/存储器增量模式
//DMA_CHx

MA通道CHx
//cpar:外设地址
//cmar:存储器地址
//cndtr:数据传输量
void MYDMA_Config(DMA_Channel_TypeDef* DMA_CHx,u32 cpar,u32 cmar,u16 cndtr)
{
NVIC_InitTypeDef NVIC_InitStructure;

RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA2, ENABLE); //使能DMA传输
delay_ms(5); //等待DMA时钟稳定
DMA_DeInit(DMA_CHx); //将DMA2的通道5寄存器重设为缺省值
DMA2_MEM_LEN=cndtr;
DMA_InitStructure.DMA_PeripheralBaseAddr = cpar;  //DMA外设ADC基地址
DMA_InitStructure.DMA_MemoryBaseAddr = cmar;  //DMA内存基地址
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralDST;  //数据传输方向，从内存读取发送到外设
DMA_InitStructure.DMA_BufferSize = cndtr;  //DMA通道的DMA缓存的大小
DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;  //外设地址寄存器不变
DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;  //内存地址寄存器递增
DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte;  //外设数据宽度为8位
DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte; //存储器数据宽度为8位
DMA_InitStructure.DMA_Mode = DMA_Mode_Normal;  //工作在正常缓存模式
DMA_InitStructure.DMA_Priority = DMA_Priority_Medium; //DMA通道 x拥有中优先级
DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;  //DMA通道x没有设置为内存到内存传输

DMA_Init(DMA_CHx, &DMA_InitStructure);  //根据DMA_InitStruct中指定的参数初始化DMA的通道UART4_Tx_DMA_Channel所标识的寄存器

NVIC_InitStructure.NVIC_IRQChannel = DMA2_Channel4_5_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);

DMA_ITConfig(DMA2_Channel5,DMA_IT_TC,ENABLE); //使能传输完成中断

}
//开启一次DMA传输
void MYDMA_Enable(DMA_Channel_TypeDef*DMA_CHx)
{
DMA_Cmd(DMA_CHx, DISABLE );  //关闭USART4 TX DMA2 所指示的通道
DMA_SetCurrDataCounter(DMA2_Channel5,DMA2_MEM_LEN);//DMA通道的DMA缓存的大小
DMA_Cmd(DMA_CHx, ENABLE);  //使能USART1 TX DMA1 所指示的通道
}

void DMA2_Channel4_5_IRQHandler(void)
{
if(DMA_GetFlagStatus(DMA2_FLAG_TC5)!=RESET) //判断通道5传输完成
{
DMA_ClearFlag(DMA2_FLAG_TC5);//清除通道5传输完成标志
dmaover=1;
}
LED1=!LED1;
}

//初始化IO 串口4
//bound:波特率
void uart_init(u32 bound){

   RCC_APB2PeriphClockCmd(RCC_APB1Periph_UART4|RCC_APB2Periph_GPIOC, ENABLE);  //使能UART4，GPIOA时钟
   USART_DeInit(UART4);  //复位串口4
   //UART4_TX PC.10
   GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
   GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
   GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; //复用推挽输出
   GPIO_Init(GPIOC, &GPIO_InitStructure); //初始化PC10

   //UART4_RX PC.11
   GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11;
   GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;//浮空输入
   GPIO_Init(GPIOC, &GPIO_InitStructure);  //初始化PC11

//Usart1 NVIC 配置

   NVIC_InitStructure.NVIC_IRQChannel = UART4_IRQn;
   NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=1;//抢占优先级3
   NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;    //子优先级3
   NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;    //IRQ通道使能
   NVIC_Init(&NVIC_InitStructure); //根据指定的参数初始化VIC寄存器

//USART 初始化设置

   USART_InitStructure.USART_BaudRate = bound;//一般设置为9600;
   USART_InitStructure.USART_WordLength = USART_WordLength_8b;//字长为8位数据格式
   USART_InitStructure.USART_StopBits = USART_StopBits_1;//一个停止位
   USART_InitStructure.USART_Parity = USART_Parity_No;//无奇偶校验位
   USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;//无硬件数据流控制
   USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx; //收发模式

   USART_Init(UART4, &USART_InitStructure); //初始化串口
   USART_ITConfig(UART4, USART_IT_RXNE, ENABLE);//开启中断
   USART_Cmd(UART4, ENABLE);    //使能串口
   USART_ClearFlag(UART4, USART_FLAG_TC); /* 清发送完成标志，Transmission Complete flag */

}

            ; External Interrupts
            DCD    WWDG_IRQHandler          ; Window Watchdog
            DCD    PVD_IRQHandler          ; PVD through EXTI Line detect
            DCD    TAMPER_IRQHandler       ; Tamper
            DCD    RTC_IRQHandler          ; RTC
            DCD    FLASH_IRQHandler          ; Flash
            DCD    RCC_IRQHandler          ; RCC
            DCD    EXTI0_IRQHandler          ; EXTI Line 0
            DCD    EXTI1_IRQHandler          ; EXTI Line 1
            DCD    EXTI2_IRQHandler          ; EXTI Line 2
            DCD    EXTI3_IRQHandler          ; EXTI Line 3
            DCD    EXTI4_IRQHandler          ; EXTI Line 4
            DCD    DMA1_Channel1_IRQHandler ; DMA1 Channel 1
            DCD    DMA1_Channel2_IRQHandler ; DMA1 Channel 2
            DCD    DMA1_Channel3_IRQHandler ; DMA1 Channel 3
            DCD    DMA1_Channel4_IRQHandler ; DMA1 Channel 4
            DCD    DMA1_Channel5_IRQHandler ; DMA1 Channel 5
            DCD    DMA1_Channel6_IRQHandler ; DMA1 Channel 6
            DCD    DMA1_Channel7_IRQHandler ; DMA1 Channel 7
            DCD    ADC1_2_IRQHandler       ; ADC1 & ADC2
            DCD    USB_HP_CAN1_TX_IRQHandler  ; USB High Priority or CAN1 TX
            DCD    USB_LP_CAN1_RX0_IRQHandler ; USB Low  Priority or CAN1 RX0
            DCD    CAN1_RX1_IRQHandler       ; CAN1 RX1
            DCD    CAN1_SCE_IRQHandler       ; CAN1 SCE
            DCD    EXTI9_5_IRQHandler       ; EXTI Line 9..5
            DCD    TIM1_BRK_IRQHandler       ; TIM1 Break
            DCD    TIM1_UP_IRQHandler       ; TIM1 Update
            DCD    TIM1_TRG_COM_IRQHandler ; TIM1 Trigger and Commutation
            DCD    TIM1_CC_IRQHandler       ; TIM1 Capture Compare
            DCD    TIM2_IRQHandler          ; TIM2
            DCD    TIM3_IRQHandler          ; TIM3
            DCD    TIM4_IRQHandler          ; TIM4
            DCD    I2C1_EV_IRQHandler       ; I2C1 Event
            DCD    I2C1_ER_IRQHandler       ; I2C1 Error
            DCD    I2C2_EV_IRQHandler       ; I2C2 Event
            DCD    I2C2_ER_IRQHandler       ; I2C2 Error
            DCD    SPI1_IRQHandler          ; SPI1
            DCD    SPI2_IRQHandler          ; SPI2
            DCD    USART1_IRQHandler       ; USART1
            DCD    USART2_IRQHandler       ; USART2
            DCD    USART3_IRQHandler       ; USART3
            DCD    EXTI15_10_IRQHandler    ; EXTI Line 15..10
            DCD    RTCAlarm_IRQHandler       ; RTC Alarm through EXTI Line
            DCD    USBWakeUp_IRQHandler    ; USB Wakeup from suspend
            DCD    TIM8_BRK_IRQHandler       ; TIM8 Break
            DCD    TIM8_UP_IRQHandler       ; TIM8 Update
            DCD    TIM8_TRG_COM_IRQHandler ; TIM8 Trigger and Commutation
            DCD    TIM8_CC_IRQHandler       ; TIM8 Capture Compare
            DCD    ADC3_IRQHandler          ; ADC3
            DCD    FSMC_IRQHandler          ; FSMC
            DCD    SDIO_IRQHandler          ; SDIO
            DCD    TIM5_IRQHandler          ; TIM5
            DCD    SPI3_IRQHandler          ; SPI3
            DCD    UART4_IRQHandler          ; UART4
            DCD    UART5_IRQHandler          ; UART5
            DCD    TIM6_IRQHandler          ; TIM6
            DCD    TIM7_IRQHandler          ; TIM7
            DCD    DMA2_Channel1_IRQHandler ; DMA2 Channel1
            DCD    DMA2_Channel2_IRQHandler ; DMA2 Channel2
            DCD    DMA2_Channel3_IRQHandler ; DMA2 Channel3
            DCD    DMA2_Channel4_5_IRQHandler ; DMA2 Channel4 & Channel5