DMA1 Channel5 进不了中断
我使用双USART USART1 采用DMA1 Channel4 USART2 采用 DMA1 Channel5但是 Channel5的中断一直进不去，我把2路通道互换，Channel5中断还是进不去，不知道什么原因
/*---------------------------------------------------------------------*/
/*INIT IO */
/*INPUT:NONE */
/*OUTPUT:NONE */
/*---------------------------------------------------------------------*/
void bsp_uart_init(){
//GPIO¶Ë¿ÚÉèÖÃ
GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef UART_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
DMA_InitTypeDef DMA_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE); //ʹÄÜUART1
RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, ENABLE); //ʹÄÜUART1
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE); //?? PB,PE ???? ;
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
NVIC_InitStructure.NVIC_IRQChannel = DMA1_Channel4_IRQn; //???????1??
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority= 1;
NVIC_InitStructure.NVIC_IRQChannelSubPriority= 3;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //????
NVIC_Init(&NVIC_InitStructure); //???
//UART1_TX GPIOA.9
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2|GPIO_Pin_9; //PA.9
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;//GPIO_Mode_IN_FLOATING;//¸¡¿ÕÊäÈë
GPIO_Init(GPIOA, &GPIO_InitStructure);//³õʼ»¯GPIOA.9
//UART1_RX GPIOA.10³õʼ»¯
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3|GPIO_Pin_10;//PA10
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;//GPIO_Mode_AF_PP; //¸´ÓÃÍÆÍìÊä³ö
GPIO_Init(GPIOA, &GPIO_InitStructure);//³õʼ»¯GPIOA.10
/************DMA1_Channel2***********/
DMA_DeInit(DMA1_Channel4); //??7???,??UART1???
DMA_InitStructure.DMA_PeripheralBaseAddr = (u32)&USART1->DR;
DMA_InitStructure.DMA_MemoryBaseAddr = (u32)UART_TX_BUF; //????UART1_TxBuff
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralDST; //??:??-->???????
DMA_InitStructure.DMA_BufferSize = 0; //????
DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable; //?????
DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable; //????
DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte;//??????:??
DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte; //??????:??
DMA_InitStructure.DMA_Mode = DMA_Mode_Normal;//DMA??:????,???
DMA_InitStructure.DMA_Priority = DMA_Priority_Medium; //???:?
DMA_InitStructure.DMA_M2M = DMA_M2M_Disable; //memory-to-memory ??
DMA_Init(DMA1_Channel4, &DMA_InitStructure);
DMA_ClearFlag(DMA1_FLAG_TC4);
DMA_ITConfig(DMA1_Channel4,DMA_IT_TC,ENABLE); //DMA??????
//UART1 NVIC ÅäÖÃ
// NVIC_InitStructure.NVIC_IRQChannel = UART1_IRQn;
// NVIC_InitStructure.NVIC_IRQChannelPriority = 3; //×ÓÓÅÏȼ¶3
// NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //IRQͨµÀʹÄÜ
// NVIC_Init(&NVIC_InitStructure); //¸ù¾ÝÖ¸¶¨µÄ²ÎÊý³õʼ»¯VIC¼Ä´æÆ÷
//UART ³õʼ»¯ÉèÖÃ
// GPIO_PinAFConfig(GPIOA,GPIO_PinSource9,GPIO_AF_3);
// GPIO_PinAFConfig(GPIOA,GPIO_PinSource10,GPIO_AF_3);
UART_InitStructure.USART_BaudRate = BAUD_9600;//´®¿Ú²¨ÌØÂÊ
UART_InitStructure.USART_WordLength = USART_WordLength_8b;//×Ö³¤Îª8λÊý¾Ý¸ñʽ
UART_InitStructure.USART_StopBits = USART_StopBits_1;//Ò»¸öֹͣλ
UART_InitStructure.USART_Parity = USART_Parity_No;//ÎÞÆæżУÑéλ
UART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;//ÎÞÓ²¼þÊý¾ÝÁ÷¿ØÖÆ
UART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx; //ÊÕ·¢Ä£Ê½
USART_Init(USART1, &UART_InitStructure); //³õʼ»¯´®¿Ú1
// UART_ITConfig(UART1, UART_IT_RXIEN, ENABLE);//¿ªÆô´®¿Ú½ÓÊÜÖжÏ
USART_DMACmd(USART1,USART_DMAReq_Tx,ENABLE);//½«UART1µÄ·¢ËÍDMA¹¦ÄÜ´ò¿ª
USART_DMACmd(USART1,USART_DMAReq_Rx,DISABLE);//½«UART1µÄ·¢ËÍDMA¹¦ÄÜ´ò¿ª
USART_Cmd(USART1, ENABLE); //ʹÄÜ´®¿Ú1
DMA_Cmd(DMA1_Channel4, ENABLE); // ----------------------
////////------------------UART2-------------------------------------///////////
// RCC_APB1PeriphResetCmd(RCC_APB1Periph_USART2, ENABLE); //UART2
// RCC_APB1PeriphResetCmd(RCC_APB1Periph_USART2, DISABLE); //UART2
NVIC_InitStructure.NVIC_IRQChannel = USART2_IRQn; //????1????
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 3; //???????
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 3; //??????
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //????1??
NVIC_Init(&NVIC_InitStructure);
NVIC_InitStructure.NVIC_IRQChannel = DMA1_Channel5_IRQn; //???????1??
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority= 2;
NVIC_InitStructure.NVIC_IRQChannelSubPriority= 4;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //????
NVIC_Init(&NVIC_InitStructure);
DMA_DeInit(DMA1_Channel5); // ?????
DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)(&USART2->DR);// ???????????
DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)UART2_TX_BUF; // ??????????
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralDST; // ???????,????? -> ?????
DMA_InitStructure.DMA_BufferSize = 0; // ????????,?????????0,???????????,???????
DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable; // ??????????,??????DMA?????
DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable; // ???????????
DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte; // ??????8?,1???
DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte; // ??????8?,1???
DMA_InitStructure.DMA_Mode = DMA_Mode_Normal; // ??????
DMA_InitStructure.DMA_Priority = DMA_Priority_VeryHigh; // ?????
DMA_InitStructure.DMA_M2M = DMA_M2M_Disable; // ????????DMA??
DMA_Init(DMA1_Channel5, &DMA_InitStructure); // ????
DMA_ClearFlag(DMA1_FLAG_GL5); // ??DMA????//UART2?TX?DMA1??7
DMA_ITConfig(DMA1_Channel5, DMA_IT_TC, ENABLE); // ????DMA????
UART_InitStructure.USART_BaudRate = BAUD_115200;//´®¿Ú²¨ÌØÂÊ
UART_InitStructure.USART_WordLength = USART_WordLength_8b;//×Ö³¤Îª8λÊý¾Ý¸ñʽ
UART_InitStructure.USART_StopBits = USART_StopBits_1;//Ò»¸öֹͣλ
UART_InitStructure.USART_Parity = USART_Parity_No;//ÎÞÆæżУÑéλ
UART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;//ÎÞÓ²¼þÊý¾ÝÁ÷¿ØÖÆ
UART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx; //ÊÕ·¢Ä£Ê½
USART_Init(USART2, &UART_InitStructure); //³õʼ»¯´®¿Ú1
USART_ITConfig(USART2, USART_IT_RXNE, ENABLE);//¿ªÆô´®¿Ú½ÓÊÜÖжÏ
USART_DMACmd(USART2,USART_DMAReq_Tx,ENABLE);//½«UART1µÄ·¢ËÍDMA¹¦ÄÜ´ò¿ª
USART_DMACmd(USART2,USART_DMAReq_Rx,DISABLE);//½«UART1µÄ·¢ËÍDMA¹¦ÄÜ´ò¿ª
USART_Cmd(USART2, ENABLE); //ʹÄÜ´®¿Ú1
// USART_ITConfig(USART2, USART_IT_IDLE, ENABLE);//¿ªÆô´®¿Ú½ÓÊÜÖжÏ
DMA_Cmd(DMA1_Channel5, ENABLE); // ????DMA??,??????
}
/*---------------------------------------------------------------------*/
/*INIT IO */
/*INPUT:NONE */
/*OUTPUT:NONE */
/*---------------------------------------------------------------------*/
unsigned char UART1_DMA_SendDat(unsigned char *DataAddress,unsigned int len)
{
unsigned int len2;
usart_tx_finish &= ~UART1_FLAG;
while(len>(UART_TX_LEN-UART1_TxCnt))//??????????????????????????
{
if(usart_tx_finish&UART1_FLAG)break;
}
memcpy(UART_TX_BUF+UART1_TxCnt,DataAddress,len);
UART1_DMA_TX_CH->CCR &= (unsigned int)(~UART1_DMA_TX_EN);//??DMA??1
len2=UART1_TxCnt-UART1_DMA_TX_CH->CNDTR; //??????????
UART1_TxCnt+=len; //UART1_TxCnt?????,?????UART1_TxBuff????????
UART1_DMA_TX_CH->CMAR = (u32)UART_TX_BUF+len2;//????
UART1_DMA_TX_CH->CNDTR = UART1_DMA_TX_CH->CNDTR+len;//??DMA ??????
UART1_DMA_TX_CH->CCR |= UART1_DMA_TX_EN;//??DMA??1
while((usart_tx_finish&UART1_FLAG)==0);
return 1;
}
/*---------------------------------------------------------------------*/
/*INIT IO */
/*INPUT:NONE */
/*OUTPUT:NONE */
/*---------------------------------------------------------------------*/
void DMA1_Channel4_IRQHandler(void)
{
if(DMA_GetITStatus(UART1_DMA_TX_TC) == SET)//?????????
{
DMA1->IFCR = UART1_DMA_TX_TC; //??????
UART1_TxCnt=0;//??????
usart_tx_finish |= UART1_FLAG;
}
}
/*---------------------------------------------------------------------*/
/*INIT IO */
/*INPUT:NONE */
/*OUTPUT:NONE */
/*---------------------------------------------------------------------*/
unsigned char UART2_DMA_SendDat(unsigned char *DataAddress,unsigned int len)
{
unsigned int len2;
usart2_tx_finish &= ~UART1_FLAG;
while(len>(UART2_TX_LEN-UART2_TxCnt))//??????????????????????????
{
if(usart2_tx_finish&UART2_FLAG)break;
}
memcpy(UART2_TX_BUF+UART2_TxCnt,DataAddress,len);
UART2_DMA_TX_CH->CCR &= (unsigned int)(~UART2_DMA_TX_EN);//??DMA??1
len2=UART2_TxCnt-UART2_DMA_TX_CH->CNDTR; //??????????
UART2_TxCnt+=len; //UART1_TxCnt?????,?????UART1_TxBuff????????
UART2_DMA_TX_CH->CMAR = (u32)UART2_TX_BUF+len2;//????
UART2_DMA_TX_CH->CNDTR = UART2_DMA_TX_CH->CNDTR+len;//??DMA ??????
UART2_DMA_TX_CH->CCR |= UART2_DMA_TX_EN;//??DMA??1
while((usart2_tx_finish&UART2_FLAG)==0);
return 1;
}
/*---------------------------------------------------------------------*/
/*INIT IO */
/*INPUT:NONE */
/*OUTPUT:NONE */
/*---------------------------------------------------------------------*/
void DMA1_Channel5_IRQHandler(void)
{
if(DMA_GetITStatus(UART2_DMA_TX_TC) == SET)//?????????
{
DMA2->IFCR = UART2_DMA_TX_TC; //??????
UART2_TxCnt=0;//??????
usart2_tx_finish |= UART2_FLAG;
}
}
#define UART1_DMA_TX_CH DMA1_Channel4
#define UART1_DMA_TX_IRQ DMA1_Channel4_IRQn
#define UART1_DMA_TX_EN DMA_CCR2_EN
#define UART1_DMA_TX_TC DMA1_IT_TC4
#define UART2_DMA_TX_CH DMA1_Channel5
#define UART2_DMA_TX_IRQ DMA1_Channel5_IRQn
#define UART2_DMA_TX_EN DMA_CCR2_EN
#define UART2_DMA_TX_TC DMA1_IT_TC5 通道5是USART1的RX，通道6才是USART2的RX，所以你肯定进不去通道5的中断啊
改成通道6就可以了 用cubeMX来初始化代码定义的话，能看到 channel 与其他设置的冲突。 mylovemcu 发表于 2019-11-14 10:34
通道5是USART1的RX，通道6才是USART2的RX，所以你肯定进不去通道5的中断啊
改成通道6就可以了 ...
多谢！ 写程序还是要多看芯片手册，不能主观凭空想象
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