如題，一開(kāi)始一直進(jìn)不去中斷，考慮可能是配置問(wèn)題，但是反復(fù)對(duì)照過(guò)類(lèi)似代碼，應(yīng)該沒(méi)有缺什么了。
剛剛把DMA_ClearFlag清除標(biāo)志位的2句注釋了，還進(jìn)了中斷，不過(guò)只有上電首次????????????->中斷配置應(yīng)該是通的。
但整個(gè)代碼呈現(xiàn)的效果就感覺(jué)DMA沒(méi)有運(yùn)行，不產(chǎn)生中斷。麻煩幫忙看下是為什么
芯片是：CH32V208RBT6
關(guān)鍵代碼如下：
#define?DataBuf_Len 128
uint8_t RxData1[DataBuf_Len],RxData2[DataBuf_Len];
//SPI2初始化
void SPI_2_DMA_Initial(void)
{
? ? GPIO_InitTypeDef GPIO_InitStructure = {0};
? ? RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);
? ? GPIO_InitStructure.GPIO_Pin = SPI2_CSN;????????//此處引腳、端口都是正確的，因?yàn)檩喸?xún)讀取都是可以的
? ? GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
? ? GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
? ? GPIO_Init(SPI2_SS_PORT, &GPIO_InitStructure);
? ? GPIO_SetBits(SPI2_SS_PORT, SPI2_CSN);
? ? GPIO_InitStructure.GPIO_Pin = SPI2_SCK;
? ? GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
? ? GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
? ? GPIO_Init(SPI2_DT_PORT, &GPIO_InitStructure);
? ? GPIO_InitStructure.GPIO_Pin = SPI2_MISO;
? ? GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
? ? GPIO_Init(SPI2_DT_PORT, &GPIO_InitStructure);
? ? GPIO_InitStructure.GPIO_Pin = SPI2_MOSI;
? ? GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
? ? GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
? ? GPIO_Init(SPI2_DT_PORT, &GPIO_InitStructure);
? ? //------------------------------------------------------
? ? DMA_InitTypeDef DMA_InitStructure = {0};
? ? RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);
? ? DMA_DeInit(DMA1_Channel4);
? ? DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)(&(SPI2->DATAR));
? ? DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)RxData1;
? ? DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
? ? DMA_InitStructure.DMA_BufferSize = 1;????????//后續(xù)使用時(shí)，會(huì)在函數(shù)內(nèi)更改，此處就隨便寫(xiě)了個(gè)
? ? 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_InitStructure.DMA_Priority = DMA_Priority_VeryHigh;
? ? DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;
? ? DMA_Init(DMA1_Channel4, &DMA_InitStructure);
? ? DMA_Cmd(DMA1_Channel4, DISABLE);
? ? DMA_ClearFlag(DMA1_FLAG_GL4|DMA1_FLAG_TC4|DMA1_FLAG_HT4|DMA1_FLAG_TE4);
? ? DMA_ITConfig(DMA1_Channel4,DMA_IT_TC,ENABLE);
? ? //------------------------------------------------------
? ? SPI_InitTypeDef? SPI_InitStructure = {0};
? ? RCC_APB1PeriphClockCmd(RCC_APB1Periph_SPI2,ENABLE);
? ? SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex;
? ? SPI_InitStructure.SPI_Mode = SPI_Mode_Master;
? ? SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b;
? ? SPI_InitStructure.SPI_CPOL = SPI_CPOL_Low;
? ? SPI_InitStructure.SPI_CPHA = SPI_CPHA_1Edge;
? ? SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;
? ? SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_4;
? ? SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;
? ? SPI_InitStructure.SPI_CRCPolynomial = 0;? ? ? ? //??
? ? SPI_Init(SPI2, &SPI_InitStructure);
? ? SPI_I2S_DMACmd(SPI2, SPI_I2S_DMAReq_Rx, ENABLE);
? ? SPI_Cmd(SPI2, ENABLE);
? ? //------------------------------------------------------
//? ? NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);????//在其它地方有了，就注釋了
? ? NVIC_InitTypeDef NVIC_InitStructure = {0};
? ? NVIC_InitStructure.NVIC_IRQChannel = DMA1_Channel4_IRQn;
? ? NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
? ? NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
? ? NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
? ? NVIC_Init(&NVIC_InitStructure);
? ? NVIC_EnableIRQ(DMA1_Channel4_IRQn);
? ? DMA_Cmd(DMA1_Channel4, DISABLE);
}
//收發(fā)單字節(jié)數(shù)據(jù)
uint8_t SPI_ReadWrite_1_Byte(uint8_t byte)
{
? ? u8 i = 0;
? ? ?SPI_I2S_SendData(SPI2, byte);
? ? ?i = 0;
? ? ?while(SPI_I2S_GetFlagStatus(SPI2, SPI_I2S_FLAG_RXNE) == RESET)
? ? ?{
? ? ? ? ?i++;
? ? ? ? ?if(i > 200)
? ? ? ? ? ? ?return 0;
? ? ?}
? ? ?return SPI_I2S_ReceiveData(SPI2);
}
//用于讀取W25Q64中地址為ReadAddr的bufsize長(zhǎng)度數(shù)據(jù)，存儲(chǔ)在temp_buf中
void SPI_FLASH_Get256(uint32_t ReadAddr, uint8_t *temp_buf, uint16_t bufsize)
{
? ? SPI_CS_SET_LOW();// 選擇 FLASH: CS 低電平
? ? SPI_ReadWrite_1_Byte(CMD_READ_BUFF);
? ? SPI_ReadWrite_1_Byte((ReadAddr >> 16) &0xFF);
? ? SPI_ReadWrite_1_Byte((ReadAddr >> 8) &0xFF);
? ? SPI_ReadWrite_1_Byte(ReadAddr&0xFF);
? ? SPI_I2S_ReceiveData(SPI2);
? ? DMA_Cmd(DMA1_Channel4,DISABLE);
? ? DMA_ClearFlag(DMA1_FLAG_GL3|DMA1_FLAG_TC3|DMA1_FLAG_HT3|DMA1_FLAG_TE2);
? ? DMA1_Channel4->CNTR = bufsize;
? ? DMA1_Channel4->PADDR = (uint32_t)(&(SPI2->DATAR));
? ? DMA1_Channel4->MADDR = (uint32_t)temp_buf;
? ? DMA_Cmd(DMA1_Channel4,ENABLE);
}
void DMA1_Channel4_IRQHandler(void) __attribute__((interrupt("WCH-Interrupt-fast")));
void DMA1_Channel4_IRQHandler(void)
{
? ? if(DMA_GetITStatus(DMA1_IT_TC4) !=RESET)
? ? {
? ? ? ? SPI_DMA_Read_Flag = 0x00;
? ? ? ? DMA_Cmd(DMA1_Channel4,DISABLE);
? ? ? ? SPI_CS_SET_HIGH();
? ? ? ? DMA_ClearITPendingBit(DMA1_IT_GL4|DMA1_IT_TC4|DMA1_IT_HT4|DMA1_IT_TE4);
? ? }
}