求助！求助!STMF373上UCOS+SDADC+DMA+USART2，串口数据传出SADC采样有时正常有时不正常。

qiancheng2014 · 发表于 2015-11-30 14:44:57

刚编译下载运行后，会正常，然后断电再上电，串口数据传出SDADC采样就不对了，应该不是串口的原因，尝试过发送0x01数据对。ucos版本2.91

qiancheng2014 · 发表于 2015-11-30 14:55:13

正常来说80 00是对的，但是重新上电后变成27 7D而且SDADC应该是没工作的。

[mw_shl_code=c,true]void ICPmini_Main(void) { OSInit(); OSTaskCreate(start_task,(void*)0,(OS_STK*)&START_TASK_STK[START_STK_SIZE-1],START_TASK_PRIO); OSStart(); } static void start_task(void *pdata) { OS_CPU_SR cpu_sr=0; OSDelay_init(72); /* ???±?????????? */ OS_ENTER_CRITICAL(); /* ICP&ICT???ù???????????? */ Mbox_ICPandICT = OSMboxCreate((void *)0); OSTaskCreate(Zigbee_task,(void*)0,(OS_STK*)&ZIGBEE_TASK_STK[ZIGBEE_STK_SIZE-1],ZIGBEE_TASK_PRIO); OSTaskCreate(Uart_task,(void*)0,(OS_STK*)&UART_TASK_STK[UART_STK_SIZE-1],UART_TASK_PRIO); // OSTaskCreate(Standby_task,(void*)0,(OS_STK*)&STANDBY_TASK_STK[STANDBY_STK_SIZE-1],STANDBY_TASK_PRIO);//?¨?±?????????????±???? OSTaskSuspend(START_TASK_PRIO); OS_EXIT_CRITICAL(); } void Zigbee_task(void * pdata) { BSP_Init(); ICPandICT_StartCov(); while(1) { Power_Zigbee_On(); delay_ms(1000); Power_Zigbee_Off(); delay_ms(1000); }; } void Uart_task(void *pdata) { INT8U err; u8 i; u32 * icpandictprt; int ICP_200msADSum=0; uint16_t temp=0; uint8_t USART2_Value_H =0; uint8_t USART2_Value_L =0; short ICP_200msADMean; while(1) { // ?????????????????×???· icpandictprt = (u32*)OSMboxPend(Mbox_ICPandICT,30,&err); /// 200ms???ù?ù???? OSSchedLock(); for(i=0;i<ICPandICT_200msData_Quantity;i++) { ICP_200msADSum += ((short)(icpandictprt&0x0000ffff)); //??16????SDADC1×????á??--ICP } OSSchedUnlock(); ICP_200msADMean = ICP_200msADSum / ICPandICT_200msData_Quantity; ICP_200msADSum = 0; temp=ICP_200msADMean; USART2_Value_H=ICP_200msADMean>>8; USART_SendData(USART2,USART2_Value_H); while(USART_GetFlagStatus(USART2,USART_FLAG_TC)!=SET); USART2_Value_L =(temp<<8)>>8; USART_SendData(USART2,USART2_Value_L); while(USART_GetFlagStatus(USART2,USART_FLAG_TC)!=SET); Uart_count++; delay_ms(1000); } }[/mw_shl_code]

以上为ucos任务

[mw_shl_code=c,true] void DMA2_Channel3_IRQHandler(void) { OS_CPU_SR cpu_sr = 0u; OS_ENTER_CRITICAL(); OSIntNesting++; OS_EXIT_CRITICAL(); /* ????DMA?????ê??????±ê?? */ DMA_ClearITPendingBit(DMA2_IT_TC3); OSMboxPost(Mbox_ICPandICT,ICPandICT_200msData); //????????????×????á??·????????ù???? OSIntExit(); } [/mw_shl_code]
DMA中断
[mw_shl_code=c,true]static void DMA_Config(void) { DMA_InitTypeDef DMA_InitStructure; NVIC_InitTypeDef NVIC_InitStructure; /* ?±?????? */ RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA2, ENABLE); /* ????DMA???¨?????? */ DMA_DeInit(DMA2_Channel3); DMA_InitStructure.DMA_PeripheralBaseAddr = SDADC_JDR_ADDR; DMA_InitStructure.DMA_MemoryBaseAddr = (u32)&ICPandICT_200msData; DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC; DMA_InitStructure.DMA_BufferSize = ICPandICT_DMA_BufferSize; DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable; DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable; DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Word; DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Word; DMA_InitStructure.DMA_Mode = DMA_Mode_Circular; DMA_InitStructure.DMA_Priority = DMA_Priority_High; DMA_InitStructure.DMA_M2M = DMA_M2M_Disable; DMA_Init(DMA2_Channel3, &DMA_InitStructure); /* ????DMA???????????? */ NVIC_InitStructure.NVIC_IRQChannel = DMA2_Channel3_IRQn; NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 3; NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0; NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; NVIC_Init(&NVIC_InitStructure); /* ????DMA?????ê?????? */ DMA_ITConfig(DMA2_Channel3,DMA_IT_TC,ENABLE); /* Enable DMA2 Channel3 */ DMA_Cmd(DMA2_Channel3, ENABLE); }[/mw_shl_code]

[mw_shl_code=c,true]void uart2_Init(u32 bound) { //GPIO?????è?? GPIO_InitTypeDef GPIO_InitStructure; USART_InitTypeDef USART_InitStructure; NVIC_InitTypeDef NVIC_InitStructure; RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOB ,ENABLE); RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2,ENABLE);//????USART2?±?? //?®??2???????????????? GPIO_PinAFConfig(GPIOB,GPIO_PinSource3,GPIO_AF_7); //GPIOB3??????USART2 GPIO_PinAFConfig(GPIOB,GPIO_PinSource4,GPIO_AF_7); //GPIOB4??????USART2 //USART2???????? GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3|GPIO_Pin_4; //GPIOA2??GPIOA3 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;//???????? GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; //????50MHz GPIO_InitStructure.GPIO_OType = GPIO_OType_PP; //???ì???????? GPIO_Init(GPIOB,&GPIO_InitStructure); //??????PB3??PB4 //USART2 ???????è?? USART_DeInit(USART2); USART_InitStructure.USART_BaudRate = bound;//?¨?????è?? USART_InitStructure.USART_WordLength = USART_WordLength_8b;//×??¤??8?????????? USART_InitStructure.USART_StopBits = USART_StopBits_1;//?????????? USART_InitStructure.USART_Parity = USART_Parity_No;//?????????é?? USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;//???????????÷???? USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx; //??·????? USART_Init(USART2, &USART_InitStructure); //???????®??2 // USART_ITConfig(USART2,USART_IT_RXNE,ENABLE); //???????????? USART_ClearFlag(USART2, USART_FLAG_TC); NVIC_InitStructure.NVIC_IRQChannel = USART2_IRQn;//?®??2?????¨?? NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=3;//??????????3 NVIC_InitStructure.NVIC_IRQChannelSubPriority =0; //×???????3 NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //IRQ?¨?????? NVIC_Init(&NVIC_InitStructure); //?ù?????¨????????????VIC?????÷?? NVIC_EnableIRQ(USART2_IRQn); // USART_ITConfig(USART2, USART_IT_RXNE, ENABLE);//?????à?????? USART_Cmd(USART2, ENABLE); //?????®??2 #if EN_USART2_RX //Usart2 NVIC ???? #endif } [/mw_shl_code]