ucos 的DMA以及串口问题

xiaoleiqusheng · 发表于 2015-1-4 09:59:38

1. 我原先是库函数方式没有操作系统实现内部AD+DMA转换，把他移植到ucos中初始化，如果只是用AD转换可以工作，如果用DMA方式就不工作，DMA配置移植到ucos中还需要修改吗，求大神指教，，
2. 我用的是stm32f4，怎么串口不配置他就可以工作，困扰了很多天了，郁闷，不配置就可以用串口调试工具或者终端来发送接收数据，为啥，，求解

[mw_shl_code=c,true]/*DMA·???????AD×???*/ u16 ad_dma[2]={0}; void DMA_Config(void) { DMA_InitTypeDef DMA_InitStruct; ADC_InitTypeDef ADC_InitStructure; ADC_CommonInitTypeDef ADC_CommonInitStructure; RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE); RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_DMA2,ENABLE); ADC_DeInit(); DMA_DeInit(DMA2_Stream0);//????DMA2?????÷0 //DMA_InitStruct.DMA_PeripheralBaseAddr=ADC_DR_ADDR; DMA_InitStruct.DMA_Channel = DMA_Channel_0; DMA_InitStruct.DMA_PeripheralBaseAddr =0X4001204C;//?¨??DMA ?¨?????è?ù???· ADC1_BASE+0X04C; ADC->DR???·??ADC1-ADC2-ADC3??0X40012000-0X400123FF; ??????ADC1??0X000-0X04C; ADC2??0X100-0X14C; ADC3??0X200-0X24C DMA_InitStruct.DMA_Memory0BaseAddr = (u32)&ad_dma;//??±ê?????????¨??DMA?¨???????÷???· DMA_InitStruct.DMA_DIR = DMA_DIR_PeripheralToMemory; DMA_InitStruct.DMA_BufferSize =2; DMA_InitStruct.DMA_PeripheralInc = DMA_PeripheralInc_Disable;//?±?°???è?????÷???·??±? DMA_InitStruct.DMA_MemoryInc = DMA_MemoryInc_Enable;// ?±?°?????÷???·??±? DMA_InitStruct.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;//?¨?????è?????í????16?? DMA_InitStruct.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord;//?¨???????÷?????í??16?? DMA_InitStruct.DMA_Mode = DMA_Mode_Circular;//DMA?¨????×÷???????·?????????? DMA_InitStruct.DMA_Priority = DMA_Priority_High;//????DMA?¨???????÷???????÷???? DMA_InitStruct.DMA_FIFOMode = DMA_FIFOMode_Disable;//DMA?¨?????????? DMA_InitStruct.DMA_FIFOThreshold = DMA_FIFOThreshold_HalfFull; DMA_InitStruct.DMA_MemoryBurst = DMA_MemoryBurst_Single; DMA_InitStruct.DMA_PeripheralBurst = DMA_PeripheralBurst_Single; DMA_Init(DMA2_Stream0, &DMA_InitStruct); DMA_Cmd(DMA2_Stream0, ENABLE); ADC_CommonInitStructure.ADC_Mode = ADC_Mode_Independent; ADC_CommonInitStructure.ADC_Prescaler = ADC_Prescaler_Div2; ADC_CommonInitStructure.ADC_DMAAccessMode = ADC_DMAAccessMode_Disabled; ADC_CommonInitStructure.ADC_TwoSamplingDelay = ADC_TwoSamplingDelay_5Cycles; ADC_CommonInit(&ADC_CommonInitStructure); ADC_InitStructure.ADC_Resolution = ADC_Resolution_12b;//??????12?? ADC_InitStructure.ADC_ScanConvMode = ENABLE;//?¨?è×????????????????¨???????????????à?¨???ò?è????ENABLE, ADC_InitStructure.ADC_ContinuousConvMode = ENABLE;//DISABLE; //????×??????? /???????ò??????×?????×??????????????è????????·??? ADC_InitStructure.ADC_ExternalTrigConvEdge = ADC_ExternalTrigConvEdge_None;//??????????·????í????·?×??? ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_T1_CC1; //??????????·??????? ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;//??????????????×??????? ADC_InitStructure.ADC_NbrOfConversion = 2;//???¨?????ò???????ò×?????ADC?¨???????? ADC_Init(ADC1, &ADC_InitStructure); ADC_RegularChannelConfig(ADC1, ADC_Channel_8, 1, ADC_SampleTime_3Cycles);//ADC?????¨??8?????ò?÷????1???ù???¨???????ù???? ADC_RegularChannelConfig(ADC1, ADC_Channel_9, 2, ADC_SampleTime_3Cycles);//ADC?????¨??9?????ò?÷????2???ù???¨???????ù???? ADC_DMARequestAfterLastTransferCmd(ADC1, ENABLE); ADC_DMACmd(ADC1, ENABLE); ADC_Cmd(ADC1, ENABLE); ADC_SoftwareStartConv(ADC1); //?í??????×??? }[/mw_shl_code]

xiaoleiqusheng · 发表于 2015-1-5 09:17:46

原子哥以及大神门有遇到的吗，求帮解决，，

正点原子 · 发表于 2015-1-5 23:13:30

回复【2楼】xiaoleiqusheng:
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没遇到过啊

xiaoleiqusheng · 发表于 2015-1-6 10:03:54

回复【3楼】正点原子:
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做了一个显示，DMA_GetFlagStatus(DMA2_Stream2,DMA_FLAG_TCIF2) 这个DMA_flag的值不为1，不知道是DMA没有工作还是什么，真的检查不出来了，快疯了，，

xiaoleiqusheng · 发表于 2015-1-6 10:14:08

为啥我的DMA_GetFlagStatus(DMA2_Stream2,DMA_FLAG_TCIF2) 不工作啊，疯了疯了，求哥哥姐姐们帮忙啊，，

正点原子 · 发表于 2015-1-6 23:26:22

回复【5楼】xiaoleiqusheng:
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我也没辙

xiaoleiqusheng · 发表于 2015-1-7 15:51:35

回复【6楼】正点原子:
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原子哥，emwin的触摸屏程序调用DMA吗，原先自己没有调用配置DMA的时候，触摸屏箭头移动位置有遗留现象，当时也没找到原因所在，我现在配置了DMA之后，光标移动没有了遗留，我用的是emwin5.12，我把触摸屏关掉之后，内部AD+DMA还是不能工作，是不是触摸屏程序里面调用了DMA的原因，，