コード例 #1
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uint8_t TM_USART_DMA_Sending(USART_TypeDef* USARTx) {
	/* Get USART settings */
	TM_USART_DMA_INT_t* Settings = TM_USART_DMA_INT_GetSettings(USARTx);
	
	/* Check DMA Stream register of remaining data bytes */
	return Settings->DMA_Stream->NDTR;
}
コード例 #2
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void TM_USART_DMA_Init(USART_TypeDef* USARTx) {
	/* Init DMA TX mode */
	/* Assuming USART is already initialized and clock is enabled */
	
	/* Get USART settings */
	TM_USART_DMA_INT_t* USART_Settings = TM_USART_DMA_INT_GetSettings(USARTx);
	
	/* Enable DMA clock */
	if (USART_Settings->DMA_Stream >= DMA2_Stream0) {
		/* Enable DMA2 clock */	
		RCC->AHB1ENR |= RCC_AHB1ENR_DMA2EN;
	} else {
		/* Enable DMA1 clock */
		RCC->AHB1ENR |= RCC_AHB1ENR_DMA1EN;
	}
	
	/* Set DMA options */
	DMA_InitStruct.DMA_DIR = DMA_DIR_MemoryToPeripheral;
	DMA_InitStruct.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
	DMA_InitStruct.DMA_MemoryInc = DMA_MemoryInc_Enable;
	DMA_InitStruct.DMA_PeripheralDataSize = DMA_MemoryDataSize_Byte;
	DMA_InitStruct.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte;
	DMA_InitStruct.DMA_Mode = DMA_Mode_Normal;
	DMA_InitStruct.DMA_Priority = DMA_Priority_Low;
	DMA_InitStruct.DMA_FIFOMode = DMA_FIFOMode_Disable;
	DMA_InitStruct.DMA_FIFOThreshold = DMA_FIFOThreshold_1QuarterFull;
	DMA_InitStruct.DMA_MemoryBurst = DMA_MemoryBurst_Single;
	DMA_InitStruct.DMA_PeripheralBurst = DMA_PeripheralBurst_Single;
}
コード例 #3
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void TM_USART_DMA_Deinit(USART_TypeDef* USARTx) {
	/* Get USART settings */
	TM_USART_DMA_INT_t* Settings = TM_USART_DMA_INT_GetSettings(USARTx);
	
	/* Deinit DMA Stream */
	DMA_DeInit(Settings->DMA_Stream);
}
コード例 #4
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uint8_t TM_USART_DMA_Send(USART_TypeDef* USARTx, uint8_t* DataArray, uint16_t count) {
	/* Get USART settings */
	TM_USART_DMA_INT_t* Settings = TM_USART_DMA_INT_GetSettings(USARTx);
	
	/* Check if DMA is working now */
	if (Settings->DMA_Stream->NDTR) {
		/* DMA works right now */
		return 0;
	}
	
	/* Set DMA options */
	DMA_InitStruct.DMA_Channel = Settings->DMA_Channel;
	DMA_InitStruct.DMA_BufferSize = count;
	DMA_InitStruct.DMA_PeripheralBaseAddr = (uint32_t) &USARTx->DR;
	DMA_InitStruct.DMA_Memory0BaseAddr = (uint32_t) &DataArray[0];
	
	/* Deinit first, clear all flags */
	DMA_DeInit(Settings->DMA_Stream);
	
	/* Init DMA */
	DMA_Init(Settings->DMA_Stream, &DMA_InitStruct);
	
	/* Enable USART TX DMA */
	USARTx->CR3 |= USART_CR3_DMAT;

	/* Enable DMA Stream */
	Settings->DMA_Stream->CR |= DMA_SxCR_EN;
	
	/* DMA has started */
	return 1;
}
コード例 #5
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void TM_USART_DMA_DisableInterrupts(USART_TypeDef* USARTx) {
	/* Get USART settings */
	TM_USART_DMA_INT_t* Settings = TM_USART_DMA_INT_GetSettings(USARTx);
	
	/* Disable DMA interrupts */
	TM_DMA_DisableInterrupts(Settings->DMA_Stream);
}
コード例 #6
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void TM_USART_DMA_InitWithStreamAndChannel(USART_TypeDef* USARTx, DMA_Stream_TypeDef* DMA_Stream, uint32_t DMA_Channel) {
	/* Get USART settings */
	TM_USART_DMA_INT_t* Settings = TM_USART_DMA_INT_GetSettings(USARTx);
	
	/* Set DMA stream and channel */
	Settings->DMA_Stream = DMA_Stream;
	Settings->DMA_Channel = DMA_Channel;
	
	/* Init DMA TX */
	TM_USART_DMA_Init(USARTx);
}
コード例 #7
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uint16_t TM_USART_DMA_Sending(USART_TypeDef* USARTx) {
	/* Get USART settings */
	TM_USART_DMA_INT_t* Settings = TM_USART_DMA_INT_GetSettings(USARTx);
	
	/* DMA has work to do still */
	if (Settings->DMA_Stream->NDTR) {
		return 1;
	}

	/* Check DMA Stream register of remaining data bytes */
	return !USART_TXEMPTY(USARTx);
}
コード例 #8
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void TM_USART_DMA_Init(USART_TypeDef* USARTx) {
	/* Init DMA TX mode */
	/* Assuming USART is already initialized and clock is enabled */
	
	/* Get USART settings */
	TM_USART_DMA_INT_t* Settings = TM_USART_DMA_INT_GetSettings(USARTx);
	
	/* Init stream */
	TM_DMA_Init(Settings->DMA_Stream, NULL);
	
	/* Clear flags */
	TM_DMA_ClearFlags(Settings->DMA_Stream);
	
	/* Disable stream */
	Settings->DMA_Stream->CR &= ~DMA_SxCR_EN;
	
	/* Reset NDTR register */
	Settings->DMA_Stream->NDTR = 0;
}
コード例 #9
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uint8_t TM_USART_DMA_Send(USART_TypeDef* USARTx, uint8_t* DataArray, uint16_t count) {
	DMA_HandleTypeDef DMA_InitStruct;
	
	/* Get USART settings */
	TM_USART_DMA_INT_t* Settings = TM_USART_DMA_INT_GetSettings(USARTx);
	
	/* Check if DMA is working now */
	if (Settings->DMA_Stream->NDTR) {
		/* DMA works right now */
		return 0;
	}
	
	/* Set DMA options */
	DMA_InitStruct.Instance = Settings->DMA_Stream;
	DMA_InitStruct.Init.Channel = Settings->DMA_Channel;
	DMA_InitStruct.Init.Direction = DMA_MEMORY_TO_PERIPH;
	DMA_InitStruct.Init.PeriphInc = DMA_PINC_DISABLE;
	DMA_InitStruct.Init.MemInc = DMA_MINC_ENABLE;
	DMA_InitStruct.Init.PeriphDataAlignment = DMA_PDATAALIGN_BYTE;
	DMA_InitStruct.Init.MemDataAlignment = DMA_MDATAALIGN_BYTE;
	DMA_InitStruct.Init.Mode = DMA_NORMAL;
	DMA_InitStruct.Init.Priority = DMA_PRIORITY_LOW;
	DMA_InitStruct.Init.FIFOMode = DMA_FIFOMODE_DISABLE;
	DMA_InitStruct.Init.FIFOThreshold = DMA_FIFO_THRESHOLD_FULL;
	DMA_InitStruct.Init.MemBurst = DMA_MBURST_SINGLE;
	DMA_InitStruct.Init.PeriphBurst = DMA_PBURST_SINGLE;
	
	/* Deinit first, clear all flags */
	TM_DMA_ClearFlags(Settings->DMA_Stream);
	
	/* Init HAL */
	TM_DMA_Init(Settings->DMA_Stream, &DMA_InitStruct);
	
	/* Start transfer */
	TM_DMA_Start(&DMA_InitStruct, (uint32_t) &DataArray[0], (uint32_t) &USART_TX_REG(USARTx), count);
	
	/* Enable USART TX DMA */
	USARTx->CR3 |= USART_CR3_DMAT;
	
	/* DMA has started */
	return 1;
}
コード例 #10
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DMA_Stream_TypeDef* TM_USART_DMA_GetStream(USART_TypeDef* USARTx) {
	/* Get USART settings */
	return TM_USART_DMA_INT_GetSettings(USARTx)->DMA_Stream;
}