Library Functions. More...

Functions
void	TM_USART_DMA_Init (USART_TypeDef *USARTx)
	Initializes USART DMA TX functionality. More...

void	TM_USART_DMA_InitWithStreamAndChannel (USART_TypeDef USARTx, DMA_Stream_TypeDef DMA_Stream, uint32_t DMA_Channel)
	Initializes USART DMA TX functionality with custom DMA stream and Channel options. More...

void	TM_USART_DMA_Deinit (USART_TypeDef *USARTx)
	Deinitializes USART DMA TX functionality. More...

void	TM_USART_DMA_EnableInterrupts (USART_TypeDef *USARTx)
	Enables interrupts for DMA for USART streams. More...

void	TM_USART_DMA_DisableInterrupts (USART_TypeDef *USARTx)
	Disables interrupts for DMA for USART streams. More...

DMA_Stream_TypeDef *	TM_USART_DMA_GetStreamTX (USART_TypeDef *USARTx)
	Gets poitner to DMA TX stream for desired USART. More...

uint8_t	TM_USART_DMA_Puts (USART_TypeDef USARTx, char str)
	Puts string to USART port with DMA. More...

uint8_t	TM_USART_DMA_Send (USART_TypeDef USARTx, uint8_t DataArray, uint16_t count)
	Sends data over USART with DMA TX functionality. More...

uint16_t	TM_USART_DMA_Transmitting (USART_TypeDef *USARTx)
	Checks if USART DMA TX is still sending data. More...

Detailed Description

Library Functions.

Function Documentation

void TM_USART_DMA_Deinit ( USART_TypeDef * USARTx )

Deinitializes USART DMA TX functionality.

Parameters

*USARTx Pointer to USARTx where you want to disable DMA TX mode

Return values

None

void TM_USART_DMA_DisableInterrupts ( USART_TypeDef * USARTx )

Disables interrupts for DMA for USART streams.

Parameters

*USARTx Pointer to USARTx where DMA interrupts will be disabled

Return values

None

void TM_USART_DMA_EnableInterrupts ( USART_TypeDef * USARTx )

Enables interrupts for DMA for USART streams.

Note: USART DMA must be initialized first using TM_USART_DMA_Init() or TM_USART_DMA_InitWithStreamAndChannel() functions

Parameters

*USARTx Pointer to USARTx where DMA interrupts will be enabled

Return values

None

DMA_Stream_TypeDef* TM_USART_DMA_GetStreamTX ( USART_TypeDef * USARTx )

Gets poitner to DMA TX stream for desired USART.

Parameters

*USARTx Pointer to USART where you wanna get its stream pointer

Return values

Pointer to DMA stream for desired USART

void TM_USART_DMA_Init ( USART_TypeDef * USARTx )

Initializes USART DMA TX functionality.

Note: USART HAVE TO be previously initialized using TM_USART library

Parameters

*USARTx Pointer to USARTx where you want to enable DMA TX mode

Return values

None

void TM_USART_DMA_InitWithStreamAndChannel	(	USART_TypeDef *	USARTx,
		DMA_Stream_TypeDef *	DMA_Stream,
		uint32_t	DMA_Channel
	)

Initializes USART DMA TX functionality with custom DMA stream and Channel options.

Note: USART HAVE TO be previously initialized using TM_USART library; Use this function only in case default Stream and Channel settings are not good for you

Parameters

*USARTx	Pointer to USARTx where you want to enable DMA TX mode
*DMA_Stream	Pointer to DMAy_Streamx, where y is DMA (1 or 2) and x is Stream (0 to 7)
DMA_Channel	Select DMA channel for your USART in specific DMA Stream

Return values

None

uint8_t TM_USART_DMA_Puts	(	USART_TypeDef *	USARTx,
		char *	str
	)

Puts string to USART port with DMA.

Note: Try not to use local variables pointers for DMA memory as parameter *str

Parameters

*USARTx	Pointer to USARTx peripheral you will use
*str	Pointer to string to send over USART with DMA

Return values

Sending

started status:

0: DMA has not started with sending data
> 0: DMA has started with sending data

uint8_t TM_USART_DMA_Send	(	USART_TypeDef *	USARTx,
		uint8_t *	DataArray,
		uint16_t	count
	)

Sends data over USART with DMA TX functionality.

Note: Try not to use local variables pointers for DMA memory as parameter *str

Parameters

*USARTx	Pointer to USARTx to use for send
*DataArray	Pointer to array of data to be sent over USART
count	Number of data bytes to be sent over USART with DMA

Return values

Sending

started status:

0: DMA has not started with sending data
> 0: DMA has started with sending data

uint16_t TM_USART_DMA_Transmitting ( USART_TypeDef * USARTx )

Checks if USART DMA TX is still sending data.

Parameters

*USARTx Pointer to USARTx where you want to check if DMA is still working

Return values

Sending

status:

0: USART does not sending anymore
> 0: USART DMA is still sending data