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lm4f: Implement DMA enable/disable functions for the UART

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Add basic rx/tx_dma_enable/disable functionality.

Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
This commit is contained in:
Alexandru Gagniuc 2013-05-09 00:56:33 -05:00 committed by Piotr Esden-Tempski
parent a8fc67d569
commit 5507e14cd4
1 changed files with 24 additions and 4 deletions
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28
lib/lm4f/uart.c
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@ -517,24 +517,44 @@ void uart_clear_interrupt_flag(u32 uart, enum uart_interrupt_flag ints)
*/
/**@{*/
/**
* \brief Enable the UART Receive DMA.
*
* @param[in] uart UART block register address base @ref uart_reg_base
*/
void uart_enable_rx_dma(u32 uart)
{
/* TODO: this is just a stub. */
UART_DMACTL(uart) |= UART_DMACTL_RXDMAE;
}
/**
* \brief Disable the UART Receive DMA.
*
* @param[in] uart UART block register address base @ref uart_reg_base
*/
void uart_disable_rx_dma(u32 uart)
{
/* TODO: this is just a stub. */
UART_DMACTL(uart) &= ~UART_DMACTL_RXDMAE;
}
/**
* \brief Enable the UART Transmit DMA.
*
* @param[in] uart UART block register address base @ref uart_reg_base
*/
void uart_enable_tx_dma(u32 uart)
{
/* TODO: this is just a stub. */
UART_DMACTL(uart) |= UART_DMACTL_TXDMAE;
}
/**
* \brief Disable the UART Transmit DMA.
*
* @param[in] uart UART block register address base @ref uart_reg_base
*/
void uart_disable_tx_dma(u32 uart)
{
/* TODO: this is just a stub. */
UART_DMACTL(uart) &= ~UART_DMACTL_TXDMAE;
}
/**@}*/