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lm4f: Implement UART interrupt control

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Add a complete API for controlling the UART interrupts.
Doxygen documentation with inline code examples is also provided in this patch.

Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
This commit is contained in:
Alexandru Gagniuc
2013-05-08 02:53:25 -05:00
committed by Piotr Esden-Tempski
parent 8112861b60
commit a8fc67d569
2 changed files with 183 additions and 11 deletions
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46
include/libopencm3/lm4f/uart.h
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@@ -375,6 +375,32 @@ enum uart_flowctl {
UART_FLOWCTL_RTS_CTS,
};
/**
* \brief UART interrupt masks
*
* These masks can be OR'ed together to specify more than one interrupt. For
* example, (UART_INT_TXIM | UART_INT_TXIM) specifies both Rx and Tx Interrupt.
*/
enum uart_interrupt_flag {
UART_INT_LME5 = UART_IM_LME5IM,
UART_INT_LME1 = UART_IM_LME1IM,
UART_INT_LMSB = UART_IM_LMSBIM,
UART_INT_9BIT = UART_IM_9BITIM,
UART_INT_OE = UART_IM_OEIM,
UART_INT_BE = UART_IM_BEIM,
UART_INT_PE = UART_IM_PEIM,
UART_INT_FE = UART_IM_FEIM,
UART_INT_RT = UART_IM_RTIM,
UART_INT_TX = UART_IM_TXIM,
UART_INT_RX = UART_IM_RXIM,
UART_INT_DSR = UART_IM_DSRIM,
UART_INT_DCD = UART_IM_DCDIM,
UART_INT_CTS = UART_IM_CTSIM,
UART_INT_RI = UART_IM_RIIM,
};
/* =============================================================================
* Function prototypes
* ---------------------------------------------------------------------------*/
@@ -403,12 +429,28 @@ void uart_disable_rx_dma(u32 uart);
void uart_enable_tx_dma(u32 uart);
void uart_disable_tx_dma(u32 uart);
void uart_enable_interrupts(u32 uart, enum uart_interrupt_flag ints);
void uart_disable_interrupts(u32 uart, enum uart_interrupt_flag ints);
void uart_enable_rx_interrupt(u32 uart);
void uart_disable_rx_interrupt(u32 uart);
void uart_enable_tx_interrupt(u32 uart);
void uart_disable_tx_interrupt(u32 uart);
bool uart_get_flag(u32 uart, u32 flag);
bool uart_get_interrupt_source(u32 uart, u32 flag);
void uart_clear_interrupt_flag(u32 uart, enum uart_interrupt_flag ints);
/* Let's keep this one inlined. It's designed to be used in ISRs */
/** @ingroup uart_irq
* @{
* \brief Determine if interrupt is generated by the given source
*
* @param[in] uart UART block register address base @ref uart_reg_base
* @param[in] source source to check.
*/
static inline
bool uart_is_interrupt_source(u32 uart, enum uart_interrupt_flag source)
{
return UART_MIS(uart) & source;
}
/**@}*/
END_DECLS