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lm4f: Add basic UART implementation

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Add basic functionality needed to setup the UART and send/recieve data.
Interrupts, DMA, and more advanced features are not implemented in this patch.

Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
This commit is contained in:
Alexandru Gagniuc
2012-11-23 21:25:25 -06:00
committed by Piotr Esden-Tempski
parent a105bcaa83
commit 8112861b60
3 changed files with 469 additions and 1 deletions
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55
include/libopencm3/lm4f/uart.h
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@@ -357,6 +357,61 @@
#define UART_CC_CS_SYSCLK (0x0 << 0)
#define UART_CC_CS_PIOSC (0x5 << 0)
/* =============================================================================
* Convenience enums
* ---------------------------------------------------------------------------*/
enum uart_parity {
UART_PARITY_NONE,
UART_PARITY_ODD,
UART_PARITY_EVEN,
UART_PARITY_STICK_0,
UART_PARITY_STICK_1,
};
enum uart_flowctl {
UART_FLOWCTL_NONE,
UART_FLOWCTL_RTS,
UART_FLOWCTL_CTS,
UART_FLOWCTL_RTS_CTS,
};
/* =============================================================================
* Function prototypes
* ---------------------------------------------------------------------------*/
BEGIN_DECLS
void uart_set_baudrate(u32 uart, u32 baud);
void uart_set_databits(u32 uart, u8 databits);
void uart_set_stopbits(u32 uart, u8 stopbits);
void uart_set_parity(u32 uart, enum uart_parity parity);
void uart_set_mode(u32 uart, u32 mode);
void uart_set_flow_control(u32 uart, enum uart_flowctl flow);
void uart_enable(u32 uart);
void uart_disable(u32 uart);
void uart_clock_from_piosc(u32 uart);
void uart_clock_from_sysclk(u32 uart);
void uart_send(u32 uart, u16 data);
u16 uart_recv(u32 uart);
void uart_wait_send_ready(u32 uart);
void uart_wait_recv_ready(u32 uart);
void uart_send_blocking(u32 uart, u16 data);
u16 uart_recv_blocking(u32 uart);
void uart_enable_rx_dma(u32 uart);
void uart_disable_rx_dma(u32 uart);
void uart_enable_tx_dma(u32 uart);
void uart_disable_tx_dma(u32 uart);
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);
END_DECLS
/**@}*/
#endif /* LIBOPENCM3_LM4F_UART_H */