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uart: add ability to configure byte length

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Signed-off-by: Jean-Nicolas Graux <nicogrx@gmail.com>
This commit is contained in:
Jean-Nicolas Graux 2018-03-25 21:48:14 +02:00
parent a89417e26e
commit 8cb769d55d
2 changed files with 17 additions and 0 deletions
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10
core/include/esp/uart.h
View file

@ -160,4 +160,14 @@ static inline UART_Parity uart_get_parity(int uart_num) {
return (UART_Parity)((UART(uart_num).CONF0 & UART_CONF0_PARITY) != 0);
}
/* Set uart data bits length to the desired value */
static inline void uart_set_byte_length(int uart_num, UART_ByteLength byte_length) {
UART(uart_num).CONF0 = SET_FIELD(UART(uart_num).CONF0, UART_CONF0_BYTE_LEN, byte_length);
}
/* Returns the current data bits length for the UART */
static inline UART_ByteLength uart_get_byte_length(int uart_num) {
return (UART_ByteLength)(FIELD2VAL(UART_CONF0_BYTE_LEN, UART(uart_num).CONF0));
}
#endif /* _ESP_UART_H */

7
core/include/esp/uart_regs.h
View file

@ -62,6 +62,13 @@ typedef enum {
UART_PARITY_ODD = 0b1
} UART_Parity;
typedef enum {
UART_BYTELENGTH_5 = 0b00,
UART_BYTELENGTH_6 = 0b01,
UART_BYTELENGTH_7 = 0b10,
UART_BYTELENGTH_8 = 0b11,
} UART_ByteLength;
/* Details for FIFO register */
#define UART_FIFO_DATA_M 0x000000ff