USART driver for AVR XMEGA.
Copyright (c) 2009-2018 Microchip Technology Inc. and its subsidiaries.
#include <stdint.h>#include "compiler.h"#include "usart.h"#include "sysclk.h"#include "ioport.h"#include "status_codes.h"Macros | |
| #define | USART_DORD_bm 0x04 |
| #define | USART_UCPHA_bm 0x02 |
Functions | |
| static uint8_t | usart_get_baud_offset (uint32_t baud) |
| Get the offset for lookup in the baudrate table. More... | |
| uint8_t | usart_getchar (USART_t *usart) |
| Receive a data with the USART module. More... | |
| bool | usart_init_rs232 (USART_t *usart, const usart_rs232_options_t *opt) |
| Initialize USART in RS232 mode. More... | |
| void | usart_init_spi (USART_t *usart, const usart_spi_options_t *opt) |
| Initialize USART in SPI master mode. More... | |
| enum status_code | usart_putchar (USART_t *usart, uint8_t c) |
| Send a data with the USART module. More... | |
| bool | usart_set_baudrate (USART_t *usart, uint32_t baud, uint32_t cpu_hz) |
| Set the baudrate value in the USART module. More... | |
| void | usart_set_baudrate_precalculated (USART_t *usart, uint32_t baud, uint32_t cpu_hz) |
| Set the baudrate using precalculated BAUDCTRL values from PROGMEM. More... | |
| void | usart_set_bsel_bscale_value (USART_t *usart, uint16_t bsel, uint8_t bscale) |
| Set the baudrate by setting the BSEL and BSCALE values in the USART. More... | |
| void | usart_spi_set_baudrate (USART_t *usart, uint32_t baud, uint32_t cpu_hz) |
| Set the baudrate value in the USART_SPI module. More... | |
| #define USART_DORD_bm 0x04 |
Referenced by usart_init_spi().
| #define USART_UCPHA_bm 0x02 |
Referenced by usart_init_spi().
|
static |
Get the offset for lookup in the baudrate table.
| baud | The requested baudrate |
| USART_BAUD_UNDEFINED | for baudrates not in lookup table |
References USART_BAUD_1200, USART_BAUD_19200, USART_BAUD_2400, USART_BAUD_38400, USART_BAUD_4800, USART_BAUD_57600, USART_BAUD_9600, and USART_BAUD_UNDEFINED.
Referenced by usart_set_baudrate_precalculated().
1.8.5