USART driver for AVR MEGA.
Copyright (c) 2015-2018 Microchip Technology Inc. and its subsidiaries.
#include <stdint.h>#include "compiler.h"#include "usart_mega.h"#include "sysclk.h"#include "ioport.h"#include "status_codes.h"Functions | |
| static void | usart_enable_module_clock (USART_t *usart) |
| Enable the system clock to an USART module. More... | |
| 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... | |
| status_code_t | 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 pre calculated BAUDCTRL values stored in program memory. 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... | |
|
inlinestatic |
Enable the system clock to an USART module.
This function will enable the system clock to the provided
usart Pointer to an USART module.
References PRUSART0_bm, and sysclk_enable_module().
Referenced by usart_init_rs232(), and 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