usart_simulator_example1.c File Reference

USART Example application for AVR UC3 USART driver.

Copyright (c) 2014-2018 Microchip Technology Inc. and its subsidiaries.

#include <stdint.h>
#include "usart.h"
#include "board.h"
#include "sysclk.h"
#include "gpio.h"
#include "conf_board.h"
#include "conf_clock.h"
#include "conf_example.h"

Functions
int	main (void)
	Application main loop. More...

Variables
static const gpio_map_t	usart_gpio_map
	USART configuration options. More...
static const usart_options_t	usart_options
	USART options for enabling local loopback mode. More...

int main

(

void

)

Application main loop.

The main function does the following:

• Configures the USART module
• Performs loopback transfer of data
• Enters an infinite loop on completion of example

Note

Use no compiler optimization to be able to watch test_in in the watch window.

Note

Call to sysclk_init() will disable all non-vital peripheral clocks, except for the peripheral clocks explicitly enabled in conf_clock.h.

References cpu_relax, EXAMPLE_USART, gpio_enable_module(), i, sysclk_enable_peripheral_clock(), sysclk_get_pba_hz(), sysclk_init(), usart_getchar(), usart_init_rs232(), and usart_putchar().

const gpio_map_t usart_gpio_map

static

Initial value:

= {
    {EXAMPLE_USART_RX_PIN, EXAMPLE_USART_RX_FUNCTION},
    {EXAMPLE_USART_TX_PIN, EXAMPLE_USART_TX_FUNCTION}
}

USART configuration options.

This struct contains the configuration options for the USART module in use by the example application.GPIO mapping for USART1 module

Referenced by main().

const usart_options_t usart_options

static

Initial value:

= {
    .baudrate     = EXAMPLE_USART_BAUD,
    .charlength   = 8,
    .paritytype   = USART_NO_PARITY,
    .stopbits     = USART_1_STOPBIT,
    .channelmode  = USART_LOCAL_LOOPBACK
}

USART options for enabling local loopback mode.