usart_irda_example.c File Reference

USART IrDA example for SAM.

Copyright (c) 2011-2018 Microchip Technology Inc. and its subsidiaries.

#include <string.h>
#include "asf.h"
#include "stdio_serial.h"
#include "conf_board.h"
#include "conf_clock.h"
#include "conf_example.h"

Macros
#define	ALL_INTERRUPT_MASK   0xffffffff
	All interrupt mask. More...
#define	BUFFER_SIZE   10
	Buffer size for PDC transfer. More...
#define	STATE_IDLE   3
#define	STATE_RECEIVE   1
#define	STATE_TRANSMIT   0
	Communication state. More...
#define	STRING_EOL   "\r"
#define	STRING_HEADER

Functions
static void	configure_console (void)
	Configure UART for debug message output. More...
static void	configure_usart (void)
	Configure board USART communication with PC or other terminal. More...
static void	dump_recv_buf (uint8_t *p_buf, uint8_t uc_size)
	Dump received buffer to uart. More...
static void	func_receiver (void)
	Disable transmitter and Enable receiver. More...
static void	func_transmitter (void)
	Disable receiver and Enable transmitter. More...
int	main (void)
	Application entry point. More...
void	USART_Handler (void)
	USART IRQ Handler, handling RXBUFF and TXBUFE status. More...

Variables
Pdc *	g_p_pdc
	Pointer to PDC register base. More...
pdc_packet_t	g_st_packet
	PDC data packet. More...
uint8_t	g_uc_recv_data [BUFFER_SIZE] = { 0x0 }
	Data buffer for receiving. More...
uint8_t	g_uc_send_data [BUFFER_SIZE]
	Data buffer for transmitting. More...
uint8_t	g_uc_state = STATE_IDLE
	State of BOARD_USART_BASE. More...
volatile uint32_t	g_ul_recv_done = false
	Receiving Done status. More...
volatile uint32_t	g_ul_sent_done = false
	Transmitting Done status. More...

#define ALL_INTERRUPT_MASK   0xffffffff

All interrupt mask.

Referenced by configure_usart().

#define BUFFER_SIZE   10

Buffer size for PDC transfer.

Referenced by main().

#define STATE_IDLE   3

Referenced by main().

#define STATE_RECEIVE   1

Referenced by main(), and USART_Handler().

#define STATE_TRANSMIT   0

Communication state.

Referenced by main(), and USART_Handler().

#define STRING_EOL   "\r"

#define STRING_HEADER

Value:

"--USART IrDA Example --\r\n" \
        "-- "BOARD_NAME" --\r\n" \
        "-- Compiled: "__DATE__" "__TIME__" --"STRING_EOL

Referenced by main().

static void configure_console ( void  )

static

Configure UART for debug message output.

References uart_rs232_options::baudrate, CONF_UART, CONF_UART_BAUDRATE, CONF_UART_PARITY, stdio_serial_init(), and sysclk_enable_peripheral_clock().

Referenced by main().

static void configure_usart ( void  )

static

Configure board USART communication with PC or other terminal.

References ALL_INTERRUPT_MASK, sysclk_enable_peripheral_clock(), sysclk_get_peripheral_hz(), usart_disable_interrupt(), usart_enable_rx(), usart_enable_tx(), and usart_init_irda().

static void dump_recv_buf ( uint8_t *  p_buf, uint8_t  uc_size  )

static

Dump received buffer to uart.

Parameters

p_buf	Pointer to received buffer.
uc_size	The size of the buffer.

Referenced by main().

static void func_receiver ( void  )

static

Disable transmitter and Enable receiver.

References pio_configure_pin(), pio_set_pin_low(), UNUSED, usart_disable_tx(), usart_enable_rx(), usart_is_rx_ready(), and usart_read().

Referenced by main().

static void func_transmitter ( void  )

static

Disable receiver and Enable transmitter.

References pio_configure_pin(), usart_disable_rx(), and usart_enable_tx().

Referenced by main().

int main

(

void

)

Application entry point.

Initialize the IrDA and start the main loop.

Returns

Unused (ANSI-C compatibility).

References board_init(), BUFFER_SIZE, configure_console(), configure_usart(), dump_recv_buf(), func_receiver(), func_transmitter(), g_p_pdc, g_uc_recv_data, g_uc_send_data, g_uc_state, g_ul_recv_done, g_ul_sent_done, NULL, pdc_enable_transfer(), pdc_rx_init(), pdc_tx_init(), STATE_IDLE, STATE_RECEIVE, STATE_TRANSMIT, STRING_HEADER, sysclk_init(), uart_read(), pdc_packet::ul_addr, pdc_packet::ul_size, usart_enable_interrupt(), and usart_get_pdc_base().

void USART_Handler

(

void

)

USART IRQ Handler, handling RXBUFF and TXBUFE status.

References g_uc_state, g_ul_recv_done, g_ul_sent_done, STATE_RECEIVE, STATE_TRANSMIT, usart_disable_interrupt(), and usart_get_status().

Pdc* g_p_pdc

Pointer to PDC register base.

pdc_packet_t g_st_packet

PDC data packet.

uint8_t g_uc_recv_data[BUFFER_SIZE] = { 0x0 }

Data buffer for receiving.

Referenced by main().

uint8_t g_uc_send_data[BUFFER_SIZE]

Initial value:

=
        { 0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89 }

Data buffer for transmitting.

Referenced by main().

uint8_t g_uc_state = STATE_IDLE

State of BOARD_USART_BASE.

volatile uint32_t g_ul_recv_done = false

Receiving Done status.

volatile uint32_t g_ul_sent_done = false

Transmitting Done status.