111 lines
3.7 KiB
C
111 lines
3.7 KiB
C
/*
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* Copyright (c) 2016, Indian Institute of Science <http://www.iisc.ernet.in>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* This file is part of the Contiki operating system.
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*
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*/
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/**
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* \addtogroup cc2538-examples
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* @{
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*
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* \defgroup cc2538-test-uart Test the CC2538 UART
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*
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* Demonstrates the use of the CC2538 UART
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*
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* @{
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*
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* \file
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* A quick program for testing the UART1 on the cc2538 based
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* platform which can be used to interface with sensor with UART
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* interface and to communicate with other development boards
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* \author
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* Akshay P M <akshaypm@ece.iisc.ernet.in>
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*/
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/*---------------------------------------------------------------------------*/
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#include "contiki.h"
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#include "sys/etimer.h"
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#include "dev/leds.h"
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#include "dev/uart.h"
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#include "dev/serial-line.h"
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#include <stdio.h>
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#include <stdint.h>
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/*---------------------------------------------------------------------------*/
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static struct etimer et;
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/*---------------------------------------------------------------------------*/
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PROCESS(cc2538_uart_demo_process, "cc2538 uart demo");
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AUTOSTART_PROCESSES(&cc2538_uart_demo_process);
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/*---------------------------------------------------------------------------*/
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unsigned int
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uart1_send_bytes(const unsigned char *s, unsigned int len)
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{
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unsigned int i = 0;
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while(s && *s != 0) {
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if(i >= len) {
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break;
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}
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uart_write_byte(1, *s++);
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i++;
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}
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return i;
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}
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/*---------------------------------------------------------------------------*/
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PROCESS_THREAD(cc2538_uart_demo_process, ev, data)
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{
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char *rxdata;
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static uint16_t count=0;
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char string[20];
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PROCESS_BEGIN();
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uart_set_input(1, serial_line_input_byte);
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etimer_set(&et, CLOCK_SECOND * 4);
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leds_toggle(LEDS_GREEN);
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while(1) {
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PROCESS_WAIT_UNTIL(etimer_expired(&et));
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sprintf(string, "sending string %u.\n", ++count);
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uart1_send_bytes((uint8_t *)string, sizeof(string) - 1);
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etimer_reset(&et);
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printf("string is being sent\n");
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PROCESS_YIELD();
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if(ev == serial_line_event_message) {
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leds_toggle(LEDS_RED);
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rxdata = data;
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printf("Data received over UART %s\n", rxdata);
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}
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}
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PROCESS_END();
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}
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/*---------------------------------------------------------------------------*/
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/**
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* @}
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* @}
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*/
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