nes-proj/examples/platform-specific/nrf52dk/blink-hello/blink-hello.c

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2016-01-09 13:44:58 +00:00
/* This is a very simple hello_world program.
* It aims to demonstrate the co-existence of two processes:
* One of them prints a hello world message and the other blinks the LEDs
*
* It is largely based on hello_world in $(CONTIKI)/examples/sensinode
*
* Author: George Oikonomou - <oikonomou@users.sourceforge.net>
*/
/**
* \addtogroup nrf52dk nRF52 Development Kit
* @{
*
* \addtogroup nrf52dk-examples Demo projects for nRF52 DK
* @{
*
* \defgroup nrf52dk-blink-hello Basic sensors and LEDs demo
* @{
*
* This demo demonstrates use of Contiki processes, sensors, and LEDs
* on nRF52 DK. Pressing a button will start a timer that blinks a
* respective LED (e.g., button 1 controls LED 1). Each time the button
* is pressed blinking frequency is doubled. On 4th press the LED is
* switched off and the sequence can be started from the beginning.
*
* \file Main file for Basic sensors and LEDs demo.
*/
#include <stdio.h> /* For printf() */
#include <inttypes.h>
#include "contiki.h"
#include "dev/leds.h"
#include "dev/temperature-sensor.h"
#include "lib/sensors.h"
#include "button-sensor.h"
/*---------------------------------------------------------------------------*/
PROCESS(blink_process_1, "LED1 blink process");
PROCESS(blink_process_2, "LED2 blink process");
PROCESS(blink_process_3, "LED3 blink process");
PROCESS(blink_process_4, "LED4 blink process");
PROCESS(temp, "Temperautre");
AUTOSTART_PROCESSES(
&blink_process_1,
&blink_process_2,
&blink_process_3,
&blink_process_4,
&temp
);
struct blink_process_ctx {
struct etimer et_blink;
unsigned char c;
const struct sensors_sensor *button;
unsigned char led;
};
static void handle_event(process_event_t ev, process_data_t data, struct blink_process_ctx *ctx)
{
if (ev == PROCESS_EVENT_TIMER && etimer_expired(&ctx->et_blink)) {
leds_toggle(ctx->led);
etimer_set(&ctx->et_blink, CLOCK_SECOND / ctx->c);
printf("Blink %d\n", ctx->led);
} else if (ev == sensors_event && data == ctx->button) {
if (ctx->button->value(BUTTON_SENSOR_VALUE_STATE) == 0) {
if (ctx->c == 0) {
ctx->c = 1;
} else if (ctx->c < 8){
ctx->c <<= 1;
} else {
ctx->c = 0;
leds_off(ctx->led);
}
if (ctx->c) {
etimer_set(&ctx->et_blink, CLOCK_SECOND / ctx->c);
} else {
etimer_stop(&ctx->et_blink);
}
}
}
}
/*---------------------------------------------------------------------------*/
PROCESS_THREAD(blink_process_1, ev, data)
{
static struct blink_process_ctx ctx;
PROCESS_BEGIN();
ctx.button = &button_1;
ctx.c = 0;
ctx.led = LEDS_1;
ctx.button->configure(SENSORS_ACTIVE, 1);
while (1) {
PROCESS_WAIT_EVENT();
handle_event(ev, data, &ctx);
}
PROCESS_END();
}
/*---------------------------------------------------------------------------*/
PROCESS_THREAD(blink_process_2, ev, data)
{
static struct blink_process_ctx ctx;
PROCESS_BEGIN();
ctx.button = &button_2;
ctx.c = 0;
ctx.led = LEDS_2;
ctx.button->configure(SENSORS_ACTIVE, 1);
while (1) {
PROCESS_WAIT_EVENT();
handle_event(ev, data, &ctx);
}
PROCESS_END();
}
/*---------------------------------------------------------------------------*/
PROCESS_THREAD(blink_process_3, ev, data)
{
static struct blink_process_ctx ctx;
PROCESS_BEGIN();
ctx.button = &button_3;
ctx.c = 0;
ctx.led = LEDS_3;
ctx.button->configure(SENSORS_ACTIVE, 1);
while (1) {
PROCESS_WAIT_EVENT();
handle_event(ev, data, &ctx);
}
PROCESS_END();
}
/*---------------------------------------------------------------------------*/
PROCESS_THREAD(blink_process_4, ev, data)
{
static struct blink_process_ctx ctx;
PROCESS_BEGIN();
ctx.button = &button_4;
ctx.c = 0;
ctx.led = LEDS_4;
ctx.button->configure(SENSORS_ACTIVE, 1);
while (1) {
PROCESS_WAIT_EVENT();
handle_event(ev, data, &ctx);
}
PROCESS_END();
}
/*---------------------------------------------------------------------------*/
PROCESS_THREAD(temp, ev, data)
{
static struct etimer tick;
PROCESS_BEGIN();
etimer_set(&tick, CLOCK_SECOND);
while (1) {
PROCESS_WAIT_EVENT();
if (ev == PROCESS_EVENT_TIMER && etimer_expired(&tick)) {
int32_t temp = temperature_sensor.value(0);
printf("temp: %"PRId32".%02"PRId32"\n", temp >> 2, (temp & 0x03)*25);
etimer_reset(&tick);
}
}
PROCESS_END();
}
/**
* @}
* @}
* @}
*/