osd-contiki/examples/osd/arduino-i2c-scanner/sketch.pde
2017-02-23 08:49:02 +01:00

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/*
* Sample arduino sketch using contiki features.
* We turn the LED off
* We allow read the moisture sensor
* Unfortunately sleeping for long times in loop() isn't currently
* possible, something turns off the CPU (including PWM outputs) if a
* Proto-Thread is taking too long. We need to find out how to sleep in
* a Contiki-compatible way.
* Note that for a normal arduino sketch you won't have to include any
* of the contiki-specific files here, the sketch should just work.
*/
#include <Wire.h>
extern "C" {
#include "arduino-process.h"
#include "rest-engine.h"
#include "net/netstack.h"
extern resource_t res_led, res_battery, res_cputemp;
uint8_t led_pin=4;
uint8_t led_status;
}
void setup (void)
{
// switch off the led
pinMode(led_pin, OUTPUT);
digitalWrite(led_pin, HIGH);
led_status=0;
// i2c
Wire.begin();
// init coap resourcen
rest_init_engine ();
rest_activate_resource (&res_led, "s/led");
rest_activate_resource (&res_battery, "s/battery");
rest_activate_resource (&res_cputemp, "s/cputemp");
// NETSTACK_MAC.off(1);
mcu_sleep_set(128);
}
void loop (void)
{
byte error, address;
int nDevices;
printf("Scanning...\n");
nDevices = 0;
for(address = 1; address < 127; address++ )
{
// The i2c_scanner uses the return value of
// the Write.endTransmisstion to see if
// a device did acknowledge to the address.
Wire.beginTransmission(address);
error = Wire.endTransmission();
if (error == 0)
{
printf("I2C device found at address %2X",address);
nDevices++;
}
else if (error==4)
{
printf("Unknow error at address %2X",address);
}
}
printf("\n");
if (nDevices == 0)
printf("No I2C devices found\n");
else
printf("done\n");
}