hello
I am working on a project where I attached LM75 temperature sensor through to
my
telosb module through I2C interface and I write the following program to read
it
:
BlinkToRadioC.nc file:
#include <Timer.h>
#include <I2C.h>
module BlinkToRadioC {
uses interface Boot;
uses interface Leds;
uses interface Timer<TMilli> as Timer0;
uses interface I2CPacket<TI2CBasicAddr>;
uses interface Resource; //I2C bus resource
}
implementation {
uint16_t counter;
uint8_t a[2];
//a[0] = 0x00;
//a[1] = 0x00;
void setLeds(uint8_t val) {
if (val & 0x04)
call Leds.led0On();
else
call Leds.led0Off();
if (val & 0x02)
call Leds.led1On();
else
call Leds.led1Off();
if (val & 0x01)
call Leds.led2On();
else
call Leds.led2Off();
}
event void Boot.booted() {
call Timer0.startPeriodic(1000); }
event void Timer0.fired() {
counter++;
if(call Resource.request() == SUCCESS){
}
}
// the begin of writing and reading from I2c
event void Resource.granted() {
if (call I2CPacket.read(I2C_START | I2C_STOP, 0x48, 2, a) == SUCCESS)call
Leds.led1Toggle(); //setLeds(a[0]);//call Leds.led1Toggle();
//call Resource.release();
}
async event void I2CPacket.readDone(error_t error, uint16_t addr, uint8_t
length, uint8_t* data) {
// call Leds.led1On();
if((call Resource.release()) == SUCCESS) call Leds.led0Toggle() ;
call Leds.led2Toggle();
}
async event void I2CPacket.writeDone(error_t error, uint16_t addr, uint8_t
length, uint8_t* data) {
//call Leds.led2On();
}
}
BlinkToRadioAppC.nc file:
#include <Timer.h>
#include "BlinkToRadio.h"
configuration BlinkToRadioAppC {
}
implementation {
components MainC;
components LedsC;
components BlinkToRadioC as App;
components new TimerMilliC() as Timer0;
components new Msp430I2CC();
App.Boot -> MainC;
App.Leds -> LedsC;
App.Timer0 -> Timer0;
App.Resource -> Msp430I2CC;
App.I2CPacket -> Msp430I2CC;
}
I notice that the read operation is successful for the first time only but then
the read operation stops. I observed it as the led0,2 is on for the first
reading but then never changes also led one get on for 1 sec then get off and
stays off
also I tried to read the value of the temperature from the a register and
after
converting it ,it gives me correct value (29.5) deg but when I changed the
temperature these value doesnot changed untill I restarted the mote
What I shall do ?
Mohammed
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