Ok, thank you! I have read a thread talking about the same problem, and it's
solved!!
The thread is:
http://mail.millennium.berkeley.edu/pipermail/tinyos-help/2007-January/021749.html
2007/2/28, Philip Levis <[EMAIL PROTECTED]>:
On Feb 26, 2007, at 6:39 AM, Jordi Casals wrote:
> Hi,
>
> I use T2 and a micaz platform and now I am trying to connect an I2C
> display to my micaz. I don't have the display yet, but I want to
> have my application ready as soon as possible. I would like to know
> if the writeDone event is signaled even there is no I2C device
> connected to my micaz. I don't know if I there is any problem...
> but Leds.set(0x02) is never called.
>
> Thank you
>
> ______________________________________________________________
> module RandomToI2CC{
> uses{
> interface Boot;
> interface Leds;
> interface Random;
> interface Resource;
> interface I2CPacket<TI2CBasicAddr> as I2C;
> interface Timer<TMilli> as Timer;
> }
> }
>
> implementation{
> uint8_t counter = 0;
>
> event void Boot.booted(){
> call Leds.set(0);
> call Timer.startPeriodic(TIMER_PERIOD);
> }
> event void Timer.fired(){
> if(!(call Resource.isOwner())){
> if(call Resource.request() == SUCCESS){
> }
> }
> }
> event void Resource.granted(){
> if(call I2C.write(I2C_START | I2C_STOP, 12, sizeof(uint8_t),
> &counter) == SUCCESS){
> call Leds.set(0x01);
> }else{
> call Leds.set(0xFF);
> }
> }
> async event void I2C.readDone(error_t error, uint16_t addr,
> uint8_t length, uint8_t* data){
> }
> async event void I2C.writeDone(error_t error, uint16_t addr,
> uint8_t length, uint8_t* data){
> if(call Resource.release() == SUCCESS){
> call Leds.set(0x04);
> }
> call Leds.set(0x02);
> }
> }
> ______________________________________________________________
When it comes to I2C, things can be hard to debug. I suggest that you
take a look at how the I2C driver works (chips/atm128/i2c/
Atm128I2CMasterPacketP.nc). If you're not getting a writeDone(), then
chances are the I2C isn't issuing an interrupt in response to your
start condition.
Phil
--
Jordi Casals
E-mail: [EMAIL PROTECTED]
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