[Tinyos-help] Connecting Tmotes by I2C bus

[Matteo Andretto]

Quoting "R. Steve McKown" <smckown at titaniummirror.com>:
>
> If you want to post your code, I can take a look at it.


The code is yours, I have changed only the salve address and add the  
address check reading three bit at a time with leds.

#include <I2C.h>

module SlaveI2CC {
   uses {
     interface Boot;
     interface Resource;
     interface I2CSlave<TI2CBasicAddr>;
     interface Timer<TMilli>;
     interface Leds;
   }
}
implementation {

uint16_t SlaveInd;
   enum {
     OUR_ADDR = 0x18,
     SPACE_SZ = 16
   };
   uint8_t space[SPACE_SZ];
   int addr = 0;
   norace error_t lastErr = FAIL;

   inline void incAddr() { addr = (addr + 1) % SPACE_SZ; }

   void localError(int e)
   {
     call Leds.led0Off();
     call Leds.led1Off();
     call Leds.led2Off();
   }

   event void Boot.booted()
   {
     call Timer.startPeriodic(1024);
     if (call Resource.request() == SUCCESS)
       return;
     localError(1);
   }

   event void Timer.fired()
   {
/*
     if (!(I2CDCTL & I2CBB) && !(I2CDCTL & I2CBUSY)) {
       // show when we're not busy
       call Leds.led1Off();
       call Leds.led2Off();
     }
*/
	call Leds.led0Off();
	call Leds.led1Off();
	call Leds.led2Off();
	if ((I2COA & 1) == 1)	call Leds.led0On();
	if ((I2COA & 2) == 2)	call Leds.led1On();
	if ((I2COA & 4) == 4)	call Leds.led2On();
/*
	if ((I2COA & 8) == 8)	call Leds.led0On();
	if ((I2COA & 16) == 16)	call Leds.led1On();
	if ((I2COA & 32) == 32)	call Leds.led2On();
	if ((I2COA & 64) == 64)	call Leds.led2On();
*/
   }

   event void Resource.granted()
   {
     if (call I2CSlave.listen(OUR_ADDR) == SUCCESS) {
       // done in configure(). call Leds.led0On();
       return;
     }
     localError(2);
   }

   async event uint8_t I2CSlave.writeByte()
   {
     uint8_t byte = space[addr];
     call Leds.led2Off();
     call Leds.led1On();
     incAddr();
     return byte;
   }

   async event void I2CSlave.readByte(uint8_t data)
   {
     call Leds.led1Off();
     call Leds.led2On();
     space[addr] = data;
     incAddr();
   }
}

-----------------------------------------------
-----------------------------------------------

module SlaveI2CConfC {
   provides interface Msp430I2CConfigure;
}
implementation {
   async command msp430_i2c_config_t* Msp430I2CConfigure.getConfig() {
     static msp430_i2c_config_t testConfig = {
         rxdmaen : 0,
         txdmaen : 0,
         xa : 0,
         listen : 0,
         i2cword : 0,
         i2crm : 1,
         i2cssel : 2,
         i2cpsc : 0,
         i2csclh : 3,
         i2cscll : 3,
         i2coa : 0x18, /* for slave, apparently must have it here? */
     };
     return &testConfig;
   }
}