Lpc2000

I guess it means an 8 bits  signed type.

Boby


--- heedaf <ruffellfamily@...> wrote:

> In the following sample code does anyone know what
> tS8 (tS8 retCode 
> = 0;) do/mean?  It is contained in a .h file.
> 
> 
> tS8
> i2cWrite(tU8  addr,
>          tU8  extraCmd,
>          tU16 extra,
>          tU8* pData,
>          tU16 len)
> {
>   tS8 retCode = 0;
>   tU8 i       = 0;
> 
>   do
>   {
>     //generate Start condition
>     retCode = i2cStart();
>     if(retCode != I2C_CODE_OK)
>       break;
>     
>     //Transmit slave address
>     retCode = i2cPutCharAndWait(addr);
>     if(retCode != I2C_CODE_OK)
>       break;
> 
>     //Transmit MSB of extra word (if wanted)
>    	if (extraCmd == I2C_EXTRA_WORD)
>   	{
>       retCode = i2cPutCharAndWait((tU8)(extra >>
> 8));
>       if(retCode != I2C_CODE_OK)
>         break;
>     }
> 
>     //Transmit LSB of extra work (if wanted)
>    	if ((extraCmd == I2C_EXTRA_BYTE) || (extraCmd ==
> 
> I2C_EXTRA_WORD))
>    	{
>       retCode = i2cPutCharAndWait((tU8)(extra &
> 0xff));
>       if(retCode != I2C_CODE_OK)
>         break;
> 	  }
> 
>     //wait until address transmitted and transmit
> data
>     for(i = 0; i < len; i++)
>     {
>       retCode = i2cPutCharAndWait(*pData);
>       if(retCode != I2C_CODE_OK)
>         break;
>       pData++;
>     }
>   } while(0);
> 
>   return retCode;
> }
> 
> 
> 
> 


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