AS1130 First attempt - working

Using Arduino LEDs and Multiplexing
147

To be honest mate...if you insist on using your own compiler, then you are going to run into problems as I said earlier.

I don't know how long the Mods or Admin will allow the discussion of porting code to another system.... :astonished:

Having said that...I would look up how YOUR compiler works with the I2C bus and concentrate on that. The Wire library is a wrapper for I2C and as such will just confuse you if you don't know the I2C protocol.

Here is some of my code for the CCS C compiler...I hope I don't get banned or repremanded for posting it here.

It may help because it looks like it is closer to your compiler....

/*****************************************************************************/
/*                      COMMUNICATIONS FUNCTIONS                             */
/*****************************************************************************/

/***** Function to write configuration settings to I2C bus *******************/
void AS1130_config(char AS_addr, char ram_reg, char command, char data)
{
	i2c_start();
	i2c_write(AS_addr);
	i2c_write(REGISTERSELECTION);
  	i2c_write(ram_reg);
	i2c_stop();
	
	i2c_start();
	i2c_write(AS_addr);
  	i2c_write(command);
	i2c_write(data);
	i2c_stop();
}
/*****************************************************************************/
/*                 EXT EEPROM COMMUNICATIONS FUNCTIONS                       */
/*****************************************************************************/

/***** Function to write data to external EEPROM *****************************/
//Standard I2C Protocol (see datasheet)
void write_ext_EEPROM(long int address, BYTE data)
{
   short int status;
   i2c_start();
   i2c_write(EEPROM_WRITE_ADDR);
   i2c_write(address>>8);
   i2c_write(address);
   i2c_write(data);
   i2c_stop();
   i2c_start();
   status=i2c_write(EEPROM_WRITE_ADDR);
   while(status==1)
   {
      i2c_start();
      status=i2c_write(EEPROM_WRITE_ADDR);
	//	delay_cycles(200);
   }
   i2c_stop();
}
/***** Function to read data from external EEPROM ****************************/
//Standard I2C Protocol (see datasheet)
BYTE read_ext_EEPROM(long int address)
 {
   BYTE data;
   i2c_start();
   i2c_write(EEPROM_WRITE_ADDR);
   i2c_write(address>>8);
   i2c_write(address);
   i2c_start();
   i2c_write(EEPROM_READ_ADDR);
   data=i2c_read(0);
   i2c_stop();
   return(data);
 }

Seriously, you need to understand the I2C protocol fully before Wire or bit banged (or anything in between) I2C will make any sense.

Here is a link to the EEprom's datasheet: http://ww1.microchip.com/downloads/en/DeviceDoc/21754M.pdf
Sections 4, 5 and 6 are pretty revealing as is the I2C description in the AS1130 datasheet.