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LED-1 Display


4-digit 7-segment LED display example using BiPOM LED-1 board. Includes I2C interface to SAA1064 LED driver chip.

Toolkit:ARM Development System

Location:/bipom/devtools/GCC/LPC2000/examples/led1

Code Example


int main (void)
{
	UBYTE i;
 	/* Initialize the system */
	Initialize();
	/* Send messages to TERMINAL window */
	tiprintf("\n\rBIPOM MINI-MAX/ARM");
	tiprintf("\n\rLED1 TEST ");
	//

	for ( ;; )	
 	{
		/* SAA1064 address */	
		LED1_Command.Address = I2C_DEVICE_SAA1064 ;
		/* SAA1064 instruction */
		LED1_Command.Instruction = 0 ;
/* Test 1 */	
		tiprintf ( "\r\n\r\nAll segment outputs are switched on"); 
		/* Configure the control word */
		LED1_Command.Control = DYNAMIC+NOT_BLANK_13+NOT_BLANK_24+TEST+CUR_12MA;
		/* Set digit latches */
		LED1_Command.Digit1  =
		LED1_Command.Digit2  =
		LED1_Command.Digit3  =
		LED1_Command.Digit4  = 0xff ;
		SendBuffer();
/* Test 2 */	
		tiprintf ( "\r\n\r\nDigits 1 & 3 are blanked"); 
		/* Configure the control word */
		LED1_Command.Control = DYNAMIC+BLANK_13+NOT_BLANK_24+WORK+CUR_12MA;
		/* Set a contens of digit latches */
		LED1_Command.Digit1  =
		LED1_Command.Digit2  =
		LED1_Command.Digit3  =
		LED1_Command.Digit4  = 0xff ;
		SendBuffer();
/* Test 3 */	
		tiprintf ( "\r\n\r\nDigits 2 & 4 are blanked"); 
		/* Configure the control word */
		LED1_Command.Control = DYNAMIC+NOT_BLANK_13+BLANK_24+WORK+CUR_12MA;
		/* Set digit latches */
		LED1_Command.Digit1  =
		LED1_Command.Digit2  =
		LED1_Command.Digit3  =
		LED1_Command.Digit4  = 0xff ;
		SendBuffer();
/* Test 4 */	
		tiprintf ( "\r\n\r\nAll segment outputs of Digit1 are switched on"); 
	   	/* Configure the control word */
		LED1_Command.Control = DYNAMIC+NOT_BLANK_13+NOT_BLANK_24+WORK+CUR_12MA;
		/* Set digit latches */
		LED1_Command.Digit1  = 0xff ;
		LED1_Command.Digit2  =
		LED1_Command.Digit3  =
		LED1_Command.Digit4  = 0x00 ;
		SendBuffer();
/* Test 5 */	
		tiprintf ( "\r\n\r\nAll segment outputs of Digit2 are switched on"); 
		/* Configure the control word */
		LED1_Command.Control = DYNAMIC+NOT_BLANK_13+NOT_BLANK_24+WORK+CUR_12MA;
		/* Set digit latches */
		LED1_Command.Digit1  = 0x00 ;
		LED1_Command.Digit2  = 0xff ;
		LED1_Command.Digit3  =
		LED1_Command.Digit4  = 0x00 ;
		SendBuffer();
/* Test 6 */	
		tiprintf ( "\r\n\r\nAll segment outputs of Digit3 are switched on"); 
		/* Configure the control word */
		LED1_Command.Control = DYNAMIC+NOT_BLANK_13+NOT_BLANK_24+WORK+CUR_12MA;
		/* Set digit latches */
		LED1_Command.Digit1  = 
		LED1_Command.Digit2  = 0x00 ;
		LED1_Command.Digit3  = 0xff ;
		LED1_Command.Digit4  = 0x00 ;
		SendBuffer();
/* Test 7 */	
		tiprintf ( "\r\n\r\nAll segment outputs of Digit4 are switched on"); 
		/* Configure the control word */
		LED1_Command.Control = DYNAMIC+NOT_BLANK_13+NOT_BLANK_24+WORK+CUR_12MA;
		/* Set digit latches */
		LED1_Command.Digit1  = 
		LED1_Command.Digit2  = 
		LED1_Command.Digit3  = 0x00 ;
		LED1_Command.Digit4  = 0xff ;
		SendBuffer();
/* Test 8 */
	    tiprintf ( "\r\n\r\n***************");	
		tiprintf ( "\r\nSegment testing");
		tiprintf ( "\r\n***************");	 
		/* Configure the control word */
		LED1_Command.Control = DYNAMIC+NOT_BLANK_13+NOT_BLANK_24+WORK+CUR_12MA;
		/* Set digit latches */
		for ( i = 0 ; i < 8 ; i++ )
		{
	  		LED1_Command.Digit1  = 
	  		LED1_Command.Digit2  = 
	  		LED1_Command.Digit3  = 
	  		LED1_Command.Digit4  = LED1_ContensSegment[i];
	  		tiprintf ("\r\n\r\n*%c* Segment is switched on", LED1_NameSegment[i] );
			SendBuffer();
		}
	}	
}