Thread: Working with loops

Please I want to modify this code to turn on a particular group of LEDs at a particular time. I have give some suggestions here. Please I will appreciate if some one can help me

Code:

#include "usartSPI.h"#include "tlc5971_poecie.h"
#include <avr/io.h>








// The sendBits() is used to send bits to address of the particular struct


void sendBits(struct TLC5971 *ptlc)			/* ptlc points to the struct TLC5971 */
{
	uint8_t n, *p = (uint8_t*)ptlc;			/* copy the structure pointed to by ptlc to the structure pointed to by p*/	
	
	for (n = 28; n-- > 0; )					/* Looping 28 times to send the 28 bytes for one LED driver  */
	{
		usartSPI_transfer(p[n]);			/* Using SPI to send each of the 28 bytes  */	
	}
	
}  


 


	
int main(void)
{
	
	static struct TLC5971 tlcarray[22];		/* Declare an array of 22 structure TLC5971 */
	struct TLC5971 *ptlc;					/* ptlc is a pointer to a structure */
	ptlc = &tlcarray[0];					/* ptlc is assigned the address of tlcarray[0]  */
	ptlc->BCR = 3;							
	ptlc->BCG = 3;
	ptlc->BCB = 3;
	ptlc->TMGRST = 1;
	ptlc->EXTGCK = 1;
	ptlc->cmd = 0x25;
	
	
	
	ptlc->GS[0][BLUE] = 0x1000;			// OUTB0
	ptlc->GS[0][GREEN] = 0x1000;		// OUTG0
	ptlc->GS[0][RED] = 0x1000;			// OUTR0
	
	ptlc->GS[1][BLUE] = 0x1000;			// OUTB1
	ptlc->GS[1][GREEN] = 0x1000;		// OUTG1
	ptlc->GS[1][RED] = 0x1000;			// OUTR1
	
	ptlc->GS[2][BLUE] = 0x1000;			// OUTB2
	ptlc->GS[2][GREEN] = 0x1000;		// OUTG2
	ptlc->GS[2][RED] = 0x1000;			// OUTR2
	
	ptlc->GS[3][BLUE] = 0x1000;			// OUTB3
	ptlc->GS[3][GREEN] = 0x1000;		// OUTG3
	ptlc->GS[3][RED] = 0x1000;			// OUTR3
	
	
	usartSPI_init();
	
	while (1)
	{
	/*	
		for (uint8_t testCase = 0; testCase < 3 ; testCase++)
		{
			switch(testCase)
			{
				case 0: tlcarray[0];
						tlcarray[1];
						tlcarray[2];
						tlcarray[3];
						tlcarray[4];
						tlcarray[5];
						tlcarray[6];
						tlcarray[7];
						break;
			
				case 1: tlcarray[8];
						tlcarray[9];
						tlcarray[10];
						tlcarray[11];
						tlcarray[12];
						tlcarray[13];
						tlcarray[14];
						tlcarray[15];
						break;
						
				case 2: tlcarray[16];
						tlcarray[17];
						tlcarray[18];
						tlcarray[19];
						tlcarray[20];
						tlcarray[21];
						break;			
				default:
						break;
			}
		
			while (1)
			{
				sendBits(&tlcarray[testCase]);
				break;
			}
		
			_delay_ms(500);
		}
	*/
		for (uint8_t num = 0; num <22 ; num++)	// Number of LED drivers
		{
			sendBits(&tlcarray[num]);			// For First TLC5971
			
		}
		
		
		// Stop SCKI at high or Low for 8 times the period between 224*N
		PORTD &= ~(1 << PD4);
		_delay_us(5);		// Atleast: 8*Period T + 1.34us
		
		// Send one SCKI clock with SDTI Low after 1.34us
		PORTD |= (1 << PD4);
		PORTD &= ~(1 << PD3);
		
		// OUTXn are Turned ON
		tlc5971.BLANK = 0;
	}
}