hal.c

dsp5509a USB 驱动 pc端程序 下面还有 dsp端程序

#include "C5509REG.h"
#include "hal.h"
/*
 * 1. Init GPIO for Test PTT 
 */
void GpioInit()
{	
	*IODIR |= D7+D4;        /*IO7 ---- DATA  In/Output       */
	                        /*IO4 ---- RST   Output          */
	*IODIR |= D6;           /*IO6 ---- CARD SELECT Output    */
	*IODATA |= D7+D4;       /*DATA=1,RST=1                   */
	*IODATA &= ~D6;         /*CARD SELECT A Card             */
	                                       
}
/*
 * 2. Delay OneETU (372clk=124us) 
 */
void DelayOneETU()
{
	asm(" RPT #(6000-1)");
	asm(" NOP");		
}
/*
 * 3. Delay HalfETU (372/2 clk=186clk=62us) 
 */
void DelayHalfETU()
{
	asm(" RPT #(3000-1)");
	asm(" NOP");		
}
/*
 * 4. Delay 10us 
 */
void Delay10us()
{
	asm(" RPT #(500-1)");
	asm(" NOP");		
}
/*
 * 4. Delay QtrETU(quarter ETU) (31us) 
 */
void DelayQtrETU()
{
	asm(" RPT #(1500-1)");
	asm(" NOP");		
}
/*
 * 5. Delay 400CLK :400*1000/3000000=133.3us
 */
void Delay400CLK()
{
	asm(" RPT #(6400-1)");
	asm(" NOP");		
}
/*
 * 6. Delay 42KCLK :42000*1000/3000000=14ms
 */
void Delay42KCLK()
{
	int i;
	
	for(i=0;i<112;i++)
		DelayOneETU();		
}
/*
 * 5. Test Delay OneETU's precision (372clk) 
 */