master1.c

ADuC7020开发板SPI程序, 授权开发, 内部资料,共享, 后续程序值得学习

/*********************************************************************

 Author        : ADI - Apps            www.analog.com/MicroConverter

 Date          : Dec. 2005

 File          : master1.c

 Hardware      : Applicable to ADuC702x rev H or I silicon
                 Currently targetting ADuC7026.

 Description   : SPI master	to demonstrate with slave.c or slave1.c
		
*********************************************************************/


#include<ADuC7026.h>

void My_IRQ_Function(void);				//	IRQ Funtion Prototype 
int i = 0;

int main(void) {
	IRQ = My_IRQ_Function;
	GP4DAT = 0x04000000;			// P4.2 configured as an output. LED is turned on	
	IRQEN = SPI_MASTER_BIT;
	GP1CON = 0x22220000;				// configure SPI on SPM
	SPIDIV = 0xCC;						// set SPI clock 40960000/(2x(1+SPIDIV))
										// 0xCC = 100kHz
	SPICON = 0x104B;					// enable SPI master in continuous transfer mode 
										// slave select will stay low during the all transmission
while (1){
	}				
}


/********************************************************************/
/*                                                                  */
/*		Interrupt Service Rountine									*/
/*                                                                  */
/********************************************************************/

void My_IRQ_Function() {
	GP4DAT ^= 0x00040000;		// Complement P4.2
	if ((IRQSTA & SPI_MASTER_BIT) != 0) {
		SPITX = i;
		i++;
		if (i==30) IRQCLR = SPI_MASTER_BIT;
	}
	return ;
}