iic_test.c

S3C2410底层驱动KEIL版--IIC

/*********************************************************************************************
* File name:	iic.c
* Author:		Embest
* Descript:		iic source code. 
* History:
* Ahthor		Xu  Fub 16th 2006	
*********************************************************************************************/

/*------------------------------------------------------------------------------------------*/
/*	 								include files						 				    */
/*------------------------------------------------------------------------------------------*/
#include "2410lib.h"

/*------------------------------------------------------------------------------------------*/
/*	 								global variables					 				    */
/*------------------------------------------------------------------------------------------*/
int f_nGetACK;

/*********************************************************************************************
* name:		iic_write_24c08
* func:		write data to 24C08
* para:		unSlaveAddr --- input, chip slave address
*			unAddr		--- input, data address
*			ucData    	--- input, data value
* ret:		none
* modify:
* comment:		
*********************************************************************************************/
void slave_transmit_16byte(void)
{
	int ucData = 0;

	f_nGetACK = 0;

	// Initialize iic
	rIICADD = 0x10;					// S3C2410X slave address 
    rIICCON = 0xaf;					// Enable ACK, interrupt, SET IICCLK=MCLK/16
    rIICSTAT = 0x70;				// Slave Tx,Start,Enable TX/RX 
        
    while(f_nGetACK == 0);			// Wait ACK
    f_nGetACK = 0;
    
    // Send 16 byte data 
	while(1)
	{
		rIICDS = ucData++;
    	rIICCON = 0xaf;				// Resumes IIC operation.

		if((rIICSTAT|0x20) == 0)    // Detect stop condition
			return ;											    

    	while(f_nGetACK == 0);		// Wait ACK
    	f_nGetACK = 0;
	}
}

/*********************************************************************************************
* name:		iic_int_24c04()
* func:		IIC interrupt handler
* para:		none
* ret:		none
* modify:
* comment:		
*********************************************************************************************/
void __irq iic_int_24c08(void)
{
    ClearPending(BIT_IIC);
	f_nGetACK = 1;
}

/*********************************************************************************************
* name:		iic_test
* func:		test iic
* para:		none
* ret:		none
* modify:
* comment:		
*********************************************************************************************/
void iic_test(void)
{
	f_nGetACK = 0;

    // Enable interrupt
	rINTMOD  = 0x0;
    ClearPending(BIT_IIC);
	rINTMSK &= ~BIT_IIC;
    pISR_IIC = (unsigned)iic_int_24c08;

    // Write 16 byte into 24C08
	slave_transmit_16byte();
    
	rINTMSK |= BIT_IIC;
	uart_printf("\n end.\n");
}