slaveputsi2c.c

来自「Microchip的官方PIC24H系列16位单片机的外设源程序库。」· C语言 代码 · 共 24 行

#include <i2c.h>
#include <p30fxxxx.h>

/**************************************************************************
*    Function Name:  SlaveputsI2C
*    Description:    This routine is used to write out a string to the 
*                    I2C bus.If write collision occurs,-3 is sent.If 
*                    string is written and null char reached, 0 is returned. 				 
*    Parameters:     unsigned char * : wrptr
*    Return Value:   unsigned int
****************************************************************************/

unsigned int SlaveputsI2C(unsigned char * wrptr)
{
    I2CCONbits.STREN = 1;            /* SCL clock stretch enable bit */
    while(*wrptr)	             /* transmit data until null char */
    {
        SlaveputcI2C(*wrptr++);	     /* Send a byte */
	while(I2CSTATbits.TBF);	     /* wait till the transmit buffer is clear */ 
        while(!IFS0bits.SI2CIF);     /* Wait till the ACK from master is received */
    }
    return 0;                        /* null char was reached */
}