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Mình đang thực hiện giao tiếp I2C giữa 2 con dsPIC 4011 nhưng con master chỉ chạy đến dòng while(!IFS0bits.MI2CIF); thì bị đứng ở đó không chạy tiếp. Mình đã nhìn theo waveform để viết nhưng vẫn không chạy, mong mọi người xem giúp mình với, dưới đây là code master và slave.
Code Master
Code Slave
Và 2 file i2c.c , i2c.h trong file đính kèm
Code Master
Code:
/*;------------------------------------------------------------------*/
#include "main.h"
#include <stdlib.h>
#include <stdio.h>
#include <math.h>
#include <string.h>
#define MAXSPEED 2000
#define HALFMAXSPEED 1000
#define driver_x 0x10
#define driver_y 0x20
//Khai bao bien
/* Baud rate is set for 100 Khz */
config2 = 0x20;
/* Configure I2C for 7 bit address mode */
config1 = (I2C_ON & I2C_IDLE_CON & I2C_CLK_HLD &
I2C_IPMI_DIS & I2C_7BIT_ADD &
I2C_SLW_DIS & I2C_SM_DIS &
I2C_GCALL_DIS & I2C_STR_DIS &
I2C_ACK & I2C_ACK_DIS & I2C_RCV_DIS &
I2C_STOP_DIS & I2C_RESTART_DIS &
I2C_START_DIS); // config = 0x8200; */ Enable I2C and Disable Slew Rate Control */
//Khai bao ham
//Chuong trinh chinh
void main(void)
{
_TRISE5 = 0;
_LATE5 = 0;
_TRISE4 = 0;
_LATE4 = 0;
_TRISE3 = 0;
_LATE3 = 0;
_TRISE2 = 0;
_LATE2 = 0;
while(1)
{
OpenI2CMaster(config1,config2);
IdleI2C();
StartI2C();
/* Wait till Start sequence is completed */
while(I2CCONbits.SEN);
/* Clear interrupt flag */
IFS0bits.MI2CIF = 0;
/* Write Slave address and set master for transmission */
MasterWriteI2C(0x40);
/* Wait till address is transmitted */
while(I2CSTATbits.TBF); // 8 clock cycles
_LATE5 = 1;
while(I2CSTATbits.ACKSTAT);
_LATE4 = 1;
while(!IFS0bits.MI2CIF); // Wait for 9th clock cycle
IFS0bits.MI2CIF = 0; // Clear interrupt flag
_LATE3 = 1;
/* Transmit string of data */
MasterWriteI2C(0xAA); // write a byte
while(I2CSTATbits.TBF); //Wait till data is transmitted.
_LATE2 = 1;
IdleI2C();
StopI2C();
/* Wait till stop sequence is completed */
while(I2CCONbits.PEN);
CloseI2C();
}
}
//------------------------------------------------------------------------------
// Cac chuong trinh con va chuong trinh phuc vu ngat neu co
//------------------------------------------------------------------------------
Code Slave
Code:
/*;------------------------------------------------------------------*/
#include "main.h"
#include <stdlib.h>
#include <stdio.h>
#include <math.h>
#include <string.h>
#define MAXSPEED 2000
#define HALFMAXSPEED 1000
#define driver_x 0x10
#define driver_y 0x20
//Khai bao bien
/* Baud rate is set for 100 Khz */
config2 = 0x90;
/* Configure I2C for 7 bit address mode */
config1 = (I2C_ON & I2C_IDLE_CON & I2C_CLK_REL &
I2C_IPMI_DIS & I2C_7BIT_ADD &
I2C_SLW_DIS & I2C_SM_DIS &
I2C_GCALL_DIS & I2C_STR_DIS &
I2C_ACK & I2C_ACK_DIS & I2C_RCV_DIS &
I2C_STOP_DIS & I2C_RESTART_DIS &
I2C_START_DIS); // config1 = 0x9200; */ Enable I2C , Disable Slew Rate Control and Release SCL Clock */
//Khai bao ham
//Chuong trinh chinh
void main(void)
{
_TRISE5 = 0;
_LATE5 = 0;
_TRISE4 = 0;
_LATE4 = 0;
_TRISE3 = 0;
_LATE3 = 0;
_TRISE2 = 0;
_LATE2 = 0;
while(1)
{
OpenI2CSlave(config1,config2);
while(!I2CSTATbits.S||I2CSTATbits.P); /* Wait till I2C bus active */
_LATE5 = 1;
while(I2CSTATbits.D_A||I2CSTATbits.R_W); /* Wait till slave ready to receive data */
_LATE4 = 1;
//while(!IFS0bits.SI2CIF); /* Wait till interrupt flag set */
IFS0bits.SI2CIF = 0; /* Clear interrupt flag */
I2CSTATbits.I2COV = 0; /* Clear Receive Overflow Flag bit */
while(!DataRdyI2C); /* Wait till I2CRCV is full */
_LATE3 = 1;
if(SlaveReadI2C == 0xAA) _LATE2 = 1; /* Read data */
IFS0bits.SI2CIF = 0; /* Clear interrupt flag */
}
}
//------------------------------------------------------------------------------
// Cac chuong trinh con va chuong trinh phuc vu ngat neu co
//------------------------------------------------------------------------------
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