Buen día. Hace dos meses que estoy tratando de hacer dos actos PIC como maestro y como esclavo en otro tiempo y el trabajo como un esclavo y el amo, pero no hasta el momento. Disistindo Por lo tanto, no sé qué más hacer. Alguien me podría ayudar. Aquí está el código del amo y el esclavo.
// MASTER
#include <16F877A.h>
#device adc=10
#FUSES NOWDT //No Watch Dog Timer
#FUSES HS //High speed Osc (> 4mhz)
#FUSES PUT //Power Up Timer
#FUSES PROTECT //Code protected from reads
#FUSES NODEBUG //No Debug mode for ICD
#FUSES BROWNOUT //Brownout reset
#FUSES NOLVP //No low voltage prgming, B3(PIC16) or B5(PIC18) used for I/O
#FUSES NOCPD //No EE protection
#FUSES NOWRT //Program memory not write protected
#use delay(clock=20M)
//NOTE: Must declare MASTER before SLAVE, i2c_isr_state() returns 0
// when MASTER is the most recent #use i2c
#use i2c(MASTER, sda=PIN_C1, scl=PIN_C0, stream=I2CM)
#use i2c(SLAVE, sda=PIN_C4, scl=PIN_C3, address=0xA0, force_hw, stream=I2CS)
#use rs232(baud=57600, parity=N, xmit=PIN_C6, rcv=PIN_C7, bits=8, stream=COM1)
#use fast_io(D)
int rcv_buf[0x10];
int wrt_buf[0x10];
int address;
#int_SSP // interrupt on i2c activity
void i2c_isr(void)
{
int state, incoming;
state = i2c_isr_state(I2CS);
if(state < 0x80)
{
incoming = i2c_read(I2CS);
if (state == 1)
{
address = incoming;
}
else if (state >= 2)
{
rcv_buf[address] = incoming;
}
}
else if(state == 0x80)
{
i2c_write(I2CS,wrt_buf[address]);
}
}
void main()
{
enable_interrupts(INT_SSP);
enable_interrupts(GLOBAL);
printf("\n\rbegin");
while (TRUE)
{
if (!input(PIN_B4))
{
i2c_start(I2CM);
i2c_write(I2CM,0xB0); //i2c address of a slave device
delay_ms(10);
i2c_write(I2CM,0x00); //1st byte to slave
delay_ms(10);
i2c_write(I2CM,0x22); //2nd byte to slave
delay_ms(10);
i2c_stop(I2CM);
}
}
}
//SLAVE
#include <16F877A.h>
#device adc=10
#FUSES NOWDT //No Watch Dog Timer
#FUSES HS //High speed Osc (> 4mhz)
#FUSES PUT //Power Up Timer
#FUSES PROTECT //Code protected from reads
#FUSES NODEBUG //No Debug mode for ICD
#FUSES BROWNOUT //Brownout reset
#FUSES NOLVP //No low voltage prgming, B3(PIC16) or B5(PIC18) used for I/O
#FUSES NOCPD //No EE protection
#FUSES NOWRT //Program memory not write protected
#use delay(clock=20M)
//NOTE: Must declare MASTER before SLAVE, i2c_isr_state() returns 0
// when MASTER is the most recent #use i2c
#use i2c(MASTER, sda=PIN_C1, scl=PIN_C0, stream=I2CM)
#use i2c(SLAVE, sda=PIN_C4, scl=PIN_C3, address=0xB0, force_hw, stream=I2CS)
#use rs232(baud=57600, parity=N, xmit=PIN_C6, rcv=PIN_C7, bits=8, stream=COM1)
#use fast_io(D)
int rcv_buf[0x10];
int wrt_buf[0x10];
int address;
#int_SSP // interrupt on i2c activity
void i2c_isr(void)
{
int state, incoming;
state = i2c_isr_state(I2CS);
if(state < 0x80)
{
incoming = i2c_read(I2CS);
if (state == 1)
{
address = incoming;
}
else if (state >= 2)
{
rcv_buf[address] = incoming;
}
}
else if(state == 0x80)
{
i2c_write(I2CS,wrt_buf[address]);
}
}
void main()
{
enable_interrupts(INT_SSP);
enable_interrupts(GLOBAL);
printf("\n\rbegin");
while (TRUE)
{
if (!input(PIN_B4))
{
i2c_start(I2CM);
i2c_write(I2CM,0xa0); //i2c address of a slave device
delay_ms(10);
i2c_write(I2CM,0x00); //1st byte to slave
delay_ms(10);
i2c_write(I2CM,0x22); //2nd byte to slave
delay_ms(10);
i2c_stop(I2CM);
}
}
}
