I typed my a code to use USART 9Bits addressable communication to toggle 2 LEDs between 2 Mega16. Here is my code:
Transmitter:
/*Defining Statments*/
#define F_CPU 8000000UL
#define generalCallAddress 0x01
#define ACK 0x02
//#define NACK 0x03
#define myAddress 0x04
#define slaveAddress 0x05
#define delay 2000
/*Include Statements*/
#include "USARTModule.h"
#include #include
/*Global Variables Statements*/
char dataRecieved;
char dataTransmitted = 0x07;
char addressTransmitted = slaveAddress;
char dataExpected = 0x05;
/*Global Function Declare*/
/*Main*/
int main(void)
{
sei();
USARTinitil(8000000UL, 19200, 'n', 'a', 'e', 2, 9);
while(1)
{ if(dataExpected == addressTransmitted)
{
USARTTransmitAddress(addressTransmitted);
} else if(dataExpected == dataTransmitted)
{
USARTTransmitData(dataTransmitted);
} else if(dataExpected == NACK)
{
USARTTransmitAddress(addressTransmitted);
} else if(dataExpected == ACK)
{
USARTTransmitData(dataTransmitted);
}
}
}
ISR(USART_RXC_vect)
{
dataRecieved = USARTReceive();
switch(dataRecieved)
{
case ACK:
if(dataTransmitted == 0x06)
{
dataTransmitted = 0x07;
dataExpected = dataTransmitted;
_delay_ms(delay);
}else
{
dataTransmitted = 0x06;
dataExpected = dataTransmitted;
_delay_ms(delay);
}
case NACK:
dataExpected = NACK;
_delay_ms(delay);
case myAddress:
dataExpected = ACK;
_delay_ms(delay);
}
}Receiver:
/*Defining Statments*/
#define F_CPU 8000000UL
#define generalCallAddress 0x01
#define ACK 0x02
#define NACK 0x03
#define myAddress 0x05
#define masterAddress 0x04
#define turnON 0x06
#define turnOFF 0x07
#define LED1 PB0
#define LED2 PB1
#define LED_DDR DDRB
#define LED_PORT PORTB
#define delay 2000
/*Include Statements*/
#include "USARTModule.h"
#include #include
/*Global Variables Statements*/
char dataRecieved;
char dataExpected;
/*Global Function Declare*/
/*Main*/
int main(void)
{
sei();
setBit(LED_DDR, LED1);
setBit(LED_DDR, LED2);
USARTinitil(8000000UL, 19200, 'n', 'a', 'e', 2, 9);
MPCMModeSet();
while(1)
{
if(dataExpected == ACK)
{
USARTTransmitData(ACK);
} else
{
USARTTransmitData(NACK);
}
}
}
ISR(USART_RXC_vect)
{
dataRecieved = USARTReceive();
switch(dataRecieved)
{
case myAddress:
MPCMModeClear();
dataExpected = ACK;
_delay_ms(delay);
case turnON:
MPCMModeClear();
setBit(LED_PORT, LED1);
setBit(LED_PORT, LED2);
_delay_ms(delay);
case turnOFF:
MPCMModeClear();
clearBit(LED_PORT, LED1);
clearBit(LED_PORT, LED2);
_delay_ms(delay);
case NACK:
MPCMModeSet();
dataExpected = NACK;
_delay_ms(delay);
}
}Why does I only get 4 loops for toggling my LEDS and then it stops?!
Why is my logic deniable?!
