Working version. NOW WITH UART DEBUG!

master
Davide Bongiovanni 8 years ago
parent 50d8bbafa3
commit 92cb9ad8ba

@ -1,9 +1,34 @@
#define F_CPU 8000000UL
#include "../avr-i2c-slave/I2CSlave.h" #include "../avr-i2c-slave/I2CSlave.h"
#include <util/delay.h> #include <util/delay.h>
#include <avr/io.h> #include <avr/io.h>
#include <avr/interrupt.h> #include <avr/interrupt.h>
#define I2C_ADDR 0x30 #define BAUDRATE 9600
#define BAUD_PRESCALLER (((F_CPU / (BAUDRATE * 16UL))) - 1)
#define I2C_ADDR 0x20
void USART_init(void){
UBRR0H = (uint8_t)(BAUD_PRESCALLER>>8);
UBRR0L = (uint8_t)(BAUD_PRESCALLER);
UCSR0B = (1<<RXEN0)|(1<<TXEN0);
UCSR0C = (3<<UCSZ00);
}
void USART_send( unsigned char data){
while(!(UCSR0A & (1<<UDRE0)));
UDR0 = data;
}
void USART_putstring(char* StringPtr){
while(*StringPtr != 0x00){
USART_send(*StringPtr);
StringPtr++;
}
}
volatile uint8_t challenge = 0; // Use 0 as 'challenge not sent' condition volatile uint8_t challenge = 0; // Use 0 as 'challenge not sent' condition
uint16_t time_open = 0; uint16_t time_open = 0;
@ -13,7 +38,13 @@ uint8_t check_challenge(uint8_t arg) {
} }
void I2C_received(uint8_t received_data) { void I2C_received(uint8_t received_data) {
if (received_data == check_challenge(challenge)) { // Check validity of response uint8_t solution;
char message[100] = {0};
solution = check_challenge(challenge);
sprintf(message, "Response: %d. Expected: %d\n", received_data, solution);
USART_putstring(message);
if (received_data == solution) { // Check validity of response
// Open lock // Open lock
time_open = 5000; time_open = 5000;
} }
@ -22,6 +53,9 @@ void I2C_received(uint8_t received_data) {
void I2C_requested() { void I2C_requested() {
challenge = (uint8_t)(TCNT1 & 0xff); challenge = (uint8_t)(TCNT1 & 0xff);
I2C_transmitByte(challenge); I2C_transmitByte(challenge);
char message[100] = {0};
sprintf(message, "Request received. Sending %d\n", challenge);
USART_putstring(message);
} }
void setup() { void setup() {
@ -36,8 +70,11 @@ void setup() {
} }
int main() { int main() {
int i = 0;
setup(); setup();
USART_init();
while (1) { while (1) {
i++;
if (time_open > 0) { if (time_open > 0) {
PORTC |= 2 << 1; PORTC |= 2 << 1;
time_open -= 1; time_open -= 1;
@ -45,5 +82,10 @@ int main() {
PORTC = 0; PORTC = 0;
} }
_delay_ms(1); _delay_ms(1);
if (i > 1000) {
char message[] = "Alive\n";
USART_putstring(message);
i = 0;
}
} }
} }

@ -5,7 +5,7 @@
# (GNU make, BSD make, SysV make) # (GNU make, BSD make, SysV make)
MCU = atmega88 MCU = atmega328p
FORMAT = ihex FORMAT = ihex
TARGET = main TARGET = main
SRC = $(TARGET).c \ SRC = $(TARGET).c \

Loading…
Cancel
Save