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#include "link.h"
#include "physical.h"
#include "transport.h"
// include the library code:
#include <LiquidCrystal.h>
// initialize the library with the numbers of the interface pins
LiquidCrystal lcd(8, 9, 4, 5, 6, 11);
int freeRam () {
extern int __heap_start, *__brkval;
int v;
return (int) &v - (__brkval == 0 ? (int) &__heap_start : (int) __brkval);
}
#define LED_PIN 13
uint8_t msg_buffer[] = {97,98,99};
message msg = {msg_buffer, 3};
void setup() {
pinMode(LED_PIN, OUTPUT);
lcd.begin(16, 2);
init_physical_layer(115200);
init_transport_layer(200);
}
void step_circle() {
static volatile uint8_t position = 0;
static const char chars[] = {'|', '/', '-', '\\'};
position = position + 1;
if (position >= 4) position = 0;
lcd.setCursor(15, 0);
lcd.print(chars[position]);
}
void loop() {
//lcd.print(freeRam());
int x = analogRead (0);
//lcd.setCursor(10,1);
if (x < 100) {
//lcd.print ("Right ");
}
else if (x < 200) {
//lcd.print ("Up ");
}
else if (x < 400){
//lcd.print ("Down ");
}
else if (x < 600){
// lcd.print ("Raw ");
to_physical_layer(97);
}
else if (x < 800){
lcd.setCursor(0,0);
lcd.print ("SENDING...");
to_transport_layer(&msg);
lcd.print ("DONE");
}
else {
}
delay(100);
//step_circle();
}
/*void from_physical_layer(uint8_t byte) {
if (byte == 'A') digitalWrite(LED_PIN, HIGH);
else digitalWrite(LED_PIN, LOW);
}*/
/*void from_link_layer(packet* s) {
if (s->data[0] == 'A') digitalWrite(LED_PIN, HIGH);
else digitalWrite(LED_PIN, LOW);
};*/
static volatile uint32_t errs = 0;
void from_transport_layer(transport_code code, message* s) {
lcd.clear();
lcd.setCursor(0,0);
if (code == RECEIVED) {
lcd.print("RECEIVED");
lcd.setCursor(0,1);
for (int i = 0; i < s->length; ++i) lcd.write(s->data[i]);
}
if (code == SEND_SUCCESS) {
lcd.print("SENT");
for (int i = 0; i < s->length; ++i) lcd.write(s->data[i]);
}
if (code >= SEND_ERROR) {
lcd.print("ERROR");
lcd.setCursor(0,1);
switch(code) {
case NO_ACK:
lcd.print("NO ACK");
break;
case BAD_ACK:
lcd.print("BAD ACK");
break;
case BUSY:
lcd.print("BUSY");
break;
}
}
} //implemented in transport
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