/* Escreve a temperatura como um numero decimal */
void escrevenum(int num)
{
char digs[16];
int nd=0;
num *=625;
if(num<0) { LCDputchar('-'); num=-num; }
do {
digs[nd++]= (num % 10) + '0';
num /= 10;
} while(num);
while(nd < 5) digs[nd++]='0';
while(nd > 4) LCDputchar(digs[--nd]);
LCDputchar(','); /* Parte fracionaria com resolucao de 1/16 grau */
LCDputchar(digs[--nd]);
LCDputchar(digs[--nd]);
UART0putchar('\n');
}
BYTE U0get (int mtempo)
{
BYTE d;
int idx;
static int brilho=0x38;
int k,seg;
int tempo, tini;
tini = Timer;
tempo = mtempo / 1000;
/* Wait while Rx buffer is empty */
seg = RTC_SEC;
k=10000;
while (!RxFifo0.count) {
idx = LEBOTAO;
if((mtempo > 0) && (Timer-tini) >= mtempo) return ' ';
switch(idx){
case SW3: brilho += 2; // KB4 incrementa contraste
case SW4: brilho --; // KB5 decrementa contraste
break;
case SW2: if(k==0) return ' ';
break;
case SW1: tempo=5;
break;
default: if(k) k--; break;
}
if(tempo > 0 && seg!=RTC_SEC) {
LCDcomando(0x86);
LCDputchar(tempo+'0');
LCDputchar(' ');
LCDcomando(0x87);
LCDputs(" T=");
if((--tempo) == 0) return ' ';
seg = RTC_SEC;
}
}
U0IER = 0; /* Disable interrupts */
idx = RxFifo0.rptr;
d = RxFifo0.buff[idx]; /* Get a byte from Rx buffer */
RxFifo0.rptr = (idx + 1) % BUFFER_SIZE;
RxFifo0.count--;
U0IER = 0x07; /* Enable interrupt */
return d;
}
int main(void)
{
unsigned char buffer[17]; // Where we are reading to
buffer[16] = '\0'; // Terminating string
int page = 0xa0;
int offset = 0;
init_timer0(); // LCD needs timer0 to function
LCDinit(); // Initializing LCD
ini_i2c(); // Initializing i2c
/******************** MAIN LOOP *********************/
while(1) {
offset &= 0xff;
buffer[0] = offset;
escreve_i2c(page, buffer, 1); /* tell i2c we want to read from page + offset */
if(le_i2c(page, buffer, 16)) { /* If we failed to read 16 bytes */
LCDclear();
LCDgoto(0, 0);
LCDputs("Problema de leitura");
LCDgoto(1, 0);
LCDputs(buffer);
} else {
LCDgoto(0, 0); // Go to first line, first column
LCDputs("Pg = ");
LCDputchar(page + '0'); // Prints page number as char
LCDgoto(0, 8); // Go to the second half of first line
LCDputs("Of = ");
LCDputchar(offset + '0'); // Prints offset as char
LCDgoto(1, 0); // Fisrt column of the second line
LCDputs(buffer); // Prints buffer
}
}
return 0;
}
/* Envia uma mensagem no LCD */
void LCDputs(char *txt)
{
while(*txt) LCDputchar(*txt++);
}
