webradio/firmware/main.c

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#include <avr/io.h>
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#include <avr/interrupt.h>
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#include <avr/pgmspace.h>
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#include <util/delay.h>
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#include "oled-display/lcd.h"
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#include "input.h"
#include "systick.h"
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#define PORT_SPI(t) t##B
#define PIN_SPI_CS (1 << 2)
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int dbg = 0;
void spi_init()
{
SPCR = (1 << SPE);
SPSR = (1 << SPI2X);
DDRB |= (1 << 4);
}
#define Y_MAX (DISPLAY_HEIGHT / 8 - 1)
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uint8_t spi_proc()
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{
static uint8_t new_data = 0;
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static uint8_t x = 0;
static uint8_t y = Y_MAX;
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uint8_t spi_cs;
static uint8_t spdr_next = 0;
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spi_cs = !(PORT_SPI(PIN) & PIN_SPI_CS);
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if (spi_cs) {
if (SPSR & (1 << SPIF)) {
SPDR = spdr_next;
switch (y) {
case Y_MAX:
spdr_next = 55; // TODO: Vbat
break;
}
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lcd_set_buffer(x, y, SPDR);
if (y == 0) {
y = Y_MAX;
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x++;
if (x == DISPLAY_WIDTH) {
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x = 0;
new_data = 1; // Only update the display if a full frame was received
}
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} else {
y--;
}
}
} else {
if (new_data) {
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lcd_display();
new_data = 0;
} else if ((y == Y_MAX - 3) && (x == 0)) { // If the last one was a I/O frame
input_clear_events();
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}
x = 0;
y = Y_MAX;
SPDR = get_switch_event();
spdr_next = get_rotary_delta();
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}
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return spi_cs;
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}
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void lcd_startup()
{
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lcd_init(LCD_DISP_ON);
lcd_gotoxy(0, 0);
lcd_puts_p(PSTR("== Internet Radio =="));
lcd_drawLine(0, 9, 120, 9, WHITE);
lcd_gotoxy(0, 2);
lcd_puts_p(PSTR("Starting up."));
lcd_gotoxy(0, 3);
lcd_puts_p(PSTR("Please wait..."));
lcd_display();
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}
int main()
{
cli();
lcd_startup();
spi_init();
systick_init();
input_init();
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_delay_ms(10);
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while (1) {
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if (!spi_proc()) {
timer_proc();
input_proc();
}
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}
return 0;
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}