webradio/firmware/main.c

130 lines
2.1 KiB
C

#include <avr/io.h>
#include <avr/interrupt.h>
#include <avr/pgmspace.h>
#include <util/delay.h>
#include "oled-display/lcd.h"
#include "input.h"
#include "systick.h"
#include "batmon.h"
#include "pm.h"
#define PORT_SPI(t) t##B
#define PIN_SPI_CS (1 << 2)
int dbg = 0;
void spi_init()
{
SPCR = (1 << SPE);
SPSR = (1 << SPI2X);
DDRB |= (1 << 4);
}
#define Y_MAX (DISPLAY_HEIGHT / 8 - 1)
uint8_t spi_proc()
{
static uint8_t new_data = 0;
static uint8_t x = 0;
static uint8_t y = Y_MAX;
uint8_t spi_cs;
static uint8_t spdr_next = 0;
spi_cs = !(PORT_SPI(PIN) & PIN_SPI_CS);
if (spi_cs) {
if (SPSR & (1 << SPIF)) {
switch (y) {
case Y_MAX - 1:
spdr_next = batmon_get_voltage();
break;
}
SPDR = spdr_next;
lcd_set_buffer(x, y, SPDR);
if (y == 0) {
y = Y_MAX;
x++;
if (x == DISPLAY_WIDTH) {
x = 0;
new_data = 1; // Only update the display if a full frame was received
}
} else {
y--;
}
}
} else {
if (new_data) {
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();
}
x = 0;
y = Y_MAX;
SPDR = get_switch_event();
spdr_next = get_rotary_delta();
}
return spi_cs;
}
void lcd_title(const char *msg1, const char *msg2)
{
lcd_clrscr();
lcd_gotoxy(0, 0);
lcd_puts_p(PSTR("== Internet Radio =="));
lcd_drawLine(0, 9, 120, 9, WHITE);
lcd_gotoxy(0, 2);
lcd_puts_p(msg1);
lcd_gotoxy(0, 3);
lcd_puts_p(msg2);
lcd_display();
}
int main()
{
char *post_msg;
uint8_t sched = 0;
MCUSR &= ~(1 << WDRF);
WDTCSR = (1 << WDCE);
cli();
suspend();
lcd_init(LCD_DISP_ON);
lcd_title(PSTR("Starting IOC Rev."), PSTR(GITREV));
spi_init();
systick_init();
input_init();
batmon_init();
if (post_msg = post()) {
lcd_title(PSTR("POST Error!"), post_msg);
_delay_ms(2000);
reset();
}
lcd_title(PSTR("Starting up."), PSTR("Please wait..."));
_delay_ms(10);
while (1) {
if (!spi_proc()) {
switch (sched) {
case 0:
timer_proc();
break;
case 1:
input_proc();
break;
}
}
sched = sched + 1;
if (sched == 4) {
sched = 0;
if (batmon_proc())
reset();
}
}
return 0;
}