--- /dev/null
+/*
+ * fw/board_app.c - Board-specific functions (for the application)
+ *
+ * Written 2011, 2013 by Werner Almesberger
+ * Copyright 2011, 2013 Werner Almesberger
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+
+#include <stddef.h>
+#include <stdbool.h>
+#include <stdint.h>
+
+#include <avr/io.h>
+#include <avr/interrupt.h>
+
+#define F_CPU 8000000UL
+#include <util/delay.h>
+
+#include "usb.h"
+#include "at86rf230.h"
+#include "spi.h"
+#include "mac.h"
+#include "board.h"
+
+
+static volatile uint32_t timer_h = 0; /* 2^(16+32) / 8 MHz = ~1.1 years */
+
+
+void reset_cpu(void)
+{
+ WDTCSR = 1 << WDE;
+}
+
+
+uint8_t read_irq(void)
+{
+ return PIN(IRQ_RF);
+}
+
+
+void slp_tr(void)
+{
+ SET(SLP_TR);
+ CLR(SLP_TR);
+}
+
+
+ISR(TIMER1_OVF_vect)
+{
+ timer_h++;
+}
+
+
+uint64_t timer_read(void)
+{
+ uint32_t high;
+ uint8_t low, mid;
+
+ do {
+ if (TIFR1 & (1 << TOV1)) {
+ TIFR1 = 1 << TOV1;
+ timer_h++;
+ }
+ high = timer_h;
+ low = TCNT1L;
+ mid = TCNT1H;
+ }
+ while (TIFR1 & (1 << TOV1));
+
+ /*
+ * We need all these casts because the intermediate results are handled
+ * as if they were signed and thus get sign-expanded. Sounds wrong-ish.
+ */
+ return (uint64_t) high << 16 | (uint64_t) mid << 8 | (uint64_t) low;
+}
+
+
+void timer_init(void)
+{
+ /* configure timer 1 as a free-running CLK counter */
+
+ TCCR1A = 0;
+ TCCR1B = 1 << CS10;
+
+ /* enable timer overflow interrupt */
+
+ TIMSK1 = 1 << TOIE1;
+}
+
+
+bool gpio(uint8_t port, uint8_t data, uint8_t dir, uint8_t mask, uint8_t *res)
+{
+ EIMSK = 0; /* recover INT_RF to ATUSB_GPIO_CLEANUP or an MCU reset */
+
+ switch (port) {
+ case 1:
+ DDRB = (DDRB & ~mask) | dir;
+ PORTB = (PORTB & ~mask) | data;
+ break;
+ case 2:
+ DDRC = (DDRC & ~mask) | dir;
+ PORTC = (PORTC & ~mask) | data;
+ break;
+ case 3:
+ DDRD = (DDRD & ~mask) | dir;
+ PORTD = (PORTD & ~mask) | data;
+ break;
+ default:
+ return 0;
+ }
+
+ /* disable the UART so that we can meddle with these pins as well. */
+ spi_off();
+ _delay_ms(1);
+
+ switch (port) {
+ case 1:
+ res[0] = PINB;
+ res[1] = PORTB;
+ res[2] = DDRB;
+ break;
+ case 2:
+ res[0] = PINC;
+ res[1] = PORTC;
+ res[2] = DDRC;
+ break;
+ case 3:
+ res[0] = PIND;
+ res[1] = PORTD;
+ res[2] = DDRD;
+ break;
+ }
+
+ return 1;
+}
+
+
+void gpio_cleanup(void)
+{
+ EIMSK = 1 << 0;
+}
+
+
+static void done(void *user)
+{
+ led(0);
+}
+
+
+uint8_t irq_serial;
+
+#if defined(ATUSB) || defined(HULUSB)
+ISR(INT0_vect)
+#endif
+#ifdef RZUSB
+ISR(TIMER1_CAPT_vect)
+#endif
+{
+ if (mac_irq) {
+ if (mac_irq())
+ return;
+ }
+ if (eps[1].state == EP_IDLE) {
+ led(1);
+ irq_serial = (irq_serial+1) | 0x80;
+ usb_send(&eps[1], &irq_serial, 1, done, NULL);
+ }
+}