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/* USRP E310 Firmware
* Copyright (C) 2014 Ettus Research
* This file is part of the USRP E310 Firmware
* The USRP E310 Firmware 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.
* The USRP E310 Firmware is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
* You should have received a copy of the GNU General Public License
* along with the USRP E310 Firmware. If not, see <http://www.gnu.org/licenses/>.
*/
#include <avr/io.h>
#include <errno.h>
#include <avr/interrupt.h>
#include <avr/sleep.h>
#include "i2c_twi.h"
#include "spi.h"
#include "pmu.h"
#include "interrupt.h"
#include "io.h"
#include "fpga.h"
#include "eeprom.h"
#include "utils.h"
/* setup the fuses for compilation with avr-gcc
* - use the internal 8 MHz oscillator
* - slowly rising power (startup time)
* - save the eeprom between flashes, leave SPI enabled for flashing
*/
FUSES = {
.low = (FUSE_CKSEL0 & FUSE_SUT0),
.high = (FUSE_EESAVE & FUSE_SPIEN),
.extended = EFUSE_DEFAULT,
};
int main(void)
{
/* if a reset was caused by watchdog, clear flag, enable wd change bit, disable */
if (MCUSR & BIT(WDRF)) {
MCUSR &= ~BIT(WDRF);
WDTCSR |= BIT(WDCE) | BIT(WDE);
WDTCSR = 0x00;
}
i2c_twi_init(I2C_SPEED_100K);
spi_init(SPI_TYPE_MASTER, SPI_MSB_FIRST, SPI_MODE_0, SPI_SPEED_2M);
pmu_init();
if (eeprom_get_autoboot())
pmu_power_on();
sei();
while (1) {
pmu_handle_events();
}
return 0;
}
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