int main(void) {
// Setup the external LED.
pin_mode(7, OUTPUT);
pin_mode(8, OUTPUT);
// Setup the input switch. Moving the switch to connect 4 and 5 will
// pull the value of 5 low, it's normally held high by the pull-up.
pin_mode(4, OUTPUT);
pin_mode(5, INPUT);
pin_out(5, TRUE);
for (;;) {
// If the switch is "off", the LED is on.
if (pin_in(5)) {
pin_out(7, FALSE);
} else {
pin_out(7, TRUE);
}
}
return 0;
}
int main(void) {
if (PM->RCAUSE.reg & (PM_RCAUSE_POR | PM_RCAUSE_BOD12 | PM_RCAUSE_BOD33)) {
// On powerup, force a clean reset of the MT7620
pin_low(PIN_SOC_RST);
pin_out(PIN_SOC_RST);
// turn off 3.3V to SoC
pin_low(PIN_SOC_PWR);
pin_out(PIN_SOC_PWR);
// pull 1.8V low
pin_low(PIN_18_V);
pin_out(PIN_18_V);
clock_init_crystal(GCLK_SYSTEM, GCLK_32K);
timer_clock_enable(TC_BOOT);
// hold everything low
boot_delay_ms(50); // power off for 50ms
pin_high(PIN_SOC_PWR);
boot_delay_ms(2); // 2ms until 1.8 rail comes on
pin_high(PIN_18_V);
boot_delay_ms(50); // 50ms before soc rst comes on
} else {
clock_init_crystal(GCLK_SYSTEM, GCLK_32K);
}
pin_mux(PIN_USB_DM);
pin_mux(PIN_USB_DP);
usb_init();
usb_attach();
NVIC_SetPriority(USB_IRQn, 0xff);
pin_high(PIN_LED);
pin_out(PIN_LED);
pin_in(PIN_SOC_RST);
pin_high(PIN_SOC_PWR);
pin_out(PIN_SOC_PWR);
pin_low(PORT_A.power);
pin_out(PORT_A.power);
pin_low(PORT_B.power);
pin_out(PORT_B.power);
pin_pull_up(PIN_BRIDGE_CS);
pin_pull_up(PIN_FLASH_CS);
pin_pull_up(PIN_SERIAL_TX);
pin_pull_up(PIN_SERIAL_RX);
dma_init();
NVIC_EnableIRQ(DMAC_IRQn);
NVIC_SetPriority(DMAC_IRQn, 0xff);
eic_init();
NVIC_EnableIRQ(EIC_IRQn);
NVIC_SetPriority(EIC_IRQn, 0xff);
evsys_init();
NVIC_EnableIRQ(EVSYS_IRQn);
NVIC_SetPriority(EVSYS_IRQn, 0);
adc_init(GCLK_SYSTEM, ADC_REFCTRL_REFSEL_INTVCC1);
dac_init(GCLK_32K);
bridge_init();
port_init(&port_a, 1, &PORT_A, GCLK_PORT_A,
TCC_PORT_A, DMA_PORT_A_TX, DMA_PORT_A_RX);
port_init(&port_b, 2, &PORT_B, GCLK_PORT_B,
TCC_PORT_B, DMA_PORT_B_TX, DMA_PORT_B_RX);
__enable_irq();
SCB->SCR |= SCB_SCR_SLEEPONEXIT_Msk;
init_systick();
while (1) { __WFI(); }
}