Esempio n. 1
0
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;
}
Esempio n. 2
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(); }
}