Example #1
0
void pin_dir_mode(PinName name, PinDirection direction, PinMode mode)
{
    MBED_ASSERT(name != (PinName)NC);

    unsigned int port = PINNAME_TO_PORT(name);
    unsigned int pin = PINNAME_TO_PIN(name);

    /* Set function; Firmware Control (GPIO mode) */
    MXC_GPIO->func_sel[port] &= ~(0xF << (4 * pin));

    /* Normal input is always enabled */
    MXC_GPIO->in_mode[port] &= ~(0xF << (4 * pin));

    uint32_t new_mode;
    if (direction == PIN_OUTPUT) {
        // PullUp      = not valid,
        // PullDown    = not valid,
        // OpenDrain   = MXC_V_GPIO_OUT_MODE_OD,
        // PullNone    = MXC_V_GPIO_OUT_MODE_NORMAL,
        if (mode == OpenDrain) {
            new_mode = MXC_V_GPIO_OUT_MODE_OPEN_DRAIN;
        } else {
            new_mode = MXC_V_GPIO_OUT_MODE_NORMAL;
        }
    } else {
        // PullUp      = MXC_V_GPIO_OUT_MODE_HIGH_Z_WEAK_PULLUP
        // PullDown    = MXC_V_GPIO_OUT_MODE_HIGH_Z_WEAK_PULLDOWN
        // OpenDrain   = MXC_V_GPIO_OUT_MODE_OD
        // PullNone    = MXC_V_GPIO_OUT_MODE_NORMAL_HIGH_Z
        if (mode == PullUp) {
            new_mode = MXC_V_GPIO_OUT_MODE_HIGH_Z_WEAK_PULLUP;
            MXC_GPIO->out_val[port] |= 1 << pin;
        } else if (mode == PullDown) {
            new_mode = MXC_V_GPIO_OUT_MODE_HIGH_Z_WEAK_PULLDOWN;
            MXC_GPIO->out_val[port] &= ~(1 << pin);
        } else if (mode == OpenDrain) {
            new_mode = MXC_V_GPIO_OUT_MODE_OPEN_DRAIN;
            MXC_GPIO->out_val[port] |= 1 << pin;
        } else {
            new_mode = MXC_V_GPIO_OUT_MODE_NORMAL_HIGH_Z;
            MXC_GPIO->out_val[port] &= ~(1 << pin);
        }
    }

    /* Set new mode */
    uint32_t out_mode = MXC_GPIO->out_mode[port];
    out_mode &= ~(0xF << (pin * 4));
    out_mode |= (new_mode << (pin * 4));
    MXC_GPIO->out_mode[port] = out_mode;
}
Example #2
0
gpio_irq_t *gpio_irq_get_obj(PinName name)
{
    if (name == NC) {
        return NULL;
    }

    unsigned int port = PINNAME_TO_PORT(name);
    unsigned int pin = PINNAME_TO_PIN(name);

    if ((port > MXC_GPIO_NUM_PORTS) || (pin > MXC_GPIO_MAX_PINS_PER_PORT)) {
        return NULL;
    }

    return objs[port][pin];
}
Example #3
0
int gpio_irq_init(gpio_irq_t *obj, PinName name, gpio_irq_handler handler, uint32_t id)
{
    if (name == NC) {
        return -1;
    }

    uint8_t port = PINNAME_TO_PORT(name);
    uint8_t pin = PINNAME_TO_PIN(name);

    if ((port > MXC_GPIO_NUM_PORTS) || (pin > MXC_GPIO_MAX_PINS_PER_PORT)) {
        return 1;
    }

    obj->port = port;
    obj->pin = pin;
    obj->id = id;
    objs[port][pin] = obj;

    /* register handlers */
    irq_handler = handler;
    NVIC_SetVector(GPIO_P0_IRQn, (uint32_t)gpio_irq_0);
    NVIC_SetVector(GPIO_P1_IRQn, (uint32_t)gpio_irq_1);
    NVIC_SetVector(GPIO_P2_IRQn, (uint32_t)gpio_irq_2);
    NVIC_SetVector(GPIO_P3_IRQn, (uint32_t)gpio_irq_3);
    NVIC_SetVector(GPIO_P4_IRQn, (uint32_t)gpio_irq_4);
    NVIC_SetVector(GPIO_P5_IRQn, (uint32_t)gpio_irq_5);
    NVIC_SetVector(GPIO_P6_IRQn, (uint32_t)gpio_irq_6);

    /* request WUD in case the application is going to sleep */
    gpio_irq_wud_req(obj);

    /* disable the interrupt locally */
    MXC_GPIO->int_mode[port] &= ~(0xF << (pin*4));

    /* clear a pending request */
    MXC_GPIO->intfl[port] = 1 << pin;

    /* enable the requested interrupt */
    MXC_GPIO->inten[port] |= (1 << pin);
    NVIC_EnableIRQ((IRQn_Type)((uint32_t)GPIO_P0_IRQn + port));

    return 0;
}
Example #4
0
void gpio_init(gpio_t *obj, PinName name)
{
    obj->name = name;
    if (name == (PinName)NC) {
        return;
    }

    unsigned int port = PINNAME_TO_PORT(name);
    unsigned int pin = PINNAME_TO_PIN(name);

    obj->reg_out = (uint32_t*)BITBAND(&MXC_GPIO->out_val[port], pin);
    obj->reg_in = (uint32_t*)BITBAND(&MXC_GPIO->in_val[port], pin);
    obj->mode = PullDefault;

    /* Ensure that the GPIO clock is enabled */
    MXC_CLKMAN->clk_gate_ctrl1 |= MXC_F_CLKMAN_CLK_GATE_CTRL1_GPIO_CLK_GATER;

    /* Ensure that the GPIO clock is enabled */
    MXC_CLKMAN->sys_clk_ctrl_6_gpio = MXC_S_CLKMAN_CLK_SCALE_DIV_1;
}