mc33972.cpp File Reference

Enumerations
enum	mc33972_drv_state { MC33972_DISABLED = 0 , MC33972_WAIT_INIT , MC33972_READY , MC33972_FAILED }

Functions
static	THD_FUNCTION (mc33972_driver_thread, p)
int	mc33972_add (brain_pin_e base, unsigned int index, const struct mc33972_config *cfg)
	MC33972 driver add.

Variables
static Mc33972	chips [BOARD_MC33972_COUNT]

Enumeration Type Documentation

mc33972_drv_state

enum mc33972_drv_state

Enumerator
MC33972_DISABLED
MC33972_WAIT_INIT
MC33972_READY
MC33972_FAILED

Definition at line 37 of file mc33972.cpp.

             {
    MC33972_DISABLED = 0,
    MC33972_WAIT_INIT,
    MC33972_READY,
    MC33972_FAILED
} mc33972_drv_state;

Function Documentation

mc33972_add()

int mc33972_add	(	brain_pin_e	base,
		unsigned int	index,
		const struct mc33972_config *	cfg
	)

MC33972 driver add.

Checks for valid config

Definition at line 414 of file mc33972.cpp.

{
    /* no config or no such chip */
    if ((!cfg) || (!cfg->spi_bus) || (index >= BOARD_MC33972_COUNT))
        return -1;
 
    /* check for valid cs.
     * TODO: remove this check? CS can be driven by SPI */
    if (!cfg->spi_config.ssport) {
        return -1;
    }
 
    Mc33972& chip = chips[index];
 
    /* already initted? */
    if (chip.cfg != NULL)
        return -1;
 
    chip.cfg = cfg;
    chip.i_state = 0;
    chip.drv_state = MC33972_WAIT_INIT;
 
    /* register, return gpio chip base */
    return gpiochip_register(base, DRIVER_NAME, chip, MC33972_INPUTS);
}

Referenced by initSmartGpio().

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THD_FUNCTION()

static THD_FUNCTION ( mc33972_driver_thread  , p    )

static

Definition at line 291 of file mc33972.cpp.

{
    int ret;
    Mc33972 *chip = reinterpret_cast<Mc33972*>(p);
 
    chRegSetThreadName(DRIVER_NAME);
 
    /* repeat init until success */
    do {
        ret = chip->chip_init();
        if (ret) {
            chThdSleepMilliseconds(1000);
            continue;
        }
        /* else */
        chip->drv_state = MC33972_READY;
    } while (chip->drv_state != MC33972_READY);
 
    while(1) {
        msg_t msg = chSemWaitTimeout(&chip->wake, TIME_MS2I(MC33972_POLL_INTERVAL_MS));
 
        if ((chip->cfg == NULL) ||
            (chip->drv_state == MC33972_DISABLED) ||
            (chip->drv_state == MC33972_FAILED))
            continue;
 
        if (msg == MSG_TIMEOUT) {
            /* only input state update */
            ret = chip->update_status();
        } else {
            /* someone waked thread and asks us to update pin config */
            /* inputs state is also read */
            ret = chip->update_pullups();
        }
 
        if (ret) {
            /* set state to MC33972_FAILED? */
        }
    }
}

Variable Documentation

chips

Mc33972 chips[BOARD_MC33972_COUNT]

static

Definition at line 124 of file mc33972.cpp.

Referenced by mc33972_add().

Go to the source code of this file.