Function rt_acmp_control

bsp/efm32/drv_acmp.c:92–172

/ * @brief * Configure ACMP device * * @details * * @note * * @param[in] dev * Pointer to device descriptor * * @param[in] cmd * ACMP control command * * @param[in] args * Arguments * * @return * Error code ******************************************************************************/

 *  Error code
 ******************************************************************************/
static rt_err_t rt_acmp_control(
    rt_device_t     dev,
    rt_uint8_t      cmd,
    void            *args)
{
    RT_ASSERT(dev != RT_NULL);

    struct efm32_acmp_device_t *acmp;

    acmp = (struct efm32_acmp_device_t *)(dev->user_data);

    switch (cmd)
    {
    case RT_DEVICE_CTRL_SUSPEND:
        /* Suspend device */
        dev->flag |= RT_DEVICE_FLAG_SUSPENDED;
        ACMP_Disable(acmp->acmp_device);
        break;

    case RT_DEVICE_CTRL_RESUME:
        /* Resume device */
        dev->flag &= ~RT_DEVICE_FLAG_SUSPENDED;
        ACMP_Enable(acmp->acmp_device);
        break;

    case RT_DEVICE_CTRL_ACMP_INIT:
        {
            rt_bool_t int_en = false;
            struct efm32_acmp_control_t *control;

            control = (struct efm32_acmp_control_t *)args;
            acmp_debug("ACMP: control -> init start\n");

            /* Configure ACMPn */
            if (control->init == RT_NULL)
            {
                return -RT_ERROR;
            }
            ACMP_Init(acmp->acmp_device, control->init);
            ACMP_ChannelSet(acmp->acmp_device, control->negInput, control->posInput);
            if (control->output != RT_NULL)
            {
                ACMP_GPIOSetup(
                    acmp->acmp_device,
                    control->output->location,
                    control->output->enable,
                    control->output->invert);
                int_en = true;
            }
            if (control->hook.cbFunc != RT_NULL)
            {
                acmp->hook.cbFunc = control->hook.cbFunc;
                acmp->hook.userPtr = control->hook.userPtr;
                int_en = true;
            }

            if (int_en)
            {