File content as of revision 71:7b5ebd969aa7:

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/*!
 ******************************************************************************
 * @file:
 * @brief:  ADMW OS-dependent wrapper layer for GPIO interface
 *-----------------------------------------------------------------------------
 */

#include <mbed.h>

#include "inc/admw_gpio.h"
#include "inc/admw_log.h"

class GpioContext
{
public:
    GpioContext(
        PinName resetPin,
        PinName csPin,
        PinName alertErrorPin,
        PinName datareadyPin)
        : _reset(resetPin),
          _cs(csPin),
          _alertError(alertErrorPin),
          _dataready(datareadyPin),
          _alertErrorIrq(alertErrorPin),
          _datareadyIrq(datareadyPin) {}

    ADMW_RESULT get(
        ADMW_GPIO_PIN ePinId,
        bool *pState);

    ADMW_RESULT set(
        ADMW_GPIO_PIN ePinId,
        bool state);

    ADMW_RESULT enableIrq(
        ADMW_GPIO_PIN ePinId,
        ADMW_GPIO_CALLBACK callbackFn,
        void *pArg);

    ADMW_RESULT disableIrq(
        ADMW_GPIO_PIN ePinId);

private:
    DigitalOut  _reset;
    DigitalOut  _cs;
    
    DigitalIn   _alertError;
    DigitalIn   _dataready;

    InterruptIn _alertErrorIrq;
    InterruptIn _datareadyIrq;

    ADMW_GPIO_CALLBACK _alertErrorIrqCallback;
    ADMW_GPIO_CALLBACK _datareadyIrqCallback;

    void *_alertErrorIrqArg;
    void *_datareadyIrqArg;

    void _alertErrorIrqHandler()
    {
        _alertErrorIrqCallback(ADMW_GPIO_PIN_ALERT_ERROR, _alertErrorIrqArg);
    }
    void _datareadyIrqHandler()
    {
        _datareadyIrqCallback(ADMW_GPIO_PIN_DATAREADY, _datareadyIrqArg);
    }
};

ADMW_RESULT GpioContext::get(
    ADMW_GPIO_PIN ePinId,
    bool *pState)
{
    switch(ePinId)
    {
    case ADMW_GPIO_PIN_ALERT_ERROR:
        *pState = _alertError;
        return ADMW_SUCCESS;
    case ADMW_GPIO_PIN_DATAREADY:
        *pState = _dataready;
        return ADMW_SUCCESS;
    case ADMW_GPIO_PIN_RESET:
        *pState = _reset;
        return ADMW_SUCCESS;
    case ADMW_GPIO_PIN_CS:
        *pState = _cs;
        return ADMW_SUCCESS;
    default:
        return ADMW_INVALID_DEVICE_NUM;
    }
}

ADMW_RESULT GpioContext::set(
    ADMW_GPIO_PIN ePinId,
    bool state)
{
    switch(ePinId)
    {
    case ADMW_GPIO_PIN_RESET:
        _reset = state;
        break;
    case ADMW_GPIO_PIN_CS:
        _cs = state;
        break;
    default:
        return ADMW_INVALID_DEVICE_NUM;
    }

    return ADMW_SUCCESS;
}

ADMW_RESULT GpioContext::enableIrq(
    ADMW_GPIO_PIN ePinId,
    ADMW_GPIO_CALLBACK callbackFn,
    void *pArg)
{
    switch(ePinId)
    {
    case ADMW_GPIO_PIN_ALERT_ERROR:
        _alertErrorIrqCallback = callbackFn;
        _alertErrorIrqArg = pArg;
        _alertErrorIrq.rise(callback(this, &GpioContext::_alertErrorIrqHandler));
        return ADMW_SUCCESS;
    case ADMW_GPIO_PIN_DATAREADY:
        _datareadyIrqCallback = callbackFn;
        _datareadyIrqArg = pArg;
        _datareadyIrq.rise(callback(this, &GpioContext::_datareadyIrqHandler));
        return ADMW_SUCCESS;
    default:
        return ADMW_INVALID_DEVICE_NUM;
    }
}

ADMW_RESULT GpioContext::disableIrq(
    ADMW_GPIO_PIN ePinId)
{
    switch(ePinId) {
        case ADMW_GPIO_PIN_ALERT_ERROR:
            _alertErrorIrq.rise(NULL);
            return ADMW_SUCCESS;
        case ADMW_GPIO_PIN_DATAREADY:
            _datareadyIrq.rise(NULL);
            return ADMW_SUCCESS;
        default:
            return ADMW_INVALID_DEVICE_NUM;
    }
}

#ifdef __cplusplus
extern "C" {
#endif

/*
 * Open the GPIO interface and allocate resources
 */
ADMW_RESULT admw_GpioOpen(
    ADMW_PLATFORM_GPIO_CONFIG *pConfig,
    ADMW_GPIO_HANDLE *phDevice)
{
    GpioContext *pCtx = new GpioContext((PinName)pConfig->resetPin,
                                        (PinName)pConfig->csPin,
                                        (PinName)pConfig->alertErrorPin,
                                        (PinName)pConfig->datareadyPin);
    if (!pCtx) {
        ADMW_LOG_ERROR("Failed to allocate memory for GPIO context");
        return ADMW_NO_MEM;
    }

    *phDevice = reinterpret_cast<ADMW_GPIO_HANDLE>(pCtx);
    return ADMW_SUCCESS;
}

/*
 * Get the state of the specified GPIO pin
 */
ADMW_RESULT admw_GpioGet(
    ADMW_GPIO_HANDLE hDevice,
    ADMW_GPIO_PIN ePinId,
    bool *pbState)
{
    GpioContext *pCtx = reinterpret_cast<GpioContext *>(hDevice);

    return pCtx->get(ePinId, pbState);
}

/*
 * Set the state of the specified GPIO pin
 */
ADMW_RESULT admw_GpioSet(
    ADMW_GPIO_HANDLE hDevice,
    ADMW_GPIO_PIN ePinId,
    bool bState)
{
    GpioContext *pCtx = reinterpret_cast<GpioContext *>(hDevice);

    return pCtx->set(ePinId, bState);
}

/*
 * Enable interrupt notifications on the specified GPIO pin
 */
ADMW_RESULT admw_GpioIrqEnable(
    ADMW_GPIO_HANDLE hDevice,
    ADMW_GPIO_PIN ePinId,
    ADMW_GPIO_CALLBACK callback,
    void *arg)
{
    GpioContext *pCtx = reinterpret_cast<GpioContext *>(hDevice);

    return pCtx->enableIrq(ePinId, callback, arg);
}

/*
 * Disable interrupt notifications on the specified GPIO pin
 */
ADMW_RESULT admw_GpioIrqDisable(
    ADMW_GPIO_HANDLE hDevice,
    ADMW_GPIO_PIN ePinId)
{
    GpioContext *pCtx = reinterpret_cast<GpioContext *>(hDevice);

    return pCtx->disableIrq(ePinId);
}

/*
 * Close the GPIO interface and free resources
 */
void admw_GpioClose(
    ADMW_GPIO_HANDLE hDevice)
{
    GpioContext *pCtx = reinterpret_cast<GpioContext *>(hDevice);

    delete pCtx;
}

#ifdef __cplusplus
}
#endif