csl_gpiohwcontrol.c

TI达芬奇dm644x各硬件模块测试代码

/*  ============================================================================
 *   Copyright (c) Texas Instruments Inc 2002, 2003, 2004, 2005                 
 *                                                                              
 *   Use of this software is controlled by the terms and conditions found in the
 *   license agreement under which this software has been supplied.             
 *   ===========================================================================
 */ 

/** \file csl_gpioHwControl.c
 *
 *  \brief    File for functional layer of CSL API \a CSL_gpioHwControl()
 *
 *  Description
 *    - The \a CSL_gpioHwControl() function definition & it's associated
 *      functions
 *
 *  Path: \\(CSLPATH)\\ipmodules\\gpio\\src
 *
 *  \date 10 June, 2004
 *  \author Pratheesh Gangadhar
 */

/* ============================================================================
 *  Revision History
 *  ===============
 *  22-Feb-2005 Nsr Added conrol command CSL_GPIO_CMD_GET_BIT according to 
 *                  TI Issue PSG00000310. 
 *  04-Sep-2004 Nsr Updated the source csl_gpioHwControl.c for the new CSL 
 *                  format.
 *
 * ============================================================================
 */

#include <csl_gpio.h>
#include <csl_gpioAux.h>

/** ===========================================================================
 *   @n@b CSL_gpioHwControl
 *
 *   @b Description
 *   @n Takes a command of GPIO with an optional argument & implements it.
 *
 *   @b Arguments
 *   @verbatim
            hGpio            Handle to the GPIO instance

            cmd             The command to this API indicates the action to be
                            taken on GPIO.

            arg             An optional argument.
     @endverbatim
 *
 *   <b> Return Value </b>  CSL_Status
 *   @li                    CSL_SOK             - Status info return successful.
 *   @li                    CSL_ESYS_BADHANDLE  - Invalid handle
 *   @li                    CSL_ESYS_INVCMD     - Invalid command
 *   @li                    CSL_ESYS_FAIL       - Invalid instance number
 *
 *   <b> Pre Condition </b>
 *   @n  None
 *
 *   <b> Post Condition </b>
 *   @n  None
 *
 *   @b Modifies
 *   @n The hardware registers of GPIO.
 *
 *   @b Example
 *   @verbatim
        CSL_GpioHandle         hGpio;
        CSL_GpioHwControlCmd   cmd;
        void                   arg;

        status = CSL_gpioHwControl (hGpio, cmd, &arg);

     @endverbatim
 * ============================================================================
 */
#pragma CODE_SECTION (CSL_gpioHwControl, ".text:csl_section:gpio");
CSL_Status CSL_gpioHwControl( 
    CSL_GpioHandle        hGpio,
    CSL_GpioHwControlCmd  cmd, 
    void                  *arg
)
{
    CSL_Status status = CSL_SOK;
    Int16      pinVal;
    
    pinVal = pinVal;	/* Make compiler happy! */
    
    if (hGpio == NULL)
        return CSL_ESYS_BADHANDLE;
    
    switch (cmd) {
        case CSL_GPIO_CMD_BANK_INT_ENABLE:
            status = CSL_gpioBankIntEnable (hGpio, *((CSL_GpioBankNum*) arg));
            break;
            
        case CSL_GPIO_CMD_BANK_INT_DISABLE:
            status = CSL_gpioBankIntDisable (hGpio,*((CSL_GpioBankNum*) arg));
            break;
            
        case CSL_GPIO_CMD_CONFIG_BIT:
            status = CSL_gpioConfigBit (hGpio,(CSL_GpioConfig*) arg);  
            break;
            
        case CSL_GPIO_CMD_SET_BIT:
            status = CSL_gpioSetBit (hGpio,*((CSL_GpioPinNum*) arg));    
            break;
            
        case CSL_GPIO_CMD_CLEAR_BIT:
            status = CSL_gpioClearBit (hGpio,*((CSL_GpioPinNum*) arg));
            break;          
        
        case CSL_GPIO_CMD_GET_INTSTATUS:
            status = CSL_gpioGetIntStatus (hGpio,(CSL_GpioBankData*) arg);      
            break;  
            
        case CSL_GPIO_CMD_GET_INPUTBIT:
            status = CSL_gpioGetInputBit (hGpio,(CSL_GpioBankData*) arg);  
            break;  
            
        case CSL_GPIO_CMD_GET_OUTDRVSTATE:
            status = CSL_gpioGetOutDrvState (hGpio,(CSL_GpioBankData*) arg);  
            break;          

        case CSL_GPIO_CMD_GET_BIT:
            pinVal = CSL_gpioGetBit (hGpio,*((CSL_GpioPinNum*) arg));    
            break;

        
        default:
            status = CSL_ESYS_INVCMD;
            break;
    }
    
    return status;
}