csl_mcbspioread.c

TI达芬奇dm644x各硬件模块测试代码

/** \file csl_mcbspIoRead.c
 *
 *  \brief    File for functional layer of CSL API \a CSL_mcbspIoRead()
 *
 *  Description
 *    - The \a CSL_mcbspIoRead() function contains definition of the
 *      functional layer CSL API
 *
 *  Path: \\(CSLPATH)\\ipmodules\\mcbsp\\src
 *
 */


#include <csl_mcbsp.h>

#pragma CODE_SECTION (CSL_mcbspIoRead, ".text:csl_section:mcbsp");

/**
 * Reads the data from MCBSP pin which is configured as general purpose input.
 * The 16-bit data read from this pin is returned by this API. MCBSP pin to use
 * in this read operation is identified by the second arguement.
 *
 * <b> Usage Constraints: </b>
 * Both @a CSL_mcbspInit() and @a CSL_mcbspOpen() must be called successfully
 * in that order before @a CSL_mcbspIoRead() can be called.
 *
 * @b Example:
 * @verbatim

      Uint16     inData, clkx_data, clkr_data;
      CSL_Status status;
      CSL_BitMask16 inMask;
      CSL_McbspHandle hMcbsp;
      ...
      // MCBSP object defined and HwSetup structure defined and initialized
      ...

      // Init, Open, HwSetup successfully done in that order
      ...
      inMask = CSL_MCBSP_IO_CLKX | CSL_MCBSP_IO_CLKR;
      inData = CSL_mcbspIoRead(hMcbsp, inMask);
      if ((inData & CSL_MCBSP_IO_CLKX) != 0) clkx_data = 1;
      else clkx_data = 0;
      if ((inData & CSL_MCBSP_IO_CLKR) != 0) clkr_data = 1;
      else clkr_data = 0;
   @endverbatim
 *
 * @return Uint16 : data read from the pin(s)
 */
Uint16  CSL_mcbspIoRead(
    /** MCBSP handle returned by successful 'open' */
    CSL_McbspHandle                         hMcbsp,
    /** MCBSP pin to be used as general purpose input */
    CSL_BitMask16                           inputSel
)
{
    Uint16 ret_value = 0;

    if(inputSel & CSL_MCBSP_IO_CLKX)
    {

        if( CSL_FEXT( hMcbsp->regs->PCR, MCBSP_PCR_CLKXP ) )
            ret_value |= CSL_MCBSP_IO_CLKX;
    }

    if(inputSel & CSL_MCBSP_IO_FSX)
    {

        if( CSL_FEXT( hMcbsp->regs->PCR, MCBSP_PCR_FSXP ) )
            ret_value |= CSL_MCBSP_IO_FSX;
    }

    if(inputSel & CSL_MCBSP_IO_CLKR)
    {

        if( CSL_FEXT( hMcbsp->regs->PCR, MCBSP_PCR_CLKRP ) )
            ret_value |= CSL_MCBSP_IO_CLKR;
    }

    if(inputSel & CSL_MCBSP_IO_FSR)
    {

        if( CSL_FEXT( hMcbsp->regs->PCR, MCBSP_PCR_FSRP ) )
            ret_value |= CSL_MCBSP_IO_FSR;
    }

    if(inputSel & CSL_MCBSP_IO_DR)
    {

        if( CSL_FEXT( hMcbsp->regs->PCR, MCBSP_PCR_DRSTAT ) )
            ret_value |= CSL_MCBSP_IO_DR;
    }

    if(inputSel & CSL_MCBSP_IO_CLKS)
    {

        if( CSL_FEXT( hMcbsp->regs->PCR, MCBSP_PCR_CLKSSTAT ) )
            ret_value |= CSL_MCBSP_IO_CLKS;
    }

    return( ret_value );
}