csl_mcbspiowrite.c

TI达芬奇dm644x各硬件模块测试代码

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

#include <csl_mcbsp.h>

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

/**
 * Sends the data using MCBSP pin which is configured as general purpose output.
 * The 16-bit data trasnmitted is specified by 'outputData' argument. MCBSP pin
 * to use in this write 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_mcbspIoWrite() can be called.
 *
 * @b Example:
 * @verbatim

      Uint16     outData;
      CSL_Status status;
      CSL_McbspHandle hMcbsp;
      ...
      // MCBSP object defined and HwSetup structure defined and initialized
      ...

      // Init, Open, HwSetup successfully done in that order
      ...
      outData = 1;
      inData = CSL_mcbspIoWrite(hMcbsp, CSL_MCBSP_IO_CLKX, outData);
   @endverbatim
 *
 * @return void
 */
void  CSL_mcbspIoWrite(
    /** MCBSP handle returned by successful 'open' */
    CSL_McbspHandle                         hMcbsp,
    /** MCBSP pin to be used as general purpose output */
    CSL_BitMask16                           outputSel,
    /** 1 bit output data to be transmitted */
    Uint16                              outputData
)
{

    Uint16 bit_val, _pcrval;

    _pcrval = hMcbsp->regs->PCR;

    if(outputSel & CSL_MCBSP_IO_CLKX)
    {
        bit_val = !(!(outputData & CSL_MCBSP_IO_CLKX));
        CSL_FINS( _pcrval, MCBSP_PCR_CLKXP,bit_val );
    }

    if(outputSel & CSL_MCBSP_IO_FSX)
    {
        bit_val = !(!(outputData & CSL_MCBSP_IO_FSX));
        CSL_FINS( _pcrval, MCBSP_PCR_FSXP, bit_val );
    }

    if(outputSel & CSL_MCBSP_IO_DX)
    {
        bit_val = !(!(outputData & CSL_MCBSP_IO_DX));
        CSL_FINS( _pcrval, MCBSP_PCR_DXSTAT, bit_val );
    }


    if(outputSel & CSL_MCBSP_IO_CLKR)
    {
        bit_val = !(!(outputData & CSL_MCBSP_IO_CLKR));
        CSL_FINS( _pcrval, MCBSP_PCR_CLKRP, bit_val );
    }

    if(outputSel & CSL_MCBSP_IO_FSR)
    {
        bit_val = !(!(outputData & CSL_MCBSP_IO_FSR ));
        CSL_FINS( _pcrval, MCBSP_PCR_FSRP, bit_val );
    }
    hMcbsp->regs->PCR = _pcrval;
}