text: /*******************************************************************************
    SPI Driver Functions for Dynamic Standard Buffer Driver Tasks Functions
  
    Company:
      Microchip Technology Inc.
  
    File Name:
      drv_spi_dynamic_rm_tasks.c
  
    Summary:
      SPI driver tasks functions
  
    Description:
      The SPI device driver provides a simple interface to manage the SPI
      modules on Microchip microcontrollers. This file contains implemenation
      for the SPI driver.
  
    Remarks:
    This file is generated from framework/driver/spi/template/drv_spi_dynamic_ebm_tasks.c.ftl
  *******************************************************************************/
  
  //DOM-IGNORE-BEGIN
  /*******************************************************************************
  Copyright 2017 Microchip Technology Incorporated and its subsidiaries.
  
  Permission is hereby granted, free of charge, to any person obtaining a copy of 
  this software and associated documentation files (the "Software"), to deal in 
  the Software without restriction, including without limitation the rights to 
  use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies 
  of the Software, and to permit persons to whom the Software is furnished to do 
  so, subject to the following conditions:
  The above copyright notice and this permission notice shall be included in all 
  copies or substantial portions of the Software.
  
  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 
  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 
  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 
  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 
  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 
  SOFTWARE
  *******************************************************************************/
  //DOM-IGNORE-END
  
  
  #include "driver/spi/src/dynamic/drv_spi_internal.h"
  #include <stdbool.h>
  
  
  int32_t DRV_SPI_MasterRMSend8BitISR( struct DRV_SPI_DRIVER_OBJECT * pDrvInstance )
  {
      register SPI_MODULE_ID spiId = pDrvInstance->spiId;
      register DRV_SPI_JOB_OBJECT * currentJob = pDrvInstance->currentJob;
      /* Check to see if we have any more bytes to transmit */
      if (currentJob->dataLeftToTx + currentJob->dummyLeftToTx == 0)
      {
          /* We don't have any more data to send make sure the transmit interrupt is disabled */
          pDrvInstance->txEnabled = false;
          return 0;
      }
      /* Check to see if the transmit buffer is empty*/
      if (!PLIB_SPI_TransmitBufferIsEmpty(spiId))
      {
          return 0;
      }
      /* Make sure that we don't have something in progress and overrun the RX buffer */
      if (pDrvInstance->symbolsInProgress != 0)
      {
          return 0;
      }
      if (currentJob->dataLeftToTx != 0)
      {
      /* Transmit the data & update the counts */
          PLIB_SPI_BufferWrite(spiId, currentJob->txBuffer[currentJob->dataTxed]);
          currentJob->dataTxed++;
          currentJob->dataLeftToTx--;
      }
      else
      {
          /* Transmit the dummy data & update the counts */
          PLIB_SPI_BufferWrite(spiId, (uint8_t)pDrvInstance->dummyByteValue);
          currentJob->dummyLeftToTx--;
      }
      /* We now have a symbol in progress*/
      pDrvInstance->symbolsInProgress = 1;
  
      return 0;
  }
  
  int32_t DRV_SPI_MasterRMReceive8BitISR( struct DRV_SPI_DRIVER_OBJECT * pDrvInstance )
  {
      register SPI_MODULE_ID spiId = pDrvInstance->spiId;
      register DRV_SPI_JOB_OBJECT * currentJob = pDrvInstance->currentJob;
  
      if (currentJob == NULL)
      {
          return 0;
      }
      if (PLIB_SPI_ReceiverBufferIsFull(spiId))
      {
          /* We have data waiting in the SPI buffer */
          if (currentJob->dataLeftToRx != 0)
          {
              /* Receive the data and updates the count */
              currentJob->rxBuffer[currentJob->dataRxed] = PLIB_SPI_BufferRead(spiId);
              currentJob->dataRxed++;
              currentJob->dataLeftToRx --;
          }
          else
          {
              /* No Data but dummy data: Note: We cannot just clear the
                 buffer because we have to keep track of how many symbols/units we
                 have received, and the number may have increased since we checked
                 how full the buffer is.*/
              PLIB_SPI_BufferRead(spiId);
              //SYS_CONSOLE_MESSAGE("Rd ");
              currentJob->dummyLeftToRx--;
          }
          /* No longer have a symbol in progress */
          pDrvInstance->symbolsInProgress = 0;
      }
  
      return 0;
  }
  
  