-/*******************************************************************
- Copyright (C) 2009 FreakLabs
- All rights reserved.
-
- Redistribution and use in source and binary forms, with or without
- modification, are permitted provided that the following conditions
- are met:
-
- 1. Redistributions of source code must retain the above copyright
- notice, this list of conditions and the following disclaimer.
- 2. Redistributions in binary form must reproduce the above copyright
- notice, this list of conditions and the following disclaimer in the
- documentation and/or other materials provided with the distribution.
- 3. Neither the name of the the copyright holder nor the names of its contributors
- may be used to endorse or promote products derived from this software
- without specific prior written permission.
-
- THIS SOFTWARE IS PROVIDED BY THE THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS'' AND
- ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
- FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- SUCH DAMAGE.
-
- Originally written by Christopher Wang aka Akiba.
- Please post support questions to the FreakLabs forum.
-
-*******************************************************************/
-/*!
- \file
- \ingroup
-
-
-*/
-/**************************************************************************/
-#include "chb.h"
-#include "chb_spi.h"
-#include "core/ssp/ssp.h"
-
-/**************************************************************************/
-/*!
-
-*/
-/**************************************************************************/
-void chb_spi_init()
-{
- // initialise spi, high between frames and transition on trailing edge
- sspInit(0, sspClockPolarity_High, sspClockPhase_FallingEdge);
-
- // set the slave select to idle
- CHB_SPI_DISABLE();
-}
-
-/**************************************************************************/
-/*!
- This function both reads and writes data. For write operations, include data
- to be written as argument. For read ops, use dummy data as arg. Returned
- data is read byte val.
-*/
-/**************************************************************************/
-U8 chb_xfer_byte(U8 data)
-{
- /* Move on only if NOT busy and TX FIFO not full */
- while ((SSP_SSP0SR & (SSP_SSP0SR_TNF_MASK | SSP_SSP0SR_BSY_MASK)) != SSP_SSP0SR_TNF_NOTFULL);
- SSP_SSP0DR = data;
-
- /* Wait until the busy bit is cleared and receive buffer is not empty */
- while ((SSP_SSP0SR & (SSP_SSP0SR_BSY_MASK | SSP_SSP0SR_RNE_MASK)) != SSP_SSP0SR_RNE_NOTEMPTY);
-
- // Read the queue
- return SSP_SSP0DR;
-}