mirror of
https://gitea.osmocom.org/sim-card/simtrace2.git
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3f5e3ddffc
This way we can easily check with 'diff' for differences in our code and Atmel softpack. Also, this layout is more suitable for building various different firmware images (e.g. factory-test, dfu-loader, main application) for a variety of different boards (simtrace, owhw, qmod).
284 lines
10 KiB
C
284 lines
10 KiB
C
/* ----------------------------------------------------------------------------
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* ATMEL Microcontroller Software Support
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* ----------------------------------------------------------------------------
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* Copyright (c) 2010, Atmel Corporation
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*
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* - Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the disclaimer below.
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*
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* Atmel's name may not be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
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* DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
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* OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
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* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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* ----------------------------------------------------------------------------
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*/
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/** \addtogroup pio_capture_module Working with PIO Parallel Capture Mode
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* The PIO Parallel Capture Mode driver provides the interface to configure and use the
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* PIO Parallel Capture Mode peripheral.\n
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*
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* The PIO Controller integrates an interface able to read data from a CMOS digital
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* image sensor, a high-speed parallel ADC, a DSP synchronous port in synchronous
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* mode, etc.... For better understanding and to ease reading, the following
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* description uses an example with a CMOS digital image sensor
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*
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* To use the PIO Parallel Capture, the user has to follow these few steps:
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* <ul>
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* <li> Enable PIOA peripheral clock </li>
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* <li> Configure the PDC </li>
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* <li> Configure the PIO Capture interrupt </li>
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* <li> Enable the PDC </li>
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* <li> Enable the PIO Capture </li>
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* <li> Wait for interrupt </li>
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* <li> Disable the interrupt </li>
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* <li> Read the DATA </li>
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* </ul>
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*
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* For more accurate information, please look at the PIO Parallel Capture Mode section of the
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* Datasheet.
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*
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* Related files :\n
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* \ref pio_capture.c\n
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* \ref pio_capture.h\n
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*/
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/*@{*/
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/*@}*/
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/**
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* \file
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*
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* Implementation of PIO Parallel Capture.
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*
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*/
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/*----------------------------------------------------------------------------
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* Headers
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*----------------------------------------------------------------------------*/
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#include "chip.h"
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#include <assert.h>
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/*----------------------------------------------------------------------------
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* Local Functions
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*----------------------------------------------------------------------------*/
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/** Copy the API structure for interrupt handler */
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static SpioCaptureInit* _PioCaptureCopy;
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/*----------------------------------------------------------------------------
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* Global Functions
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*----------------------------------------------------------------------------*/
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/*----------------------------------------------------------------------------*/
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/**
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* \brief The PIO_CaptureHandler must be called by the PIO Capture Interrupt
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* Service Routine with the corresponding PIO Capture instance.
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*/
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/*----------------------------------------------------------------------------*/
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extern void PIO_CaptureHandler( void )
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{
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volatile uint32_t pio_captureSr;
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/* Read the status register*/
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pio_captureSr = PIOA->PIO_PCISR ;
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pio_captureSr &= PIOA->PIO_PCIMR ;
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if (pio_captureSr & PIO_PCISR_DRDY)
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{
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/* Parallel Capture Mode Data Ready */
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if ( _PioCaptureCopy->CbkDataReady != NULL )
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{
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_PioCaptureCopy->CbkDataReady( _PioCaptureCopy );
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}
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else
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{
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TRACE_DEBUG("IT PIO Capture Data Ready received (no callback)\n\r");
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}
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}
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if (pio_captureSr & PIO_PCISR_OVRE)
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{
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/* Parallel Capture Mode Overrun Error */
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if ( _PioCaptureCopy->CbkOverrun != NULL )
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{
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_PioCaptureCopy->CbkOverrun( _PioCaptureCopy );
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}
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else
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{
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TRACE_DEBUG("IT PIO Capture Overrun Error received (no callback)\n\r");
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}
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}
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if (pio_captureSr & PIO_PCISR_RXBUFF)
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{
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/* Reception Buffer Full */
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if ( _PioCaptureCopy->CbkBuffFull != NULL )
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{
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_PioCaptureCopy->CbkBuffFull( _PioCaptureCopy );
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}
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else
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{
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TRACE_DEBUG("IT PIO Capture Reception Buffer Full received (no callback)\n\r");
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}
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}
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if (pio_captureSr & PIO_PCISR_ENDRX)
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{
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/* End of Reception Transfer */
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if ( _PioCaptureCopy->CbkEndReception != NULL )
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{
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_PioCaptureCopy->CbkEndReception( _PioCaptureCopy );
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}
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else
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{
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TRACE_DEBUG("IT PIO Capture End of Reception Transfer received (no callback)\n\r");
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}
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}
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}
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/*----------------------------------------------------------------------------*/
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/**
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* \brief Disable Interupt of the PIO Capture
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* \param itToDisable : Interrupt to disable
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*/
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/*----------------------------------------------------------------------------*/
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void PIO_CaptureDisableIt( uint32_t itToDisable )
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{
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/* Parallel capture mode is enabled */
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PIOA->PIO_PCIDR = itToDisable;
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}
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/*----------------------------------------------------------------------------*/
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/**
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* \brief Enable Interupt of the PIO Capture
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* \param itToEnable : Interrupt to enable
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*/
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/*----------------------------------------------------------------------------*/
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void PIO_CaptureEnableIt( uint32_t itToEnable )
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{
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/* Parallel capture mode is enabled */
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PIOA->PIO_PCIER = itToEnable;
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}
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/*----------------------------------------------------------------------------*/
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/**
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* \brief Enable the PIO Capture
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*/
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/*----------------------------------------------------------------------------*/
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void PIO_CaptureEnable( void )
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{
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/* PDC: Receive Pointer Register */
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PIOA->PIO_RPR = (uint32_t)_PioCaptureCopy->pData ;
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/* PDC: Receive Counter Register */
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/* Starts peripheral data transfer if corresponding channel is active */
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PIOA->PIO_RCR = PIO_RCR_RXCTR(_PioCaptureCopy->dPDCsize) ;
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/* Parallel capture mode is enabled */
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PIOA->PIO_PCMR |= PIO_PCMR_PCEN ;
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}
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/*----------------------------------------------------------------------------*/
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/**
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* \brief Disable the PIO Capture
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*/
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/*----------------------------------------------------------------------------*/
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void PIO_CaptureDisable( void )
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{
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/* Parallel capture mode is disabled */
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PIOA->PIO_PCMR &= (uint32_t)(~PIO_PCMR_PCEN) ;
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}
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/*----------------------------------------------------------------------------*/
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/**
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* \brief Initialize the PIO Capture
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* Be careful to configure the PDC before enable interrupt on pio capture.
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* Otherway, the pdc will go in interrupt handler continuously.
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* \param dsize :
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* 0 = The reception data in the PIO_PCRHR register is a BYTE (8-bit).
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* 1 = The reception data in the PIO_PCRHR register is a HALF-WORD (16-bit).
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* 2/3 = The reception data in the PIO_PCRHR register is a WORD (32-bit).
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* \param alwaysSampling: ALWYS: Parallel Capture Mode Always Sampling
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* 0 = The parallel capture mode samples the data when both data enables are active.
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* 1 = The parallel capture mode samples the data whatever the data enables are.
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* \param halfSampling: HALFS: Parallel Capture Mode Half Sampling
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* 0 = The parallel capture mode samples all the data.
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* 1 = The parallel capture mode samples the data only one time out of two.
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* \param modeFirstSample: FRSTS: Parallel Capture Mode First Sample
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* This bit is useful only if the HALFS bit is set to 1. If data are numbered
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* in the order that they are received with an index from 0 to n:
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* 0 = Only data with an even index are sampled.
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* 1 = Only data with an odd index are sampled.
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*/
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/*----------------------------------------------------------------------------*/
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void PIO_CaptureInit( SpioCaptureInit *pInit )
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{
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PMC_EnablePeripheral( ID_PIOA );
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assert( (pInit->dsize < 0x4) ) ;
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assert( (pInit->dPDCsize <= PIO_RPR_RXPTR_Msk) ) ;
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assert( (pInit->alwaysSampling < 2) );
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assert( (pInit->halfSampling < 2) );
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assert( (pInit->modeFirstSample < 2) );
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/* PDC: Transfer Control Register */
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/* Disables the PDC transmitter channel requests */
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PIOA->PIO_PTCR = PIO_PTCR_RXTDIS;
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/* PDC: Receive Pointer Register */
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PIOA->PIO_RPR = (uint32_t)pInit->pData;
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/* PDC: Receive Counter Register */
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/* Starts peripheral data transfer if corresponding channel is active */
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PIOA->PIO_RCR = PIO_RCR_RXCTR(pInit->dPDCsize);
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/* PDC: Transfer Control Register */
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/* Enables PDC receiver channel requests if RXTDIS is not set */
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PIOA->PIO_PTCR = PIO_PTCR_RXTEN ;
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/* Copy the API structure for interrupt handler */
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_PioCaptureCopy = pInit;
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/* PIO Parallel Capture Mode */
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PIOA->PIO_PCMR = PIO_PCMR_DSIZE(pInit->dsize)
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| ((pInit->alwaysSampling<<9) & PIO_PCMR_ALWYS)
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| ((pInit->halfSampling<<10) & PIO_PCMR_HALFS)
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| ((pInit->modeFirstSample<<11) & PIO_PCMR_FRSTS);
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if ( pInit->CbkDataReady != NULL )
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{
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PIOA->PIO_PCIER = PIO_PCISR_DRDY;
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}
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if ( pInit->CbkOverrun != NULL )
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{
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PIOA->PIO_PCIER = PIO_PCISR_OVRE;
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}
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if ( pInit->CbkEndReception != NULL )
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{
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PIOA->PIO_PCIER = PIO_PCISR_ENDRX;
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}
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if ( pInit->CbkBuffFull != NULL )
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{
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PIOA->PIO_PCIER = PIO_PCISR_RXBUFF;
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}
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// else
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// {
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// TRACE_INFO("No interruption, no callback\n\r");
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// }
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}
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