mirror of https://gerrit.osmocom.org/simtrace2
664 lines
18 KiB
C
664 lines
18 KiB
C
/* ----------------------------------------------------------------------------
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* ATMEL Microcontroller Software Support
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* ----------------------------------------------------------------------------
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* Copyright (c) 2009, 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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/**
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* \file
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*
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* \section Purpose
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*
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* ISO 7816 driver
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*
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* \section Usage
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*
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* Explanation on the usage of the code made available through the header file.
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*/
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/*------------------------------------------------------------------------------
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* Headers
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*------------------------------------------------------------------------------*/
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#include "board.h"
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/*------------------------------------------------------------------------------
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* Definitions
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*------------------------------------------------------------------------------*/
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/** Case for APDU commands*/
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#define CASE1 1
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#define CASE2 2
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#define CASE3 3
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/** Flip flop for send and receive char */
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#define USART_SEND 0
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#define USART_RCV 1
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#if !defined(BOARD_ISO7816_BASE_USART)
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#define BOARD_ISO7816_BASE_USART USART1
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#define BOARD_ISO7816_ID_USART ID_USART1
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#endif
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/*-----------------------------------------------------------------------------
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* Internal variables
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*-----------------------------------------------------------------------------*/
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/** Variable for state of send and receive froom USART */
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static uint8_t StateUsartGlobal = USART_RCV;
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/** Pin reset master card */
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static Pin st_pinIso7816RstMC;
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/*----------------------------------------------------------------------------
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* Internal functions
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*----------------------------------------------------------------------------*/
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/**
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* Get a character from ISO7816
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* \param pCharToReceive Pointer for store the received char
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* \return 0: if timeout else status of US_CSR
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*/
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static uint32_t ISO7816_GetChar( uint8_t *pCharToReceive )
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{
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uint32_t status;
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uint32_t timeout=0;
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if( StateUsartGlobal == USART_SEND ) {
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while((BOARD_ISO7816_BASE_USART->US_CSR & US_CSR_TXEMPTY) == 0) {}
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BOARD_ISO7816_BASE_USART->US_CR = US_CR_RSTSTA | US_CR_RSTIT | US_CR_RSTNACK;
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StateUsartGlobal = USART_RCV;
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}
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/* Wait USART ready for reception */
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while( ((BOARD_ISO7816_BASE_USART->US_CSR & US_CSR_RXRDY) == 0) ) {
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if(timeout++ > 12000 * (BOARD_MCK/1000000)) {
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TRACE_DEBUG("TimeOut\n\r");
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return( 0 );
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}
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}
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TRACE_DEBUG("T: %u\n\r", timeout);
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/* At least one complete character has been received and US_RHR has not yet been read. */
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/* Get a char */
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*pCharToReceive = ((BOARD_ISO7816_BASE_USART->US_RHR) & 0xFF);
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status = (BOARD_ISO7816_BASE_USART->US_CSR&(US_CSR_OVRE|US_CSR_FRAME|
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US_CSR_PARE|US_CSR_TIMEOUT|US_CSR_NACK|
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(1<<10)));
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if (status != 0 ) {
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TRACE_DEBUG("R:0x%X\n\r", status);
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TRACE_DEBUG("R:0x%X\n\r", BOARD_ISO7816_BASE_USART->US_CSR);
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TRACE_DEBUG("Nb:0x%X\n\r", BOARD_ISO7816_BASE_USART->US_NER );
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BOARD_ISO7816_BASE_USART->US_CR = US_CR_RSTSTA;
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}
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/* Return status */
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return( status );
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}
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/**
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* Send a char to ISO7816
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* \param CharToSend char to be send
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* \return status of US_CSR
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*/
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static uint32_t ISO7816_SendChar( uint8_t CharToSend )
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{
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uint32_t status;
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TRACE_DEBUG("********** Send char: %c (0x%X)\n\r", CharToSend, CharToSend);
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if( StateUsartGlobal == USART_RCV ) {
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BOARD_ISO7816_BASE_USART->US_CR = US_CR_RSTSTA | US_CR_RSTIT | US_CR_RSTNACK;
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StateUsartGlobal = USART_SEND;
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}
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/* Wait USART ready for transmit */
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while((BOARD_ISO7816_BASE_USART->US_CSR & US_CSR_TXRDY) == 0) {}
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/* There is no character in the US_THR */
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/* Transmit a char */
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BOARD_ISO7816_BASE_USART->US_THR = CharToSend;
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status = (BOARD_ISO7816_BASE_USART->US_CSR&(US_CSR_OVRE|US_CSR_FRAME|
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US_CSR_PARE|US_CSR_TIMEOUT|US_CSR_NACK|
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(1<<10)));
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if (status != 0 ) {
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TRACE_DEBUG("******* status: 0x%X (Overrun: %d, NACK: %d, Timeout: %d, underrun: %d)\n\r",
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status, ((status & US_CSR_OVRE)>> 5), ((status & US_CSR_NACK) >> 13),
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((status & US_CSR_TIMEOUT) >> 8), ((status & (1 << 10)) >> 10));
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TRACE_DEBUG("E (USART CSR reg):0x%X\n\r", BOARD_ISO7816_BASE_USART->US_CSR);
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TRACE_DEBUG("Nb (Number of errors):0x%X\n\r", BOARD_ISO7816_BASE_USART->US_NER );
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BOARD_ISO7816_BASE_USART->US_CR = US_CR_RSTSTA;
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}
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/* Return status */
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return( status );
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}
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/**
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* Iso 7816 ICC power on
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*/
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static void ISO7816_IccPowerOn( void )
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{
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/* Set RESET Master Card */
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PIO_Set(&st_pinIso7816RstMC);
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}
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/*----------------------------------------------------------------------------
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* Exported functions
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*----------------------------------------------------------------------------*/
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/**
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* Iso 7816 ICC power off
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*/
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void ISO7816_IccPowerOff( void )
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{
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/* Clear RESET Master Card */
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PIO_Clear(&st_pinIso7816RstMC);
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}
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/**
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* Transfert Block TPDU T=0
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* \param pAPDU APDU buffer
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* \param pMessage Message buffer
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* \param wLength Block length
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* \return Message index
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*/
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uint16_t ISO7816_XfrBlockTPDU_T0(const uint8_t *pAPDU,
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uint8_t *pMessage,
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uint16_t wLength )
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{
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uint16_t NeNc;
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uint16_t indexApdu = 4;
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uint16_t indexMessage = 0;
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uint8_t SW1 = 0;
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uint8_t procByte;
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uint8_t cmdCase;
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TRACE_DEBUG("pAPDU[0]=0x%X\n\r",pAPDU[0]);
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TRACE_DEBUG("pAPDU[1]=0x%X\n\r",pAPDU[1]);
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TRACE_DEBUG("pAPDU[2]=0x%X\n\r",pAPDU[2]);
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TRACE_DEBUG("pAPDU[3]=0x%X\n\r",pAPDU[3]);
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TRACE_DEBUG("pAPDU[4]=0x%X\n\r",pAPDU[4]);
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TRACE_DEBUG("pAPDU[5]=0x%X\n\r",pAPDU[5]);
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TRACE_DEBUG("wlength=%d\n\r",wLength);
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ISO7816_SendChar( pAPDU[0] ); /* CLA */
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ISO7816_SendChar( pAPDU[1] ); /* INS */
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ISO7816_SendChar( pAPDU[2] ); /* P1 */
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ISO7816_SendChar( pAPDU[3] ); /* P2 */
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ISO7816_SendChar( pAPDU[4] ); /* P3 */
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/* Handle the four structures of command APDU */
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indexApdu = 4;
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if( wLength == 4 ) {
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cmdCase = CASE1;
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NeNc = 0;
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}
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else if( wLength == 5) {
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cmdCase = CASE2;
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NeNc = pAPDU[4]; /* C5 */
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if (NeNc == 0) {
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NeNc = 256;
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}
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}
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else if( wLength == 6) {
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NeNc = pAPDU[4]; /* C5 */
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cmdCase = CASE3;
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}
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else if( wLength == 7) {
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NeNc = pAPDU[4]; /* C5 */
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if( NeNc == 0 ) {
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cmdCase = CASE2;
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NeNc = (pAPDU[5]<<8)+pAPDU[6];
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}
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else {
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cmdCase = CASE3;
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}
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}
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else {
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NeNc = pAPDU[4]; /* C5 */
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if( NeNc == 0 ) {
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cmdCase = CASE3;
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NeNc = (pAPDU[5]<<8)+pAPDU[6];
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}
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else {
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cmdCase = CASE3;
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}
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}
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TRACE_DEBUG("CASE=0x%X NeNc=0x%X\n\r", cmdCase, NeNc);
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/* Handle Procedure Bytes */
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do {
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ISO7816_GetChar(&procByte);
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/* Handle NULL */
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if ( procByte == ISO_NULL_VAL ) {
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TRACE_DEBUG("INS\n\r");
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continue;
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}
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/* Handle SW1 */
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else if ( ((procByte & 0xF0) ==0x60) || ((procByte & 0xF0) ==0x90) ) {
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TRACE_DEBUG("SW1\n\r");
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SW1 = 1;
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}
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/* Handle INS */
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else if ( pAPDU[1] == procByte) {
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TRACE_DEBUG("HdlINS\n\r");
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if (cmdCase == CASE2) {
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/* receive data from card */
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do {
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ISO7816_GetChar(&pMessage[indexMessage++]);
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} while( 0 != --NeNc );
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}
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else {
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/* Send data */
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do {
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ISO7816_SendChar(pAPDU[indexApdu++]);
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} while( 0 != --NeNc );
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}
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}
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/* Handle INS ^ 0xff */
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else if ( pAPDU[1] == (procByte ^ 0xff)) {
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TRACE_DEBUG("HdlINS+\n\r");
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if (cmdCase == CASE2) {
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/* receive data from card */
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ISO7816_GetChar(&pMessage[indexMessage++]);
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}
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else {
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ISO7816_SendChar(pAPDU[indexApdu++]);
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}
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NeNc--;
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}
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else {
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/* ?? */
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TRACE_DEBUG("procByte=0x%X\n\r", procByte);
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break;
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}
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} while (NeNc != 0);
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/* Status Bytes */
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if (SW1 == 0) {
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ISO7816_GetChar(&pMessage[indexMessage++]); /* SW1 */
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}
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else {
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pMessage[indexMessage++] = procByte;
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}
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ISO7816_GetChar(&pMessage[indexMessage++]); /* SW2 */
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return( indexMessage );
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}
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/**
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* Escape ISO7816
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*/
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void ISO7816_Escape( void )
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{
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TRACE_DEBUG("For user, if needed\n\r");
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}
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/**
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* Restart clock ISO7816
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*/
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void ISO7816_RestartClock( void )
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{
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TRACE_DEBUG("ISO7816_RestartClock\n\r");
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BOARD_ISO7816_BASE_USART->US_BRGR = 13;
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}
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/**
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* Stop clock ISO7816
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*/
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void ISO7816_StopClock( void )
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{
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TRACE_DEBUG("ISO7816_StopClock\n\r");
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BOARD_ISO7816_BASE_USART->US_BRGR = 0;
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}
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/**
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* T0 APDU
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*/
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void ISO7816_toAPDU( void )
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{
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TRACE_DEBUG("ISO7816_toAPDU\n\r");
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TRACE_DEBUG("Not supported at this time\n\r");
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}
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/**
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* Answer To Reset (ATR)
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* \param pAtr ATR buffer
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* \param pLength Pointer for store the ATR length
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*/
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void ISO7816_Datablock_ATR( uint8_t* pAtr, uint8_t* pLength )
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{
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uint32_t i;
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uint32_t j;
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uint32_t y;
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*pLength = 0;
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/* Read ATR TS */
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ISO7816_GetChar(&pAtr[0]);
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/* Read ATR T0 */
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ISO7816_GetChar(&pAtr[1]);
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y = pAtr[1] & 0xF0;
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i = 2;
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/* Read ATR Ti */
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while (y) {
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if (y & 0x10) { /* TA[i] */
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ISO7816_GetChar(&pAtr[i++]);
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}
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if (y & 0x20) { /* TB[i] */
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ISO7816_GetChar(&pAtr[i++]);
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}
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if (y & 0x40) { /* TC[i] */
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ISO7816_GetChar(&pAtr[i++]);
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}
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if (y & 0x80) { /* TD[i] */
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ISO7816_GetChar(&pAtr[i]);
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y = pAtr[i++] & 0xF0;
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}
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else {
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y = 0;
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}
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}
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/* Historical Bytes */
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y = pAtr[1] & 0x0F;
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for( j=0; j < y; j++ ) {
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ISO7816_GetChar(&pAtr[i++]);
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}
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*pLength = i;
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}
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/**
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* Set data rate and clock frequency
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* \param dwClockFrequency ICC clock frequency in KHz.
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* \param dwDataRate ICC data rate in bpd
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*/
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void ISO7816_SetDataRateandClockFrequency( uint32_t dwClockFrequency, uint32_t dwDataRate )
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{
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uint8_t ClockFrequency;
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/* Define the baud rate divisor register */
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/* CD = MCK / SCK */
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/* SCK = FIDI x BAUD = 372 x 9600 */
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/* BOARD_MCK */
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/* CD = MCK/(FIDI x BAUD) = 48000000 / (372x9600) = 13 */
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BOARD_ISO7816_BASE_USART->US_BRGR = BOARD_MCK / (dwClockFrequency*1000);
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ClockFrequency = BOARD_MCK / BOARD_ISO7816_BASE_USART->US_BRGR;
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BOARD_ISO7816_BASE_USART->US_FIDI = (ClockFrequency)/dwDataRate;
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}
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/**
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* Pin status for ISO7816 RESET
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* \return 1 if the Pin RstMC is high; otherwise 0.
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*/
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uint8_t ISO7816_StatusReset( void )
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{
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return PIO_Get(&st_pinIso7816RstMC);
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}
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/**
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* cold reset
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*/
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void ISO7816_cold_reset( void )
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{
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volatile uint32_t i;
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/* tb: wait 400 cycles*/
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for( i=0; i<(120*(BOARD_MCK/1000000)); i++ ) {
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}
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BOARD_ISO7816_BASE_USART->US_RHR;
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BOARD_ISO7816_BASE_USART->US_CR = US_CR_RSTSTA | US_CR_RSTIT | US_CR_RSTNACK;
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ISO7816_IccPowerOn();
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}
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|
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/**
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* Warm reset
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*/
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void ISO7816_warm_reset( void )
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{
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volatile uint32_t i;
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|
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// Clears Reset
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ISO7816_IccPowerOff();
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/* tb: wait 400 cycles */
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for( i=0; i<(120*(BOARD_MCK/1000000)); i++ ) {
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}
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BOARD_ISO7816_BASE_USART->US_RHR;
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BOARD_ISO7816_BASE_USART->US_CR = US_CR_RSTSTA | US_CR_RSTIT | US_CR_RSTNACK;
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// Sets Reset
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ISO7816_IccPowerOn();
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}
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/**
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* Decode ATR trace
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* \param pAtr pointer on ATR buffer
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*/
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void ISO7816_Decode_ATR( uint8_t* pAtr )
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{
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uint32_t i;
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uint32_t j;
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uint32_t y;
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uint8_t offset;
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printf("\n\r");
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printf("ATR: Answer To Reset:\n\r");
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printf("TS = 0x%X Initial character ",pAtr[0]);
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if( pAtr[0] == 0x3B ) {
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printf("Direct Convention\n\r");
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}
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else {
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if( pAtr[0] == 0x3F ) {
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printf("Inverse Convention\n\r");
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}
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else {
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printf("BAD Convention\n\r");
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}
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}
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printf("T0 = 0x%X Format caracter\n\r",pAtr[1]);
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printf(" Number of historical bytes: K = %d\n\r", pAtr[1]&0x0F);
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printf(" Presence further interface byte:\n\r");
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if( pAtr[1]&0x80 ) {
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printf("TA ");
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}
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if( pAtr[1]&0x40 ) {
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printf("TB ");
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}
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if( pAtr[1]&0x20 ) {
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printf("TC ");
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}
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if( pAtr[1]&0x10 ) {
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printf("TD ");
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}
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if( pAtr[1] != 0 ) {
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printf(" present\n\r");
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}
|
|
|
|
i = 2;
|
|
y = pAtr[1] & 0xF0;
|
|
|
|
/* Read ATR Ti */
|
|
offset = 1;
|
|
while (y) {
|
|
|
|
if (y & 0x10) { /* TA[i] */
|
|
printf("TA[%d] = 0x%X ", offset, pAtr[i]);
|
|
if( offset == 1 ) {
|
|
printf("FI = %d ", (pAtr[i]>>8));
|
|
printf("DI = %d", (pAtr[i]&0x0F));
|
|
}
|
|
printf("\n\r");
|
|
i++;
|
|
}
|
|
if (y & 0x20) { /* TB[i] */
|
|
printf("TB[%d] = 0x%X\n\r", offset, pAtr[i]);
|
|
i++;
|
|
}
|
|
if (y & 0x40) { /* TC[i] */
|
|
printf("TC[%d] = 0x%X ", offset, pAtr[i]);
|
|
if( offset == 1 ) {
|
|
printf("Extra Guard Time: N = %d", pAtr[i]);
|
|
}
|
|
printf("\n\r");
|
|
i++;
|
|
}
|
|
if (y & 0x80) { /* TD[i] */
|
|
printf("TD[%d] = 0x%X\n\r", offset, pAtr[i]);
|
|
y = pAtr[i++] & 0xF0;
|
|
}
|
|
else {
|
|
y = 0;
|
|
}
|
|
offset++;
|
|
}
|
|
|
|
/* Historical Bytes */
|
|
printf("Historical bytes:\n\r");
|
|
y = pAtr[1] & 0x0F;
|
|
for( j=0; j < y; j++ ) {
|
|
printf(" 0x%X", pAtr[i]);
|
|
i++;
|
|
}
|
|
printf("\n\r\n\r");
|
|
|
|
}
|
|
|
|
/** Initializes a ISO driver
|
|
* \param pPinIso7816RstMC Pin ISO 7816 Rst MC
|
|
*/
|
|
void ISO7816_Init( const Pin pPinIso7816RstMC )
|
|
{
|
|
TRACE_DEBUG("ISO_Init\n\r");
|
|
|
|
/* Pin ISO7816 initialize */
|
|
st_pinIso7816RstMC = pPinIso7816RstMC;
|
|
|
|
#if 0
|
|
//FIXME: Why don't I nedd to pass baudrate and masterclock to USART_Configure? Because Masterclock is configured as ref clk signal anyways?
|
|
/**
|
|
* \brief Configures an USART peripheral with the specified parameters.
|
|
*
|
|
*
|
|
* \param usart Pointer to the USART peripheral to configure.
|
|
* \param mode Desired value for the USART mode register (see the datasheet).
|
|
* \param baudrate Baudrate at which the USART should operate (in Hz).
|
|
* \param masterClock Frequency of the system master clock (in Hz).
|
|
*/
|
|
void USART_Configure(Usart *usart,
|
|
uint32_t mode,
|
|
uint32_t baudrate,
|
|
uint32_t masterClock)
|
|
{
|
|
/* Reset and disable receiver & transmitter*/
|
|
usart->US_CR = US_CR_RSTRX | US_CR_RSTTX
|
|
| US_CR_RXDIS | US_CR_TXDIS;
|
|
|
|
/* Configure mode*/
|
|
usart->US_MR = mode;
|
|
|
|
/* Configure baudrate*/
|
|
/* Asynchronous, no oversampling*/
|
|
if ( ((mode & US_MR_SYNC) == 0) && ((mode & US_MR_OVER) == 0) )
|
|
{
|
|
usart->US_BRGR = (masterClock / baudrate) / 16;
|
|
}
|
|
|
|
if( ((mode & US_MR_USART_MODE_SPI_MASTER) == US_MR_USART_MODE_SPI_MASTER)
|
|
|| ((mode & US_MR_SYNC) == US_MR_SYNC))
|
|
{
|
|
if( (mode & US_MR_USCLKS_Msk) == US_MR_USCLKS_MCK)
|
|
{
|
|
usart->US_BRGR = masterClock / baudrate;
|
|
}
|
|
else
|
|
{
|
|
if ( (mode & US_MR_USCLKS_DIV) == US_MR_USCLKS_DIV)
|
|
{
|
|
usart->US_BRGR = masterClock / baudrate / 8;
|
|
}
|
|
}
|
|
}
|
|
/* TODO other modes*/
|
|
}
|
|
#endif
|
|
USART_Configure( BOARD_ISO7816_BASE_USART,
|
|
US_MR_USART_MODE_IS07816_T_0
|
|
| US_MR_USCLKS_MCK
|
|
| US_MR_NBSTOP_1_BIT
|
|
| US_MR_PAR_EVEN
|
|
| US_MR_CHRL_8_BIT
|
|
| US_MR_CLKO
|
|
| (3<<24), /* MAX_ITERATION */
|
|
1,
|
|
0);
|
|
|
|
/* Configure USART */
|
|
PMC_EnablePeripheral(BOARD_ISO7816_ID_USART);
|
|
/* Disable interrupts */
|
|
BOARD_ISO7816_BASE_USART->US_IDR = (uint32_t) -1;
|
|
|
|
BOARD_ISO7816_BASE_USART->US_FIDI = 372; /* by default */
|
|
/* Define the baud rate divisor register */
|
|
/* CD = MCK / SCK */
|
|
/* SCK = FIDI x BAUD = 372 x 9600 */
|
|
/* BOARD_MCK */
|
|
/* CD = MCK/(FIDI x BAUD) = 48000000 / (372x9600) = 13 */
|
|
BOARD_ISO7816_BASE_USART->US_BRGR = BOARD_MCK / (372*9600);
|
|
|
|
/* Write the Timeguard Register */
|
|
BOARD_ISO7816_BASE_USART->US_TTGR = 5;
|
|
|
|
USART_SetTransmitterEnabled(BOARD_ISO7816_BASE_USART, 1);
|
|
USART_SetReceiverEnabled(BOARD_ISO7816_BASE_USART, 1);
|
|
|
|
}
|
|
|