mirror of
https://gitea.osmocom.org/sim-card/simtrace2.git
synced 2026-03-16 21:28:33 +03:00
4ba4d2230b
It is possible to use sniffer.py to sniff the phone-simcard-communication. To be fixed: The buffer size read is fixed and the data is only send over USB if the buffer max length is reached. which means we don not get the last bytes of the transaction. This should be changed in one of the next commits. Maybe the former simtrace code can give some inspiration on this topic.
154 lines
6.2 KiB
C
154 lines
6.2 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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* Headers
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*------------------------------------------------------------------------------*/
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#include "board.h"
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#include <string.h>
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extern uint8_t rcvdChar;
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extern uint32_t char_stat;
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//#define BUFLEN 14
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// FIXME: Remove:
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#define PR TRACE_DEBUG
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//#define PR printf
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/*typedef struct ring_buffer
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{
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uint8_t buf[BUFLEN*2]; // data buffer
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uint8_t idx; // number of items in the buffer
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} ring_buffer;
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*/
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ring_buffer buf = { {0}, 0 };
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void buf_push(uint8_t item)
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{
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buf.buf[buf.idx % (BUFLEN*2)] = item;
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PR("----- Push: %x %x\n\r", buf.idx, buf.buf[buf.idx]);
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buf.idx = (buf.idx+1) % (BUFLEN*2);
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}
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uint8_t get_buf_start(uint8_t *buf_start)
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{
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*buf_start = &(buf.buf[buf.idx]);
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return 2*BUFLEN-buf.idx;
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}
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/** Initializes a ISO driver
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*/
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// FIXME: This function is implemented in iso7816_4.c !! Only MCK instead of SCK is always taken. Change that!
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void _ISO7816_Init( void )
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{
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printf("ISO_Init\n\r");
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TRACE_DEBUG("ISO_Init\n\r");
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USART_Configure( USART_PHONE,
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US_MR_USART_MODE_IS07816_T_0
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// Nope, we aren't master:
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// | US_MR_USCLKS_MCK
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| US_MR_USCLKS_SCK
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| US_MR_NBSTOP_1_BIT
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| US_MR_PAR_EVEN
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| US_MR_CHRL_8_BIT
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| US_MR_CLKO /** TODO: This field was set in the original simtrace firmware..why? */
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| (3<<24), /* MAX_ITERATION */
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1,
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0);
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/*
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SYNC = 0 (async mode)
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OVER = 0 (oversampling by 8?)
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FIDI = 372 (default val on startup before other value is negotiated)
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USCLKS = 3 (Select SCK as input clock) --> US_MR_USCLKS_SCK
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CD = 1 ? --> US_BRGR_CD(1)
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*/
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USART_PHONE->US_FIDI = 372;
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// USART_PHONE->US_IDR = (uint32_t) -1;
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USART_PHONE->US_BRGR = US_BRGR_CD(1);
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// USART_PHONE->US_BRGR = BOARD_MCK / (372*9600);
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USART_PHONE->US_TTGR = 5;
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/* Configure USART */
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PMC_EnablePeripheral(ID_USART_PHONE);
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USART1->US_IDR = 0xffffffff;
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USART_EnableIt( USART1, US_IER_RXRDY) ;
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/* enable USART1 interrupt */
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NVIC_EnableIRQ( USART1_IRQn ) ;
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// USART_PHONE->US_IER = US_IER_RXRDY | US_IER_OVRE | US_IER_FRAME | US_IER_PARE | US_IER_NACK | US_IER_ITER;
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}
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/*
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* Initializes rcvdChar with the char received on USART interface
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* char_stat is zero if no error occured.
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* Otherwise it is filled with the content of the status register.
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*/
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void USART1_IrqHandler( void )
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{
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uint32_t stat;
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char_stat = 0;
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// Rcv buf full
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/* if((stat & US_CSR_RXBUFF) == US_CSR_RXBUFF) {
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TRACE_DEBUG("Rcv buf full");
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USART_DisableIt(USART1, US_IDR_RXBUFF);
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}
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*/
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uint32_t csr = USART_PHONE->US_CSR;
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PR("---- stat: %x\n\r", csr);
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if (csr & US_CSR_TXRDY) {
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/* transmit buffer empty, nothing to transmit */
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}
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if (csr & US_CSR_RXRDY) {
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stat = (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 (stat == 0 ) {
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/* Fill char into buffer */
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PR("---- BUFLEN %x\n\r", buf.idx);
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buf_push((USART_PHONE->US_RHR) & 0xFF);
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} else {
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// buf_push((USART_PHONE->US_RHR) & 0xFF);
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PR("%x\n\r", (USART_PHONE->US_RHR) & 0xFF);
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} /* else: error occured */
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if ((buf.idx % BUFLEN) == 0) {
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rcvdChar = 1;
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}
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char_stat = stat;
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}
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}
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