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/***************************************************************
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*
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* OpenBeacon.org - main entry for 2.4GHz RFID USB reader
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*
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* Copyright 2007 Milosch Meriac <meriac@openbeacon.de>
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*
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* basically starts the USB task, initializes all IO ports
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* and introduces idle application hook to handle the HF traffic
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* from the nRF24L01 chip
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*
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***************************************************************
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; version 2.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along
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with this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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/* Library includes. */
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#include <string.h>
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#include <stdio.h>
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#include <FreeRTOS.h>
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#include <AT91SAM7.h>
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#include <lib_AT91SAM7.h>
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#include <USB-CDC.h>
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#include <task.h>
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#include "openpicc.h"
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#include "board.h"
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#include "led.h"
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#include "env.h"
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#include "cmd.h"
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#include "da.h"
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#include "adc.h"
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#include "pll.h"
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#include "pio_irq.h"
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#include "tc_cdiv.h"
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#include "tc_cdiv_sync.h"
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#include "tc_fdt.h"
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#include "usb_print.h"
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#include "iso14443_layer3a.h"
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#include "iso14443_sniffer.h"
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#include "iso14443a_pretender.h"
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#include "decoder.h"
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#include "tc_sniffer.h"
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#include "performance.h"
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static inline int detect_board(void)
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{
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/* OpenPICC board detection logic.
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* Interesting board differences: PA31 is open on OPENPICC_v0_4 and connected
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* to PA18 on OPENPICC_v0_4_p1. PA18 is connected to U7 on both and might read
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* differently depending on the state of U7 (primarily depending on U5 and the
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* receive circuitry).
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* Strategy: Enable Pullups, read PA31 and PA18, if both read low then U7 is
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* switched through and this is an v0.4p1. If PA18 reads low and PA31 reads high
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* then U7 is switched through and this is an v0.4. If both read high, then U7 is
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* not switched through and it might be either board. In this case drive PA31 down
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* and see whether PA18 follows down, then it's a v0.4p1 otherwise a v0.4.
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*/
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int result = -1;
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AT91PS_PIO pio = AT91C_BASE_PIOA;
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u_int32_t old_OSR = pio->PIO_OSR,
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old_ODSR = pio->PIO_ODSR,
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old_PUSR = pio->PIO_PPUSR,
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old_PSR = pio->PIO_PSR;
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pio->PIO_ODR = AT91C_PIO_PA18 | AT91C_PIO_PA31;
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pio->PIO_PER = AT91C_PIO_PA18 | AT91C_PIO_PA31;
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pio->PIO_PPUER = AT91C_PIO_PA18 | AT91C_PIO_PA31;
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unsigned int pa18 = AT91F_PIO_IsInputSet(pio, AT91C_PIO_PA18),
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pa31 = AT91F_PIO_IsInputSet(pio, AT91C_PIO_PA31);
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if(!pa18 && !pa31) {
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//vLedInit();
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//vLedHaltBlinking(1);
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result = OPENPICC_v0_4_karsten;
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} else if(!pa18 && pa31) {
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vLedInit();
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vLedHaltBlinking(2);
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// Needs to be tested, should be v0.4
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} else if(pa18 && pa31) {
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// Can be either board
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pio->PIO_OER = AT91C_PIO_PA31;
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pio->PIO_CODR = AT91C_PIO_PA31;
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pa18 = AT91F_PIO_IsInputSet(pio, AT91C_PIO_PA18);
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if(!pa18) {
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result = OPENPICC_v0_4_karsten;
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} else {
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vLedInit();
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vLedHaltBlinking(3);
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// Needs to be tested, should be v0.4
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}
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// Restore state
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if( old_OSR & AT91C_PIO_PA31 ) {
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pio->PIO_OER = AT91C_PIO_PA31;
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if(old_ODSR & AT91C_PIO_PA31) {
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pio->PIO_SODR = AT91C_PIO_PA31;
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} else {
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pio->PIO_CODR = AT91C_PIO_PA31;
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}
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} else {
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pio->PIO_ODR = AT91C_PIO_PA31;
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}
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}
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// Restore state
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if(old_PSR & AT91C_PIO_PA18) pio->PIO_PER = AT91C_PIO_PA18; else pio->PIO_PDR = AT91C_PIO_PA18;
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if(old_PSR & AT91C_PIO_PA31) pio->PIO_PER = AT91C_PIO_PA31; else pio->PIO_PDR = AT91C_PIO_PA31;
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if(old_PUSR & AT91C_PIO_PA18) pio->PIO_PPUDR = AT91C_PIO_PA18; else pio->PIO_PPUER = AT91C_PIO_PA18;
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if(old_PUSR & AT91C_PIO_PA31) pio->PIO_PPUDR = AT91C_PIO_PA31; else pio->PIO_PPUER = AT91C_PIO_PA31;
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return result;
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}
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/**********************************************************************/
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static inline void prvSetupHardware (void)
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{
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/* The very, very first thing we do is setup the global OPENPICC variable to point to
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* the correct hardware information.
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*/
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int release = detect_board();
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if(release < 0) {
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vLedInit();
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vLedHaltBlinking(0);
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}
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OPENPICC = &OPENPICC_HARDWARE[release];
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/* When using the JTAG debugger the hardware is not always initialised to
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the correct default state. This line just ensures that this does not
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cause all interrupts to be masked at the start. */
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AT91C_BASE_AIC->AIC_EOICR = 0;
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/* Enable the peripheral clock. */
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AT91C_BASE_PMC->PMC_PCER = 1 << AT91C_ID_PIOA;
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AT91C_BASE_PMC->PMC_PCER = 1 << AT91C_ID_PIOB;
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/* initialize environment variables */
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env_init();
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if(!env_load())
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{
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env.e.mode=0;
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env.e.reader_id=255;
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env_store();
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}
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}
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/**********************************************************************/
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void vApplicationIdleHook(void)
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{
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static char disabled_green = 0;
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//static int i=0;
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//vLedSetGreen(i^=1);
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if(!disabled_green) {
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//vLedSetGreen(0);
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disabled_green = 1;
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}
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}
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/* This task pings the watchdog even when the idle task is not running
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* It should be started with a very high priority and will delay most of the time */
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void vMainWatchdogPinger (void *pvParameters)
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{
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(void)pvParameters;
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while(1) {
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/* Restart watchdog, has been enabled in Cstartup_SAM7.c */
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AT91F_WDTRestart(AT91C_BASE_WDTC);
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vTaskDelay(500*portTICK_RATE_MS);
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}
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}
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void usb_print_flusher (void *pvParameters)
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{
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(void)pvParameters;
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while(1) {
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usb_print_flush();
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vTaskDelay(100*portTICK_RATE_MS);
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}
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}
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/**********************************************************************/
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int main (void)
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{
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prvSetupHardware ();
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usb_print_init();
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decoder_init();
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performance_init();
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pio_irq_init();
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vLedInit();
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da_init();
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adc_init();
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xTaskCreate (usb_print_flusher, (signed portCHAR *) "PRINT-FLUSH", TASK_USB_STACK,
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NULL, TASK_USB_PRIORITY, NULL);
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/*xTaskCreate (iso14443_layer3a_state_machine, (signed portCHAR *) "ISO14443A-3", TASK_ISO_STACK,
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NULL, TASK_ISO_PRIORITY, NULL);*/
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/*xTaskCreate (iso14443_sniffer, (signed portCHAR *) "ISO14443-SNIFF", TASK_ISO_STACK,
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NULL, TASK_ISO_PRIORITY, NULL);*/
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xTaskCreate (iso14443a_pretender, (signed portCHAR *) "ISO14443A-PRETEND", TASK_ISO_STACK,
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NULL, TASK_ISO_PRIORITY, NULL);
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/*xTaskCreate (tc_sniffer, (signed portCHAR *) "RFID-SNIFFER", TASK_ISO_STACK,
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NULL, TASK_ISO_PRIORITY, NULL);*/
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xTaskCreate (vUSBCDCTask, (signed portCHAR *) "USB", TASK_USB_STACK,
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NULL, TASK_USB_PRIORITY, NULL);
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vCmdInit();
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xTaskCreate (vMainWatchdogPinger, (signed portCHAR *) "WDT PINGER", 64,
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NULL, TASK_ISO_PRIORITY -1, NULL);
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//vLedSetGreen(1);
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/* Remap RAM to addr 0 */
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AT91C_BASE_MC->MC_RCR = AT91C_MC_RCB;
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vTaskStartScheduler ();
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return 0;
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}
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