mirror of
https://github.com/RfidResearchGroup/proxmark3.git
synced 2024-12-29 11:52:59 +08:00
312 lines
7.6 KiB
C
312 lines
7.6 KiB
C
//-----------------------------------------------------------------------------
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// Jonathan Westhues, Sept 2005
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//
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// This code is licensed to you under the terms of the GNU GPL, version 2 or,
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// at your option, any later version. See the LICENSE.txt file for the text of
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// the license.
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//-----------------------------------------------------------------------------
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// Utility functions used in many places, not specific to any piece of code.
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//-----------------------------------------------------------------------------
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#include "proxmark3.h"
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#include "util.h"
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#include "string.h"
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uint32_t SwapBits(uint32_t value, int nrbits) {
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int i;
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uint32_t newvalue = 0;
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for(i = 0; i < nrbits; i++) {
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newvalue ^= ((value >> i) & 1) << (nrbits - 1 - i);
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}
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return newvalue;
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}
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void num_to_bytes(uint64_t n, size_t len, uint8_t* dest)
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{
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while (len--) {
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dest[len] = (uint8_t) n;
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n >>= 8;
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}
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}
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uint64_t bytes_to_num(uint8_t* src, size_t len)
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{
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uint64_t num = 0;
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while (len--)
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{
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num = (num << 8) | (*src);
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src++;
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}
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return num;
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}
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void LEDsoff()
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{
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LED_A_OFF();
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LED_B_OFF();
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LED_C_OFF();
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LED_D_OFF();
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}
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// LEDs: R(C) O(A) G(B) -- R(D) [1, 2, 4 and 8]
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void LED(int led, int ms)
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{
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if (led & LED_RED)
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LED_C_ON();
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if (led & LED_ORANGE)
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LED_A_ON();
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if (led & LED_GREEN)
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LED_B_ON();
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if (led & LED_RED2)
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LED_D_ON();
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if (!ms)
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return;
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SpinDelay(ms);
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if (led & LED_RED)
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LED_C_OFF();
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if (led & LED_ORANGE)
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LED_A_OFF();
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if (led & LED_GREEN)
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LED_B_OFF();
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if (led & LED_RED2)
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LED_D_OFF();
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}
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// Determine if a button is double clicked, single clicked,
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// not clicked, or held down (for ms || 1sec)
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// In general, don't use this function unless you expect a
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// double click, otherwise it will waste 500ms -- use BUTTON_HELD instead
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int BUTTON_CLICKED(int ms)
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{
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// Up to 500ms in between clicks to mean a double click
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int ticks = (48000 * (ms ? ms : 1000)) >> 10;
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// If we're not even pressed, forget about it!
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if (!BUTTON_PRESS())
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return BUTTON_NO_CLICK;
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// Borrow a PWM unit for my real-time clock
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AT91C_BASE_PWMC->PWMC_ENA = PWM_CHANNEL(0);
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// 48 MHz / 1024 gives 46.875 kHz
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AT91C_BASE_PWMC_CH0->PWMC_CMR = PWM_CH_MODE_PRESCALER(10);
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AT91C_BASE_PWMC_CH0->PWMC_CDTYR = 0;
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AT91C_BASE_PWMC_CH0->PWMC_CPRDR = 0xffff;
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uint16_t start = AT91C_BASE_PWMC_CH0->PWMC_CCNTR;
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int letoff = 0;
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for(;;)
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{
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uint16_t now = AT91C_BASE_PWMC_CH0->PWMC_CCNTR;
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// We haven't let off the button yet
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if (!letoff)
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{
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// We just let it off!
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if (!BUTTON_PRESS())
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{
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letoff = 1;
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// reset our timer for 500ms
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start = AT91C_BASE_PWMC_CH0->PWMC_CCNTR;
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ticks = (48000 * (500)) >> 10;
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}
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// Still haven't let it off
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else
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// Have we held down a full second?
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if (now == (uint16_t)(start + ticks))
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return BUTTON_HOLD;
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}
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// We already let off, did we click again?
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else
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// Sweet, double click!
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if (BUTTON_PRESS())
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return BUTTON_DOUBLE_CLICK;
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// Have we ran out of time to double click?
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else
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if (now == (uint16_t)(start + ticks))
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// At least we did a single click
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return BUTTON_SINGLE_CLICK;
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WDT_HIT();
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}
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// We should never get here
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return BUTTON_ERROR;
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}
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// Determine if a button is held down
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int BUTTON_HELD(int ms)
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{
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// If button is held for one second
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int ticks = (48000 * (ms ? ms : 1000)) >> 10;
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// If we're not even pressed, forget about it!
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if (!BUTTON_PRESS())
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return BUTTON_NO_CLICK;
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// Borrow a PWM unit for my real-time clock
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AT91C_BASE_PWMC->PWMC_ENA = PWM_CHANNEL(0);
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// 48 MHz / 1024 gives 46.875 kHz
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AT91C_BASE_PWMC_CH0->PWMC_CMR = PWM_CH_MODE_PRESCALER(10);
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AT91C_BASE_PWMC_CH0->PWMC_CDTYR = 0;
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AT91C_BASE_PWMC_CH0->PWMC_CPRDR = 0xffff;
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uint16_t start = AT91C_BASE_PWMC_CH0->PWMC_CCNTR;
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for(;;)
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{
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uint16_t now = AT91C_BASE_PWMC_CH0->PWMC_CCNTR;
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// As soon as our button let go, we didn't hold long enough
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if (!BUTTON_PRESS())
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return BUTTON_SINGLE_CLICK;
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// Have we waited the full second?
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else
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if (now == (uint16_t)(start + ticks))
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return BUTTON_HOLD;
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WDT_HIT();
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}
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// We should never get here
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return BUTTON_ERROR;
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}
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// attempt at high resolution microsecond timer
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// beware: timer counts in 21.3uS increments (1024/48Mhz)
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void SpinDelayUs(int us)
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{
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int ticks = (48*us) >> 10;
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// Borrow a PWM unit for my real-time clock
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AT91C_BASE_PWMC->PWMC_ENA = PWM_CHANNEL(0);
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// 48 MHz / 1024 gives 46.875 kHz
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AT91C_BASE_PWMC_CH0->PWMC_CMR = PWM_CH_MODE_PRESCALER(10);
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AT91C_BASE_PWMC_CH0->PWMC_CDTYR = 0;
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AT91C_BASE_PWMC_CH0->PWMC_CPRDR = 0xffff;
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uint16_t start = AT91C_BASE_PWMC_CH0->PWMC_CCNTR;
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for(;;) {
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uint16_t now = AT91C_BASE_PWMC_CH0->PWMC_CCNTR;
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if (now == (uint16_t)(start + ticks))
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return;
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WDT_HIT();
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}
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}
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void SpinDelay(int ms)
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{
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// convert to uS and call microsecond delay function
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SpinDelayUs(ms*1000);
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}
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/* Similar to FpgaGatherVersion this formats stored version information
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* into a string representation. It takes a pointer to the struct version_information,
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* verifies the magic properties, then stores a formatted string, prefixed by
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* prefix in dst.
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*/
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void FormatVersionInformation(char *dst, int len, const char *prefix, void *version_information)
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{
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struct version_information *v = (struct version_information*)version_information;
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dst[0] = 0;
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strncat(dst, prefix, len);
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if(v->magic != VERSION_INFORMATION_MAGIC) {
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strncat(dst, "Missing/Invalid version information", len);
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return;
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}
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if(v->versionversion != 1) {
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strncat(dst, "Version information not understood", len);
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return;
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}
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if(!v->present) {
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strncat(dst, "Version information not available", len);
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return;
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}
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strncat(dst, v->svnversion, len);
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if(v->clean == 0) {
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strncat(dst, "-unclean", len);
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} else if(v->clean == 2) {
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strncat(dst, "-suspect", len);
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}
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strncat(dst, " ", len);
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strncat(dst, v->buildtime, len);
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}
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// -------------------------------------------------------------------------
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// timer lib
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// -------------------------------------------------------------------------
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// test procedure:
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//
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// ti = GetTickCount();
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// SpinDelay(1000);
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// ti = GetTickCount() - ti;
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// Dbprintf("timer(1s): %d t=%d", ti, GetTickCount());
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void StartTickCount()
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{
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// must be 0x40, but on my cpu - included divider is optimal
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// 0x20 - 1 ms / bit
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// 0x40 - 2 ms / bit
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AT91C_BASE_RTTC->RTTC_RTMR = AT91C_RTTC_RTTRST + 0x001D; // was 0x003B
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}
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/*
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* Get the current count.
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*/
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uint32_t RAMFUNC GetTickCount(){
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return AT91C_BASE_RTTC->RTTC_RTVR;// was * 2;
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}
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// -------------------------------------------------------------------------
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// microseconds timer
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// -------------------------------------------------------------------------
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void StartCountUS()
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{
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AT91C_BASE_PMC->PMC_PCER |= (0x1 << 12) | (0x1 << 13) | (0x1 << 14);
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// AT91C_BASE_TCB->TCB_BMR = AT91C_TCB_TC1XC1S_TIOA0;
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AT91C_BASE_TCB->TCB_BMR = AT91C_TCB_TC0XC0S_NONE | AT91C_TCB_TC1XC1S_TIOA0 | AT91C_TCB_TC2XC2S_NONE;
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// fast clock
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AT91C_BASE_TC0->TC_CCR = AT91C_TC_CLKDIS; // timer disable
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AT91C_BASE_TC0->TC_CMR = AT91C_TC_CLKS_TIMER_DIV3_CLOCK | // MCK(48MHz)/32 -- tick=1.5mks
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AT91C_TC_WAVE | AT91C_TC_WAVESEL_UP_AUTO | AT91C_TC_ACPA_CLEAR |
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AT91C_TC_ACPC_SET | AT91C_TC_ASWTRG_SET;
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AT91C_BASE_TC0->TC_RA = 1;
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AT91C_BASE_TC0->TC_RC = 0xBFFF + 1; // 0xC000
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AT91C_BASE_TC1->TC_CCR = AT91C_TC_CLKDIS; // timer disable
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AT91C_BASE_TC1->TC_CMR = AT91C_TC_CLKS_XC1; // from timer 0
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AT91C_BASE_TC0->TC_CCR = AT91C_TC_CLKEN;
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AT91C_BASE_TC1->TC_CCR = AT91C_TC_CLKEN;
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AT91C_BASE_TCB->TCB_BCR = 1;
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}
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uint32_t RAMFUNC GetCountUS(){
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return (AT91C_BASE_TC1->TC_CV * 0x8000) + ((AT91C_BASE_TC0->TC_CV / 15) * 10);
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}
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static uint32_t GlobalUsCounter = 0;
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uint32_t RAMFUNC GetDeltaCountUS(){
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uint32_t g_cnt = GetCountUS();
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uint32_t g_res = g_cnt - GlobalUsCounter;
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GlobalUsCounter = g_cnt;
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return g_res;
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}
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