+//-----------------------------------------------------------------------------
+// Jonathan Westhues, Sept 2005
+//
+// This code is licensed to you under the terms of the GNU GPL, version 2 or,
+// at your option, any later version. See the LICENSE.txt file for the text of
+// the license.
+//-----------------------------------------------------------------------------
+// Utility functions used in many places, not specific to any piece of code.
+//-----------------------------------------------------------------------------
+#include "util.h"
+
+size_t nbytes(size_t nbits) {
+ return (nbits >> 3)+((nbits % 8) > 0);
+}
+
+uint32_t SwapBits(uint32_t value, int nrbits) {
+ uint32_t newvalue = 0;
+ for(int i = 0; i < nrbits; i++) {
+ newvalue ^= ((value >> i) & 1) << (nrbits - 1 - i);
+ }
+ return newvalue;
+}
+
+/*
+ ref http://www.csm.ornl.gov/~dunigan/crc.html
+ Returns the value v with the bottom b [0,32] bits reflected.
+ Example: reflect(0x3e23L,3) == 0x3e26
+*/
+uint32_t reflect(uint32_t v, int b) {
+ uint32_t t = v;
+ for ( int i = 0; i < b; ++i) {
+ if (t & 1)
+ v |= BITMASK((b-1)-i);
+ else
+ v &= ~BITMASK((b-1)-i);
+ t >>= 1;
+ }
+ return v;
+}
+
+void num_to_bytes(uint64_t n, size_t len, uint8_t* dest) {
+ while (len--) {
+ dest[len] = (uint8_t) n;
+ n >>= 8;
+ }
+}
+
+uint64_t bytes_to_num(uint8_t* src, size_t len) {
+ uint64_t num = 0;
+ while (len--) {
+ num = (num << 8) | (*src);
+ src++;
+ }
+ return num;
+}
+
+// RotateLeft - Ultralight, Desfire
+void rol(uint8_t *data, const size_t len) {
+ uint8_t first = data[0];
+ for (size_t i = 0; i < len-1; i++) {
+ data[i] = data[i+1];
+ }
+ data[len-1] = first;
+}
+
+void lsl (uint8_t *data, size_t len) {
+ for (size_t n = 0; n < len - 1; n++) {
+ data[n] = (data[n] << 1) | (data[n+1] >> 7);
+ }
+ data[len - 1] <<= 1;
+}
+
+int32_t le24toh (uint8_t data[3]) {
+ return (data[2] << 16) | (data[1] << 8) | data[0];
+}
+
+//convert hex digit to integer
+uint8_t hex2int(char hexchar){
+ switch(hexchar){
+ case '0': return 0; break;
+ case '1': return 1; break;
+ case '2': return 2; break;
+ case '3': return 3; break;
+ case '4': return 4; break;
+ case '5': return 5; break;
+ case '6': return 6; break;
+ case '7': return 7; break;
+ case '8': return 8; break;
+ case '9': return 9; break;
+ case 'a':
+ case 'A': return 10; break;
+ case 'b':
+ case 'B': return 11; break;
+ case 'c':
+ case 'C': return 12; break;
+ case 'd':
+ case 'D': return 13; break;
+ case 'e':
+ case 'E': return 14; break;
+ case 'f':
+ case 'F': return 15; break;
+ default:
+ return 0;
+ }
+}
+
+void LEDsoff() {
+ LED_A_OFF();
+ LED_B_OFF();
+ LED_C_OFF();
+ LED_D_OFF();
+}
+
+// LEDs: R(C) O(A) G(B) -- R(D) [1, 2, 4 and 8]
+void LED(int led, int ms) {
+ if (led & LED_RED)
+ LED_C_ON();
+ if (led & LED_ORANGE)
+ LED_A_ON();
+ if (led & LED_GREEN)
+ LED_B_ON();
+ if (led & LED_RED2)
+ LED_D_ON();
+
+ if (!ms)
+ return;
+
+ SpinDelay(ms);
+
+ if (led & LED_RED)
+ LED_C_OFF();
+ if (led & LED_ORANGE)
+ LED_A_OFF();
+ if (led & LED_GREEN)
+ LED_B_OFF();
+ if (led & LED_RED2)
+ LED_D_OFF();
+}
+
+// Determine if a button is double clicked, single clicked,
+// not clicked, or held down (for ms || 1sec)
+// In general, don't use this function unless you expect a
+// double click, otherwise it will waste 500ms -- use BUTTON_HELD instead
+int BUTTON_CLICKED(int ms) {
+ // Up to 500ms in between clicks to mean a double click
+ int ticks = (48000 * (ms ? ms : 1000)) >> 10;
+
+ // If we're not even pressed, forget about it!
+ if (!BUTTON_PRESS())
+ return BUTTON_NO_CLICK;
+
+ // Borrow a PWM unit for my real-time clock
+ AT91C_BASE_PWMC->PWMC_ENA = PWM_CHANNEL(0);
+ // 48 MHz / 1024 gives 46.875 kHz
+ AT91C_BASE_PWMC_CH0->PWMC_CMR = PWM_CH_MODE_PRESCALER(10);
+ AT91C_BASE_PWMC_CH0->PWMC_CDTYR = 0;
+ AT91C_BASE_PWMC_CH0->PWMC_CPRDR = 0xffff;
+
+ uint16_t start = AT91C_BASE_PWMC_CH0->PWMC_CCNTR;
+
+ int letoff = 0;
+ for(;;)
+ {
+ uint16_t now = AT91C_BASE_PWMC_CH0->PWMC_CCNTR;
+
+ // We haven't let off the button yet
+ if (!letoff)
+ {
+ // We just let it off!
+ if (!BUTTON_PRESS())
+ {
+ letoff = 1;
+
+ // reset our timer for 500ms
+ start = AT91C_BASE_PWMC_CH0->PWMC_CCNTR;
+ ticks = (48000 * (500)) >> 10;
+ }
+
+ // Still haven't let it off
+ else
+ // Have we held down a full second?
+ if (now == (uint16_t)(start + ticks))
+ return BUTTON_HOLD;
+ }
+
+ // We already let off, did we click again?
+ else
+ // Sweet, double click!
+ if (BUTTON_PRESS())
+ return BUTTON_DOUBLE_CLICK;
+
+ // Have we ran out of time to double click?
+ else
+ if (now == (uint16_t)(start + ticks))
+ // At least we did a single click
+ return BUTTON_SINGLE_CLICK;
+
+ WDT_HIT();
+ }
+
+ // We should never get here
+ return BUTTON_ERROR;
+}
+
+// Determine if a button is held down
+int BUTTON_HELD(int ms) {
+ // If button is held for one second
+ int ticks = (48000 * (ms ? ms : 1000)) >> 10;
+
+ // If we're not even pressed, forget about it!
+ if (!BUTTON_PRESS())
+ return BUTTON_NO_CLICK;
+
+ // Borrow a PWM unit for my real-time clock
+ AT91C_BASE_PWMC->PWMC_ENA = PWM_CHANNEL(0);
+ // 48 MHz / 1024 gives 46.875 kHz
+ AT91C_BASE_PWMC_CH0->PWMC_CMR = PWM_CH_MODE_PRESCALER(10);
+ AT91C_BASE_PWMC_CH0->PWMC_CDTYR = 0;
+ AT91C_BASE_PWMC_CH0->PWMC_CPRDR = 0xffff;
+
+ uint16_t start = AT91C_BASE_PWMC_CH0->PWMC_CCNTR;
+
+ for(;;)
+ {
+ uint16_t now = AT91C_BASE_PWMC_CH0->PWMC_CCNTR;
+
+ // As soon as our button let go, we didn't hold long enough
+ if (!BUTTON_PRESS())
+ return BUTTON_SINGLE_CLICK;
+
+ // Have we waited the full second?
+ else
+ if (now == (uint16_t)(start + ticks))
+ return BUTTON_HOLD;
+
+ WDT_HIT();
+ }
+
+ // We should never get here
+ return BUTTON_ERROR;
+}
+
+/* Similar to FpgaGatherVersion this formats stored version information
+ * into a string representation. It takes a pointer to the struct version_information,
+ * verifies the magic properties, then stores a formatted string, prefixed by
+ * prefix in dst.
+ */
+void FormatVersionInformation(char *dst, int len, const char *prefix, void *version_information) {
+ struct version_information *v = (struct version_information*)version_information;
+ dst[0] = 0;
+ strncat(dst, prefix, len-1);
+ if(v->magic != VERSION_INFORMATION_MAGIC) {
+ strncat(dst, "Missing/Invalid version information\n", len - strlen(dst) - 1);
+ return;
+ }
+ if(v->versionversion != 1) {
+ strncat(dst, "Version information not understood\n", len - strlen(dst) - 1);
+ return;
+ }
+ if(!v->present) {
+ strncat(dst, "Version information not available\n", len - strlen(dst) - 1);
+ return;
+ }
+
+ strncat(dst, v->gitversion, len - strlen(dst) - 1);
+ if(v->clean == 0) {
+ strncat(dst, "-unclean", len - strlen(dst) - 1);
+ } else if(v->clean == 2) {
+ strncat(dst, "-suspect", len - strlen(dst) - 1);
+ }
+
+ strncat(dst, " ", len - strlen(dst) - 1);
+ strncat(dst, v->buildtime, len - strlen(dst) - 1);
+ strncat(dst, "\n", len - strlen(dst) - 1);
+}
projects / proxmark3-svn / blobdiff