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CHG: forgot to add the reflect function

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This commit is contained in:
iceman1001 2016-07-28 21:45:00 +02:00
parent 3e134b4c20
commit ab3af4fe85
1 changed files with 28 additions and 27 deletions
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55
armsrc/util.c
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@ -8,11 +8,7 @@
// Utility functions used in many places, not specific to any piece of code.
//-----------------------------------------------------------------------------
#include "proxmark3.h"
#include "util.h"
#include "string.h"
#include "apps.h"
#include "BigBuf.h"
void print_result(char *name, uint8_t *buf, size_t len) {
uint8_t *p = buf;
@ -48,6 +44,23 @@ uint32_t SwapBits(uint32_t value, int nrbits) {
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;
@ -80,13 +93,11 @@ void lsl (uint8_t *data, size_t len) {
data[len - 1] <<= 1;
}
int32_t le24toh (uint8_t data[3])
{
int32_t le24toh (uint8_t data[3]) {
return (data[2] << 16) | (data[1] << 8) | data[0];
}
void LEDsoff()
{
void LEDsoff() {
LED_A_OFF();
LED_B_OFF();
LED_C_OFF();
@ -94,8 +105,7 @@ void LEDsoff()
}
// LEDs: R(C) O(A) G(B) -- R(D) [1, 2, 4 and 8]
void LED(int led, int ms)
{
void LED(int led, int ms) {
if (led & LED_RED)
LED_C_ON();
if (led & LED_ORANGE)
@ -120,13 +130,11 @@ void LED(int led, int ms)
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)
{
int BUTTON_CLICKED(int ms) {
// Up to 500ms in between clicks to mean a double click
int ticks = (48000 * (ms ? ms : 1000)) >> 10;
@ -188,8 +196,7 @@ int BUTTON_CLICKED(int ms)
}
// Determine if a button is held down
int BUTTON_HELD(int ms)
{
int BUTTON_HELD(int ms) {
// If button is held for one second
int ticks = (48000 * (ms ? ms : 1000)) >> 10;
@ -228,8 +235,7 @@ int BUTTON_HELD(int ms)
// attempt at high resolution microsecond timer
// beware: timer counts in 21.3uS increments (1024/48Mhz)
void SpinDelayUs(int us)
{
void SpinDelayUs(int us) {
int ticks = (48*us) >> 10;
// Borrow a PWM unit for my real-time clock
@ -250,8 +256,7 @@ void SpinDelayUs(int us)
}
}
void SpinDelay(int ms)
{
void SpinDelay(int ms) {
// convert to uS and call microsecond delay function
SpinDelayUs(ms*1000);
}
@ -261,8 +266,7 @@ void SpinDelay(int ms)
* 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)
{
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);
@ -301,8 +305,7 @@ void FormatVersionInformation(char *dst, int len, const char *prefix, void *vers
// ti = GetTickCount() - ti;
// Dbprintf("timer(1s): %d t=%d", ti, GetTickCount());
void StartTickCount()
{
void StartTickCount() {
// This timer is based on the slow clock. The slow clock frequency is between 22kHz and 40kHz.
// We can determine the actual slow clock frequency by looking at the Main Clock Frequency Register.
uint16_t mainf = AT91C_BASE_PMC->PMC_MCFR & 0xffff; // = 16 * main clock frequency (16MHz) / slow clock frequency
@ -321,8 +324,7 @@ uint32_t RAMFUNC GetTickCount(){
// -------------------------------------------------------------------------
// microseconds timer
// -------------------------------------------------------------------------
void StartCountUS()
{
void StartCountUS() {
AT91C_BASE_PMC->PMC_PCER |= (0x1 << 12) | (0x1 << 13) | (0x1 << 14);
// AT91C_BASE_TCB->TCB_BMR = AT91C_TCB_TC1XC1S_TIOA0;
AT91C_BASE_TCB->TCB_BMR = AT91C_TCB_TC0XC0S_NONE | AT91C_TCB_TC1XC1S_TIOA0 | AT91C_TCB_TC2XC2S_NONE;
@ -363,8 +365,7 @@ uint32_t RAMFUNC GetCountUS(){
// -------------------------------------------------------------------------
// Timer for iso14443 commands. Uses ssp_clk from FPGA
// -------------------------------------------------------------------------
void StartCountSspClk()
{
void StartCountSspClk() {
AT91C_BASE_PMC->PMC_PCER = (1 << AT91C_ID_TC0) | (1 << AT91C_ID_TC1) | (1 << AT91C_ID_TC2); // Enable Clock to all timers
AT91C_BASE_TCB->TCB_BMR = AT91C_TCB_TC0XC0S_TIOA1 // XC0 Clock = TIOA1
| AT91C_TCB_TC1XC1S_NONE // XC1 Clock = none