]> git.zerfleddert.de Git - proxmark3-svn/blame - armsrc/util.c
Applied patch from http://www.proxmark.org/forum/viewtopic.php?id=1637, where a compi...
[proxmark3-svn] / armsrc / util.c
CommitLineData
e30c654b 1//-----------------------------------------------------------------------------
e30c654b 2// Jonathan Westhues, Sept 2005
bd20f8f4 3//
4// This code is licensed to you under the terms of the GNU GPL, version 2 or,
5// at your option, any later version. See the LICENSE.txt file for the text of
6// the license.
7//-----------------------------------------------------------------------------
8// Utility functions used in many places, not specific to any piece of code.
e30c654b 9//-----------------------------------------------------------------------------
bd20f8f4 10
e30c654b 11#include "proxmark3.h"
f7e3ed82 12#include "util.h"
9ab7a6c7 13#include "string.h"
e30c654b 14
195af472 15size_t nbytes(size_t nbits) {
16 return (nbits/8)+((nbits%8)>0);
17}
18
81cd0474 19uint32_t SwapBits(uint32_t value, int nrbits) {
20 int i;
21 uint32_t newvalue = 0;
22 for(i = 0; i < nrbits; i++) {
23 newvalue ^= ((value >> i) & 1) << (nrbits - 1 - i);
24 }
25 return newvalue;
26}
27
f7e3ed82 28void num_to_bytes(uint64_t n, size_t len, uint8_t* dest)
e30c654b 29{
30 while (len--) {
f7e3ed82 31 dest[len] = (uint8_t) n;
e30c654b 32 n >>= 8;
33 }
34}
35
f7e3ed82 36uint64_t bytes_to_num(uint8_t* src, size_t len)
e30c654b 37{
38 uint64_t num = 0;
39 while (len--)
40 {
41 num = (num << 8) | (*src);
42 src++;
43 }
44 return num;
45}
46
47void LEDsoff()
48{
49 LED_A_OFF();
50 LED_B_OFF();
51 LED_C_OFF();
52 LED_D_OFF();
53}
54
55// LEDs: R(C) O(A) G(B) -- R(D) [1, 2, 4 and 8]
56void LED(int led, int ms)
57{
58 if (led & LED_RED)
59 LED_C_ON();
60 if (led & LED_ORANGE)
61 LED_A_ON();
62 if (led & LED_GREEN)
63 LED_B_ON();
64 if (led & LED_RED2)
65 LED_D_ON();
66
67 if (!ms)
68 return;
69
70 SpinDelay(ms);
71
72 if (led & LED_RED)
73 LED_C_OFF();
74 if (led & LED_ORANGE)
75 LED_A_OFF();
76 if (led & LED_GREEN)
77 LED_B_OFF();
78 if (led & LED_RED2)
79 LED_D_OFF();
80}
81
82
83// Determine if a button is double clicked, single clicked,
84// not clicked, or held down (for ms || 1sec)
85// In general, don't use this function unless you expect a
86// double click, otherwise it will waste 500ms -- use BUTTON_HELD instead
87int BUTTON_CLICKED(int ms)
88{
89 // Up to 500ms in between clicks to mean a double click
90 int ticks = (48000 * (ms ? ms : 1000)) >> 10;
91
92 // If we're not even pressed, forget about it!
93 if (!BUTTON_PRESS())
94 return BUTTON_NO_CLICK;
95
96 // Borrow a PWM unit for my real-time clock
97 AT91C_BASE_PWMC->PWMC_ENA = PWM_CHANNEL(0);
98 // 48 MHz / 1024 gives 46.875 kHz
99 AT91C_BASE_PWMC_CH0->PWMC_CMR = PWM_CH_MODE_PRESCALER(10);
100 AT91C_BASE_PWMC_CH0->PWMC_CDTYR = 0;
101 AT91C_BASE_PWMC_CH0->PWMC_CPRDR = 0xffff;
102
f7e3ed82 103 uint16_t start = AT91C_BASE_PWMC_CH0->PWMC_CCNTR;
e30c654b 104
105 int letoff = 0;
106 for(;;)
107 {
f7e3ed82 108 uint16_t now = AT91C_BASE_PWMC_CH0->PWMC_CCNTR;
e30c654b 109
110 // We haven't let off the button yet
111 if (!letoff)
112 {
113 // We just let it off!
114 if (!BUTTON_PRESS())
115 {
116 letoff = 1;
117
118 // reset our timer for 500ms
119 start = AT91C_BASE_PWMC_CH0->PWMC_CCNTR;
120 ticks = (48000 * (500)) >> 10;
121 }
122
123 // Still haven't let it off
124 else
125 // Have we held down a full second?
f7e3ed82 126 if (now == (uint16_t)(start + ticks))
e30c654b 127 return BUTTON_HOLD;
128 }
129
130 // We already let off, did we click again?
131 else
132 // Sweet, double click!
133 if (BUTTON_PRESS())
134 return BUTTON_DOUBLE_CLICK;
135
136 // Have we ran out of time to double click?
137 else
f7e3ed82 138 if (now == (uint16_t)(start + ticks))
e30c654b 139 // At least we did a single click
140 return BUTTON_SINGLE_CLICK;
141
142 WDT_HIT();
143 }
144
145 // We should never get here
146 return BUTTON_ERROR;
147}
148
149// Determine if a button is held down
150int BUTTON_HELD(int ms)
151{
152 // If button is held for one second
153 int ticks = (48000 * (ms ? ms : 1000)) >> 10;
154
155 // If we're not even pressed, forget about it!
156 if (!BUTTON_PRESS())
157 return BUTTON_NO_CLICK;
158
159 // Borrow a PWM unit for my real-time clock
160 AT91C_BASE_PWMC->PWMC_ENA = PWM_CHANNEL(0);
161 // 48 MHz / 1024 gives 46.875 kHz
162 AT91C_BASE_PWMC_CH0->PWMC_CMR = PWM_CH_MODE_PRESCALER(10);
163 AT91C_BASE_PWMC_CH0->PWMC_CDTYR = 0;
164 AT91C_BASE_PWMC_CH0->PWMC_CPRDR = 0xffff;
165
f7e3ed82 166 uint16_t start = AT91C_BASE_PWMC_CH0->PWMC_CCNTR;
e30c654b 167
168 for(;;)
169 {
f7e3ed82 170 uint16_t now = AT91C_BASE_PWMC_CH0->PWMC_CCNTR;
e30c654b 171
172 // As soon as our button let go, we didn't hold long enough
173 if (!BUTTON_PRESS())
174 return BUTTON_SINGLE_CLICK;
175
176 // Have we waited the full second?
177 else
f7e3ed82 178 if (now == (uint16_t)(start + ticks))
e30c654b 179 return BUTTON_HOLD;
180
181 WDT_HIT();
182 }
183
184 // We should never get here
185 return BUTTON_ERROR;
186}
187
188// attempt at high resolution microsecond timer
189// beware: timer counts in 21.3uS increments (1024/48Mhz)
190void SpinDelayUs(int us)
191{
192 int ticks = (48*us) >> 10;
193
194 // Borrow a PWM unit for my real-time clock
195 AT91C_BASE_PWMC->PWMC_ENA = PWM_CHANNEL(0);
196 // 48 MHz / 1024 gives 46.875 kHz
197 AT91C_BASE_PWMC_CH0->PWMC_CMR = PWM_CH_MODE_PRESCALER(10);
198 AT91C_BASE_PWMC_CH0->PWMC_CDTYR = 0;
199 AT91C_BASE_PWMC_CH0->PWMC_CPRDR = 0xffff;
200
f7e3ed82 201 uint16_t start = AT91C_BASE_PWMC_CH0->PWMC_CCNTR;
e30c654b 202
203 for(;;) {
f7e3ed82 204 uint16_t now = AT91C_BASE_PWMC_CH0->PWMC_CCNTR;
205 if (now == (uint16_t)(start + ticks))
e30c654b 206 return;
207
208 WDT_HIT();
209 }
210}
211
212void SpinDelay(int ms)
213{
214 // convert to uS and call microsecond delay function
215 SpinDelayUs(ms*1000);
216}
217
218/* Similar to FpgaGatherVersion this formats stored version information
219 * into a string representation. It takes a pointer to the struct version_information,
220 * verifies the magic properties, then stores a formatted string, prefixed by
221 * prefix in dst.
222 */
223void FormatVersionInformation(char *dst, int len, const char *prefix, void *version_information)
224{
225 struct version_information *v = (struct version_information*)version_information;
226 dst[0] = 0;
227 strncat(dst, prefix, len);
228 if(v->magic != VERSION_INFORMATION_MAGIC) {
229 strncat(dst, "Missing/Invalid version information", len);
230 return;
231 }
232 if(v->versionversion != 1) {
233 strncat(dst, "Version information not understood", len);
234 return;
235 }
236 if(!v->present) {
237 strncat(dst, "Version information not available", len);
238 return;
239 }
240
241 strncat(dst, v->svnversion, len);
242 if(v->clean == 0) {
243 strncat(dst, "-unclean", len);
244 } else if(v->clean == 2) {
245 strncat(dst, "-suspect", len);
246 }
247
248 strncat(dst, " ", len);
249 strncat(dst, v->buildtime, len);
250}
9ca155ba
M
251
252// -------------------------------------------------------------------------
253// timer lib
254// -------------------------------------------------------------------------
255// test procedure:
256//
257// ti = GetTickCount();
258// SpinDelay(1000);
259// ti = GetTickCount() - ti;
260// Dbprintf("timer(1s): %d t=%d", ti, GetTickCount());
261
262void StartTickCount()
263{
264// must be 0x40, but on my cpu - included divider is optimal
265// 0x20 - 1 ms / bit
266// 0x40 - 2 ms / bit
267
0a39986e 268 AT91C_BASE_RTTC->RTTC_RTMR = AT91C_RTTC_RTTRST + 0x001D; // was 0x003B
9ca155ba
M
269}
270
271/*
272* Get the current count.
273*/
274uint32_t RAMFUNC GetTickCount(){
8f51ddb0 275 return AT91C_BASE_RTTC->RTTC_RTVR;// was * 2;
9ca155ba
M
276}
277
8f51ddb0
M
278// -------------------------------------------------------------------------
279// microseconds timer
280// -------------------------------------------------------------------------
281void StartCountUS()
282{
283 AT91C_BASE_PMC->PMC_PCER |= (0x1 << 12) | (0x1 << 13) | (0x1 << 14);
284// AT91C_BASE_TCB->TCB_BMR = AT91C_TCB_TC1XC1S_TIOA0;
285 AT91C_BASE_TCB->TCB_BMR = AT91C_TCB_TC0XC0S_NONE | AT91C_TCB_TC1XC1S_TIOA0 | AT91C_TCB_TC2XC2S_NONE;
286
287 // fast clock
288 AT91C_BASE_TC0->TC_CCR = AT91C_TC_CLKDIS; // timer disable
289 AT91C_BASE_TC0->TC_CMR = AT91C_TC_CLKS_TIMER_DIV3_CLOCK | // MCK(48MHz)/32 -- tick=1.5mks
290 AT91C_TC_WAVE | AT91C_TC_WAVESEL_UP_AUTO | AT91C_TC_ACPA_CLEAR |
291 AT91C_TC_ACPC_SET | AT91C_TC_ASWTRG_SET;
292 AT91C_BASE_TC0->TC_RA = 1;
293 AT91C_BASE_TC0->TC_RC = 0xBFFF + 1; // 0xC000
294
295 AT91C_BASE_TC1->TC_CCR = AT91C_TC_CLKDIS; // timer disable
296 AT91C_BASE_TC1->TC_CMR = AT91C_TC_CLKS_XC1; // from timer 0
297
298 AT91C_BASE_TC0->TC_CCR = AT91C_TC_CLKEN;
299 AT91C_BASE_TC1->TC_CCR = AT91C_TC_CLKEN;
300 AT91C_BASE_TCB->TCB_BCR = 1;
301}
302
303uint32_t RAMFUNC GetCountUS(){
304 return (AT91C_BASE_TC1->TC_CV * 0x8000) + ((AT91C_BASE_TC0->TC_CV / 15) * 10);
305}
306
307static uint32_t GlobalUsCounter = 0;
308
309uint32_t RAMFUNC GetDeltaCountUS(){
310 uint32_t g_cnt = GetCountUS();
311 uint32_t g_res = g_cnt - GlobalUsCounter;
312 GlobalUsCounter = g_cnt;
313 return g_res;
314}
315
316
Impressum, Datenschutz