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CHG: reverted back from the idea of measureing in (us) microseconds, the timer is too raw, gives 10-15us delays. Now we are measuring ticks, which is (1 us = 1.5ticks)

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like it was before.   ie:  80us = 80*1.5 = 120ticks.
This commit is contained in:
iceman1001 2016-09-11 11:14:12 +02:00
parent db44e049b0
commit 76471e5d17
5 changed files with 53 additions and 38 deletions
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74
armsrc/legicrf.c
View file

@ -62,18 +62,15 @@ static void setup_timer(void) {
//#define RWD_TIME_1 150 /* RWD_TIME_PAUSE off, 80us on = 100us */
//#define RWD_TIME_0 90 /* RWD_TIME_PAUSE off, 40us on = 60us */
//#define RWD_TIME_PAUSE 30 /* 20us */
#define US_CALIBRATION 4
#define RWD_TIME_1 80-US_CALIBRATION /* READER_TIME_PAUSE off, 80us on = 100us */
#define RWD_TIME_0 40-US_CALIBRATION /* READER_TIME_PAUSE off, 40us on = 60us */
#define RWD_TIME_PAUSE 20-US_CALIBRATION /* 20us */
#define TAG_BIT_PERIOD 100-US_CALIBRATION // 100us for every bit
#define RWD_TIME_FUZZ 20 /* rather generous 13us, since the peak detector + hysteresis fuzz quite a bit */
#define TAG_TIME_WAIT 330 - US_CALIBRATION // 330us from READER frame end to TAG frame start, experimentally determined (490)
#define RDW_TIME_WAIT 258 //
// testing calculating in ticks instead of (us) microseconds.
#define RWD_TIME_1 120 // READER_TIME_PAUSE off, 80us on = 100us 80 * 1.5 == 120ticks
#define RWD_TIME_0 60 // READER_TIME_PAUSE off, 40us on = 60us 40 * 1.5 == 60ticks
#define RWD_TIME_PAUSE 30 // 20us == 20 * 1.5 == 30ticks */
#define TAG_BIT_PERIOD 150 // 100us == 100 * 1.5 == 150ticks
#define RWD_TIME_FUZZ 20 // rather generous 13us, since the peak detector + hysteresis fuzz quite a bit
#define TAG_TIME_WAIT 495 // 330us from READER frame end to TAG frame start. 330 * 1.5 == 495
#define SIM_DIVISOR 586 /* prng_time/SIM_DIVISOR count prng needs to be forwared */
#define SIM_SHIFT 900 /* prng_time+SIM_SHIFT shift of delayed start */
@ -95,14 +92,25 @@ uint32_t stop_send_frame_us = 0;
// ~ 258us + 100us*delay
#define WAIT(delay) SpinDelayCountUs((delay));
#define COIL_PULSE(x) { SHORT_COIL; WAIT(RWD_TIME_PAUSE); OPEN_COIL; WAIT((x)); }
#define COIL_PULSE_PAUSE { SHORT_COIL; WAIT(RWD_TIME_PAUSE); OPEN_COIL; }
#define COIL_PULSE(x) { \
SHORT_COIL; \
Wait(RWD_TIME_PAUSE); \
OPEN_COIL; \
Wait(x); \
}
#define GET_COUNT_US GetCountUS()
// ToDo: define a meaningful maximum size for auth_table. The bigger this is, the lower will be the available memory for traces.
// Historically it used to be FREE_BUFFER_SIZE, which was 2744.
#define LEGIC_CARD_MEMSIZE 1024
static uint8_t* cardmem;
static void Wait(uint32_t time){
if ( time == 0 ) return;
time += AT91C_BASE_TC0->TC_CV;
while(AT91C_BASE_TC0->TC_CV < time);
}
// Starts Clock and waits until its reset
static void Reset(AT91PS_TC clock){
clock->TC_CCR = AT91C_TC_CLKEN | AT91C_TC_SWTRG;
@ -222,7 +230,7 @@ static void frame_send_tag(uint16_t response, uint8_t bits, uint8_t crypt) {
*/
static void frame_sendAsReader(uint32_t data, uint8_t bits){
uint32_t starttime = GetCountUS();
uint32_t starttime = AT91C_BASE_TC0->TC_CV;
uint32_t send = data;
uint8_t prng1 = legic_prng_count() ;
uint16_t mask = 1;
@ -233,16 +241,20 @@ static void frame_sendAsReader(uint32_t data, uint8_t bits){
for (; mask < BITMASK(bits); mask <<= 1) {
if (send & mask) {
COIL_PULSE(RWD_TIME_1);
COIL_PULSE(RWD_TIME_1);
} else {
COIL_PULSE(RWD_TIME_0);
COIL_PULSE(RWD_TIME_0);
}
}
// One final pause to mark the end of the frame
COIL_PULSE_PAUSE;
// Final pause to mark the end of the frame
// tempo = AT91C_BASE_TC0->TC_CV + RWD_TIME_PAUSE;
// SHORT_COIL;
// while(AT91C_BASE_TC0->TC_CV < tempo);
// OPEN_COIL;
COIL_PULSE(0);
stop_send_frame_us = GetCountUS();
stop_send_frame_us = AT91C_BASE_TC0->TC_CV;
uint8_t cmdbytes[] = {
data & 0xFF,
(data >> 8) & 0xFF,
@ -278,7 +290,7 @@ static void frame_sendAsReader(uint32_t data, uint8_t bits){
*/
static void frame_receiveAsReader(struct legic_frame * const f, uint8_t bits, uint8_t crypt) {
uint32_t starttime = GetCountUS();
uint32_t starttime = AT91C_BASE_TC0->TC_CV;
frame_clean(f);
@ -305,15 +317,14 @@ static void frame_receiveAsReader(struct legic_frame * const f, uint8_t bits, ui
data = lsfr;
//FIXED time between sending frame and now listening frame. 330us
uint32_t icetime = TAG_TIME_WAIT - ( GetCountUS() - stop_send_frame_us );
WAIT( icetime ); // 8-10us
uint32_t icetime = TAG_TIME_WAIT - ( AT91C_BASE_TC0->TC_CV - stop_send_frame_us );
while ( AT91C_BASE_TC0->TC_CV != icetime );
next_bit_at = GetCountUS();
next_bit_at += TAG_BIT_PERIOD;
next_bit_at = AT91C_BASE_TC0->TC_CV + TAG_BIT_PERIOD;
for( i = 0; i < bits; i++) {
edges = 0;
while ( GetCountUS() < next_bit_at) {
while ( AT91C_BASE_TC0->TC_CV < next_bit_at) {
level = (AT91C_BASE_PIOA->PIO_PDSR & GPIO_SSC_DIN);
@ -325,7 +336,7 @@ static void frame_receiveAsReader(struct legic_frame * const f, uint8_t bits, ui
next_bit_at += TAG_BIT_PERIOD;
// We expect 42 edges == ONE
if(edges > 20 && edges < 60)
if(edges > 20 && edges < 60)
data ^= the_bit;
the_bit <<= 1;
@ -336,7 +347,7 @@ static void frame_receiveAsReader(struct legic_frame * const f, uint8_t bits, ui
f->bits = bits;
// log
stop_send_frame_us = GetCountUS();
stop_send_frame_us = AT91C_BASE_TC0->TC_CV;
uint8_t cmdbytes[] = {
(data & 0xFF),
@ -534,10 +545,17 @@ int LegicRfReader(int offset, int bytes, int iv) {
int byte_index = 0, cmd_sz = 0, card_sz = 0;
if ( MF_DBGLEVEL >= 2) {
Dbprintf("setting up legic card, IV = %x", iv);
Dbprintf("setting up legic card, IV = %x", iv);
Dbprintf("ONE %d ZERO %d PAUSE %d", RWD_TIME_1 , RWD_TIME_0 , RWD_TIME_PAUSE);
Dbprintf("TAG BIT PERIOD %d FUZZ %d TAG WAIT TIME %d", TAG_BIT_PERIOD, RWD_TIME_FUZZ, TAG_TIME_WAIT);
// StartCountUS();
// for ( uint8_t i =0; i<255; ++i){
// uint32_t t1 = GET_COUNT_US;
// WAIT(i)
// t1 = GET_COUNT_US - t1;
// Dbprintf("WAIT(%d) == %u | %u | diff %d", i, t1-i );
// }
}
LegicCommonInit();

12
armsrc/lfops.c
View file

@ -1144,7 +1144,7 @@ void TurnReadLFOn(int delay) {
//int adcval = ((MAX_ADC_LF_VOLTAGE * AvgAdc(ADC_CHAN_LF)) >> 10);
// where to save it
SpinDelayUs(delay); // ICEMAN: problem with (us) clock is 21.3us increments
SpinDelayCountUs(delay); // ICEMAN: problem with (us) clock is 21.3us increments
}
// Write one bit to card
@ -1154,7 +1154,7 @@ void T55xxWriteBit(int bit) {
else
TurnReadLFOn(WRITE_1);
FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
SpinDelayUs(WRITE_GAP); // ICEMAN: problem with (us) clock is 21.3us increments
SpinDelayCountUs(WRITE_GAP); // ICEMAN: problem with (us) clock is 21.3us increments
}
// Send T5577 reset command then read stream (see if we can identify the start of the stream)
@ -1168,7 +1168,7 @@ void T55xxResetRead(void) {
// Trigger T55x7 in mode.
FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
SpinDelayUs(START_GAP); // ICEMAN: problem with (us) clock is 21.3us increments
SpinDelayCountUs(START_GAP); // ICEMAN: problem with (us) clock is 21.3us increments
// reset tag - op code 00
T55xxWriteBit(0);
@ -1198,7 +1198,7 @@ void T55xxWriteBlockExt(uint32_t Data, uint8_t Block, uint32_t Pwd, uint8_t arg)
// Trigger T55x7 in mode.
FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
SpinDelayUs(START_GAP); // ICEMAN: problem with (us) clock is 21.3us increments
SpinDelayCountUs(START_GAP); // ICEMAN: problem with (us) clock is 21.3us increments
// Opcode 10
T55xxWriteBit(1);
@ -1258,7 +1258,7 @@ void T55xxReadBlock(uint16_t arg0, uint8_t Block, uint32_t Pwd) {
// Trigger T55x7 Direct Access Mode with start gap
FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
SpinDelayUs(START_GAP); // ICEMAN: problem with (us) clock is 21.3us increments
SpinDelayCountUs(START_GAP); // ICEMAN: problem with (us) clock is 21.3us increments
// Opcode 1[page]
T55xxWriteBit(1);
@ -1298,7 +1298,7 @@ void T55xxWakeUp(uint32_t Pwd){
// Trigger T55x7 Direct Access Mode
FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
SpinDelayUs(START_GAP); // ICEMAN: problem with (us) clock is 21.3us increments
SpinDelayCountUs(START_GAP); // ICEMAN: problem with (us) clock is 21.3us increments
// Opcode 10
T55xxWriteBit(1);

2
armsrc/pcf7931.c
View file

@ -488,8 +488,6 @@ bool AddBitPCF7931(bool b, uint32_t * tab, int32_t l, int32_t p){
tab[u+2] = 24 * T0_PCF + tab[u+1] - l - p;
return 0;
}
return 1;
}

2
client/cmdhflegic.c
View file

@ -415,7 +415,7 @@ int CmdLegicRFRead(const char *Cmd) {
clearCommandBuffer();
SendCommand(&c);
UsbCommand resp;
if (WaitForResponseTimeout(CMD_ACK, &resp, 2000)) {
if (WaitForResponseTimeout(CMD_ACK, &resp, 1500)) {
uint8_t isOK = resp.arg[0] & 0xFF;
uint16_t len = resp.arg[1] & 0x3FF;
if ( isOK ) {

1
client/util.c
View file

@ -280,7 +280,6 @@ int param_getptr(const char *line, int *bg, int *en, int paramnum)
return 0;
}
char param_getchar(const char *line, int paramnum)
{
int bg, en;