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CHG: minor updates in the T55x7 methods. added the LED_A_ON / LED_A_OFF to indicate when a T55x7 command is running.

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CHG: added some more comments to T55x7,  next person who looks at this will have it easier.
This commit is contained in:
iceman1001 2015-10-15 11:00:07 +02:00
commit e16054a468
3 changed files with 34 additions and 39 deletions
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64
armsrc/lfops.c
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@ -1151,14 +1151,10 @@ void CmdIOdemodFSK(int findone, int *high, int *low, int ledcontrol)
// TIMER_CLOCK1 = MCK/2, MCK is running at 48 MHz, Timer is running at 48/2 = 24 MHz
// Hitag units (T0) have duration of 8 microseconds (us), which is 1/125000 per second (carrier)
// T0 = TIMER_CLOCK1 / 125000 = 192
// 1 Cycle = 8 microseconds(us)
// 1 Cycle = 8 microseconds(us) == 1 field clock
// Write one bit to card
void T55xxWriteBit(int bit)
{
//FpgaDownloadAndGo(FPGA_BITSTREAM_LF);
FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 95); //125Khz
void T55xxWriteBit(int bit) {
FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_ADC | FPGA_LF_ADC_READER_FIELD);
if (!bit)
SpinDelayUs(WRITE_0);
@ -1169,54 +1165,58 @@ void T55xxWriteBit(int bit)
}
// Write one card block in page 0, no lock
void T55xxWriteBlock(uint32_t Data, uint32_t Block, uint32_t Pwd, uint8_t PwdMode)
{
void T55xxWriteBlock(uint32_t Data, uint32_t Block, uint32_t Pwd, uint8_t PwdMode) {
LED_A_ON();
uint32_t i = 0;
// Set up FPGA, 125kHz
// Wait for config.. (192+8190xPOW)x8 == 67ms
LFSetupFPGAForADC(95, true);
// Now start writting
// Trigger T55x7 in mode.
FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
SpinDelayUs(START_GAP);
// Opcode
// Opcode 10
T55xxWriteBit(1);
T55xxWriteBit(0); //Page 0
if (PwdMode == 1){
// Pwd
// Send pwd
for (i = 0x80000000; i != 0; i >>= 1)
T55xxWriteBit(Pwd & i);
}
// Lock bit
// Send lock bit
T55xxWriteBit(0);
// Data
// Send data
for (i = 0x80000000; i != 0; i >>= 1)
T55xxWriteBit(Data & i);
// Block
// Send block number
for (i = 0x04; i != 0; i >>= 1)
T55xxWriteBit(Block & i);
// Now perform write (nominal is 5.6 ms for T55x7 and 18ms for E5550,
// Perform write (nominal is 5.6 ms for T55x7 and 18ms for E5550,
// so wait a little more)
FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 95); //125Khz
FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_ADC | FPGA_LF_ADC_READER_FIELD);
SpinDelay(20);
TurnReadLFOn(20 * 1000);
// field off
FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
cmd_send(CMD_ACK,0,0,0,0,0);
LED_A_OFF();
}
void TurnReadLFOn(int delay){
void TurnReadLFOn(int delay) {
FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_ADC | FPGA_LF_ADC_READER_FIELD);
// Give it a bit of time for the resonant antenna to settle.
SpinDelayUs(delay);
}
// Read one card block in page 0
void T55xxReadBlock(uint32_t Block, uint32_t Pwd, uint8_t PwdMode)
{
void T55xxReadBlock(uint32_t Block, uint32_t Pwd, uint8_t PwdMode) {
LED_A_ON();
uint32_t i = 0;
//make sure block is at max 7
@ -1234,18 +1234,16 @@ void T55xxReadBlock(uint32_t Block, uint32_t Pwd, uint8_t PwdMode)
T55xxWriteBit(0); //Page 0
if (PwdMode == 1){
// Pwd
// Send pwd
for (i = 0x80000000; i != 0; i >>= 1)
T55xxWriteBit(Pwd & i);
}
// zero bit to seperate
// Send a zero bit seperation
T55xxWriteBit(0);
// Block
for (i = 0x04; i != 0; i >>= 1) {
// Send block number
for (i = 0x04; i != 0; i >>= 1)
T55xxWriteBit(Block & i);
Dbprintf("ice %d",i);
}
// Turn field on to read the response
TurnReadLFOn(START_GAP);
@ -1256,14 +1254,18 @@ void T55xxReadBlock(uint32_t Block, uint32_t Pwd, uint8_t PwdMode)
// field off
FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
cmd_send(CMD_ACK,0,0,0,0,0);
LED_D_OFF();
LED_A_OFF();
}
// Read card traceability data (page 1)
void T55xxReadTrace(void){
LED_A_ON();
// Set up FPGA, 125kHz
LFSetupFPGAForADC(95, true);
LFSetupFPGAForADC(0, true);
// Trigger T55x7 in mode.
FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
SpinDelayUs(START_GAP);
@ -1280,7 +1282,7 @@ void T55xxReadTrace(void){
// field off
FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
cmd_send(CMD_ACK,0,0,0,0,0);
LED_D_OFF();
LED_A_OFF();
}