From dcd936a1da12a50a4084f4445d8ebbb080b5bc36 Mon Sep 17 00:00:00 2001 From: mwalker33 Date: Sat, 6 Jul 2019 15:20:25 +1000 Subject: [PATCH 1/1] Update lfops.c Fixed lf t55 reset --- armsrc/lfops.c | 22 ++++++++++------------ 1 file changed, 10 insertions(+), 12 deletions(-) diff --git a/armsrc/lfops.c b/armsrc/lfops.c index 4a7de24d..c6aecf0f 100644 --- a/armsrc/lfops.c +++ b/armsrc/lfops.c @@ -1201,11 +1201,13 @@ void CmdIOdemodFSK(int findone, int *high, int *low, int ledcontrol) /* // Original Timings for reference +//note startgap must be sent after tag has been powered up for more than 3ms (per T5557 ds) #define START_GAP 31*8 // was 250 // SPEC: 1*8 to 50*8 - typ 15*8 (or 15fc) #define WRITE_GAP 20*8 // was 160 // SPEC: 1*8 to 20*8 - typ 10*8 (or 10fc) #define WRITE_0 18*8 // was 144 // SPEC: 16*8 to 32*8 - typ 24*8 (or 24fc) #define WRITE_1 50*8 // was 400 // SPEC: 48*8 to 64*8 - typ 56*8 (or 56fc) 432 for T55x7; 448 for E5550 +#define READ_GAP 15*8 */ /* Q5 timing datasheet: @@ -1240,15 +1242,6 @@ void CmdIOdemodFSK(int findone, int *high, int *low, int ledcontrol) * Write_0 Fast Mode | 8*8 | 12*8 | 16*8 | * Write_1 Fast Mode | 24*8 | 28*8 | 32*8 | */ -/* -//note startgap must be sent after tag has been powered up for more than 3ms (per T5557 ds) -#define START_GAP 31*8 //31*8 // was 250 // SPEC: 1*8 to 50*8 - typ 15*8 (or 15fc) - T5557: 10*8 to 50*8 -#define WRITE_GAP 20*8 //20*8 // was 160 // SPEC: 1*8 to 20*8 - typ 10*8 (or 10fc) - T5557: 8*8 to 30*8 typ 50-150us -#define WRITE_0 18*8 //18*8 // was 144 // SPEC: 16*8 to 32*8 - typ 24*8 (or 24fc) - T5557: 16*8 to 31*8 typ 24*8 -#define WRITE_1 50*8 //50*8 // was 400 // SPEC: 48*8 to 64*8 - typ 56*8 (or 56fc) - T5557: 48*8 to 63*8 typ 54*8 432 for T55x7; 448 for E5550 - -#define READ_GAP 15*8 -*/ // Structure to hold Timing values. In future will be simplier to add user changable timings. typedef struct { @@ -1374,7 +1367,7 @@ void T55xx_SendCMD (uint32_t Data, uint32_t Block, uint32_t Pwd, uint8_t arg) { // Build Bit Stream to send. memset (BitStream,0x00,sizeof(BitStream)); - BitStreamLen = 0; + BitStreamLen = 0; // Ensure 0 bit index to start. // Add Leading 0 and 1 of 4 reference bit if ((downlink_mode == T55xx_DLMode_Leading0) || (downlink_mode == T55xx_DLMode_1of4)) @@ -1427,8 +1420,8 @@ void T55xx_SendCMD (uint32_t Data, uint32_t Block, uint32_t Pwd, uint8_t arg) { if (downlink_mode == T55xx_DLMode_LLR) T55xxWriteBit (T55xx_LongLeadingReference,Timing); // Send Long Leading Start Reference - if (downlink_mode == T55xx_DLMode_1of4) { // 1 of 4 need to send 2 bits at a time - for ( i = 0; i < BitStreamLen; i+=2 ) { + if (downlink_mode == T55xx_DLMode_1of4) { // 1 of 4 need to send 2 bits at a time + for ( i = 0; i < BitStreamLen-1; i+=2 ) { SendBits = (BitStream[BitStream_Byte(i )] >> (BitStream_Bit(i )) & 1) << 1; // Bit i SendBits += (BitStream[BitStream_Byte(i+1)] >> (BitStream_Bit(i+1)) & 1); // Bit i+1; T55xxWriteBit (SendBits & 3,Timing); @@ -1452,8 +1445,13 @@ void T55xxResetRead(void) { // Add in downlink_mode when ready // arg |= 0x00; // dlmode << 3 (00 default - 08 leading 0 - 10 Fixed - 18 1 of 4 ) + //clear buffer now so it does not interfere with timing later + BigBuf_Clear_keep_EM(); + T55xx_SendCMD (0, 0, 0, arg); //, true); + TurnReadLFOn(T55xx_Timing_FixedBit.READ_GAP); + // Acquisition DoPartialAcquisition(0, true, BigBuf_max_traceLen(), 0); -- 2.39.5