diff options
| author | henryk <henryk@6dc7ffe9-61d6-0310-9af1-9938baff3ed1> | 2007-12-12 01:50:14 +0000 |
|---|---|---|
| committer | henryk <henryk@6dc7ffe9-61d6-0310-9af1-9938baff3ed1> | 2007-12-12 01:50:14 +0000 |
| commit | 202b56a42c5e6a171ee43b469be48525d0e8e350 (patch) | |
| tree | 84260eadbedd8575f158b95a43c3a481c35362ec /openpicc/application/tc_fdt.c | |
| parent | 3d0e1db9d118f85441a9d559ba2fa7baa7195eee (diff) | |
Add new miller decoder (not working yet)
Vastly improve timing through CPU cycle counting. Jitter is now like 40ns (the SSC_DATA edge detection fuzziness) in 2 main clusters 4 CPU cycles (83ns) apart, plus an occasional glitch adding 4 CPU cycles in either direction
git-svn-id: https://svn.openpcd.org:2342/trunk@385 6dc7ffe9-61d6-0310-9af1-9938baff3ed1
Diffstat (limited to 'openpicc/application/tc_fdt.c')
| -rw-r--r-- | openpicc/application/tc_fdt.c | 12 |
1 files changed, 4 insertions, 8 deletions
diff --git a/openpicc/application/tc_fdt.c b/openpicc/application/tc_fdt.c index 7413e11..2a306ef 100644 --- a/openpicc/application/tc_fdt.c +++ b/openpicc/application/tc_fdt.c @@ -50,16 +50,12 @@ void tc_fdt_set(u_int16_t count) tcfdt->TC_RA = count; } -void __ramfunc tc_fdt_set_to_next_slot(int last_bit) +int tc_fdt_get_next_slot(int reference_time, int slotlen) { - int reference_time; - if(last_bit == 0) reference_time = ISO14443A_FDT_OFFSET_0; - else reference_time = ISO14443A_FDT_OFFSET_1; - - if(tcfdt->TC_SR & AT91C_TC_CLKSTA) + /*if(tcfdt->TC_SR & AT91C_TC_CLKSTA) while(tcfdt->TC_CV != 0xFFFF && (tcfdt->TC_CV - reference_time) % 128 != 0); - tcfdt->TC_CCR = AT91C_TC_SWTRG; - tc_fdt_set(2*128); + tcfdt->TC_CCR = AT91C_TC_SWTRG;*/ + return tcfdt->TC_CV + (slotlen-((tcfdt->TC_CV - reference_time) % slotlen)) + 3*slotlen; } |