github/RRG-Proxmark3
1
0
Fork 0
mirror of https://github.com/RfidResearchGroup/proxmark3.git synced 2025-08-19 21:03:48 -07:00
Code Issues Projects Releases Packages Wiki Activity Actions 4

Added some comments

Browse source
This commit is contained in:
iceman1001 2017-01-26 14:23:48 +01:00
commit 496b673453
1 changed files with 7 additions and 2 deletions
Download patch file Download diff file Expand all files Collapse all files

9
fpga/hi_simulate.v
View file

@ -53,6 +53,11 @@ end
// Divide 13.56 MHz by 32 to produce the SSP_CLK // Divide 13.56 MHz by 32 to produce the SSP_CLK
// The register is bigger to allow higher division factors of up to /128 // The register is bigger to allow higher division factors of up to /128
// FPGA_HF_SIMULATOR_NO_MODULATION (0<<0) // 0000
// FPGA_HF_SIMULATOR_MODULATE_BPSK (1<<0) // 0001
// FPGA_HF_SIMULATOR_MODULATE_212K (2<<0) // 0010
// FPGA_HF_SIMULATOR_MODULATE_424K (4<<0) // 0100
// FPGA_HF_SIMULATOR_MODULATE_424K_8BIT 0x5 // 0101
reg [10:0] ssp_clk_divider; reg [10:0] ssp_clk_divider;
always @(posedge adc_clk) always @(posedge adc_clk)
@ -86,8 +91,8 @@ end
// Divide SSP_CLK by 8 to produce the byte framing signal; the phase of // Divide SSP_CLK by 8 to produce the byte framing signal; the phase of
// this is arbitrary, because it's just a bitstream. // this is arbitrary, because it's just a bitstream.
// One nasty issue, though: I can't make it work with both rx and tx at // One nasty issue, though: I can't make it work with both rx and tx at
// once. The phase wrt ssp_clk must be changed. TODO to find out why // once. The phase wrt ssp_clk must be changed.
// that is and make a better fix. // TODO to find out why that is and make a better fix.
reg [2:0] ssp_frame_divider_to_arm; reg [2:0] ssp_frame_divider_to_arm;
always @(posedge ssp_clk) always @(posedge ssp_clk)
ssp_frame_divider_to_arm <= (ssp_frame_divider_to_arm + 1); ssp_frame_divider_to_arm <= (ssp_frame_divider_to_arm + 1);