diff options
Diffstat (limited to 'usrp2')
| -rw-r--r-- | usrp2/sdr_lib/dspengine_8to16.v | 30 |
1 files changed, 14 insertions, 16 deletions
diff --git a/usrp2/sdr_lib/dspengine_8to16.v b/usrp2/sdr_lib/dspengine_8to16.v index a0d2f7e7e..a8accee8b 100644 --- a/usrp2/sdr_lib/dspengine_8to16.v +++ b/usrp2/sdr_lib/dspengine_8to16.v @@ -42,8 +42,8 @@ module dspengine_8to16 localparam DSP_IDLE = 0; localparam DSP_PARSE_HEADER = 1; localparam DSP_READ = 2; - localparam DSP_WRITE_0 = 3; - localparam DSP_WRITE_1 = 4; + localparam DSP_WRITE_1 = 3; + localparam DSP_WRITE_0 = 4; localparam DSP_READ_TRAILER = 5; localparam DSP_WRITE_TRAILER = 6; localparam DSP_WRITE_HEADER = 7; @@ -65,8 +65,6 @@ module dspengine_8to16 reg [BUF_SIZE-1:0] read_adr, write_adr; reg has_trailer_reg; - wire last = (read_adr + 1) == (access_len - has_trailer_reg); - reg [31:0] new_header, new_trailer, trailer_mask; reg [15:0] length; reg wait_for_trailer; @@ -89,8 +87,8 @@ module dspengine_8to16 case(dsp_state) DSP_IDLE : begin - read_adr <= 0; - write_adr <= 0; + read_adr <= 1; // Skip 0 for transport header + write_adr <= 1; // Skip 0 for transport header if(access_ok) dsp_state <= DSP_PARSE_HEADER; end @@ -101,7 +99,7 @@ module dspengine_8to16 has_trailer_reg <= has_trailer; new_header[31:16] <= access_dat_i[31:16]; - new_header[15:0] <= access_len; + new_header[15:0] <= access_len-1; length <= access_len; hdr_length_reg <= hdr_length; if(~is_if_data | ~convert | ~has_trailer) @@ -110,10 +108,10 @@ module dspengine_8to16 dsp_state <= DSP_WRITE_HEADER; else begin - read_adr <= access_len-1; // point to trailer + read_adr <= access_len - 1; // point to trailer dsp_state <= DSP_READ_TRAILER; wait_for_trailer <= 0; - data_in_len <= access_len - hdr_length - 1; + data_in_len <= access_len - hdr_length - 2; end end @@ -125,7 +123,7 @@ module dspengine_8to16 new_trailer <= access_dat_i[31:0]; // Leave trailer unchanged odd <= access_dat_i[20] & access_dat_i[8]; data_out_len <= data_in_lenx2; - write_adr <= hdr_length_reg + data_in_lenx2; + write_adr <= hdr_length_reg + data_in_lenx2 + 1; end DSP_WRITE_TRAILER : @@ -133,7 +131,7 @@ module dspengine_8to16 dsp_state <= DSP_READ; write_adr <= write_adr - 1; read_adr <= read_adr - 1; - new_header[15:0] <= write_adr + 1; // length = addr of trailer + 1 + new_header[15:0] <= write_adr; // length = addr of trailer + 1 end DSP_READ : @@ -146,7 +144,7 @@ module dspengine_8to16 begin write_adr <= write_adr - 1; odd <= 0; - if(write_adr == hdr_length_reg) + if(write_adr == (hdr_length_reg+1)) dsp_state <= DSP_WRITE_HEADER; else if(odd) dsp_state <= DSP_READ; @@ -157,7 +155,7 @@ module dspengine_8to16 DSP_WRITE_0 : begin write_adr <= write_adr - 1; - if(write_adr == hdr_length_reg) + if(write_adr == (hdr_length_reg+1)) dsp_state <= DSP_WRITE_HEADER; else dsp_state <= DSP_READ; @@ -168,8 +166,8 @@ module dspengine_8to16 DSP_DONE : begin - read_adr <= 0; - write_adr <= 0; + read_adr <= 1; + write_adr <= 1; dsp_state <= DSP_IDLE; end endcase // case (dsp_state) @@ -184,7 +182,7 @@ module dspengine_8to16 (dsp_state == DSP_WRITE_0) | (dsp_state == DSP_WRITE_1); - assign access_dat_o = (dsp_state == DSP_WRITE_HEADER) ? { 4'h1, new_header } : + assign access_dat_o = (dsp_state == DSP_WRITE_HEADER) ? { 4'h0, new_header } : (dsp_state == DSP_WRITE_TRAILER) ? { 4'h2, new_trailer } : (dsp_state == DSP_WRITE_0) ? { 4'h0, i8_0, 8'd0, q8_0, 8'd0 } : (dsp_state == DSP_WRITE_1) ? { 4'h0, i8_1, 8'd0, q8_1, 8'd0 } : |