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| author | matt | 2008-09-17 00:14:24 +0000 |
|---|---|---|
| committer | matt | 2008-09-17 00:14:24 +0000 |
| commit | 2853848d37a3f70ffc7527fdaf8bf13993c703dd (patch) | |
| tree | 34beb2de69fdffaa168ab2340f3a9dc352d62597 /usrp2/fpga/control_lib/sd_spi_wb.v | |
| parent | ad482436a7c9e97f4bc1f7407dccd85a4cade6c5 (diff) | |
| download | gnuradio-2853848d37a3f70ffc7527fdaf8bf13993c703dd.tar.gz gnuradio-2853848d37a3f70ffc7527fdaf8bf13993c703dd.tar.bz2 gnuradio-2853848d37a3f70ffc7527fdaf8bf13993c703dd.zip | |
control CS line on SD card
git-svn-id: http://gnuradio.org/svn/gnuradio/trunk@9589 221aa14e-8319-0410-a670-987f0aec2ac5
Diffstat (limited to 'usrp2/fpga/control_lib/sd_spi_wb.v')
| -rw-r--r-- | usrp2/fpga/control_lib/sd_spi_wb.v | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/usrp2/fpga/control_lib/sd_spi_wb.v b/usrp2/fpga/control_lib/sd_spi_wb.v index 53036d363..7a6258b56 100644 --- a/usrp2/fpga/control_lib/sd_spi_wb.v +++ b/usrp2/fpga/control_lib/sd_spi_wb.v @@ -34,6 +34,10 @@ module sd_spi_wb reg [7:0] clkdiv; wire ready; reg ack_d1; + + reg cs_reg; + assign sd_csn = ~cs_reg; // FIXME + always @(posedge clk) if(rst) ack_d1 <= 0; else ack_d1 <= wb_ack_o; @@ -51,8 +55,14 @@ module sd_spi_wb endcase // case(wb_adr_i) always @(posedge clk) - if(wb_we_i & wb_stb_i & wb_cyc_i & wb_ack_o) + if(rst) + begin + clkdiv <= 200; + cs_reg <= 0; + end + else if(wb_we_i & wb_stb_i & wb_cyc_i & wb_ack_o) case(wb_adr_i) + ADDR_STATUS : cs_reg <= wb_dat_i; ADDR_CLKDIV : clkdiv <= wb_dat_i; endcase // case(wb_adr_i) |