diff options
| author | matt <matt@221aa14e-8319-0410-a670-987f0aec2ac5> | 2008-09-17 00:14:48 +0000 |
|---|---|---|
| committer | matt <matt@221aa14e-8319-0410-a670-987f0aec2ac5> | 2008-09-17 00:14:48 +0000 |
| commit | d81d35f7f833a3d1e24c353a5f56189dc6c919c5 (patch) | |
| tree | e6b856a7bb1e2914d0b254f43054e1cd7b59e41a /usrp2 | |
| parent | 2853848d37a3f70ffc7527fdaf8bf13993c703dd (diff) | |
allow fpga to take over SD card interface
git-svn-id: http://gnuradio.org/svn/gnuradio/trunk@9590 221aa14e-8319-0410-a670-987f0aec2ac5
Diffstat (limited to 'usrp2')
| -rwxr-xr-x | usrp2/fpga/boot_cpld/boot_cpld.v | 17 |
1 files changed, 13 insertions, 4 deletions
diff --git a/usrp2/fpga/boot_cpld/boot_cpld.v b/usrp2/fpga/boot_cpld/boot_cpld.v index 3c53a79928..1769f7c03b 100755 --- a/usrp2/fpga/boot_cpld/boot_cpld.v +++ b/usrp2/fpga/boot_cpld/boot_cpld.v @@ -47,6 +47,15 @@ module boot_cpld assign CPLD_CLK = CFG_CCLK; assign DEBUG[8:0] = { CLK_25MHZ, SD_nCS, SD_CLK, SD_Din, CFG_CCLK, CFG_PROG_B, CFG_INIT_B, CFG_DONE, CFG_Din}; + + // Handle cutover to FPGA control of SD + wire fpga_takeover = ~CPLD_misc; + wire SD_CLK_int, SD_nCS_int, SD_Din_int, CFG_Din_int; + + assign SD_CLK = fpga_takeover ? START : SD_CLK_int; + assign SD_nCS = fpga_takeover ? MODE : SD_nCS_int; + assign SD_Din = fpga_takeover ? DONE : SD_Din_int; + assign CFG_Din = fpga_takeover ? SD_Dout : CFG_Din_int; spi_boot #(.width_set_sel_g(4), // How many sets (16) .width_bit_cnt_g(6), // Block length (12 is faster, 6 is minimum) @@ -61,10 +70,10 @@ module boot_cpld .reset_i(POR), // To SD Card - .spi_clk_o(SD_CLK), - .spi_cs_n_o(SD_nCS), + .spi_clk_o(SD_CLK_int), + .spi_cs_n_o(SD_nCS_int), .spi_data_in_i(SD_Dout), - .spi_data_out_o(SD_Din), + .spi_data_out_o(SD_Din_int), .spi_en_outs_o(en_outs), // Data Port @@ -79,7 +88,7 @@ module boot_cpld .cfg_init_n_i(CFG_INIT_B), .cfg_done_i(CFG_DONE), .cfg_clk_o(CFG_CCLK), - .cfg_dat_o(CFG_Din) + .cfg_dat_o(CFG_Din_int) ); endmodule // boot_cpld |