diff options
Diffstat (limited to 'rtl/gfx/gfx_cmd.sv')
| -rw-r--r-- | rtl/gfx/gfx_cmd.sv | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/rtl/gfx/gfx_cmd.sv b/rtl/gfx/gfx_cmd.sv index 424cf5d..98845c9 100644 --- a/rtl/gfx/gfx_cmd.sv +++ b/rtl/gfx/gfx_cmd.sv @@ -15,13 +15,15 @@ module gfx_cmd output logic swap_buffers, enable_clear, + start_clear, output rgb24 clear_color ); struct packed { - logic[5:0] mbz; - logic enable_clear, + logic[4:0] mbz; + logic start_frame, + enable_clear, swap_buffers; rgb24 clear_color; } readdata_scan, writedata_scan; @@ -36,17 +38,21 @@ module gfx_cmd assign cmd_readdata = readdata_scan; rgb24 next_clear_color; - logic next_enable_clear, next_swap_buffers; + logic next_start_clear, next_enable_clear, next_swap_buffers; always_ff @(posedge clk or negedge rst_n) if (!rst_n) begin + start_clear <= 0; enable_clear <= 0; swap_buffers <= 0; + next_start_clear <= 0; next_enable_clear <= 0; next_swap_buffers <= 0; end else begin + start_clear <= 0; if (vsync) begin + start_clear <= next_start_clear; enable_clear <= next_enable_clear; swap_buffers <= next_swap_buffers; end @@ -54,6 +60,9 @@ module gfx_cmd if (cmd_write) begin next_enable_clear <= writedata_scan.enable_clear; next_swap_buffers <= writedata_scan.swap_buffers; + + if (!next_start_clear) + next_start_clear <= writedata_scan.start_frame && writedata_scan.enable_clear; end end |