diff options
Diffstat (limited to 'techlibs/ice40/tests/test_bram_tb.v')
| -rw-r--r-- | techlibs/ice40/tests/test_bram_tb.v | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/techlibs/ice40/tests/test_bram_tb.v b/techlibs/ice40/tests/test_bram_tb.v index ade53db0..abf95305 100644 --- a/techlibs/ice40/tests/test_bram_tb.v +++ b/techlibs/ice40/tests/test_bram_tb.v @@ -1,5 +1,6 @@ module bram_tb #( - parameter ABITS = 8, DBITS = 8 + parameter ABITS = 8, DBITS = 8, + parameter INIT_ADDR = 0, INIT_DATA = 0 ); reg clk; reg [ABITS-1:0] WR_ADDR; @@ -63,6 +64,9 @@ module bram_tb #( // $dumpfile("testbench.vcd"); // $dumpvars(0, bram_tb); + if (INIT_ADDR || INIT_DATA) + memory[INIT_ADDR] <= INIT_DATA; + xorshift64_next; xorshift64_next; xorshift64_next; @@ -85,7 +89,7 @@ module bram_tb #( WR_ADDR = getaddr(i < 256 ? i[7:4] : xorshift64_state[63:60]); xorshift64_next; - RD_ADDR = getaddr(i < 256 ? i[3:0] : xorshift64_state[59:56]); + RD_ADDR = i == 0 ? INIT_ADDR : getaddr(i < 256 ? i[3:0] : xorshift64_state[59:56]); WR_EN = xorshift64_state[55] && ((WR_ADDR & 'hff) != (RD_ADDR & 'hff)); xorshift64_next; |