diff options
| author | Josh Blum <josh@joshknows.com> | 2012-07-15 22:50:19 -0700 |
|---|---|---|
| committer | Josh Blum <josh@joshknows.com> | 2012-07-15 22:50:19 -0700 |
| commit | 38ec062b628e39397999d86fb3a68438aa586d5a (patch) | |
| tree | 02470f7ff3b217da5a3ca126800dacbcbe5a04f1 /usrp2/gpmc | |
| parent | 90f9cddd68f2a631c945a9fd7ef39395e1ba526e (diff) | |
| download | uhd-38ec062b628e39397999d86fb3a68438aa586d5a.tar.gz uhd-38ec062b628e39397999d86fb3a68438aa586d5a.tar.bz2 uhd-38ec062b628e39397999d86fb3a68438aa586d5a.zip | |
e100: offset gpmc to fifo writes by 2 transfers
This effectivly works around bus initial transaction issues.
Diffstat (limited to 'usrp2/gpmc')
| -rw-r--r-- | usrp2/gpmc/gpmc_to_fifo.v | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/usrp2/gpmc/gpmc_to_fifo.v b/usrp2/gpmc/gpmc_to_fifo.v index 4aa55953a..cfc5aaa8b 100644 --- a/usrp2/gpmc/gpmc_to_fifo.v +++ b/usrp2/gpmc/gpmc_to_fifo.v @@ -70,9 +70,9 @@ module gpmc_to_fifo case(gpmc_state) GPMC_STATE_START: begin - if (EM_A == 0) begin + if (EM_A == 2) begin gpmc_state <= GPMC_STATE_FILL; - last_addr <= {EM_D[ADDR_WIDTH-2:0], 1'b0} - 1'b1; + last_addr <= {EM_D[ADDR_WIDTH-2:0], 1'b0} - 1'b1 + 2; next_gpmc_ptr <= gpmc_ptr + 1; end end @@ -116,14 +116,14 @@ module gpmc_to_fifo if (reset | clear) begin fifo_state <= FIFO_STATE_CLAIM; fifo_ptr <= 0; - counter <= 0; + counter <= 2; end else begin case(fifo_state) FIFO_STATE_CLAIM: begin if (bram_available_to_empty) fifo_state <= FIFO_STATE_EMPTY; - counter <= 0; + counter <= 2; end FIFO_STATE_EMPTY: begin |