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Fix backpressure issue

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This commit is contained in:
Alex Forencich 2019-03-07 17:45:25 -08:00
parent 4d628c9171
commit e71a62e6a1
1 changed files with 12 additions and 8 deletions
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20
rtl/axi_dma_wr.v
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@ -440,16 +440,20 @@ always @* begin
end
end
m_axi_awaddr_next = addr_reg;
m_axi_awlen_next = output_cycle_count_next;
m_axi_awvalid_next = s_axis_write_data_tvalid || !first_cycle_reg;
if (!m_axi_awvalid_reg) begin
m_axi_awaddr_next = addr_reg;
m_axi_awlen_next = output_cycle_count_next;
m_axi_awvalid_next = s_axis_write_data_tvalid || !first_cycle_reg;
if (m_axi_awvalid_next) begin
addr_next = addr_reg + tr_word_count_next;
op_word_count_next = op_word_count_reg - tr_word_count_next;
if (m_axi_awvalid_next) begin
addr_next = addr_reg + tr_word_count_next;
op_word_count_next = op_word_count_reg - tr_word_count_next;
s_axis_write_data_tready_next = m_axi_wready_int_early && input_active_next;
state_next = STATE_WRITE;
s_axis_write_data_tready_next = m_axi_wready_int_early && input_active_next;
state_next = STATE_WRITE;
end else begin
state_next = STATE_START;
end
end else begin
state_next = STATE_START;
end