SPI: Fixed non-clocked SPI outputs in wrc_periph

The outputs to the SPI interface from wrc_periph were not clocked, which led to improper operation. This error was now fixed and everything seems to work fine.

SPI: Fixed non-clocked SPI outputs in wrc_periph
The outputs to the SPI interface from wrc_periph were not clocked, which led to improper operation. This error was now fixed and everything seems to work fine.
a29817e6 · Theodor-Adrian Stana · Grzegorz Daniluk · cc39f753 · a29817e6
Commit a29817e6 authored Nov 08, 2013 by Theodor-Adrian Stana Committed by Grzegorz Daniluk Jan 09, 2015
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wrc_periph.vhd modules/wrc_core/wrc_periph.vhd +21 -19

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--- a/modules/wrc_core/wrc_periph.vhd
+++ b/modules/wrc_core/wrc_periph.vhd
@@ -247,27 +247,29 @@ begin
  -------------------------------------
  p_drive_spi: process(clk_sys_i)
  begin
-    if rst_n_i = '0' then
-      spi_sclk_o  <= '0';
-      spi_mosi_o  <= '0';
-      spi_ncs_o   <= '1';
-    else
-      if(sysc_regs_o.gpsr_spi_sclk_load_o = '1' and sysc_regs_o.gpsr_spi_sclk_o = '1') then
-        spi_sclk_o <= '1';
-      elsif(sysc_regs_o.gpcr_spi_sclk_o = '1') then
-        spi_sclk_o <= '0';
-      end if;
+    if rising_edge(clk_sys_i) then
+      if rst_n_i = '0' then
+        spi_sclk_o  <= '0';
+        spi_mosi_o  <= '0';
+        spi_ncs_o   <= '1';
+      else
+        if(sysc_regs_o.gpsr_spi_sclk_load_o = '1' and sysc_regs_o.gpsr_spi_sclk_o = '1') then
+          spi_sclk_o <= '1';
+        elsif(sysc_regs_o.gpcr_spi_sclk_o = '1') then
+          spi_sclk_o <= '0';
+        end if;

-      if(sysc_regs_o.gpsr_spi_ncs_load_o = '1' and sysc_regs_o.gpsr_spi_ncs_o = '1') then
-        spi_ncs_o <= '1';
-      elsif(sysc_regs_o.gpcr_spi_cs_o = '1') then
-        spi_ncs_o <= '0';
-      end if;
+        if(sysc_regs_o.gpsr_spi_ncs_load_o = '1' and sysc_regs_o.gpsr_spi_ncs_o = '1') then
+          spi_ncs_o <= '1';
+        elsif(sysc_regs_o.gpcr_spi_cs_o = '1') then
+          spi_ncs_o <= '0';
+        end if;

-      if(sysc_regs_o.gpsr_spi_mosi_load_o = '1' and sysc_regs_o.gpsr_spi_mosi_o = '1') then
-        spi_mosi_o <= '1';
-      elsif(sysc_regs_o.gpcr_spi_mosi_o = '1') then
-        spi_mosi_o <= '0';
+        if(sysc_regs_o.gpsr_spi_mosi_load_o = '1' and sysc_regs_o.gpsr_spi_mosi_o = '1') then
+          spi_mosi_o <= '1';
+        elsif(sysc_regs_o.gpcr_spi_mosi_o = '1') then
+          spi_mosi_o <= '0';
+        end if;
      end if;
    end if;
  end process;