Update pulsetest and regtest top-level files in light of wb_i2c_slave updates

b5ff33c9 · Theodor-Adrian Stana · d6aa4f02 · b5ff33c9 · b5ff33c9
Commit b5ff33c9 authored Apr 07, 2014 by Theodor-Adrian Stana
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Showing with 26 additions and 2 deletions

pulsetest.vhd top/pulsetest/pulsetest.vhd +13 -1

regtest.vhd top/regtest/regtest.vhd +13 -1

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--- a/top/pulsetest/pulsetest.vhd
+++ b/top/pulsetest/pulsetest.vhd
@@ -549,8 +549,20 @@ begin
  -- Set the I2C address signal according to ELMA protocol [1]
  i2c_addr <= "10" & fpga_ga_i;
-  -- Instantiate VBCP bridge component
+  -- Instantiate I2C bridge component
+  --
+  -- FSM watchdog timeout timer:
+  -- * consider bit period of 30 us
+  -- * 10 bits / byte transfer => 300 us
+  -- * 40 bytes in one transfer => 12000 us
+  -- * clk_i period = 50 ns => g_fsm_wdt = 12000 us / 50 ns = 240000
+  -- * multiply by two for extra safety => g_fsm_wdt = 480000
+  -- * Time to watchdog timeout: 480000 * 50ns = 24 ms
  cmp_i2c_bridge : wb_i2c_bridge
+    generic map
+    (
+      g_fsm_wdt => 480000
+    )
    port map
    (
      -- Clock, reset

--- a/top/regtest/regtest.vhd
+++ b/top/regtest/regtest.vhd
@@ -282,8 +282,20 @@ begin
  -- Set the I2C address signal according to ELMA protocol [1]
  i2c_addr <= "10" & fpga_ga_i;
-  -- Instantiate VBCP bridge component
+  -- Instantiate I2C bridge component
+  --
+  -- FSM watchdog timeout timer:
+  -- * consider bit period of 30 us
+  -- * 10 bits / byte transfer => 300 us
+  -- * 40 bytes in one transfer => 12000 us
+  -- * clk_i period = 50 ns => g_fsm_wdt = 12000 us / 50 ns = 240000
+  -- * multiply by two for extra safety => g_fsm_wdt = 480000
+  -- * Time to watchdog timeout: 480000 * 50ns = 24 ms
  cmp_i2c_bridge : wb_i2c_bridge
+    generic map
+    (
+      g_fsm_wdt => 480000
+    )
    port map
    (
      -- Clock, reset