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VME64x core
Commit 15926779 authored by Maciej Lipinski's avatar Maciej Lipinski Committed by Tristan Gingold
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[desc] small corrections to VME_IRQ_Controller.vhd file

parent f9505f15
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hdl/rtl/VME_IRQ_Controller.vhd
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......@@ -19,7 +19,7 @@
-- --> request of a service.
-- The Interrupt priority is specificated by the Master writing the
-- INT_Level register in the CR/CSR space
-- 3) The Interrupter Controller wait for the falling edge on the VME_IACKIN
-- 3) The Interrupter Controller waits for the falling edge on the VME_IACKIN
-- line.
-- 4) When detects VME_IACKIN_n_i = '0' and the Interrupt Handler initiates
-- the Interrupt cycle by asserting AS,the Interrupt Controller check if it
......@@ -30,7 +30,7 @@
-- during the interrupt acknowledge cycle should be equal or greater than
-- the size the it can respond with, and it shall receive a falling edge on
-- its IACKIN*.
-- 5) If it is the responding interrupter should send the source/ID on the
-- 5) If it is the responding interrupter, it should send the source/ID on the
-- VME_DATA lines (in our case the source/ID is the INT_Vector that the
-- Master can write in the corresponding register in the CR/CSR space) and
-- it terminates the interrupt cycle with an acknowledge before releasing
......@@ -39,7 +39,7 @@
--
-- All the output signals are registered
--
-- To implement the 5 phases before mentioned the follow FSM has been
-- To implement the above-mentioned 5 phases, the following FSM has been
-- implemented:
-- __________
-- |--| IACKOUT2 |<-|
......@@ -91,9 +91,9 @@
-- _______________________________________________________/\_________
--
-- To respect the time constraint indicated with the number 35 fig. 55 pag. 183
-- in the "VMEbus Specification" ANSI/IEEE STD1014-1987, is necessary to
-- generate the VME_AS1_n_i signal which is the AS signal not sampled, and
-- assign this signal to the s_IACKOUT signal when the fsm is in the IACKOUTx
-- in the "VMEbus Specification" ANSI/IEEE STD1014-1987, it is necessary to
-- generate the VME_AS1_n_i signal which is the AS signal that is not sampled,
-- and assign this signal to the s_IACKOUT signal when the fsm is in the IACKOUTx
-- state.
--
-- The LWORD* input is not used now, since this is a D08(O) Interrupter (see
......@@ -153,7 +153,7 @@ architecture Behavioral of VME_IRQ_Controller is
begin
irq_pending_o <= s_irq_pending;
-- Interrupts are automatically masked for g_RETRY_TIMEOUT (ie 1 ms) once
-- Interrupts are automatically masked for g_RETRY_TIMEOUT (i.e. 1 ms) once
-- they are acknowledge by the interrupt handler until they are deasserted
-- by the interrupter.
p_retry_fsm : process (clk_i)
......
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