Commit e60bd33b authored by Ille, Ondrej, Ing.'s avatar Ille, Ondrej, Ing.

test: Debug Error rules A.

Check must be done immediately, otherwise another error frame
might screw REC value and it can be off by 8!
parent 14722a48
......@@ -193,9 +193,19 @@ package body error_rules_a_feature is
wait for 20 ns;
CAN_wait_bus_idle(ID_1, mem_bus(1));
CAN_wait_bus_idle(ID_2, mem_bus(2));
wait for 20 ns; -- To update error counters!
-- We need to check right away, not when node becomes idle! The reason
-- is:
-- When forcing recessive, Node 2 is already in Error delimiter and
-- it will therefore finish its error delimiter and go idle during the
-- time of Active error flag of Node 1 which we force Recessive.
-- So at time when we release the bus and Node 1 finally transmitts its
-- Active Error flag, Node 2 will already accept this as SOF, detect
-- Stuff Error and will transmitt error frame! Due to this Node 1 will
-- increment its REC by 8 because it detected Dominant bit after sending
-- Active Error flag. So when we would wait until idle, REC of Node 1
-- would be higher by 8 due to that detected dominant bit!
read_error_counters(err_counters_3, ID_1, mem_bus(1));
check(err_counters_2.rx_counter + 129 = err_counters_3.rx_counter,
"RX counter incremented by 8 for each recessive during error flag! " &
......@@ -204,6 +214,9 @@ package body error_rules_a_feature is
check(err_counters_2.tx_counter = err_counters_3.tx_counter,
"TX counter unchanged in Receiver!");
CAN_wait_bus_idle(ID_1, mem_bus(1));
CAN_wait_bus_idle(ID_2, mem_bus(2));
end procedure;
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