going to be adding verilator save/restore state

however the simulated-uart will be in some unknown state at the time,
on restore.  as a "cheat", only save when the tx and rx state machines
are both in IDLE

diff --git a/verilator/uart-verilator.c b/verilator/uart-verilator.c
index 8492a117cd718e4285239e827aec87e23be18b8b..0346f6be6761d5d010b542e7d81a6039e9db7c9e 100644 (file)
--- a/verilator/uart-verilator.c
+++ b/verilator/uart-verilator.c
@@ -251,3 +251,11 @@ unsigned char uart_rx(void)
 
        return rx;
 }
+
+// cheating, here: to avoid having to save the uart state, check if it
+// is idle (both tx and rx)
+bool uart_idle(void)
+{
+       return (tx_state == IDLE && rx_state == IDLE);
+}
+