From e58a4c12191abd3b910e34842ada9b23590a708b Mon Sep 17 00:00:00 2001
From: Michel Pollet <buserror@gmail.com>
Date: Thu, 4 May 2017 11:15:41 +0100
Subject: [PATCH] vcd: Decrease the VCD resolution
From about 1GHz to 100MHz. Shouldn't have an impact on simavr proper,
but might help with Pulseview
Signed-off-by: Michel Pollet <buserror@gmail.com>
---
simavr/sim/sim_vcd_file.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/simavr/sim/sim_vcd_file.c b/simavr/sim/sim_vcd_file.c
index f0d80be..246ae7c 100644
--- a/simavr/sim/sim_vcd_file.c
+++ b/simavr/sim/sim_vcd_file.c
@@ -398,8 +398,8 @@ avr_vcd_flush_log(
while (!avr_vcd_fifo_isempty(&vcd->log)) {
avr_vcd_log_t l = avr_vcd_fifo_read(&vcd->log);
- // 1ns base
- uint64_t base = avr_cycles_to_nsec(vcd->avr, l.when - vcd->start);
+ // 10ns base -- 100MHz should be enough
+ uint64_t base = avr_cycles_to_nsec(vcd->avr, l.when - vcd->start) / 10;
/*
* if that trace was seen in this nsec already, we fudge the
@@ -525,7 +525,7 @@ avr_vcd_start(
return -1;
}
- fprintf(vcd->output, "$timescale 1ns $end\n"); // 1ns base
+ fprintf(vcd->output, "$timescale 10ns $end\n"); // 10ns base, aka 100MHz
fprintf(vcd->output, "$scope module logic $end\n");
for (int i = 0; i < vcd->signal_count; i++) {
--
2.39.5