CI: Add ESP32-C3 QEMU support (#914)

* CI: ESP32-C3: QEMU support

* CI: ESP32C3: Script for preparing and running

* CI: gitignore qemu.log

* ESP32-C3: Example sw_and_hw output

examples/esp32c3/.cargo/config.toml

@@ -1,5 +1,9 @@
 [target.riscv32imc-unknown-none-elf]
-runner = "espflash flash --monitor"
+# Real hardware
+#runner = "espflash flash --monitor"
+
+# QEMU emulator
+runner = "./runner.sh"
 
 [build]
 rustflags = [

examples/esp32c3/runner.sh

@@ -0,0 +1,29 @@
+#!/bin/bash
+
+if [ $# -eq 0 ]
+  then
+    echo "No arguments supplied! Provide path to ELF as argument"
+fi
+
+outputfilenamecargo=$1
+outputfilename="$outputfilenamecargo".bin
+
+logfile=qemu.log
+
+qemuexec=qemu-system-riscv32
+
+# Building ESP32-C3 image
+espflash save-image --chip esp32c3 --merge "$outputfilenamecargo" "$outputfilename" 1>&2
+
+# Get stats
+esptool.py image_info --version 2 "$outputfilename" 1>&2
+
+# Run in QEMU
+$qemuexec -nographic -monitor tcp:127.0.0.1:55555,server,nowait -icount 3 -machine esp32c3 -drive file="$outputfilename",if=mtd,format=raw  -serial file:"$logfile" &
+
+# Let it run
+sleep 3s
+
+# Kill QEMU nicely by sending 'q' (quit) over tcp
+echo q | nc -N 127.0.0.1 55555
+cat "$logfile"