Fix directory structure, add config for debugging simple-uart-transmit on real HW

simple-uart-transmit/.gdbinit

+target extended-remote :3333
+set remote hardware-watchpoint-limit 2
+mon reset halt
+flushregs
+add-symbol-file ../esp32c3_rev3_rom.elf
+file ./firmware.elf
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simple-uart-transmit/.vscode/launch.json

+{
+    // Use IntelliSense to learn about possible attributes.
+    // Hover to view descriptions of existing attributes.
+    // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
+    "version": "0.2.0",
+    "configurations": [
+        {
+            "name": "Debug on real board",
+            "type": "gdb",
+            "request": "attach",
+            "cwd": "${workspaceRoot}",
+            "valuesFormatting": "parseText",
+            "target": "extended-remote 127.0.0.1:3333",
+            "executable": "./firmware.elf",
+            "autorun": [
+                "add-symbol-file ./firmware.elf",
+                "add-symbol-file ../esp32c3_rev3_rom.elf",
+                "set remote hardware-watchpoint-limit 2",
+                "mon reset halt",
+                "maintenance flush register-cache",
+            ],
+            "gdbpath": "riscv32-unknown-elf-gdb"
+        }
+    ]
+}
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src/simple-uart-transmit/Makefile → simple-uart-transmit/Makefile

+TOOLCHAIN=riscv32-unknown-elf
+EXTRA_CFLAGS ?= -Og -g
+
 SOURCES = main.c esp32-c3-uart-interface.c
 
 include $(MDK)/$(ARCH)/build.mk

simple-uart-transmit/debug-hw.sh

+#!/usr/bin/env bash
+set -eo pipefail
+
+# In case previous instance still lingers
+killall openocd || true
+
+make build
+
+# Use espressif's openocd for now
+source ../../esp-idf/export.sh
+openocd -f board/esp32c3-builtin.cfg -c "program_esp firmware.bin 0x10000 verify"
+OPENOCD_PID=$!
+_term() {
+  echo "Caught signal!" 
+  kill -TERM "$OPENOCD_PID"
+  killall openocd
+}
+trap _term SIGTERM
+trap _term SIGINT
+
+#dir=$(pwd)
+#echo "LAUNCHING GDB!"
+#riscv32-unknown-elf-gdb -x .gdbinit ./firmware.elf
\ No newline at end of file

src/simple-uart-transmit/main.c → simple-uart-transmit/main.c

@@ -6,9 +6,13 @@
 int main(void) {
   wdt_disable();
 
+ while(1){
+  delay_ms(1000);
   init_uart();
   config_uart();
   enable_uart_transmitter();
+  delay_ms(1000);
+ }
 
   return 0;
 }
\ No newline at end of file