From 7e7f4b471a17f8f9a3058cc5a0d4beab0a525525 Mon Sep 17 00:00:00 2001
From: Filipriec <filippriec@gmail.com>
Date: Thu, 6 Nov 2025 11:48:52 +0100
Subject: [PATCH] hod5b

---
 flake.nix     |  1 +
 hod5/main.cpp | 71 +++++++++++++++++++++------------------------------
 2 files changed, 30 insertions(+), 42 deletions(-)

diff --git a/flake.nix b/flake.nix
index 27ae7ff..17c297f 100644
--- a/flake.nix
+++ b/flake.nix
@@ -70,6 +70,7 @@
             echo "   - Target      : $MBED_TARGET"
             echo "   - Compiler    : ${armGcc}"
             echo "   - Commands    : mbed-tools, pyocd, openocd, st-flash"
+	    echo "probe-rs run --chip STM32U575ZITxQ cmake_build/NUCLEO_U575ZI_Q/develop/GCC_ARM/mbed-os-example-blinky.elf"
             echo
           '';
         };
diff --git a/hod5/main.cpp b/hod5/main.cpp
index db71cd0..d332446 100644
--- a/hod5/main.cpp
+++ b/hod5/main.cpp
@@ -1,60 +1,47 @@
 // main.cpp
-#include "mbed.h"
 
-#define MAXIMUM_BUFFER_SIZE 32
+/*
+ * Copyright (c) 2020 Arm Limited and affiliates.
+ * SPDX-License-Identifier: Apache-2.0
+ */
+#include "mbed.h"
 
 DigitalOut led1(LED1);
 DigitalOut led2(LED2);
-DigitalOut led3(LED3);
 DigitalIn  button(PC_13);
 
+Thread thread;
+#define MAXIMUM_BUFFER_SIZE 32
+
+volatile bool led_on = false;
+EventFlags flag;
+
 static BufferedSerial serial_port(USBTX, USBRX);
 
-int another_press(int press_num) {
-    press_num += 1;
-    if (press_num >= 8) {
-        press_num = 0;
-    };
+void led2_thread() {
+  serial_port.set_baud(9600);
+  serial_port.set_format(
+      /* bits */ 8,
+      /* parity */ BufferedSerial::None,
+      /* stop bit */ 1);
+  while (true) {
 
-    return press_num;
-}
+    if (uint32_t num = serial_port.read(buf, sizeof(buf))) {
+      // Echo the input back to the terminal.
+      serial_port.write(buf, num_presses);
+    }
 
-void set_led(int number) {
-    led1 = (number & 1) ? 1 : 0;
-    led2 = (number & 2) ? 1 : 0;
-    led3 = (number & 4) ? 1 : 0;
+    thread.start(led2_thread);
+    led2 = !led2;
+    ThisThread::sleep_for(1000);
+  }
 }
 
 int main()
 {
-    serial_port.set_baud(9600);
-    serial_port.set_format(
-        /* bits */ 8,
-        /* parity */ BufferedSerial::None,
-        /* stop bit */ 1
-    );
 
-    char buf[MAXIMUM_BUFFER_SIZE] = {0};
-
-    int num_presses = 0;
-    while (1) {
-        led1 = 0;
-        led2 = 0;
-        led3 = 0;
-
-        if (uint32_t num = serial_port.read(buf, sizeof(buf))) {
-          num_presses = another_press(num_presses);
-          set_led(num_presses);
-
-	  // Echo the input back to the terminal.
-	  serial_port.write(buf, num);
-
-          while (num == 0) {
-            ThisThread::sleep_for(10ms);
-          }
-
-        }
-
-        ThisThread::sleep_for(150ms);
+    while (true) {
+        led1 = !led1;
+        ThisThread::sleep_for(500);
     }
 }