From a75d42faebbfc8d44ee0c0bb5ce944058c1eee4d Mon Sep 17 00:00:00 2001
From: Erick Ahmed <engineering@erickahmed.com>
Date: Sun, 14 Jun 2026 15:16:23 +0200
Subject: [PATCH] Create context structure for timer callback

Strucure is made of
-  LED (port, pin)
- Semaphore
- Timer handle
---
 Core/Src/canlog.c |  1 -
 Core/Src/main.c   | 15 +++++++++++++++
 2 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/Core/Src/canlog.c b/Core/Src/canlog.c
index 784e805..5164a5a 100644
--- a/Core/Src/canlog.c
+++ b/Core/Src/canlog.c
@@ -141,7 +141,6 @@ void vLEDHeartbeat(void *argument)
   {
       HAL_GPIO_WritePin(led->port, led->pin, GPIO_PIN_RESET);
   }
-
   /* CODE END */
 }
 /* END vLEDHeartbeat */
diff --git a/Core/Src/main.c b/Core/Src/main.c
index e67881e..13e4cae 100644
--- a/Core/Src/main.c
+++ b/Core/Src/main.c
@@ -41,6 +41,12 @@ typedef struct {
     //uint32_t timestamp; //Enable TIM2: 42 MHz / (41+1) = 1 MHz → 1 µs tick; 32bit autoreload freerunning
     // this is for getting timestamps on can messages
 } CanMessage_t;
+
+typedef struct {
+    LED_Config *led;
+    osSemaphoreId_t sem;
+    osTimerId_t timer;
+} LEDContext;
 /* USER CODE END PTD */
 
 /* Private define ------------------------------------------------------------*/
@@ -66,6 +72,9 @@ LED_Config led_can1 = {GPIOB, GPIO_PIN_2};
 LED_Config led_can2 = {GPIOB, GPIO_PIN_5};
 LED_Config led_error = {GPIOB, GPIO_PIN_3};
 
+LEDContext ledCtxCAN1;
+LEDContext ledCtxCAN2;
+
 osSemaphoreId_t xLEDSemaphoreCAN1;
 osSemaphoreId_t xLEDSemaphoreCAN2;
 
@@ -109,7 +118,13 @@ int main(void)
   HAL_Init();
 
   /* USER CODE BEGIN Init */
+  ledCtxCAN1.led = &led_can1;
+  ledCtxCAN1.sem = xLEDSemaphoreCAN1;
+  ledCtxCAN1.timer = xHeartbeatTimerCAN1;
 
+  ledCtxCAN2.led = &led_can2;
+  ledCtxCAN2.sem = xLEDSemaphoreCAN2;
+  ledCtxCAN2.timer = xHeartbeatTimerCAN2;
   /* USER CODE END Init */
 
   /* Configure the system clock */