René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"QAPage","mainEntity":{"@type":"Question","name":"Problems with multiple files build.","text":"\u003cp dir=\"auto\"\u003eI am practicing in using multiple files in different locations, but my Arduino UNO rev3 freezes when I try to call functions located in an external file.\u003cbr\u003e\nHere is a minimum reproducible example:\u003c/p\u003e\n\u003cp dir=\"auto\"\u003e\u003cstrong\u003e.src/main.cpp\u003c/strong\u003e\u003c/p\u003e\n\u003cdiv class=\"snippet-clipboard-content notranslate position-relative overflow-auto\" data-snippet-clipboard-copy-content=\"#include \u0026quot;blink_main.h\u0026quot;\n#include \u0026lt;Arduino.h\u0026gt;\n#include \u0026lt;Arduino_FreeRTOS.h\u0026gt;\n#include \u0026lt;task.h\u0026gt;\n\n// Task parameters\nconst size_t STACK_SIZE_1000MS = 1024;\nconst uint8_t PRIORITY_1000MS = 2;\nTaskHandle_t xTaskHandle_1000ms;\nvoid task_1000ms(void * /*pVParameters*/);\n\nvoid setup() {\n\n  const uint16_t BAUDRATE = 9600;\n  Serial.begin(BAUDRATE);\n  while (!Serial) {\n    ;\n  };\n\n  // Task: 1000ms\n  BaseType_t xReturned1000ms;\n  xReturned1000ms = xTaskCreate(task_1000ms, \u0026quot;Task_1000ms\u0026quot;, STACK_SIZE_1000MS,\n                                NULL, PRIORITY_1000MS, \u0026amp;xTaskHandle_1000ms);\n\n  if (xReturned1000ms != pdPASS) {\n    char msg[] = \u0026quot;I cannot instantiate the 1000ms task.\u0026quot;;\n    Serial.println(msg);\n  }\n}\n\nvoid loop() {}\n\n// Task implementation\nvoid task_1000ms(void *pVParameters) {\n  (void)pVParameters;\n\n  /* Serial.println(\u0026quot;Check\u0026quot;); */\n  blink_main_init();\n\n  while (true) {\n    // Do nothing\n    // Task Schedule\n    const TickType_t X_DELAY = 1000 / portTICK_PERIOD_MS;\n    vTaskDelay(X_DELAY); // one tick delay (15ms)\n  }\n}\"\u003e\u003cpre class=\"notranslate\"\u003e\u003ccode class=\"notranslate\"\u003e#include \"blink_main.h\"\n#include \u0026lt;Arduino.h\u0026gt;\n#include \u0026lt;Arduino_FreeRTOS.h\u0026gt;\n#include \u0026lt;task.h\u0026gt;\n\n// Task parameters\nconst size_t STACK_SIZE_1000MS = 1024;\nconst uint8_t PRIORITY_1000MS = 2;\nTaskHandle_t xTaskHandle_1000ms;\nvoid task_1000ms(void * /*pVParameters*/);\n\nvoid setup() {\n\n  const uint16_t BAUDRATE = 9600;\n  Serial.begin(BAUDRATE);\n  while (!Serial) {\n    ;\n  };\n\n  // Task: 1000ms\n  BaseType_t xReturned1000ms;\n  xReturned1000ms = xTaskCreate(task_1000ms, \"Task_1000ms\", STACK_SIZE_1000MS,\n                                NULL, PRIORITY_1000MS, \u0026amp;xTaskHandle_1000ms);\n\n  if (xReturned1000ms != pdPASS) {\n    char msg[] = \"I cannot instantiate the 1000ms task.\";\n    Serial.println(msg);\n  }\n}\n\nvoid loop() {}\n\n// Task implementation\nvoid task_1000ms(void *pVParameters) {\n  (void)pVParameters;\n\n  /* Serial.println(\"Check\"); */\n  blink_main_init();\n\n  while (true) {\n    // Do nothing\n    // Task Schedule\n    const TickType_t X_DELAY = 1000 / portTICK_PERIOD_MS;\n    vTaskDelay(X_DELAY); // one tick delay (15ms)\n  }\n}\n\u003c/code\u003e\u003c/pre\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003e\u003cstrong\u003e./lib/blink/blink_main.h\u003c/strong\u003e\u003c/p\u003e\n\u003cdiv class=\"snippet-clipboard-content notranslate position-relative overflow-auto\" data-snippet-clipboard-copy-content=\"void blink_main_init(void);\"\u003e\u003cpre class=\"notranslate\"\u003e\u003ccode class=\"notranslate\"\u003evoid blink_main_init(void);\n\u003c/code\u003e\u003c/pre\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003e\u003cstrong\u003e./lib/blink/blink_main.cpp\u003c/strong\u003e\u003c/p\u003e\n\u003cdiv class=\"snippet-clipboard-content notranslate position-relative overflow-auto\" data-snippet-clipboard-copy-content=\"#include \u0026lt;Arduino.h\u0026gt;\n#include \u0026lt;Arduino_FreeRTOS.h\u0026gt;\n#include \u0026lt;semphr.h\u0026gt;\n\nstatic uint8_t blink_led_state;\nSemaphoreHandle_t mutex_blink_led_state;\n\n// Init\nvoid blink_main_init(void) {\n  Serial.println(\u0026quot;Inside the init.\u0026quot;);\n  mutex_blink_led_state = xSemaphoreCreateMutex();\n  /* Serial.println(\u0026quot;Mutex created.\u0026quot;); */\n  blink_led_state = 0;\n}\"\u003e\u003cpre class=\"notranslate\"\u003e\u003ccode class=\"notranslate\"\u003e#include \u0026lt;Arduino.h\u0026gt;\n#include \u0026lt;Arduino_FreeRTOS.h\u0026gt;\n#include \u0026lt;semphr.h\u0026gt;\n\nstatic uint8_t blink_led_state;\nSemaphoreHandle_t mutex_blink_led_state;\n\n// Init\nvoid blink_main_init(void) {\n  Serial.println(\"Inside the init.\");\n  mutex_blink_led_state = xSemaphoreCreateMutex();\n  /* Serial.println(\"Mutex created.\"); */\n  blink_led_state = 0;\n}\n\u003c/code\u003e\u003c/pre\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eIf I comment out   \u003ccode class=\"notranslate\"\u003eblink_main_init();\u003c/code\u003e, then the board does not get stuck.\u003cbr\u003e\nFor getting stuck I mean that the builtin led blinks at very high frequency and the serial port got stuck.\u003c/p\u003e","upvoteCount":1,"answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"\u003cp dir=\"auto\"\u003eSOLVED: I had to move \u003ccode class=\"notranslate\"\u003eblink_main_init(); \u003c/code\u003eoutside the function. I placed it just before \u003ccode class=\"notranslate\"\u003eBaseType_t xReturned1000ms;\u003c/code\u003e and now everything is working.\u003c/p\u003e","upvoteCount":1,"url":"https://github.com/feilipu/Arduino_FreeRTOS_Library/discussions/130#discussioncomment-8071895"}}}