commit

lab3-1_one_sem_clk/main/CMakeLists.txt

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+idf_component_register(
+            SRC_DIRS "." 
+            INCLUDE_DIRS ".")

lab3-1_one_sem_clk/main/component.mk

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+COMPONENT_SRCDIRS := .
+COMPONENT_ADD_INCLUDEDIRS := .

lab3-1_one_sem_clk/main/main.c

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+/****************************************************************************
+ * Copyright (C) 2020 by Fabrice Muller                                     *
+ *                                                                          *
+ * This file is useful for ESP32 Design course.                             *
+ *                                                                          *
+ ****************************************************************************/
+
+/**
+ * @file lab3-1_main.c
+ * @author Fabrice Muller
+ * @date 20 Oct. 2020
+ * @brief File containing the lab3-1 of Part 3.
+ *
+ * @see https://github.com/fmuller-pns/esp32-vscode-project-template
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <string.h>
+#include "esp_log.h"
+
+/* FreeRTOS.org includes. */
+#include "freertos/FreeRTOSConfig.h"
+#include "freertos/FreeRTOS.h"
+#include "freertos/task.h"
+#include "freertos/semphr.h"
+
+#include "my_helper_fct.h"
+
+static const char* TAG = "SEM";
+
+/* Application constants */
+#define STACK_SIZE     4096
+#define TABLE_SIZE     400
+
+/* Task Priority */
+const uint32_t TIMER_TASK_PRIORITY = 5;
+const uint32_t INC_TABLE_TASK_PRIORITY = 4;
+const uint32_t DEC_TABLE_TASK_PRIORITY = 4;
+
+/* Communications */
+SemaphoreHandle_t xSemClk;
+
+/* Tasks */
+void vTaskTimer(void *pvParameters);
+void vTaskIncTable(void *pvParameters);
+void vTaskDecTable(void *pvParameters);
+
+/* Datas */
+int Table[TABLE_SIZE];
+
+
+/* Main function */
+void app_main(void) {
+
+	/* Init Table */
+	memset(Table, 0, TABLE_SIZE*sizeof(int));
+
+	/* Create semaphore */
+xSemClk = xSemaphoreCreateBinary();
+if (xSemClk == NULL) {
+	ESP_LOGE(TAG, "Error xSemClk cannot be created");
+	vTaskDelete(NULL);
+}
+
+
+	/* Stop scheduler */
+	vTaskSuspendAll();
+
+	/* Create Tasks */
+xTaskCreatePinnedToCore(vTaskTimer,"Timer", STACK_SIZE, NULL, TIMER_TASK_PRIORITY, NULL,CORE_0) ;
+
+	/* Continue scheduler */
+	xTaskResumeAll();
+
+	/* to ensure its exit is clean */
+	vTaskDelete(NULL);
+}
+/*-----------------------------------------------------------*/
+
+	
+
+void vTaskTimer(void *pvParameters) {
+TickType_t xLastWakeTime =xTaskGetTickCount();
+for(;;){
+	vTaskDelayUntil(&xLastWakeTime, pdMS_TO_TICKS(250UL));
+	COMPUTE_IN_TIME_MS(20);
+	DISPLAY("Task Timer : give sem Clk");
+	xSemaphoreGive(xSemClk); 
+	}
+
+}
+
+void vTaskIncTable(void *pvParameters) {
+int index; 	
+int NbActivations = 0;
+uint32_t constNumber = ((uint32_t *)pvParameters);
+for(;;){
+	//Wait on clk
+
+	xSemaphoreTake(xSemClk, portMAX_DELAY);
+	DISPLAY ("TASK IncTable is running");
+	if (NbActivations ==0) {
+		DISPLAY ("TASK IncTable is starting computation");
+		for (index = 0 ; index < TABLE_SIZE; index++)
+			Table[index] = Table[index] + constNumber;
+	
+	COMPUTE_IN_TIME_MS(50);
+	NbActivations = 4;
+	}
+	else {
+		NbActivations = NbActivations - 1;
+	}
+}
+
+
+}
+
+void vTaskDecTable(void *pvParameters) {
+	int index; 	
+	for(;;){
+
+
+			for (index = 0 ; index < TABLE_SIZE; index++)
+			Table[index] = Table[index] + 1;
+	COMPUTE_IN_TIME_MS(50);
+	}
+
+}
+
+

lab3-1_one_sem_clk/main/my_helper_fct.h

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+#ifndef _MY_HELPER_FCT_
+#define _MY_HELPER_FCT_
+
+#include <unistd.h>
+#include "esp_log.h"
+
+
+/* Core constants fot xTaskCreatePinnedToCore() function */
+const uint32_t CORE_0 = 0;
+const uint32_t CORE_1 = 1;
+const uint32_t PRO_CPU = 0;
+const uint32_t APP_CPU = 1;
+
+/**
+ * @brief Macro to display the buffer with arguments. msg is a formatted string as printf() function.
+ * 
+ */
+#define DISPLAY(msg, ...) printf("%d:%d>\t"msg"\r\n", xTaskGetTickCount(), xPortGetCoreID(), ##__VA_ARGS__);
+
+
+/**
+ * @brief Macro to display error/warning/info for the buffer with arguments. msg is a formatted string as printf() function.
+ * 
+ */
+#define DISPLAYE(tag, msg, ...) ESP_LOGE(tag, "%d:%d>\t"msg"", xTaskGetTickCount(), xPortGetCoreID(), ##__VA_ARGS__);
+
+#define DISPLAYW(tag, msg, ...) ESP_LOGW(tag, "%d:%d>\t"msg"", xTaskGetTickCount(), xPortGetCoreID(), ##__VA_ARGS__);
+
+#define DISPLAYI(tag, msg, ...) ESP_LOGI(tag, "%d:%d>\t"msg"", xTaskGetTickCount(), xPortGetCoreID(), ##__VA_ARGS__);
+
+/**
+ * @brief Macro to display the buffer without argument
+ * 
+ */
+#define DISPLAYB(msg) printf("%d:%d>\t", xTaskGetTickCount(), xPortGetCoreID());\
+	printf(msg);\
+	printf("\r\n");
+
+
+/* Consume CPU cycles. Time parameter is for the default frequency: 160MHz (ESP32_DEFAULT_CPU_FREQ_MHZ=160) */
+#define COMPUTE_IN_TIME_US(time_us) {register uint32_t i=(uint32_t)time_us*5.02*100/22; while (i-- > 0) {asm(" nop");}}
+
+#define COMPUTE_IN_TIME_MS(time_ms) {register uint32_t i=(uint32_t)time_ms*1000*5.02*100/22; while (i-- > 0) {asm(" nop");}} 
+
+#define COMPUTE_IN_TICK(tick) {register uint32_t i=(uint32_t)(tick*1000/configTICK_RATE_HZ)*1000*5.02*100/22; while (i-- > 0) {asm(" nop");}} 
+
+#endif