#1 circbuffer vava

firmware/Core/Inc/circ_buffer.h

@@ -0,0 +1,37 @@
+/*
+ * circ_buffer.h
+ *
+ *  Created on: 16 มี.ค. 2569
+ *      Author: pkuna
+ */
+
+#ifndef INC_CIRC_BUFFER_H_
+#define INC_CIRC_BUFFER_H_
+
+#include <stdio.h>
+#include <stdint.h>
+#include <stdbool.h>
+
+typedef struct {
+	uint8_t * const buffer;
+	int head;
+	int tail;
+	const int maxLen;
+} circularBuffer;
+
+#define circBuffDef(buff, size)                	\
+    uint8_t buff##_data_space[size];           	\
+    circularBuffer buff = {						\
+        .buffer = buff##_data_space,         	\
+        .head = 0,                        		\
+        .tail = 0,                        		\
+        .maxLen = size                       	\
+    }
+
+extern circularBuffer gpsBuffer;
+
+bool checkCircBuff(circularBuffer *cb);
+bool circBuffPush(circularBuffer *cb, uint8_t data);
+bool circBuffPop(circularBuffer *cb, uint8_t *data);
+
+#endif /* INC_CIRC_BUFFER_H_ */

firmware/Core/Inc/m8n.h

@@ -0,0 +1,22 @@
+/*
+ * m8n.h
+ *
+ *  Created on: 16 มี.ค. 2569
+ *      Author: pkuna
+ */
+
+#ifndef SRC_M8N_H_
+#define SRC_M8N_H_
+
+#include <stdio.h>
+#include <stdint.h>
+#include <stdbool.h>
+#include "circ_buffer.h"
+
+uint8_t gpsData = 0x55;
+volatile uint64_t CAN_TX;
+int gpsDataSize = 128;
+
+circBuffDef(gpsBuffer, 1000);
+
+#endif /* SRC_M8N_H_ */

firmware/Core/Src/circ_buffer.c

@@ -0,0 +1,46 @@
+/*
+ * circ_buffer.c
+ *
+ *  Created on: 16 มี.ค. 2569
+ *      Author: pkuna
+ */
+
+#include "circ_buffer.h"
+
+bool checkCircBuff(circularBuffer *cb) {
+	if (cb->head == cb->tail) {
+		return true;
+	} else if ((cb->head + 1) == cb->tail) {
+		return false;
+	}
+}
+
+bool circBuffPush(circularBuffer *cb, uint8_t data) {
+	if (checkCircBuff(cb)) {
+		int next = cb->head + 1;
+	    if (next >= cb->maxLen) {
+	    	next = 0;
+	    }
+		cb->buffer[cb->head] = data;
+		cb->head = next;
+
+		return true;
+	} else {
+		return false;
+	}
+}
+
+bool circBuffPop(circularBuffer *cb, uint8_t *data) {
+	if (!checkCircBuff(cb)) {
+		int next = cb->tail + 1;
+		if (next >= cb->maxLen) {
+			next = 0;
+		}
+	    *data = cb->buffer[cb->tail];
+	    cb->tail = next;
+
+		return true;
+	} else {
+		return false;
+	}
+}

firmware/Core/Src/m8n.c

@@ -0,0 +1,28 @@
+/*
+ * m8n.c
+ *
+ *  Created on: 16 มี.ค. 2569
+ *      Author: pkuna
+ */
+
+#include "main.h"
+#include "m8n.h"
+
+int readData(void) {
+	while (1) {
+		/* UART data receiver */
+		HAL_UART_Receive(&huart2, &gpsData, gpsDataSize, 1000);
+		HAL_GPIO_TogglePin(GPIOB, GPIO_PIN_2);
+		HAL_Delay(1000);
+
+		if (circBuffPush(&gpsBuffer, gpsData)) {
+			printf("yes");
+		}
+
+		if (circBuffPop(&gpsBuffer, &CAN_TX)) {
+			printf("yes");
+		}
+	}
+
+	return 0;
+}