add rf433mhz component to extras, for using antenna modules with esp

examples/rf433mhz/Makefile

@@ -0,0 +1,4 @@
+PROGRAM = rf-send-recieve
+EXTRA_COMPONENTS = extras/rf433mhz
+include ../../common.mk
+

examples/rf433mhz/rf-send-recieve.c

@@ -0,0 +1,88 @@
+//esp sdk
+#include "espressif/esp_common.h"
+#include "esp/uart.h"
+
+//rtos
+#include "FreeRTOS.h"
+#include "task.h"
+#include "queue.h"
+
+//rf 433mhz
+#include <rf433mhz/rf_433mhz.h>
+
+#define TRANSMITTER_PIN 5
+#define RECIEVER_PIN 4
+
+reciever_433mhz* reciever;
+QueueHandle_t decode_queue;
+
+void rf433mhz_transmit(void *pvParameters) {
+	gpio_enable(TRANSMITTER_PIN, GPIO_OUTPUT);
+	message_433mhz msg;
+	msg.code_lenght=24;
+	msg.repeat=2;
+	msg.pulse_length = 312;
+	protocol_433mhz proto = protocols_433mhz[PROTO1];
+	msg.protocol = &proto;
+
+	while(true) {
+		msg.data=1364;
+		send_message_433mhz(TRANSMITTER_PIN, &msg);
+		vTaskDelay(1000);
+		msg.data=1361;
+		send_message_433mhz(TRANSMITTER_PIN, &msg);
+		vTaskDelay(1000);
+	}
+}
+
+void recieve_interrupt_handler(uint8_t gpio_num) {
+	BaseType_t xHigerPriorityTaskTriggerd = pdFALSE;
+	UBaseType_t uxSavedInterruptStatus;
+	uxSavedInterruptStatus = taskENTER_CRITICAL_FROM_ISR();
+	recieve_on_interrupt(reciever);
+	if (reciever->repeatCount < 2) {
+		taskEXIT_CRITICAL_FROM_ISR(uxSavedInterruptStatus);
+		return;
+	}
+	//printf("Function recieve_interrupt_handler recieved going enter critical \n");
+	reciever_433mhz* old_reciever = reciever;
+	reciever = create_reciever_buffer();
+	taskEXIT_CRITICAL_FROM_ISR(uxSavedInterruptStatus);
+	xQueueSendFromISR(decode_queue, &old_reciever, &xHigerPriorityTaskTriggerd);
+}
+
+void rf433mhz_recieve(void *pvParameters) {
+	//enable reception on recieve pin
+	gpio_enable(RECIEVER_PIN, GPIO_INPUT);
+	reciever = create_reciever_buffer();
+	gpio_set_interrupt(RECIEVER_PIN, GPIO_INTTYPE_EDGE_ANY, recieve_interrupt_handler);
+
+	reciever_433mhz* recv;
+	message_433mhz msg;
+	while(1) {
+		if(xQueueReceive(decode_queue, &recv, 0) == pdTRUE){
+			//try to decode recieved data
+			bool recieved = false;
+			for(int i=0; i < PROTOCOL_COUNT ; i++) {
+				if(decode_recieved(recv, &protocols_433mhz[i], &msg)) {
+					recieved = true;
+					printf("Recieved message with data: %d\n", msg.data);
+					break;
+				}
+				//no protcol found to decode data
+			}
+			free(recv);
+		}
+	}
+}
+
+void user_init(void) {
+	uart_set_baud(0, 115200);
+
+	decode_queue = xQueueCreate(2, sizeof(reciever_433mhz*));
+
+	//start tasks
+	xTaskCreate(rf433mhz_transmit, "transmitter_rf", 256, NULL, 1, NULL);
+	xTaskCreate(rf433mhz_recieve, "reciever_rf", 256, NULL, 1, NULL);
+
+}