added tasks and some extra helper things

README.MD

@@ -1,3 +1,6 @@
-# Doing serial with c
-
-# dont ask
+# serial for ip2
+TODO:
+- [ ] create read function
+- [ ] create write function
+- [ ] how to be aware of data arriving
+- [ ] other

communication.c

@@ -33,12 +33,18 @@ void comm_end_communication(struct sp_port *port) {
 	sp_free_port_list(port_list);
 }
 
-int comm_write(u_int8_t data) {
+int comm_write(byte data) {
 	// we are writing 8 bit bytes to the fpga anyways and pc -> fpga only needs to tell what do to next, can be fit in 8 bits
 	//TODO: IMPLEMENT
 	return 0;
 }
 
+int comm_await() {
+	// Await data from the robot
+	//TODO: IMPLEMENT
+	return 0;
+}
+
 struct sp_port **comm_get_port_list() {
 	struct sp_port **port_list;
 	enum sp_return result = sp_list_ports(&port_list);
@@ -95,8 +101,18 @@ int check(enum sp_return result)
 	}
 }
 
-void uint8_to_bit_array(u_int8_t bit_array[], u_int8_t data) {
+void uint8_to_bit_array(byte bit_array[], byte data) {
 	for (int i = 0; i < 8; i++) {
 		bit_array[i] = (data >> i) & 1;
 	}
 }
+
+byte bit_array_to_uint8(byte bit_array[]) {
+	byte data=0;
+	byte currentpow=1;
+	for (int i = 0; i < 8; i++) {
+		data+=bit_array[i]*currentpow;
+		currentpow*=2;
+	}
+	return data;
+}

communication.h

@@ -7,6 +7,7 @@
 #include <libserialport.h>
 #include <stdlib.h>
 
+typedef u_int8_t byte;
 
 void comm_init_communication();
 
@@ -23,5 +24,6 @@ void comm_open_port(struct sp_port *port);
 
 int check(enum sp_return result);
 
-void uint8_to_bit_array(u_int8_t *bit_array, u_int8_t data);
+void uint8_to_bit_array(byte *bit_array, byte data);
+byte bit_array_to_uint8(const byte bit_array[]);
 #endif //COMMS_H

main.c

@@ -11,13 +11,13 @@ extern struct sp_port *port;
 int main(int argc, char *argv[]) {
 	comm_init_communication();
 
-	u_int8_t data = 205;
+	byte data = 205;
 	int size = 1;
 	printf("size: %d\n", size);
 	unsigned int timeout = 50 * size; //50 ms timeout per byte
 
 	check(sp_nonblocking_write(port, &data, size));
-	char *buf = malloc(size + 1);
+	byte *buf = malloc(size + 1);
 
 	int result = check(sp_blocking_read(port, buf, size, timeout));
 
@@ -27,13 +27,14 @@ int main(int argc, char *argv[]) {
 	buf[result] = '\0';
 	printf("%s\n", buf);
 
-	u_int8_t bits[8];
-	uint8_to_bit_array(bits, buf[0]);
-	free(buf);
+	byte bits[8];
+	uint8_to_bit_array(bits, buf);
 
 	for (int i = 0; i < 8; i++) {
 		printf("%d ", bits[i]);
 	}
+	byte reconv_data = bit_array_to_uint8(bits);
+	printf("data: %d\n", reconv_data);
 	printf("\n");
 
 	comm_end_communication(port);