Zoltan Hudak / Mbed 2 deprecated Manchester_Receiver

Manchester receiver demo.

Dependencies:   Manchester mbed CRC16 ManchesterMsg

main.cpp@6:d1191c39b418, 2018-10-14 (annotated)

Committer:
hudakz
Date:
Sun Oct 14 09:46:53 2018 +0000
Revision:
6:d1191c39b418
Parent:
5:3dc7d8e25c89 
Number of sync pulses in preamble can be set.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
hudakz 0:91017f5f5cb3 1 #include "mbed.h"
hudakz 0:91017f5f5cb3 2 #include "Manchester.h"
hudakz 2:1cb83aa7b99a 3 #include "CRC16.h"
hudakz 0:91017f5f5cb3 4
hudakz 0:91017f5f5cb3 5 DigitalOut led(LED1);
hudakz 6:d1191c39b418 6 Manchester man(D3, D4, 9600); // Tx pin, Rx pin, speed [bps]
hudakz 5:3dc7d8e25c89 7 ManchesterMsg msg(100); // Message container (max bytes)
hudakz 5:3dc7d8e25c89 8 char str[80]; // Storage for the received array of char
hudakz 5:3dc7d8e25c89 9 uint32_t val; // Storage for the value received
hudakz 5:3dc7d8e25c89 10 CRC16 crc16; // CRC16 object
hudakz 5:3dc7d8e25c89 11 unsigned short recvCRC16; // CRC16 received in the message
hudakz 5:3dc7d8e25c89 12 unsigned short calcCRC16; // CRC16 calculated
hudakz 0:91017f5f5cb3 13
hudakz 0:91017f5f5cb3 14 int main(void) {
hudakz 6:d1191c39b418 15 man.setPreamble(5); // Number of sync pulses in preamble
hudakz 0:91017f5f5cb3 16 while(1) {
hudakz 6:d1191c39b418 17 if(man.receive(msg)) { // Receive message
hudakz 4:649d9a4219c0 18
hudakz 1:2ce05484e526 19 // Print data length and raw data bytes
hudakz 4:649d9a4219c0 20 printf("\r\n----------------------------------------\r\n");
hudakz 4:649d9a4219c0 21 printf("Message length = %d, Raw data :\r\n", msg.len);
hudakz 1:2ce05484e526 22 for(size_t i = 0; i < msg.len; i++) {
hudakz 1:2ce05484e526 23 if((i + 1) % 10 == 0)
hudakz 1:2ce05484e526 24 printf(" %.2x\r\n", msg.data[i]);
hudakz 1:2ce05484e526 25 else
hudakz 1:2ce05484e526 26 printf(" %.2x", msg.data[i]);
hudakz 1:2ce05484e526 27 }
hudakz 4:649d9a4219c0 28 printf("\r\n\r\n");
hudakz 2:1cb83aa7b99a 29
hudakz 5:3dc7d8e25c89 30 // Calculate CRC16. Exclude CRC bytes (last two bytes) from calculation.
hudakz 5:3dc7d8e25c89 31 calcCRC16 = crc16.calc(msg.data, msg.len - 2);
hudakz 5:3dc7d8e25c89 32 printf("Calculated CRC16 = %d\r\n", calcCRC16);
hudakz 2:1cb83aa7b99a 33
hudakz 3:0c6680f77855 34 // Extract data and CRC16 from the message
hudakz 4:649d9a4219c0 35 msg >> str >> val >> recvCRC16;
hudakz 2:1cb83aa7b99a 36
hudakz 4:649d9a4219c0 37 printf("Received CRC16 = %d\r\n", recvCRC16);
hudakz 5:3dc7d8e25c89 38 printf("\r\n");
hudakz 2:1cb83aa7b99a 39
hudakz 5:3dc7d8e25c89 40 if( calcCRC16 == recvCRC16) {
hudakz 4:649d9a4219c0 41 printf("Received data :\r\n");
hudakz 2:1cb83aa7b99a 42 printf(" str = %s\r\n", str);
hudakz 2:1cb83aa7b99a 43 printf(" val = 0x%x\r\n", val);
hudakz 2:1cb83aa7b99a 44 }
hudakz 4:649d9a4219c0 45 else
hudakz 4:649d9a4219c0 46 printf("CRC error\r\n");
hudakz 0:91017f5f5cb3 47 }
hudakz 0:91017f5f5cb3 48 else
hudakz 0:91017f5f5cb3 49 printf("Error\r\n");
hudakz 0:91017f5f5cb3 50
hudakz 0:91017f5f5cb3 51 led = !led;
hudakz 0:91017f5f5cb3 52 }
hudakz 0:91017f5f5cb3 53 }