Zoltan Hudak / Mbed 2 deprecated ManchesterUART_Receiver

Receiver demo for the Manchester encoding library using UART's hardware.

Dependencies:   CRC16 ManchesterMsg ManchesterUART mbed

Example of a Manchester code receiver using the ManchesterUART library.

main.cpp@2:5bf6cf198838, 2018-10-17 (annotated)

Committer:
hudakz
Date:
Wed Oct 17 16:19:38 2018 +0000
Revision:
2:5bf6cf198838
Parent:
1:3b3e8080688f 
Number of start patterns in preamble can be set.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
hudakz 0:a508b645fc7e 1 #include "mbed.h"
hudakz 0:a508b645fc7e 2 #include "ManchesterUART.h"
hudakz 0:a508b645fc7e 3 #include "CRC16.h"
hudakz 0:a508b645fc7e 4
hudakz 1:3b3e8080688f 5 static DigitalOut led(LED1);
hudakz 1:3b3e8080688f 6 static ManchesterUART man(p28, p27, 115200); // Tx pin name, Rx pin name, speed [bps]
hudakz 1:3b3e8080688f 7 static ManchesterMsg msg(256); // Message container (max bytes)
hudakz 1:3b3e8080688f 8 static char str[256]; // Storage for the received array of char
hudakz 1:3b3e8080688f 9 static uint32_t binaryData; // Storage for the binary data received
hudakz 1:3b3e8080688f 10 static CRC16 crc16; // CRC16 object
hudakz 1:3b3e8080688f 11 static unsigned short recvCRC16; // CRC16 received with the message
hudakz 1:3b3e8080688f 12 static unsigned short calcCRC16; // CRC16 calculated
hudakz 0:a508b645fc7e 13
hudakz 1:3b3e8080688f 14 /**
hudakz 1:3b3e8080688f 15 * @brief
hudakz 1:3b3e8080688f 16 * @note
hudakz 1:3b3e8080688f 17 * @param
hudakz 1:3b3e8080688f 18 * @retval
hudakz 1:3b3e8080688f 19 */
hudakz 1:3b3e8080688f 20 int main(void)
hudakz 1:3b3e8080688f 21 {
hudakz 1:3b3e8080688f 22 while (1)
hudakz 1:3b3e8080688f 23 {
hudakz 1:3b3e8080688f 24 if (man.receive(msg)) // Receive message
hudakz 1:3b3e8080688f 25 {
hudakz 0:a508b645fc7e 26 // Print data length and raw data bytes
hudakz 0:a508b645fc7e 27 printf("\r\n----------------------------------------\r\n");
hudakz 0:a508b645fc7e 28 printf("Message length: %d\r\n", msg.len);
hudakz 0:a508b645fc7e 29 printf("Raw data :\r\n");
hudakz 1:3b3e8080688f 30 for (size_t i = 0; i < msg.len; i++)
hudakz 1:3b3e8080688f 31 {
hudakz 1:3b3e8080688f 32 if ((i + 1) % 10 == 0)
hudakz 1:3b3e8080688f 33 printf(" %.2X\r\n", msg.data[i]);
hudakz 0:a508b645fc7e 34 else
hudakz 1:3b3e8080688f 35 printf(" %.2X", msg.data[i]);
hudakz 0:a508b645fc7e 36 }
hudakz 1:3b3e8080688f 37
hudakz 1:3b3e8080688f 38 printf("\r\n");
hudakz 1:3b3e8080688f 39
hudakz 0:a508b645fc7e 40 // Calculate CRC16. Exclude CRC bytes (last two bytes) from calculation.
hudakz 1:3b3e8080688f 41 calcCRC16 = crc16.calc(msg.data, msg.len - 2);
hudakz 1:3b3e8080688f 42 //printf("Calculated CRC16 = %d\r\n", calcCRC16);
hudakz 1:3b3e8080688f 43
hudakz 1:3b3e8080688f 44 //Extract data and CRC16 from the message
hudakz 2:5bf6cf198838 45 msg >> binaryData >> str >> recvCRC16;
hudakz 0:a508b645fc7e 46
hudakz 1:3b3e8080688f 47 //printf("Received CRC16 = %d\r\n", recvCRC16);
hudakz 1:3b3e8080688f 48 printf("\r\n");
hudakz 1:3b3e8080688f 49
hudakz 1:3b3e8080688f 50 if (calcCRC16 == recvCRC16)
hudakz 1:3b3e8080688f 51 {
hudakz 1:3b3e8080688f 52 printf("Decoded data :\r\n");
hudakz 1:3b3e8080688f 53 printf(" binary = 0x%lX\r\n", binaryData);
hudakz 1:3b3e8080688f 54 printf(" string = %s\r\n", str);
hudakz 0:a508b645fc7e 55 }
hudakz 0:a508b645fc7e 56 else
hudakz 0:a508b645fc7e 57 printf("CRC error\r\n");
hudakz 1:3b3e8080688f 58
hudakz 1:3b3e8080688f 59 led = !led;
hudakz 0:a508b645fc7e 60 }
hudakz 0:a508b645fc7e 61 }
hudakz 0:a508b645fc7e 62 }