Devin Alexander / Mbed OS MAX326xxFTHR_LoRa_PingPongExample

This program is guided to help establish a connection between two RFM95 900MHz LoRa radio modules using Maxim Integrated's Feather MCUs (MAX32630FTHR Mbed and the MAX32620FTHR Mbed). Once the radios are configured after powering on and if the radios are wired correctly, the two radios will self identify as either a master or a slave, and will then proceed to PING and PONG back and forth. Information about what is happening between the radios can be seen if the two boards are hooked up to a USB COM port through the included DAPLINK/MAX32625PICO modules.

Dependencies:   BufferedSerial SX1276GenericLib USBDeviceHT max32630fthr

Fork of MAX326xxFTHR_LoRa_PingPong by Devin Alexander

main.cpp

Committer:
Helmut64
Date:
2017-08-08
Revision:
13:5a32a1922fbc
Parent:
8:3b0d7b4ff28f
Child:
16:675f4d0ee9e9

File content as of revision 13:5a32a1922fbc:

/*
 * Copyright (c) 2017 Helmut Tschemernjak
 * 30826 Garbsen (Hannover) Germany
 * Licensed under the Apache License, Version 2.0);
 */
 #include "main.h"

/*
 * IMPORTANT NOTE
 * Use the Nucleo-L073RZ target for the STM B_L072Z_LRWAN1 LoRa board 
 */
DigitalOut myled(LED2);
BufferedSerial *ser;

int main() {
    ser = new BufferedSerial(USBTX, USBRX);
    ser->baud(115200*2);
    ser->format(8);
    ser->printf("Hello World\n\r");
    myled = 1;

    SX1276PingPong();
}


void dump(const char *title, const void *data, int len, bool dwords)
{
    dprintf("dump(\"%s\", 0x%x, %d bytes)", title, data, len);

    int i, j, cnt;
    unsigned char *u;
    const int width = 16;
    const int seppos = 7;

    cnt = 0;
    u = (unsigned char *)data;
    while (len > 0) {
        ser->printf("%08x: ", (unsigned int)data + cnt);
        if (dwords) {
            unsigned int *ip = ( unsigned int *)u;
            ser->printf(" 0x%08x\r\n", *ip);
            u+= 4;
            len -= 4;
            cnt += 4;
            continue;
        }
        cnt += width;
        j = len < width ? len : width;
        for (i = 0; i < j; i++) {
            ser->printf("%2.2x ", *(u + i));
            if (i == seppos)
                ser->putc(' ');
        }
        ser->putc(' ');
        if (j < width) {
            i = width - j;
            if (i > seppos + 1)
                ser->putc(' ');
            while (i--) {
                printf("%s", "   ");
            }
        }
        for (i = 0; i < j; i++) {
            int c = *(u + i);
            if (c >= ' ' && c <= '~')
                ser->putc(c);
            else
                ser->putc('.');
            if (i == seppos)
                ser->putc(' ');
        }
        len -= width;
        u += width;
        ser->printf("\r\n");
    }
    ser->printf("--\r\n");
}