政务网站建设的重要性,北京软件开发公司推荐,美团这个网站多少钱做的,互联网+创业项目ppt成品VX-3R本身是不带APRS功能的#xff0c;不过可能通过外加TNC实现APRS功能。 有大佬已经用Arduino实现了相应的发射功能#xff1a; https://github.com/handiko/Arduino-APRS 我要做的#xff0c;就是简单修改一下代码#xff0c;做一个转接板。 YEASU官方没有给出VX-3R的音…VX-3R本身是不带APRS功能的不过可能通过外加TNC实现APRS功能。 有大佬已经用Arduino实现了相应的发射功能 https://github.com/handiko/Arduino-APRS 我要做的就是简单修改一下代码做一个转接板。 YEASU官方没有给出VX-3R的音频接口四节定义估计是为了推销自家的CT-44,手册上只有这么一个图 在网上查了一圈pinguide上有这么个图然后提了一句“Pinouts for speaker and mic are reversed on the vx-3r”。但是经我实际验证VX-3R的定义跟网站上是一样的并没有reversed。 转接板原理图如下 实物图如下 值得注意的是VX-3R的PTT是低电平发射。 完整的代码如下
/** Copyright (C) 2018 - Handiko Gesang - www.github.com/handiko* * This program is free software: you can redistribute it and/or modify* it under the terms of the GNU General Public License as published by* the Free Software Foundation, either version 3 of the License, or* (at your option) any later version.* * This program is distributed in the hope that it will be useful,* but WITHOUT ANY WARRANTY; without even the implied warranty of* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the* GNU General Public License for more details.* * You should have received a copy of the GNU General Public License* along with this program. If not, see https://www.gnu.org/licenses/.*/
#include math.h
#include stdio.h// Defines the Square Wave Output Pin
#define OUT_PIN 2#define _1200 1
#define _2400 0#define _FLAG 0x7e
#define _CTRL_ID 0x03
#define _PID 0xf0
#define _DT_EXP ,
#define _DT_STATUS
#define _DT_POS !#define _NORMAL 1
#define _BEACON 2#define _FIXPOS 1
#define _STATUS 2
#define _FIXPOS_STATUS 3#define _PTT 5bool nada _2400;/** SQUARE WAVE SIGNAL GENERATION* * baud_adj lets you to adjust or fine tune overall baud rate* by simultaneously adjust the 1200 Hz and 2400 Hz tone,* so that both tone would scales synchronously.* adj_1200 determined the 1200 hz tone adjustment.* tc1200 is the half of the 1200 Hz signal periods.* * ------------------------- -------* | | |* | | |* | | |* ---- -------------------------* * |------ tc1200 ---------|------ tc1200 ---------|* * adj_2400 determined the 2400 hz tone adjustment.* tc2400 is the half of the 2400 Hz signal periods.* * ------------ ------------ -------* | | | | |* | | | | | * | | | | |* ---- ------------ ------------* * |--tc2400--|--tc2400--|--tc2400--|--tc2400--|* */
const float baud_adj 0.975;
const float adj_1200 1.0 * baud_adj;
const float adj_2400 1.0 * baud_adj;
unsigned int tc1200 (unsigned int)(0.5 * adj_1200 * 1000000.0 / 1200.0);
unsigned int tc2400 (unsigned int)(0.5 * adj_2400 * 1000000.0 / 2400.0);/** This strings will be used to generate AFSK signals, over and over again.*/
const char *mycall BG7GF;
char myssid 7;const char *dest APRS;
const char *dest_beacon BEACON;const char *digi WIDE2;
char digissid 1;const char *mystatus Hello World, This is a simple Arduino APRS Transmitter !;const char *lat 28XX.09N;
const char *lon 112XX.62E;
const char sym_ovl H;
const char sym_tab a;unsigned int tx_delay 5000;
unsigned int str_len 400;char bit_stuff 0;
unsigned short crc0xffff;/** */
void set_nada_1200(void);
void set_nada_2400(void);
void set_nada(bool nada);void send_char_NRZI(unsigned char in_byte, bool enBitStuff);
void send_string_len(const char *in_string, int len);void calc_crc(bool in_bit);
void send_crc(void);void send_packet(char packet_type, char dest_type);
void send_flag(unsigned char flag_len);
void send_header(char msg_type);
void send_payload(char type);void set_io(void);
void print_code_version(void);
void print_debug(char type, char dest_type);/** */
void set_nada_1200(void)
{digitalWrite(OUT_PIN, HIGH);delayMicroseconds(tc1200);digitalWrite(OUT_PIN, LOW);delayMicroseconds(tc1200);
}void set_nada_2400(void)
{digitalWrite(OUT_PIN, HIGH);delayMicroseconds(tc2400);digitalWrite(OUT_PIN, LOW);delayMicroseconds(tc2400);digitalWrite(OUT_PIN, HIGH);delayMicroseconds(tc2400);digitalWrite(OUT_PIN, LOW);delayMicroseconds(tc2400);
}void set_nada(bool nada)
{if(nada)set_nada_1200();elseset_nada_2400();
}/** This function will calculate CRC-16 CCITT for the FCS (Frame Check Sequence)* as required for the HDLC frame validity check.* * Using 0x1021 as polynomial generator. The CRC registers are initialized with* 0xFFFF*/
void calc_crc(bool in_bit)
{unsigned short xor_in;xor_in crc ^ in_bit;crc 1;if(xor_in 0x01)crc ^ 0x8408;
}void send_crc(void)
{unsigned char crc_lo crc ^ 0xff;unsigned char crc_hi (crc 8) ^ 0xff;send_char_NRZI(crc_lo, HIGH);send_char_NRZI(crc_hi, HIGH);
}void send_header(char msg_type)
{char temp;/** APRS AX.25 Header * ........................................................* | DEST | SOURCE | DIGI | CTRL FLD | PID |* --------------------------------------------------------* | 7 bytes | 7 bytes | 7 bytes | 0x03 | 0xf0 |* --------------------------------------------------------* * DEST : 6 byte callsign 1 byte ssid* SOURCE : 6 byte your callsign 1 byte ssid* DIGI : 6 byte digi callsign 1 byte ssid* * ALL DEST, SOURCE, DIGI are left shifted 1 bit, ASCII format.* DIGI ssid is left shifted 1 bit 1* * CTRL FLD is 0x03 and not shifted.* PID is 0xf0 and not shifted.*//********* DEST ***********/if(msg_type _NORMAL){temp strlen(dest);for(int j0; jtemp; j)send_char_NRZI(dest[j] 1, HIGH);}else if(msg_type _BEACON){temp strlen(dest_beacon);for(int j0; jtemp; j)send_char_NRZI(dest_beacon[j] 1, HIGH);}if(temp 6){for(int j0; j(6 - temp); j)send_char_NRZI( 1, HIGH);}send_char_NRZI(0 1, HIGH);/********* SOURCE *********/temp strlen(mycall);for(int j0; jtemp; j)send_char_NRZI(mycall[j] 1, HIGH);if(temp 6){for(int j0; j(6 - temp); j)send_char_NRZI( 1, HIGH);}send_char_NRZI((myssid 0) 1, HIGH);/********* DIGI ***********/temp strlen(digi);for(int j0; jtemp; j)send_char_NRZI(digi[j] 1, HIGH);if(temp 6){for(int j0; j(6 - temp); j)send_char_NRZI( 1, HIGH);}send_char_NRZI(((digissid 0) 1) 1, HIGH);/***** CTRL FLD PID *****/send_char_NRZI(_CTRL_ID, HIGH);send_char_NRZI(_PID, HIGH);
}void send_payload(char type)
{/** APRS AX.25 Payloads* * TYPE : POSITION* ........................................................* |DATA TYPE | LAT |SYMB. OVL.| LON |SYMB. TBL.|* --------------------------------------------------------* | 1 byte | 8 bytes | 1 byte | 9 bytes | 1 byte |* --------------------------------------------------------* * DATA TYPE : !* LAT : ddmm.ssN or ddmm.ssS* LON : dddmm.ssE or dddmm.ssW* * * TYPE : STATUS* ..................................* |DATA TYPE | STATUS TEXT |* ----------------------------------* | 1 byte | N bytes |* ----------------------------------* * DATA TYPE : * STATUS TEXT: Free form text* * * TYPE : POSITION STATUS* ..............................................................................* |DATA TYPE | LAT |SYMB. OVL.| LON |SYMB. TBL.| STATUS TEXT |* ------------------------------------------------------------------------------* | 1 byte | 8 bytes | 1 byte | 9 bytes | 1 byte | N bytes |* ------------------------------------------------------------------------------* * DATA TYPE : !* LAT : ddmm.ssN or ddmm.ssS* LON : dddmm.ssE or dddmm.ssW* STATUS TEXT: Free form text* * * All of the data are sent in the form of ASCII Text, not shifted.* */if(type _FIXPOS){send_char_NRZI(_DT_POS, HIGH);send_string_len(lat, strlen(lat));send_char_NRZI(sym_ovl, HIGH);send_string_len(lon, strlen(lon));send_char_NRZI(sym_tab, HIGH);}else if(type _STATUS){send_char_NRZI(_DT_STATUS, HIGH);send_string_len(mystatus, strlen(mystatus));}else if(type _FIXPOS_STATUS){send_char_NRZI(_DT_POS, HIGH);send_string_len(lat, strlen(lat));send_char_NRZI(sym_ovl, HIGH);send_string_len(lon, strlen(lon));send_char_NRZI(sym_tab, HIGH);send_char_NRZI( , HIGH);send_string_len(mystatus, strlen(mystatus));}
}/** This function will send one byte input and convert it* into AFSK signal one bit at a time LSB first.* * The encode which used is NRZI (Non Return to Zero, Inverted)* bit 1 : transmitted as no change in tone* bit 0 : transmitted as change in tone*/
void send_char_NRZI(unsigned char in_byte, bool enBitStuff)
{bool bits;for(int i 0; i 8; i){bits in_byte 0x01;calc_crc(bits);if(bits){set_nada(nada);bit_stuff;if((enBitStuff) (bit_stuff 5)){nada ^ 1;set_nada(nada);bit_stuff 0;}}else{nada ^ 1;set_nada(nada);bit_stuff 0;}in_byte 1;}
}void send_string_len(const char *in_string, int len)
{for(int j0; jlen; j)send_char_NRZI(in_string[j], HIGH);
}void send_flag(unsigned char flag_len)
{for(int j0; jflag_len; j)send_char_NRZI(_FLAG, LOW);
}/** In this preliminary test, a packet is consists of FLAG(s) and PAYLOAD(s).* Standard APRS FLAG is 0x7e character sent over and over again as a packet* delimiter. In this example, 100 flags is used the preamble and 3 flags as* the postamble.*/
void send_packet(char packet_type, char dest_type)
{print_debug(packet_type, dest_type);digitalWrite(LED_BUILTIN, 1);digitalWrite(_PTT, LOW);/** AX25 FRAME* * ........................................................* | FLAG(s) | HEADER | PAYLOAD | FCS(CRC) | FLAG(s) |* --------------------------------------------------------* | N bytes | 22 bytes | N bytes | 2 bytes | N bytes |* --------------------------------------------------------* * FLAG(s) : 0x7e* HEADER : see header* PAYLOAD : 1 byte data type N byte info* FCS : 2 bytes calculated from HEADER PAYLOAD*/send_flag(100);crc 0xffff;send_header(dest_type);send_payload(packet_type);send_crc();send_flag(3);digitalWrite(_PTT, HIGH);digitalWrite(LED_BUILTIN, 0);
}/** Function to randomized the value of a variable with defined low and hi limit value.* Used to create random AFSK pulse length.*/
void randomize(unsigned int var, unsigned int low, unsigned int high)
{var random(low, high);
}/** */
void set_io(void)
{pinMode(LED_BUILTIN, OUTPUT);pinMode(OUT_PIN, OUTPUT);pinMode(_PTT, OUTPUT);digitalWrite(_PTT, HIGH);Serial.begin(115200);
}void print_code_version(void)
{Serial.println( );Serial.print(Sketch: ); Serial.println(__FILE__);Serial.print(Uploaded: ); Serial.println(__DATE__);Serial.println( );Serial.println(Random String Pulsed AFSK Generator - Started \n);
}void print_debug(char type, char dest_type)
{/** PROTOCOL DEBUG.* * Will outputs the transmitted data to the serial monitor* in the form of TNC2 string format.* * MYCALL-NAPRS,DIGIn-N:PAYLOAD STRING CRLF*//****** MYCALL ********/Serial.print(mycall);Serial.print(-);Serial.print(myssid, DEC);Serial.print();/******** DEST ********/if(dest_type _NORMAL){Serial.print(dest);}else if(dest_type _BEACON){Serial.print(dest_beacon);}Serial.print(,);/******** DIGI ********/Serial.print(digi);Serial.print(-);Serial.print(digissid, DEC);Serial.print(:);/******* PAYLOAD ******/if(type _FIXPOS){Serial.print(_DT_POS);Serial.print(lat);Serial.print(sym_ovl);Serial.print(lon);Serial.print(sym_tab);}else if(type _STATUS){Serial.print(_DT_STATUS);Serial.print(mystatus);}else if(type _FIXPOS_STATUS){Serial.print(_DT_POS);Serial.print(lat);Serial.print(sym_ovl);Serial.print(lon);Serial.print(sym_tab);Serial.print( );Serial.print(mystatus);}Serial.println( );
}/** */
void setup()
{set_io();print_code_version();
}void loop()
{send_packet(random(1,4), random(1,3));delay(tx_delay);randomize(tx_delay, 10, 5000);randomize(str_len, 10, 420);
}
