mirror of
https://github.com/markqvist/OpenModem.git
synced 2025-01-20 11:41:42 -05:00
112 lines
3.4 KiB
C
112 lines
3.4 KiB
C
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//////////////////////////////////////////////////////
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// First things first, all the includes we need //
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//////////////////////////////////////////////////////
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#include <cpu/irq.h> // Interrupt functionality from BertOS
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#include <drv/ser.h> // Serial driver from BertOS
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#include <drv/timer.h> // Timer driver from BertOS
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#include <stdio.h> // Standard input/output
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#include <string.h> // String operations
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#include <net/ax25.h>
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#include "afsk.h" // Header for AFSK modem
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#if SERIAL_DEBUG
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#include "cfg/debug.h" // Debug configuration from BertOS
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#endif
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//////////////////////////////////////////////////////
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// A few definitions //
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//////////////////////////////////////////////////////
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static Afsk afsk; // Declare a AFSK modem struct
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static AX25Ctx ax25; // Declare a protocol struct
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static Serial ser; // Declare a serial interface struct
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#define ADC_CH 0 // Define which channel (pin) we want
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// for the ADC (this is A0 on arduino)
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#define YOUR_CALLSIGN "nocall"
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#define TO_CALL "apzmdm"
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static AX25Call path[] = AX25_PATH(AX25_CALL(TO_CALL, 0), AX25_CALL(YOUR_CALLSIGN, 0), AX25_CALL("wide1", 1), AX25_CALL("wide2", 2));
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#define SEND_TEST_PACKETS true
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#define TEST_INTERVAL 15000L
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#define APRS_MSG "Test APRS packet"
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#define SER_BUFFER_FULL (serialLen < MP1_MAX_DATA_SIZE-1)
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//////////////////////////////////////////////////////
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// And here comes the actual program :) //
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//////////////////////////////////////////////////////
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// This is a callback we register with the protocol,
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// so we can process each packet as they are decoded.
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// Right now it just prints the packet to the serial port.
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static void message_callback(struct AX25Msg *msg)
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{
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kfile_printf(&ser.fd, "\n\nSRC[%.6s-%d], DST[%.6s-%d]\r\n", msg->src.call, msg->src.ssid, msg->dst.call, msg->dst.ssid);
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for (int i = 0; i < msg->rpt_cnt; i++)
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kfile_printf(&ser.fd, "via: [%.6s-%d]\r\n", msg->rpt_lst[i].call, msg->rpt_lst[i].ssid);
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kfile_printf(&ser.fd, "DATA: %.*s\r\n", msg->len, msg->info);
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}
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// Simple initialization function.
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static void init(void)
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{
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// Enable interrupts
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IRQ_ENABLE;
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// Initialize hardware timers
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timer_init();
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// Initialize serial comms on UART0,
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// which is the hardware serial on arduino
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ser_init(&ser, SER_UART0);
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ser_setbaudrate(&ser, 9600);
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// For some reason BertOS sets the serial
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// to 7 bit characters by default. We set
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// it to 8 instead.
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UCSR0C = _BV(UCSZ01) | _BV(UCSZ00);
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// Create a modem context
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afsk_init(&afsk, ADC_CH);
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// ... and a protocol context with the modem
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ax25_init(&ax25, &afsk.fd, message_callback);
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// That's all!
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}
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int main(void)
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{
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// Start by running the main initialization
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init();
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// Record the current tick count for time-keeping
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ticks_t start = timer_clock();
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// Go into ye good ol' infinite loop
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while (1)
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{
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// First we instruct the protocol to check for
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// incoming data
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ax25_poll(&ax25);
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// Use AX.25 to send test data
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if (SEND_TEST_PACKETS && timer_clock() - start > ms_to_ticks(TEST_INTERVAL))
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{
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start = timer_clock();
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ax25_sendVia(&ax25, path, countof(path), APRS_MSG, sizeof(APRS_MSG));
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}
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}
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return 0;
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} |