337 lines
9.7 KiB
C++
337 lines
9.7 KiB
C++
/**
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* File name ubitx_keyer.cpp
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* CW Keyer
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*
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* The CW keyer handles either a straight key or an iambic / paddle key.
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* D12 for DOT Paddle and D11 for DASH Paddle and D* for PTT/Handkey
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*
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* Generating CW
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* The CW is cleanly generated by unbalancing the front-end mixer
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* and putting the local oscillator directly at the CW transmit frequency.
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* The sidetone, generated by the Arduino is injected into the volume control
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*/
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#include "ubitx.h"
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#include <Arduino.h>
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extern void stopTx(void);
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extern void startTx(byte txMode, byte isDisplayUpdate = 0);
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extern unsigned long sideTone;
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extern int cwSpeed;
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// extern long CW_TIMEOUT;
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extern long cwTimeout;
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#define CW_TIMEOUT (cwTimeout)
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extern volatile bool inTx;
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// extern volatile int ubitx_mode;
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extern char isUSB;
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extern char cwMode;
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extern volatile unsigned char keyerControl;
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// extern volatile unsigned char keyerState;
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volatile unsigned char keyerState = IDLE;
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// extern unsigned volatile char IAMBICB;
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// extern unsigned volatile char PDLSWAP;
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// extern volatile unsigned long Ubitx_Voltage;
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// extern volatile int Ubitx_Voltage_Timer;
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volatile bool keyDown = false; // in cw mode, denotes the carrier is being transmitted
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volatile uint8_t Last_Bits = 0xFF;
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;
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volatile bool Dot_in_Progress = false;
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volatile unsigned long Dot_Timer_Count = 0;
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volatile bool Dash_in_Progress = false;
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volatile unsigned long Dash_Timer_Count = 0;
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volatile bool Inter_Bit_in_Progress = false;
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volatile unsigned long Inter_Bit_Timer_Count = 0;
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volatile bool Turn_Off_Carrier_in_Progress = false;
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volatile unsigned long Turn_Off_Carrier_Timer_Count = 0;
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volatile bool Ubitx_Voltage_Act = false;
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volatile bool PTT_HANDKEY_ACTIVE = false;
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volatile long last_interrupt_time = 20;
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// extern bool Cat_Lock;
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// extern volatile bool TX_In_Progress;
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extern volatile bool txCAT;
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/**
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* Starts transmitting the carrier with the sidetone
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* It assumes that we have called cwTxStart and not called cwTxStop
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* each time it is called, the cwTimeOut is pushed further into the future
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*/
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void cwKeydown(void) {
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keyDown = 1; // tracks the CW_KEY
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tone(CW_TONE, (int)sideTone);
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digitalWrite(CW_KEY, 1);
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#ifdef XMIT_LED
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digitalWrite(ON_AIR, 0); // extinguish the LED on NANO's pin 13
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#endif
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}
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/**
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* Stops the CW carrier transmission along with the sidetone
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* Pushes the cwTimeout further into the future
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*/
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void cwKeyUp(void) {
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keyDown = 0; // tracks the CW_KEY
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noTone(CW_TONE);
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digitalWrite(CW_KEY, 0);
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#ifdef XMIT_LED
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digitalWrite(ON_AIR, 1); // extinguish the LED on NANO's pin 13
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#endif
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}
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void update_PaddleLatch() {
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// if (!digitalRead(DIGITAL_DOT) ) keyerControl |= DIT_L;
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// if (!digitalRead(DIGITAL_DASH) ) keyerControl |= DAH_L;
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if (digitalRead(DIGITAL_DOT) == LOW) {
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if (keyerControl & PDLSWAP)
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keyerControl |= DAH_L;
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else
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keyerControl |= DIT_L;
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}
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if (digitalRead(DIGITAL_DASH) == LOW) {
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if (keyerControl & PDLSWAP)
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keyerControl |= DIT_L;
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else
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keyerControl |= DAH_L;
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}
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}
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//////////////////////////////////////////////////////////////////////////////////////////
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// interupt handlers
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//// timers
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ISR(TIMER1_OVF_vect) {
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static volatile bool i_am_running = false;
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bool continue_loop = true;
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if (i_am_running) return;
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i_am_running = true;
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// process if CW modes
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// if( (ubitx_mode == MODE_CW)||(ubitx_mode == MODE_CWR)){
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if (cwMode > 0) {
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// process DOT and DASH timing
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if ((Dot_in_Progress) && (Dot_Timer_Count > 0)) {
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if (!inTx) {
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keyDown = 0;
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startTx(TX_CW);
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}
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if (keyDown == 0)
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cwKeydown();
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Dot_Timer_Count = Dot_Timer_Count - 1;
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if (Dot_Timer_Count <= 0) {
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Dot_Timer_Count = 0;
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Dot_in_Progress = false;
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cwKeyUp();
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}
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}
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// process Inter Bit Timing
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if ((Inter_Bit_in_Progress) && (Inter_Bit_Timer_Count > 0)) {
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Inter_Bit_Timer_Count = Inter_Bit_Timer_Count - 1;
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if (Inter_Bit_Timer_Count <= 0) {
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Inter_Bit_Timer_Count = 0;
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Inter_Bit_in_Progress = false;
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}
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}
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// process turning off carrier
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if ((Turn_Off_Carrier_in_Progress) && (Turn_Off_Carrier_Timer_Count > 0)) {
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Turn_Off_Carrier_Timer_Count = Turn_Off_Carrier_Timer_Count - 1;
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if (Turn_Off_Carrier_Timer_Count <= 0) {
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Turn_Off_Carrier_in_Progress = false;
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Turn_Off_Carrier_Timer_Count = 0;
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stopTx();
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}
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}
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// process hand key
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if (digitalRead(DIGITAL_KEY) == 0) {
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// If interrupts come faster than 5ms, assume it's a bounce and ignore
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last_interrupt_time = last_interrupt_time - 1;
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if (last_interrupt_time <= 0) {
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last_interrupt_time = 0;
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if (!inTx) {
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keyDown = 0;
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startTx(TX_CW);
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}
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if (keyDown == 0)
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cwKeydown();
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PTT_HANDKEY_ACTIVE = true;
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Turn_Off_Carrier_Timer_Count = CW_TIMEOUT;
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}
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} else if ((keyDown == 1) && (PTT_HANDKEY_ACTIVE == true)) {
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cwKeyUp();
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Turn_Off_Carrier_Timer_Count = CW_TIMEOUT;
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Turn_Off_Carrier_in_Progress = true;
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last_interrupt_time = PTT_HNDKEY_DEBOUNCE_CT;
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PTT_HANDKEY_ACTIVE = false;
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} else
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last_interrupt_time = PTT_HNDKEY_DEBOUNCE_CT;
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if (PTT_HANDKEY_ACTIVE == false) {
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while (continue_loop) {
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switch (keyerState) {
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case IDLE:
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if ((!digitalRead(DIGITAL_DOT)) || (!digitalRead(DIGITAL_DASH)) ||
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(keyerControl & 0x03)) {
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update_PaddleLatch();
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keyerState = CHK_DIT;
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Dot_in_Progress = false;
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Dot_Timer_Count = 0;
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Turn_Off_Carrier_Timer_Count = 0;
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Turn_Off_Carrier_in_Progress = false;
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} else {
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continue_loop = false;
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}
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break;
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case CHK_DIT:
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if (keyerControl & DIT_L) {
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keyerControl |= DIT_PROC;
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keyerState = KEYED_PREP;
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Dot_Timer_Count = cwSpeed;
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} else {
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keyerState = CHK_DAH;
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}
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break;
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case CHK_DAH:
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if (keyerControl & DAH_L) {
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keyerState = KEYED_PREP;
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Dot_Timer_Count = cwSpeed * 3;
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} else {
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continue_loop = false;
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keyerState = IDLE;
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}
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break;
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case KEYED_PREP:
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keyerControl &= ~(DIT_L + DAH_L); // clear both paddle latch bits
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keyerState = KEYED; // next state
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Turn_Off_Carrier_Timer_Count = 0;
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Turn_Off_Carrier_in_Progress = false;
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Dot_in_Progress = true;
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break;
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case KEYED:
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if (Dot_in_Progress == false) { // are we at end of key down ?
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Inter_Bit_in_Progress = true;
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Inter_Bit_Timer_Count = cwSpeed;
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keyerState = INTER_ELEMENT; // next state
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} else if (keyerControl & IAMBICB) {
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update_PaddleLatch(); // early paddle latch in Iambic B mode
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continue_loop = false;
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} else
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continue_loop = false;
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break;
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case INTER_ELEMENT:
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// Insert time between dits/dahs
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update_PaddleLatch(); // latch paddle state
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if (Inter_Bit_in_Progress == false) { // are we at end of inter-space ?
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Turn_Off_Carrier_Timer_Count = CW_TIMEOUT;
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Turn_Off_Carrier_in_Progress = true;
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if (keyerControl & DIT_PROC) { // was it a dit or dah ?
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keyerControl &= ~(DIT_L + DIT_PROC); // clear two bits
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keyerState = CHK_DAH; // dit done, check for dah
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} else {
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keyerControl &= ~(DAH_L); // clear dah latch
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keyerState = IDLE; // go idle
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}
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} else
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continue_loop = false;
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break;
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}
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}
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}
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}
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// process PTT
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// if( (ubitx_mode == MODE_USB)|| (ubitx_mode == MODE_LSB)){
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if (cwMode == 0) {
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if (digitalRead(PTT) == 0) {
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// If interrupts come faster than 5ms, assume it's a bounce and ignore
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last_interrupt_time = last_interrupt_time - 1;
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if (last_interrupt_time <= 0) {
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last_interrupt_time = 0;
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if (!inTx)
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startTx(TX_SSB);
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}
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} else if ((inTx) && (txCAT == false)) {
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last_interrupt_time = PTT_HNDKEY_DEBOUNCE_CT;
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stopTx();
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} else
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last_interrupt_time = PTT_HNDKEY_DEBOUNCE_CT;
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}
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i_am_running = false;
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}
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void Connect_Interrupts(void) {
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keyerControl = 0;
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cli();
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TIMSK1 |= (1 << TOIE1);
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sei();
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}
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/*
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#define N_MORSE (sizeof(morsetab)/sizeof(morsetab[0]))
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// Morse table
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struct t_mtab { char c, pat; } ;
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struct t_mtab morsetab[] = {
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{'.', 106}, {',', 115}, {'?', 76}, {'/', 41}, {'A', 6}, {'B', 17}, {'C', 21}, {'D', 9},
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{'E', 2}, {'F', 20}, {'G', 11}, {'H', 16}, {'I', 4}, {'J', 30}, {'K', 13}, {'L', 18},
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{'M', 7}, {'N', 5}, {'O', 15}, {'P', 22}, {'Q', 27}, {'R', 10}, {'S', 8}, {'T', 3},
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{'U', 12}, {'V', 24}, {'W', 14}, {'X', 25}, {'Y', 29}, {'Z', 19}, {'1', 62}, {'2', 60},
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{'3', 56}, {'4', 48}, {'5', 32}, {'6', 33}, {'7', 35}, {'8', 39}, {'9', 47}, {'0', 63}
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};
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///////////////////////////////////////////////////////////////////////////////////////////
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// CW generation routines for CQ message
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void key(int LENGTH){
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if( !inTx ) startTx(TX_CW);
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cwKeydown();
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delay(LENGTH*2);
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cwKeyUp();
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delay(cwSpeed*2);
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}
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void send(char c){
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int i ;
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if (c == ' ') {
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delay(7*cwSpeed) ;
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return ;
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}
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for (i=0; i<N_MORSE; i++){
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if (morsetab[i].c == c){
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unsigned char p = morsetab[i].pat ;
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while (p != 1) {
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if (p & 1) Dot_Timer_Count = cwSpeed*3;
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else Dot_Timer_Count = cwSpeed;
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key(Dot_Timer_Count);
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p = p / 2 ;
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}
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delay(cwSpeed*5) ;
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return ;
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}
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}
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}
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void sendmsg(char *str){
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while (*str) send(*str++);
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delay(650);
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stopTx();
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}
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*/
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