Here is the code for the :-

Transcription

1 Here is the code for the :- Model Railway/Power Controller * Transmitter Program for a Model Railway/Power Controller * * Murray Bold, Palmerston North, New Zealand * * engineer at inspire dot net dot nz * * khz PWM Rate (Period 200) * * 163 Bytes of Bytes of RAM * * 29 December 2006 * #picaxe 08m Compile using 08m symbol SwPress = bit0 A Switch has been pressed symbol DByte = b1 Data Byte symbol LoopCount = b2 Loop Variable symbol SpeedADC = b3 Speed ADC Value symbol DirADC = b4 Direction ADC Value symbol TXPin = 0 Serial Data to TX symbol FwdRev = 1 ADC for Fwd/Rev symbol FstSlo = 2 ADC Fast / Slow symbol EmergStop = pin3 Emergency Stop symbol TXPwr = 4 Power to Tx also Tx LED Init: low TXPwr Tx Off poke 80,"U" Preamble (Sync the RX) poke 81,"U" Preamble poke 82,"U" Preamble poke 83,"M" Code 1 (Users ) poke 84,"R" Code 2 (initials ) poke 85,"B" Code 3 (ie MRB ) poke 86,"0" Speed Variable Direction Variable poke 88,"-" EOT SwPress = 0 Set No Data Changed MAIN Loop Main: Main Loop Here Delay so it wont loop too fast low TXPwr Turn off TX gosub ChkSpd Check Speed Switch gosub ChkDir Check Direction Switch if then gosub TxData Transmit Data goto Main Forever ChkSpd: if EmergStop = 0 then gosub Emergency Emerg Stop

2 readadc FstSlo, SpeedADC Read Speed Switches if SpeedADC < 90 then SpdFst If Faster - Increase Speed if SpeedADC >165 then SpdSlo If Slower - Reduce Speed poke 86,"0" SpdSlo: poke 86, "F" SpdFst: poke 86, "S" DEC Speed INC Speed ChkDir: if EmergStop = 0 then gosub Emergency Emerg Stop readadc FwdRev, DirADC Read Dir Switches if DirADC <90 then RevReq Request Reverse if DirADC >165 then FwdReq Request Forward RevReq: poke 87, "<" FwdReq: poke 87, ">" Reverse Forward Emergency: Emergeancy Stop poke 86,"E" Send "U,U,U,(3 Character User Code),Speed,Direction,-" (9 Bytes) TxData: for LoopCount = 80 to 88 9 Bytes peek LoopCount,DByte Read RAM serout TxPin,N2400,(DByte) Send Byte next LoopCount Next Byte SwPress = 0 Reset Data Change pause 5 Small Delay

3 ***** * Receiver Program for a Model Railway/Power Controller * * Output Data can be read on terminal if program cable is present. * * When changing direction, PWM rate reduces to approx 8% DC * * then operates the relay and waits approx 1 second. It then * * accelerates to 2/3 of what it was prior to the direction change * * Murray Bold, Palmerston North, New Zealand * * engineer at inspire dot net dot nz * * M R B Version * * khz PWM Rate (Period 200) * * 243 bytes of bytes with debug data on * * 29 December 2006 * ***** #picaxe 08m Compile using 08m symbol Spare = 0 Spare Pin symbol FwdRev = 1 Fwd/Rev Relay symbol PWMPin = 2 PWM to FET symbol DataIn = 3 Data Input symbol RxData = 4 RXing Data symbol DirFlag = bit0 Direction Flag symbol ChangeData = bit1 Data has changed symbol Spd = b1 SpeedInput. (E,F,R) symbol DirFR = b2 Direction (<,>) symbol Temp = b3 Temp byte (-) symbol FCount = b4 Forward Dir Counter symbol RCount = b5 Reverse Dir Counter symbol Rate = b6 Acc/Dec Rate symbol PWMSpeed = W4 PWM Duty Cycle (80-400) symbol SaveSpd = W5 Saved Speed symbol MaxSpd = 800 Maximum Speed (PWM 100%) symbol MinSpd = 60 Minimum Speed (PWM 8%) *** Init: PWMSpeed = MinSpd Set MinSpeed low RxData Turn off RxData LED low FwdRev Set Forward (Relay Off) pwmout PWMPin,200,PWMSpeed PWM output = Min Speed Main: Data in = XXX(Same code as Tx),Speed,Direction,EOT="-" DirTest: ChkDir: serin DataIn,N2400,("MRB"),Spd,DirFR,Temp Get data if Temp <> "-" then Main Invalid byte high RxData Rx Data LED On if Spd ="0" then DirTest if Spd ="E" then gosub Emerg Emergency Stop if Spd ="F" then gosub Faster Increase Speed if Spd ="S" then gosub Slower Decrease Speed if DirFR <> "0" then goto ChkDir FCount = 0:RCount = 0 Reset Fwd & Rev Count 0 if DirFR ="<" then gosub RevDir Reverse if DirFR =">" then gosub FwdDir Forward

4 if ChangeData = 1 then gosub SpeedSet Update PWM low RxData Rx Data LED Off goto Main Faster: Slower: Rate = 15 PWMSpeed = PWMSpeed + Rate MAX MaxSpd Increase Speed ChangeData = 1 Set Flag Rate = 15 PWMSpeed = PWMSpeed - Rate MIN MinSpd Decrease Speed ChangeData = 1 Set Flag Emerg: Rate = 60 pwmout PWMPin,0,0 RCount = 0:FCount = 0 Deceleration Rate Stop PWM Reset Fwd/Rev Counters FwdDir: RevDir: SlowUp: if DirFlag = 0 then::endif Already Forward RCount = 0 Reset Rev Count 0 INC FCount Add 1 to Count if FCount < 5 then::endif Need 5 in a row to be valid FCount = 0 Reset Fwd Count 0 Rate = 30 Deceleration Rate DirFlag = 0 Set Flag for Forward low FwdRev Reverse Relay Off pause 250 Stopped delay gosub SpeedUp Increase Speed if DirFlag = 1 then::endif Already Reverse FCount = 0 Reset Fwd Count 0 INC RCount Add 1 to Count if RCount < 5 then::endif Need 5 in a row to be valid RCount = 0 Reset Rev Count 0 Rate = 30 Deceration Rate DirFlag = 1 Set Flag for Reverse high FwdRev Reverse Relay On pause 250 Stopped delay gosub SpeedUp Increase Speed SaveSpd = PWMSpeed /3 * 2 Save 2/3 current speed do if PWMSpeed = MinSpd then exit Exit if at Minimum Speed PWMSpeed = PWMSpeed - Rate MIN MinSpd Slow down gosub SpeedSet Change PWM output Wait a nats

5 loop Again SpeedUp: SpeedSet: Increase PWM to Saved Speed do if PWMSpeed >= SaveSpd then exit Exit if at Minimum Speed PWMSpeed = PWMSpeed + Rate Speed Up gosub SpeedSet Change PWM output Wait a nats loop Again pwmout PWMPin,200,PWMSpeed Set PWM M/S Ratio ChangeData = 0 Reset Flag sertxd (#PWMSpeed," ",#DirFlag,13,10) Uncomment to Debug ***