I create connection between machinekit (i create variable PWM.meas => this variable will use to PWM) and script hal_temp_bbb. Now i need edit a script. Can you help me with this problem? This is the script:
https://github.com/machinekit/machinekit/blob/master/src/hal/user_comps/hal_temp_bbb.py I tried edit this sections: def adc2r_cramps(pin): * V_adc = pin.rawValue* # V_T = 0.0 # Voltage across the thermistor # R_PU = 2000.0 #Pull-up resistence # I_PU = 0.0 # Current flowing through the pull-up resistor # R_T = 0.0 # Resistance of the thermistor # V_T = V_adc # No dividing by zero or negative voltages despite what the ADC says! # Clip to a small positive value # I_PU = max((1.8 - V_T ) / R_PU, 0.000001) # R_T = V_T / I_PU * return V_adc* def adc2Temp(pin): if(args.cape_board == 'BeBoPr'): R = adc2r_bebopr(pin) elif (args.cape_board == 'CRAMPS'): R = adc2r_cramps(pin) else: print("Invalid -b cape name: %s" % args.cape_board) print("Valid names are: BeBoPr, CRAMPS") sys.exit(1) return round(R) But without corect solution. 2016-04-20 16:46 GMT+02:00 Charles Steinkuehler <[email protected]>: > You need Machinekit HAL file knowledge, not Linux (or AVR). > > You load the ADC code with a line like this: > > > https://github.com/machinekit/machinekit/blob/master/configs/ARM/BeagleBone/CRAMPS/CRAMPS.hal#L35 > > ...except you will probably want to use "none" for the thermistor > (which is epcos_B57560G1104 in the example above). Adjust the > channel(s) (04: and 05: in the example above) to select the ADC input > pin you wish to use. > > Then you need to connect the ADC reading to your PWM driver with a HAL > signal like so: > > > https://github.com/machinekit/machinekit/blob/master/configs/ARM/BeagleBone/CRAMPS/CRAMPS.hal#L365-L366 > > ...but you should use the .raw signal (ie: Therm.ch-04.raw) instead of > the value to get a value between 0-4095. > > Since this is specifically a Machinekit question, you should probably > be asking on the Machinekit Google group: > > https://groups.google.com/forum/#!forum/machinekit > > On 4/20/2016 9:18 AM, Matus Kamensky wrote: > > Thanks for your answer. But i don´t know, how this structure or command > write. I > > work with AVR microprocessor, no with linux. Can you send me some > examples of > > command, which I solve my problem? . I need only number with range > 0-4000 from > > 0-1,8V (AIN0). I use machinekit,debian 3.8. and beagle bone black (own > cape).Thanks > > > > 2016-04-20 16:06 GMT+02:00 Charles Steinkuehler < > [email protected] > > <mailto:[email protected]>>: > > > > On 4/20/2016 8:15 AM, Matus Kamensky wrote: > > > Hi. I use machinekit for controlling my CNC mill and i need read > ADC pin (AIN0) > > > to set speed of my motor (0-4000rpm). I need convert voltage > (0-1,8V) to > > > pwmgen.parameter(0-4000). Can You help me? Thanks. > > > > Start with the BBB temperature code: > > > > > https://github.com/machinekit/machinekit/blob/master/src/hal/user_comps/hal_temp_bbb.py > > > > ...use "none" for the thermistor and use the .raw HAL pin in your HAL > > file. If you want, you can delete the code that converts ADC values > > to a resistance and then a temperature value, or add some appropriate > > scaling so you can directly connect the .raw output pin to your > pwmgen > > input. > > -- > Charles Steinkuehler > [email protected] > > -- > For more options, visit http://beagleboard.org/discuss > --- > You received this message because you are subscribed to a topic in the > Google Groups "BeagleBoard" group. > To unsubscribe from this topic, visit > https://groups.google.com/d/topic/beagleboard/zTS1a2GxEYs/unsubscribe. > To unsubscribe from this group and all its topics, send an email to > [email protected]. > To view this discussion on the web visit > https://groups.google.com/d/msgid/beagleboard/57179661.1040607%40steinkuehler.net > . > For more options, visit https://groups.google.com/d/optout. > -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/CAC8WByaeEb_akOufDx9smAa_uY9%3DErAi0twTMaGF%3DoNLMZ58dQ%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
