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27 lines
1.4 KiB
Plaintext
27 lines
1.4 KiB
Plaintext
This is a simple example of INDEPENDENT management of 3 stepper motors.
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You can connect up to 256 devices to common UART line
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To work with them use simple protocol:
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- each byte have 8 bits of data and nineth control bit
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- inactive modules don't read bytes with nineth bit == 0,
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only active module reads them
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- all modules send data with nineth bit == 0
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- to activate module simple send its number with nineth bit == 1
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- you can change module number (value will be stored in flash memory) by command 'N'
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and get its current number with command 'n'
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All motors have independent lines DIR and CLK and common line EN.
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Motor selection performed by setting to 1 corresponding EN pin.
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Communication with MCU realized through simple USB<->TTL converter.
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Just connect lines Rx/Tx of converter to Tx/Rx of evaluation boart,
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connect together lines GND and +3.3V.
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Communication speed: 57600, proto: 8N1
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Comminication with MCU don't need special soft: you can even run screen session
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or some terminal client like _com_. Another wariant is a simple client - client-term.
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MCU itself can print to terminal a short help about its protocol, just sent letter 'h'
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to it.
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You can connect up to 4 (5 for motor 0) end-point switches for each motor.
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There's an ability to move till certain EP switches value, also you can move
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motors infinitely (for now it realized only for all motors simultaneously).
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