To run a motor

Discussion of the PSoC Designer integrated development environment for PSoC1 devices.

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To run a motor

Postby arivalagan13 » Fri Jan 18, 2013 10:53 pm

hai,
i need to run a motor... the psoc should produce digital output to drive the driver......
it should work on following logic.....
psoc output a psoc output b
1 0 fwd direction
0 1 rvse direction
could u pls help me by providing a c program in psoc designer 5.1 based on above logic...
arivalagan13
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Re: To run a motor

Postby bobmarlowe » Sat Jan 19, 2013 12:52 am

The easiest to access a pin in PSoC1 Designer is to use aLED-component which you may switch on or off as you like. Proper naming of the components (HiSide, LoSide) may help to understand the design.
More difficult will be to avoid the state where both parts of your motor driver are active thus shorting Vcc to Gnd. This may never occur even during the time the device is powered-up, can be solved porobably by using pull-up or pull down resistors. Some integrated H-bridge use enable inputs.

Additionally I would suggest you to upgrade your 5.1-version of Designer to 5.3. The upgrade is free and there are new and corrected components.

Happy coding
Bob
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Re: To run a motor

Postby danadak » Sat Jan 19, 2013 4:38 am

You can use the routing fabric in PSOC 1 to create an inverted
signal from a single driven logic output, like a PWM. By converting
this problem to HW you can avoid the problem in an H Bridge of
shorting to ground. Note most modern H Bridge integrated power
driver parts take care of that problem for you. Note this is a subopt-
imal way of doing this because you want a dead period to account
for inherent switching speed differences between low and high side
drivers.

H_bridge_svg.png
H_bridge_svg.png (6 KiB) Viewed 3130 times


PSOC 1 Routing Fabric.jpg
PSOC 1 Routing Fabric.jpg (44.84 KiB) Viewed 3131 times


Bobs recomendation pertainent since LED module takes care of shadow
registers, which are needed in the port you are using if it has mixed I/O
in it.

http://www.cypress.com/?rID=39497
http://www.cypress.com/?docID=38040

PSOC 1 Routing Fabric.jpg
PSOC 1 Routing Fabric.jpg (44.84 KiB) Viewed 3131 times


Regards, Dana.
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