Subject:
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Re: digital output
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Fri, 2 May 1997 03:35:41 GMT
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Original-From:
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Rajesh Gottlieb <rajeshg@ccwf.cc.NOSPAMutexas.edu>
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Viewed:
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684 times
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> Has anyone used any external devices with the HandyBoard that require a
> digital output from the microprocessor, such as pin PA6 or PA7? Currently
> there is an IR transmitter on PA6, and we want to use such an output to
> open/close a gripper of a robot arm. What's a quick and easy way to
> modify the board and obtain a digital output?
You might try using PortD (the header poking out of the lower right side
of the LCD)
/* set DDRC */
poke(0x1009,0x3c);
#define PD2 0b0000000000000100 /* aka MISO */
#define PD3 0b0000000000001000 /* MOSI */
#define PD4 0b0000000000010000 /* SCK */
#define PD5 0b0000000000100000 /* SS */
/* use like this */
bit_set(0x1008, PD2);
bit_clear(0x1008, PD2);
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Message is in Reply To:
 | | digital output
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| Has anyone used any external devices with the HandyBoard that require a digital output from the microprocessor, such as pin PA6 or PA7? Currently there is an IR transmitter on PA6, and we want to use such an output to open/close a gripper of a robot (...) (27 years ago, 2-May-97, to lugnet.robotics.handyboard)
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