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|−|These are the routines that turn the juice box in to a cheap serial graphics display. |+|
|−|unix_driver.pl is an example perl unix driver program. |+|
are to a . .
|−|winms_driver.pl is an example perl windows driver program. |+|
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|−|display.c is the c program on the juicebox. Look at this program for documentation. |+|
|−|planet571.jbp and stonehenge.jbp are sample backgrounds but any valid *.jbp can be used as a background. The ex |+|
a . a the color.
|−|driver displays a realtime cpu usage and memory usage on a scrolling grid as well as bargraphs. I alpha blended |+|
|−|ts so the graphics are partially transparent. I have written all of the 12 bit color routines so you have full access to the 4096 colors(I needed them for the alpha blending). |+|
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|−|Do the usual make -f display. mak, then load it onto the juice box |+|
the . , the .
|−|example from openocd: |+|
|−|load_binary /home/steve/juice_box/display/comm_1. bin 0x0c001000 |+|
|−|resume 0x0c001000 |+|
| || |
|−|or if you are one of the few with a fatjbox just put display.bin on your sd card and run. |+|
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|−|From another terminal window run the perl driver program ( note the two nonstandard modules Device::SerialPort 0 |+|
the (): .
|−|d Time::HiRes) |+|
|−|./unix_driver.pl planet571. jbp |+|
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|−|The perl driver program supplies the data over the serial port of the pc to the juicebox. |+|
|−|I assuming that you have a serial port attached to the juice box. |+|
the of the you a to the .
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define bitmaps on the pc, download them over the serial port and display them on the juicebox. The barg |+|
|−|raph and the grid are two intrinsic graphics types that the juice box display program already knows about. |+|
You can the . The the
| || |
|−|Future development: |+|
the the to , a . the the the for you can the your .
|−|I hope someone who is clever will rewrite these routines to only use the jtag port. The arm7 has a software bre |+|
|−|ak instruction,so it is possible to watch the jtag port and wait for the display program running on the juicebo |+|
|−|x to "break", then jtag data into a register and jtag a continue instruction. This would eliminate the costly s |+|
|−|erial port. You can build a jtag for less than $5. Using the jtag also eliminates the need for the sd/xd hack. |+|
|−|So you can use the juice box as a cheap graphics display for your projects like geeXboX or other HTPC. |+|
| || |
Display. tar.gz]] |+|
Revision as of 11:51, 8 February 2012
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