Difference between revisions of "Kitchenlight"
(→Kitchenlight: max FPS) |
(→Timing) |
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| Line 19: | Line 19: | ||
>> = 20 ns + (40 * 8) * 5 ns | >> = 20 ns + (40 * 8) * 5 ns | ||
>> = ca 2 µs | >> = ca 2 µs | ||
| − | Setup delay min | + | >> Setup delay min |
30 * 6 => 180 Modules. | 30 * 6 => 180 Modules. | ||
| + | |||
180 * 32 bit > 5760 Bits per Image | 180 * 32 bit > 5760 Bits per Image | ||
| + | |||
Image / Control im wechsel => 11520 Bits | Image / Control im wechsel => 11520 Bits | ||
| + | |||
2µs / Bit > 23.040µs / Frame | 2µs / Bit > 23.040µs / Frame | ||
| + | |||
1 Sekunde / 23ms => 43 FPS | 1 Sekunde / 23ms => 43 FPS | ||
Revision as of 16:35, 21 October 2013
Contents
Kitchenlight
The 30 x 6 Pixels (?), 10bit RGB Color Display above the kitchen.
ShiftBrite 2.0 Documentation
Website: http://docs.macetech.com/doku.php/shiftbrite_2.0
Datasheet A6281 Driver: http://www.allegromicro.com/en/Products/Part_Numbers/6281/6281.pdf
- Serial port operates at up to 5 / 6 MHz - Clock: "100 ns One-Shot" (Page 3) - On CL_in CL_out is triggered internally for 100ns (Page 6) -
Timing
tsu = 20 ns + n × 5 ns >> = 20 ns + (40 * 8) * 5 ns >> = ca 2 µs >> Setup delay min
30 * 6 => 180 Modules.
180 * 32 bit > 5760 Bits per Image
Image / Control im wechsel => 11520 Bits
2µs / Bit > 23.040µs / Frame
1 Sekunde / 23ms => 43 FPS
Brightness Correction
Iout = Iout(max) × (Scale / 2 + 36.5) / 100
| 0 < Scale < 127 || default: Scale = 0
>> Default: LEDs shine with 36.5% brightness
SPI Info & STM32F4 Code
Wiki SPI [[1]]
U23 Github https://github.com/cccc/U23_2013_examples/tree/spi_example/bare_metal/04_spi
