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发表于 2024-9-14 11:33:58
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本帖最后由 大明狐 于 2024-9-14 12:09 编辑
Dont know actual reason, just according to the using fact.{:5_335:}
LCD12864 on parallel driver, OLED or TFT drived on simulate SPI for instance, under 8-bit mode, above 35MHz frequency,
they can be displayed correctly on STC8051U,
but incorrectly on Ai8051U, with same program, and same download parameters,
Those Displays were showing funny characters, wrong lines or wrong colors, even no light,
unless adding some small delay time in spi drivers, 2 nops at least, then becoming correct.
However, the Ai8051U chip I'm using was on the learningbox v1.2, but the STC8051U chip was on the different board.
So, right now, I'm not sure what actaully reason caused the diffrent speed above. Maybe some diffrents in the chips, maybe other something on board caused it.
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