16-bit I/O ILI9341 no sceen tearing effect on parallel master port(PMP) of 64pin PIC32MZ device
Автор: LeeIongi
Загружено: 2021-10-22
Просмотров: 267
Описание: The display do self scanning at approx 120Hz. The PMP of PIC able to output at approx 10MHz (max 20Mhz is possible on PMP port if PMWR is not considered but then it can't make the interfacing) and 16-bit on PMP address port using DMA, which result in approx 160 Megabits/s throughput to the display, which can then synchronous to the TE(tearing effect) line of the display and result in perfect image update on the screen. SPI version of ILI9341 only able to run at approx 60MHz or 60Mbits/s, which is much slower and will not be able to synchronous with the display scanning line. I wish I can explain the details on video, but I am not able to make moving picture explanation of how the display work currently, without moving picture diagram on how the screen scanning progress, it's very hard to explain why tearing effect occur and why faster communication with display can solve it.
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