WT32-SC01 -80MHz SPI? #1462
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Hi, a question: I bought the WT32-SC01, which is board with ESP-Wrover and a ST7796 display. Link to "Datasheet" : http://www.wireless-tag.com/wp-content/uploads/2021/01/WT32-SC01DataSheetV3.3-2-with-nuts.pdf Thank you in advance! |
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The WT32-SC01 display is wired to the HSPI pins. By default the TFT_eSPI library uses the VSPI port and these will get routed through an internal multiplexer which degrades performance. To avoid the multiplexer use this setting in the setup file. Note that the ST7796 display is actually only rated at 16MHz maximum SPI clock, however most displays run at 40MHz. Some may run at 80MHz but this is 5x overclocking and it is likely to be unreliable. |
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Thank you! p.s. This library is great! |
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The WT32-SC01 display is wired to the HSPI pins. By default the TFT_eSPI library uses the VSPI port and these will get routed through an internal multiplexer which degrades performance. To avoid the multiplexer use this setting in the setup file.
Note that the ST7796 display is actually only rated at 16MHz maximum SPI clock, however most displays run at 40MHz. Some may run at 80MHz but this is 5x overclocking and it is likely to be unreliable.