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Messages - techtoys

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16
Discussion - Hardware / Re: BT81x to support 1366*768 LCD?
« on: January 18, 2019, 12:13:38 PM »
Hi

Thank you for the quick response. You have mentioned "The EVE series of ICs do not include a frame buffer, they dynamically clock out each computed pixel on the screen." In this case, the concept of framebuffer to store/swap a frame cannot apply. Therefore 1366*768*2bytes for a full frame can be ignored, right?

If the GRAM is not a frame buffer, suppose I have some bitmap data as an array pointed by uint16_t *fb, where this bitmap data should be copied to Eve in order to get it displayed?

Asking this question because 1366*768*2 = 2MBytes > 1MBytes CGRAM in Eve. At the beginning I was worried by this equation.

A frame frame of 30Hz may be enough good but a test is required. Is there any Youtube video or something to show your 10” HD demo at Electronica 2018 (1280x800 60Hz)?

Best Regards

John

17
Discussion - Hardware / BT81x to support 1366*768 LCD?
« on: January 16, 2019, 09:26:21 AM »
It is stated on datasheet of BT81x that the max PLL frequency reaches 72MHz. Regarding this I wish to ask if BT81x can support a LCD of 1366*768 with pixel clock typ. @ 70MHz?

Attached jpg is a screen shot from the LCD's datasheet on timing data.


18
Hi

I am trying to export a project from ESD 4.5. Browsing all .h files but find no c++ option is available. This is just a simple directive

#ifdef __cplusplus
extern "C" {
#endif

....
#ifdef __cplusplus
}
#endif

to enable an exported project to be compiled in C++ compiler. Is there any option to add this in ESD 4.x?

John

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