Heroway serial screen control FAQ (2)

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This section covers basic-graphics and curve display: why the first cut image disappears when cutting again (addresses are memory; the 0x82 command writes from the start address onward, so the next widget must not occupy previous addresses; plan address and data allocation clearly and send multiple data packets in one command for multiple cuts); one basic-graphics widget cannot mix different draw commands (stack multiple graphics addresses instead); thickening curves (use another channel one pixel apart; T5/T5L dynamic curve widgets support line width); saving curves (write the channel with 0x84, store data to a variable with 0x82, save to the database with 0x80, then read back and send to another channel with 0x84); channel mapping 0-7 to command bits 01/02/04/08/10/20/40/80 and X = 424x256/(Vmax-Vmin)/1000, e.g. V central 300 for a 200-500 range.