STM CircleOS forum / Slight improvement to LCD_DisplayChar function

TroyC3 · 2008-02-02 22:12:36

This change will remove the runtime multiplication.

First change the Character array from

static const u8 AsciiDotsTable[95 * 14 ] = {

to this

static const u8 AsciiDotsTable [95][14] = {

then change the call in LCD_DisplayChar
from

LCD_DrawChar( x, y, 7, (u8*)&AsciiDotsTable[ (Ascii-32) * 14 ], TextColor, BGndColor, CharMagniCoeff );

To this

LCD_DrawChar( x, y, 7, (u8*)&AsciiDotsTable[ (Ascii-32) ][0], TextColor, BGndColor, CharMagniCoeff );

Troy

TroyC3 · 2008-02-03 06:17:32

Okay my bad.

There is no improvement in the above code change, both produce the same assembly.

Troy

# 1 2008-02-02 22:12:36 Slight improvement to LCD_DisplayChar function

Slight improvement to LCD_DisplayChar function

# 2 2008-02-03 06:17:32 Slight improvement to LCD_DisplayChar function

Re: Slight improvement to LCD_DisplayChar function

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