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line and erasing is sort of working

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This commit is contained in:
Bjorn Einar Bjarntes 2021-12-18 17:42:58 +01:00
parent 6468a122df
commit 55462f53e4
1 changed files with 22 additions and 3 deletions
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23
src/main.c
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@ -65,23 +65,42 @@ void setPositionWhite(unsigned short x, BYTE y)
*(unsigned short*)(ad) = *(unsigned short*)(ad) | ma; *(unsigned short*)(ad) = *(unsigned short*)(ad) | ma;
} }
void setPositionBlack(long x, int y) void setPositionBlack(unsigned short x, BYTE y)
{ {
unsigned short ra = (320 * (BYTE)(y/8)) + (y & 7);
unsigned short ba = 8 * (BYTE)(x/8);
unsigned short ma = 255 - power(2,(7-(x & 7)));
unsigned short sa = 0x2000;
unsigned short ad = sa+ra+ba;
*(unsigned short*)(ad) = *(unsigned short*)(ad) & ma;
} }
unsigned short line;
int main(void) { int main(void) {
x = 160; x = 160;
y = 100; y = 100;
setAndClearHiRes(); setAndClearHiRes();
while (1) { for (line = 0;line<50;line++)
{
setPositionWhite(x,y); setPositionWhite(x,y);
x = x+1; x = x+1;
y = y + 1; y = y + 1;
} }
x = 160;
y = 100;
setAndClearHiRes();
for (line = 0;line<50;line++)
{
setPositionBlack(x,y);
x = x+1;
y = y + 1;
}
return 0; return 0;