BRNSystems/brnQuanFW
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Use stepping instead of branching using modulus

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Modulus operations are very costly and generally should be avoided.
They also take a few bytes.

This version is actually a quite faster.
This commit is contained in:
Juan Antonio
2023-12-09 01:27:44 +01:00
committed by egzumer
parent cfc4763dd1
commit 1203fdf0ca
1 changed files with 8 additions and 8 deletions
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12
app/spectrum.c
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@@ -944,14 +944,14 @@ static void RenderStill() {
const uint8_t METER_PAD_LEFT = 3; const uint8_t METER_PAD_LEFT = 3;
for (int i = 0; i < 121; i++) { memset(&gFrameBuffer[2][METER_PAD_LEFT], 0b00010000, 121);
if (i % 10 == 0) {
gFrameBuffer[2][i + METER_PAD_LEFT] = 0b01110000; for (int i = 0; i < 121; i+=5) {
} else if (i % 5 == 0) {
gFrameBuffer[2][i + METER_PAD_LEFT] = 0b00110000; gFrameBuffer[2][i + METER_PAD_LEFT] = 0b00110000;
} else {
gFrameBuffer[2][i + METER_PAD_LEFT] = 0b00010000;
} }
for (int i = 0; i < 121; i+=10) {
gFrameBuffer[2][i + METER_PAD_LEFT] = 0b01110000;
} }
uint8_t x = Rssi2PX(scanInfo.rssi, 0, 121); uint8_t x = Rssi2PX(scanInfo.rssi, 0, 121);