christoph/interrupt-handling-using-the-x86-apic
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This commit is contained in:
Christoph Urlacher
2023-03-03 15:40:25 +01:00
parent 8bec9735e3
commit 5349bca520
27 changed files with 804 additions and 2523 deletions
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code/pit_early_delay.cpp
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@ -2,7 +2,7 @@
void Pit::earlyDelay(uint16_t us) {
uint32_t counter = (static_cast<double>(BASE_FREQUENCY) / 1'000'000) * us;
controlPort.writeByte(0b110000); // Channel 0, mode 0
controlPort.writeByte(0b110000); // Channel 0, mode 0
dataPort0.writeByte(static_cast<uint8_t>(counter & 0xFF)); // Low byte
dataPort0.writeByte(static_cast<uint8_t>((counter >> 8) & 0xFF)); // High byte