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Corrects centralised ADB decoder.

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I still think it's appropriate to do this in only a single place, given that using it is optional.
This commit is contained in:
Thomas Harte 2021-02-14 20:41:05 -05:00
parent 52c38e72f6
commit 6e53b4c507
2 changed files with 10 additions and 3 deletions
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9
Machines/Apple/ADB/Bus.cpp
View File

@ -50,7 +50,7 @@ void Bus::set_device_output(size_t device_id, bool output) {
device->adb_bus_did_observe_event(Event::Attention);
}
shift_register_ = 1;
printf("!!! atn\n");
phase_ = Phase::AttentionCapture;
} else if(low_microseconds < 50.0) {
shift(1);
} else if(low_microseconds < 72.0) {
@ -72,14 +72,17 @@ void Bus::set_device_output(size_t device_id, bool output) {
void Bus::shift(unsigned int value) {
shift_register_ = (shift_register_ << 1) | value;
printf("!!! %d\n", value);
// Trigger a byte whenever a start bit hits bit 8.
if(shift_register_ & 0x100) {
for(auto device: devices_) {
device->adb_bus_did_observe_event(Event::Byte, uint8_t(shift_register_));
}
shift_register_ = 1;
// Expect a real start bit only if moving from attention capture to packet
// capture. Otherwise adopt an implied start bit.
shift_register_ = phase_ == Phase::PacketCapture;
phase_ = Phase::PacketCapture;
}
}

4
Machines/Apple/ADB/Bus.hpp
View File

@ -159,6 +159,10 @@ class Bus {
size_t next_device_id_ = 0;
inline void shift(unsigned int);
enum class Phase {
PacketCapture,
AttentionCapture
} phase_ = Phase::AttentionCapture;
};
}