spicetools/acio2emu/firmware/bi2x.cpp

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2024-08-28 15:10:34 +00:00
#include "bi2x.h"
namespace acio2emu::firmware {
bool BI2XNode::handle_packet(const acio2emu::Packet &in, std::vector<uint8_t> &out) {
auto cur = in.payload.begin();
while ((cur + 1) < in.payload.end()) {
auto cmd = (cur[0] << 8) | cur[1];
out.push_back(*cur++);
out.push_back(*cur++);
out.push_back(0);
switch (cmd) {
case 2: // query firmware version
read_firmware_version(out);
cur = in.payload.end();
break;
case 16:
out.push_back(2);
cur = in.payload.end();
break;
case 800:
case 802:
case 19:
cur = in.payload.end();
break;
case 120:
out.push_back(3);
cur = in.payload.end();
break;
case 801:
out.push_back(33);
out.push_back(0);
cur = in.payload.end();
break;
case 784: // poll input
if (!read_input(out)) {
return false;
}
break;
case 785: { // write output
auto count = write_output(std::span{&*cur, static_cast<size_t>(in.payload.end() - cur)});
if (count < 0) {
return false;
}
cur += count;
break;
}
case 786:
cur += 4;
break;
default:
log_warning("bi2x", "unknown command: {}", cmd);
return false;
}
}
return true;
}
}