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jLynx 2023-05-19 08:16:05 +12:00 • committed by GitHub
parent 7aca7ce74d
commit 033c4e9a5b
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599 changed files with 70746 additions and 66896 deletions
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96
firmware/application/rfm69.cpp
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@ -25,52 +25,52 @@
#include "portapack_shared_memory.hpp"
uint32_t RFM69::gen_frame(std::vector<uint8_t>& payload) {
CRC<16> crc { 0x1021, 0x1D0F, 0xFFFF };
std::vector<uint8_t> frame { };
uint8_t byte_out = 0;
// Preamble
// Really is 0xAA but the RFM69 skips the very last bit (bug ?)
// so the whole preamble is shifted right to simulate that
frame.insert(frame.begin(), num_preamble_, 0x55);
// Sync word
frame.push_back(sync_word_ >> 8);
frame.push_back(sync_word_ & 0xFF);
// Payload length
payload.insert(payload.begin(), payload.size());
crc.process_bytes(payload.data(), payload.size());
if (CRC_) {
payload.push_back(crc.checksum() >> 8);
payload.push_back(crc.checksum() & 0xFF);
}
// Manchester-encode payload
if (manchester_) {
for (auto byte : payload) {
for (uint32_t b = 0; b < 8; b++) {
byte_out <<= 2;
if (byte & 0x80)
byte_out |= 0b10;
else
byte_out |= 0b01;
if ((b & 3) == 3)
frame.push_back(byte_out);
byte <<= 1;
}
}
} else {
frame.insert(frame.end(), payload.begin(), payload.end());
}
memcpy(shared_memory.bb_data.data, frame.data(), frame.size());
// Copy for baseband
return frame.size();
CRC<16> crc{0x1021, 0x1D0F, 0xFFFF};
std::vector<uint8_t> frame{};
uint8_t byte_out = 0;
// Preamble
// Really is 0xAA but the RFM69 skips the very last bit (bug ?)
// so the whole preamble is shifted right to simulate that
frame.insert(frame.begin(), num_preamble_, 0x55);
// Sync word
frame.push_back(sync_word_ >> 8);
frame.push_back(sync_word_ & 0xFF);
// Payload length
payload.insert(payload.begin(), payload.size());
crc.process_bytes(payload.data(), payload.size());
if (CRC_) {
payload.push_back(crc.checksum() >> 8);
payload.push_back(crc.checksum() & 0xFF);
}
// Manchester-encode payload
if (manchester_) {
for (auto byte : payload) {
for (uint32_t b = 0; b < 8; b++) {
byte_out <<= 2;
if (byte & 0x80)
byte_out |= 0b10;
else
byte_out |= 0b01;
if ((b & 3) == 3)
frame.push_back(byte_out);
byte <<= 1;
}
}
} else {
frame.insert(frame.end(), payload.begin(), payload.end());
}
memcpy(shared_memory.bb_data.data, frame.data(), frame.size());
// Copy for baseband
return frame.size();
}