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jLynx 2023-05-19 08:16:05 +12:00 • committed by GitHub
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commit 033c4e9a5b
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182
firmware/application/protocols/rds.cpp
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@ -35,129 +35,123 @@ namespace rds {
uint32_t make_block(uint32_t data, uint16_t offset) {
uint16_t CRC = 0;
uint8_t bit;
for (uint8_t i = 0; i < 16; i++) {
bit = (((data << i) & 0x8000) >> 15) ^ (CRC >> 9);
if (bit) CRC ^= 0b0011011100;
CRC = ((CRC << 1) | bit) & 0x3FF;
}
return (data << 10) | (CRC ^ offset);
}
// Boolean to binary
uint8_t b2b(const bool in) {
if (in)
return 1;
else
return 0;
if (in)
return 1;
else
return 0;
}
// Type 0B groups are like 0A groups but without alternative frequency data
RDSGroup make_0B_group(const uint16_t PI_code, const bool TP, const uint8_t PTY, const bool TA,
const bool MS, const bool DI, const uint8_t C, const std::string chars) {
RDSGroup group;
group.block[0] = PI_code;
group.block[1] = (0x0 << 12) | (1 << 11) | (b2b(TP) << 10) | ((PTY & 0x1F) << 5) | (b2b(TA) << 4) | (b2b(MS) << 3) | (b2b(DI) << 2) | (C & 3);
group.block[2] = PI_code;
group.block[3] = (chars[0] << 8) | chars[1];
return group;
RDSGroup make_0B_group(const uint16_t PI_code, const bool TP, const uint8_t PTY, const bool TA, const bool MS, const bool DI, const uint8_t C, const std::string chars) {
RDSGroup group;
group.block[0] = PI_code;
group.block[1] = (0x0 << 12) | (1 << 11) | (b2b(TP) << 10) | ((PTY & 0x1F) << 5) | (b2b(TA) << 4) | (b2b(MS) << 3) | (b2b(DI) << 2) | (C & 3);
group.block[2] = PI_code;
group.block[3] = (chars[0] << 8) | chars[1];
return group;
}
// For RadioText, up to 64 chars with 2A, 32 chars with 2B
RDSGroup make_2A_group(const uint16_t PI_code, const bool TP, const uint8_t PTY, const bool AB,
const uint8_t segment, const std::string chars) {
RDSGroup group;
group.block[0] = PI_code;
group.block[1] = (0x2 << 12) | (0 << 11) | (b2b(TP) << 10) | ((PTY & 0x1F) << 5) | (b2b(AB) << 4) | (segment & 15);
group.block[2] = (chars[0] << 8) | chars[1];
group.block[3] = (chars[2] << 8) | chars[3];
return group;
RDSGroup make_2A_group(const uint16_t PI_code, const bool TP, const uint8_t PTY, const bool AB, const uint8_t segment, const std::string chars) {
RDSGroup group;
group.block[0] = PI_code;
group.block[1] = (0x2 << 12) | (0 << 11) | (b2b(TP) << 10) | ((PTY & 0x1F) << 5) | (b2b(AB) << 4) | (segment & 15);
group.block[2] = (chars[0] << 8) | chars[1];
group.block[3] = (chars[2] << 8) | chars[3];
return group;
}
// Time and date - usually one message per minute - Month: 1~12 - Day: 1~31 - Hour/Minute: 0~59 - Local offset: -12/+12 from UTC
RDSGroup make_4A_group(const uint16_t PI_code, const bool TP, const uint8_t PTY,
const uint16_t year, const uint8_t month, const uint8_t day,
const uint8_t hour, const uint8_t minute, const int8_t local_offset) {
RDSGroup group;
uint32_t L = 0;
uint32_t day_code;
RDSGroup make_4A_group(const uint16_t PI_code, const bool TP, const uint8_t PTY, const uint16_t year, const uint8_t month, const uint8_t day, const uint8_t hour, const uint8_t minute, const int8_t local_offset) {
RDSGroup group;
uint32_t L = 0;
uint32_t day_code;
if ((month == 1) || (month == 2)) L = 1;
day_code = 14956 + day + (uint32_t)((float)(year - 1900 - L) * 365.25) + uint16_t((float)((month + 1) + L * 12) * 30.6001);
group.block[0] = PI_code;
group.block[1] = (0x4 << 12) | (0 << 11) | (b2b(TP) << 10) | ((PTY & 0x1F) << 5) | ((day_code & 0x18000) >> 15);
group.block[2] = ((day_code & 0x7FFF) << 1) | (hour >> 4);
group.block[3] = ((hour & 15) << 12) | ((minute & 0x3F) << 6) | (local_offset & 0x3F);
return group;
if ((month == 1) || (month == 2)) L = 1;
day_code = 14956 + day + (uint32_t)((float)(year - 1900 - L) * 365.25) + uint16_t((float)((month + 1) + L * 12) * 30.6001);
group.block[0] = PI_code;
group.block[1] = (0x4 << 12) | (0 << 11) | (b2b(TP) << 10) | ((PTY & 0x1F) << 5) | ((day_code & 0x18000) >> 15);
group.block[2] = ((day_code & 0x7FFF) << 1) | (hour >> 4);
group.block[3] = ((hour & 15) << 12) | ((minute & 0x3F) << 6) | (local_offset & 0x3F);
return group;
}
void gen_PSN(std::vector<RDSGroup>& frame, const std::string& psname, const RDS_flags * rds_flags) {
uint8_t c;
RDSGroup group;
frame.clear();
// 4 groups with 2 PSN characters in each
for (c = 0; c < 4; c++) {
group = make_0B_group(rds_flags->PI_code, rds_flags->TP, rds_flags->PTY, rds_flags->TA, rds_flags->MS, rds_flags->DI, c, psname.substr(c * 2, 2));
group.block[0] = make_block(group.block[0], RDS_OFFSET_A);
group.block[1] = make_block(group.block[1], RDS_OFFSET_B);
group.block[2] = make_block(group.block[2], RDS_OFFSET_Cp); // C' !
group.block[3] = make_block(group.block[3], RDS_OFFSET_D);
frame.emplace_back(group);
}
void gen_PSN(std::vector<RDSGroup>& frame, const std::string& psname, const RDS_flags* rds_flags) {
uint8_t c;
RDSGroup group;
frame.clear();
// 4 groups with 2 PSN characters in each
for (c = 0; c < 4; c++) {
group = make_0B_group(rds_flags->PI_code, rds_flags->TP, rds_flags->PTY, rds_flags->TA, rds_flags->MS, rds_flags->DI, c, psname.substr(c * 2, 2));
group.block[0] = make_block(group.block[0], RDS_OFFSET_A);
group.block[1] = make_block(group.block[1], RDS_OFFSET_B);
group.block[2] = make_block(group.block[2], RDS_OFFSET_Cp); // C' !
group.block[3] = make_block(group.block[3], RDS_OFFSET_D);
frame.emplace_back(group);
}
}
void gen_RadioText(std::vector<RDSGroup>& frame, const std::string& text, const bool AB, const RDS_flags * rds_flags) {
size_t c;
//RDSGroup * groups_ptr;
std::string radiotext_buffer = text;
size_t rt_length, group_count;
RDSGroup group;
void gen_RadioText(std::vector<RDSGroup>& frame, const std::string& text, const bool AB, const RDS_flags* rds_flags) {
size_t c;
// RDSGroup * groups_ptr;
std::string radiotext_buffer = text;
size_t rt_length, group_count;
RDSGroup group;
radiotext_buffer += 0x0D;
rt_length = radiotext_buffer.length();
rt_length = (rt_length + 3) & 0xFC;
group_count = rt_length >> 2; // 4 characters per group
radiotext_buffer += 0x0D;
rt_length = radiotext_buffer.length();
rt_length = (rt_length + 3) & 0xFC;
//groups_ptr = (RDSGroup*)chHeapAlloc(0, group_count * sizeof(RDSGroup));
group_count = rt_length >> 2; // 4 characters per group
frame.clear();
for (c = 0; c < group_count; c++) {
group = make_2A_group(rds_flags->PI_code, rds_flags->TP, rds_flags->PTY, AB, c, radiotext_buffer.substr(c * 4, 4));
group.block[0] = make_block(group.block[0], RDS_OFFSET_A);
group.block[1] = make_block(group.block[1], RDS_OFFSET_B);
group.block[2] = make_block(group.block[2], RDS_OFFSET_C);
group.block[3] = make_block(group.block[3], RDS_OFFSET_D);
frame.emplace_back(group);
}
// groups_ptr = (RDSGroup*)chHeapAlloc(0, group_count * sizeof(RDSGroup));
frame.clear();
for (c = 0; c < group_count; c++) {
group = make_2A_group(rds_flags->PI_code, rds_flags->TP, rds_flags->PTY, AB, c, radiotext_buffer.substr(c * 4, 4));
group.block[0] = make_block(group.block[0], RDS_OFFSET_A);
group.block[1] = make_block(group.block[1], RDS_OFFSET_B);
group.block[2] = make_block(group.block[2], RDS_OFFSET_C);
group.block[3] = make_block(group.block[3], RDS_OFFSET_D);
frame.emplace_back(group);
}
}
void gen_ClockTime(std::vector<RDSGroup>& frame, const RDS_flags * rds_flags,
const uint16_t year, const uint8_t month, const uint8_t day,
const uint8_t hour, const uint8_t minute, const int8_t local_offset) {
RDSGroup group;
group = make_4A_group(rds_flags->PI_code, rds_flags->TP, rds_flags->PTY, year, month, day, hour, minute, local_offset);
// Generate checkbits for each block
group.block[0] = make_block(group.block[0], RDS_OFFSET_A);
group.block[1] = make_block(group.block[1], RDS_OFFSET_B);
group.block[2] = make_block(group.block[2], RDS_OFFSET_C);
group.block[3] = make_block(group.block[3], RDS_OFFSET_D);
frame.clear();
frame.emplace_back(group);
void gen_ClockTime(std::vector<RDSGroup>& frame, const RDS_flags* rds_flags, const uint16_t year, const uint8_t month, const uint8_t day, const uint8_t hour, const uint8_t minute, const int8_t local_offset) {
RDSGroup group;
group = make_4A_group(rds_flags->PI_code, rds_flags->TP, rds_flags->PTY, year, month, day, hour, minute, local_offset);
// Generate checkbits for each block
group.block[0] = make_block(group.block[0], RDS_OFFSET_A);
group.block[1] = make_block(group.block[1], RDS_OFFSET_B);
group.block[2] = make_block(group.block[2], RDS_OFFSET_C);
group.block[3] = make_block(group.block[3], RDS_OFFSET_D);
frame.clear();
frame.emplace_back(group);
}
} /* namespace rds */