TheArchive/mayhem-firmware
1
0
Fork 0
mirror of https://github.com/portapack-mayhem/mayhem-firmware.git synced 2024-12-13 19:54:39 +00:00
Code Issues Packages Projects Releases Wiki Activity

RDS radiotext and time group generators

Browse Source
This commit is contained in:
furrtek 2016-12-08 21:08:53 +01:00
parent 28ea2179f4
commit 843c465c73
4 changed files with 111 additions and 40 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

112
firmware/application/rds.cpp
View File

@ -24,19 +24,24 @@
#include "portapack_shared_memory.hpp"
// RDS infos:
// One group = 4 blocks = 4 * 26 bits
// One block = 26 bits (16 bits data + 10 bits checkword)
// Sent MSB first
namespace rds {
uint32_t makeblock(uint32_t blockdata, uint16_t offset) {
uint32_t makeblock(uint32_t data, uint16_t offset) {
uint16_t CRC = 0;
uint8_t doinv;
uint8_t bit;
for (uint8_t i = 0; i < 16; i++) {
doinv = (((blockdata << i) & 0x8000) >> 15) ^ (CRC >> 9);
if (doinv) CRC ^= 0b0011011100;
CRC = ((CRC << 1) | doinv) & 0x3FF;
bit = (((data << i) & 0x8000) >> 15) ^ (CRC >> 9);
if (bit) CRC ^= 0b0011011100;
CRC = ((CRC << 1) | bit) & 0x3FF;
}
return (blockdata << 10) | (CRC ^ offset);
return (data << 10) | (CRC ^ offset);
}
// Todo:
@ -52,35 +57,50 @@ uint8_t b2b(const bool in) {
return 0;
}
void make_0B_group(uint32_t group[], const uint16_t PI_code, const bool TP, const uint8_t PTY, const bool TA,
// Type 0B groups are like 0A groups but without alternative frequency data
void make_0B_group(uint32_t blocks[], 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 char * chars) {
group[0] = PI_code;
group[1] = (0x0 << 12) | (1 << 11) | (b2b(TP) << 10) | (PTY << 5) | (b2b(TA) << 4) | (b2b(MS) << 3) | (b2b(DI) << 2) | (C & 3);
group[2] = PI_code;
group[3] = (chars[0] << 8) | chars[1];
blocks[0] = PI_code;
blocks[1] = (0x0 << 12) | (1 << 11) | (b2b(TP) << 10) | ((PTY & 0x1F) << 5) | (b2b(TA) << 4) | (b2b(MS) << 3) | (b2b(DI) << 2) | (C & 3);
blocks[2] = PI_code;
blocks[3] = (chars[0] << 8) | chars[1];
}
void make_2A_group(uint32_t group[], const uint16_t PI_code, const bool TP, const uint8_t PTY, const bool AB,
// For RadioText, up to 64 chars with 2A, 32 chars with 2B
void make_2A_group(uint32_t blocks[], const uint16_t PI_code, const bool TP, const uint8_t PTY, const bool AB,
const uint8_t segment, const char * chars) {
group[0] = PI_code;
group[1] = (0x0 << 12) | (1 << 11) | (b2b(TP) << 10) | (PTY << 5) | (b2b(AB) << 4) | (segment & 15);
group[2] = (chars[0] << 8) | chars[1];
group[3] = (chars[2] << 8) | chars[3];
blocks[0] = PI_code;
blocks[1] = (0x2 << 12) | (0 << 11) | (b2b(TP) << 10) | ((PTY & 0x1F) << 5) | (b2b(AB) << 4) | (segment & 15);
blocks[2] = (chars[0] << 8) | chars[1];
blocks[3] = (chars[2] << 8) | chars[3];
}
uint16_t gen_PSN(const char * psname, const uint8_t pty) {
// Time and date - usually one message per minute - Month: 1~12 - Day: 1~31 - Hour/Minute: 0~59 - Local offset: -12/+12 from UTC
void make_4A_group(uint32_t blocks[], 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) {
uint32_t L = 0;
uint32_t day_code;
if ((month == 1) || (month == 2)) L = 1;
day_code = 14956 + day + (uint32_t)((float)(year - L) * 365.25) + uint16_t(((month + 1) * L * 12) * 30.6001);
blocks[0] = PI_code;
blocks[1] = (0x4 << 12) | (0 << 11) | (b2b(TP) << 10) | ((PTY & 0x1F) << 5) | ((day_code & 0x18000) >> 15);
blocks[2] = ((day_code & 0x7FFF) << 1) | (hour >> 4);
blocks[3] = ((hour & 15) << 12) | ((minute & 0x3F) << 6) | (local_offset & 0x3F);
}
uint16_t gen_PSN(const char * psname, const RDS_flags * rds_flags) {
uint8_t c;
uint32_t group[4][4] = { 0 };
// 4 groups with 2 PSN characters in each
make_0B_group(&group[0][0], 0xF849, true, pty, false, true, false, 0, &psname[0]);
make_0B_group(&group[1][0], 0xF849, true, pty, false, true, false, 1, &psname[2]);
make_0B_group(&group[2][0], 0xF849, true, pty, false, true, false, 2, &psname[4]);
make_0B_group(&group[3][0], 0xF849, true, pty, false, true, false, 3, &psname[6]);
for (c = 0; c < 4; c++)
make_0B_group(&group[c][0], rds_flags->PI_code, rds_flags->TP, rds_flags->PTY, rds_flags->TA, rds_flags->MS, rds_flags->DI, c, &psname[c * 2]);
// Generate checkbits for all blocks
// Generate checkbits for each block of each group
for (c = 0; c < 4; c++) {
group[c][0] = makeblock(group[c][0], RDS_OFFSET_A);
group[c][1] = makeblock(group[c][1], RDS_OFFSET_B);
@ -90,36 +110,38 @@ uint16_t gen_PSN(const char * psname, const uint8_t pty) {
uint32_t * tx_data_u32 = (uint32_t*)shared_memory.tx_data;
// Copy to tx_data for baseband
for (c = 0; c < 4 * 4; c++)
tx_data_u32[c] = group[c >> 2][c & 3];
return 4 * 4 * 26;
}
uint16_t gen_RadioText(const char * radiotext, const uint8_t pty) {
uint16_t gen_RadioText(const char * text, const bool AB, const RDS_flags * rds_flags) {
size_t c, i;
uint32_t * group;
char radiotext_buffer[65] = { 0 };
uint8_t rtlen, groups;
strcpy(radiotext_buffer, radiotext);
strncpy(radiotext_buffer, text, 64);
rtlen = strlen(radiotext_buffer);
radiotext_buffer[rtlen] = 0x0D;
// Pad to multiple of 4
// Pad message with spaces to a multiple of 4 characters
while (rtlen & 3)
radiotext_buffer[rtlen++] = ' ';
// End message with Carriage Return, as required
if (rtlen < 64) radiotext_buffer[rtlen] = 0x0D;
groups = rtlen >> 2; // 4 characters per group
group = (uint32_t*)chHeapAlloc(0x0, 4 * groups * sizeof(uint32_t));
group = (uint32_t*)chHeapAlloc(0, 4 * groups * sizeof(uint32_t));
for (c = 0; c < groups; c++)
make_2A_group(&group[c << 2], 0xF849, true, pty, false, c, &radiotext_buffer[c * 4]);
make_2A_group(&group[c * 4], rds_flags->PI_code, rds_flags->TP, rds_flags->PTY, AB, c, &radiotext_buffer[c * 4]);
// Generate checkbits
// Generate checkbits for each block of each group
for (c = 0; c < groups; c++) {
i = c * 4;
group[i + 0] = makeblock(group[i + 0], RDS_OFFSET_A);
@ -130,10 +152,36 @@ uint16_t gen_RadioText(const char * radiotext, const uint8_t pty) {
uint32_t * tx_data_u32 = (uint32_t*)shared_memory.tx_data;
// Copy to tx_data for baseband
for (c = 0; c < (groups * 4); c++)
tx_data_u32[c] = group[c];
chHeapFree(group);
return groups * 4 * 26;
}
uint16_t gen_ClockTime(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) {
uint8_t c;
uint32_t group[4] = { 0 };
make_4A_group(&group[0], rds_flags->PI_code, rds_flags->TP, rds_flags->PTY, year, month, day, hour, minute, local_offset);
// Generate checkbits for each block
group[0] = makeblock(group[0], RDS_OFFSET_A);
group[1] = makeblock(group[1], RDS_OFFSET_B);
group[2] = makeblock(group[2], RDS_OFFSET_C);
group[3] = makeblock(group[3], RDS_OFFSET_D);
uint32_t * tx_data_u32 = (uint32_t*)shared_memory.tx_data;
// Copy to tx_data for baseband
for (c = 0; c < 4; c++)
tx_data_u32[c] = group[c];
return 4 * 26;
}
} /* namespace rds */

20
firmware/application/rds.hpp
View File

@ -35,14 +35,30 @@ namespace rds {
#define RDS_OFFSET_Cp 0b1101010000
#define RDS_OFFSET_D 0b0110110100
struct RDS_flags {
uint16_t PI_code;
bool TP;
uint8_t PTY;
bool TA;
bool MS;
bool DI;
};
uint32_t makeblock(uint32_t blockdata, uint16_t offset);
uint8_t b2b(const bool in);
void make_0B_group(uint32_t 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 char * chars);
void make_2A_group(uint32_t group[], const uint16_t PI_code, const bool TP, const uint8_t PTY, const bool AB,
const uint8_t segment, const char * chars);
uint16_t gen_PSN(const char * psname, const uint8_t pty);
uint16_t gen_RadioText(const char * radiotext, const uint8_t pty);
void make_4A_group(uint32_t blocks[], 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);
uint16_t gen_PSN(const char * psname, const RDS_flags * rds_flags);
uint16_t gen_RadioText(const char * text, const bool AB, const RDS_flags * rds_flags);
uint16_t gen_ClockTime(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);
} /* namespace rds */

15
firmware/application/ui_rds.cpp
View File

@ -22,7 +22,6 @@
#include "ui_rds.hpp"
#include "rds.hpp"
#include "portapack.hpp"
#include "baseband_api.hpp"
#include "portapack_shared_memory.hpp"
@ -115,24 +114,28 @@ RDSView::RDSView(NavigationView& nav) {
options_countrycode.set_selected_index(18); // France
options_coverage.set_selected_index(0); // Local
button_editpsn.on_select = [this,&nav](Button&){
options_pty.on_change = [this](size_t, int32_t v) {
rds_flags.PTY = v;
};
button_editpsn.on_select = [this,&nav](Button&) {
textentry(nav, PSN, 8);
};
button_txpsn.on_select = [this](Button&){
button_txpsn.on_select = [this](Button&) {
if (txing) {
button_txpsn.set_text("PSN");
button_txradiotext.set_text("Radiotext");
transmitter_model.disable();
txing = false;
} else {
message_length = gen_PSN(PSN, options_pty.selected_index());
message_length = gen_PSN(PSN, &rds_flags);
button_txpsn.set_text("STOP");
txing = true;
start_tx();
}
};
button_editradiotext.on_select = [this,&nav](Button&){
button_editradiotext.on_select = [this, &nav](Button&){
textentry(nav, RadioText, 24);
};
button_txradiotext.on_select = [this](Button&){
@ -142,7 +145,7 @@ RDSView::RDSView(NavigationView& nav) {
transmitter_model.disable();
txing = false;
} else {
message_length = gen_RadioText(RadioText, options_pty.selected_index());
message_length = gen_RadioText(RadioText, 0, &rds_flags);
button_txradiotext.set_text("STOP");
txing = true;
start_tx();

4
firmware/application/ui_rds.hpp
View File

@ -27,6 +27,9 @@
#include "ui_receiver.hpp"
#include "ui_textentry.hpp"
#include "message.hpp"
#include "rds.hpp"
using namespace rds;
namespace ui {
@ -44,6 +47,7 @@ private:
char PSN[9];
char RadioText[25];
bool txing = false;
RDS_flags rds_flags;
uint16_t message_length;