commit dafe1910db6f87d9024159025c3cd59852567e90 Author: s3lph Date: Sat Apr 22 20:17:56 2023 +0200 Implement AFSK with pre-generated sinus table diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..03f4a3c --- /dev/null +++ b/.gitignore @@ -0,0 +1 @@ +.pio diff --git a/create_sinus_tables.py b/create_sinus_tables.py new file mode 100755 index 0000000..de2a6e2 --- /dev/null +++ b/create_sinus_tables.py @@ -0,0 +1,90 @@ +#!/usr/bin/env python3 + +import math +import os + + +BAUD = 1200 +BAUD_MARK = 1200 +BAUD_SPACE = 2200 + +N_SHIFTS = BAUD // math.gcd(BAUD, BAUD_MARK, BAUD_SPACE) + + +sinus1200 = [] +sinus2200 = [] + +for t in range(int(1000000/BAUD_MARK)): + sinus1200.append(int((math.sin((t * BAUD_MARK / 1000000) * 2*math.pi) + 1) * 128)) +for t in range(int(1000000/BAUD_SPACE)): + sinus2200.append(int((math.sin((t * BAUD_SPACE / 1000000) * 2*math.pi) + 1) * 128)) + +phaseShift1200 = [int((N_SHIFTS-i) * 1000000 / (6*BAUD_MARK)) % len(sinus1200) for i in range(N_SHIFTS)] +phaseShift2200 = [int((N_SHIFTS-i) * 1000000 / (6*BAUD_SPACE)) % len(sinus2200) for i in range(N_SHIFTS)] + +with open(os.path.join(os.path.dirname(__file__), 'include/afsk_sinus.hpp'), 'w') as f: + f.write(f''' +#include + +#define BAUD {BAUD} +#define BAUD_MARK {BAUD_MARK} +#define BAUD_SPACE {BAUD_SPACE} +#define INV_BAUD {int(1000000/BAUD)} +#define N_SHIFTS {N_SHIFTS} +#define N_SINUS_1200 {len(sinus1200)} +#define N_SINUS_2200 {len(sinus2200)} + +const PROGMEM uint8_t SINUS1200[] = {{ {', '.join([str(i) for i in sinus1200])} }}; +const PROGMEM uint8_t SINUS2200[] = {{ {', '.join([str(i) for i in sinus2200])} }}; +const size_t PS1200[] = {{ {', '.join([str(i) for i in phaseShift1200])} }}; +const size_t PS2200[] = {{ {', '.join([str(i) for i in phaseShift2200])} }}; + +void sendOne(uint32_t *us, uint8_t *phaseShift) {{ + uint32_t t; + while ((t = micros() - *us) < INV_BAUD) {{ + OUT_PORT = pgm_read_byte(&SINUS1200[ (PS1200[*phaseShift] + t) % N_SINUS_1200 ]); + }} + *us += INV_BAUD; +}} + +void sendZero(uint32_t *us, uint8_t *phaseShift) {{ + uint32_t t; + while ((t = micros() - *us) < INV_BAUD) {{ + OUT_PORT = pgm_read_byte(&SINUS2200[ (PS2200[*phaseShift] + t) % N_SINUS_2200 ]); + }} + (*phaseShift)++; + *us += INV_BAUD; +}} + +''') + + +#from matplotlib import pyplot as plt +# +#phase_shift = 0 +# +#signal = [] +# +# +#def one(): +# global phase_shift +# for i in range(int(1000000/BAUD)): +# signal.append(sinus1200[int((phaseShift1200[phase_shift]+i) % len(sinus1200))]) +# +#def zero(): +# global phase_shift +# for i in range(int(1000000/BAUD)): +# signal.append(sinus2200[int((phaseShift2200[phase_shift]+i) % len(sinus2200))]) +# phase_shift = (phase_shift + 1) % len(phaseShift2200) +# +# +#for i in range(20): +# if i % 3 == 0: +# one() +# else: +# zero() +# +# +#plt.plot(signal) +#plt.vlines([i*int(1000000/BAUD) for i in range(21)], ymin=0, ymax=255, color='red') +#plt.show() diff --git a/include/README b/include/README new file mode 100644 index 0000000..194dcd4 --- /dev/null +++ b/include/README @@ -0,0 +1,39 @@ + +This directory is intended for project header files. + +A header file is a file containing C declarations and macro definitions +to be shared between several project source files. You request the use of a +header file in your project source file (C, C++, etc) located in `src` folder +by including it, with the C preprocessing directive `#include'. + +```src/main.c + +#include "header.h" + +int main (void) +{ + ... +} +``` + +Including a header file produces the same results as copying the header file +into each source file that needs it. Such copying would be time-consuming +and error-prone. With a header file, the related declarations appear +in only one place. If they need to be changed, they can be changed in one +place, and programs that include the header file will automatically use the +new version when next recompiled. The header file eliminates the labor of +finding and changing all the copies as well as the risk that a failure to +find one copy will result in inconsistencies within a program. + +In C, the usual convention is to give header files names that end with `.h'. +It is most portable to use only letters, digits, dashes, and underscores in +header file names, and at most one dot. + +Read more about using header files in official GCC documentation: + +* Include Syntax +* Include Operation +* Once-Only Headers +* Computed Includes + +https://gcc.gnu.org/onlinedocs/cpp/Header-Files.html diff --git a/include/afsk_sinus.hpp b/include/afsk_sinus.hpp new file mode 100644 index 0000000..b39f490 --- /dev/null +++ b/include/afsk_sinus.hpp @@ -0,0 +1,33 @@ + +#include + +#define BAUD 1200 +#define BAUD_MARK 1200 +#define BAUD_SPACE 2200 +#define INV_BAUD 833 +#define N_SHIFTS 6 +#define N_SINUS_1200 833 +#define N_SINUS_2200 454 + +const PROGMEM uint8_t SINUS1200[] = { 128, 128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 144, 145, 146, 147, 148, 149, 150, 151, 151, 152, 153, 154, 155, 156, 157, 158, 159, 160, 161, 162, 163, 164, 165, 166, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 176, 176, 177, 178, 179, 180, 181, 182, 183, 183, 184, 185, 186, 187, 188, 189, 189, 190, 191, 192, 193, 194, 194, 195, 196, 197, 198, 199, 199, 200, 201, 202, 202, 203, 204, 205, 206, 206, 207, 208, 209, 209, 210, 211, 212, 212, 213, 214, 214, 215, 216, 217, 217, 218, 219, 219, 220, 221, 221, 222, 223, 223, 224, 224, 225, 226, 226, 227, 228, 228, 229, 229, 230, 230, 231, 232, 232, 233, 233, 234, 234, 235, 235, 236, 236, 237, 237, 238, 238, 239, 239, 240, 240, 241, 241, 242, 242, 242, 243, 243, 244, 244, 245, 245, 245, 246, 246, 246, 247, 247, 247, 248, 248, 248, 249, 249, 249, 250, 250, 250, 250, 251, 251, 251, 251, 252, 252, 252, 252, 253, 253, 253, 253, 253, 254, 254, 254, 254, 254, 254, 254, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 254, 254, 254, 254, 254, 254, 254, 253, 253, 253, 253, 253, 253, 252, 252, 252, 252, 251, 251, 251, 251, 250, 250, 250, 250, 249, 249, 249, 248, 248, 248, 247, 247, 247, 246, 246, 246, 245, 245, 244, 244, 244, 243, 243, 242, 242, 241, 241, 241, 240, 240, 239, 239, 238, 238, 237, 237, 236, 236, 235, 235, 234, 234, 233, 233, 232, 231, 231, 230, 230, 229, 229, 228, 227, 227, 226, 226, 225, 224, 224, 223, 222, 222, 221, 220, 220, 219, 218, 218, 217, 216, 216, 215, 214, 213, 213, 212, 211, 211, 210, 209, 208, 208, 207, 206, 205, 205, 204, 203, 202, 201, 201, 200, 199, 198, 197, 197, 196, 195, 194, 193, 193, 192, 191, 190, 189, 188, 187, 187, 186, 185, 184, 183, 182, 181, 181, 180, 179, 178, 177, 176, 175, 174, 173, 173, 172, 171, 170, 169, 168, 167, 166, 165, 164, 163, 162, 162, 161, 160, 159, 158, 157, 156, 155, 154, 153, 152, 151, 150, 149, 148, 147, 146, 145, 144, 144, 143, 142, 141, 140, 139, 138, 137, 136, 135, 134, 133, 132, 131, 130, 129, 128, 127, 126, 125, 124, 123, 122, 121, 120, 119, 118, 118, 117, 116, 115, 114, 113, 112, 111, 110, 109, 108, 107, 106, 105, 104, 103, 102, 101, 100, 99, 98, 98, 97, 96, 95, 94, 93, 92, 91, 90, 89, 88, 87, 86, 86, 85, 84, 83, 82, 81, 80, 79, 78, 77, 77, 76, 75, 74, 73, 72, 71, 70, 70, 69, 68, 67, 66, 65, 64, 64, 63, 62, 61, 60, 59, 59, 58, 57, 56, 55, 55, 54, 53, 52, 51, 51, 50, 49, 48, 48, 47, 46, 45, 45, 44, 43, 42, 42, 41, 40, 40, 39, 38, 38, 37, 36, 36, 35, 34, 34, 33, 32, 32, 31, 30, 30, 29, 28, 28, 27, 27, 26, 25, 25, 24, 24, 23, 23, 22, 22, 21, 20, 20, 19, 19, 18, 18, 17, 17, 16, 16, 15, 15, 15, 14, 14, 13, 13, 12, 12, 12, 11, 11, 10, 10, 10, 9, 9, 8, 8, 8, 7, 7, 7, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 6, 6, 6, 6, 7, 7, 7, 8, 8, 8, 9, 9, 10, 10, 10, 11, 11, 12, 12, 12, 13, 13, 14, 14, 15, 15, 15, 16, 16, 17, 17, 18, 18, 19, 19, 20, 20, 21, 22, 22, 23, 23, 24, 24, 25, 25, 26, 27, 27, 28, 28, 29, 30, 30, 31, 32, 32, 33, 34, 34, 35, 36, 36, 37, 38, 38, 39, 40, 40, 41, 42, 42, 43, 44, 45, 45, 46, 47, 48, 48, 49, 50, 51, 51, 52, 53, 54, 55, 55, 56, 57, 58, 59, 59, 60, 61, 62, 63, 64, 64, 65, 66, 67, 68, 69, 70, 70, 71, 72, 73, 74, 75, 76, 77, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118, 118, 119, 120, 121, 122, 123, 124, 125, 126 }; +const PROGMEM uint8_t SINUS2200[] = { 128, 129, 131, 133, 135, 136, 138, 140, 142, 143, 145, 147, 149, 150, 152, 154, 156, 157, 159, 161, 162, 164, 166, 168, 169, 171, 173, 174, 176, 177, 179, 181, 182, 184, 185, 187, 189, 190, 192, 193, 195, 196, 198, 199, 201, 202, 204, 205, 206, 208, 209, 210, 212, 213, 214, 216, 217, 218, 219, 221, 222, 223, 224, 225, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239, 239, 240, 241, 242, 243, 243, 244, 245, 246, 246, 247, 248, 248, 249, 249, 250, 250, 251, 251, 252, 252, 253, 253, 253, 254, 254, 254, 254, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 254, 254, 254, 254, 253, 253, 253, 252, 252, 251, 251, 250, 250, 249, 249, 248, 248, 247, 246, 246, 245, 244, 244, 243, 242, 241, 241, 240, 239, 238, 237, 236, 235, 234, 233, 232, 231, 230, 229, 228, 227, 226, 225, 223, 222, 221, 220, 219, 217, 216, 215, 213, 212, 211, 209, 208, 207, 205, 204, 202, 201, 200, 198, 197, 195, 194, 192, 191, 189, 187, 186, 184, 183, 181, 180, 178, 176, 175, 173, 171, 170, 168, 166, 165, 163, 161, 159, 158, 156, 154, 153, 151, 149, 147, 146, 144, 142, 140, 139, 137, 135, 133, 132, 130, 128, 126, 124, 123, 121, 119, 117, 116, 114, 112, 110, 109, 107, 105, 103, 102, 100, 98, 96, 95, 93, 91, 90, 88, 86, 85, 83, 81, 80, 78, 76, 75, 73, 72, 70, 68, 67, 65, 64, 62, 61, 59, 58, 56, 55, 53, 52, 50, 49, 48, 46, 45, 44, 42, 41, 40, 38, 37, 36, 35, 33, 32, 31, 30, 29, 28, 27, 25, 24, 23, 22, 21, 20, 19, 18, 18, 17, 16, 15, 14, 13, 13, 12, 11, 10, 10, 9, 8, 8, 7, 6, 6, 5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 2, 2, 2, 3, 3, 3, 4, 4, 5, 5, 6, 7, 7, 8, 8, 9, 10, 10, 11, 12, 13, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 34, 35, 36, 37, 39, 40, 41, 42, 44, 45, 47, 48, 49, 51, 52, 54, 55, 56, 58, 59, 61, 62, 64, 66, 67, 69, 70, 72, 73, 75, 77, 78, 80, 82, 83, 85, 87, 88, 90, 92, 93, 95, 97, 98, 100, 102, 104, 105, 107, 109, 111, 112, 114, 116, 118, 119, 121, 123, 125 }; +const size_t PS1200[] = { 0, 694, 555, 416, 277, 138 }; +const size_t PS2200[] = { 0, 378, 303, 227, 151, 75 }; + +void sendOne(uint32_t *us, uint8_t *phaseShift) { + uint32_t t; + while ((t = micros() - *us) < INV_BAUD) { + OUT_PORT = pgm_read_byte(&SINUS1200[ (PS1200[*phaseShift] + t) % N_SINUS_1200 ]); + } + *us += INV_BAUD; +} + +void sendZero(uint32_t *us, uint8_t *phaseShift) { + uint32_t t; + while ((t = micros() - *us) < INV_BAUD) { + OUT_PORT = pgm_read_byte(&SINUS2200[ (PS2200[*phaseShift] + t) % N_SINUS_2200 ]); + } + (*phaseShift)++; + *us += INV_BAUD; +} + diff --git a/lib/README b/lib/README new file mode 100644 index 0000000..6debab1 --- /dev/null +++ b/lib/README @@ -0,0 +1,46 @@ + +This directory is intended for project specific (private) libraries. +PlatformIO will compile them to static libraries and link into executable file. + +The source code of each library should be placed in a an own separate directory +("lib/your_library_name/[here are source files]"). + +For example, see a structure of the following two libraries `Foo` and `Bar`: + +|--lib +| | +| |--Bar +| | |--docs +| | |--examples +| | |--src +| | |- Bar.c +| | |- Bar.h +| | |- library.json (optional, custom build options, etc) https://docs.platformio.org/page/librarymanager/config.html +| | +| |--Foo +| | |- Foo.c +| | |- Foo.h +| | +| |- README --> THIS FILE +| +|- platformio.ini +|--src + |- main.c + +and a contents of `src/main.c`: +``` +#include +#include + +int main (void) +{ + ... +} + +``` + +PlatformIO Library Dependency Finder will find automatically dependent +libraries scanning project source files. + +More information about PlatformIO Library Dependency Finder +- https://docs.platformio.org/page/librarymanager/ldf.html diff --git a/platformio.ini b/platformio.ini new file mode 100644 index 0000000..3fb21ef --- /dev/null +++ b/platformio.ini @@ -0,0 +1,15 @@ +; PlatformIO Project Configuration File +; +; Build options: build flags, source filter +; Upload options: custom upload port, speed and extra flags +; Library options: dependencies, extra library storages +; Advanced options: extra scripting +; +; Please visit documentation for the other options and examples +; https://docs.platformio.org/page/projectconf.html + +[env:main] +platform = atmelavr +board = uno +framework = arduino +build_flags = -DOUT_PORT=PORTD -DOUT_DDR=DDRD diff --git a/src/main.cpp b/src/main.cpp new file mode 100644 index 0000000..84e3ab1 --- /dev/null +++ b/src/main.cpp @@ -0,0 +1,42 @@ + +#include + +#include "afsk_sinus.hpp" + + +extern void sendOne(uint32_t *us, uint8_t *phaseShift); +extern void sendZero(uint32_t *us, uint8_t *phaseShift); + +uint32_t m = 0; +uint8_t phaseShift = 0; + +void sendBell202(uint8_t byt) { + for (uint8_t i = 0; i < 8; ++i) { + if ((byt >> i) & 1) { + sendOne(&m, &phaseShift); + } else { + sendZero(&m, &phaseShift); + } + } +} + +void sendBell202buf(uint8_t *buf, size_t len) { + m = micros(); + for (size_t i = 0; i < len; ++i) { + sendBell202(buf[i]); + } +} + + +void setup() { + OUT_DDR = 0xff; + Serial.begin(115200); +} + +uint8_t bytes[] = { + 0xff, 0x55, 0xff, 0x00, 0xff, 0x00 +}; + +void loop() { + sendBell202buf(bytes, 6); +} diff --git a/test/README b/test/README new file mode 100644 index 0000000..9b1e87b --- /dev/null +++ b/test/README @@ -0,0 +1,11 @@ + +This directory is intended for PlatformIO Test Runner and project tests. + +Unit Testing is a software testing method by which individual units of +source code, sets of one or more MCU program modules together with associated +control data, usage procedures, and operating procedures, are tested to +determine whether they are fit for use. Unit testing finds problems early +in the development cycle. + +More information about PlatformIO Unit Testing: +- https://docs.platformio.org/en/latest/advanced/unit-testing/index.html