Implement AFSK with pre-generated sinus table
This commit is contained in:
commit
dafe1910db
GPG key ID:
0AA29A52FB33CFB5
8 changed files with 277 additions and 0 deletions
1
.gitignore
vendored
Normal file
1
.gitignore
vendored
Normal file
|
|
@ -0,0 +1 @@
|
|||
.pio
|
||||
90
create_sinus_tables.py
Executable file
90
create_sinus_tables.py
Executable file
|
|
@ -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 <avr/pgmspace.h>
|
||||
|
||||
#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()
|
||||
39
include/README
Normal file
39
include/README
Normal file
|
|
@ -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
|
||||
33
include/afsk_sinus.hpp
Normal file
33
include/afsk_sinus.hpp
Normal file
|
|
@ -0,0 +1,33 @@
|
|||
|
||||
#include <avr/pgmspace.h>
|
||||
|
||||
#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;
|
||||
}
|
||||
|
||||
46
lib/README
Normal file
46
lib/README
Normal file
|
|
@ -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 <Foo.h>
|
||||
#include <Bar.h>
|
||||
|
||||
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
|
||||
15
platformio.ini
Normal file
15
platformio.ini
Normal file
|
|
@ -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
|
||||
42
src/main.cpp
Normal file
42
src/main.cpp
Normal file
|
|
@ -0,0 +1,42 @@
|
|||
|
||||
#include <Arduino.h>
|
||||
|
||||
#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);
|
||||
}
|
||||
11
test/README
Normal file
11
test/README
Normal file
|
|
@ -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
|
||||
Loading…
Reference in a new issue