kopia lustrzana https://github.com/sp5wwp/M17_ANL_v2
96c8925558
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| RFElements | ||
| LICENSE | ||
| M17_ANL_v2.csv | ||
| M17_ANL_v2.kicad_pcb | ||
| M17_ANL_v2.pdf | ||
| M17_ANL_v2.pro | ||
| M17_ANL_v2.sch | ||
| PHOTO1.jpg | ||
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| README.md | ||
README.md
M17_ANL_v2
New M17 hotspot/analyser, this time with ADF7021
Schematic
Diagram was not tested yet. However, schematic and PCB layout is still work in progress. PCB design was put into production in 1 February 2020. Testing will take aprox. 2 months.
Technical details
M17_ANL_v2 is a radio modem designed especially to support interaction with existing M17 capable radio terminals & repeaters. It also means packet acquisition, for debugging cases or sniffing, just for fun idk. However M17_ANL_v2 can be used to receive and transmit raw digital data - it's by design protocol agnostic.
Parameters
- Operating freqency range is 420MHz to 450MHz (M17 operates within amateur frequency band 430-440MHz) - after a few changes of RF elements values also another frequency bands
- Modulation schemes selectable - 2FSK, 3FSK, 4FSK, MSK and FM (for M17 - 4FSK)
- Output power level is set from -16dbm up to 10dbm (in 0.3125 dB steps)
- Data rate is set from 0.05 up to 25 kbps (for M17 - 9600 bps)
- IF filter bandwidth selectable - 12.5 kHz, 18.75 kHz, or 25 kHz
- Configuration, transmit and receive by AT commands - over USB-CDC
- All registers of ADF7021 also configurable by manual mode
- Additional 4 GPIOs - first pair can be used as I2C interface, second can be UART
- Four different colour LEDs - PWR, SYS, RX and TX - indicate the state of the device
- Programmable by SWD interface
MORE TODO
Most important ICs used in project
- STM32F303CBT6 - MCU which controls data flow(PC <-> RF TRX), and radio parameters.
- ADF7021 - radio transceiver.
Testpoints description
| TestPoint NO | Description | Pin of STM32 | Pin of ADF7021 |
|---|---|---|---|
| TP1 | SPI_SCK | PB13 | 28 |
| TP2 | SPI_MISO | PB14 | 27 |
| TP3 | SPI_MOSI | PB15 | 26 |
| TP4 | SPI_ENABLE | PA8 | 25 |
| TP5 | RF_ENABLE | PA9 | 24 |
| TP6 | DClk | PA6 | 35 |
| TP7 | Data | PA7 | 34 |
| TP8 | SWD | PB0 | 33 |
| TP9 | RF_CLK | PA5 | 36 |
| TP10 | AD | PA2 | from Filter 1 |
| TP11 | MO | PA3 | 37 |
| TP12 | DA | PA4 | to Filter 2 |
| TP13 | FMDM | to Filter 1 | 33 |
| TP14 | FMM | from Filter 2 | 21 |
Filter 1 - used by ADC, Filter 2 - used by DAC
MORE TODO
Headers description
| Header | Pin | Pin of STM32 | Use case |
|---|---|---|---|
| J4 | 1 | GND | X |
| J4 | 2 | PB9 | GPIO, I2C_SDA |
| J4 | 3 | PB8 | GPIO, I2C_SCK |
| J4 | 4 | PB7 | GPIO, USART_RX |
| J4 | 5 | PB6 | GPIO, USART_TX |
| J4 | 6 | VCC | X |
| ------------- | ------------- | ------------- | ------------- |
| J3 | 1 | NRST | RST |
| J3 | 2 | GND | X |
| J3 | 3 | PA13 | SWDIO |
| J3 | 4 | PA14 | SWCLK |
| J3 | 5 | VCC | X |
Control software
TODO