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Improve DFM-17 docs

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Mikael Nousiainen 2023-10-07 01:02:06 +03:00
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README.md
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@ -365,7 +365,7 @@ Follow the instructions below for the radiosonde model you have.
### Vaisala RS41 programming connector
The pinout of the RS41 connector (by DF8OE and VK5QI) is the following:
The pinout of the RS41 programming connector (by DF8OE and VK5QI) is the following:
```
______________________| |______________________
@ -407,7 +407,10 @@ ______________________| |______________________
### Graw DFM-17 programming connector
The pinout of the DFM-17 connector is the following:
The DFM-17 programming connector is an unpopulated group of pads on the circuit board
between the sensor boom connector and the main STM32 microcontroller.
The pinout of the DFM-17 programming connector is the following:
```
_____
@ -435,7 +438,7 @@ _____
* This pin powers the device via 3.3V voltage from an ST-LINK programmer dongle
* 2 - SWDIO / TMS
* 3 - GND
* 4 - SWDCLK / TCK
* 4 - SWCLK / TCK
* 5 - GND
* 6 - SWO EXT TRACECTL / TDO
* 7 - KEY
@ -445,15 +448,17 @@ _____
#### Connect the DFM-17 radiosonde to the programmer
1. If your ST-LINK v2 programmer is capable of providing a voltage of 3.3V (as some third-party clones are),
remove the batteries from the sonde. Otherwise, leave the batteries in and power on the sonde.
1. Since the DFM-17 programming connector is just an unpopulated group of pads on the circuit board,
**you will need to either solder wires directly to the pads or alternatively solder a 0.05" (1.27mm) 5-by-2 pin header to the pads**.
There are suitable ribbon cables with 5x2 0.05" connectors available for this type of pin header.
2. Connect an ST-LINK v2 programmer dongle to the sonde via the following pins:
* SWDIO -> (SWDIO)
* SWCLK -> (SWCLK)
* RST -> (RST)
* GND -> (GND)
* 3.3V -> (VTRef) (only required when using the programmer to power the sonde)
* Note that you will need to either solder wires directly to the connector or solder a 0.05" (1.27mm) 5-by-2 pin header to the connector.
* SWDIO -> Pin 2 (SWDIO)
* SWCLK -> Pin 4 (SWCLK)
* RST -> Pin 10 (RST)
* GND -> Pin 5 (GND)
* 3.3V -> Pin 1 (VTRef) (only required when using the programmer to power the sonde)
3. If your ST-LINK v2 programmer is capable of providing a voltage of 3.3V (as some third-party clones are),
remove the batteries from the sonde. Otherwise, leave the batteries in and power on the sonde.
## Flashing the radiosonde with the firmware (both RS41 and DFM-17)