| ... | ... | @@ -8,13 +8,16 @@ If you want to visualize the data you read from the sensor on your PC, you can u |
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Everytime you call *TRACE()* in your code, the output data is redirected to the default serial port of the microcontroller. The default serial port for the STM32F407VG microcontroller is the `USART3` (default value set by Miosix), which corresponds to the GPIOs `PB10` (TX) and `PB11` (RX). The baud rate is by default set to `19200`.
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In order to read the *TRACE()* output you can use a serial to USB adapter and the connections you need are:
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- PB10 (TX) -> adapter RX
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- PB11 (RX) -> adapter TX
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- PB13 -> adapter CTS
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- PB14 -> adapter RST
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- GND -> adapter GND
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Make sure you connect at least RX, TX and GND pins.
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| STM32F407VG | Adapter |
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|--------------|---------|
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| PB10 (TX) | RX |
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| PB11 (RX) | TX |
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| PB13 | CTS |
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| PB14 | RST |
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| GND | GND |
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Make sure you connect at least `RX`, `TX` and `GND` pins.
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If you want to only receive data you can connect only the RX pin of the adapter (or TX if you only want to send data).
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Consider that you should set your serial adapter to work with 3.3 volts, since the microcontroller GPIOs work with this voltage level.
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| ... | ... | @@ -24,11 +27,12 @@ You also need a program that is able to read those data from the USB port of you |
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#### Note
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Consider that if you are using a different board, it may be possible that its USB connector is also connected to a microcontroller's serial port (i.e. you don't need to connect an external adapter). Just check which serial port is connected to the USB connector (e.g. `USARTX`).
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## Writing an entrypoint
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## Create your entrypoint
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Here we will write an entrypoint that uses the *TRACE()* function in order to send data to the PC.
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Here we will write an entrypoint that uses the *TRACE()* function in order to send data to the PC.
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In `src/entrypoints` add a file called `hello-skyward`.cpp`.
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Inside it you can put your code:
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#### hello-skyward.cpp
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```cpp
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#include <Common.h>
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| ... | ... | @@ -47,7 +51,7 @@ int main() |
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return 0;
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}
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```
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#### sbs.conf
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## Compile with SBS
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You should also add the entrypoint configuration to `sbs.conf`.
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First of all we need an `srcfiles` section in which we add the `Debug.cpp` file, on which the *TRACE()* function depends:
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| ... | ... | @@ -64,7 +68,7 @@ Moreover the *trace_include* include is needed in order to compile also `Debug.c |
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```config
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[hello-skyward]
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Type: test
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Type: board
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BoardId: stm32f407vg_stm32f4discovery
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BinName: hello-skyward
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Include: %trace-include
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| ... | ... | @@ -73,4 +77,4 @@ Main: hello-skyward |
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```
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## Run it!
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Same as before: build the entrypoint with `python sbs -b test-led-driver` and [flash the binary on the board](Flashing-on-a-Target-Board). |
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\ No newline at end of file |
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Same as before: build the entrypoint with `python sbs -b hello-skyward` and [flash the binary on the board](Flashing-on-a-Target-Board). |
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\ No newline at end of file |
