mirror of
https://github.com/cesanta/mongoose.git
synced 2024-12-03 17:28:59 +08:00
86 lines
2.6 KiB
Markdown
86 lines
2.6 KiB
Markdown
|
# STM32F4 example project
|
||
|
|
|
||
|
|
This example shows how to use mongoose on STM32 boards.
|
||
|
|
To run it you will need:
|
||
|
|
- [STM32F429-Discovery](http://www.st.com/content/st_com/en/products/evaluation-tools/product-evaluation-tools/mcu-eval-tools/stm32-mcu-eval-tools/stm32-mcu-discovery-kits/32f429idiscovery.html) dev board
|
||
|
|
- [CC3100](http://www.ti.com/product/CC3100) WiFi network processor
|
||
|
|
|
||
|
|
## Wiring scheme
|
||
|
|
|
||
|
|
By default, example uses SPI4 for communication with CC3100 and UART1 for
|
||
|
|
the debug output. All parameters are described in file `stm32f4xx_hal_msp.h`,
|
||
|
|
they can be changed to use another SPI and/or UART
|
||
|
|
|
||
|
|
To use default scheme connect (CC3100 -> STM32-DISCO) connect:
|
||
|
|
```
|
||
|
|
DO -> PE5
|
||
|
|
DIN -> PE6
|
||
|
|
CLK -> PE2
|
||
|
|
CS -> PB12
|
||
|
|
IRQ -> PA0
|
||
|
|
HIB -> PB0
|
||
|
|
```
|
||
|
|
|
||
|
|
## Building firmware
|
||
|
|
|
||
|
|
Change `user_params.h`, put correct WiFi SSID and password there,
|
||
|
|
also change `MQTT_BROKER_ADDRESS` to the real broker address.
|
||
|
|
|
||
|
|
`make` in `mongoose/STM32F4_CC3100` will download required docker image and make
|
||
|
|
firmware. Result will be in `STM32F4_CC3100/out` folder.
|
||
|
|
|
||
|
|
## Uploading firmare
|
||
|
|
|
||
|
|
Uploading firmware method depends on how you connected STM32 board to your
|
||
|
|
computer. If it is connected via USB ST-LINK connected it is appears as
|
||
|
|
a flash drive and in order to upload firmware just copy `out/example.bin`
|
||
|
|
to that drive.
|
||
|
|
|
||
|
|
## Running
|
||
|
|
|
||
|
|
Compile two additional samples: `mqtt_broker` and `mqtt_client` and run them
|
||
|
|
in different terminals.
|
||
|
|
Press `reset` (or repower) STM board.
|
||
|
|
The board will connect to broker and will start to publish its uptime in
|
||
|
|
`/stuff` channel. `mqtt_client` is subscribed on this channel as well, so
|
||
|
|
it should start to print
|
||
|
|
|
||
|
|
```
|
||
|
|
Got incoming message /stuff: Current tick: 99000
|
||
|
|
Forwarding to /test
|
||
|
|
Got incoming message /stuff: Current tick: 100120
|
||
|
|
Forwarding to /test
|
||
|
|
Got incoming message /stuff: Current tick: 101250
|
||
|
|
Forwarding to /test
|
||
|
|
...
|
||
|
|
|
||
|
|
```
|
||
|
|
|
||
|
|
If you connect UART to serial port monitor (pin PA9 or ST-LINK device, like /dev/ttyACM0)
|
||
|
|
you should see device output:
|
||
|
|
```
|
||
|
|
**** Hello ****
|
||
|
|
Initializing CC3100 on SPI4
|
||
|
|
Starting WiFi connect
|
||
|
|
Done, waiting for events
|
||
|
|
Connected to WiFi
|
||
|
|
Got IP
|
||
|
|
Connected to 192.168.1.108:1883
|
||
|
|
Connected to broker
|
||
|
|
Subscribing to /test
|
||
|
|
Subscription acknowledged
|
||
|
|
Publishing message with tick=1
|
||
|
|
Got incoming message /test: Current tick: 4487
|
||
|
|
Publishing message with tick=2
|
||
|
|
Got incoming message /test: Current tick: 5597
|
||
|
|
Publishing message with tick=3
|
||
|
|
Got incoming message /test: Current tick: 6717
|
||
|
|
...
|
||
|
|
|
||
|
|
```
|
||
|
|
|
||
|
|
This output looks like this because the device sends messages `Current tick: ....`
|
||
|
|
into `/stuff` channel, `mqtt_client` receives all messages in this channel
|
||
|
|
and sends them to `/test` channel. But the device is subscribed to this channel
|
||
|
|
so, it receives it back.
|