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mongoose/examples/STM32F4_CC3100
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Marko Mikulicic 618bef0eb2 Fix stm32f4_cc311 example and add it to CI 
The build has been broken because MQTT has been disabled during some refactoring
but never caught because this example was never built on CI.

PUBLISHED_FROM=b67051ff948f1ac89448fc707f41cdf5d48cdaaf
2016-10-14 08:37:28 +00:00
..
main.c Add STM32F4/CC3100 example & Co 2016-09-05 15:06:21 +00:00
Makefile Add STM32F4/CC3100 example & Co 2016-09-05 15:06:21 +00:00
Makefile.build Fix stm32f4_cc311 example and add it to CI 2016-10-14 08:37:28 +00:00
README.md Add STM32F4/CC3100 example & Co 2016-09-05 15:06:21 +00:00
sdk.version Add STM32F4/CC3100 example & Co 2016-09-05 15:06:21 +00:00
startup_stm32f429xx.s Add STM32F4/CC3100 example & Co 2016-09-05 15:06:21 +00:00
startup_utils.c Add STM32F4/CC3100 example & Co 2016-09-05 15:06:21 +00:00
stm32f4xx_hal_msp.h Add STM32F4/CC3100 example & Co 2016-09-05 15:06:21 +00:00
stm32f429xx.ld Add STM32F4/CC3100 example & Co 2016-09-05 15:06:21 +00:00
user_params.h Add STM32F4/CC3100 example & Co 2016-09-05 15:06:21 +00:00

README.md

STM32F4 example project

This example shows how to use mongoose on STM32 boards. To run it you will need:

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.