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[ZeROSEro7] Running demo and Fibonacci on the STM32F4xx Dev Kit

I didn’t post last week because I participated in the ATHENS program. I wasn’t in France and I was pretty busy.
Nevertheless, this week, I continued the ZeROSEro7 project and I’m writing about my advancement in the project.

nRF52 dev kit (BLE) to SX1276 dev kit (LoRa)

After finishing the nRF52_DK environment and successfully close the issue “nrf52 dev kit Fibonacci”, I let Enguerrand to continue BLE development on this dev kit.

In addition, I started to manage about the new SX1276 dev kit received last Wednesday. I read the datasheet, schematic, etc. about SX1276 (LoRa). I got back useful documents from the Internet and from Enguerrand’s works to push into a git repository. I obviously spoke with Enguerrand about his works on the previous LoRa dev kit to save all useful information about his works.

I also connected the SX1276 dev kit to the STM32 dev kit (Olimex) with breadboard jumper cables in SPI communication:

Tab 1 : Connexion Olimex – SX1276
Name PIN OLIMEX SX1276
VCC UEXT – 1 J3 – 4
GND UEXT – 2 J2 – 7
NSS J3 – 6 (SX1276) J2 – 3
MOSI UEXT – 8 J2 – 4
MISO UEXT – 7 J2 – 5
SCK UEXT – 9 J2 – 6

Olimex

SX1276

I have to verify the right connexion between olimex and sx1276 with example program to flash in the STM32.

Fibonacci on the STM32F4xx Dev Kit

like with nRF52 dev kit (Nordic), I made an environment for the STM32 dev kit (Olimex).
I added ChibiOS in our git repository and to the usb_dev_kit directory, there is the environment to develop on the STM32 dev kit.
With the Makefile, it’s possible to format the code, compile and debug with gdb.
I updated CI tests to use adapted docker image to compile with the last version of arm-none-eabi-gdb.
All CI tests pass, I merged with dev branch and I closed the issue Fibonacci runs on STM32 dev kit.

Schematics and PCB

I’m improving on the mentor software to draw schematic and I have to start a schematic about one device before next week.

Next week

So for the next week, I will continue about SX1276 (LoRa) with Enguerrand’s help and I will start schematic of one device.

Erwan

IT Student

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