STM32World

STM32World is a series of development boards designed for rapid development and prototyping.

The idea is to have MCU boards available with multiple MCU's (possibly including non ST ones such as the ones from GigaDevice).

The boards will be stackable but rather than trying to cram every single imaginable peripheral device into every board, these will be deliberately kept simple. A CAN transceiver board will include a CAN transceiver and nothing else.

As much as possible, peripheral board will be designed in such a way that they will not conflict with each other, even though this might not be possible to achieve 100 %.

All files for hardware and software is available at STM32World Github Repository

Why?

There are a gazillion STM32 development boards available on the market. A very reasonable question would be: "Why create another one?"

In general development boards fall into two different categories:

1. Simple boards such as the common Blue Pill and Black Pill boards
2. Complex boards such as most of ST's Nucleo and Discovery boards

The problem with the simple boards is that you have a very limited selection of MCUs and you end up with a ratnest of jumper wires.

The problem with the complex boards is that they are too opinionated. I have a STM32F405 based discovery board and that one includes a complex audio part, which I have never needed nor used.

Form Factor

STM32World boards are meant to be stackable.

All boards are 3" x 2". In many cases this is much bigger than needed but PCB's are cheap and having the boards at that size makes layout much easier.

Planned Boards

	Name	Type	Description	Status
	MCUSTM32F405	MCU	MCU Board using the STM32F405 MCU	Ready for prototype
	PRGSTL	Programmer	Board designed like a ST-Link/V2.1 device	Ready for prototype
	MEMW25Q128	Storage	W25Q128 SPI Serial Flash	Ready for prototype

Board Ideas

	Name	Type	Description	Status
	MCUSTM32F411	MCU	MCU Board using the STM32F411 MCU	Under development
	MCUSTM32F103	MCU	MCU Board using the STM32F103 MCU	Under development
	MCUGD32F405	MCU	MCU Board using the GD32F405 MCU	Under development
	IOAW9523	I/O	I²C AW9523 based GPIO Expander and LED driver	Under development
	HID01	Display/Keyboard	Display and touch keyboard	Under development
	DWS2812	Display	WS2812B RGB LED Array	Under development

Pin Use

The STM32 processors are not 100 % flexible in mapping I/O pins, so certain peripherals can only be mapped to certain pins. Because of that, some of our board will conflict with each other.

Desc Name No No Name Desc Battery Supply VB 1 2 GND Ground Boot0 BO0 3 4 NRST Reset ADC IN10 PC0 5 6 PC1 PC2 7 8 PC3 PA0 9 10 PA1 USART2_TX PA2 11 12 PA3 USART2_RX PA4 13 14 PA5 PA6 15 16 PA7 PC4 17 18 PC5 PB0 19 20 PB1 PB2 21 22 U0 PB10 23 24 PB11 PB12 25 26 PB13 PB14 27 28 PB15 PC6 29 30 PC7 PC8 31 32 PC9 U1 33 34 U2 U3 35 36 U4 Regulated 3.3V 3.3V 37 38 GND Ground 5V 39 40 GND Ground

Desc Name No No Name Desc Ground GND 80 79 VA Analogue Supply U6 78 77 U5 PC15 76 75 U7 PC13 74 73 PC14 U10 72 71 U9 PB9 70 69 PB8 USART1_RX_Alt PB7 68 67 PB6 USART1_TX_Alt PB5 66 65 PB4 PB3 64 63 PD2 U8 62 61 PC12 PC11 60 59 PC10 U12 58 57 U11 PA15 56 55 PA14 SWCLK SWDIO PA13 54 53 PA12 PA11 52 51 PA10 USART1_RX USART1_TX PA9 50 49 PA8 U14 48 47 U13 U16 46 45 U15 Ground GND 44 43 3.3V Regulated 3.3V Ground GND 42 41 5V