Raspberry Pi Soft-UART Linux Device Driver

After the test, user-space RX and TX tools, now the Linux device driver!

Raspberry Pi Soft-UART RX

A Raspberry Pi Software-based UART tool (RX only) through any GPIO pin. Details and limitations can be seen HERE.

Raspberry Pi Soft-UART TX

A Raspberry Pi Software-based UART tool (TX only) through any GPIO pin. Details and limitations can be seen HERE.

STM ARM Cortex-M3 CMSIS UART

Learn how to use the STM ARM Cortex-M3 UART peripheral with CMSIS layer, including IRQ and data echo, using the Keil uVision IDE.

STM ARM Cortex-M3 Bootloader

Each ARM microcontroller is built with the ARM CPU architecture, plus peripherals, that varies from each manufacturer, and this is the difference between a microcontroller from NXP to STM to Atmel and so on. The STM ARM Cortex-M3 series has a built-in bootloader, that enables write the flash through the UART connection. Here you can see how to do this.

HLK-RM04 Wifi Module Setup

HLK-RM04 is one of those cheap Wifi <-> UART modules which started to appear in the market. This kind of module basically abstracts all the TCP/IP and Wifi stuff, enabling use it as an easy web socket to/from serial port solution. Here you can see how to use it.

Software Based UART Speed Test

UART is one of the most common and useful ways to communicate with the external world. But, there are a limited number of hardware UARTs available, then what to do if you need more? without add any other hardware? If you have some GPIO pin available, Software-based UART is the answer!