STM32 RS-485 Modbus RTU on the Blue Pill with HAL
Build a Modbus RTU client on the STM32 Blue Pill with RS-485 and HAL. Wire the transceiver, time DE and TC, and verify holding-register replies.
STM32 I²S Microphone with DMA on the Black Pill
Capture an INMP441 on the STM32F411 Black Pill with I2S and circular DMA. Set 16 kHz clocks, size the buffer and decode signed 24-bit samples.
STM32 Hardware CRC32 on the Blue Pill with HAL
Calculate STM32F103 hardware CRC32 with HAL. Match MPEG-2 and zlib profiles, handle byte order and tails, and verify a binary frame.
STM32 TIM1 Complementary PWM with Dead Time on the Blue Pill
Set up TIM1 complementary PWM on an STM32 Blue Pill. Calculate dead time, measure the non-overlap and test the hardware break and manual re-arm.
STM32 Quadrature Encoder with TIM3 on the Blue Pill
Read a quadrature encoder with STM32 Blue Pill TIM3. Wire A and B, set the input filter, handle 16-bit wraparound and calculate signed RPM.
STM32 FreeRTOS Tutorial with Static Tasks and Queues on the Blue Pill
Run FreeRTOS on an STM32 Blue Pill with static tasks and queues. Set up SysTick and TIM2, test queue overload and check stack use.
STM32 microSD Data Logger with SPI and FatFs on the Blue Pill
Build an STM32 Blue Pill microSD data logger with SPI and FatFs. Wire an SDHC card, append CSV rows and verify the data after syncing.
STM32 Flash Settings Tutorial for the Blue Pill
Store settings in STM32F103 Flash with STM32Cube HAL. Reserve two pages, validate records at boot and recover from interrupted saves.
STM32 Timer Tutorial: Prescalers, Interrupts and Input Capture on the Blue Pill (2026)
Quick answer: On an STM32F103C8 Blue Pill, configure a general-purpose timer such as TIM2 with the correct input clock, prescaler (PSC) and auto-reload register (ARR). For a typical 72 MHz timer clock, PSC = 7199 and ARR = 9999 produce…
STM32 Blue Pill CAN Bus Tutorial: bxCAN Loopback, Filters and a Two-Node Lab
Build a 500 kbit/s CAN link with the STM32F103 Blue Pill. Test bxCAN silent loopback, set a standard ID filter, and connect two terminated SN65HVD230 nodes.