STM32 MCUs Products

I'm monitorating heart rate by the MAX30100(https://img.filipeflop.com/files/download/Datasheet_MAX30100.pdf) using the MCU STM32F4. I'm trying read the IR and RED data from the FIFO, but all returns are **ZERO**.

I'm monitorating heart rate by the MAX30100(https://img.filipeflop.com/files/download/Datasheet_MAX30100.pdf) using the MCU STM32F4. I'm trying read the IR and RED data from the FIFO, but all returns are **ZERO**. The method `MAX30100_Get_Num_Samples...

I am developing a product that uses an STM32F103. I spent the last two days debugging the USART1 port due to multiple issues with the controlling SBC and the ARM GNU stdio lib.

I got everything working but it turns out that there is an undocumented feature with the RTS line. Even after I bypassed the HW bug with the CAN peripheral (that was documented in your errata sheet), it still would not raise the RTS line when its RD...

STM32H743 cannot use HAL_SPI_Transmit_DMA with Nor Flash

I'm working on STM32H743 applied SPI DMA with MT25 QL128ABA1(NOR Flash) and initial mode to master mode.My problem is I cannot receive (HAL_SPI_Receive_DMA) return data when I use HAL_SPI_Transmit_DMA by run code through but I can receive return data...

Where do I read OCxREF?

I need to set up a PWM without an output pin but be able to read the state of the "virtual" signal. In the reference manual this state is referred to as OCxREF (OC1REF, OC2REF etc.). However, I'm clearly going senile as I can't find this in any of th...

STM32L151RCT6 PC3 5V Tolerant GPIO

HiIn the STM32L151RCT6 Datasheet (August 2017, DocID022799 Rev 13) it is specified that the PC0 to PC10 GPIO pins are 5V tolerant except the PC3, that should have a standard 3V3 IO structure. We have measured these GPIOs and have found that the PC3 h...

Is there a STM32F100 part that can lock to a clock of 800Khz?

How to use the "errno" in STM32F103CBT6?

Hello!I'm using some of the string conversion functions, who's declarations are present in the "stdint.h" file. at present I'm using "strtol" and "strtod". According to the library "the value of the macro ERANGE is stored in errno, If the correct val...

For STM32L1 microcontrollers, can the TS_CAL1, TS_CAL2 temperature calibration parameters be reprogrammed by either application software or a debugger tool?

ULPI clock noise + I/O compensation cell

We are seeing around 400mV of ULPI clock noise (60MHz) on the remaining DAC output with an STM32F427. The data sheet suggests to use the I/O compensation cell when using 100MHz outputs (like all the ULPI interface signals), but information about how ...