Forum Posts
STM32H7 XiP poor performance with QSPI NOR Flash
I've been developing a solution around the STM32H750 that requires external flash to run relatively large firmware images, up to around 2Mb.The NOR Flash part used is the Cypress s25fl064l, in QSPI configuration. It has quad read rates of up to 54Mbp...
RTC alarmA and alarmB wake up
Hi,I am using nucleo-476Rg board.I have configured RTC AlarmA ad AlarmB for different timings, then I go in standby mode.The board wakes up from standby on any of the alarm occurrence.Can I know whether it is due to alarm A or alarm B. when it wakes ...
Are there any examples of the Bluetooth Advertising or Broadcasting mode of the B-L475E-IOT01A?
Hello,I am currently working with the B-L475E-IOT01A board. Through bluetooth I would like to use the mode in which I send data periodically and an external device, when it enters the transmission range, can read this data.So I was wondering which of...
Bad signal when using DAC'S full range and buffer
Hi,I've been trying to synthesize different waveforms with my F446 DAC. Three things have come to my attention here, which I can't explain. First, when I am using the full range of the DAC with values from 0 to 4095 the signal gets distorted like thi...
Strange temperature dependent "software" bug with QSPI transfer
Hello,I have a strange problem... We have a bunch of equal boards (STM32H743XIH6) from manufacturer and some have temperature dependent problems (3 of 20). The problem seems like a software problem, but many software changes couldn't reproduce this.I...
STM32H743 UART RX DOES NOT RECIEVE CORRECTLY
I have two stm32 on my board. I send serial data from stm32f407 to both max232 and stm32h743. The output data from the max232 is correct. but when I debug the stm32h743 input serial data, its data is incorrect. what is the problem?
PKA - ecdsa curve support
The sample code uses p256v1 (which seems to actually be p256r1). This curve works well.I Got PKA to sign correctly using p256k1 with some minor curve updates.I am having trouble setting up p224r1. Has anyone got curves other that p256 to work?Tn...
STM32L476RG not using flashed design
I just purchased the NUCLEO-STM32L47RG, and have tried using the following code below to press a switch to turn an LED on. However the code doesn't seem to actually be loading onto my microcontroller, I'm using Keil uVision 5 IDE if that makes a diff...
RTC runs slower 2 second / 5 minutes after disconnect power
We are using LSE 32,768. RTC looks like runs correctly if power is on. But if we disconnected power, RTC still hold data but run slower, about 2 seconds / 5 minutes.We changed new battery, even used power supply to feed vbat pin, same issue.I tried ...
