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Hi,MasterMCU: STM32H743IILVGL: V9.1Problem Description:I have an external SDRAM with a size of 32MB.The program is configured as follows:void sys_cache_enable(void) { SCB_EnableICache(); SCB_EnableDCache(); SCB->CACR |= 1 << 2; } void m...
Hello everyone,I’m facing an issue with an STM32L4-based design where the USB FS Device stack (CDC) sporadically fails to start correctly. Maybe someone has seen similar behavior or can point me to potential root causes. System overview / setupMCU: S...
Hello everyone! Recently, I have been developing a firmware product based on STM32H750, using FreeRTOS and LwIP. Because the application scenarios for this product frequently involve large volumes of broadcase messages, while the product's own commu...
Hi ST expertI'm ready to use STM32G473CBUx now. According to the datasheet, the STM32G473CBUx does not have an analog ground VSSA, only a ground VSS. I have questions:1. The analog input of the internal ADC/DAC is referenced to the chip's VSS, or has...
Hi,Trying to set Option Bytes over USB with DFU protocol to STM32G0C1VET6's embedded System Bootloader results in a LIBUSB Pipe Error.Steps to reproduce with details captured further below:Fully erase user flash using STM32CubeProgrammer connected to...
I'm planning to connect 40 LED with a current of 20mA (total 800mA) to 40-gpio pins of STM32G4 device. The pins will be configured as Open-drain so the 20mA LED current of each pin will flow through an external resistor and the internal low-side NMOS...
Hi,On checking, I noticed a mismatch between the expected sampling frequency (44.1 kHz) and the actual frequency (46.875 kHz). Could this be the cause of the noise? Any suggestions on what might be going wrong?For reference, I’m using SAI1_A with cir...
I am implementing a system with two STM32H753 microcontrollers. MCU1 reads ADC data and sends it over UART to MCU2 using UART DMA on ADC conversion. MCU2 reads data from UART via DMA and is supposed to do some filtering (among other things) to the re...
Hello,We are working with an STM32F03 and an ECS-320-8-37B-CKY-TR 32 MHz crystal (CL = 8 pF).Our earlier design used an 8 MHz crystal (CL = 8 pF) with 4 pF load capacitors and a 5.1 kΩ series resistor. After switching to the 32 MHz crystal, the HSE n...
Hello, We're working on a custom board for the STM32H750IBX. Our boards arrived. The first time, the chip was installed poorly and shorted out. We assembled a new board at the SMT factory with the new chip, but we still can't connect to the chip to p...
