STM32 MCUs Products

what happen if I call more than once HAL_UART_Receive_DMA API before Rxcpltcallback of first call?

I am using STM32F407VG. I am transmitting data from PC to STM32 using uart. I wrote the code to receive 100 bytes. Firstly I call the HAL_UART_Receive_DMA more than once and then I sent the data from PC to STM32.I observed it receives only 100 byte...

Timer for generating 1us tick

I'm using STM32F108RG on 48MHz clock configuration.I need to generate a 1 micrososeconds timer tick on it, for driving an output pin interfaced with a 3rd party device. Using PWM is not an option available.I tried configuring TIM3 with following para...

stm32 IAP Binary problem

I am getting this error while debugging "Break at address "0x20004000" with no debug information available, or outside of program code". I am attaching main and linker file. How to solve this? Thanks in advance..

STM32L0 ADC voltage calculations

I have been trying to calculate voltage of the battery connected to ADC_IN7 of STM32L010K8. I have connected a battery to it via voltage divider. When I read the ADC I get raw values of 1948 for applied voltage of 3.7V. After going through the datash...

How to configure usart software fow control (XON/XOFF) in stm32f030 microcontroller?

SPI DMA Stream Seems to Eventually Freeze

Hi,I'm using CubeMX generated HAL drivers to use SPI in DMA mode. In my particular situation, we are sending a small amount of data (3 bytes) very often over the SPI interface. The data transmission works fine most of the time, but sometimes (as litt...

Hello everyone, I am using stm32f207zg with usb ttl converter with ftdi chip. I want use the usart1 for communication with PA9 e PA10 pins as TX and RX of usart1. I use as virtual terminal, termite, and when i play the program, appear weird characters.

#define RCC_CFGR *((long*)0x40023808)#define RCC_CR *((long*)0x40023800)#define RCC_AHB1ENR *((long*)0x40023830)#define GPIOC_ODR *((long*)0x40020814)#define GPIOA_MODER *((long*)0x40020000)#define GPIOA_OTYPER *((long*)0x40020004)#define GPIOA_AFRL ...

Can I have APB1 and APB2 Timer clock frequencies more than the max that are mentioned in the datasheet?

 I am using STM32F427XX, for which APB1 timer frequency is 84Mhz and APB2 is 168Mhz. Actually per datasheet, max clock frequencies are 45 and 90. My application is running correctly with the above frequencies. Will there be any problem with the MCU u...

Why can not change DBGMCU->CR in STM32F103

I'm use STM32F103C8T6. I use DBGMCU->CR = DBGMCU_CR_TRACE_IOEN to change the value of DBGMCU->CR, but the operation is failed after POR, the register is alway read 0.I suspect that the cause of this problem is the the debug component is not be powere...