About oleksandr.karbivsky

oleksandr.karbivsky · 2020-07-09

Strange behavior of STM32H743. It continuously reset every few seconds.I check reset reason with this part of code after system startup:if (__HAL_RCC_GET_FLAG(RCC_FLAG_IWDG1RST)) { _PRINTF("RESET_CAUSE_INDEPENDENT_WATCHDOG_RESET\n"); } else...

oleksandr.karbivsky · 2019-02-25

Hello. I have custom board with STM32H743 and USB3320 in Full Speed Mode. Dont have problem with initialization of MSC (Window read descriptor, configuration and other). But when read blocks from SD card some trouble occurs. With USBPcam and Wireshar...

oleksandr.karbivsky · 2019-02-11

Hello. We have custom board with STM32H743XI mcu and USB3320. Power supply for microcontroller is 1.8V. When initialized USB1_HS in Full Speed mode, PC recognized board like VCP and data transaction is ok. But when initialized in High Speed mode, PC ...

oleksandr.karbivsky · 2018-11-16

Maximum CPU freq. with 3.3V power supply for STM32H7 series is 400 MHz. Is it the same for 1.8V?

oleksandr.karbivsky · 2018-11-06

Hi. I got Cryptographic Library from ST. I added M4_CryptoFW_2_0_6.a to my project and tried calculate SHA256. But got hardfault when call SHA256_Finish function. Hardfault message is " A precise data access error has occurred (CFSR.PRECISERR, BFAR) ...

oleksandr.karbivsky · 2020-07-16

Do you use Keil uVision?

oleksandr.karbivsky · 2020-07-13

When you call this HAL_UART_Receive_IT(&huart1, myRxData, 4);HAL library receives 4 bytes to myRxData buffer and then rise HAL_UART_RxCpltCallback. After that, data acquisition stops.If you want continuously receive data, try this:uint8_t myRxData[10...

oleksandr.karbivsky · 2020-07-12

Hi. Your data buffer is 1 byte? uint8_t myRxData[1];If you want use IT or DMA methods, properly interrupts must be enabled.

oleksandr.karbivsky · 2020-07-09

Thank you! I check this. At good behavior board, register FLASH_OPTSR_CUR: IWDG1_SW bit is 1, at continuously reset board is 0. (0: IWDG1 watchdog is controlled by hardware 1: IWDG1 watchdog is controlled by software)

oleksandr.karbivsky · 2020-06-23

I2C pins configuration is located in function HAL_I2C_MspInit.

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STM32H743 IWDG continuously reset MCU

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