About subu.rama

subu.rama · 2019-04-13

I am using the latest System Workbench on Nucleo to set up for experiments.My code is as follows:#define SYS_CLOCK_FREQ_50_MHZ 50 int main(void) { HAL_Init(); SystemClock_Config_HSE(SYS_CLOCK_FREQ_50_MHZ); GPIO_Init(); UART2_Init(); ...

subu.rama · 2019-04-03

I would like to experiment with feeding external clocks to the MCU on a Nucleo-F446RE (MB 1136 C) board.I am not a hardware engineer, so pardon my ignorance with this. I am still learning!From the schematics and physical board inspection of the Nucle...

subu.rama · 2019-03-17

I am trying to verify the various commands described in AN3155, ST's app note for USART protocol used in the STM32 bootloader.Per Section 1, when the bootloader receives 0x7F data frame, the code initializes the serial interface and then is ready to ...

subu.rama · 2019-04-13

Found out the this project was using an older version of the firmware package. CubeMX was initially used to generate a skeleton/template and code was modified to be as shown above.Once the project was redone using the latest CubeMX firmware, it all w...

subu.rama · 2019-04-03

Sounds good. Thank you, Clive for the hints. I will learn about the schmartboard and dupont board usage etc.Meanwhile, I will go ahead and solder it; will try it with a cheapo oscillator first to get practice :-)Subu

subu.rama · 2019-04-03

Thank you, Clive. If I am understanding this correctly, you are referring to the MCO that's connected over SB50 to OSC_IN of the MCU. Yes, I understand that if I connect X3, I need to disable the MCO input by clearing SB50.Do you know of any availa...

subu.rama · 2019-04-03

I don't know why the schematic excerpts didn't appear in my earlier post.Here they are.Subu

subu.rama · 2019-03-17

Yes, after sending the "one chance" 0x7F a few times after resetting the board each time, I was finally able to establish a connection to the bootloader and could verify the commands and responses from AN3155.The key sentence in your answer is:"You g...

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Infinite loop in HAL_RCC_GetSysClockFreq() in HAL_RCC_ClockConfig() onNucleo STM32F446RE

External clock with Nucleo F446RE ..

Host application for interacting with STM32 Natvie SystemROM bootloader

Re: Infinite loop in HAL_RCC_GetSysClockFreq() in HAL_RCC_ClockConfig() onNucleo STM32F446RE

Re: External clock with Nucleo F446RE ..

Re: External clock with Nucleo F446RE ..

Re: External clock with Nucleo F446RE ..

Re: Host application for interacting with STM32 Natvie SystemROM bootloader