About ELowe

ELowe · 2024-02-04

Hi!I have STM32F469ZGT6 which is having problems with printf function.If I connect debugger probe STLINK-V3SET all my code runs OK.If I disconnect probe my code does not run at all. It does not even start to run.After further investigation, I came to...

ELowe · 2024-01-09

Hi all!I am struggling to couple STM32F469ZGT6 (running at 180 MHz) with SDRAM type IS42S16160J-6TL from ISSI (datasheet here: https://www.issi.com/WW/pdf/42-45S83200J-16160J.pdf ).SDRAM is organized in 4 banks, each having 8192 rows x 512 columns x ...

ELowe · 2023-11-29

Hi!I have STM32F469 and I am analysing how to connect an USB port to it.My MCU will act as a device. PC will be the host.My MCU has power supply equal to 3.3V which is created via LDO which is independently powered (not from VBUS, from host’s USB).MC...

ELowe · 2023-11-12

Hi!I am building PCB around STM32F469ZET6.Now LSE and HSE crystals and accompanying capacitors need to be chosen.AN2867 says capacitors values should be CL1 = CL2 = 2 x (Cl - Cs)Cl – crystal’s load capacitanceCs – stray capacitance of oscillator circ...

ELowe · 2020-08-01

Hi!I have NUCLEO H743-ZI board, and I am trying to create PWM sequence with advanced timer 1, by utilizing DMA feature.Code is mostly generated by cubeMX.I am using PWM mode 2, Center-aligned mode 1.Code works, untill DMA loads into compare register ...

ELowe · 2024-02-04

First correction of something that is false. I said:“Huart6 is connected to STLINK-V3SET, which emulates VCP on PC. So, if probe is disconnected, there is no way of knowing whether serial traffic occurs. I only see LED is not lit.”This is not complet...

ELowe · 2024-01-13

…it turned up to be a hardware issue, few important pins on SDRAM chip were not properly soldered.Test code with pointers now works, and whole 32 Mb address space is functioning correctly.During my tests I stripped project of all not FMC related code...

ELowe · 2024-01-10

OK thanks, this line was wrong:Command.CommandTarget = FMC_SDRAM_CMD_TARGET_BANK2; /* configure the Target Bank bits */...it should be:Command.CommandTarget = FMC_SDRAM_CMD_TARGET_BANK1; /* configure the Target Bank bits */...howeve...

ELowe · 2024-01-10

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ELowe · 2023-12-15

Thanks, I now understand that I only need to figure out how to sense connection of USB socket, and that can be done via voltage divider circuit.DP and DN are no problem because they are lower than 3.6V.

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STM32F4 is having problems with printf function in standallone mode

Trouble with SDRAM and STM32F469

STM32F4 and 5V tolerant GPIOs for USB usage

STM32 F4 crystal calculation and discrepancy with NUCLEO boards

Advanced timer 1 with DMA hangs if compare register equals 0

Re: STM32F4 is having problems with printf function in standallone mode

Re: Trouble with SDRAM and STM32F469

Re: Trouble with SDRAM and STM32F469

Re: Trouble with SDRAM and STM32F469

Re: STM32F4 and 5V tolerant GPIOs for USB usage