About arnold_w

arnold_w · 2024-05-07

I'm working with the STM32F407G-DISC1 development board and I would like to generate a square wave on PB14 (TIM8_CH2N). I'm able to successfully toggle PB14 using "bit-banging" and I'm able to successfully generate square waves PC6 (TIM8_CH1) and PC8...

arnold_w · 2024-05-02

I'm working with the STM32F405 microcontroller and I recently ran out of RAM, but then I discovered that the 64 kB CCMRAM was completely unused. Given that the CCMRAM was supposed to be fast, I moved the stack and state variables of low-level drivers...

arnold_w · 2024-03-19

In the thread https://community.st.com/t5/stm32-mcus-embedded-software/why-does-my-tx-only-software-3-mbaud-uart-sometimes-send-strange/td-p/218077/page/2 I learned that "DSB" is a good way to waste a clock cycle in STM32F769. Now, what's a good way ...

arnold_w · 2024-01-29

I'm unable to connect to STM32F407-DISC1. STM32 ST-LINK Utility gives "No ST-LINK detected" and STM32CubeProgrammer gives "Error: No debug probe detected". I run Windows 10 Business on a Lenovo ThinkPad P1 Gen 3 computer and I have tried with 2 diffe...

arnold_w · 2023-08-30

I'm working with the STM32F7 microcontroller and I compile using STM32CubeIDE. I want to place myStruct on a specific location in RAM and I want it be initialized automatically:MEMORY { ... MY_STRUCT_MEMORY(rwx): ORIGIN = 0x20007BA0 LENGTH = 8 ...

arnold_w · 2024-05-08

TIMx_BDT->MOE is being set in HAL_TIM_OC_Start. I solved it like this instead:HAL_TIM_OC_Start(&htim8, TIM_CHANNEL_2);TIM8->CCER |= TIM_CCER_CC2NE;

arnold_w · 2024-05-06

What's your system clock?12 MHz

arnold_w · 2024-05-06

Upon further investigations I found that the stack will only be de facto located in CCMRAM when I click "Debug STM Application Debug" or "Run STM Application Debug", all other times it will go back to regular RAM. I verified that using uint32_t MySt...

arnold_w · 2024-05-02

I think it's strange that the problem goes away when I click "Restart", after that the Baud rate is correct (3 MBaud) and I can insert breakpoints and do everything else related to debugging and everything works just great.

arnold_w · 2024-05-02

So, I was going to reproduce the software UART Baud rate issue and I moved the stack to CCMRAM and upon further investigation it turns out the Baud rate depends on how I START my code! If I click "Debug STM Application Debug" (button with the insect ...

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How do I generate an Output Compare square wave on TIM8_CH2N using STM32CubeIDE?

Some guidelines on what's appropriate to put in CCMRAM on STM32F4 for optimal performance?

What's a good way to waste a clock cycle in STM32F4?

Unable to connect to STM32F407-DISC1 with STM32 ST-LINK Utility and STM32CubeProgrammer

How do I place an INITIALIZED struct on a specific location in RAM?

Re: How do I generate an Output Compare square wave on TIM8_CH2N using STM32CubeIDE?

Re: Some guidelines on what's appropriate to put in CCMRAM on STM32F4 for optimal performance?

Re: Some guidelines on what's appropriate to put in CCMRAM on STM32F4 for optimal performance?

Re: Some guidelines on what's appropriate to put in CCMRAM on STM32F4 for optimal performance?

Re: Some guidelines on what's appropriate to put in CCMRAM on STM32F4 for optimal performance?