About arnold_w

arnold_w · 2025-02-13

I'm working with the STM32F769 microcontroller and I've defined a new section in the linker script using instructions from https://www.openstm32.org/Using%2BCCM%2BMemory : /* Emulated RAM in the JPEG peripheral */ HACK_RAM_JPEG_HUFFENC_AC0 (rwx): ORI...

arnold_w · 2025-02-12

I've been assigned the task of reducing RAM usage on an STM32F769 microcontroller running FreeRTOS. I've done the usual stuff (packed structs and specified the number of bits each member needs, made all the XXXX_InitTypeDef and other de facto constan...

arnold_w · 2024-12-10

I'm working with the STM32F407G-DISC1 development board. I would like to change the contents of RAM and hence I type ST-LINK_CLI.exe -w8 0x20000000 0xAB:ST-LINK_CLI.exe -w8 0x20000000 0xAB STM32 ST-LINK CLI v3.6.0.0 STM32 ST-LINK Command Line Interfa...

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 · 2025-02-13

I solved it by calling a regular C-function (placed inside a C-file) from the assembler code:.extern InitHackMemory /* Declare external C function */ LoopFillZerobss: ldr r3, = _ebss cmp r2, r3 bcc FillZerobss /* Call the clock system int...

arnold_w · 2025-02-12

So far I have found these good candidates:CAN1:48 CAN_TypeDef->sTxMailBox32 CAN_TypeDef->sFIFOMailBox224 CAN_TypeDef->sFilterRegisterCAN2:48 CAN_TypeDef->sTxMailBox32 CAN_TypeDef->sFIFOMailBox224 CAN_TypeDef->sFilterRegisterCAN3:48 CAN_TypeDef->sTxMa...

arnold_w · 2024-12-10

Use the HOTPLUG option:ST-LINK_CLI.exe -c HOTPLUG -w8 0x20000000 0xAB

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

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modify startup_stm32f769xx.s so that newly added memory range is initialized ?

Lesser known buffers/registers to act as RAM in STM32F769?

Unable to modify RAM using ST-LINK_CLI.exe

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?

Re: modify startup_stm32f769xx.s so that newly added memory range is initialized ?

Re: Lesser known buffers/registers to act as RAM in STM32F769?

Re: Unable to modify RAM using ST-LINK_CLI.exe

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?