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Results tagged with stm32
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user 252789
The STM32 is the third ARM family by STMicroelectronics. It follows their earlier STR9 family based on the ARM9E core, and STR7 family based on the ARM7TDMI core. The STM32 is based on the ARM Cortex-M family of cores.
0
votes
1
answer
62
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STM32H7 JPEG encoding with DMA leaves empty space
I am encoding a 200x300 image using the JPEG codec available in the STM32H743. The input format is ARGB8888, with the input buffer having a size of 240000 bytes (200 x 300 x 4). As I do not know what …
- 109
1
vote
Accepted
STM32H7 JPEG encoding with DMA leaves empty space
After carefully reading the manual and the examples provided by ST I came to the conclusion that I was not performing the JPEG encoding operation correctly.
The raw RGB pixels must first be converted …
- 109
0
votes
1
answer
1k
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Problem with writing to 16-bit external SRAM from STM32 MCU
I have an STM32H743 Nucleo board, accessing an external 16-bit SRAM memory chip using the Flexible Memory Controller (FMC).
8 and 16-bit writes return the same values when reading them back. However, …
- 109
1
vote
Accepted
Problem with writing to 16-bit external SRAM from STM32 MCU
So this was the problem.
When I designed the board, I used the STM32IDE to check which pins served which purpose. E.g., which pins are used for address lines, FMC_Ax, and so on.
It turns out that two …
- 109
1
vote
2
answers
252
views
Unstable access to external MRAM when using Nucleo STM32 H7 board
When running on STM32 memory, they always work correctly. I have tried two different MRAM boards, with similar problems.
What could cause this erratic behaviour? … break;
default:
printf("Unsupported bit_size for write");
return -1;
}
}
return errors;
}
/* FMC initialization function , generated by STM32 …
- 109
1
vote
Accepted
Unstable access to external MRAM when using Nucleo STM32 H7 board
Embarassing to admit, but the problem, turns out, was in the "generate_random_mram_addresses" function which did not account for the possibility of duplicate addresses. Hence, the same address sometim …
- 109
1
vote
1
answer
205
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Freeing NUCLEO STM32 board pins for FMC interface use
I want to interface a Nucleo-H743ZI2 board (MB1364E) with a memory chip using STM32's FMC. …
- 109
0
votes
Accepted
Freeing NUCLEO STM32 board pins for FMC interface use
As per the answer given to me on ST's forum, this is a mistake in the board's manual:
https://community.st.com/t5/stm32-mcus-products/how-to-free-nucleo-stm32-board-pins-for-fmc-interface-use/td-p/122982 …
- 109