21 lines
816 B
Plaintext
21 lines
816 B
Plaintext
MEMORY
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{
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FLASH : ORIGIN = 0x08000000, LENGTH = 512K
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/*
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* STM32F722 RAM totals 256 KiB:
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* - DTCM: 64 KiB at 0x2000_0000; inaccessible to DMA1 and DMA2.
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* - SRAM1: 176 KiB at 0x2001_0000; contiguous and DMA2-accessible.
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* - SRAM2: 16 KiB at 0x2004_C000; a separate bank after an address gap.
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*
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* Why use SRAM1 as the only default RAM region: the MPU6000 SPI DMA buffers
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* and USART1 TX DMA frames are ordinary RTIC task-local/static allocations.
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* Mapping `RAM` to DTCM would let the linker place those buffers where DMA2
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* cannot read or write them which would lead transfer faults or corrupted data.
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*
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* Therefore all default allocations use SRAM1 to make DMA reachability the
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* safe default rather than a per-buffer convention.
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*/
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RAM : ORIGIN = 0x20010000, LENGTH = 176K
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}
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