不能用RAM的不同部分

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唐纳德d|

楼主 | 2025-6-25 22:34 | 只看该作者回帖奖励

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RAM, AMD, ck, or, ig

用STM32H7和STM32 Cube IDE在linker script中添加了这个：

/* Memories definition */MEMORY{ DTCMRAM (xrw) : ORIGIN = 0x20000000, LENGTH = 128K ITCMRAM (xrw) : ORIGIN = 0x00000000, LENGTH = 64K RAM_D1 (xrw) : ORIGIN = 0x24000000, LENGTH = 512K RAM_D2 (xrw) : ORIGIN = 0x30000000, LENGTH = 288K RAM_D3 (xrw) : ORIGIN = 0x38000000, LENGTH = 64K FLASH (rx) : ORIGIN = 0x8000000, LENGTH = 1024K} /* Sections */SECTIONS{ .ramd2block : { . = ALIGN(4); _sramd2block = .; /* create a global symbol at ccmram start */ *(.ramd2block) *(.ramd2block*) . = ALIGN(4); _eramd2block = .; /* create a global symbol at ccmram end */ } > RAM_D2 .ramd3block (NOLOAD) : { KEEP(*(.ramd3section)) } > RAM_D3

但它会一直在DTCM RAM中定位此缓冲区：

uint8_t SPI1_TxBuffer[READBACK_LENGTH] __attribute__(( section(".ramd2block") )); // SPI Tx

当我看.map：

.ramd2block 0x00000000200001f8 0x1b load address 0x000000000800e2f4 .ramd2block 0x00000000200001f8 0x1b Core/Src/main.o 0x00000000200001f8 SPI1_TxBuffer 0x0000000020000214 . = ALIGN (0x4)

0x2000000在DTCM RAM中，为什么链接器没有在RAM_D2中定位缓冲区

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