2.2.2 将BSS段添加到外部RAM 第13行中选择Allow .bss segment placed in external memory,可以将BSS段的lwip、net80211、libpp 和 bluedroid ESP-IDF 库中零初始化的数据存入外部RAM。此外全局变量,静态变量也可以放到外部RAM中,只需要在变量声明的地方加上宏EXT_RAM_ATTR,并将变量初始化为0。
除了崩溃任务的 TCB 和栈外,位于外部 RAM 中的数据不会保存到核心转储文件中,包括使用 EXT_RAM_BSS_ATTR 或EXT_RAM_NOINIT_ATTR 属性定义的变量,以及存储在 extram_bss 段中的任何数据。 备注该功能仅在使用 ELF 文件格式时可用。 将核心转储保存到 flash 将核心转储文件保存至 flash 时,这些文件会保存到 ...
通过检查 CONFIG_SPIRAM_ALLOW_BSS_SEG_EXTERNAL_MEMORY 启用该选项,此选项配置与上面三个选项互不影响。 启用该选项后,从 0x3F800000 起始的地址空间将用于存储来自 lwip、net80211、libpp 和 bluedroid ESP-IDF 库中零初始化的数据(BSS 段)。 EXT_RAM_ATTR 宏应用于任何静态声明(未初...
I tried to put EXT_RAM_BSS_ATTR , example: EXT_RAM_BSS_ATTR cv::QRCodeDetector QRdetecter; but didnt't work , dram.bss still overload, i read there is also possible to place the BSS section of a component or a library to external RAM using linker fragment scheme extram_bss. But...
seem to be a Typo in Wiki. .ext_ram.bss seem to be the right one. EXT_RAM_ATTR definition points to _SECTION_ATTR_IMPL(".ext_ram.bss", __COUNTER__)matsumoto Posts: 2 Joined: Fri Oct 14, 2022 3:13 pm Re: How do I use extram_bss in CMakeLists?
Additional data can be moved from the internal BSS segment to external RAM by applying the macro ``EXT_RAM_ATTR`` to any static declaration (which is not initialized to a non-zero value). 9797 98+ It is also possible to place the BSS section of a component or a library to external ...
*/ #define IRAM_ATTR __attribute__((section(".iram1"))) void IRAM_ATTR call_start_cpu0() { cpu_configure_region_protection(); //Clear bss memset(&_bss_start, 0, (&_bss_end - &_bss_start) * sizeof(_bss_start)); /* completely reset MMU for both CPUs (in case serial ...
Re: psram使用by Gargamel » Mon Jul 26, 2021 7:57 am 可以给变量加上 EXT_RAM_ATTR 的属性,但需要在 menuconfig 中先把 “Allow .bss segment placed in external memory” 打开。这个功能暂时在 S2 上没完整实现,相关问题请在 https://www.esp32.com/viewtopic.php?f=25&t=22392 帖子中跟进。
*(.ext_ram.bss*) _bt_bss_start = ABSOLUTE(.); *libbt.a:(.bss .bss.* COMMON) . = ALIGN (4); _bt_bss_end = ABSOLUTE(.); _btdm_bss_start = ABSOLUTE(.); *libbtdm_app.a:(.bss .bss.* COMMON) . = ALIGN (4); _btdm_bss_end = ABSOLUTE(.); _nimble_bss...
I tried to put EXT_RAM_BSS_ATTR , example: EXT_RAM_BSS_ATTR cv::QRCodeDetector QRdetecter; but didnt't work , dram.bss still overload, i read there is also possible to place the BSS section of a component or a library to external RAM using linker fragment scheme extram_bss. But...