查看EFM32的源代码

== User Data Flash ==

All members of the EFM32 family provide a single page of flash memory for storing "user" data. 

It is located at address: 0x0FE0 0000 on all devices

<source lang=bash>
Device		User Page Size(words)		User Page Size(bytes)
Gecko				128						512
Giant Gecko			1024					4096
Tiny Gecko			128						512
Wonder Gecko		512						2048
Leopard Gecko		512						2048
Zero Gecko			256						1024
Pearl Gecko			512						2048
Jade Gecko			512						2048
</source>


'''Examples:'''

<source lang=cpp>
#define USERDATA_BASE     (0x0FE00000UL) /**< User data page base address */
///////////////////////////////////////////////////
uint32_t *addr = (uint32_t *)0x0FE00000;
uint32_t data = 0x00EF3200;

MSC_Init();
MSC_ErasePage(addr);
MSC_WriteWord(addr, &data, sizeof(data));
MSC_Deinit();
</source>

写 main flash 和上面一样的代码，addr 可设为 0x7c00 (32K - 1K)


Refer to: 

* https://www.silabs.com/community/mcu/32-bit/knowledge-base.entry.html/2016/12/12/accessing_constants-Zc3J
* https://www.silabs.com/community/software/simplicity-studio/forum.topic.html/efm32_developmentde-LqeK
* https://siliconlabs.github.io/Gecko_SDK_Doc/efm32g/html/group__MSC.html

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