topic Re: K22 RAM分配问题 in Kinetis Microcontrollers

K22 RAM分配问题

liubinc — Tue, 20 Jun 2017 07:35:33 GMT

MCU:MK22FN512

RAM大小：两个64K组成128KB

问题：

程序中开辟了很多全局数组，如：

static double total_tem_data_y[128*8];
static double total_tem_data_z[128*8];

IAR编译链接OK后，出来的RAM空间6K readony data memory；70K readwrite data memory；

然后我再开辟一个全局数据 static double total_tem_data_x[128];128个double也才1K，加上之前的6K和70K也才77K的总大小。

编译链接后就报错了

Re: K22 RAM分配问题

Alice_Yang — Wed, 21 Jun 2017 05:27:54 GMT

Hello Liubin,

You can try to declare the SRAM as one "single" area instead two parts.

Please refer to this thread :

Help me out of this IAR compile Error : cannot fit "Block .bss"

Hope it helps

Have a great day,
TIC

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Re: K22 RAM分配问题

liubinc — Wed, 21 Jun 2017 06:47:43 GMT

Thank you very much sir, it worked.