This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

AM3352 GPMC 外接SRAM地址分配对应问题

Other Parts Discussed in Thread: AM3352

大家好,我现在用AM3352外接一片16bit 异步SRAM,有关地址对应问题我看到文章"AM335X GPMC模块地址区域划分详解"一文中有所介绍,但是寄存器GPMC_CONFIG7中,bit[5:0]对应的基址不太理解,Bits [5-0]手册介绍是 ”corresponds to A29, A28, A27, A26, A25, and A24.”怎么理解呢?

加载驱动后,SRAM的地址映射地址跟实际的SRAM地址A0~A15是什么关系呢?比如映射首地址是c8bf8000实际对应的是SRAM的地址0x0000吗?

TRM中硬件连接如下所示:


这里的地址线的连接,gpmc_a0没有用到是吗?如果SRAM有19位地址线A0~A18,那实际连接的时候是连接gpmc_a1~a19 ?


Getting Chip Select
GPMC revision 6.0
GPMC_CS_CONFIG1 value 0x1001000
GPMC_CS_CONFIG2 value 0x121201
GPMC_CS_CONFIG3 value 0x0
GPMC_CS_CONFIG4 value 0x100a100a
GPMC_CS_CONFIG5 value 0x101213
GPMC_CS_CONFIG6 value 0x180
GPMC_CS_CONFIG7 value 0xf00
Got CS1, address = 1000000
srambase = c8bf8000
GPMC_CS_CONFIG7 value 0xf41