Live & Learn
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STM32 LwIP测试过程简介 | 13707 | 0 | 1 | 2010-10-29 | |
MJPEG协议入门介绍 | 12824 | 2 | 2 | 2010-10-26 | |
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Qt编写串口通信程序全程图文讲解 | 71583 | 2 | 4 | 2010-10-19 | |
stm32调试 | 3168 | 0 | 0 | 2010-10-06 | |
从零开始在MDK中建立基于STM32F10x_StdPeriph_Driver V3.3.0的STM | 6890 | 0 | 0 | 2010-10-06 |
config20102009-11-19 19:38
外设fpga做的8k的memory,用arm9去读写它,在linux2.6系统下;这样做对吗?
实际地址映射到虚拟内存中,用得到的虚拟地址去读写。
地址总线:a1-a14 数据总线:d0-d15
#define FPGA_BASE_ADDR (0x18000000)//片选为nGCS3
#define BWSCON (0x48000000)
#define BANKCON3 (0x48000010)
#define IP_SIZE (0x1FFF)//13根地址线8K的物理空间
static void *bwscon,*bankcon3,*fpga_base_addr;
bwscon = ioremap_nocache(BWSCON,0x0000004);
bankcon3 = ioremap_nocache(BANKCON3,0x0000004);
fpga_base_addr = ioremap_nocache(FPGA_BASE_ADDR,IP_SIZE);
writel(readl(bwscon)|0xD000,bwscon);
writel(0x7FFC,bankcon3);
for(i=0;i