全部博文（92）
| 标题 | 阅读 | 评论 | 转发 | 发布日期 | |
|---|---|---|---|---|---|
| Linux Socket API | 1340 | 0 | 0 | 2009-09-15 | |
| Bluetooth Structure | 3177 | 0 | 0 | 2009-09-14 | |
| usage of function pointer | 1015 | 0 | 0 | 2009-09-02 | |
| dynamic memory heap and stack | 1128 | 0 | 0 | 2009-09-02 | |
| C language extensions library function | 1093 | 0 | 0 | 2009-09-02 | |
| c language standard library function | 1018 | 0 | 0 | 2009-09-02 | |
| inter-process communication | 1783 | 0 | 0 | 2009-08-24 | |
| Process and Process Scheduling | 1065 | 0 | 0 | 2009-08-24 | |
| Linux standard I/O flow | 997 | 0 | 0 | 2009-08-23 | |
| linux system calls | 1104 | 0 | 0 | 2009-08-22 | |
| Loadable Modules | 1086 | 0 | 0 | 2009-08-21 | |
| My beginning in embeded system--ARM7 | 866 | 0 | 0 | 2009-08-21 |
config20102009-11-19 20:21
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
