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Sep
2
[2008.08.04]
同时使用EDK和Sysgen，有两种流程：
1、在Sysgen中做hw co-sim；
2、用Sysgen生成pcore然后手动添加到EDK工程中。
参考文档：
- Sysgen User Guide --> Hardware/Software Co-Design --> Design with Embedded Processors and Microcontrollers
- API Documents (在生成PCORE的src目录中)
数据交互方法：
- From/To Registers
- From/To FIFO
- Shared Memory
使用Shared Memory时，记得TestBench中的Shared Memory要设置成 "owned and initialized elsewhere"，否则等于两处地方都放置了同样名字的Shared Memory，会产生冲突。
API使用方法
参考API文档，下面有例子。基本流程是：
[2008.09.02]
以上的方法是使用了一个ConfigurationTable。因为Overhead比较大，所以Performance比较低。
另一种直接的读写方法是使用指针。
每块Share Memory的起始地址都可以在xparameters.h中找到。知道了起始地址，使用指针可以很方便得对内容进行读写。
同时使用EDK和Sysgen，有两种流程：
1、在Sysgen中做hw co-sim；
2、用Sysgen生成pcore然后手动添加到EDK工程中。
参考文档：
- Sysgen User Guide --> Hardware/Software Co-Design --> Design with Embedded Processors and Microcontrollers
- API Documents (在生成PCORE的src目录中)
数据交互方法：
- From/To Registers
- From/To FIFO
- Shared Memory
使用Shared Memory时，记得TestBench中的Shared Memory要设置成 "owned and initialized elsewhere"，否则等于两处地方都放置了同样名字的Shared Memory，会产生冲突。
API使用方法
参考API文档，下面有例子。基本流程是：
引用
xc_iface_t *iface; //初始化interface
xc_from_reg_t *fromreg_gray; //初始化register
xc_to_reg_t *toreg_red, *toreg_green, *toreg_blue; //初始化register
xc_shram_t *shram; //初始化shared memory
xc_to_fifo_t *tofifo; //初始化fifo
// initialize the software driver
xc_create(&iface, &RGB2GRAY_PLBW_ConfigTable[0]);
// obtain the memory locations
xc_get_shmem(iface, "result", (void **) &fromreg_gray); //Register 中间引号中的字符串是Sysgen中起的名字
xc_get_shmem(iface, "red", (void **) &toreg_red);
xc_get_shmem(iface, "green", (void **) &toreg_green);
xc_get_shmem(iface, "blue", (void **) &toreg_blue);
xc_get_shmem(iface, "cap_ram0", (void **) &shram); //Shared Memory
xc_get_shmem(iface, "fifo", (void **) &tofifo); //Shared Memory
//写Shared Memory
for (i=0;i<10;i++) {
xc_write(iface, xc_get_addr(shram->addr, i), (const unsigned) i+60);
}
//写Register
xc_write(iface, toreg_red->din, 2);
//读 Register
xc_read(iface, fromreg_result->dout, &result);
xc_from_reg_t *fromreg_gray; //初始化register
xc_to_reg_t *toreg_red, *toreg_green, *toreg_blue; //初始化register
xc_shram_t *shram; //初始化shared memory
xc_to_fifo_t *tofifo; //初始化fifo
// initialize the software driver
xc_create(&iface, &RGB2GRAY_PLBW_ConfigTable[0]);
// obtain the memory locations
xc_get_shmem(iface, "result", (void **) &fromreg_gray); //Register 中间引号中的字符串是Sysgen中起的名字
xc_get_shmem(iface, "red", (void **) &toreg_red);
xc_get_shmem(iface, "green", (void **) &toreg_green);
xc_get_shmem(iface, "blue", (void **) &toreg_blue);
xc_get_shmem(iface, "cap_ram0", (void **) &shram); //Shared Memory
xc_get_shmem(iface, "fifo", (void **) &tofifo); //Shared Memory
//写Shared Memory
for (i=0;i<10;i++) {
xc_write(iface, xc_get_addr(shram->addr, i), (const unsigned) i+60);
}
//写Register
xc_write(iface, toreg_red->din, 2);
//读 Register
xc_read(iface, fromreg_result->dout, &result);
[2008.09.02]
以上的方法是使用了一个ConfigurationTable。因为Overhead比较大，所以Performance比较低。
另一种直接的读写方法是使用指针。
每块Share Memory的起始地址都可以在xparameters.h中找到。知道了起始地址，使用指针可以很方便得对内容进行读写。
引用
In the following code snippet, users can read data from a "From Register" shared memory named "FROMREG1" and write it to a "To Register" shared memory named "TOREG1":
volatile unsigned value;
unsigned *fromreg_plb_data;
unsigned *toreg_plb_data;
// get the absolute shared memory addresses from "xparameters.h"
fromreg_plb_data = XPAR_SG_PLBIFACE_0_MEMMAP_FROMREG1;
toreg_plb_data = XPAR_SG_PLBIFACE_0_MEMMAP_TOREG1;
// read data from shared memory "FROMREG1"
value = *fromreg_plb_data;
// write data to shared memory "TOREG1"
*toreg_plb_data = value;
volatile unsigned value;
unsigned *fromreg_plb_data;
unsigned *toreg_plb_data;
// get the absolute shared memory addresses from "xparameters.h"
fromreg_plb_data = XPAR_SG_PLBIFACE_0_MEMMAP_FROMREG1;
toreg_plb_data = XPAR_SG_PLBIFACE_0_MEMMAP_TOREG1;
// read data from shared memory "FROMREG1"
value = *fromreg_plb_data;
// write data to shared memory "TOREG1"
*toreg_plb_data = value;
