gb_wr2^=temp;
时间: 2024-04-15 14:24:15 浏览: 16
这行代码是在C语言中对变量 `gb_wr2` 进行位异或运算并将结果赋值给 `gb_wr2`。其中 `^=` 是位异或赋值运算符,表示对 `gb_wr2` 和 `temp` 进行位异或操作,并将结果赋值给 `gb_wr2`。
例如,如果 `gb_wr2` 的值为 `0b1010`,`temp` 的值为 `0b1100`,则执行该操作后,`gb_wr2` 的值会变为 `0b0110`。
注意,这行代码的效果等同于 `gb_wr2 = gb_wr2 ^ temp;`,即先执行位异或操作,然后将结果赋值给 `gb_wr2`。
相关问题
always@(cu_state, pc, md_rd)begin case(cu_state) 2'b00: begin //reset cu_state_tmp = 2'b01; pc_tmp = pc; ir_tmp = 16'b0; acc_tmp = acc; mar = 13'b0; wr = 1'b0; rd = 1'b0; md_wr = 8'b0; end 2'b01: begin cu_state_tmp = 2'b10; //cu_state_tmp = cu_state_tmp + 1 pc_tmp = pc + 13'b1; ir_tmp = {8'b0, md_rd}; acc_tmp = acc; mar = pc; wr = 1'b0; rd = 1'b1; md_wr = 8'b0; end 2'b10: begin cu_state_tmp = 2'b11; //cu_state_tmp = cu_state_tmp + 1 pc_tmp = pc + 13'b1; ir_tmp = {md_rd, ir[7:0]}; acc_tmp = acc; mar = pc; wr = 1'b0; rd = 1'b1; md_wr = 8'b0; end 2'b11: begin cu_state_tmp = 2'b01; ir_tmp = 16'b0; pc_tmp = pc; //mar = 13'b0; //wr = 1'b0; //rd = 1'b0; //md_wr = 8'b0; ALU; end default: begin cu_state_tmp = 2'b00; pc_tmp = 8'b0; ir_tmp = 16'b0; acc_tmp = acc; mar = 13'b0; wr = 1'b0; rd = 1'b0; md_wr = 8'b0; end endcase end加入间接寻址周期
在这段代码中,加入间接寻址周期可以通过在cu_state为特定状态时,设置mar变量的值为acc寄存器中存储的内容。具体实现方法如下:
在case语句中添加一个新的分支,当cu_state为特定状态时执行间接寻址周期:
```
2'b11: begin // 间接寻址周期
cu_state_tmp = 2'b01;
ir_tmp = 16'b0;
pc_tmp = pc;
mar = acc; // 设置mar为acc寄存器中存储的内容
wr = 1'b0;
rd = 1'b1;
md_wr = 8'b0;
end
```
需要注意的是,间接寻址周期在cu_state为2'b11时执行,因此需要在此分支中执行ALU操作,而不是在默认分支中执行。
Read Spd Begin... The memory on CH :1 are different! N: pre svc call fun = 0xc2000f04 -- pm-1 = 0, pm-2 = 29819750, pm-3 = 0 N: ddr fun = 0x0 -- pm = 0x29819750, pm2 = 0x0 N: parameter mcu: v0.5 Mcu Start Work ... get_clocks_value: scpi send command start: 0x10 scpi send command success get clocks = 533 MHZ pll_scp_num = 8 Lmu Freq = 1066Mhz ch = 0 parameter set ch closed! DIMM Don't Probed! ch = 1 the dimm info is from uboot... Dimm_Capacity = 8GB Mcu Channel 1 AES configuration begin... AES bypass end... TZC configuration begin... TZC bypass end... use_0x14 == 0xb0100 ctl_cfg_begin...... pi_cfg_begin...... phy_cfg_begin...... fast mode caslat = 15 wrlat = 14 tinit = 856000 r2r_diffcs_dly = 4 r2w_diffcs_dly = 5 w2r_diffcs_dly = 3 w2w_diffcs_dly = 7 r2w_samecs_dly = 4 w2r_samecs_dly = 0 r2r_samecs_dly = 0 w2w_samecs_dly = 0 ch 1 adapter_alg -- 0-0-0-0-0-0-0 rtt_wr = dis rtt_park = 80ohm ron = 34ohm val_cpudrv = 34 rtt_nom = 48ohm val_cpuodt = 48 vref_dev = 10 vrefsel = 0x45 dq_oe_timing = 0x42 rank_num_decode = 1 set phy_indep_init_mode set pi_dram_init_en set_pi_start & ctl_start...... wait init complete...... init complete done...... wait complete done...... rddqs_lat = 0x2 tdfi_phy_rdlat = 0x1f begin software ntp training... rank_num: 0 phy_write_path_lat_add =-1-1-1-1-1-1-1-1-1 phy_write_path_lat_add = 0 0 0 0 0 0 0 0 0 phy_write_path_lat_add = 1 1 1 1 1 1 1 1 1 phy_write_path_lat_add = 2 2 2 2 2 2 2 2 2 phy_write_path_lat_add = 3 3 3 3 3 3 3 3 3 phy_write_path_lat_add = 4 4 4 4 4 4 4 4 4 rank 0 wdqlvl! r2r_diffcs_dly = 4 r2w_diffcs_dly = 7 w2r_diffcs_dly = 4 w2w_diffcs_dly = 6 r2w_samecs_dly = 5 rank 0 ch 1 training fail
根据您提供的信息,似乎是内存训练过程中出现了错误。错误信息中指出了CH1内存信息不同的问题,以及训练过程中的一些参数和配置。其中,"Mcu Channel 1 AES configuration begin... AES bypass end... TZC configuration begin... TZC bypass end... use_0x14 == 0xb0100 ctl_cfg_begin"等信息表示内存控制器的一些配置和初始化过程。而"rank 0 wdqlvl! r2r_diffcs_dly = 4 r2w_diffcs_dly = 7 w2r_diffcs_dly = 4 w2w_diffcs_dly = 6 r2w_samecs_dly = 5 rank 0 ch 1 training fail"则表示在对CH1的rank0进行写数据时出现了训练失败的情况。
具体的原因可能需要进一步分析,可能与内存硬件、时序参数、内存控制器等方面有关。建议您尝试重新启动或重新插拔内存模块,并检查是否有硬件故障或不良连接的情况。同时,您也可以检查内存访问时序参数和内存控制器的配置是否正确。如果问题仍然存在,建议您查看更详细的错误信息或寻求专业的技术支持。
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