请解释一下代码ram0_rd_reg_extd<=(~ram0_wr_addrt[2])&(|ram0_wr_addrt[1:0])|(ram0_wr_addrt[2])&(~(|ram0_wr_addrt[1:0]));
时间: 2024-01-24 19:18:20 浏览: 17
这段代码是 Verilog 语言的代码,用于描述一个寄存器的读使能信号。具体解释如下:
ram0_rd_reg_extd <= (~ram0_wr_addrt[2]) & (|ram0_wr_addrt[1:0]) | (ram0_wr_addrt[2]) & (~(|ram0_wr_addrt[1:0]));
其中,`ram0_rd_reg_extd` 表示一个寄存器的读使能信号,`ram0_wr_addrt` 是一个三位宽的信号,表示该寄存器的写地址。
这段代码的含义是:当写地址的第 2 位为 0 时(即 `~ram0_wr_addrt[2] == 1`),读使能信号为写地址的低两位的逻辑或(即 `|ram0_wr_addrt[1:0]`);当写地址的第 2 位为 1 时(即 `ram0_wr_addrt[2] == 1`),读使能信号为写地址的低两位的逻辑非(即 `~(|ram0_wr_addrt[1:0])`)。这个逻辑可以理解为,当写地址的第 2 位为 0 时,读使能信号为 1,即允许读取该寄存器的值;当写地址的第 2 位为 1 时,读使能信号为 0,即禁止读取该寄存器的值。
相关问题
17:07:28.846]收←◆CPU0.Hello World# ISP code version: b12ddbf0-dirty Build time: May 5 2023 16:43:39 CPU1.UP: [17:07:28.878]收←◆[CPU0] [ispv4]enable pmic of all modules OK [CPU0] [ispv4]enable pmu of all modules OK [CPU0] [ispv4]ddr_bringup_power: ddr_bringup_power start [17:07:29.052]收←◆[CPU0] [ispv4]ddr_boot_proc: ddr total boot time 10622640(ns) [CPU0] [ispv4]ddr_regulator_info: name default_uv cur_uv step use_cnt open_cnt [CPU0] [ispv4]ddr_regulator_info: -------------------------------------------------------------------------- [CPU0] [ispv4]ddr_regulator_info: ddr_vdd 750000 750000 25000 1 2 [CPU0] [ispv4]ddr_regulator_info: ddrphy_vdd1 1800000 1800000 50000 1 2 [CPU0] [ispv4]ddr_regulator_info: ddrphy_vdd2 1120000 1120000 5000 1 3 [CPU0] [ispv4]ddr_regulator_info: ddrphy_vddq 612500 612500 12500 1 2 [CPU0] [ispv4]ddr_info_show: [vendor info] 0x6 [tar freq id] 0x0 [cur freq] 4266 [CPU0] [ispv4]ddr_boot_proc: ddr rw test passed [CPU0] [ispv4]ddr_boot_proc: ddr quick boot passed! [CPU0] [ispv4]ddr_temp_intr_reg: [ddr_temp_intr_reg] proc succ. [[CPU0] [ispv4]Wait FW1 load (timeout=1500.000ms)... CPU0] [ispv4]Wait FW1 load[CPU0] [ispv4]mbox received 15 0 0 1 [CPU0] [ispv4]FW1 load finish. [CPU0] [ispv4]Check DRAM flag pass [CPU0] [ispv4]Boot source: 1 [CPU0] [ispv4]FW load interface: 1 [CPU0] [ispv4][2STAGE_BOOT]clear bss in DRAM(s=0x800 e(2t7idm0e,oeu=t0=x18500100.4030004m,ss)i.z.e.=0x 2[1CbP3U40)] [is[CpPvU40]]m b[oixs prve4c]eNiov ende e1d5 t0o 0s e1nd t[rCaPiUn0i]n g[ idsaptva4.] FW1 load finish[CPU0] [ispv4.]Bo o[tCPU0] [ispv4]Check DRAM flag pass [CPU0] [ispv4]Boot source: 1 [CPU0] [ispv4]FW load interface:t 1 [CPU0] [ispvi4m]e[:2 S1T9A3G3E1_3BuOsO T]clear bss in DRAM(s=0x800e27d0,e=0x80104304,size=0x21b34) [CPU0] [ispv4]No need to send training data. [CPU0] [ispv4]BooMAX TIME:SW IRQ-0(0) PPL-0(0x0) tALGO MAX TIME: FESOF: fe 0.000 ms, be 0.000 ms, FEEOF 0.000 ms, BEEOF 0.000 ms time: 193313us NuttShell (NSH) NuttX-10.1.0 ispv4> [K [17:07:29.455]收←◆ 0.147388|CPU0|I|hwl.bwadj| ###isp_device_init: initialize all isp devices 0.147431|CPU0|I|hwl.extd|###ext_device_init: initialize all isp ext devices
这段log信息是一段系统启动时的输出信息,其中包括了ISP设备和外设的初始化过程。可以看到,系统首先完成了DDR内存的初始化和检测,然后开始初始化所有的ISP设备和外设。在这个过程中,系统还会输出一些调试信息,例如当前的DDR内存频率和供电电压等。这些信息可以帮助系统管理员进行故障排查和调试。如果您遇到了系统启动故障或者ISP设备和外设无法正常工作的问题,这些信息可能会对您有所帮助。
[a:iv].Clear [a1:h1] = Split("Project,Item Number,Item Description,Qty Onhand, Extd Cost,Aging,Trans Date,SubInv", ",")
这是一段VBA代码,用于在Excel中清除范围[a:iv]的内容,并将字符串"Project,Item Number,Item Description,Qty Onhand, Extd Cost,Aging,Trans Date,SubInv"按逗号分隔后,分别赋值给[a1:h1]这个范围的单元格。
这段代码的作用是清除指定范围的内容并将新的值赋给指定的单元格范围。如果您需要更多帮助或有其他问题,请随时提问。
相关推荐
![zip](https://img-home.csdnimg.cn/images/20210720083736.png)
![pdf](https://img-home.csdnimg.cn/images/20210720083512.png)
![pdf](https://img-home.csdnimg.cn/images/20210720083512.png)
![zip](https://img-home.csdnimg.cn/images/20210720083736.png)
![pdf](https://img-home.csdnimg.cn/images/20210720083512.png)
![zip](https://img-home.csdnimg.cn/images/20210720083736.png)
![zip](https://img-home.csdnimg.cn/images/20210720083736.png)
![zip](https://img-home.csdnimg.cn/images/20210720083736.png)
![zip](https://img-home.csdnimg.cn/images/20210720083736.png)
![zip](https://img-home.csdnimg.cn/images/20210720083736.png)
![gz](https://img-home.csdnimg.cn/images/20210720083447.png)
![zip](https://img-home.csdnimg.cn/images/20210720083736.png)