TETRA 是一种最先进的PMR 蜂窝通信系统,已成功地在全球广泛部署。随着TETRA 网络的成长,网络管理员有时很难保证网络性能满足专业用户的高质量要求。在成熟的TETRA 网络中,许多人不断地进行网络配置。小区和小区集群不断增加后,需要调整大量定义TETRA 行为的参数中部分参数的设置。
2019-06-14 06:42
道抑制能力范围从30dB到90dB。信道间隔12.5k的PMR系统中使用的中心频率21.4M,通道7.5kHz的晶体滤波器,带外抑制能力可达90dB(距离中心点8.75k)。中频滤波器必须考虑频率偏差
2019-06-24 08:09
门铃、遥控开关、遥控鼠标、键盘等。专业无线电遥控产品(PMR) 例如:专业无线对讲机、无线麦克风等。有绳电话、传真、MODEM、电话答录机、小总机(PABX)无绳电话CTO、CT1、CT1+…ISDN
2016-07-20 09:16
门铃、遥控开关、遥控鼠标、键盘等。专业无线电遥控产品(PMR) 例如:专业无线对讲机、无线麦克风等。有绳电话、传真、MODEM、电话答录机、小总机(PABX)无绳电话CTO、CT1、CT1+…ISDN
2016-07-20 09:17
{unsigned char :5;unsigned char B2:1;unsigned char B1:1;unsigned char B0:1;} BIT;} PMR;char wk3[31];union
2018-07-23 00:47
,0x085 TPD,0x340x166 TPF,0x36,0x607 TPVT,0x35,0x708 PMR,0x49,0xc0所有必需的数据都可以使芯片在DVI输出模式下正常工作另外我理解:一个
2020-06-12 15:42
嗨,到目前为止,我正试图在SPC58x系列上启用性能监视器。我尝试了以下方法: e_lis%r3,0x8000 e_or2i%r3,0x0000 mtpmr 400,%r3#冻结所有全局计数器e_lis%r3,0x27 e_or2i%r3,0x0000 #event 39 mtpmr 144,%r3#在计数器0中设置管道停止事件e_lis%r3,0x39 e_or2i%r3,0x0000 #event 57 mtpmr 145,%r3 #set up数据缓存行填充计数器1中的事件e_lis%r3,0x0 e_or2i%r3,0x0 mtpmr 400,%r3#取消冻结所有全局计数器但计数器寄存器(PMCx)根本没有增加。我错过了什么?谢谢,大卫以上来自于谷歌翻译以下为原文 Hi,I'm trying to enable performance monitor on SPC58x series without luck so far. I tried the following:e_lis %r3, 0x8000 e_or2i%r3, 0x0000 mtpmr 400, %r3 # freeze all global counterse_lis %r3, 0x27 e_or2i%r3, 0x0000 #event 39 mtpmr 144, %r3 #set up pipeline stall event in counter 0e_lis %r3, 0x39 e_or2i%r3, 0x0000 #event 57 mtpmr 145, %r3 #set up data cache line fills event in counter 1e_lis %r3, 0x0 e_or2i%r3, 0x0 mtpmr 400, %r3 # un-freeze all global countersBut the counter register (PMCx) do not increase at all. What am I missing?Thank's, David
2019-01-24 13:50
I encountered the following problems when I output M432P401R P4.2. I can't make LFXTCLK_ON 1. I refer to the example of MSP432P401R for the output of 48MHz, but it is still unable to output the external crystal vibration of P4.2.I need your help. I look forward to your reply.thank you
2018-06-21 12:09
嗨是通过“i2c接口”配置dvi控制器时所需的xclk时钟等你的回复最好的祝福
2019-09-02 10:07
嗨,我们正在开发自定义板使用18F25K50,与USB CDC。为此,我们尝试过MCC,但我们是不幸运的。然后我们遇到了vLoki先生发布的“LPCF-FSUBBJ-X-R3”。在我们的应用中,我们希望给USPCDC中断低优先级和应用中断高优先级。中断在文件“St.C”中定义,如下面附图所示的43-59行。对于高优先级和Low优先级中断的代码块的改变是否足够?或者我们需要修改其他USB堆栈文件中的中断相关代码,或者我们可以使用一个ISR,其中中断可以按照我们想要的顺序来检查吗?那样的话,我们应该在哪里兑换感谢呢? 以上来自于百度翻译 以下为原文 Hi,we are developingcustom board using 18F25K50, with USB CDC. For this we have tried MCC, but we are unluckky. Then we came across "LPC_FSUSB_CDC-X-r3" released by Mr. vLoki.In our application, we want to give USB_CDC interrupt LOW-PRIORITY & application interrupts HIGH-PRIORITY.The interrupts are defined in file "system.c" at lines 43-59 as shown in image attached below. To change Interrupt priority, exchange of code blocks for High & Low priority interrupts is enough ?or do we need to modify interrupts related code in other u*** stack files.or can we use one ISR in which interrupts can be checked in the order we want?, in that case where shall we change the code with thanks, Attached Image(s)
2018-09-19 15:29