如何将CR95HF UART速度变化加快

你好路易斯，
 
使用ST的MB1054B RF收发器演示板和配置有UART的CR95HF意味着将SS10和SS11输入引脚设置为00并配置STm32 USART通信我已经重现了上述顺序。
所有工作都是默认值57600到2.26Mbps我用示波器检查了时序，2个探头连接到STm32提供的TX部分和CR95HF提供的RX反馈。
对于我的样本，以下是在UART波特率设置之后对echo命令进行的以下测量。
 
 加载的Valuefreq calculatedfreq预期Linux波特率TX 8bits（us）来自STM32RX 8位（us）来自CR95HFTX速率测量（bps）RX速率测量（bps）delta RX /波特率linux％
316950001500000 4.719417142851695131195130.70.130087
5113000011520007.117.07011125176113152620474.280.017773
6968571.4310000008.2218.2545973117.6969168.330831.670.030832
B56500057600014.21714.1243562706.6566399.89600.2490.016667
D484285.7150000016.44116.5128486588.4484472.715527.350.031055
E45200046080017.77517.7086450070.3451757.99042.0970.019623
1C233793.123040034.23234.1663233699.5234148.93748.8540.016271
3A114915.2511520069.55169.5833115023.5114970.1229.8850.001996
7557457.62757600139.009139.17657550.2357481.17118.82510.002063
我建议您在编程UART速度后执行echo命令时执行序列并测量RX和TX线上的数据速率。尝试使用3A和05，它似乎是LINUX值中最接近的。
 
希望它会有所帮助
RegardsPB



以下为原文




Hello Luis,

Using a MB1054B RF transceiver demonstration board from ST with a CR95HF configured with UART  means setting the SS10 and SS11 input pins to 00  and the STm32 USART communication configured I have reproduce your sequence described above.
All was working from default value 57600 up to 2.26MbpsI have checked the timings with an oscilloscope and 2 probes connected to TX part provided by the STm32 and RX feedbacks provided by the CR95HF.
With the sample I have,  here are the following measurements done on an echo command after the UART baud rate setting.

Loaded   Valuefreq calculatedfreq expected Linux baud  rateTX 8bits (us) from STM32RX 8 bits (us ) from CR95HFTX rate measured (bps)RX rate measured (bps)delta RX/Baud rate linux%
316950001500000 4.719417142851695131195130.70.130087
5113000011520007.117.07011125176113152620474.280.017773
6968571.4310000008.2218.2545973117.6969168.330831.670.030832
B56500057600014.21714.1243562706.6566399.89600.2490.016667
D484285.7150000016.44116.5128486588.4484472.715527.350.031055
E45200046080017.77517.7086450070.3451757.99042.0970.019623
1C233793.123040034.23234.1663233699.5234148.93748.8540.016271
3A114915.2511520069.55169.5833115023.5114970.1229.8850.001996
7557457.62757600139.009139.17657550.2357481.17118.82510.002063
I suggest you to execute your sequence and measure on RX and TX line the data rate when executing  an echo command after programming the UART speed. Try with 3A and 05 it seems to be the closest of the LINUX values.

Hope it will help
RegardsPB

嗨彼得
我有NFC工作
CR95HF UART的速率为1Mbps，现在已足够了。谢谢。
现在我需要CR95HF和TAG（NFC / RFID ST25DV64K）的数据速率
此时我的通信速率为@ 26Kbps，但我们需要53 kbps（支持53 kbit / s的数据速率，
 
快速命令）。
当我选择那个速度发送选择协议命令时（第5.4节“协议选择命令（0x02）描述”）
＆GT;＆GT;＆GT; 0x02020115
＆LT;＆LT;＆LT;为0x0000
在发送此命令并接收（接受命令）后，我忘记了与TAG的通信，
它是在TAG或NFC读卡器上启用此53Kbps速度的任何其他命令吗？
谢谢



以下为原文




Hi Peter
I have working the NFC
CR95HF UART at 1Mbps, that is enough for now. Thank you.

Now I need the data rate speed from CR95HF and TAG (NFC/RFID ST25DV64K)

At this time the I have communication @ 26Kbps, but we need 53 kbps (Supports the 53 kbit/s data rate with

Fast commands).
when I select that speed sending Select Protocol command (section 5.4 'Protocol Select command (0x02) description')
>>>0x02020115

<<<0x0000

after send this command and receive (accept command), I'm loosing the communication with TAG,

it is any other command to enable this 53Kbps speed at TAG or NFC reader?

Thank you

嗨路易斯，
 
如果您使用的是ST25DV64K，请参考芯片数据表以检查53kbps支持的命令。
http://www.st.com/resource/en/datasheet/st25dv64k.pdf
使用CR95HF，您必须在执行Fast命令之前通过protocol select命令切换速度。然后回到标准速度。
 
 
RegardsPYB



以下为原文




Hi Luis,

If you are using the ST25DV64K please refer to the chip datasheet in order to check the commands supported at 53kbps.
http://www.st.com/resource/en/datasheet/st25dv64k.pdf
Using the CR95HF you will  have to switch the speed via the protocol select command just before executing your Fast command. then go back to the standard speed.


RegardsPYB