用PN7462AU的io口模拟串口是否可行

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用PN7462AU的io口模拟串口是否可行

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276642088
Contributor II

您好:

           1.我想用PN7462AU的io口模拟串口(波特率是 115200)是否可行?

           2.我测试了一下,一个io写高电平然后返回的时间为2.5us,写一个低电平然后返回的时间也是2.5us,能否有更快的速度,我测试过其他单片机的周期为330ns

           3.读取一个io管脚的周期在3us左右,能够更快呢?

           4.我把例程按照要求烧录到开发板里,然后按RST_N键,为什么不能运行?(我调试的时候又没有问题)

              (我的开发板型号  :   PNEV7462B V2.2)

           5.我把历程phExRf用调试的方式测试,运行正常,但是我实际烧录进去却不行,请问是怎么回事,(我也有先运行user_ee.bat,在把得到的新的user_ee.bin烧录进去)可以以调试的方式烧录进去却没事。

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jimmychan
NXP TechSupport
NXP TechSupport
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276642088
Contributor II

其实我想确认的是问题    1   2   3   ,我的设备需要一个usb,一个串口(115200),就是不知道怎样能实现这个功能。或者模拟的话如何模拟,能不能成功

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weidong_sun
NXP TechSupport
NXP TechSupport

Hello Xubin,

    PN7462 can support HSUART and USB interface Simultaneously, see below, please!

pastedImage_1.png

pastedImage_2.png

pastedImage_3.png

So you don't need to emulate UART protocol by GPIO!  

In addition, even if there is ARM - M0 core in PN7462,  it is only NFC reader with M0 core, you couldn't compare it with MCU on GPIO performance. 

Have a nice day!

Best Regards,

Weidong Sun

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276642088
Contributor II

pastedImage_1.png

Only one interface is active at a time.

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