# \#uart

**URL:** https://forum.amebaiot.com/tag/uart/64.md

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## [Uart in Half Duplex](https://forum.amebaiot.com/t/uart-in-half-duplex/1765)

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**Author:** [@Robert\_Jaszczyk](https://forum.amebaiot.com/u/Robert_Jaszczyk)\
**Replies:** 2\
**Last updated:** [March 23, 2023, 12:58pm UTC](https://forum.amebaiot.com/t/uart-in-half-duplex/1765 "2023-03-23T12:58:49Z")

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Hi guys, some of the MCUs provide uart in half duplex mode. Is that a case for Ameba Pro 2? Cant find a way to do so using SDK, but maybe some hidden MCU registers can handle it by using only single pin of the module? …

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## [km4的UART0有没有Rx空闲中断](https://forum.amebaiot.com/t/km4-uart0-rx/1698)

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**Author:** [@oxygenben](https://forum.amebaiot.com/u/oxygenben)\
**Replies:** 4\
**Last updated:** [February 21, 2023, 9:00am UTC](https://forum.amebaiot.com/t/km4-uart0-rx/1698 "2023-02-21T09:00:06Z")

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用的芯片是RTL8722DM，如果没有Rx空闲中断的话，如何判断一帧不定长的数据已经接收完？

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## [Does UART write slow?](https://forum.amebaiot.com/t/does-uart-write-slow/1585)

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**Author:** [@VedantLm10](https://forum.amebaiot.com/u/VedantLm10)\
**Replies:** 3\
**Last updated:** [December 14, 2022, 8:19am UTC](https://forum.amebaiot.com/t/does-uart-write-slow/1585 "2022-12-14T08:19:57Z")

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Hello, I am using rtl8721d chip with ambd\_sdk. For UART functionality I am using serial\_send\_stream() function, there is a functionality where I need to send 512 chunks repetitively for 200 times for OTA, where I am obs…

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## [RTL8720DN AT firmware issue](https://forum.amebaiot.com/t/rtl8720dn-at-firmware-issue/1587)

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**Author:** [@Zhou](https://forum.amebaiot.com/u/Zhou)\
**Replies:** 1\
**Last updated:** [December 12, 2022, 3:46am UTC](https://forum.amebaiot.com/t/rtl8720dn-at-firmware-issue/1587 "2022-12-12T03:46:53Z")

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I am using RTL8720DN for a project and I am looking for an AT firmware that uses a serial port other than PB1 and PB2. Is there anyone who has experience with this and can help me out? Or perhaps provide me with the AT …

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## [RTL8722DM(AMB21) UART3 not working](https://forum.amebaiot.com/t/rtl8722dm-amb21-uart3-not-working/1348)

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**Author:** [@Po\_Quan\_Hsieh](https://forum.amebaiot.com/u/Po_Quan_Hsieh)\
**Replies:** 2\
**Last updated:** [July 15, 2022, 6:57am UTC](https://forum.amebaiot.com/t/rtl8722dm-amb21-uart3-not-working/1348 "2022-07-15T06:57:02Z")

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Hi, I started development with Standard SDK(which is downloaded GitHub) on AMB21 evaluation board. I referenced the uart\_stream\_data example(example\_sources\\UART\\mbed\\uart\_stream\_dma) and add in the main.c and it works…

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## [RTL8721CSM- Is it possible to configure UART\_LOG (PA\[7\],PA\[8\]) for other application use?](https://forum.amebaiot.com/t/rtl8721csm-is-it-possible-to-configure-uart-log-pa-7-pa-8-for-other-application-use/898)

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**Author:** [@avinashnp](https://forum.amebaiot.com/u/avinashnp)\
**Replies:** 4\
**Last updated:** [November 12, 2021, 6:56am UTC](https://forum.amebaiot.com/t/rtl8721csm-is-it-possible-to-configure-uart-log-pa-7-pa-8-for-other-application-use/898 "2021-11-12T06:56:50Z")

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Is it possible to disable the default UART\_LOG port and use it for other purpose? If so, is there an application note/ document explaining this?