topic Re: im keep getting ARM_USART_EVENT_RX_OVERFLOW error what should i do? in LPC Microcontrollers https://community.nxp.com/t5/LPC-Microcontrollers/im-keep-getting-ARM-USART-EVENT-RX-OVERFLOW-error-what-should-i/m-p/671099#M26839 <HTML><HEAD></HEAD><BODY><P>Hello navid ansari,</P><P>&nbsp; 1. error&nbsp;ARM_USART_EVENT_RX_OVERFLOW</P><P>&nbsp;&nbsp;&nbsp; I don't know what the code you are using?</P><P>&nbsp;&nbsp; If you get the error&nbsp;ARM_USART_EVENT_RX_OVERFLOW, from the name, it should be caused by you didn't read the RX buff, then the new data come in again, it caused the problem.</P><P>But for the details, I need to check your code.</P><P>&nbsp;&nbsp; 2. can ADM485 5v output to MCU be cause of problem?</P><P>&nbsp;&nbsp; From the datasheet, we can get that, the max input voltage is 5V.</P><P><span class="lia-inline-image-display-wrapper" image-alt="pastedImage_1.png"><img src="https://community.nxp.com/t5/image/serverpage/image-id/25485iE0FD7EE30E772DF3/image-size/large?v=v2&amp;px=999" role="button" title="pastedImage_1.png" alt="pastedImage_1.png" /></span></P><P>&nbsp;&nbsp; So, you need to check your output voltage to the MCU, whether it is higher than 5V, because 5V already the max data.</P><P></P><P>&nbsp; 3. 485 code</P><P>&nbsp;&nbsp; Just as what I have replied you in your another post, you can refer to the sample code which I shared with you.</P><P><A href="https://community.nxp.com/thread/455827">how to clear buffer in usart1 lpc1768?</A>&nbsp;</P><P></P><P></P><P>&nbsp; Wish it helps you!</P><P><BR />Have a great day,<BR />Kerry</P><P></P><P>-----------------------------------------------------------------------------------------------------------------------<BR />Note: If this post answers your question, please click the Correct Answer button. Thank you!<BR />-----------------------------------------------------------------------------------------------------------------------</P></BODY></HTML> Tue, 18 Jul 2017 06:15:21 GMT kerryzhou 2017-07-18T06:15:21Z im keep getting ARM_USART_EVENT_RX_OVERFLOW error what should i do? https://community.nxp.com/t5/LPC-Microcontrollers/im-keep-getting-ARM-USART-EVENT-RX-OVERFLOW-error-what-should-i/m-p/671098#M26838 <HTML><HEAD></HEAD><BODY><P>hi</P><P>there is a board that use stm32f0 that sending data via rs485 and i have a board that use lpc1768 that use adm485 as rs485 ic</P><P>every 400 ms stm board send me a few byte information and i see it in oscope but in lpc1768 i keep getting this error&nbsp;ARM_USART_EVENT_RX_OVERFLOW</P><P>why is that?</P><P>can ADM485 5v output to MCU be cause of problem?</P><P>what do u think?</P></BODY></HTML> Sun, 16 Jul 2017 04:49:11 GMT https://community.nxp.com/t5/LPC-Microcontrollers/im-keep-getting-ARM-USART-EVENT-RX-OVERFLOW-error-what-should-i/m-p/671098#M26838 navidansari 2017-07-16T04:49:11Z Re: im keep getting ARM_USART_EVENT_RX_OVERFLOW error what should i do? https://community.nxp.com/t5/LPC-Microcontrollers/im-keep-getting-ARM-USART-EVENT-RX-OVERFLOW-error-what-should-i/m-p/671099#M26839 <HTML><HEAD></HEAD><BODY><P>Hello navid ansari,</P><P>&nbsp; 1. error&nbsp;ARM_USART_EVENT_RX_OVERFLOW</P><P>&nbsp;&nbsp;&nbsp; I don't know what the code you are using?</P><P>&nbsp;&nbsp; If you get the error&nbsp;ARM_USART_EVENT_RX_OVERFLOW, from the name, it should be caused by you didn't read the RX buff, then the new data come in again, it caused the problem.</P><P>But for the details, I need to check your code.</P><P>&nbsp;&nbsp; 2. can ADM485 5v output to MCU be cause of problem?</P><P>&nbsp;&nbsp; From the datasheet, we can get that, the max input voltage is 5V.</P><P><span class="lia-inline-image-display-wrapper" image-alt="pastedImage_1.png"><img src="https://community.nxp.com/t5/image/serverpage/image-id/25485iE0FD7EE30E772DF3/image-size/large?v=v2&amp;px=999" role="button" title="pastedImage_1.png" alt="pastedImage_1.png" /></span></P><P>&nbsp;&nbsp; So, you need to check your output voltage to the MCU, whether it is higher than 5V, because 5V already the max data.</P><P></P><P>&nbsp; 3. 485 code</P><P>&nbsp;&nbsp; Just as what I have replied you in your another post, you can refer to the sample code which I shared with you.</P><P><A href="https://community.nxp.com/thread/455827">how to clear buffer in usart1 lpc1768?</A>&nbsp;</P><P></P><P></P><P>&nbsp; Wish it helps you!</P><P><BR />Have a great day,<BR />Kerry</P><P></P><P>-----------------------------------------------------------------------------------------------------------------------<BR />Note: If this post answers your question, please click the Correct Answer button. Thank you!<BR />-----------------------------------------------------------------------------------------------------------------------</P></BODY></HTML> Tue, 18 Jul 2017 06:15:21 GMT https://community.nxp.com/t5/LPC-Microcontrollers/im-keep-getting-ARM-USART-EVENT-RX-OVERFLOW-error-what-should-i/m-p/671099#M26839 kerryzhou 2017-07-18T06:15:21Z Re: im keep getting ARM_USART_EVENT_RX_OVERFLOW error what should i do? https://community.nxp.com/t5/LPC-Microcontrollers/im-keep-getting-ARM-USART-EVENT-RX-OVERFLOW-error-what-should-i/m-p/671100#M26840 <HTML><HEAD></HEAD><BODY><P>thanks that was problem&nbsp;</P></BODY></HTML> Sun, 30 Jul 2017 05:11:29 GMT https://community.nxp.com/t5/LPC-Microcontrollers/im-keep-getting-ARM-USART-EVENT-RX-OVERFLOW-error-what-should-i/m-p/671100#M26840 navidansari 2017-07-30T05:11:29Z