topic Re: Can NOT write in UART0 data register D in Kinetis Microcontrollers https://community.nxp.com/t5/Kinetis-Microcontrollers/Can-NOT-write-in-UART0-data-register-D/m-p/985120#M55532 <HTML><HEAD></HEAD><BODY><P>In addition, if you'd like to be able to better manage those values. You can create a buffer, that stores the values being read from this register.</P><P>Then compare your buffers to confirm if the data is being written correctly.</P><P>Best Regards,</P><P>Sabina</P></BODY></HTML> Mon, 13 Jan 2020 18:22:24 GMT Sabina_Bruce 2020-01-13T18:22:24Z Can NOT write in UART0 data register D https://community.nxp.com/t5/Kinetis-Microcontrollers/Can-NOT-write-in-UART0-data-register-D/m-p/985118#M55530 <HTML><HEAD></HEAD><BODY><P>While trying to send data byte through UART0, an by writing this data byte to D register, the content of data register D doesn't change and always has a zero value 0x00. What is the problem here? There are a snapshots show that. Also TC and TDRE always set to 1.&nbsp;</P><P><span class="lia-inline-image-display-wrapper" image-alt="pp3.PNG"><img src="https://community.nxp.com/t5/image/serverpage/image-id/101810i18CA505A1AE85EC7/image-size/large?v=v2&amp;px=999" role="button" title="pp3.PNG" alt="pp3.PNG" /></span><span class="lia-inline-image-display-wrapper" image-alt="pp3.1.PNG"><img src="https://community.nxp.com/t5/image/serverpage/image-id/101820iF86B23370105183C/image-size/large?v=v2&amp;px=999" role="button" title="pp3.1.PNG" alt="pp3.1.PNG" /></span></P></BODY></HTML> Wed, 08 Jan 2020 10:54:42 GMT https://community.nxp.com/t5/Kinetis-Microcontrollers/Can-NOT-write-in-UART0-data-register-D/m-p/985118#M55530 muhammedhafez98 2020-01-08T10:54:42Z Re: Can NOT write in UART0 data register D https://community.nxp.com/t5/Kinetis-Microcontrollers/Can-NOT-write-in-UART0-data-register-D/m-p/985119#M55531 <HTML><HEAD></HEAD><BODY><P>Hi</P><P></P><P>The data register is used to write data to that is to be sent and read data that is received. That is, unless you have a loop-back where the data your send is received, you won't see the value that was written (you will see the last data that was received).</P><P></P><P>You should however see the written data being sent out on the Tx pin.</P><P></P><P>Regards</P><P></P><P>Mark<BR />(uTasker project developer for Kinetis and i.MX RT)</P></BODY></HTML> Thu, 09 Jan 2020 00:25:15 GMT https://community.nxp.com/t5/Kinetis-Microcontrollers/Can-NOT-write-in-UART0-data-register-D/m-p/985119#M55531 mjbcswitzerland 2020-01-09T00:25:15Z Re: Can NOT write in UART0 data register D https://community.nxp.com/t5/Kinetis-Microcontrollers/Can-NOT-write-in-UART0-data-register-D/m-p/985120#M55532 <HTML><HEAD></HEAD><BODY><P>In addition, if you'd like to be able to better manage those values. You can create a buffer, that stores the values being read from this register.</P><P>Then compare your buffers to confirm if the data is being written correctly.</P><P>Best Regards,</P><P>Sabina</P></BODY></HTML> Mon, 13 Jan 2020 18:22:24 GMT https://community.nxp.com/t5/Kinetis-Microcontrollers/Can-NOT-write-in-UART0-data-register-D/m-p/985120#M55532 Sabina_Bruce 2020-01-13T18:22:24Z