8-bit MicrocontrollersのトピックRe: UART and watchdog https://community.nxp.com/t5/8-bit-Microcontrollers/UART-and-watchdog/m-p/131775#M2830 <HTML><HEAD></HEAD><BODY>Right away I'd look at your receive routine. If you're using a polled routine, make sure it gets out on a regular basis to kick the watchdog. If it's an interrupt routine, then look for where it's hanging and not exiting.</BODY></HTML> Thu, 28 Sep 2006 22:38:24 GMT mke_et 2006-09-28T22:38:24Z UART and watchdog https://community.nxp.com/t5/8-bit-Microcontrollers/UART-and-watchdog/m-p/131774#M2829 <HTML><HEAD></HEAD><BODY><DIV>Hi everyone:</DIV><DIV>I´m using the SCI transmitter to send and receive data at 9600baud. With the transmission I have no problem but when I try to receive I get the next problem:</DIV><DIV>I send 3 bytes from the PC and the MC9s08AW resets because of the watchdog. Why this happens?</DIV><DIV>Thank you very much.</DIV><DIV>Best regards</DIV></BODY></HTML> Thu, 28 Sep 2006 22:32:11 GMT https://community.nxp.com/t5/8-bit-Microcontrollers/UART-and-watchdog/m-p/131774#M2829 FordFairlaneBen 2006-09-28T22:32:11Z Re: UART and watchdog https://community.nxp.com/t5/8-bit-Microcontrollers/UART-and-watchdog/m-p/131775#M2830 <HTML><HEAD></HEAD><BODY>Right away I'd look at your receive routine. If you're using a polled routine, make sure it gets out on a regular basis to kick the watchdog. If it's an interrupt routine, then look for where it's hanging and not exiting.</BODY></HTML> Thu, 28 Sep 2006 22:38:24 GMT https://community.nxp.com/t5/8-bit-Microcontrollers/UART-and-watchdog/m-p/131775#M2830 mke_et 2006-09-28T22:38:24Z Re: UART and watchdog https://community.nxp.com/t5/8-bit-Microcontrollers/UART-and-watchdog/m-p/131776#M2831 <HTML><HEAD></HEAD><BODY>Hi, Ford:<BR /><BR />In addition to what mke_et said, make sure you are clearing the interrupt flag, if you are using interrupts.<BR /><BR />Read the status register before reading the data register, or the interrupt flag will remain set, and you will loop through your ISR forever.</BODY></HTML> Fri, 29 Sep 2006 01:03:14 GMT https://community.nxp.com/t5/8-bit-Microcontrollers/UART-and-watchdog/m-p/131776#M2831 rocco 2006-09-29T01:03:14Z