加好友 
發短信
Post By：2020-4-20 16:51:00 [只看該作者]
遇到問題啦， 求救！！！
1、板子上運行早先軟件，正常。該軟件始終運行不退出。
2、我編譯一個自己代碼，替換早先軟件。代碼很簡單：
#include <stdio.h>
int main(void)
{
pirintf("Hello! \n");
retuen 0;
}
3、替換后，啟動板子，串口工具Tera Term輸出看到打印“Hello！”。
4、再次斷電重新啟動，開始一些系統信息之后，就是連續不斷的如下信息（部分摘錄）：
[ 60.949352] imx-uart 2020000.serial: Rx FIFO overrun
[ 60.957137] imx-uart 2020000.serial: Rx FIFO overrun
[ 60.962167] imx-uart 2020000.serial: Rx FIFO overrun
** 1 printk messages dropped ** [ 60.993473] imx-uart 2020000.serial: Rx FIFO overrun
** 1 printk messages dropped ** [ 60.998564] imx-uart 2020000.serial: Rx FIFO overrun
** 1 printk messages dropped ** [ 61.037600] imx-uart 2020000.serial: Rx FIFO overrun
** 2 printk messages dropped ** [ 61.073926] imx-uart 2020000.serial: Rx FIFO overrun
[ 61.078976] imx-uart 2020000.serial: Rx FIFO overrun
** 1 printk messages dropped ** [ 61.084029] imx-uart 2020000.serial: Rx FIFO overrun
** 2 printk messages dropped ** [ 61.125349] sysrq: SysRq : HELP : loglevel(0-9) reboot(b) crash(c) terminate-all-tasks(e) memory-full-oom-kill(f) kill-all-tasks(i) thaw-filesystems(j) sak(k) show-backtrace-all-active-cpus(l) show-memory-usage(m) nice-all-RT-tasks(n) poweroff(o) show-registers(p) show-all-timers(q) unraw(r) sync(s) show-task-states(t) unmount(u) show-blocked-tasks(w)
** 1 printk messages dropped ** [ 61.133180] imx-uart 2020000.serial: Rx FIFO overrun
** 2 printk messages dropped ** [ 61.169507] imx-uart 2020000.serial: Rx FIFO overrun
[ 61.174526] sysrq: SysRq : HELP : loglevel(0-9) reboot(b) crash(c) terminate-all-tasks(e) memory-full-oom-kill(f) kill-all-tasks(i) thaw-filesystems(j) sak(k) show-backtrace-all-active-cpus(l) show-memory-usage(m) nice-all-RT-tasks(n) poweroff(o) show-registers(p) show-all-timers(q) unraw(r) sync(s) show-task-states(t) unmount(u) show-blocked-tasks(w)
[ 61.174560] imx-uart 2020000.serial: Rx FIFO overrun
[ 61.182394] sysrq: SysRq : HELP : loglevel(0-9) reboot(b) crash(c) terminate-all-tasks(e) memory-full-oom-kill(f) kill-all-tasks(i) thaw-filesystems(j) sak(k) show-backtrace-all-active-cpus(l) show-memory-usage(m) nice-all-RT-tasks(n) poweroff(o) show-registers(p) show-all-timers(q) unraw(r) sync(s) show-task-states(t) unmount(u) show-blocked-tasks(w)
[ 61.182429] imx-uart 2020000.serial: Rx FIFO overrun
** 1 printk messages dropped ** [ 61.216509] imx-uart 2020000.serial: Rx FIFO overrun
[ 61.250559] sysrq: SysRq : HELP : loglevel(0-9) reboot(b) crash(c) terminate-all-tasks(e) memory-full-oom-kill(f) kill-all-tasks(i) thaw-filesystems(j) sak(k) show-backtrace-all-active-cpus(l) show-memory-usage(m) nice-all-RT-tasks(n) poweroff(o) show-registers(p) show-all-timers(q) unraw(r) sync(s) show-task-states(t) unmount(u) show-blocked-tasks(w)
[ 61.250593] imx-uart 2020000.serial: Rx FIFO overrun
** 2 printk messages dropped ** [ 61.294693] sysrq: SysRq : HELP : loglevel(0-9) reboot(b) crash(c) terminate-all-tasks(e) memory-full-oom-kill(f) kill-all-tasks(i) thaw-filesystems(j) sak(k) show-backtrace-all-active-cpus(l) show-memory-usage(m) nice-all-RT-tasks(n) poweroff(o) show-registers(p) show-all-timers(q) unraw(r) sync(s) show-task-states(t) unmount(u) show-blocked-tasks(w)
** 1 printk messages dropped ** [ 61.302542] imx-uart 2020000.serial: Rx FIFO overrun
** 1 printk messages dropped ** [ 61.333838] imx-uart 2020000.serial: Rx FIFO overrun
** 1 printk messages dropped ** [ 61.338923] imx-uart 2020000.serial: Rx FIFO overrun
[ 61.346722] sysrq: SysRq : HELP : loglevel(0-9) reboot(b) crash(c) terminate-all-tasks(e) memory-full-oom-kill(f) kill-all-tasks(i) thaw-filesystems(j) sak(k) show-backtrace-all-active-cpus(l) show-memory-usage(m) nice-all-RT-tasks(n) poweroff(o) show-registers(p) show-all-timers(q) unraw(r) sync(s) show-task-states(t) unmount(u) show-blocked-tasks(w)
[ 61.346758] imx-uart 2020000.serial: Rx FIFO overrun
** 1 printk messages dropped ** [ 61.385815] imx-uart 2020000.serial: Rx FIFO overrun
** 1 printk messages dropped ** [ 61.390886] imx-uart 2020000.serial: Rx FIFO overrun
[ 61.424919] imx-uart 2020000.serial: Rx FIFO overrun
[ 61.456189] sysrq: SysRq : HELP : loglevel(0-9) reboot(b) crash(c) terminate-all-tasks(e) memory-full-oom-kill(f) kill-all-tasks(i) thaw-filesystems(j) sak(k) show-backtrace-all-active-cpus(l) show-memory-usage(m) nice-all-RT-tasks(n) poweroff(o) show-registers(p) show-all-timers(q) unraw(r) sync(s) show-task-states(t) unmount(u) show-blocked-tasks(w)
** 1 printk messages dropped ** [ 61.461276] sysrq: SysRq : HELP : loglevel(0-9) reboot(b) crash(c) terminate-all-tasks(e) memory-full-oom-kill(f) kill-all-tasks(i) thaw-filesystems(j) sak(k) show-backtrace-all-active-cpus(l) show-memory-usage(m) nice-all-RT-tasks(n) poweroff(o) show-registers(p) show-all-timers(q) unraw(r) sync(s) show-task-states(t) unmount(u) show-blocked-tasks(w)
[ 61.461313] imx-uart 2020000.serial: Rx FIFO overrun
** 1 printk messages dropped ** [ 61.469176] imx-uart 2020000.serial: Rx FIFO overrun
[ 61.476962] imx-uart 2020000.serial: Rx FIFO overrun
** 1 printk messages dropped ** [ 61.487037] sysrq: SysRq : HELP : loglevel(0-9) reboot(b) crash(c) terminate-all-tasks(e) memory-full-oom-kill(f) kill-all-tasks(i) thaw-filesystems(j) sak(k) show-backtrace-all-active-cpus(l) show-memory-usage(m) nice-all-RT-tasks(n) poweroff(o) show-registers(p) show-all-timers(q) unraw(r) sync(s) show-task-states(t) unmount(u) show-blocked-tasks(w)
[ 61.487072] imx-uart 2020000.serial: Rx FIFO overrun
