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rt-thread-official
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解决控制台无法输入bug 

rt_uint16_t old_flag = _console_device->open_flag;

        _console_device->open_flag |= RT_DEVICE_FLAG_STREAM;
        rt_device_write(_console_device, 0, str, rt_strlen(str));
        _console_device->open_flag = old_flag;

        当一个线程正在执行 rt_device_write(_console_device, 0, str, rt_strlen(str));函数时，一个高优先级线程
抢占当前线程并修改 _console_device->open_flag（修改为RT_DEVICE_FLAG_INT_RX，之前不是中断接收），
高优先级线程执行完后，继续执行以前线程，此时old_flag与_console_device->open_flag不一致，执行
_console_device->open_flag = old_flag;后_console_device->open_flag新的值被覆盖。控制台串口实际配置
成硬件中断接收，因为_console_device->open_flag值被修改为不是中断，最后导致控制台串口无法接收任何数据
输入。
This commit is contained in:
boxuesong 2022-08-18 15:41:39 +08:00 committed by Man, Jianting (Meco)
parent 92beddf3bc
commit caeea1f893
1 changed files with 2 additions and 2 deletions
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4
src/kservice.c
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@ -1175,7 +1175,7 @@ void rt_kputs(const char *str)
_console_device->open_flag |= RT_DEVICE_FLAG_STREAM; _console_device->open_flag |= RT_DEVICE_FLAG_STREAM;
rt_device_write(_console_device, 0, str, rt_strlen(str)); rt_device_write(_console_device, 0, str, rt_strlen(str));
_console_device->open_flag = old_flag; _console_device->open_flag ^= (~old_flag & RT_DEVICE_FLAG_STREAM);
} }
#else #else
rt_hw_console_output(str); rt_hw_console_output(str);
@ -1213,7 +1213,7 @@ void rt_kprintf(const char *fmt, ...)
_console_device->open_flag |= RT_DEVICE_FLAG_STREAM; _console_device->open_flag |= RT_DEVICE_FLAG_STREAM;
rt_device_write(_console_device, 0, rt_log_buf, length); rt_device_write(_console_device, 0, rt_log_buf, length);
_console_device->open_flag = old_flag; _console_device->open_flag ^= (~old_flag & RT_DEVICE_FLAG_STREAM);
} }
#else #else
rt_hw_console_output(rt_log_buf); rt_hw_console_output(rt_log_buf);