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我已经成功esp8266的串口一作为日志打印，《linkkitapp》竟然还会有部分数据日志打印？？ #569

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xuhongv opened this issue Sep 12, 2018 · 6 comments
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我已经成功esp8266的串口一作为日志打印，《linkkitapp》竟然还会有部分数据日志打印？？ #569

xuhongv opened this issue Sep 12, 2018 · 6 comments

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@xuhongv
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xuhongv commented Sep 12, 2018

bug描述：不断打印 chan1 `chan2的bug，而其他调用printf()则不会，我怎么屏蔽这个不断打印？我把 uart1 作为日志打印，竟然还会打印，过了三分钟之后，就不会打印了，奇怪。。。这边项目需要的是串口通讯。。。。紧急。。。

环境：

  1. branch(version): commit e8cb9ec (HEAD -> master, origin/master, origin/HEAD)

  2. Desktop OS(windows linux or macOS): Ubuntu

  3. example: 《linkkitapp》

串口打印

chan 6
chan 9
chan 11
chan 12
chan 1
chan 6
chan 11
chan 1
chan 2
chan 3
chan 4
chan 5
chan 6
chan 7
chan 8
chan 9
chan 10
chan 11
chan 12
chan 13
chan 1
chan 2
chan 6
chan 9
chan 11
chan 12
chan 1
chan 6
chan 11
chan 1
chan 2
chan 3
chan 4
chan 5
chan 6
chan 7
chan 8
chan 9
@librae8226
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是 framework/ywss4linkkit/lib/xtensa/esp8266/ywss4linkkit.a 这里面调用 HAL_Printf 打印出来的
可以跟一下你的代码里具体 HAL_Printf 是调用到哪个串口去了

@xuhongv
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xuhongv commented Sep 12, 2018

  • 最后发现了问题：不知道在哪里调用了 uart.c的 hal_uart_send()，我在源文件注释代码如下即可 去掉频繁打印了：
int32_t hal_uart_send(aos_uart_dev_t *uart, const void *data, uint32_t size, uint32_t timeout)
{
    int i = 0;
    char *pdata = (char *)data;

    for (i = 0; i < size; i++)
    {
        uart0_write_char(pdata[i]);
    }

    return 0;
}

@xuhongv
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xuhongv commented Sep 12, 2018

@librae8226 我把 8266 里面的 hal_uart_send() 去掉，发现报错了如下！存在2个方面原因，要么是：esp8266/libraries/newlib_stub.a 这个文件调用去掉，要么是utility/libc/newlib_stub.c去掉调用！

最后发现：

out/linkkitapp@esp8266/libraries/newlib_stub.a(newlib_stub.o):(.literal._write_r+0x8): undefined reference to `hal_uart_send'
out/linkkitapp@esp8266/libraries/newlib_stub.a(newlib_stub.o): In function `_write_r':
/media/sf_Alios_Esp8266/AliOS-Things/utility/libc/newlib_stub.c:80: undefined reference to `hal_uart_send'
/media/sf_Alios_Esp8266/AliOS-Things/utility/libc/newlib_stub.c:80: undefined reference to `hal_uart_send'

@xuhongv
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xuhongv commented Sep 12, 2018

  • 对于esp8266 有2个串口，分别是串口0和串口一，而串口一仅仅可以做收数据。所以我们一般用串口0作为与其他设备串口通讯的串口，而串口一作为打印系统日志；

  • 现在我已经成功地把系统日志打印到了串口一，只是把printf()打印到串口一，而通过串口0发送数据是调用 uart0_write_char() ;

  • 上面提到，我们只能通过uart0_write_char() 发送数据到其他设备，而 esp8266 适配层的 hal_uart_send() 是调用 uart0_write_char() 发送的！

  • 而此个 bug 反复出现 chan1 chan5，正是反复调用此函数。有什么办法可以不要发送，或者调用 printf() `打印。

@walker2048
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walker2048 commented Sep 13, 2018 •
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Linkitapp，调用了一键配网库，这里输出频道列表的，应该是一键配网那边的。目前暂时未开源。
你去修改newlib那边，治标不治本

@xuhongv
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xuhongv commented Sep 13, 2018

两边都不开源的。只能治标不治本如下修改：

int32_t hal_uart_send(aos_uart_dev_t *uart, const void *data, uint32_t size, uint32_t timeout)
{

    int i = 0;
    char *pdata = (char *)data;
    for (i = 0; i < size; i++)
    {
        if (uart->port == 1)
            uart0_write_char(pdata[i]);
        else
            uart1_write_char(pdata[i]);
    }

    return 0;
}

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@librae8226 @walker2048 @xuhongv @skylarCai