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Merge pull request #3293 from rgw5267/fix_at 

fix the bug that rx_notice out of sync when data received after last rt_device_read() is zero
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Bernard Xiong 2020-12-31 08:34:57 +08:00 committed by GitHub
parent 5fd6aec3d1 27b7e0d929
commit 72bc0d8fad
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1 changed files with 12 additions and 10 deletions
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22
components/net/at/src/at_client.c
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@ -434,18 +434,20 @@ static rt_err_t at_client_getchar(at_client_t client, char *ch, rt_int32_t timeo
{
rt_err_t result = RT_EOK;
while (rt_device_read(client->device, 0, ch, 1) == 0)
__retry:
result = rt_sem_take(client->rx_notice, rt_tick_from_millisecond(timeout));
if (result != RT_EOK)
{
rt_sem_control(client->rx_notice, RT_IPC_CMD_RESET, RT_NULL);
result = rt_sem_take(client->rx_notice, rt_tick_from_millisecond(timeout));
if (result != RT_EOK)
{
return result;
}
return result;
}
if(rt_device_read(client->device, 0, ch, 1) == 1)
{
return RT_EOK;
}
else
{
goto __retry;
}
return RT_EOK;
}
/**