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uart_read() can not read data and never returns

Hello,

发现HBird v1 SDK 的串口读是不是有些小 bug,我试了下 baremetal 里面:

/SoC/hbird/Common/Source/Drivers/hbird_uart.c
int main(void)
{
    while(1)
    {
    	uart_write(UART0, (uart_read(UART0)));
    	printf("Hi");
    }
}

串口读不到数据,并且一直卡死在 uart_read() 里无法返回,
论坛里也有不少同学碰到串口无法读数据的问题。

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