串口1采用固定组引脚的配置方法PORTH_6_7中的IO_PORTH_06作为打印, IO_PORTH_07作为通信RX引脚
UART1_PLATFORM_DATA_BEGIN(uart1_data) .baudrate = 460800, .port = PORTH_6_7, .tx_pin = IO_PORTH_06 .rx_pin = IO_PORTH_07, .max_continue_recv_cnt = 1024, .idle_sys_clk_cnt = 500000, .clk_src = PLL_48M, .disable_tx_irq=1, .flags = UART_DEBUG, UART1_PLATFORM_DATA_END();