问答

[color=#444444][backcolor=rgb(242, 249, 253)][font=Tahoma, "][size=16px] 我在作用GD32F103RB时，LQFP64将串口0重映射到PB6,PB7时串口发送数据时无输出。用示波器测量IO口无波形。但是串口中断可以进去。[/size][/font][/backcolor][/color] [color=#444444][backcolor=rgb(242, 249, 253)][font=Tahoma, "][size=16px] PB6 - Remap: USART_RX[/size][/font][/backcolor][/color] [color=#444444][backcolor=rgb(242, 249, 253)][font=Tahoma, "][size=16px] PB7 - Remap: USART_TX[/size][/font][/backcolor][/color] [color=#444444][backcolor=rgb(242, 249, 253)][font=Tahoma, "][size=16px]//初始化程序如下：[/size][/font][/backcolor][/color] [color=#444444][backcolor=rgb(242, 249, 253)][font=Tahoma, "][size=16px]nvic_irq_enable(USART0_IRQn, 14, 0); //[/size][/font][/backcolor][/color] [color=#444444][backcolor=rgb(242, 249, 253)][font=Tahoma, "][size=16px]// remap uart0[/size][/font][/backcolor][/color] [color=#444444][backcolor=rgb(242, 249, 253)][font=Tahoma, "][size=16px]rcu_periph_clock_enable(RCU_AF); [/size][/font][/backcolor][/color] [color=#444444][backcolor=rgb(242, 249, 253)][font=Tahoma, "][size=16px]gpio_pin_remap_config(GPIO_USART0_REMAP,ENABLE);[/size][/font][/backcolor][/color] [color=#444444][backcolor=rgb(242, 249, 253)][font=Tahoma, "][size=16px]/* enable GPIO clock */[/size][/font][/backcolor][/color] [color=#444444][backcolor=rgb(242, 249, 253)][font=Tahoma, "][size=16px]rcu_periph_clock_enable( RCU_GPIOB); // clock already seted[/size][/font][/backcolor][/color] [color=#444444][backcolor=rgb(242, 249, 253)][font=Tahoma, "][size=16px]rcu_periph_clock_enable( RCU_GPIOB);[/size][/font][/backcolor][/color] [color=#444444][backcolor=rgb(242, 249, 253)][font=Tahoma, "][size=16px]/* connect port to USARTx_Tx */[/size][/font][/backcolor][/color] [color=#444444][backcolor=rgb(242, 249, 253)][font=Tahoma, "][size=16px]gpio_init(GPIOB, GPIO_MODE_OUT_OD, GPIO_OSPEED_2MHZ, GPIO_PIN_6);[/size][/font][/backcolor][/color] [color=#444444][backcolor=rgb(242, 249, 253)][font=Tahoma, "][size=16px]/* connect port to USARTx_Rx */[/size][/font][/backcolor][/color] [color=#444444][backcolor=rgb(242, 249, 253)][font=Tahoma, "][size=16px]gpio_init(GPIOB, GPIO_MODE_OUT_OD, GPIO_OSPEED_2MHZ, GPIO_PIN_7);[/size][/font][/backcolor][/color] [color=#444444][backcolor=rgb(242, 249, 253)][font=Tahoma, "][size=16px]/* enable USART clock */[/size][/font][/backcolor][/color] [color=#444444][backcolor=rgb(242, 249, 253)][font=Tahoma, "][size=16px]rcu_periph_clock_enable(RCU_USART0);[/size][/font][/backcolor][/color] [color=#444444][backcolor=rgb(242, 249, 253)][font=Tahoma, "][size=16px]/* USART configure */[/size][/font][/backcolor][/color] [color=#444444][backcolor=rgb(242, 249, 253)][font=Tahoma, "][size=16px]usart_deinit(USART0);[/size][/font][/backcolor][/color] [color=#444444][backcolor=rgb(242, 249, 253)][font=Tahoma, "][size=16px]usart_baudrate_set(USART0, 9600);[/size][/font][/backcolor][/color] [color=#444444][backcolor=rgb(242, 249, 253)][font=Tahoma, "][size=16px]usart_word_length_set(USART0, USART_WL_8BIT);[/size][/font][/backcolor][/color] [color=#444444][backcolor=rgb(242, 249, 253)][font=Tahoma, "][size=16px]usart_stop_bit_set(USART0, USART_STB_1BIT);[/size][/font][/backcolor][/color] [color=#444444][backcolor=rgb(242, 249, 253)][font=Tahoma, "][size=16px]usart_parity_config(USART0, USART_PM_NONE);[/size][/font][/backcolor][/color] [color=#444444][backcolor=rgb(242, 249, 253)][font=Tahoma, "][size=16px]usart_hardware_flow_rts_config(USART0, USART_RTS_DISABLE);[/size][/font][/backcolor][/color] [color=#444444][backcolor=rgb(242, 249, 253)][font=Tahoma, "][size=16px]usart_hardware_flow_cts_config(USART0, USART_CTS_DISABLE);[/size][/font][/backcolor][/color] [color=#444444][backcolor=rgb(242, 249, 253)][font=Tahoma, "][size=16px]usart_receive_config(USART0, USART_RECEIVE_ENABLE);[/size][/font][/backcolor][/color] [color=#444444][backcolor=rgb(242, 249, 253)][font=Tahoma, "][size=16px]usart_transmit_config(USART0, USART_TRANSMIT_ENABLE);[/size][/font][/backcolor][/color] [color=#444444][backcolor=rgb(242, 249, 253)][font=Tahoma, "][size=16px]usart_enable(USART0);[/size][/font][/backcolor][/color] [color=#444444][backcolor=rgb(242, 249, 253)][font=Tahoma, "][size=16px]// interrupt enable[/size][/font][/backcolor][/color] [color=#444444][backcolor=rgb(242, 249, 253)][font=Tahoma, "][size=16px]//usart_interrupt_enable(USART0, USART_INT_TBE);[/size][/font][/backcolor][/color]