int main(void)
{
uint16_t i;
led_init();
systick_config();
nvic_irq_enable(USART0_IRQn, 0, 0);
gd_eval_com_init(EVAL_COM0);
gd_eval_com_init(EVAL_COM2);
usart_interrupt_enable(USART0, USART_INT_RBNE);
while(1){}
}
void gd_eval_com_init(uint32_t com)
{
uint32_t com_id = 0U;
if(EVAL_COM0 == com){
com_id = 0U;
}else if(EVAL_COM1 == com){
com_id = 1U;
}
else if(EVAL_COM2 == com){
com_id = 2U;
}
/* enable GPIO clock */
rcu_periph_clock_enable(COM_GPIO_CLK[com_id]);
/* enable USART clock */
rcu_periph_clock_enable(COM_CLK[com_id]);
/* connect port to USARTx_Tx */
gpio_init(COM_GPIO_PORT[com_id], GPIO_MODE_AF_PP, GPIO_OSPEED_50MHZ, COM_TX_PIN[com_id]);
/* connect port to USARTx_Rx */
gpio_init(COM_GPIO_PORT[com_id], GPIO_MODE_IN_FLOATING, GPIO_OSPEED_50MHZ, COM_RX_PIN[com_id]);
/* USART configure */
usart_deinit(com);
usart_baudrate_set(com, 9600U);
usart_word_length_set(com, USART_WL_8BIT);
usart_stop_bit_set(com, USART_STB_1BIT);
usart_parity_config(com, USART_PM_NONE);
usart_hardware_flow_rts_config(com, USART_RTS_DISABLE);
usart_hardware_flow_cts_config(com, USART_CTS_DISABLE);
usart_receive_config(com, USART_RECEIVE_ENABLE);
usart_transmit_config(com, USART_TRANSMIT_ENABLE);
usart_enable(com);
}
我串口0可以正常收发数据，但是用串口2没有反应
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