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【GD32F350开发分享六】USART0和USART1的双串口应用

已有 1673 次阅读2018-10-9 19:32 |个人分类:GD32系列学习

如图所示，GD32F350有两个串口，分别是USART0和USART1，分别是哪几个脚复用成串口，具体可以看手册。
我的GPIO复用配置如下

串口初始化函数为

void gd_eval_com_init(uint32_t com)
{
uint32_t COM_ID;
if(EVAL_COM1 == com){
COM_ID = 0U;
}else{
COM_ID = 1U;
}
/* enable COM GPIO clock */
rcu_periph_clock_enable(EVAL_COM_GPIO_CLK);
/* enable USART clock */
rcu_periph_clock_enable(COM_CLK[COM_ID]);
/* connect port to USARTx_Tx */
gpio_af_set(EVAL_COM_GPIO_PORT, EVAL_COM_AF, COM_TX_PIN[COM_ID]);
/* connect port to USARTx_Rx */
gpio_af_set(EVAL_COM_GPIO_PORT, EVAL_COM_AF, COM_RX_PIN[COM_ID]);
/* configure USART Tx as alternate function push-pull */
gpio_mode_set(EVAL_COM_GPIO_PORT, GPIO_MODE_AF, GPIO_PUPD_PULLUP, COM_TX_PIN[COM_ID]);
gpio_output_options_set(EVAL_COM_GPIO_PORT, GPIO_OTYPE_PP, GPIO_OSPEED_10MHZ, COM_TX_PIN[COM_ID]);
/* configure USART Rx as alternate function push-pull */
gpio_mode_set(EVAL_COM_GPIO_PORT, GPIO_MODE_AF, GPIO_PUPD_PULLUP, COM_RX_PIN[COM_ID]);
gpio_output_options_set(EVAL_COM_GPIO_PORT, GPIO_OTYPE_PP, GPIO_OSPEED_10MHZ, COM_RX_PIN[COM_ID]);
/* USART configure */
usart_deinit(com);
usart_baudrate_set(com, 115200U);
usart_receive_config(com, USART_RECEIVE_ENABLE);
usart_transmit_config(com, USART_TRANSMIT_ENABLE);
usart_enable(com);
}