stm32f030c8t6串口发送数据

可以使用以下代码：

#include "stm32f0xx.h"

void USART_Init(void)
{
    RCC->APB2ENR |= RCC_APB2ENR_USART1EN;    // Enable USART1 clock
    RCC->AHBENR |= RCC_AHBENR_GPIOAEN;      // Enable GPIOA clock

    GPIOA->MODER |= GPIO_MODER_MODER9_1;    // Configure PA9 as AF push-pull
    GPIOA->MODER |= GPIO_MODER_MODER10_1;   // Configure PA10 as AF push-pull
    GPIOA->AFR[1] |= 0x00000110;            // Select AF1 for PA9 and PA10

    USART1->BRR = SystemCoreClock / 9600;   // Set baud rate to 9600
    USART1->CR1 |= USART_CR1_TE;            // Enable transmitter
    USART1->CR1 |= USART_CR1_UE;            // Enable USART
}

void USART_SendChar(char ch)
{
    while (!(USART1->ISR & USART_ISR_TXE)); // Wait for TX buffer to be empty
    USART1->TDR = ch;                       // Load data into TX buffer  
}

void USART_SendString(char *str)
{
    while (*str)
    {
        USART_SendChar(*str++);
    }
}

int main(void)
{
    char *msg = "Hello, world!\r\n";
    
    USART_Init();
    
    while (1)
    {
        USART_SendString(msg);
    }
}

上面的代码演示了如何初始化STM32F030C8T6的USART1串口并使用它发送字符和字符串。通过修改USART_SendString()函数中的msg字符串，您可以发送不同的消息。请注意，代码使用9600波特率配置串口。如果您需要不同的波特率，请相应地更改代码中的USART1->BRR值。