生成一段代码，实现stm32f030开发板接收通过485协议传输过来的信号并显示在0.9寸的oled液晶显示屏上

好的，这是一个简单的代码示例，可以实现您的需求。请注意，这只是一个示例，您需要根据自己的实际情况进行调整和修改。

#include <stdio.h>
#include <string.h>
#include "stm32f0xx.h"
#include "stm32f0xx_usart.h"
#include "stm32f0xx_gpio.h"
#include "stm32f0xx_rcc.h"
#include "ssd1306.h"

#define BUFFER_SIZE 100

char buffer[BUFFER_SIZE];
int buffer_pos = 0;

void USART1_IRQHandler(void)
{
    if (USART_GetITStatus(USART1, USART_IT_RXNE) != RESET)
    {
        char c = USART_ReceiveData(USART1);
        if (buffer_pos < BUFFER_SIZE - 1)
        {
            buffer[buffer_pos++] = c;
        }
    }
}

void init_usart(void)
{
    GPIO_InitTypeDef GPIO_InitStructure;
    USART_InitTypeDef USART_InitStructure;
    NVIC_InitTypeDef NVIC_InitStructure;

    RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE);
    RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA, ENABLE);

    GPIO_PinAFConfig(GPIOA, GPIO_PinSource9, GPIO_AF_1);
    GPIO_PinAFConfig(GPIOA, GPIO_PinSource10, GPIO_AF_1);

    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9 | GPIO_Pin_10;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
    GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
    GPIO_Init(GPIOA, &GPIO_InitStructure);

    USART_InitStructure.USART_BaudRate = 9600;
    USART_InitStructure.USART_WordLength = USART_WordLength_8b;
    USART_InitStructure.USART_StopBits = USART_StopBits_1;
    USART_InitStructure.USART_Parity = USART_Parity_No;
    USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
    USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
    USART_Init(USART1, &USART_InitStructure);

    NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;
    NVIC_InitStructure.NVIC_IRQChannelPriority = 0;
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init(&NVIC_InitStructure);

    USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);

    USART_Cmd(USART1, ENABLE);
}

void init_display(void)
{
    ssd1306_init();
    ssd1306_clear_display();
    ssd1306_display_on();
}

int main(void)
{
    init_usart();
    init_display();

    while (1)
    {
        if (buffer_pos > 0)
        {
            buffer[buffer_pos] = '\0';
            ssd1306_clear_display();
            ssd1306_draw_string(0, 0, buffer);
            ssd1306_refresh();
            buffer_pos = 0;
        }
    }
}

这个代码使用了USART1接收485协议传输的数据，并将其显示在0.9寸的OLED液晶屏上。您需要在代码中进行适当的修改，以适应您的具体情况，例如更改波特率、更改串口引脚等。