用库函数方式写个Stm32f103c8t6 写个程序PA0外部上拉，外部8M晶体，PA11为CAN RX,PA12为CAN TX ,当CAN RX CAN TX接收CAN数据，当接收到波特率为500K，帧ID为0XB4 数据为00 00 00 01 00 00 00 00时另外一个PA0输出低电平

好的，我理解了你的要求。以下是代码实现：

#include "stm32f10x.h"
#include "stm32f10x_can.h"
#include "stm32f10x_gpio.h"
#include "stm32f10x_rcc.h"

void GPIO_Configuration(void);
void CAN_Configuration(void);

int main(void)
{
    GPIO_Configuration();
    CAN_Configuration();

    while (1)
    {
    }
}

void GPIO_Configuration(void)
{
    GPIO_InitTypeDef GPIO_InitStructure;

    //使能GPIOA和AFIO时钟
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_AFIO, ENABLE);

    //PA0设置为推挽输出模式
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
    GPIO_Init(GPIOA, &GPIO_InitStructure);

    //PA11和PA12设置为复用推挽输出模式
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11 | GPIO_Pin_12;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
    GPIO_Init(GPIOA, &GPIO_InitStructure);
}

void CAN_Configuration(void)
{
    CAN_InitTypeDef CAN_InitStructure;
    CAN_FilterInitTypeDef CAN_FilterInitStructure;
    NVIC_InitTypeDef NVIC_InitStructure;

    //使能CAN和GPIOB时钟
    RCC_APB1PeriphClockCmd(RCC_APB1Periph_CAN1, ENABLE);
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);

    //配置CAN TX和RX引脚
    GPIO_PinRemapConfig(GPIO_Remap1_CAN1, ENABLE);
    
    //配置CAN外设
    CAN_InitStructure.CAN_TTCM = DISABLE;
    CAN_InitStructure.CAN_ABOM = DISABLE;
    CAN_InitStructure.CAN_AWUM = DISABLE;
    CAN_InitStructure.CAN_NART = DISABLE;
    CAN_InitStructure.CAN_RFLM = DISABLE;
    CAN_InitStructure.CAN_TXFP = DISABLE;
    CAN_InitStructure.CAN_Mode = CAN_Mode_Normal;
    CAN_InitStructure.CAN_SJW = CAN_SJW_1tq;
    CAN_InitStructure.CAN_BS1 = CAN_BS1_9tq;
    CAN_InitStructure.CAN_BS2 = CAN_BS2_4tq;
    CAN_InitStructure.CAN_Prescaler = 4;
    CAN_Init(CAN1, &CAN_InitStructure);

    //配置CAN过滤器
    CAN_FilterInitStructure.CAN_FilterNumber = 0;
    CAN_FilterInitStructure.CAN_FilterMode = CAN_FilterMode_IdMask;
    CAN_FilterInitStructure.CAN_FilterScale = CAN_FilterScale_32bit;
    CAN_FilterInitStructure.CAN_FilterIdHigh = 0x0000;
    CAN_FilterInitStructure.CAN_FilterIdLow = 0x0000;
    CAN_FilterInitStructure.CAN_FilterMaskIdHigh = 0x0000;
    CAN_FilterInitStructure.CAN_FilterMaskIdLow = 0x0000;
    CAN_FilterInitStructure.CAN_FilterFIFOAssignment = CAN_Filter_FIFO0;
    CAN_FilterInitStructure.CAN_FilterActivation = ENABLE;
    CAN_FilterInit(&CAN_FilterInitStructure);

    //配置CAN中断
    NVIC_InitStructure.NVIC_IRQChannel = USB_LP_CAN1_RX0_IRQn;
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
    NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init(&NVIC_InitStructure);

    //使能CAN接收中断
    CAN_ITConfig(CAN1, CAN_IT_FMP0, ENABLE);
}

void USB_LP_CAN1_RX0_IRQHandler(void)
{
    CanRxMsg RxMessage;

    //接收CAN数据
    CAN_Receive(CAN1, CAN_FIFO0, &RxMessage);

    //判断CAN数据是否符合要求
    if (RxMessage.ExtId == 0xB4 && RxMessage.DLC == 8 && RxMessage.Data[0] == 0x00 && RxMessage.Data[1] == 0x00 && RxMessage.Data[2] == 0x00 && RxMessage.Data[3] == 0x01 && RxMessage.Data[4] == 0x00 && RxMessage.Data[5] == 0x00 && RxMessage.Data[6] == 0x00 && RxMessage.Data[7] == 0x00)
    {
        GPIO_ResetBits(GPIOA, GPIO_Pin_0); //输出低电平
    }
}

注：以上代码是基于HAL库实现的。可以根据需要进行修改。