用固件库函数方式写个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，以下是代码实现：

#include "stm32f10x.h"
#include "stm32f10x_can.h"

#define CAN_RX_PIN	GPIO_Pin_11
#define CAN_TX_PIN	GPIO_Pin_12
#define CAN_PORT	GPIOA

void GPIO_Config(void);
void CAN_Config(void);

int main(void)
{
    GPIO_Config();      // 配置GPIO
    CAN_Config();       // 配置CAN

    while(1)
    {
    }
}

void GPIO_Config(void)
{
    GPIO_InitTypeDef GPIO_InitStructure;

    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);  // 使能GPIOA时钟

    // 将PA0配置为输出模式
    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);

    // 将PA11和PA12配置为复用推挽输出模式
    GPIO_InitStructure.GPIO_Pin = CAN_RX_PIN | CAN_TX_PIN;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
    GPIO_Init(CAN_PORT, &GPIO_InitStructure);

    // 将PA11配置为上拉输入模式
    GPIO_InitStructure.GPIO_Pin = CAN_RX_PIN;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
    GPIO_Init(CAN_PORT, &GPIO_InitStructure);
}

void CAN_Config(void)
{
    CAN_InitTypeDef CAN_InitStructure;
    CAN_FilterInitTypeDef CAN_FilterInitStructure;

    RCC_APB1PeriphClockCmd(RCC_APB1Periph_CAN1, ENABLE);  // 使能CAN1时钟

    CAN_DeInit(CAN1);   // 复位CAN1

    // CAN1初始化
    CAN_InitStructure.CAN_TTCM = DISABLE;
    CAN_InitStructure.CAN_ABOM = DISABLE;
    CAN_InitStructure.CAN_AWUM = DISABLE;
    CAN_InitStructure.CAN_NART = ENABLE;
    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_6tq;
    CAN_InitStructure.CAN_BS2 = CAN_BS2_8tq;
    CAN_InitStructure.CAN_Prescaler = 4;
    CAN_Init(CAN1, &CAN_InitStructure);

    // CAN过滤器初始化
    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 = 0;
    CAN_FilterInitStructure.CAN_FilterActivation = ENABLE;
    CAN_FilterInit(&CAN_FilterInitStructure);

    // CAN接收中断使能
    CAN_ITConfig(CAN1, CAN_IT_FMP0, ENABLE);
    NVIC_EnableIRQ(CAN1_RX0_IRQn);
}

void CAN1_RX0_IRQHandler(void)
{
    CanRxMsg RxMessage;

    // 接收到CAN数据
    if(CAN_GetITStatus(CAN1, CAN_IT_FMP0) != RESET)
    {
        CAN_ClearITPendingBit(CAN1, CAN_IT_FMP0);

        // 获取接收到的CAN数据
        CAN_Receive(CAN1, CAN_FIFO0, &RxMessage);

        // 判断波特率和帧ID是否符合要求
        if((RxMessage.StdId == 0xB4) && (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))
        {
            // 将PA0输出低电平
            GPIO_SetBits(GPIOA, GPIO_Pin_0);
        }
    }
}

以上代码实现了PA0的输出低电平功能，当CAN RX接收到波特率为500K，帧ID为0XB4，数据为00 00 00 01 00 00 00 00时触发。需要注意的是，由于PA11和PA12被配置为复用推挽输出模式，因此需要在初始化CAN之前将它们配置为该模式。同时，还需要在CAN接收中断中判断接收到的数据是否符合要求，符合要求才触发输出低电平的功能。