STM32f105怎么用USB升级程序

\u5982\u4f55\u64cd\u4f5cSTM32F105\u7684\u4eceCAN

#include "can.h"
#include "led.h"
#include "delay.h"
#include "usart.h"
//////////////////////////////////////////////////////////////////////////////////
//\u672c\u7a0b\u5e8f\u53ea\u4f9b\u5b66\u4e60\u4f7f\u7528\uff0c\u672a\u7ecf\u4f5c\u8005\u8bb8\u53ef\uff0c\u4e0d\u5f97\u7528\u4e8e\u5176\u5b83\u4efb\u4f55\u7528\u9014
//ALIENTEK\u6218\u8230STM32\u5f00\u53d1\u677f
//CAN\u9a71\u52a8 \u4ee3\u7801
//\u6b63\u70b9\u539f\u5b50@ALIENTEK
//\u6280\u672f\u8bba\u575b:www.openedv.com
//\u4fee\u6539\u65e5\u671f:2012/9/11
//\u7248\u672c\uff1aV1.0
//\u7248\u6743\u6240\u6709\uff0c\u76d7\u7248\u5fc5\u7a76\u3002
//Copyright(C) \u5e7f\u5dde\u5e02\u661f\u7ffc\u7535\u5b50\u79d1\u6280\u6709\u9650\u516c\u53f8 2009-2019
//All rights reserved
//////////////////////////////////////////////////////////////////////////////////
//CAN\u521d\u59cb\u5316
//tsjw:\u91cd\u65b0\u540c\u6b65\u8df3\u8dc3\u65f6\u95f4\u5355\u5143.\u8303\u56f4:1~3; CAN_SJW_1tq CAN_SJW_2tq CAN_SJW_3tq CAN_SJW_4tq
//tbs2:\u65f6\u95f4\u6bb52\u7684\u65f6\u95f4\u5355\u5143.\u8303\u56f4:1~8;
//tbs1:\u65f6\u95f4\u6bb51\u7684\u65f6\u95f4\u5355\u5143.\u8303\u56f4:1~16; CAN_BS1_1tq ~CAN_BS1_16tq
//brp :\u6ce2\u7279\u7387\u5206\u9891\u5668.\u8303\u56f4:1~1024;(\u5b9e\u9645\u8981\u52a01,\u4e5f\u5c31\u662f1~1024) tq=(brp)*tpclk1
//\u6ce8\u610f\u4ee5\u4e0a\u53c2\u6570\u4efb\u4f55\u4e00\u4e2a\u90fd\u4e0d\u80fd\u8bbe\u4e3a0,\u5426\u5219\u4f1a\u4e71.
//\u6ce2\u7279\u7387=Fpclk1/((tsjw+tbs1+tbs2)*brp);
//mode:0,\u666e\u901a\u6a21\u5f0f;1,\u56de\u73af\u6a21\u5f0f;
//Fpclk1\u7684\u65f6\u949f\u5728\u521d\u59cb\u5316\u7684\u65f6\u5019\u8bbe\u7f6e\u4e3a36M,\u5982\u679c\u8bbe\u7f6eCAN_Normal_Init(1,8,7,5,1);
//\u5219\u6ce2\u7279\u7387\u4e3a:36M/((1+8+7)*5)=450Kbps
//\u8fd4\u56de\u503c:0,\u521d\u59cb\u5316OK;
// \u5176\u4ed6,\u521d\u59cb\u5316\u5931\u8d25;

///////////////////////////////////////////////////CAN1////////////////////////////////////////////////////
u8 CAN_Mode_Init(u8 tsjw,u8 tbs2,u8 tbs1,u16 brp,u8 mode)
{

GPIO_InitTypeDef GPIO_InitStructure;
CAN_InitTypeDef CAN_InitStructure;
CAN_FilterInitTypeDef CAN_FilterInitStructure;
#if CAN_RX0_INT_ENABLE
NVIC_InitTypeDef NVIC_InitStructure;
#endif

RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA|RCC_APB2Periph_AFIO, ENABLE);//\u4f7f\u80fdPORTD\u65f6\u949f,\u4f7f\u80fd\u529f\u80fd\u590d\u7528\u65f6\u949f

RCC_APB1PeriphClockCmd(RCC_APB1Periph_CAN1, ENABLE);//\u4f7f\u80fdCAN1\u65f6\u949f

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; //\u590d\u7528\u63a8\u633d
GPIO_Init(GPIOA, &GPIO_InitStructure); //\u521d\u59cb\u5316IO

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;//\u4e0a\u62c9\u8f93\u5165
GPIO_Init(GPIOA, &GPIO_InitStructure);//\u521d\u59cb\u5316IO

//GPIO_PinRemapConfig(GPIO_Remap2_CAN1,ENABLE);

//CAN\u5355\u5143\u8bbe\u7f6e
CAN_InitStructure.CAN_TTCM=DISABLE; //\u975e\u65f6\u95f4\u89e6\u53d1\u901a\u4fe1\u6a21\u5f0f //
CAN_InitStructure.CAN_ABOM=DISABLE; //\u8f6f\u4ef6\u81ea\u52a8\u79bb\u7ebf\u7ba1\u7406 //
CAN_InitStructure.CAN_AWUM=DISABLE; //\u7761\u7720\u6a21\u5f0f\u901a\u8fc7\u8f6f\u4ef6\u5524\u9192(\u6e05\u9664CAN->MCR\u7684SLEEP\u4f4d)//
CAN_InitStructure.CAN_NART=ENABLE; //\u7981\u6b62\u62a5\u6587\u81ea\u52a8\u4f20\u9001 //
CAN_InitStructure.CAN_RFLM=DISABLE; //\u62a5\u6587\u4e0d\u9501\u5b9a,\u65b0\u7684\u8986\u76d6\u65e7\u7684 //
CAN_InitStructure.CAN_TXFP=DISABLE; //\u4f18\u5148\u7ea7\u7531\u62a5\u6587\u6807\u8bc6\u7b26\u51b3\u5b9a //
CAN_InitStructure.CAN_Mode= mode; //\u6a21\u5f0f\u8bbe\u7f6e\uff1a mode:0,\u666e\u901a\u6a21\u5f0f;1,\u56de\u73af\u6a21\u5f0f; //
//\u8bbe\u7f6e\u6ce2\u7279\u7387
CAN_InitStructure.CAN_SJW=tsjw; //\u91cd\u65b0\u540c\u6b65\u8df3\u8dc3\u5bbd\u5ea6(Tsjw)\u4e3atsjw+1\u4e2a\u65f6\u95f4\u5355\u4f4d CAN_SJW_1tq CAN_SJW_2tq CAN_SJW_3tq CAN_SJW_4tq
CAN_InitStructure.CAN_BS1=tbs1; //Tbs1=tbs1+1\u4e2a\u65f6\u95f4\u5355\u4f4dCAN_BS1_1tq ~CAN_BS1_16tq
CAN_InitStructure.CAN_BS2=tbs2;//Tbs2=tbs2+1\u4e2a\u65f6\u95f4\u5355\u4f4dCAN_BS2_1tq ~ CAN_BS2_8tq
CAN_InitStructure.CAN_Prescaler=brp; //\u5206\u9891\u7cfb\u6570(Fdiv)\u4e3abrp+1 //
CAN_Init(CAN1, &CAN_InitStructure); // \u521d\u59cb\u5316CAN1

CAN_FilterInitStructure.CAN_FilterNumber=0; //\u8fc7\u6ee4\u56680
CAN_FilterInitStructure.CAN_FilterMode=CAN_FilterMode_IdMask;
CAN_FilterInitStructure.CAN_FilterScale=CAN_FilterScale_32bit; //32\u4f4d
CAN_FilterInitStructure.CAN_FilterIdHigh=0x0000;////32\u4f4dID
CAN_FilterInitStructure.CAN_FilterIdLow=0x0000;
CAN_FilterInitStructure.CAN_FilterMaskIdHigh=0x0000;//32\u4f4dMASK
CAN_FilterInitStructure.CAN_FilterMaskIdLow=0x0000;
CAN_FilterInitStructure.CAN_FilterFIFOAssignment=CAN_Filter_FIFO0;//\u8fc7\u6ee4\u56680\u5173\u8054\u5230FIFO0
CAN_FilterInitStructure.CAN_FilterActivation=ENABLE; //\u6fc0\u6d3b\u8fc7\u6ee4\u56680

CAN_FilterInit(&CAN_FilterInitStructure);//\u6ee4\u6ce2\u5668\u521d\u59cb\u5316
#if CAN_RX0_INT_ENABLE

CAN_ITConfig(CAN1,CAN_IT_FMP0,ENABLE);//FIFO0\u6d88\u606f\u6302\u53f7\u4e2d\u65ad\u5141\u8bb8.

NVIC_InitStructure.NVIC_IRQChannel = CAN1_RX0_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1; // \u4e3b\u4f18\u5148\u7ea7\u4e3a1
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0; // \u6b21\u4f18\u5148\u7ea7\u4e3a0
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
#endif
return 0;
}

#if CAN_RX0_INT_ENABLE //\u4f7f\u80fdRX0\u4e2d\u65ad
//\u4e2d\u65ad\u670d\u52a1\u51fd\u6570
void CAN1_RX0_IRQHandler(void)
{
CanRxMsg RxMessage;
int i=0;
CAN_Receive(CAN1, 0, &RxMessage);
Can_Send_Msg(RxMessage.Data,8);
}
#endif

//can\u53d1\u9001\u4e00\u7ec4\u6570\u636e(\u56fa\u5b9a\u683c\u5f0f:ID\u4e3a0X12,\u6807\u51c6\u5e27,\u6570\u636e\u5e27)
//len:\u6570\u636e\u957f\u5ea6(\u6700\u5927\u4e3a8)
//msg:\u6570\u636e\u6307\u9488,\u6700\u5927\u4e3a8\u4e2a\u5b57\u8282.
//\u8fd4\u56de\u503c:0,\u6210\u529f;
// \u5176\u4ed6,\u5931\u8d25;
u8 Can_Send_Msg(u8* msg,u8 len)
{
u8 mbox;
u16 i=0;
CanTxMsg TxMessage;
TxMessage.StdId=0x12; // \u6807\u51c6\u6807\u8bc6\u7b26\u4e3a0
TxMessage.ExtId=0x12; // \u8bbe\u7f6e\u6269\u5c55\u6807\u793a\u7b26\uff0829\u4f4d\uff09
TxMessage.IDE=0; // \u4f7f\u7528\u6269\u5c55\u6807\u8bc6\u7b26
TxMessage.RTR=0; // \u6d88\u606f\u7c7b\u578b\u4e3a\u6570\u636e\u5e27\uff0c\u4e00\u5e278\u4f4d
TxMessage.DLC=len; // \u53d1\u9001\u4e24\u5e27\u4fe1\u606f
for(i=0;i<8;i++)
TxMessage.Data[i]=msg[i]; // \u7b2c\u4e00\u5e27\u4fe1\u606f
mbox= CAN_Transmit(CAN1, &TxMessage);
i=0;
while((CAN_TransmitStatus(CAN1, mbox)==CAN_TxStatus_Failed)&&(i<0XFFF))i++; //\u7b49\u5f85\u53d1\u9001\u7ed3\u675f
if(i>=0XFFF)return 1;
return 0;

}
//can\u53e3\u63a5\u6536\u6570\u636e\u67e5\u8be2
//buf:\u6570\u636e\u7f13\u5b58\u533a;
//\u8fd4\u56de\u503c:0,\u65e0\u6570\u636e\u88ab\u6536\u5230;
// \u5176\u4ed6,\u63a5\u6536\u7684\u6570\u636e\u957f\u5ea6;
u8 Can_Receive_Msg(u8 *buf)
{
u32 i;
CanRxMsg RxMessage;
if( CAN_MessagePending(CAN1,CAN_FIFO0)==0)return 0; //\u6ca1\u6709\u63a5\u6536\u5230\u6570\u636e,\u76f4\u63a5\u9000\u51fa
CAN_Receive(CAN1, CAN_FIFO0, &RxMessage);//\u8bfb\u53d6\u6570\u636e
for(i=0;i<8;i++)
buf[i]=RxMessage.Data[i];
return RxMessage.DLC;
}

///////////////////////////////////////////////////CAN2////////////////////////////////////////////////////

u8 CAN2_Mode_Init(u8 tsjw,u8 tbs2,u8 tbs1,u16 brp,u8 mode)
{

GPIO_InitTypeDef GPIO_InitStructure;
CAN_InitTypeDef CAN_InitStructure;
CAN_FilterInitTypeDef CAN_FilterInitStructure;
#if CAN_RX2_INT_ENABLE
NVIC_InitTypeDef NVIC_InitStructure;
#endif

RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB|RCC_APB2Periph_AFIO, ENABLE);//\u4f7f\u80fdPORTB\u65f6\u949f

RCC_APB1PeriphClockCmd(RCC_APB1Periph_CAN2, ENABLE);//\u4f7f\u80fdCAN2\u65f6\u949f

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_13;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; //\u590d\u7528\u63a8\u633d
GPIO_Init(GPIOB, &GPIO_InitStructure); //\u521d\u59cb\u5316IO

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;//\u4e0a\u62c9\u8f93\u5165
GPIO_Init(GPIOB, &GPIO_InitStructure);//\u521d\u59cb\u5316IO

//GPIO_PinRemapConfig(GPIO_Remap_CAN2,ENABLE);

//CAN\u5355\u5143\u8bbe\u7f6e
CAN_InitStructure.CAN_TTCM=DISABLE; //\u975e\u65f6\u95f4\u89e6\u53d1\u901a\u4fe1\u6a21\u5f0f //
CAN_InitStructure.CAN_ABOM=DISABLE; //\u8f6f\u4ef6\u81ea\u52a8\u79bb\u7ebf\u7ba1\u7406 //
CAN_InitStructure.CAN_AWUM=DISABLE; //\u7761\u7720\u6a21\u5f0f\u901a\u8fc7\u8f6f\u4ef6\u5524\u9192(\u6e05\u9664CAN->MCR\u7684SLEEP\u4f4d)//
CAN_InitStructure.CAN_NART=ENABLE; //\u7981\u6b62\u62a5\u6587\u81ea\u52a8\u4f20\u9001 //
CAN_InitStructure.CAN_RFLM=DISABLE; //\u62a5\u6587\u4e0d\u9501\u5b9a,\u65b0\u7684\u8986\u76d6\u65e7\u7684 //
CAN_InitStructure.CAN_TXFP=DISABLE; //\u4f18\u5148\u7ea7\u7531\u62a5\u6587\u6807\u8bc6\u7b26\u51b3\u5b9a //
CAN_InitStructure.CAN_Mode= CAN_Mode_Normal; //\u6a21\u5f0f\u8bbe\u7f6e\uff1a mode:0,\u666e\u901a\u6a21\u5f0f;1,\u56de\u73af\u6a21\u5f0f; //
//\u8bbe\u7f6e\u6ce2\u7279\u7387
CAN_InitStructure.CAN_SJW=CAN_SJW_1tq; //\u91cd\u65b0\u540c\u6b65\u8df3\u8dc3\u5bbd\u5ea6(Tsjw)\u4e3atsjw+1\u4e2a\u65f6\u95f4\u5355\u4f4d CAN_SJW_1tq CAN_SJW_2tq CAN_SJW_3tq CAN_SJW_4tq
CAN_InitStructure.CAN_BS1=CAN_BS1_8tq; //Tbs1=tbs1+1\u4e2a\u65f6\u95f4\u5355\u4f4dCAN_BS1_1tq ~CAN_BS1_16tq
CAN_InitStructure.CAN_BS2=CAN_BS2_7tq;//Tbs2=tbs2+1\u4e2a\u65f6\u95f4\u5355\u4f4dCAN_BS2_1tq ~ CAN_BS2_8tq
CAN_InitStructure.CAN_Prescaler=9; //\u5206\u9891\u7cfb\u6570(Fdiv)\u4e3abrp+1 //
CAN_Init(CAN2, &CAN_InitStructure); // \u521d\u59cb\u5316CAN2

CAN_FilterInitStructure.CAN_FilterNumber=14; //\u8fc7\u6ee4\u56680
CAN_FilterInitStructure.CAN_FilterMode=CAN_FilterMode_IdMask;
CAN_FilterInitStructure.CAN_FilterScale=CAN_FilterScale_32bit; //32\u4f4d
CAN_FilterInitStructure.CAN_FilterIdHigh=0x0000;////32\u4f4dID
CAN_FilterInitStructure.CAN_FilterIdLow=0x0000;
CAN_FilterInitStructure.CAN_FilterMaskIdHigh=0x0000;//32\u4f4dMASK
CAN_FilterInitStructure.CAN_FilterMaskIdLow=0x0000;
CAN_FilterInitStructure.CAN_FilterFIFOAssignment=CAN_Filter_FIFO0;//\u8fc7\u6ee4\u56680\u5173\u8054\u5230FIFO0
CAN_FilterInitStructure.CAN_FilterActivation=ENABLE; //\u6fc0\u6d3b\u8fc7\u6ee4\u56680

CAN_FilterInit(&CAN_FilterInitStructure);//\u6ee4\u6ce2\u5668\u521d\u59cb\u5316
#if CAN_RX2_INT_ENABLE

CAN_ITConfig(CAN2,CAN_IT_FMP0,ENABLE);//FIFO0\u6d88\u606f\u6302\u53f7\u4e2d\u65ad\u5141\u8bb8.

NVIC_InitStructure.NVIC_IRQChannel = CAN2_RX0_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1; // \u4e3b\u4f18\u5148\u7ea7\u4e3a1
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0; // \u6b21\u4f18\u5148\u7ea7\u4e3a0
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
#endif
return 0;
}

#if CAN_RX2_INT_ENABLE //\u4f7f\u80fdRX2\u4e2d\u65ad
//\u4e2d\u65ad\u670d\u52a1\u51fd\u6570
void CAN2_RX0_IRQHandler(void)
{
CanRxMsg RxMessage;
int i=0;
CAN_Receive(CAN2, 0, &RxMessage);
Can2_Send_Msg(RxMessage.Data,8);
}
#endif

//can\u53d1\u9001\u4e00\u7ec4\u6570\u636e(\u56fa\u5b9a\u683c\u5f0f:ID\u4e3a0X12,\u6807\u51c6\u5e27,\u6570\u636e\u5e27)
//len:\u6570\u636e\u957f\u5ea6(\u6700\u5927\u4e3a8)
//msg:\u6570\u636e\u6307\u9488,\u6700\u5927\u4e3a8\u4e2a\u5b57\u8282.
//\u8fd4\u56de\u503c:0,\u6210\u529f;
// \u5176\u4ed6,\u5931\u8d25;
u8 Can2_Send_Msg(u8* msg,u8 len)
{
u8 mbox;
u16 i=0;
CanTxMsg TxMessage;
TxMessage.StdId=0x12; // \u6807\u51c6\u6807\u8bc6\u7b26\u4e3a0
TxMessage.ExtId=0x12; // \u8bbe\u7f6e\u6269\u5c55\u6807\u793a\u7b26\uff0829\u4f4d\uff09
TxMessage.IDE=0; // \u4f7f\u7528\u6269\u5c55\u6807\u8bc6\u7b26
TxMessage.RTR=0; // \u6d88\u606f\u7c7b\u578b\u4e3a\u6570\u636e\u5e27\uff0c\u4e00\u5e278\u4f4d
TxMessage.DLC=len; // \u53d1\u9001\u4e24\u5e27\u4fe1\u606f
for(i=0;i<8;i++)
TxMessage.Data[i]=msg[i]; // \u7b2c\u4e00\u5e27\u4fe1\u606f
mbox= CAN_Transmit(CAN2, &TxMessage);
i=0;
while((CAN_TransmitStatus(CAN2, mbox)==CAN_TxStatus_Failed)&&(i<0XFFF))i++; //\u7b49\u5f85\u53d1\u9001\u7ed3\u675f
if(i>=0XFFF)return 1;
return 0;

}
//can\u53e3\u63a5\u6536\u6570\u636e\u67e5\u8be2
//buf:\u6570\u636e\u7f13\u5b58\u533a;
//\u8fd4\u56de\u503c:0,\u65e0\u6570\u636e\u88ab\u6536\u5230;
// \u5176\u4ed6,\u63a5\u6536\u7684\u6570\u636e\u957f\u5ea6;
u8 Can2_Receive_Msg(u8 *buf)
{
u32 i;
CanRxMsg RxMessage;
if( CAN_MessagePending(CAN2,CAN_FIFO0)==0)return 0; //\u6ca1\u6709\u63a5\u6536\u5230\u6570\u636e,\u76f4\u63a5\u9000\u51fa
CAN_Receive(CAN2, CAN_FIFO0, &RxMessage);//\u8bfb\u53d6\u6570\u636e
for(i=0;i<8;i++)
buf[i]=RxMessage.Data[i];
return RxMessage.DLC;
}

\u53ef\u4ee5\u7684\uff0c\u4f46\u662f\u7a0b\u5e8f\u9700\u8981\u7531\u4e24\u90e8\u5206\u7ec4\u6210\uff1a1.bootloader\uff1b2.\u5e94\u7528\u7a0b\u5e8f
bootloader\uff1a\u8d1f\u8d23\u66f4\u65b0\u7a0b\u5e8f\u7684\u62f7\u8d1d\u548c\u8df3\u8f6c\u5230\u5e94\u7528\u7a0b\u5e8f\uff1b
\u5e94\u7528\u7a0b\u5e8f\uff1a\u8fd0\u884c\u7a0b\u5e8f\u8981\u5b9e\u73b0\u7684\u529f\u80fd\u548c\u66f4\u65b0\u7a0b\u5e8f\u7684\u4e0b\u8f7d\u3001\u4fdd\u5b58\u3002
\u9996\u5148\uff0c\u5f00\u673a\u65f6\u8fd0\u884cbootloader\uff0cbootloader\u68c0\u6d4b\u7247\u5185Flash\uff08\u6216\u8005\u7247\u5916Flash\u6216\u8005FRAM\uff09\u201c\u7a0b\u5e8f\u66f4\u65b0\u6807\u5fd7\u201d\u662f\u5426\u7f6e\u4f4d\uff0c\u5982\u679c\u6ca1\u6709\uff0c\u5219\u76f4\u63a5\u8df3\u8f6c\u5230\u5e94\u7528\u7a0b\u5e8f\u3002\u5e94\u7528\u7a0b\u5e8f\u8fd0\u884c\u65f6\u68c0\u6d4b\u65e0\u7ebf\u6a21\u5757\u6536\u5230\u7684\u6570\u636e\u547d\u4ee4\uff0c\u5982\u679c\u6709updata\u547d\u4ee4\uff0c\u5219\u63a5\u6536\u7a0b\u5e8f\uff0c\u5e76\u4fdd\u5b58\u5230\u7247\u5185Flash\u7684\u9760\u540e\u7684\u4ee3\u7801\u6bb5\uff08\u6216\u8005\u7247\u5916Flash\uff09\uff0c\u63a5\u6536\u4fdd\u5b58\u5b8c\u6570\u636e\u540e\uff0c\u7247\u5185Flash\uff08\u6216\u8005\u7247\u5916Flash\u6216\u8005FRAM\uff09\u201c\u7a0b\u5e8f\u66f4\u65b0\u6807\u5fd7\u201d\u7f6e\u4f4d\uff0c\u7136\u540e\u91cd\u542fMCU\u3002MCU\u91cd\u65b0\u8fd0\u884cbootloader\uff0c\u6b64\u65f6bootloader\u68c0\u6d4b\u5230\u6709\u7a0b\u5e8f\u66f4\u65b0\u6807\u5fd7\uff0c\u5219\u5c06\u7247\u5185Flash\u7684\u9760\u540e\u7684\u4ee3\u7801\u6bb5\uff08\u6216\u8005\u7247\u5916Flash\uff09\u7684\u66f4\u65b0\u4ee3\u7801\u62f7\u8d1d\u56de\u5e94\u7528\u7a0b\u5e8f\u4ee3\u7801\u6bb5\uff0c\u5e76\u590d\u4f4d\u66f4\u65b0\u7a0b\u5e8f\u6807\u5fd7\uff0c\u7136\u540e\u8df3\u8f6c\u5230\u5e94\u7528\u7a0b\u5e8f\uff0c\u81f3\u6b64\u7a0b\u5e8f\u66f4\u65b0\u5b8c\u6bd5\u3002
ps\uff1a\u7f51\u4e0a\u6709\u5df2\u7ecf\u5b9e\u73b0\u7684\u4ee3\u7801\uff0c\u4f60\u53ef\u4ee5\u641c\u7d22\u201cSTM32 IAP\u201d\u3002

1. 扫描U盘寻找特定的固件升级文件;
2. 打开文件读入固件到Flash未使用的区间B;
3.构造一个IAP函数,其功能是将区间B的内容Copy到工作空间;
IAP函数仅仅是Flash操作,且不能有任何函数调用.
4. 将IAR函数拷贝到RAM中.
5. 调用RAM中的IAP函数。
6. MCU自复位

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STM32f105怎么用USB升级程序