STM32F411 USB读写测试程序 -

#include "sys.h"
#include "delay.h"
#include "usart.h"
#include "led.h"
#include "norflash.h"
#include "usbd_msc_core.h"
#include "usbd_usr.h"
#include "usbd_desc.h"
#include "usb_conf.h"
USB_OTG_CORE_HANDLE USB_OTG_dev;
extern vu8 USB_STATUS_REG; //USB状态
extern vu8 bDeviceState; //USB连接情况
int main(void)
{
u8 offline_cnt = 0;
u8 tct = 0;
u8 USB_STA;
u8 Divece_STA;
HAL_Init(); //初始化HAL库
Stm32_Clock_Init(96, 4, 2, 4); //设置时钟,96Mhz
delay_init(96); //初始化延时函数
uart_init(115200); //初始化USART
LED_Init(); //初始化LED时钟
Norflash_Init(); //SPI FLASH 初始化
printf("NANO STM32\r\n");
printf("USB Card Reader TEST\r\n");
NORFLASH_TYPE = Norflash_ReadID();//读取FLASH ID
while ((NORFLASH_TYPE==0) && (NORFLASH_TYPE==0XFFFF)) //检测不到FLASH芯片
{
printf("Flash Check Failed!\r\n");
delay_ms(500);
printf("Please Check!\r\n");
delay_ms(500);
LED0 = !LED0; //DS0闪烁
}
printf("SPI FLASH Size:2048KB\r\n");
printf("USB Connecting...\r\n");//提示USB连接中
USBD_Init(&USB_OTG_dev, USB_OTG_FS_CORE_ID, &USR_desc, &USBD_MSC_cb, &USR_cb);
delay_ms(1800);
while (1)
{
delay_ms(1);
if (USB_STA != USB_STATUS_REG) //状态改变了
{
if (USB_STATUS_REG & 0x01) //正在写
{
printf("USB Writing...\r\n");//提示USB正在写入数据
}
if (USB_STATUS_REG & 0x02) //正在读
{
printf("USB Reading...\r\n");//提示USB正在读出数据
}
if (USB_STATUS_REG & 0x04)printf("USB Write Err\r\n"); //提示写入错误
if (USB_STATUS_REG & 0x08)printf("USB Read Err\r\n"); //提示读出错误
USB_STA = USB_STATUS_REG; //记录最后的状态
}
if (Divece_STA != bDeviceState)
{
if (bDeviceState == 1) printf("USB Connected\r\n"); //提示USB连接已经建立
else printf("USB DisConnected\r\n");//提示USB被拔出了
Divece_STA = bDeviceState;
}
tct++;
if (tct == 200)
{
tct = 0;
LED0 = !LED0; //提示系统在运行
if (USB_STATUS_REG & 0x10)
{
offline_cnt = 0; //USB连接了,则清除offline计数器
bDeviceState = 1;
}
else //没有得到轮询
{
offline_cnt++;
if (offline_cnt > 10)bDeviceState = 0; //2s内没收到在线标记,代表USB被拔出了
}
USB_STATUS_REG = 0;
}
}
}

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