实验平台是STM32f103c8t6 最小板，想做个winusb通信。hid和cdc速度太慢了。用winusb的话使用Bulk传输，速度只受usb总线和stm32硬件把控制器的限制。 问题描述 ：
使用stm32f1作为usbdevice 然后只开启了一个winusb接口。
list_device
device type ref count
-------- -------------------- ----------
rtc RTC 0
winusb Miscellaneous Device 1
usbd USB Slave Device 0
可以看到生成出了usbd和winusb设备。
然后我写代码打开设备，进行读写，并使用python写了上位机测试代码。
python上位机可以收到stm32发过来的数据，但是python写给stm32的数据却一直没有收到
python上位机代码
from usb.backend import libusb1
import usb.core
#
USB_ID_VENDOR = 0x1234
USB_ID_PRODUCT = 0x5678
#print(usb.core.show_devices())
#usb_dev = usb.core.find(find_all=True,idVendor=USB_ID_VENDOR,idProduct=USB_ID_PRODUCT,backend=libusb1.get_backend() )
#for dev in usb_dev :
# print(dev)
usb_dev = usb.core.find(idVendor=USB_ID_VENDOR,idProduct=USB_ID_PRODUCT,backend=libusb1.get_backend() )
print(usb_dev)
usb_dev.write(0x01,"1")
while True:
data = usb_dev.read(0x81, 64,-1)
print(data)
usb_dev.write(0x01,data)
rtthread代码
#include "stdint.h"
#include "stdio.h"
#include "string.h"
#include "rtthread.h"
#include "rtdevice.h"
#define DBG_TAG "usb1"
#define DBG_LVL DBG_LOG
#include
#define USB_DEVICE_NAME "winusb"
static rt_device_t usb1_dev; /* usb 设备句柄 */
static struct rt_semaphore usb1_rx_sem; /* 用于接收消息的信号量 */
/* 接收数据回调函数 */
static rt_err_t usb1_rx_call(rt_device_t dev, rt_size_t size)
{
/* USB 接收到数据后产生中断，调用此回调函数，然后发送接收信号量 */
rt_kprintf("usb1 rx call :%dn",size);
rt_sem_release(&usb1_rx_sem);
return RT_EOK;
}
static rt_err_t usb1_tx_done(rt_device_t dev,void *buffer)
{
rt_kprintf("usb1 tx done :%pn",buffer);
return RT_EOK;
}
void usb1_send_0x123(void)
{
char *text = "123";
int size = rt_device_write(usb1_dev, 0,text, 3);
if (size < 0)
{
rt_kprintf("usb1 dev write data failed rc:%dn",size);
}
}
static void usb1_thread(void *param)
{
int rc = 0;
usb1_dev = rt_device_find(USB_DEVICE_NAME);
if (!usb1_dev)
{
rt_kprintf("find %s failed!n", USB_DEVICE_NAME);
return ;
}else
{
rt_kprintf("find %s ok!n", USB_DEVICE_NAME);
}
rt_sem_init(&usb1_rx_sem, "usb1_rx_sem", 0, RT_IPC_FLAG_FIFO);
/* 打开 USB 设备 */
rc = rt_device_open(usb1_dev, 0);
RT_ASSERT(rc == RT_EOK);
/* 设置回调函数 */
rt_device_set_rx_indicate(usb1_dev, usb1_rx_call);
rt_device_set_tx_complete(usb1_dev, usb1_tx_done);
uint8_t temp_buff[32] = {0};
while(1)
{
/* 循环读取数据，直到读取数据小于0表示缓存为空了 */
do{
rt_memset(temp_buff, 0, 32);
rc = rt_device_read(usb1_dev, 0, temp_buff, 32);
if(rc > 0)
{
rt_kprintf("usb read:%dn",rc);
for(int i=0; i < rc; i++)
{
rt_kprintf("0x%02X ",temp_buff);
}
rt_kprintf("n");
}
}while(rc <= 0);
rt_kprintf("usb read waitn");
/* 阻塞等待接收信号量 */
rt_sem_take(&usb1_rx_sem, RT_WAITING_FOREVER);
rt_kprintf("usb readn");
}
}
int usb1_test_init(void)
{
static int usb1_init = 0;
rt_thread_t tid;
if(usb1_init > 0)
{
return 0;
}
usb1_init = 1;
tid = rt_thread_create("usb1",usb1_thread, NULL,1024,20, 10);
if (tid != RT_NULL)
rt_thread_startup(tid);
return 0;
}
void usb1_test(uint8_t argc, char **argv)
{
rt_kprintf("usb1 testn");
usb1_send_0x123();
}
MSH_CMD_EXPORT(usb1_test, usb1 test);
void usb1_debug(uint8_t argc, char **argv)
{
if(argc > 1)
{
int val = atoi(argv[1]);
rt_kprintf("usb1 debug set %dn",val);
}
}
MSH_CMD_EXPORT(usb1_debug, usb1 debug);
配置
