android读取usb设备数据

main.c

#include #include #include #include #include #include int main(int argc, char **argv){        char buff[64];        int i = 0,out =0;        static uint8_t read_ep;        struct usb_descriptor_header* desc;        struct usb_descriptor_iter iter;        struct usb_interface_descriptor *intf = NULL;        struct usb_endpoint_descriptor *ep1 = NULL;        struct usb_endpoint_descriptor *ep2 = NULL;        struct usb_device *p = usb_device_open("/dev/bus/usb/001/002");        int vendorId = usb_device_get_vendor_id(p);        int productId = usb_device_get_product_id(p);        printf("vid =  %x, pid = %x\n",vendorId,productId);            usb_descriptor_iter_init(p, &iter);            while ((desc = usb_descriptor_iter_next(&iter)) != NULL && (!intf || !ep1 || !ep2)) {                if (desc->bDescriptorType == USB_DT_INTERFACE) {                    intf = (struct usb_interface_descriptor *)desc;                } else if (desc->bDescriptorType == USB_DT_ENDPOINT) {                    if (ep1)                        ep2 = (struct usb_endpoint_descriptor *)desc;                    else                        ep1 = (struct usb_endpoint_descriptor *)desc;                }            }            if (!intf) {                printf("interface not found\n");                exit(1);            }            if (!ep1 || !ep2) {                printf("endpoints not found\n");                exit(1);            }            printf("%d,%d,%d\n",ep1->bEndpointAddress,ep2->bEndpointAddress,intf->bInterfaceNumber);            if (usb_device_claim_interface(p, intf->bInterfaceNumber)) {                printf("usb_device_claim_interface failed errno2:\n");                exit(1);            }            if ((ep1->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == USB_DIR_IN) {               read_ep = ep1->bEndpointAddress;            } else {                read_ep = ep2->bEndpointAddress;            }        for(i = 0;i<10;i++){                out = usb_device_bulk_transfer(p,read_ep,buff,64,0);                printf("out = %d\n",out);        }    return 0;}

Android.mk
LOCAL_PATH:= $(call my-dir)
include $(CLEAR_VARS)
LOCAL_SRC_FILES := main.c
LOCAL_MODULE := main
LOCAL_MODULE_TAGS := optional
LOCAL_STATIC_LIBRARIES := \
libusbhost \
include $(BUILD_EXECUTABLE)

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