QT图形视图框架(QGraphicsView)绘图并调用libusb通讯

#include "usb.h" libusb_device_handle *handle; uint8_t endpoint_in=0; uint8_t endpoint_out=0; uint8_t data_buf[32]={0}; int usb_Init(void) { int endpoint_num, number_interfaces, altesetting = -1; int i; int res; libusb_device *dev; struct libusb_config_descriptor *conf_desc; const struct libusb_endpoint_descriptor *endpoint; //data inial data_buf[0] = 0xaa; data_buf[31] = 0xed; //lib init libusb_init(NULL); //打开设备 handle = libusb_open_device_with_vid_pid(NULL, 0x0525, 0xa4a0); if(handle == NULL) { return draw_ERROR; } //获取端口 dev = libusb_get_device(handle); libusb_get_config_descriptor(dev, 0, &conf_desc); number_interfaces = conf_desc->bNumInterfaces; if(number_interfaces > 0) { altesetting = conf_desc->interface[0].num_altsetting; if(altesetting > 0) { endpoint_num = conf_desc->interface[0].altsetting[0].bNumEndpoints; if(endpoint_num > 0) { for(i = 0; i < endpoint_num; i++) { endpoint = &conf_desc->interface[0].altsetting[0].endpoint[i]; if ((endpoint->bmAttributes & LIBUSB_TRANSFER_TYPE_MASK) & \ (LIBUSB_TRANSFER_TYPE_BULK | LIBUSB_TRANSFER_TYPE_INTERRUPT)) { if (endpoint->bEndpointAddress & LIBUSB_ENDPOINT_IN) { if (!endpoint_in) endpoint_in = endpoint->bEndpointAddress; } else { if (!endpoint_out) endpoint_out = endpoint->bEndpointAddress; } } } } } } //释放配置描述符 libusb_free_config_descriptor(conf_desc); //卸载驱动内核 libusb_set_auto_detach_kernel_driver(handle, 1); //为指定的设备申请接口 res=libusb_claim_interface(handle, 0); if(res < 0) return draw_ERROR; return draw_OK; } int usb_Close(void) { libusb_exit(NULL); return draw_OK; } //function-1 int draw_ClearScreen(unsigned int Color) { int res; int size=0; data_buf[1] = 0x01; data_buf[2] = 0x01; data_buf[3] = (Color>>24)&0xff; data_buf[4] = (Color>>16)&0xff; data_buf[5] = (Color>>8)&0xff; res = libusb_interrupt_transfer(handle, endpoint_out, data_buf, 32, &size, 10); if (res >= 0) return draw_OK; else return draw_ERROR; } //function-2 int draw_Point(short x, short y, unsigned int Color) { int res; int size=0; data_buf[1] = 0x02; data_buf[2] = 0x03; data_buf[3] = (x>>8)&0xff; data_buf[4] = x&0xff; data_buf[5] = 0x11; data_buf[6] = (y>>8)&0xff; data_buf[7] = y&0xff; data_buf[8] = 0x11; data_buf[9] = (Color>>24)&0xff; data_buf[10] = (Color>>16)&0xff; data_buf[11] = (Color>>8)&0xff; res = libusb_interrupt_transfer(handle, endpoint_out, data_buf, 32, &size, 10); if (res >= 0) return draw_OK; else return draw_ERROR; } //-3 int draw_Line(short x1, short y1, short x2, short y2, unsigned int Color) { int res; int size=0; data_buf[1] = 0x03; data_buf[2] = 0x05; data_buf[3] = (x1>>8)&0xff; data_buf[4] = x1&0xff; data_buf[5] = 0x11; data_buf[6] = (y1>>8)&0xff; data_buf[7] = y1&0xff; data_buf[8] = 0x11; data_buf[9] = (x2>>8)&0xff; data_buf[10] = x2&0xff; data_buf[11] = 0x11; data_buf[12] = (y2>>8)&0xff; data_buf[13] = y2&0xff; data_buf[14] = 0x11; data_buf[15] = (Color>>24)&0xff; data_buf[16] = (Color>>16)&0xff; data_buf[17] = (Color>>8)&0xff; res = libusb_interrupt_transfer(handle, endpoint_out, data_buf, 32, &size, 10); if (res >= 0) return draw_OK; else return draw_ERROR; } //-4 int draw_Ellipse(char flag, short x, short y, short w, short h, unsigned int Color, unsigned int FillColor) { int res; int size=0; data_buf[1] = 0x04; data_buf[2] = 0x07; data_buf[3] = flag; data_buf[4] = 0x11; data_buf[5] = (x>>8)&0xff; data_buf[6] = x&0xff; data_buf[7] = 0x11; data_buf[8] = (y>>8)&0xff; data_buf[9] = y&0xff; data_buf[10] = 0x11; data_buf[11] = (w>>8)&0xff; data_buf[12] = w&0xff; data_buf[13] = 0x11; data_buf[14] = (h>>8)&0xff; data_buf[15] = h&0xff; data_buf[16] = 0x11; data_buf[17] = (Color>>24)&0xff; data_buf[18] = (Color>>16)&0xff; data_buf[19] = (Color>>8)&0xff; data_buf[20] = 0x11; data_buf[21] = (FillColor>>24)&0xff; data_buf[22] = (FillColor>>16)&0xff; data_buf[23] = (FillColor>>8)&0xff; res = libusb_interrupt_transfer(handle, endpoint_out, data_buf, 32, &size, 10); if (res >= 0) return draw_OK; else return draw_ERROR; } //-5 int draw_Rectangle(char flag, short x, short y, short w, short h, unsigned int Color, unsigned int FillColor) { int res; int size=0; data_buf[1] = 0x05; data_buf[2] = 0x07; data_buf[3] = flag; data_buf[4] = 0x11; data_buf[5] = (x>>8)&0xff; data_buf[6] = x&0xff; data_buf[7] = 0x11; data_buf[8] = (y>>8)&0xff; data_buf[9] = y&0xff; data_buf[10] = 0x11; data_buf[11] = (w>>8)&0xff; data_buf[12] = w&0xff; data_buf[13] = 0x11; data_buf[14] = (h>>8)&0xff; data_buf[15] = h&0xff; data_buf[16] = 0x11; data_buf[17] = (Color>>24)&0xff; data_buf[18] = (Color>>16)&0xff; data_buf[19] = (Color>>8)&0xff; data_buf[20] = 0x11; data_buf[21] = (FillColor>>24)&0xff; data_buf[22] = (FillColor>>16)&0xff; data_buf[23] = (FillColor>>8)&0xff; res = libusb_interrupt_transfer(handle, endpoint_out, data_buf, 32, &size, 10); if (res >= 0) return draw_OK; else return draw_ERROR; } //-6 int draw_Sector(char flag, short x, short y, short w, short h, float sr, float er, unsigned int Color, unsigned int FillColor) { int res; int size=0; int *data_temp; data_buf[1] = 0x06; data_buf[2] = 0x09; data_buf[3] = flag; data_buf[4] = 0x11; data_buf[5] = (x>>8)&0xff; data_buf[6] = x&0xff; data_buf[7] = 0x11; data_buf[8] = (y>>8)&0xff; data_buf[9] = y&0xff; data_buf[10] = 0x11; data_buf[11] = (w>>8)&0xff; data_buf[12] = w&0xff; data_buf[13] = 0x11; data_buf[14] = (h>>8)&0xff; data_buf[15] = h&0xff; data_buf[16] = 0x11; data_temp = (int *)&sr; data_buf[17] = (*data_temp>>24)&0xff; data_buf[18] = (*data_temp>>16)&0xff; data_buf[19] = (*data_temp>>8)&0xff; data_buf[20] = *data_temp&0xff; data_temp = (int *)&er; data_buf[21] = (*data_temp>>24)&0xff; data_buf[22] = (*data_temp>>16)&0xff; data_buf[23] = (*data_temp>>8)&0xff; data_buf[24] = *data_temp&0xff; data_buf[25] = (Color>>24)&0xff; data_buf[26] = (Color>>16)&0xff; data_buf[27] = (Color>>8)&0xff; data_buf[28] = (FillColor>>24)&0xff; data_buf[29] = (FillColor>>16)&0xff; data_buf[30] = (FillColor>>8)&0xff; res = libusb_interrupt_transfer(handle, endpoint_out, data_buf, 32, &size, 10); if (res >= 0) return draw_OK; else return draw_ERROR; } //-7 int draw_Polygon(char flag, unsigned int Color, unsigned int FillColor, short PointNum, short* Point) { int res; int size=0; int i = 0; int send_point = 0; data_buf[1] = 0x07; data_buf[2] = 0x05; data_buf[3] = flag; data_buf[4] = 0x11; data_buf[5] = (Color