我知道有很多关于状态的打印机问题...状态热敏打印机
我有一个西铁城CT-S310 II,我设法写字符的所有代码在没有USB问题libusb_bulk_transfer(文字,加粗,居中,CR,CUT_PAPER等):
#define ENDPOINT_OUT 0x02
#define ENDPOINT_IN 0x81
struct libusb_device_handle *_handle;
[detach kernel driver...]
[claim interface...]
[etc ...]
r = libusb_bulk_transfer(device_handle, ENDPOINT_OUT, Mydata, out_len, &transferred, 1000);
现在,我需要从打印机接收数据ckeck的状态,我的第一个想法是用相同的发送POS命令doc的“bulk_transfer”:
1D(hexa)72(hexa)n N => 1(发送PAPEL传感器状态)
和检索由“bulk_transfer”与结束点“ENDPOINT_IN”该文档说有8个字节以接收所述值:
bit 0,1 => paper found by paper near-end sensor 00H
bit 0,1 => paper not found by paper near-end sensor 03H
bit 1,2 => paper found by paper-end sensor 00H
bit 1,2 => paper not found by paper-end sensor 0CH
[...]
于是两个“bulk_transfer”,一个用于发送命令状态(ENDPOINT_OUT),一个用于接收结果(ENDPOINT_IN),但我总是有一个USB错误(“bulk_transfer”in read = -1)
也许USB不工作喜欢这个 ?所以,我的第二个想法是用在PrinterClass USB实现的功能与命令“control_transfer”:
int r = 0;
int out_len = 1;
unsigned char* _udata = NULL;
uint8_t bmRequestType = LIBUSB_ENDPOINT_IN | LIBUSB_REQUEST_TYPE_CLASS | LIBUSB_RECIPIENT_INTERFACE;
uint8_t bRequest = LIBUSB_REQUEST_GET_STATUS;
uint16_t wValue = 0; // the value field for the setup packet (?????)
uint16_t wIndex = 0; // N° interface printer (the index field for the setup packet)
r = libusb_control_transfer(device_handle, bmRequestType,bRequest,wValue, wIndex,_udata,out_len, USB_TIMEOUT);
我并不确切如何填补所有的参数,我知道这取决于我的设备,但DOC的libsub不是很明确。
什么是“wValue”?
什么是“wIndex”?接口号?
参数LIBUSB_ENDPOINT_IN默认为0x80,但是我的打印机使用0x81,我必须改变这个默认端点吗?
Bus 001 Device 004: ID 1d90:2060
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 2.00
bDeviceClass 0 (Defined at Interface level)
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 64
idVendor 0x1d90
idProduct 0x2060
bcdDevice 0.02
iManufacturer 1 CITIZEN
iProduct 2 Thermal Printer
iSerial 3 00000000
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 32
bNumInterfaces 1
bConfigurationValue 1
iConfiguration 0
bmAttributes 0xc0
Self Powered
MaxPower 0mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 2
bInterfaceClass 7 Printer
bInterfaceSubClass 1 Printer
bInterfaceProtocol 2 Bidirectional
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0040 1x 64 bytes
bInterval 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x02 EP 2 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0040 1x 64 bytes
bInterval 0
Device Status: 0x0001
Self Powered
在我的情况“control_transfer”的回应是纸或without.How发好“control_transfer”的请求,我的打印机?
所有帮助的状态始终为0 :(解决我的问题是值得欢迎的!