Help with host USB Printer Class
Hi,
I know this question have been asked many times but i still can find a solid answer that can really help.
I will try to ask again depends on the progress i have made and i hope if someone made this class that he could help.
My objective is to be able to print 1 label using stm32f407 and a label printer from brother just to check the feasibility of this usb host and printer setup, so i just wanted to create usb host CDC project and adopt it to work with printer, ST community recommended this approach or use MSC.
what did few changes on the usbh_cdc source and header files like this:
/*Communication Class codes*/
#define USB_CDC_CLASS 0x07U
#define COMMUNICATION_INTERFACE_CLASS_CODE 0x07U
/*Data Interface Class Codes*/
#define DATA_INTERFACE_CLASS_CODE 0x07U
/*Communication sub class codes*/
#define RESERVED 0xFFU
#define DIRECT_LINE_CONTROL_MODEL 0x01U
#define ABSTRACT_CONTROL_MODEL 0xFFU
#define TELEPHONE_CONTROL_MODEL 0x03U
#define MULTICHANNEL_CONTROL_MODEL 0x04U
#define CAPI_CONTROL_MODEL 0x05U
#define ETHERNET_NETWORKING_CONTROL_MODEL 0x06U
#define ATM_NETWORKING_CONTROL_MODEL 0x07U
/*Communication Interface Class Control Protocol Codes*/
#define NO_CLASS_SPECIFIC_PROTOCOL_CODE 0xFFU
#define COMMON_AT_COMMAND 0xFFU
#define VENDOR_SPECIFIC 0xFFUPrinter class is 0x07 and also changed many values to 0xFF because i don't know the exact value and i wanted to let the library to check all possibilities.
In the source file (usbh_cdc.c) i had to remove a lot of condition to make it work since in printer i don t have the same check or requirement like in normal CDC condition or device.
doing this i was able to display all informations about the printer, like the model, serial number, class id, subclass id, protocol and since i set the debug level to 3 i can see that class is started and device is activated.
in main i check if the Application is read, if yes, i use cdc transmit function to send messages.
but in the printer side nothing is happening.
i used the same command lines with a PC (c code) and it works.
maybe I'm missing setps or other configurations, maybe i did something wrong with configuration or the changes on the cdc class,
I will appreciate any advice or help.
Best regards