I want to interface USB printer to any embedded device. Where can i get examples for this? How can I send data to USB printer for printing? examples..
Sorry for taking so long to reply, but all that detail you gave took a long time to digest thoroughly.
If you really need to attach a USB printer, then a board running Linux might be a good starting point.
I want to interface a USB printer to a medical embedded device for printing data.
Is there any pseudo code or sample code for sending data to USB printer for printing? like USB host driver which can support printer class.
Any links for USB host driver sample code.
upload.wikimedia.org/.../Paris_Tuileries_Garden_Facepalm_statue.jpg
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From: ... any embedded device To: ... a medical embedded device ...
Sorry, judging by this rate of your expansion to detail i'll be long retired by the time you get to providing something meaningful!
Its a medical embedded device and i want to use USB printer for printing data.
I am learning USB interfacing.
Any suggestions are useful..
I'm going to stop now, because I might otherwise write something that you wouldn't like to read!
you have two options 1) use a micro with USB MASTER (many only can do USB slave) 2) use an external serial to usb convarter chip
Hi Parbal,
Your question sounds like complete novice on current scene of USB printers. Here is a brief introduction of USB printers.
1) Image printers Nowadays, most of printers on the market belong to this category. For these printers, host (PC) renders page dot images. The images are sent over USB using printers' specific protocols. Host requires rich resources (CPU/GPU power, memories, font storages) to render page images. Also, dedicated drivers of the specific protocols. In these reasons, a Linux board is realistic choice for embedded to connect to these printers, as Hamish suggested.
2) Character printers Around 20 years ago this type was the majority, but survives just for specific purpose, such as slip/label printers on cache registers, dot impact printers for business form. For these printers, host sends (ASCII) character codes and their position using ESC/P or PCL protocol. Printers put the fonts of the character codes on the specified position in papers. A 16 bits MCU of USB host is enough.
3) PostScript printers Also survive in high-end laser printers for publishers.
If you are interested in character printers, Microchip USB team had good work on their legacy library. http://www.microchip.com/mla v2013-06-15 ww1.microchip.com/.../microchip-libraries-for-applications-v2013-06-15-windows-installer.exe
These files are helpful to understand on character printers and its protocol. \microchip_solutions_v2013-06-15\Microchip\USB\Printer Host Driver\ - Documentation\Printer Study.xls : list of printers which support ESC/POS, or HP PCLs - usb_host_printer_esc_pos.c : implementation of ESC/POS - usb_host_printer_pcl_5.c : implementation of PCL5
IMHO, this is the "smart" way of these days; the data to print is sent once to an Android phone/tablet over wireless BlueTooth/NFC/IR or wired USB PHDC (Personal Healthcare Device Class). When the user wants a handout, he connects the phone/tablet wirelessly to a printer directly.
Tsuneo