Osdev mouse. Jul 16, 2017 · 1) Focus on keyboard first, leave mouse for once that's done =P 2) Figure out how to handle PS/2 packets (interrupts included) 3) Look at the format in which they send data (it's just a few bytes) Sep 21, 2020 · I am writing an OS. ps. eg you will need to reprogram Mar 11, 2007 · There has been alot of people with mouse problem in the forum, so i have code a simple demo, of a working mouse driver, that does not use any OS code and is fully self contained. Most, if not all modern machines do this. Jump to navigation Jump to search. Sep 11, 2003 · Both the mouse and the keyboard are managed by the controller (i8042). Jan 12, 2022 · Well, it depends. Can anyone explain me what I must do in order to make the OS recognize the mouse ?. The SMM BIOS that's providing the PS/2 USB Legacy Support may not support extended memory techniques or Long Mode and may cause system crashes. Jan 19, 2005 · The way that mouse/keyboard command ACK bytes (which are VERY important!) are handled is completely OS dependent. The PS/2 Keyboard is a device that talks to a PS/2 controller using serial communication. Plug-and-Play (PNP) PNP Calls In Library to manage a PS2 mouse. Jun 8, 2024 · Every operating system that needs to work with the hardware (efficiently) must make use of interrupts. 0 devices, and in fact, it doesn't. I'm doing all this in NASM x64 assembly and the OS is emulated in QEMU with a PS/2 mouse. A message sent, from a Logitech mouse is a 5 byte message, containing the button information (3 buttons), and x,y positions, between the first time and the second time it was moved. . For example, a keyboard controller can send an interrupt when a character key was press Dec 30, 2021 · Coding a GUI takes lots of time, knowledge, and patience. I wrote some code to initialize the mouse and it seems to be working fine. 0, the USB-IF insisted on a single implementation. The keyboard works correctly, regardless of the mouse. Jun 2, 2003 · Also, this code will be merged with the keyboard interrupt handler, and if the mouse outbuffer full flag is set the scancode will be sent to the mouse queue, otherwise it will be sent to the keyboard queue, that is why the check for mouse output buffer full is inside the while loop for the keyboard buffer being full. On real hardware it supports wheel-less mice and 3 button wheel mice. 2) A Wheel Mouse will return an ID byte of zero, and a 3-byte packet not including the wheel axis until you tell it to. inc" boot_start: xor ax, ax ; DS=SS=ES=0 mov ds, ax mov ss, ax ; Stack at 0x0000:0x7c00 Library to manage a PS2 mouse. org. Feb 11, 2009 · 2) you have to assume that it's a USB mouse in SMM PS2 emulation mode, and keep the mouse and keyboard drivers separate, and only read one mouse byte at a time on an IRQ12, and only read one keyboard byte at a time on an IRQ1. I am following this OSDev Wiki tutorial about PS/2 Mouse drivers and I'm trying to write mine so I can add it to my C kernel (in protected mode). Are you still in real-mode? If so, getting mouse movements from a USB mouse is emulated and programmed just like getting mouse movements from a PS2 mouse, as long as the hardware emulates the mouse. PS2 mouse init shouldn't even be part of the Jan 3, 2019 · For the mouse, if its a serial mouse then you need to access the serial port directly (RS232 (i think)) or if its a PS2 mouse then it is also programmed through ports in the keyboard. Mouse; Serial Ports (primarily RS-232) Plug and Play. So if your Keyboard driver is not aware of the mouse driver, it will throw away mouse data and likewise for the mouse driver. This is my IRQ 12 handler. So I've been trying to create a mouse driver (PS/2), from various sources, and this is what I've come up with: IRQ problem - Pastebin. I just need boot-time mouse for now in the most simple variant, e. May 5, 2007 · 10x a lot, that would help making the mousedriver. The keyboard will work right after booting - if you want to use the mouse you'll have to setup a few things first: Overview. org Jul 10, 2023 · USB Human Interface Devices (HID) are devices that, like the name suggests, allow an interface that lets humans interact with the computer. 0 specification requires that a USB 2. Contribute to szhou42/osdev development by creating an account on GitHub. If the mouse is not moving and no buttons are being clicked a mouse will not generate any automatic packets. "Mouse toggle method" enables you to choose from a list hotkey to switch between mouse capture enabled or disabled. get docs on keyboard and mouse hardware for more info, there is a lot of things needed to be done before they work well in Pmode. These tiny mouse pointer windows are always on the top of all other windows and this is reflected in the data structures maintaining the z-order of all the Mar 24, 2012 · The page I am talking about can be found here -> Mouse Input. Oct 22, 2004 · Actually, any time the mouse gets moved or clicked. I don't know exactly the reason. I read several guides on ps/2 mouse especially on osdev wiki and copie Jun 24, 2024 · From OSDev Wiki. You read and acknowledge data from the controller using the same ports. I followed the ps2 mouse article on osdev and got some parts from SANiK's mouse code. Mar 7, 2007 · What are the sources, or at least the algorithm you are using to gather them? The best approach would be to read 1 at a time and return from the ISR and then the next, and the next. I analyzed the different values returned by the mouse and found that frequently, they are not continuous. g. Feb 10, 2024 · PS/2 is a type of serial communication, typically used for user input devices (keyboard, mouse, bar code scanner, etc). It involves a controller (e. If I move the mouse slowly the x and y counters return +2 but suddenly they Feb 22, 2005 · The problem (imho) may arise when 8042 still has things to deliver, but not for the mouse. I did not have a mouse with 4th or 5th button to test with, but should work fine. Welcome to OSDev. The keyboard will work right after booting - if you want to use the mouse you'll have to setup a few things first: Aug 5, 2021 · The IDT is setup correctly as my mouse interrupt handler is called when I manually initiate a software interrupt (int 12). 0 interface support USB 1. - Brandon I just finished the keyboard and thought why not continue with the mouse. The default rate is 100 packets per second if the mouse is being moved. Have a look at the attached files. I was just searching for some quick-to-integrate PS2 mouse code for Clicker A hobby operating system built mostly from scratch. However, no matter what I do with the mouse, I do not get a hardware interrupt both on QEMU and a real pc. Mouse position can be updated instantaneously, but keyboard input needs to be queued and how that is implemented is fundamental to the driver design AND is completely OS dependent. --Pancakes 15:05, 24 March 2012 (CDT) We might need really to enter into talking about the mouse from a platform neutral stance like I kind of did okay on this page. Jun 5, 2005 · ;the way we check for mouse activity is to set the mousereport buffer to;something the mouse can not possibly give (09090909) ;the mouse report is written to "mousereportbuf";after a report is given you have to queue up a new request;and "zero" out the mousereport buffer;the mouse report bytes are similar for both ps2 and usb mice Nov 13, 2003 · So far so good. However, even though the USB 2. Jun 5, 2005 · ;the way we check for mouse activity is to set the mousereport buffer to;something the mouse can not possibly give (09090909) ;the mouse report is written to "mousereportbuf";after a report is given you have to queue up a new request;and "zero" out the mousereport buffer;the mouse report bytes are similar for both ps2 and usb mice Mar 1, 2014 · I made my mouse pointer out of multiple windows, each of which being just one or just a few pixels large. You need to know how to get into a graphics mode and plot pixels, lines, and shapes on the screen for starters. See full list on wiki. Coincidentally, the day I posted a bug report detailing it, but not in response to that bug report. Here is the code for my mouse setup: What are the sources, or at least the algorithm you are using to gather them? The best approach would be to read 1 at a time and return from the ISR and then the next, and the next. Jan 21, 2019 · MOUSE_PKT_BYTES equ 3 ; Number of bytes in mouse packet MOUSE_RESOLUTION equ 3 ; Mouse resolution 8 counts/mm VIDEO_MODE equ 0x13 bits 16 cpu 8086 ORG 0x7c00 ; Include a BPB (1. First, I sent the command byte 0x60 to the port 0x64 followed by this status byte to the port 0x60 : Note that it's perfectly legal (and very expected if a button was clicked but the mouse wasn't moved and the X & Y position fields are both zero) for the mouse to send the same value for 2 or more bytes in a packet. osdev. Oct 11, 2020 · Question about which tools to use, bugs, the best way to implement a function, etc should go here. That is, you can't use the "mouse bit" (IIRC port 0x64 bit 5) to determine where a byte comes from. It's finally been fixed in git. again: in al, 0x64 ; Read from keyboardcontroller test al Sep 11, 2003 · Both the mouse and the keyboard are managed by the controller (i8042). I walked here and there. That code is awful - doesn't check if mouse is plugged in, doesn't reset the mouse before initialising, ignores time-outs, uses a variable speed loop for measuring time, doesn't have any separation between "PS/2 controller driver" and "PS/2 device driver", doesn't check the "must be 1" bit in the first byte to make sure it stays in sync/first byte of packet actually is first byte, uses magic Jan 12, 2022 · Well, it depends. "8042 chip" on PC compatible systems), the mechanical and electrical details of the communication itself, and a device. Each item being completely separate of each other. The mouse driver is independent of the mouse cursor. The OS has to have a graphics driver and a mouse driver at the very least, so it can check for mouse clicks on areas like buttons on the screen. A mouse also generates a packet if a button is either pressed or released. This leads me to believe that the issue is with my mouse setup. Sadly, I don't really know how I would go about writing a mouse driver since I'm still fairly amateur. If it is from a microsoft mouse, 3 bytes are send, with similar information, just with only 2 buttons. It means you should combine the upper bits of the X and Y values from the first byte of the mouse packet with the remaining 8 bits in the second and third bytes, and sign-extend the 9-bit results into shorts or ints or whichever signed integer type is most convenient for you. Let's take the following example : - a mouse byte is received by 8042, IRQ raised - your mouse handler is called - a keyboard byte is received by 8042, which waits for mouse byte to be read - your mouse handler successfully extracts one mouse byte Sep 1, 2010 · No. bmp with the mouse image - loaded into memory by any process and fed to the gui - in combination with a back buffer of the same size as the mouse pointer: draw, save each pixel you draw on in the mean time. Hobby os project with GUI. Actually, I can figure out some problem in the mouse code itself, so before we continue, lets make things clear. Ideally, each different type of PS/2 controller driver should provide some sort of standard/simple "send byte/receive byte" interface, and the PS/2 Keyboard driver would use this interface without caring about lower level details (like what type of PS/2 controller the device is plugged into). Then when I click my left mouse button it prints a 9 to the screen. (It behaves almost exactly like a keyboard does when you don't read port 0x60 after each interrupt: future interrupts are no longer generated. Since no multithreading I do not worry about IRQ latency, getting all three bytes of mouse data seems simpler than one by IRQ and trying to sync. move: erase pointer from old loco (restore contents of Oct 10, 2006 · Personally I have grabbed over more than 6 mouse drivers and all didn't work. I have tried either USB and PS/2 mouse, same result. Don't forget to see if your question is answered in the wiki first! Mar 20, 2006 · For mouse drawing in Vesa I'd use a (depending on your target resolution) small *. Marvelous! However if I click again or move the mouse, it no longer calls the interrupt handler. Here is the code for my mouse setup: Nov 10, 2010 · The only thing I would like to know is, does you mouse code work properly? I mean, do you recieve proper packets from the mouse? Before worrying about the keyboard, I think it would help to know if the mouse code works as intended. This function is taken from Minix. It is important to use box drawing characters, because normally VGA displays fonts as 9x16, adding an empty 9th column, which would cause a "gap" in the pointer. But it works when mouse disabled. Mar 3, 2023 · In designing USB 2. com. Aug 5, 2021 · The IDT is setup correctly as my mouse interrupt handler is called when I manually initiate a software interrupt (int 12). The protocol used by USB HID devices is defined in the USB HID specification. A USB mouse generally emulates a PS2 mouse, except that it generates IRQs from the USB bus, and not IRQ 12. Good idea is to also select the checkbox "enable mouse capture". I have written "some" keyboard drivers and I wanted make a little mouse support, maybe a cursor. Dec 30, 2018 · I have developed an own OS entirely in Assembly, now I want to implement a mouse driver because I see that the INT 33h in Windows with EMU8086 works but when I boot from floppy it doesn't work. And then I used the existing window-handling code to draw and redraw the pointer. Till after 3 weeks I discovered by luck that the function set lights in key board driver initialization is the reason. For example, you could use the entirety of an AP to poll the mouse, or you could use the mouse IRQs instead and save much more CPU time, and a lot of electrical load. Therefore, every reasonable operating system makes use of interrupts. Common examples include USB mice, USB keyboards, USB joysticks, and other such devices. That single implementation is Intel's Enhanced Host Controller Interface (EHCI). 0 devices, this doesn't mean that the EHCI must support USB 1. Jun 22, 2003 · Another thing to watch for is mouse acknowledgment scancodes, which come in the form of 0xFA bytes that look exactly like other movement scancodes, but have to be ignored if you sent a command to the mouse that sends back acknowledgment. Apr 8, 2024 · Interrupts are signals from a device, such as a keyboard or a hard drive, to the CPU, telling it to immediately stop whatever it is currently doing and do something else. Sep 1, 2010 · No. The GUI mouse driver calls the hardware mouse driver to see if the coordinates have changed, if so, updates the coordinates of the GUI cursor position. Then branch out into a more detailed explanation of the mouse (Mouse_Input, like here)) and the keyboard (PS2_Keyboard Dec 12, 2018 · Octocontrabass wrote:Your code has a variety of issues. My code for MouseWait does roughly the same thing. But yes, for the pmode mouse driver I will follow better way. Aug 27, 2001 · My PS2 Mouse works in my OS but its movements are not smooth. Let's take the following example : - a mouse byte is received by 8042, IRQ raised - your mouse handler is called - a keyboard byte is received by 8042, which waits for mouse byte to be read - your mouse handler successfully extracts one mouse byte Mar 1, 2014 · I made my mouse pointer out of multiple windows, each of which being just one or just a few pixels large. The common part is that the KBC will queue data and mix the mouse and keyboard data. Brands: Genius, Logitech, Microsoft all ok. - stevej/osdev Mar 30, 2011 · For us hobby OS devs, this was an easy one to suffer from as the combination of a scancode set 1 keyboard driver and the regular PS/2 mouse resulted in all sorts of horrible corruption - move the mouse while typing and the both will suffer in painfully obvious ways; but for OSes with more advanced drivers it was more difficult to observe Jun 7, 2024 · Then when the mouse moved, the original 4 bytes are restored on screen, and the whole procedure repeated on the new position. What happens is when I move the mouse, or click a button, nothing happens, but the keyboard triggers both an IRQ1 and an IRQ12. I would've liked to see some information about the hardware or something more than just throwing code at people, but I especially like the note about the three IRQs, which a lot of people miss when writing mouse drivers. A mouse is usually initialized to generate movement packets at a particular rate. Apr 21, 2019 · When a_type is 0, it checks for bit 1, otherwise it checks for bit 2. Nov 22, 2019 · Also, keep in mind that there are completely independent items here. Any tips you can give are great! Feb 14, 2005 · tnx for the code, by the way. For example extended mouse modes needed to use the scroll wheel won't work or the keyboard only works on the first PS/2 connector and the mouse only on the second connector. Perhaps the biggest is the name: you're trying to write a mouse driver, but most of the code you've written is for the PS/2 controller. mouseID 0. Aug 10, 2002 · Bumped a 6 year old thread? On the bright side of things, the tutorial isn't half bad. Sep 21, 2020 · What if you are configuring the keyboard and the mouse happens to be moved? You will get a byte from the mouse packet thinking that it is a configuration byte for the keyboard. Some chipsets support emulating USB Mar 30, 2011 · QEMU has had a bug for quite some time now that caused reliable stream corruption for PS/2 devices due to a race in setting flags and delivering interrupts. However, I cannot correctly parse the information I am getting from the mouse. USB Mouse. For eg. When I move the pointer from one place to another, it moves in a different place. : sorry for the tabs, it looked fine in editor. These tiny mouse pointer windows are always on the top of all other windows and this is reflected in the data structures maintaining the z-order of all the Feb 22, 2005 · The problem (imho) may arise when 8042 still has things to deliver, but not for the mouse. Contribute to rust-osdev/ps2-mouse development by creating an account on GitHub. Feb 8, 2011 · Tested on Bochs, VirtualBox and real hardware. Also worked with a legacy-mode USB wheel mouse. Mar 13, 2013 · Code: Select all os_mouse_setup: call mouse_port_enable call mouse_activate call mouse_get_byte ; Get the responce byte of the mouse ret mouse_port_enable: mov al, 0xa8 ; Enable mouse port out 0x64, al ; Write to keyboardcontroller call keyboard_check_port ; Check if command is progressed (demand!) ret keyboard_check_port: xor cx, cx . 44MB floppy with FAT12) to be more compatible with USB floppy media %include "bpb. FYI - I'm planning on writing a PS/2 mouse tutorialover the next week or so in my free time. The code does not fail, the return indicates it is done waiting, unless it isn't and it reached the timeout, in which case MouseAvailable (which is a bool) is set to false (by default it is true). Revised all ISR routines. rekz ull hfoi pdhcos dcptxg ldvaa hysmox kjqxxz bwledozwp zakjq
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