char KeyboardGetChar()
{
if (KeyboardAddress == 0)
return 0;
int i;
for (i=0; i<6; i++)
{
int key = KeyboardGetKeyDown(KeyboardAddress, i);
if (key == 0)
break;
if (KeyWasDown(key))
continue;
if (key > 103)
continue;
char * table = KeysNormal;
struct KeyboardModifiers modifiers = KeyboardGetModifiers(KeyboardAddress);
if (modifiers.LeftShift || modifiers.RightShift)
table = KeysShift;
char value = table[key];
if (value != 0)
return value;
}
return 0;
}
int KeyboardUpdate()
{
do
{
if (KeyboardAddress == 0)
{
UsbCheckForChange();
if (KeyboardCount() == 0)
{
KeyboardAddress = 0;
return 0;
}
KeyboardAddress = KeyboardGetAddress(0);
if (KeyboardAddress == 0)
{
return 0;
}
}
int i;
for (i=0; i<6; i++)
{
KeyDown[i] = KeyboardGetKeyDown(KeyboardAddress, i);
}
} while (KeyboardPoll(KeyboardAddress) != 0);
return KeyboardAddress;
}
void KeyboardManager::serviceIRQ( void )
{
KeyboardPoll(usb_kbd_addr_);
uint8 scancode = KeyboardGetKeyDown(usb_kbd_addr_,0);
if (scancode > 0x80 || scancode == 0)
{
current_key_ = 0;
return;
}
struct KeyboardModifiers km = KeyboardGetModifiers(usb_kbd_addr_);
uint8 key = 0;
if (scancode <= 0x40 && (km.LeftShift || km.RightShift))
key = E0_KEYS[scancode];
else // numpad not yet implemented
key = STANDARD_KEYMAP[scancode];
if (key != current_key_)
{
if(main_console)
{
keyboard_buffer_.put( key ); // put it inside the buffer
main_console->addJob();
}
}
current_key_ = key;
}
/*
* keyboard_get_char
*
* 1. Check if KeyboardAddress is 0. If so, return 0.
* 2. Call KeyboardGetKeyDown up to 6 times. Each time:
* 2.1 If key is 0, exit loop.
* 2.2 Call KeyWasDown. If it was, go to the next key.
* 2.3 If the scan code is more than 103, go to the next key.
* 2.4 Call KeyboardGetModifiers
* 2.5 If shift is held, load the address of KeysShift. Otherwise load
* KeysNormal.
* 2.6 Read the ASCII value from the table.
* 2.7 If it is 0, go to the next key otherwise return this ASCII code and
* exit.
* 3. Return 0.
*/
int keyboard_get_char() {
int i, index, key;
BYTE modifiers, ascii_char;
index = 0;
assert(keyboard_address != 0);
for (i = 0; i < 6; i += 1) {
key = KeyboardGetKeyDown(keyboard_address, index);
if (key == 0) {
return 0;
}
if ((key > 103) || (key_was_down(key) == TRUE)) {
continue;
}
modifiers = KeyboardGetModifiers(keyboard_address);
/* 0x22: 0b00100010: Right shift and Left Shift */
if (modifiers & 0x22) {
ascii_char = keys_shift[key];
} else {
ascii_char = keys_normal[key];
}
if (ascii_char != 0) {
return ascii_char;
}
}
return 0;
}
/*
* keyboard_update
* Based on
* http://www.cl.cam.ac.uk/projects/raspberrypi/tutorials/os/input01.html
*
* 1. Retrieve a stored keyboard address (initially 0).
* 2. If this is not 0, go to 9.
* 3. Call UsbCheckForChange to detect new keyboards.
* 4. Call KeyboardCount to detect how many keyboards are present.
* 5. If this is 0 store the address as 0 and return; we can't do anything with
* no keyboard.
* 6. Call KeyboardGetAddress with parameter 0 to get the first keyboard's
* address.
* 7. Store this address.
* 8. If this is 0, return; there is some problem.
* 9. Call KeyboardGetKeyDown 6 times to get each key currently down and store
* them
* 10. Call KeyboardPoll
* 11. If the result is non-zero go to 3. There is some problem (such as
* disconnected keyboard).
*/
void keyboard_update() {
int keyboard_count;
int i;
do {
if (keyboard_address == 0) {
UsbCheckForChange();
keyboard_count = KeyboardCount();
kprintf("Got %d keyboard\n", keyboard_count);
if (keyboard_count == 0) {
keyboard_address = 0;
kprintf("No keyboard found\n", keyboard_count);
return;
}
keyboard_address = KeyboardGetAddress(0);
if (keyboard_address == 0) {
kprintf("Error! Keyboard address is %d\n", keyboard_address);
return;
}
}
// Call KeyboardGetKeyDown 6 times to get each key currently down and store
// them
for (i = 0; i < 6; i += 1) {
old_keys[i] = KeyboardGetKeyDown(keyboard_address, i);
}
} while (KeyboardPoll(keyboard_address) != 0);
return;
}
int keyboard_get_char_intr(volatile unsigned int kbd_address) {
int i, index, key;
short *tmp;
BYTE modifiers, ascii_char;
index = 0;
assert(kbd_address != 0);
for (i = 0; i < 6; i += 1) {
key = KeyboardGetKeyDown(kbd_address, index);
if (key == 0) {
reset_keys_buffer(new_keys_ptr);
ascii_char = 0;
break;
}
if ((key > 103) || (key_was_down_intr(key) == TRUE)) {
*(new_keys_ptr + i) = key;
continue;
}
modifiers = KeyboardGetModifiers(kbd_address);
/* 0x22: 0b00100010: Right shift and Left Shift */
if (modifiers & 0x22) {
ascii_char = keys_shift[key];
} else {
ascii_char = keys_normal[key];
}
if (ascii_char != 0) {
*(new_keys_ptr + i) = key;
break;
}
}
tmp = old_keys_ptr;
old_keys_ptr = new_keys_ptr;
new_keys_ptr = tmp;
return ascii_char;
}
