Initializes the MCU for work with the PS/2 keyboard.

None.

Nothing.

External dependencies of the library from the top of the page must be defined before using this function.

sbit PS2_Data_Input            at GPIO_PIN43_bit;
sbit PS2_Clock_Input           at GPIO_PIN26_bit;
sbit PS2_Clock_Output          at GPIO_PIN26_bit;
...
Ps2_Config();                                       // Init PS/2 Keyboard

None.

The function retrieves information on key pressed.

• value: holds the value of the key pressed. For characters, numerals, punctuation marks, and space value will store the appropriate ASCII code. Routine “recognizes” the function of Shift and Caps Lock, and behaves appropriately. For special function keys see Special Function Keys Table.
• special: is a flag for special function keys (F1, Enter, Esc, etc). If key pressed is one of these, special will be set to 1, otherwise 0.
• pressed: is set to 1 if the key is pressed, and 0 if it is released.

• 1 if reading of a key from the keyboard was successful
• 0 if no key was pressed

PS/2 keyboard needs to be initialized. See Ps2_Config routine.

unsigned short keydata = 0, special = 0, down = 0;
...
// Press Enter to continue:
do {
  if (Ps2_Key_Read(&keydata, &special, &down)) {
    if (down && (keydata == 16)) break;
  }
} while (1);

None.