Nigel
0d8ef065e0
To ease the pain of debuggin I can now interact with the system through a very simplistic terminal. Hopefully things can be tested more easily by activating the piece through a simple command. The max characters for a command is 10. To achieve this I have had to make the following changes. - Changed IRQ to update a global status variable - Added a standalone keyboard driver with getKey functions - Changed the main kernel loop to display a prompt - Added a strncmp function to the clib/string file
51 lines
1017 B
C++
51 lines
1017 B
C++
#include "keyboard.h"
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KeyPressInfo keyPress {};
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void KeyHandled(){
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keyPress.ScanCode= 0x00;
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keyPress.PressedModifiers = 0x00;
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}
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char getASCIIKey(){
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char keyPressed;
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// Wait until a key is pressed
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while(keyPress.ScanCode == 0x00) {
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asm volatile ("NOP");
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}
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// Translate keycode to ascii
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// Probably a lookup table might be handy
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// Until 0x37
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const char* ASCIILookUp =
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"\01234567890-=\0\0QWERTYUIOP[]\0\0ASDFGHJKL;\'`\0\\ZXCVBNM,./\0";
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uint8_t ASCII_Index = keyPress.ScanCode - 3 ;
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//printf("ASCII_INDEX: %x\n", ASCII_Index);
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keyPressed = ASCIILookUp[ASCII_Index];
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KeyHandled();
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return keyPressed;
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}
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uint8_t getKey(){
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// Wait until a key is pressed
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while(keyPress.ScanCode == 0x00){
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asm volatile ("NOP");
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}
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if( keyPress.ScanCode > 0x37){
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keyPress.ScanCode = 0x00;
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return 0;
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}
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uint8_t ScanCode = keyPress.ScanCode;
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// KeyHandled();
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return ScanCode ;
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} |