this program is based on the PS/2 keyboard library and the LCD library, the lcd display whatever input is coming from the PS/2 keyboard.
PS2Kbd.cpp@0:3774ff2f9a59, 2011-01-30 (annotated)
- Committer:
- edwinb
- Date:
- Sun Jan 30 15:05:39 2011 +0000
- Revision:
- 0:3774ff2f9a59
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
edwinb | 0:3774ff2f9a59 | 1 | #include "PS2Kbd.h" |
edwinb | 0:3774ff2f9a59 | 2 | #include "mbed.h" |
edwinb | 0:3774ff2f9a59 | 3 | |
edwinb | 0:3774ff2f9a59 | 4 | |
edwinb | 0:3774ff2f9a59 | 5 | /* ================================================================== |
edwinb | 0:3774ff2f9a59 | 6 | * Constructor |
edwinb | 0:3774ff2f9a59 | 7 | ================================================================= */ |
edwinb | 0:3774ff2f9a59 | 8 | |
edwinb | 0:3774ff2f9a59 | 9 | PS2Kbd::PS2Kbd(PinName clk, PinName din) |
edwinb | 0:3774ff2f9a59 | 10 | : _ps2clk(clk), _ps2din(din) { |
edwinb | 0:3774ff2f9a59 | 11 | |
edwinb | 0:3774ff2f9a59 | 12 | } |
edwinb | 0:3774ff2f9a59 | 13 | |
edwinb | 0:3774ff2f9a59 | 14 | // ============================= |
edwinb | 0:3774ff2f9a59 | 15 | // |
edwinb | 0:3774ff2f9a59 | 16 | // ============================= |
edwinb | 0:3774ff2f9a59 | 17 | unsigned char PS2Kbd::rd(void) |
edwinb | 0:3774ff2f9a59 | 18 | { |
edwinb | 0:3774ff2f9a59 | 19 | unsigned int buf = 0x00; |
edwinb | 0:3774ff2f9a59 | 20 | int i; |
edwinb | 0:3774ff2f9a59 | 21 | |
edwinb | 0:3774ff2f9a59 | 22 | _ps2clk = 0; |
edwinb | 0:3774ff2f9a59 | 23 | |
edwinb | 0:3774ff2f9a59 | 24 | // both input |
edwinb | 0:3774ff2f9a59 | 25 | _ps2din.input(); |
edwinb | 0:3774ff2f9a59 | 26 | _ps2clk.input(); |
edwinb | 0:3774ff2f9a59 | 27 | |
edwinb | 0:3774ff2f9a59 | 28 | for(i=0;i<11;i++) { |
edwinb | 0:3774ff2f9a59 | 29 | while(_ps2clk); |
edwinb | 0:3774ff2f9a59 | 30 | while(!_ps2clk); |
edwinb | 0:3774ff2f9a59 | 31 | buf = buf >> 1; |
edwinb | 0:3774ff2f9a59 | 32 | buf |= _ps2din ? 512 : 0; |
edwinb | 0:3774ff2f9a59 | 33 | } |
edwinb | 0:3774ff2f9a59 | 34 | |
edwinb | 0:3774ff2f9a59 | 35 | // output |
edwinb | 0:3774ff2f9a59 | 36 | _ps2clk.output(); |
edwinb | 0:3774ff2f9a59 | 37 | |
edwinb | 0:3774ff2f9a59 | 38 | buf &= 0xFF; |
edwinb | 0:3774ff2f9a59 | 39 | |
edwinb | 0:3774ff2f9a59 | 40 | return(ps2KeyMap[(unsigned char)buf]); |
edwinb | 0:3774ff2f9a59 | 41 | //return (unsigned char)buf; |
edwinb | 0:3774ff2f9a59 | 42 | } |
edwinb | 0:3774ff2f9a59 | 43 | |
edwinb | 0:3774ff2f9a59 | 44 | |
edwinb | 0:3774ff2f9a59 | 45 | // ============================= |
edwinb | 0:3774ff2f9a59 | 46 | // |
edwinb | 0:3774ff2f9a59 | 47 | // ============================= |
edwinb | 0:3774ff2f9a59 | 48 | void PS2Kbd::wr(unsigned char) |
edwinb | 0:3774ff2f9a59 | 49 | { |
edwinb | 0:3774ff2f9a59 | 50 | unsigned int buf = 0x00; |
edwinb | 0:3774ff2f9a59 | 51 | int i; |
edwinb | 0:3774ff2f9a59 | 52 | |
edwinb | 0:3774ff2f9a59 | 53 | _ps2clk = 0; |
edwinb | 0:3774ff2f9a59 | 54 | |
edwinb | 0:3774ff2f9a59 | 55 | // both input |
edwinb | 0:3774ff2f9a59 | 56 | _ps2din.input(); |
edwinb | 0:3774ff2f9a59 | 57 | _ps2clk.input(); |
edwinb | 0:3774ff2f9a59 | 58 | |
edwinb | 0:3774ff2f9a59 | 59 | for(i=0;i<11;i++) { |
edwinb | 0:3774ff2f9a59 | 60 | while(_ps2clk); |
edwinb | 0:3774ff2f9a59 | 61 | while(!_ps2clk); |
edwinb | 0:3774ff2f9a59 | 62 | buf = buf >> 1; |
edwinb | 0:3774ff2f9a59 | 63 | buf |= _ps2din ? 512 : 0; |
edwinb | 0:3774ff2f9a59 | 64 | } |
edwinb | 0:3774ff2f9a59 | 65 | |
edwinb | 0:3774ff2f9a59 | 66 | // output |
edwinb | 0:3774ff2f9a59 | 67 | _ps2clk.output(); |
edwinb | 0:3774ff2f9a59 | 68 | |
edwinb | 0:3774ff2f9a59 | 69 | buf &= 0xFF; |
edwinb | 0:3774ff2f9a59 | 70 | |
edwinb | 0:3774ff2f9a59 | 71 | } |
edwinb | 0:3774ff2f9a59 | 72 | |
edwinb | 0:3774ff2f9a59 | 73 |