| Line No. | Rev | Author | Line |
|---|---|---|---|
| 1 | 6 | kaklik | /*! \file input.c \brief User-Input Functions. */ |
| 2 | //***************************************************************************** |
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| 3 | // |
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| 4 | // File Name : 'input.c' |
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| 5 | // Title : User-Input Functions |
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| 6 | // Author : Pascal Stang - Copyright (C) 2003 |
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| 7 | // Created : 2003.09.11 |
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| 8 | // Revised : 2003.09.11 |
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| 9 | // Version : 0.1 |
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| 10 | // Target MCU : Atmel AVR series |
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| 11 | // Editor Tabs : 4 |
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| 12 | // |
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| 13 | // This code is distributed under the GNU Public License |
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| 14 | // which can be found at http://www.gnu.org/licenses/gpl.txt |
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| 15 | // |
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| 16 | //***************************************************************************** |
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| 17 | |||
| 18 | //----- Include Files --------------------------------------------------------- |
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| 19 | #include "global.h" // include our global settings |
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| 20 | #ifdef __AVR_ATmega128__ |
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| 21 | #include "uart2.h" |
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| 22 | #else |
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| 23 | #include "uart.h" |
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| 24 | #endif |
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| 25 | #include "rprintf.h" // include printf function library |
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| 26 | |||
| 27 | #include "input.h" |
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| 28 | |||
| 29 | // defines and typedefs |
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| 30 | #ifndef INPUT_UART |
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| 31 | #define INPUT_UART 1 |
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| 32 | #endif |
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| 33 | |||
| 34 | // globals |
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| 35 | |||
| 36 | // functions |
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| 37 | u08 inputString(u08 termChar, u08 termLen, u08* data) |
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| 38 | { |
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| 39 | u08 s=0; |
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| 40 | u08 length=0; |
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| 41 | |||
| 42 | while(length < termLen) |
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| 43 | { |
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| 44 | // get input |
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| 45 | #ifdef __AVR_ATmega128__ |
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| 46 | while(!uartReceiveByte(INPUT_UART,&s)); |
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| 47 | #else |
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| 48 | while(!uartReceiveByte(&s)); |
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| 49 | #endif |
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| 50 | |||
| 51 | // handle special characters |
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| 52 | if(s == 0x08) // backspace |
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| 53 | { |
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| 54 | if(length > 0) |
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| 55 | { |
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| 56 | // echo backspace-space-backspace |
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| 57 | rprintfChar(0x08); |
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| 58 | rprintfChar(' '); |
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| 59 | rprintfChar(0x08); |
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| 60 | length--; |
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| 61 | } |
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| 62 | } |
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| 63 | else if(s == termChar) // termination character |
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| 64 | { |
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| 65 | // save null-termination |
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| 66 | data[length] = 0; |
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| 67 | break; |
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| 68 | } |
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| 69 | else |
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| 70 | { |
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| 71 | // echo character |
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| 72 | rprintfChar(s); |
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| 73 | // save character |
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| 74 | data[length++] = s; |
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| 75 | } |
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| 76 | } |
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| 77 | return length; |
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| 78 | } |
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| 79 | |||
| 80 | u08 asciiHexToByte(u08* string) |
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| 81 | { |
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| 82 | // convert 2-byte hex string to byte |
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| 83 | return (asciiHexToNibble(string[0])<<4) + asciiHexToNibble(string[1]); |
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| 84 | } |
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| 85 | |||
| 86 | u08 asciiHexToNibble(u08 character) |
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| 87 | { |
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| 88 | // convert 1-byte hex ascii character to nibble |
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| 89 | if((character >= 0x30) && (character <= 0x39)) |
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| 90 | return character-0x30; |
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| 91 | else if((character >= 'A') && (character <= 'F')) |
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| 92 | return character-'A'+10; |
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| 93 | else if((character >= 'a') && (character <= 'f')) |
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| 94 | return character-'a'+10; |
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| 95 | else return 0; |
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| 96 | } |
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