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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 1915 | - | 1 | |
| 2 | /****************************************************************/ |
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| 3 | /* */ |
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| 4 | /* NG-Video 5,8GHz */ |
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| 5 | /* */ |
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| 6 | /* Copyright (C) 2011 - gebad */ |
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| 7 | /* */ |
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| 8 | /* This code is distributed under the GNU Public License */ |
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| 9 | /* which can be found at http://www.gnu.org/licenses/gpl.txt */ |
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| 10 | /* */ |
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| 11 | /****************************************************************/ |
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| 12 | |||
| 13 | #include <stdlib.h> |
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| 14 | #include <util/delay.h> |
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| 15 | #include <avr/pgmspace.h> |
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| 16 | |||
| 17 | //#include "config.h" |
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| 18 | //#include "dogm.h" |
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| 19 | #include "tools.h" |
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| 20 | //#include "messages.h" |
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| 21 | |||
| 22 | #define MAX_POWER 10 |
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| 23 | #define getPower(x) (int32_t)pgm_read_dword(&powers[x]) |
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| 24 | const int32_t PROGMEM powers[MAX_POWER] = {1, 10, 100, 1000, 10000, 100000, 1000000, 10000000, 100000000, 1000000000}; |
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| 25 | |||
| 26 | /* Funktion zur Umwandlung einer vorzeichenbehafteten Integer |
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| 27 | 32-Bit "Festkomma-Zahl"(gedachtes Komma in Integer) in einen String |
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| 28 | vereinfacht Variablenübergabe funktion change_value(uint16_t x), |
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| 29 | kein printf, double oder float |
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| 30 | siehe http://www.mikrocontroller.net/articles/Festkommaarithmetik |
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| 31 | len: max 13, Gesamtlänge des Resultats inklusive Vorzeichen und Komma, Rest wird mit ' ' aufgefüllt |
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| 32 | fixedPoint: Position des Kommas im Integer-Wert. Bei Wert in mm und Anzeige in m ist das z.B. 3 |
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| 33 | afterPoint: Ziffern nach dem Komma = wieviele der fixedPoint Ziffern angezeigt werden sollen |
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| 34 | |||
| 35 | Ist nicht genug Platz für die Zahl vorhanden werden nur '*' Zeichen ausgegeben! |
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| 36 | makefile derzeit somit auch ohne! Minimalistic printf version*/ |
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| 37 | |||
| 38 | char *my_itoa(int32_t value, uint8_t len, uint8_t fixedPoint, uint8_t afterPoint) |
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| 39 | { int8_t i; |
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| 40 | int8_t digits, digitsNeeded; |
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| 41 | uint8_t neg = 0; |
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| 42 | static char str[13]; |
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| 43 | |||
| 44 | // Terminate string |
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| 45 | str[len] = '\0'; |
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| 46 | |||
| 47 | // Reduce precision of value if we're not supposed to show all of the mantissa |
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| 48 | if (fixedPoint > afterPoint) { |
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| 49 | value /= getPower(fixedPoint - afterPoint); |
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| 50 | fixedPoint = afterPoint; |
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| 51 | } |
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| 52 | |||
| 53 | // Handle negative values |
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| 54 | if (value < 0) { |
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| 55 | value = -value; |
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| 56 | neg = 1; |
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| 57 | } |
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| 58 | |||
| 59 | // Check how many digits we've got in total and if it fits in our space |
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| 60 | for (digits = 1; digits < MAX_POWER && value >= getPower(digits); digits++); |
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| 61 | if (neg) digits++; // We also need space for the sign |
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| 62 | if (fixedPoint) digits++; // Plus space for decimal point |
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| 63 | |||
| 64 | digitsNeeded = digits - len; |
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| 65 | if (digitsNeeded > 0) { |
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| 66 | // Not enough space, do something |
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| 67 | if (digitsNeeded == fixedPoint || digitsNeeded == fixedPoint + 1) { // +1 = space for decimal point that we can get rid of |
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| 68 | // If space is just big enough for integer part then simply don't show mantissa BUT ROUND CORRECTLY |
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| 69 | value = (value + 5 * getPower(fixedPoint - 1)) / getPower(fixedPoint); |
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| 70 | fixedPoint = 0; |
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| 71 | } else if (digitsNeeded < fixedPoint) { |
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| 72 | // We can reduce precision to make it fit (round correctly) |
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| 73 | value = (value + 5 * getPower(digitsNeeded - 1)) / getPower(digitsNeeded); |
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| 74 | fixedPoint -= digitsNeeded; |
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| 75 | } else { |
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| 76 | // Error, cannot display value! Let's show stars |
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| 77 | for (i = len - 1; i >= 0; --i) str[i] = '*'; |
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| 78 | return str; |
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| 79 | } |
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| 80 | } |
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| 81 | |||
| 82 | for (i = len - 1; i >= neg; --i) { |
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| 83 | if (fixedPoint && i == len - fixedPoint - 1) { |
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| 84 | // Insert decimal point at the right location |
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| 85 | // str[i] = Msg(MSG_KOMMA)[0]; |
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| 86 | str[i] = ','; |
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| 87 | fixedPoint = 0; // Now in integer part |
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| 88 | } else { |
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| 89 | str[i] = (value % 10) + '0'; |
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| 90 | value /= 10; |
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| 91 | |||
| 92 | // Break if we're in integer part and there are only zeros from this point on |
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| 93 | if (value == 0 && fixedPoint == 0) { |
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| 94 | --i; |
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| 95 | break; |
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| 96 | } |
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| 97 | } |
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| 98 | } |
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| 99 | |||
| 100 | // Insert sign |
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| 101 | if (neg) str[i--] = '-'; |
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| 102 | |||
| 103 | // Rest is blank |
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| 104 | for (; i >= 0; --i) |
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| 105 | str[i] = ' '; |
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| 106 | |||
| 107 | return str; |
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| 108 | } |
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| 109 | |||
| 110 | |||
| 111 | // Trying to avoid floating point maths here. Converts a floating point string to an integer with a smaller unit |
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| 112 | // i.e. floatStrToInt("4.5", 2) = 4.5 * 1E2 = 450 |
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| 113 | int32_t floatStrToInt(const char *s, int32_t power1) |
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| 114 | { char *endPtr; |
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| 115 | int32_t v = strtol(s, &endPtr, 10); |
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| 116 | |||
| 117 | if (*endPtr == '.') { |
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| 118 | for (s = endPtr + 1; *s && power1; s++) { |
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| 119 | v = v * 10 + (*s - '0'); |
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| 120 | --power1; |
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| 121 | } |
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| 122 | } |
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| 123 | if (power1) { |
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| 124 | // Table to avoid multiple multiplications |
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| 125 | v = v * getPower(power1); |
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| 126 | } |
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| 127 | return v; |
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| 128 | } |
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| 129 | |||
| 130 | |||
| 131 | // Delay helper |
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| 132 | void delay_ms100x(uint8_t delay) |
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| 133 | { |
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| 134 | for ( uint8_t i=0; i<delay; i++) |
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| 135 | _delay_ms(100); |
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| 136 | } |
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| 137 | |||
| 138 | // |
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| 139 | ///************************************************************************************/ |
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| 140 | ///* */ |
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| 141 | ///* Zeitanzeige */ |
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| 142 | ///* */ |
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| 143 | ///************************************************************************************/ |
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| 144 | // |
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| 145 | //uint32_t TimeBase60(char *str, uint32_t time, uint8_t idx) |
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| 146 | //{ uint32_t tmp = time % 60; |
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| 147 | // |
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| 148 | // str[idx] = (tmp / 10) + '0'; |
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| 149 | // str[idx + 1] = (tmp % 10) + '0'; |
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| 150 | // return time / 60; |
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| 151 | //} |
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| 152 | // |
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| 153 | //void Displ_TimeMS(int32_t time) |
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| 154 | //{ char str[7]; |
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| 155 | // |
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| 156 | // str[6] = '\0'; |
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| 157 | // if (time < 0) { |
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| 158 | // time = abs(time); |
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| 159 | // str[0] = '-'; |
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| 160 | // } |
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| 161 | // else |
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| 162 | // str[0] = ' '; |
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| 163 | // time = TimeBase60(str, time, 4); |
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| 164 | // str[3] = ':'; |
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| 165 | // TimeBase60(str, time, 1); |
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| 166 | // lcdPuts(str); |
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| 167 | //} |
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| 168 | // |
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| 169 | //void Displ_TimeHMS(uint32_t time) |
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| 170 | //{ char str[9]; |
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| 171 | // |
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| 172 | // time /= T2SECDIV; // Zähler aller 500µs |
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| 173 | // str[8] = '\0'; |
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| 174 | // time = TimeBase60(str, time, 6); |
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| 175 | // str[5] = ':'; |
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| 176 | // time = TimeBase60(str, time, 3); |
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| 177 | // str[2] = ':'; |
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| 178 | // TimeBase60(str, time, 0); |
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| 179 | // lcdPuts(str); |
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| 180 | //} |