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| |
| /****************************************************************/ |
| /* */ |
| /* NG-Video 5,8GHz */ |
| /* */ |
| /* Copyright (C) 2011 - gebad */ |
| /* */ |
| /* This code is distributed under the GNU Public License */ |
| /* which can be found at http://www.gnu.org/licenses/gpl.txt */ |
| /* */ |
| /****************************************************************/ |
| |
| #include <stdlib.h> |
| #include <util/delay.h> |
| #include <avr/pgmspace.h> |
| |
| #include "config.h" |
| #include "dogm.h" |
| #include "tools.h" |
| #include "messages.h" |
| |
| #define MAX_POWER 10 |
| #define getPower(x) (int32_t)pgm_read_dword(&powers[x]) |
| const int32_t PROGMEM powers[MAX_POWER] = {1, 10, 100, 1000, 10000, 100000, 1000000, 10000000, 100000000, 1000000000}; |
| |
| /* Funktion zur Umwandlung einer vorzeichenbehafteten Integer |
| 32-Bit "Festkomma-Zahl"(gedachtes Komma in Integer) in einen String |
| vereinfacht Variablenübergabe funktion change_value(uint16_t x), |
| kein printf, double oder float |
| siehe http://www.mikrocontroller.net/articles/Festkommaarithmetik |
| len: max 13, Gesamtlänge des Resultats inklusive Vorzeichen und Komma, Rest wird mit ' ' aufgefüllt |
| fixedPoint: Position des Kommas im Integer-Wert. Bei Wert in mm und Anzeige in m ist das z.B. 3 |
| afterPoint: Ziffern nach dem Komma = wieviele der fixedPoint Ziffern angezeigt werden sollen |
| |
| Ist nicht genug Platz für die Zahl vorhanden werden nur '*' Zeichen ausgegeben! |
| makefile derzeit somit auch ohne! Minimalistic printf version*/ |
| |
| char *my_itoa(int32_t value, uint8_t len, uint8_t fixedPoint, uint8_t afterPoint) |
| { int8_t i; |
| int8_t digits, digitsNeeded; |
| uint8_t neg = 0; |
| static char str[13]; |
| |
| // Terminate string |
| str[len] = '\0'; |
| |
| // Reduce precision of value if we're not supposed to show all of the mantissa |
| if (fixedPoint > afterPoint) { |
| value /= getPower(fixedPoint - afterPoint); |
| fixedPoint = afterPoint; |
| } |
| |
| // Handle negative values |
| if (value < 0) { |
| value = -value; |
| neg = 1; |
| } |
| |
| // Check how many digits we've got in total and if it fits in our space |
| for (digits = 1; digits < MAX_POWER && value >= getPower(digits); digits++); |
| if (neg) digits++; // We also need space for the sign |
| if (fixedPoint) digits++; // Plus space for decimal point |
| |
| digitsNeeded = digits - len; |
| if (digitsNeeded > 0) { |
| // Not enough space, do something |
| if (digitsNeeded == fixedPoint || digitsNeeded == fixedPoint + 1) { // +1 = space for decimal point that we can get rid of |
| // If space is just big enough for integer part then simply don't show mantissa BUT ROUND CORRECTLY |
| value = (value + 5 * getPower(fixedPoint - 1)) / getPower(fixedPoint); |
| fixedPoint = 0; |
| } else if (digitsNeeded < fixedPoint) { |
| // We can reduce precision to make it fit (round correctly) |
| value = (value + 5 * getPower(digitsNeeded - 1)) / getPower(digitsNeeded); |
| fixedPoint -= digitsNeeded; |
| } else { |
| // Error, cannot display value! Let's show stars |
| for (i = len - 1; i >= 0; --i) str[i] = '*'; |
| return str; |
| } |
| } |
| |
| for (i = len - 1; i >= neg; --i) { |
| if (fixedPoint && i == len - fixedPoint - 1) { |
| // Insert decimal point at the right location |
| str[i] = Msg(MSG_KOMMA)[0]; |
| fixedPoint = 0; // Now in integer part |
| } else { |
| str[i] = (value % 10) + '0'; |
| value /= 10; |
| |
| // Break if we're in integer part and there are only zeros from this point on |
| if (value == 0 && fixedPoint == 0) { |
| --i; |
| break; |
| } |
| } |
| } |
| |
| // Insert sign |
| if (neg) str[i--] = '-'; |
| |
| // Rest is blank |
| for (; i >= 0; --i) |
| str[i] = ' '; |
| |
| return str; |
| } |
| |
| |
| // Trying to avoid floating point maths here. Converts a floating point string to an integer with a smaller unit |
| // i.e. floatStrToInt("4.5", 2) = 4.5 * 1E2 = 450 |
| int32_t floatStrToInt(const char *s, int32_t power1) |
| { char *endPtr; |
| int32_t v = strtol(s, &endPtr, 10); |
| |
| if (*endPtr == '.') { |
| for (s = endPtr + 1; *s && power1; s++) { |
| v = v * 10 + (*s - '0'); |
| --power1; |
| } |
| } |
| if (power1) { |
| // Table to avoid multiple multiplications |
| v = v * getPower(power1); |
| } |
| return v; |
| } |
| |
| |
| // Delay helper |
| void delay_ms100x(uint8_t delay) |
| { |
| for ( uint8_t i=0; i<delay; i++) |
| _delay_ms(100); |
| } |
| |
| |
| /************************************************************************************/ |
| /* */ |
| /* Zeitanzeige */ |
| /* */ |
| /************************************************************************************/ |
| |
| uint32_t TimeBase60(char *str, uint32_t time, uint8_t idx) |
| { uint32_t tmp = time % 60; |
| |
| str[idx] = (tmp / 10) + '0'; |
| str[idx + 1] = (tmp % 10) + '0'; |
| return time / 60; |
| } |
| |
| void Displ_TimeMS(int32_t time) |
| { char str[7]; |
| |
| str[6] = '\0'; |
| if (time < 0) { |
| time = abs(time); |
| str[0] = '-'; |
| } |
| else |
| str[0] = ' '; |
| time = TimeBase60(str, time, 4); |
| str[3] = ':'; |
| TimeBase60(str, time, 1); |
| lcdPuts(str); |
| } |
| |
| void Displ_TimeHMS(uint32_t time) |
| { char str[9]; |
| |
| time /= T2SECDIV; // Zähler aller 500µs |
| str[8] = '\0'; |
| time = TimeBase60(str, time, 6); |
| str[5] = ':'; |
| time = TimeBase60(str, time, 3); |
| str[2] = ':'; |
| TimeBase60(str, time, 0); |
| lcdPuts(str); |
| } |