p kj / Mbed 2 deprecated LPC824-BlynkWeatherstation

Microduino

Dependencies:   mbed

Fork of Io_moon by Li Weiyi

Blynk_v0_3_7/Blynk/utility/utility.cpp@0:740c1eb2df13, 2016-06-23 (annotated)

Committer:
lixianyu
Date:
Thu Jun 23 11:16:14 2016 +0000
Revision:
0:740c1eb2df13
* AM2321?????????2s????i2c?????; * SimpleTimer??bug?????????????????????????; * Blynk??bug??????????????; * ?????????

Who changed what in which revision?

UserRevisionLine numberNew contents of line
lixianyu 0:740c1eb2df13 1 #include <Blynk/BlynkDebug.h>
lixianyu 0:740c1eb2df13 2
lixianyu 0:740c1eb2df13 3 #if defined(ESP8266) && !defined(BLYNK_NO_FLOAT)
lixianyu 0:740c1eb2df13 4 #include <string.h>
lixianyu 0:740c1eb2df13 5 #include <math.h>
lixianyu 0:740c1eb2df13 6
lixianyu 0:740c1eb2df13 7 char* dtostrf_internal(double number, signed char width, unsigned char prec, char *s) {
lixianyu 0:740c1eb2df13 8 if(isnan(number)) {
lixianyu 0:740c1eb2df13 9 strcpy(s, "nan");
lixianyu 0:740c1eb2df13 10 return s;
lixianyu 0:740c1eb2df13 11 }
lixianyu 0:740c1eb2df13 12 if(isinf(number)) {
lixianyu 0:740c1eb2df13 13 strcpy(s, "inf");
lixianyu 0:740c1eb2df13 14 return s;
lixianyu 0:740c1eb2df13 15 }
lixianyu 0:740c1eb2df13 16
lixianyu 0:740c1eb2df13 17 if(number > 4294967040.0 || number < -4294967040.0) {
lixianyu 0:740c1eb2df13 18 strcpy(s, "ovf");
lixianyu 0:740c1eb2df13 19 return s;
lixianyu 0:740c1eb2df13 20 }
lixianyu 0:740c1eb2df13 21 char* out = s;
lixianyu 0:740c1eb2df13 22 // Handle negative numbers
lixianyu 0:740c1eb2df13 23 if(number < 0.0) {
lixianyu 0:740c1eb2df13 24 *out = '-';
lixianyu 0:740c1eb2df13 25 ++out;
lixianyu 0:740c1eb2df13 26 number = -number;
lixianyu 0:740c1eb2df13 27 }
lixianyu 0:740c1eb2df13 28
lixianyu 0:740c1eb2df13 29 // Round correctly so that print(1.999, 2) prints as "2.00"
lixianyu 0:740c1eb2df13 30 double rounding = 0.5;
lixianyu 0:740c1eb2df13 31 for(uint8_t i = 0; i < prec; ++i)
lixianyu 0:740c1eb2df13 32 rounding /= 10.0;
lixianyu 0:740c1eb2df13 33
lixianyu 0:740c1eb2df13 34 number += rounding;
lixianyu 0:740c1eb2df13 35
lixianyu 0:740c1eb2df13 36 // Extract the integer part of the number and print it
lixianyu 0:740c1eb2df13 37 unsigned long int_part = (unsigned long) number;
lixianyu 0:740c1eb2df13 38 double remainder = number - (double) int_part;
lixianyu 0:740c1eb2df13 39 out += sprintf(out, "%d", int_part);
lixianyu 0:740c1eb2df13 40
lixianyu 0:740c1eb2df13 41 // Print the decimal point, but only if there are digits beyond
lixianyu 0:740c1eb2df13 42 if(prec > 0) {
lixianyu 0:740c1eb2df13 43 *out = '.';
lixianyu 0:740c1eb2df13 44 ++out;
lixianyu 0:740c1eb2df13 45 }
lixianyu 0:740c1eb2df13 46
lixianyu 0:740c1eb2df13 47 while(prec-- > 0) {
lixianyu 0:740c1eb2df13 48 remainder *= 10.0;
lixianyu 0:740c1eb2df13 49 if((int)remainder == 0){
lixianyu 0:740c1eb2df13 50 *out = '0';
lixianyu 0:740c1eb2df13 51 ++out;
lixianyu 0:740c1eb2df13 52 }
lixianyu 0:740c1eb2df13 53 }
lixianyu 0:740c1eb2df13 54 sprintf(out, "%d", (int) remainder);
lixianyu 0:740c1eb2df13 55
lixianyu 0:740c1eb2df13 56 return s;
lixianyu 0:740c1eb2df13 57 }
lixianyu 0:740c1eb2df13 58
lixianyu 0:740c1eb2df13 59 #endif
lixianyu 0:740c1eb2df13 60
lixianyu 0:740c1eb2df13 61