Mirror/ardupilot
5
0
Fork 0
mirror of https://github.com/ArduPilot/ardupilot synced 2025-01-11 10:28:29 -04:00
Code Issues Packages Projects Releases Wiki Activity

AP_AnalogSource: make read_average() return a float

Browse Source 
this allows it to take advantage of better than 1 bit resolution by
averaging
This commit is contained in:
Andrew Tridgell 2012-08-15 12:33:44 +10:00
parent 4b5d98e65b
commit a361a3aebd
2 changed files with 3 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
libraries/AP_AnalogSource/AP_AnalogSource_Arduino.cpp
View File

@ -104,7 +104,7 @@ uint16_t AP_AnalogSource_Arduino::read_vcc(void)
// time read_average() was called. This gives a very cheap
// filtered value, as new values are produced at 500/N Hz
// where N is the total number of analog sources
uint16_t AP_AnalogSource_Arduino::read_average(void)
float AP_AnalogSource_Arduino::read_average(void)
{
uint16_t sum;
uint8_t sum_count;
@ -119,7 +119,7 @@ uint16_t AP_AnalogSource_Arduino::read_average(void)
pins[_pin_index].sum = 0;
pins[_pin_index].sum_count = 0;
sei();
return sum / sum_count;
return sum / (float)sum_count;
}
// read with the prescaler. This uses the averaged value since

2
libraries/AP_AnalogSource/AP_AnalogSource_Arduino.h
View File

@ -32,7 +32,7 @@ class AP_AnalogSource_Arduino : public AP_AnalogSource
// read the average 16 bit ADC value since
// we last called read_average().
uint16_t read_average(void);
float read_average(void);
private:
uint8_t _pin_index;