ctdo
/
crashtest-r0ket
16
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

added some filtering for the voltage reading

This commit is contained in:
schneider 2012-01-19 23:01:00 +01:00
parent eee6ae55f0
commit d9b7a2c6bd
1 changed files with 15 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

24
firmware/basic/voltage.c
View File

@ -3,26 +3,31 @@
#include "basic/basic.h"
#include "funk/nrf24l01p.h"
static uint32_t voltage=5000;
#define VOLTAGE_SAMPLES 8
static uint32_t voltage=5000*VOLTAGE_SAMPLES;
static uint8_t chrg=1;
void VoltageCheck(void){
uint32_t v;
chrg=gpioGetValue(RB_PWR_CHRG);
//slow down the adc for our high impedance volatage devider
//slow down the adc for our high impedance voltage devider
ADC_AD0CR = ((CFG_CPU_CCLK / SCB_SYSAHBCLKDIV) / 100000 - 1 ) << 8;
voltage = adcRead(1);
v = adcRead(1);
//speed it up again
ADC_AD0CR = ((CFG_CPU_CCLK / SCB_SYSAHBCLKDIV) / 1000000 - 1 ) << 8;
voltage *= 10560;
voltage /= 1024;
v *= 10560;
v /= 1024;
//add the drop over the voltage switch
voltage += 50;
v += 50;
voltage -= voltage/VOLTAGE_SAMPLES;
voltage += v;
//battery is assumed empty if the volatge falls bellow 3.5V
if( voltage < 3500 ){
if( voltage < (3500*VOLTAGE_SAMPLES) ){
//if( voltage < 3500 ){
nrf_off();
gpioSetValue (RB_PWR_GOOD, 0);
gpioSetValue (RB_LCD_BL, 0);
@ -35,7 +40,8 @@ void VoltageCheck(void){
};
uint32_t GetVoltage(void){
return voltage;
return voltage/8;
//return voltage;
};
uint8_t GetChrgStat(void){