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This commit is contained in:
Harald Pichler 2013-08-20 13:02:56 +02:00
parent bd45ee7aea
commit ae732f4636
2 changed files with 63 additions and 0 deletions
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55
platform/osd-merkur/dev/batmon.c Normal file
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#include "contiki.h"
#include "batmon.h"
#include <util/delay.h>
int8_t batmon_init()
{
return 0;
}
int8_t batmon_get_voltage(uint16_t* voltage)
{
uint16_t volt = 0;
uint16_t resolution = 75;
uint16_t offset = 2550;
int8_t ctr = 0;
BATMON = 0 | BV(BATMON_HR);
_delay_us(2);
if(BATMON & BV(BATMON_OK))
{
// voltage above 2.550 V
resolution = 75;
offset = 2550;
for(ctr=15; ctr>=0; ctr--)
{
BATMON = (BATMON & 0xF0) | (ctr);
_delay_us(2);
if(BATMON & BV(BATMON_OK)) break;
}
}
else
{
// voltage below 2.550 V
resolution = 50;
offset = 1700;
BATMON &= ~BV(BATMON_HR);
for(ctr=15; ctr>=0; ctr--)
{
BATMON = (BATMON & 0xF0) | (ctr);
_delay_us(2);
if(BATMON & BV(BATMON_OK)) break;
}
}
volt = resolution*ctr+offset;
*voltage=volt;
return 0;
}

8
platform/osd-merkur/dev/batmon.h Normal file
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#ifndef BATMON_H_
#define BATMON_H_
int8_t batmon_init();
int8_t batmon_get_voltage(uint16_t* voltage);
#endif /* BATMON_H_ */