Hi,
I am fairly new to TinyOS. I want to read the battery voltage for my
application. The values I am getting for VBatt vary like 7,8,9,10,11 for
different batteries I use. I am storing the VBatt in a float. And I am
sending the value through the serial port to display in a terminal. I am
using itoa() to convert the float value to string which is sent to the
serial port using Serial.send() - this might be incorrect because I am using
itoa() for a float value. I don't know how else to check the value of the
voltage, but I don't know how to convert float to string.
I don't know whether the problem might be this or something else.
The code I use is this:
Sensorboard.h:
#define MAKE_BAT_MONITOR_OUTPUT() sbi(DDRA, 5)
#define MAKE_BAT_ADC_INPUT() cbi(DDRF, 7)
#define SET_BAT_MONITOR() sbi(PORTA, 5)
#define CLEAR_BAT_MONITOR() cbi(PORTA, 5)
Test.nc:
TestM.BattControl->Voltage;
TestM.ADCBATT ->Voltage;
TestM.nc:
uses
{
interface ADC as ADCBATT;
interface StdControl as BattControl;
}
Implementation
{
float vBatt;
command result_t StdControl.init()
{
call BattControl.init();
return SUCCESS;
}
command result_t StdControl.start()
{
call BattControl.start();
return SUCCESS;
}
command result_t StdControl.stop()
{
call BattControl.stop();
return SUCCESS;
}
async event result_t ADCBATT.dataReady(uint16_t datas)
{
vBatt = 1.223*1024/datas;
return SUCCESS;
}
event result_t MyTimer.fired()
{
SET_BAT_MONITOR();
call ADCBATT.getData();
CLEAR_BAT_MONITOR();
itoa(vBatt, temp, 10);
call Serial.Send(temp, strlen(temp));
}
}
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