Battery Voltage variable on EDU controller

[bear24rw]

I am trying to use the battery_voltage variable in user_routines.c but I get this error when trying to compile..

Error [1205] unknown member 'rc_analog01' in '__tag_167'

Am I missing something?

EDIT

After looking at 'ifi_default.h' i found this block of code..

  unsigned char oi_analog01, oi_analog02, oi_analog03, oi_analog04;  /*rxdata.oi_analog01*/
  unsigned char oi_analog05, oi_analog06, oi_analog07, oi_analog08;         
  unsigned char oi_analog09, oi_analog10, oi_analog11, oi_analog12;
  unsigned char oi_analog13, oi_analog14, oi_analog15, oi_analog16;
  unsigned char rc_main_batt, rc_backup_batt;

So i decided to try rc_main_batt and rc_backup_batt...
If found that if you took rxdata.rc_main_batt and applied the formula "current voltage = battery_voltage * 0.038 + 0.05; " found at the bottom of 'ifi_aliases.h' you get a value of 650.. im running the the controller off a wall adapter putting out 6 volts to i think this is pretty acurate.

Here is the code if anyone is interested..

float current_voltage = 0;
float average_voltage = 0;
int voltage_count = 0;

int i = 0;
int i2 = 0;

void Process_Data_From_Master_uP(void)
{
	Getdata(&rxdata);   /* Get fresh data from the master microprocessor. */

	current_voltage = rxdata.rc_main_batt; 		// Store current voltage
	average_voltage += current_voltage;			// Add the current voltage to the average stack

	voltage_count++;							// Increase the average stack count
	
	if (voltage_count == 39)					// If the stack is 40
	{
		average_voltage = (average_voltage / 40) * 0.038 + 0.05;	// Get the average and apply formula
		i = (int)average_voltage;									// Truncate decimals
		i2 = (int) ((average_voltage - i) * 1000);					// Subtract to get decimals only and then multiply by 1000
		printf("Average: %d.%03d \n",i,i2);							// Print the two together to make it look like a decimal

		average_voltage = 0;										// Reset the stack
		voltage_count = 0;											// Rest the counter
	}
	
	Putdata(&txdata);             /* DO NOT CHANGE! */
}

Thanks to Mark McLeod for example on how to printf floats...

EDIT
I just tried using
current_voltage = rxdata.oi_analog01;
and i get averages of 4.7 so im not sure what to think now.. can anyone clarify as to what one it is and why i get an error when i try to use the 'battery_voltage' aliase... also i just realized that the battery_voltage aliase points to 'rxdata.rc_analog01' which i cant seem to even find anywhere..

[Astronouth7303]

Are you using the EDU header files? For those two fields (rc_*_batt), I have "res01" and "res02".

In ifi_aliases.h (EDU version), it has this macro:

/*
 *-------------------------------------------------------------------------------
 *---------- Alias for Battery Voltage  -----------------------------------------
 *-------------------------------------------------------------------------------
 * current voltage = battery_voltage * 0.038 + 0.05; 
 */
#define battery_voltage rxdata.rc_analog01

Also, I'm pretty sure the formula is known to be inaccurate.

[bear24rw]

Yeah im sure im using the right header files... i got it off the ifi website three days ago from this URL http://www.ifirobotics.com/mini-rc-read-me.shtml
Has there been an update or something?