I've run across an issue and I'd like to recycle some code to keep the problem simple. I have a stepper motor that moves an assembly on a hyperbolic curve. I've discovered the limits to move the assembly and its limits. Using an array look up table based on its position, I want to set the limits from the lookup table. The problem:

The limits are INT and the control is in BYTE

From months gone by, I've been using this with all of my BYTE data:

HC_Gain_scaled = (((HC_GAIN_HIGH - HC_GAIN_LOW) * pot_level)) >> 8; //Average and divide by 256

HC_Gain_scaled += HC_GAIN_LOW;

Now, HC_GAIN_HIGH - HC_GAIN_LOW will be INT data and no longer BYTE

The pot level is used for control which is 00-FF (BYTE). So in this example, I can't simply divide by 65535 because the multiplier of the pot level is only a BYTE, in which lies my issue. Shifting the bits won't work, I've tried multiply by 100h and 101h and that doesn't seem to yield the right answer either.

Is there an easy way to adapt this simple statement so the pot_level from the ADC can set the problem int limits.

I've looked throught the help file of Keil and all I see is string to int, long nothing about byte. I've looked at INTPROMOTE, but I don't see the relevence since it is for porting code rules.

Can someone give me a pointer on this?

Thanks
Chris