| ??? 09/08/08 14:15 Read: times |
#158069 - Take a look at the ranges Responding to: ???'s previous message |
Taking a look at the number range you want to get to will give some insight to how to scale with ints. You want decminal numbers 0-255 to scale to decimal numbers 1192 to 2216. The range of your incoming data is 256 levels and the range of your out doing data is 1025 levels, sounds like an almost perfect match for times 4 + an offset.
HC_Gain_scaled = (pot_level * 4) + HC_GAIN_LOW; Now this will make it so 255 only scales to 2122 instead of 2216. If you need these last 4 you can shift it up by 2 and leave off the bottom 2 and top 2 perhaps. In that case your range would be 1194 to 2214. Otherwise you might want to move up to using longs as suggested by Christoph. |
| Topic | Author | Date |
| Scale offset using ints by byte position location | 01/01/70 00:00 | |
| Does type casting make sense here?... | 01/01/70 00:00 | |
| Show us more......... | 01/01/70 00:00 | |
| Here are defs and original function | 01/01/70 00:00 | |
| ints, at leastin Keil, at 16 bits wide. | 01/01/70 00:00 | |
| Christoph, | 01/01/70 00:00 | |
| That makes things clearer. | 01/01/70 00:00 | |
| A detail | 01/01/70 00:00 | |
| Take a look at the ranges | 01/01/70 00:00 | |
| Brett, that is helpful, I should add.... | 01/01/70 00:00 | |
| No floating-point math required. | 01/01/70 00:00 | |
| Its working but I have a question on theory | 01/01/70 00:00 | |
| Rounding instead of truncate | 01/01/70 00:00 | |
| oh, that is interesting | 01/01/70 00:00 | |
Russ' comment is right, though. | 01/01/70 00:00 |