| ??? 09/08/08 07:17 Read: times |
#158039 - ints, at leastin Keil, at 16 bits wide. Responding to: ???'s previous message |
Chris Bertrand said:
HC_Gain_scaled = (((HC_GAIN_HIGH - HC_GAIN_LOW) * (uint)pot_level)) >> 16; //Average and divide by 65535 ints, at least in Keil C51, are 16 bits wide, so shifting them 16 bits to the right will result in 0x0000. Also, since HC_GAIN_LOW and HC_GAIN_HIGH are ints (by default, you can make them something else with the appropriate specifier), the cast should have no effect since pot_level is implicitly cast to an int. I'm still not quite sure what problem you are trying to describe. Can you give an example (code, values, expected output, actual output)? That would be helpful for figuring things out. |
| 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 |