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| Search found 61 matches |
| Author | Message |
|---|---|
 Topic: How to printf float32 float64.. |
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| miro Replies: 22 Views: 23928 |
 Forum: General CCS C Discussion Posted: Wed Sep 06, 2023 2:06 am Subject: How to printf float32 float64.. |
| The point is what you posted is wrong. You say:
the precise result is (win calc bcd math) 1.1192533462602198715876021987159E+03 But you have a value scaled 1E5 by 1E13. Result should be scaled ... |
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| Topic: How to printf float32 float64.. |
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| miro Replies: 22 Views: 23928 |
Forum: General CCS C Discussion Posted: Wed Sep 06, 2023 1:50 am Subject: How to printf float32 float64.. |
| ..
float32 a32, b32, c32; float64 a64, b64, c64; a32 = 157.827; b32 = 346.384; c32 = (a32 / b32) * 2.456433e3; a64 = 1 ... |
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| Topic: How to printf float32 float64.. |
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| miro Replies: 22 Views: 23928 |
Forum: General CCS C Discussion Posted: Wed Sep 06, 2023 1:14 am Subject: How to printf float32 float64.. |
| Er:
int64_t c64i = 10000000000000; c64i = (int64_t)(c64 * c64i); printf("ic64 = %Ld\n", c64i); results in: c64 = 1.1192533449572376197389544927318638656288385391E+05 ic64 = 1119253 ... |
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| Topic: Programming with PICKIT2 off the IDE |
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| miro Replies: 0 Views: 4472 |
Forum: General CCS C Discussion Posted: Thu Aug 31, 2023 11:15 am Subject: Programming with PICKIT2 off the IDE |
| For those who want to directly flash off the compiler with the PicKit2 - here is the command you may enter into the Options-> IDE-> Tools-> Command, which works fine here:
"C:\Pro ... |
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| Topic: How to printf float32 float64.. |
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| miro Replies: 22 Views: 23928 |
Forum: General CCS C Discussion Posted: Wed Aug 30, 2023 3:28 am Subject: How to printf float32 float64.. |
For example - you want to deliver a package from pointA to pointB and your pic24/dspic driving the drone wants to know where to fly.. 
printf ("\n###### DISTANCE AND INITIAL BEARI ... |
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| Topic: How to printf float32 float64.. |
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| miro Replies: 22 Views: 23928 |
Forum: General CCS C Discussion Posted: Tue Aug 29, 2023 7:15 am Subject: How to printf float32 float64.. |
| For example: sin(PI/5.0)
Wolfram Alpha Win7 calculator PCD float64 0.5877852522924731291687059546390727685976524376431459910722724807... 0.58778525229247312916870595463907 0.5877852522924738 |
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| Topic: How to printf float32 float64.. |
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| miro Replies: 22 Views: 23928 |
Forum: General CCS C Discussion Posted: Tue Aug 29, 2023 6:09 am Subject: How to printf float32 float64.. |
| The win7/10 calculator is pretty precise, it uses 34 digits decimal math, afaik. Of course there is Wolfram Alpha and others with arbitrary precision you may compare with.
I messed a lot with double ... |
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| Topic: How to printf float32 float64.. |
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| miro Replies: 22 Views: 23928 |
Forum: General CCS C Discussion Posted: Tue Aug 29, 2023 1:57 am Subject: How to printf float32 float64.. |
| ..and it is not only the issue with too many digits in their printf, but the precision trouble is there as well.
For example: .. int64_t c64i = 10000000000000; c64i = (int64_t)(c64 * c64i); pr ... |
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| Topic: How to printf float32 float64.. |
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| miro Replies: 22 Views: 23928 |
Forum: General CCS C Discussion Posted: Mon Aug 28, 2023 11:37 am Subject: How to printf float32 float64.. |
| Yep, I think the "f" did the same (I may retest that again).
Tried to format with %m.ne but the same. There is also f48, but the math results I got with a test were off, thus I do not both ... |
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| Topic: How to printf float32 float64.. |
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| miro Replies: 22 Views: 23928 |
Forum: General CCS C Discussion Posted: Mon Aug 28, 2023 8:44 am Subject: How to printf float32 float64.. |
| ..
float32 a32, b32, c32; float64 a64, b64, c64; a32 = 157.827; b32 = 346.384; c32 = (a32 / b32) * 2.456433e3; a64 = 1 ... |
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| Topic: How to printf float32 float64.. |
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| miro Replies: 22 Views: 23928 |
Forum: General CCS C Discussion Posted: Mon Aug 28, 2023 8:06 am Subject: How to printf float32 float64.. |
| Hi, we want to printf the float32/64 values and are coping with a problem.
Whatever we do the results are aprox 50 char long strings, basically a correct value, but the printf adds aprox 30-40 chars, ... |
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| Topic: COS SIN broken? |
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| miro Replies: 11 Views: 15495 |
Forum: General CCS C Discussion Posted: Sun Jul 05, 2015 11:07 am Subject: COS SIN broken? |
Reducing the range is matter of "highest precision", not stopping to work 
The ccs compiler is the only one I know where cos/sin stop working with arguments larger a few hundreds of radia ... |
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| Topic: COS SIN broken? |
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| miro Replies: 11 Views: 15495 |
Forum: General CCS C Discussion Posted: Sun Jul 05, 2015 9:26 am Subject: COS SIN broken? |
| It seems the trick with getting COS into radian quadrants is quite limited in its scope - see the math.h (lines 1188-1197):
quad = (unsigned int8)(x * PI_DIV_BY_TWO_INV); // ... |
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| Topic: COS SIN broken? |
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| miro Replies: 11 Views: 15495 |
Forum: General CCS C Discussion Posted: Sun Jul 05, 2015 8:18 am Subject: COS SIN broken? |
| May be I am doing something wrong, but for these arguments I get following COS values (pcwhd 5.048 and others most probably):
rad COS(rad) 3.7129E+02 8.3146E-01 3.7738E+02 9.2388E ... |
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| Topic: dspic33fj - fft.h and adc dma |
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| miro Replies: 0 Views: 4823 |
Forum: General CCS C Discussion Posted: Thu Jun 18, 2015 7:18 am Subject: dspic33fj - fft.h and adc dma |
| Hi, after a long evening elaborating a piece of code which worked fine in past I share my lesson learned:
1. the code does fft with adc->dma_buffers-ping-pong 2. I had to place the stack at a fre ... |
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