| Christina Quast | 228265d | 2014-12-05 15:51:13 +0100 | [diff] [blame] | 1 | # frequ in MHz |
| 2 | f=18.432 |
| 3 | ftarg=64.0 |
| 4 | |
| 5 | # PLL range: 60 MHz <= PLL <= 130 MHz |
| 6 | # MUL range: 4 <= MUL <= 7 |
| 7 | |
| 8 | min_err_val=[1.0, 0.0] |
| 9 | min_err=f |
| 10 | |
| 11 | for mul in range(1, 8): |
| 12 | for div in range(1, 0x20): |
| 13 | err=abs((f*mul/(1.0*div)) - ftarg) |
| 14 | print(mul, div, err) |
| 15 | if(err < min_err): |
| 16 | min_err_val=[mul, div] |
| 17 | print("last minerr: %f, new minerr: %f, mul: %d, div: %d" % (min_err, err, mul, div)) |
| 18 | min_err=err |
| 19 | |
| 20 | print("MUL-DIV values:") |
| 21 | print(min_err_val) |
| 22 | print("Absolute error: %0.2f %% " % ((f*min_err_val[0]/min_err_val[1]-ftarg)/ftarg*100)) |