| # frequ in MHz |
| f=18.432 |
| ftarg=64.0 |
| |
| # PLL range: 60 MHz <= PLL <= 130 MHz |
| # MUL range: 4 <= MUL <= 7 |
| |
| min_err_val=[1.0, 0.0] |
| min_err=f |
| |
| for mul in range(1, 8): |
| for div in range(1, 0x20): |
| err=abs((f*mul/(1.0*div)) - ftarg) |
| print(mul, div, err) |
| if(err < min_err): |
| min_err_val=[mul, div] |
| print("last minerr: %f, new minerr: %f, mul: %d, div: %d" % (min_err, err, mul, div)) |
| min_err=err |
| |
| print("MUL-DIV values:") |
| print(min_err_val) |
| print("Absolute error: %0.2f %% " % ((f*min_err_val[0]/min_err_val[1]-ftarg)/ftarg*100)) |