what determines the integers in PWM_LEVELS?

trailhunter · 2019-09-14T15:20:11.000Z

Hi All,

Probably best to ask here, so I’d like to increase the PWM for my fw3a-219. I think 50% PWM on FET is a bit too conservative for me, I’d like to increase it to %80, is it as simple as changing value 128 to 204 or is there more complexity to it? How are these integers generally decided? I get that its ramping but is it at the discretion of us to determine how “smooth” we want this ramping to look (so in theory, I can make it ramp like 0,10,20,50,100,128,256)?

Additionally, why is there a 0 at the end of PWM1?

// FW3A-219 config options for Anduril
#include “cfg-fw3a.h”

#undef PWM1_LEVELS
#undef PWM2_LEVELS
#undef PWM3_LEVELS
// PWM1_LEVELS is for 1×7135
#define PWM1_LEVELS 1,1,2,2,3,3,4,4,5,6,7,8,9,10,12,13,14,15,17,19,20,22,24,26,29,31,34,36,39,42,45,48,51,55,59,62,66,70,75,79,84,89,93,99,104,110,115,121,127,134,140,147,154,161,168,176,184,192,200,209,217,226,236,245,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255
// PWM2_LEVELS is for 7×7135
#define PWM2_LEVELS 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,4,6,8,10,13,15,17,19,22,24,26,29,31,34,37,39,42,45,48,51,54,57,60,64,67,70,74,77,81,85,88,92,96,100,104,108,112,116,121,125,130,134,139,143,148,153,158,163,168,173,179,184,189,195,201,206,212,218,224,230,236,243,249,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255
// PWM3_LEVELS is FET
#define PWM3_LEVELS 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,8,13,19,25,30,36,42,48,54,61,67,73,80,86,93,100,107,114,120,128

treellama · 2019-09-14T16:09:02.000Z

There’s a python script in TK’s bin directory that calculates levels based on a number of factors. You can use it to generate new ramps.

Cereal_killer · 2019-09-14T16:11:46.000Z

The zero at the end is because it was determined that trying to keep the single 7135 on at max was actually detrimental to output.

trailhunter · 2019-09-14T16:37:45.000Z

Thank you guys