Quote from: CNoteFan on March 30, 2018, 08:18:34 PM

So, I'm confused by the mystic line of code in driver-baikalu.c:

Code:

msg.data[0] = (clk == 0) ? clk : ((clk / 10) % 20) + 2;

I decided to run some common settings. These resulting values in no way correlate, even if the controller board was accepting input:

mhz | ((clk / 10) % 20) + 2
-------------------------------
150   |    17
200   |    2
250   |    7
300   |    12
350   |    17
400   |    2

Perhaps someone smarter can enlighten me?

Also, I found that the following line seems to be leftover from an earlier generation of miner (PiZero_170605_V1.4.img):

Code:

miner->clock = msg.data[3] << 1;

But I'm not sure why they are bitwise left shifting it.

It seems to me like they're using a lookup table of clock settings to get actual speeds (https://bitcointalk.org/index.php?topic=2790982.msg33090927#msg33090927). If true the max speed might be 490, for a 490/440= 11% overclock (vs 440 stock x10).