advanced micro devices amd smbus driver windows 7

I created a music visualizer application using the RGB lighting and thus a high update rate is important to get a smoothly animated visualization. I have no problem with my Windows implementation writing to 4 RAM modules as well as the motherboard module with 5 RGB zones each (5*5*3 = 75 bytes, not including overhead) at 25ms or faster update rates. In addition, I believe the timeouts in the Linux i2c-piix4.c driver are unnecessarily high and would like to have them reduced or at least a userspace-accessible option to reduce them. With the current Linux driver on kernel 4.15.0-45, this second bus is not detected and as such I cannot control the motherboard's Aura lighting. I discovered that the RAM controllers are on the first bus at 0x0B00 (which also has the SPD EEPROMs) while the motherboard's Aura controller is on the second bus at 0x0B20. This seems to be the case with at least X470 and X399 as well, according to GitLab user reports. In doing this research, I learned that the AMD X370 chipset actually has two PIIX4-compatible SMBus controllers, one at I/O 0x0B00 and one at I/O 0x0B20. I also utilized the Linux I2C code along with InpOut32 on Windows to drive the SMBus controllers from userspace and control the lighting without the official application.

I have reverse engineered much of the Aura controller's register map and have code to configure and set colors to the module from Linux. This RGB lighting system uses the SMBus interface to communicate with lighting controllers on the motherboard and RAM modules. I've been working on reverse engineering Asus and friends' Aura RGB lighting system that is found on many Asus motherboards along with DDR4 RAM modules from G.Skill, ADATA, and others.

Advanced micro devices amd smbus driver windows 7