Portwell RUBY-D812-Q470E, User Manual

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RUBY-D812-Q470E
Copyright © Portwell 2021 RUBY-D812-Q470E User's Guide 32
Outportb(SIO_DATA_PORT, val); // Write back WDT status
Outportb(SIO_INDEX_PORT, 0xAA); // Lock SIO
5.2 GPIO Signal
GPIO Setting
1. Get SMBUS_BASE address
val = 0x8000FC20;
Outportd(0xCF8, val);
val = Inportd(0xCFC);
SMBUS_BASE = val & 0x0000FFE0;
2. Set GPIOn to GPI or GPO
Status = Inportb(SMBU 0x00);
Outportb(SMBU 0x00, Status); // SMBus Clear Status
Outportb(SMBU 0x02, 0x08); // Set SMBus CMD to Byte Data
Outportb(SMBU 0x04, 0x41); // Set SMBus Slave Address to 0x40 and excute Read flow
Outportb(SMBU 0x03, 0x00); // Set SMBus Reg
val = Inportb(SMBU 0x02);
val = val | 0x40;
Outportb(SMBU 0x02, val); // Excute SMBus Command