Spectra PowerTwin P12C-i3WL Series, Руководство пользователя

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Spectra GmbH & Co. KG User Manual
sales@spectra.de Spectra PowerTwin Pix-8xx5UE Whiskey Lake + Standard Display 98
5.1.1.4 Sample Code in C Language
5.1.1.4.1 Control of GP70 to GP77
#define AddrPort 0x4E
#define DataPort 0x4F
<Enter the Extended Function Mode>
WriteByte(AddrPort, 0x87)
WriteByte(AddrPort, 0x87)
// Must write twice to enter Extended mode
<Select Logic Device>
WriteByte(AddrPort, 0x07)
WriteByte(dataPort, 0x06)
// Select logic device 06h
<Output/Input Mode Selection>
// Set GP70 to GP77 input Mode
WriteByte(AddrPort, 0x80) // Select configuration register 80h
WriteByte(DataPort, (ReadByte(DataPort) ǀ 0x00))
// Set (bit 0~7) = 0 to select GP 70~77 as Input mode.
<Input Value>
WriteByte(AddrPort, 0x82)
// Select configuration register 82h
ReadByte(DataPort, Value) // Read bit 0~7 (0xFF)= GP70 ~77 as High.
<Leave the Extended Function Mode>
WriteByte(AddrPort, 0xAA)