Cincoze GEB-3301-R10, User Manual

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GP-3000 Series | User Manual
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5.3.1.4 Sample Code in C Language
5.3.1.4.1 Control of GPIO50 to GPIO57 (LED1~ LED8)
#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 GPIO 50~57 to output mode
WriteByte(AddrPort, 0xA0) // Select configuration register A0h
WriteByte(DataPort, 0xFF) // Set (bit 0~7) = 1 to select GPIO 50~57 as output
mode.
<Output Value>
WriteByte(AddrPort, 0xA1)
// Select configuration register A1h
Value = 0xXX // Set Value with range 00h~FFh
WriteByte(DataPort, Value) // Set bit 0~7=(0/1) to output GPIO 50~57 as Low or
High
<Leave the Extended Function Mode>
WriteByte(AddrPort, 0xAA)