Featured product - USB-I2C/SPI/GPIO Adapter U2C-12
| Accessories |
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| I2C Cable for U2C-12 with Clips and Crocodile |
| Documentation |
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USB-I2C/SPI/GPIO API 0.2.0 |
USB-I2C/SPI/GPIO API 0.2.0 |
Online API Documentation |
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Schematics |
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FAQ |
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| USB-IO Interface Adapter - GPIO-24 |
U2C-12 USB-I2C/SPI/GPIO Interface Adapter Users Manual
3.6.3. U2C_IoWrite()
U2C_RESULT U2C_IoRead( HANDLE hDevice, ULONG* pValue );
The U2C_IoRead() function obtains the value of the GPIO port pins.
Parameters:
- hDevice
Handle to the U2C-12 device.
- pValue
A pointer to unsigned long to be filled with the value of the GPIO pins. pValue is treated as unsigned long 0xXXCCBBAA, where CC, BB and AA correspond to the C, B and A port pins:
- AA bits 7..0 correspond to Port A pins 7..0
- BB bits 7..0 correspond to Port B pins 7..0
- CC bits 7..0 correspond to Port C pins 7..0
- XX bits 7..0 reserved
Return values:
U2C_SUCCESS
The GPIO pins state was successfully read.
U2C_HARDWARE_NOT_FOUND
U2C-12 device referenced by hDevice handle was not found.
