SystemBase Eddy DK, Руководство программиста

Страница: 112 / 147

Eddy DK Programmer Guide
112
Eddy-S4M GPIO Table
Section Description Number of GPIO
ADC Analog Digital Converter 2
* GPIO & User Peripheral 32
Each port in Port A, B, C can be shown as 32 GPIO ports. So GPIO ports are shown as each bit in 4 byte int variable
in program.
struct eddy_gpio {
Unsigned int value [3]; // Read/write value for each GPIO channel in Port A, B, C
Unsigned int mode [3]; // Configure read/write for each GPIO channel in Port A, B, C
Unsigned int pullup [3]; // Pullup/Pulldown when configuring write
// for each GPIO channel in Port A, B, C
Unsigned int enable [3]; // Whether to use GPIO for each GPIO channel in Port A, B, C
};
enable: 0
Æ
disable (Do not use as GPIO), 1
Æ
Enable (use as GPIO)
mode: 0
Æ
Set as input mode,, 1
Æ
Set as output mode
value: 0
Æ
Read/Write status is set to Low, 1
Æ
Read/Write status is set to High
pullup: 0
Æ
pulldown, 1
Æ
pullup