mirror of https://github.com/mgba-emu/mgba.git
65 lines
1.1 KiB
C
65 lines
1.1 KiB
C
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#ifndef GBA_GPIO_H
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#define GBA_GPIO_H
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#include <stdint.h>
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#define IS_GPIO_REGISTER(reg) ((reg) == GPIO_REG_DATA || (reg) == GPIO_REG_DIRECTION || (reg) == GPIO_REG_CONTROL)
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enum GPIODevice {
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GPIO_NONE = 0,
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GPIO_RTC = 1,
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GPIO_RUMBLE = 2,
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GPIO_LIGHT_SENSOR = 4,
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GPIO_GYRO = 8
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};
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enum GPIORegister {
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GPIO_REG_DATA = 0xC4,
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GPIO_REG_DIRECTION = 0xC6,
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GPIO_REG_CONTROL = 0xC8
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};
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enum GPIODirection {
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GPIO_WRITE_ONLY = 0,
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GPIO_READ_WRITE = 1
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};
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struct GBARTC {
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// TODO
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};
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struct GBACartridgeGPIO {
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int gpioDevices;
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enum GPIODirection direction;
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uint16_t* gpioBase;
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union {
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struct {
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unsigned p0 : 1;
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unsigned p1 : 1;
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unsigned p2 : 1;
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unsigned p3 : 1;
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};
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uint16_t pinState;
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};
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union {
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struct {
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unsigned dir0 : 1;
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unsigned dir1 : 1;
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unsigned dir2 : 1;
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unsigned dir3 : 1;
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};
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uint16_t pinDirection;
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};
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struct GBARTC rtc;
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};
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void GBAGPIOInit(struct GBACartridgeGPIO* gpio, uint16_t* gpioBase);
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void GBAGPIOWrite(struct GBACartridgeGPIO* gpio, uint32_t address, uint16_t value);
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void GBAGPIOInitRTC(struct GBACartridgeGPIO* gpio);
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#endif
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