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#ifndef GPIO_EXPANDER_H
#define GPIO_EXPANDER_H
#include <stdint.h>
#include "esp_check.h"
#include "esp_err.h"
#include "driver/i2c.h"
#define PCA8575_ADDRESS (0x20)
#define PCA8575_TIMEOUT (5)
namespace gay_ipod {
/**
* PCA8575
*/
class GpioExpander {
public:
GpioExpander();
~GpioExpander();
esp_err_t Write(void);
esp_err_t Read(void);
bool charge_power_ok(void);
bool headphone_detect(void);
uint8_t key_states(void);
enum SdMuxController {
ESP,
USB
};
void set_sd_mux(SdMuxController controller);
void set_sd_cs(bool high);
void set_display_cs(bool high);
// Not copyable or movable.
// TODO: maybe this could be movable?
GpioExpander(const GpioExpander&) = delete;
GpioExpander& operator=(const GpioExpander&) = delete;
private:
// Port A:
// 0 - audio power enable
// 1 - usb interface power enable
// 2 - display power enable
// 3 - sd card power enable
// 4 - charge power ok (active low)
// 5 - sd mux switch
// 6 - sd chip select
// 7 - display chip select
// All power switches low, chip selects high, active-low charge power high
uint8_t port_a_ = 0b11010000;
// Port B:
// 0 - 3.5mm jack detect (active low)
// 1 - dac soft mute switch
// 2 - GPIO
// 3 - GPIO
// 4 - GPIO
// 5 - GPIO
// 6 - GPIO
// 7 - GPIO
// DAC mute output low, everything else is active-low inputs.
uint8_t port_b_ = 0b11111101;
uint8_t input_a_ = 0;
uint8_t input_b_ = 0;
};
} // namespace gay_ipod
#endif
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