Equivalent of getPowerStatus() in C SDK?

SDK Feature Requests
,
1

Via the C SDK, I would like to detect if the Playdate is currently charging. In the Lua SDK, I can see the Lua function getPowerStatus() and based on this related forum discussion here, it seems that this is exactly what I need.

Unfortunately, I cannot find the equivalent in the C SDK. When looking at pd_api_sys.h, all I can see is the pair of

struct playdate_sys
{
// ...
	// 1.4
	float (*getBatteryPercentage)(void);
	float (*getBatteryVoltage)(void);

Am I missing something? Is there a way to access the same information from C (without going through playdate->lua->callFunction)?

If not, I would like to request the addition of

typedef enum
{
    kPDPowerStatusCharging = (1<<0),
    kPDPowerStatusUsb      = (1<<1),
    kPDPowerStatusScrews   = (1<<2),
} PDPowerStatus;

// ...
struct playdate_sys
{
// ...
    PDPowerStatus (*getPowerStatus)(void);

Thank you!

1 Like
2

In your proposal the function would return a bitmask so that screws and usb could both be active, right? And 0 is battery power?

3

Yes, that was my intention. I tried to model this after PDButtons

typedef enum
{
	kButtonLeft		= (1<<0),
	kButtonRight	= (1<<1),
	kButtonUp		= (1<<2),
	kButtonDown		= (1<<3),
	kButtonB		= (1<<4),
	kButtonA		= (1<<5)
} PDButtons;

// ..
struct playdate_sys
{
// ...
	void (*getButtonState)(PDButtons* current, PDButtons* pushed, PDButtons* released);

and how I interpret the Lua documentation for playdate.getPowerPowerStatus():

playdate.getPowerStatus()

Returns a table holding booleans with the following keys:

  • charging: The battery is actively being charged
  • USB: There is a powered USB cable connected
  • screws: There is 5V being applied to the corner screws (via the dock, for example)