//go:build badger2350

// Chip: RP2350A (QFN-60, 30 GPIO) -> target inherits from "rp2350".
// Pin source: https://github.com/pimoroni/badger2350/blob/main/board/pins.csv
//
// NOTES (verify before first flash):
//   - POWER_EN (GPIO27) likely switches peripheral/display power.
//     Verify polarity against the schematic; pull HIGH early if needed,
//     otherwise the display will remain blank.
//   - CHARGE_STAT is connected to EXT_GPIO2 (I2C IO expander) according to pins.csv,
//     NOT the RP2350 -> intentionally not defined as a pin here.

package machine

// Crystal oscillator frequency.
const xoscFreq = 12 // MHz

// User buttons.
const (
	BUTTON_A    Pin = GPIO7
	BUTTON_B    Pin = GPIO9
	BUTTON_C    Pin = GPIO10
	BUTTON_UP   Pin = GPIO11
	BUTTON_DOWN Pin = GPIO6
	BUTTON_HOME Pin = GPIO22
	BUTTON_BOOT Pin = BUTTON_HOME

	// System / RTC-related buttons.
	BUTTON_RESET Pin = GPIO14
	BUTTON_INT   Pin = GPIO15
)

// Case LEDs (4-zone mono illumination), named CL0..CL3 in the docs.
const (
	CL0 Pin = GPIO0
	CL1 Pin = GPIO1
	CL2 Pin = GPIO2
	CL3 Pin = GPIO3

	// Convention: first zone as default LED.
	LED = CL0
)

// E-ink display (Inky), on SPI0.
const (
	INKY_BUSY Pin = GPIO16
	INKY_CS   Pin = GPIO17
	INKY_SCLK Pin = GPIO18
	INKY_MOSI Pin = GPIO19
	INKY_DC   Pin = GPIO20
	INKY_RES  Pin = GPIO21
)

// SPI0 default pins == Inky bus. SDI is unused by the EPD,
// but GPIO16 is a valid SPI0 RX line on the RP2350.
const (
	SPI0_SCK_PIN = GPIO18 // INKY_SCLK
	SPI0_SDO_PIN = GPIO19 // INKY_MOSI
	SPI0_SDI_PIN = GPIO16 // (unused by the EPD)
)

// SPI1 is not routed to any header; NoPin satisfies the machine package.
const (
	SPI1_SCK_PIN Pin = NoPin
	SPI1_SDO_PIN Pin = NoPin
	SPI1_SDI_PIN Pin = NoPin
)

// UART pins - default RP2350 UART0 mapping.
// Note: GPIO0/GPIO1 are also CL0/CL1 (case LEDs)
// Do not use UART0 and LEDs simultaneously.
const (
	UART0_TX_PIN = GPIO0
	UART0_RX_PIN = GPIO1
	UART_TX_PIN  = UART0_TX_PIN
	UART_RX_PIN  = UART0_RX_PIN
)

// I2C0 (Qwiic/STEMMA QT + RTC PCF85063A).
const (
	I2C0_SDA_PIN = GPIO4
	I2C0_SCL_PIN = GPIO5
)

// I2C1 is not routed to any header; NoPin satisfies the machine package.
const (
	I2C1_SDA_PIN Pin = NoPin
	I2C1_SCL_PIN Pin = NoPin
)

// Power / Sensing.
const (
	VBUS_DETECT Pin = GPIO12
	RTC_ALARM   Pin = GPIO13
	VBAT_SENSE  Pin = GPIO26
	POWER_EN    Pin = GPIO27
	SENSE_1V1   Pin = GPIO28

	BATTERY = VBAT_SENSE
)

var DefaultUART = UART0

// USB identifiers
const (
	usb_STRING_PRODUCT      = "Badger 2350"
	usb_STRING_MANUFACTURER = "Pimoroni"
)

var (
	usb_VID uint16 = 0x2E8A
	usb_PID uint16 = 0x0005
)