// SdFromFile creates a new SdCardPeripheral based on the contents of a file.
func NewSdCardPeripheral(pm spi.PinMap) (sd *SdCardPeripheral, err error) {
sd = &SdCardPeripheral{
card: newSdCard(),
spi: spi.NewSlave(pm),
}
// two busy bytes, then ready.
sd.card.queueMisoBytes(0x00, 0x00, 0xFF)
return
}
func NewDisplay(pm spi.PinMap) (display *Display, err error) {
img := createImage()
display = &Display{
spi: spi.NewSlave(pm),
img: img,
startCol: 0,
endCol: width - 1,
startRow: 0,
endRow: height - 1,
}
return
}