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st7789: improvements #824

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85b24b3
st7789: remove dependency on the machine package by using internal/pi…
deadprogram Dec 14, 2025
b561dc3
examples: switch st7789 example to use the Adafruit Clue since that d…
deadprogram Dec 14, 2025
51561d4
st7789: add Bus interface to accomodate both SPI and parallel connect…
deadprogram Dec 14, 2025
85e123e
st7789: work in progress on display refactor
deadprogram Dec 15, 2025
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8 changes: 4 additions & 4 deletions examples/st7789/main.go
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Original file line number Diff line number Diff line change
Expand Up @@ -29,10 +29,10 @@ func main() {
Mode: 0,
})
display := st7789.New(machine.SPI0,
machine.P6, // TFT_RESET
machine.P7, // TFT_DC
machine.P8, // TFT_CS
machine.P9) // TFT_LITE
machine.TFT_RESET, // TFT_RESET
machine.TFT_DC, // TFT_DC
machine.TFT_CS, // TFT_CS
machine.TFT_LITE) // TFT_LITE

display.Configure(st7789.Config{
Rotation: st7789.NO_ROTATION,
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2 changes: 1 addition & 1 deletion smoketest.sh
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Expand Up @@ -74,7 +74,7 @@ tinygo build -size short -o ./build/test.hex -target=xiao-rp2040 ./examples/ssd1
tinygo build -size short -o ./build/test.hex -target=thumby ./examples/ssd1306/
tinygo build -size short -o ./build/test.hex -target=microbit ./examples/ssd1331/main.go
tinygo build -size short -o ./build/test.hex -target=microbit ./examples/st7735/main.go
tinygo build -size short -o ./build/test.hex -target=microbit ./examples/st7789/main.go
tinygo build -size short -o ./build/test.hex -target=clue ./examples/st7789/main.go
tinygo build -size short -o ./build/test.hex -target=circuitplay-express ./examples/thermistor/main.go
tinygo build -size short -o ./build/test.hex -target=circuitplay-bluefruit ./examples/tone
tinygo build -size short -o ./build/test.hex -target=arduino-nano33 ./examples/tm1637/main.go
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8 changes: 8 additions & 0 deletions st7789/bus.go
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@@ -0,0 +1,8 @@
package st7789

// Bus is the interface that wraps the basic Tx and Transfer methods
// for communication buses like SPI or Parallel.
type Bus interface {
Tx(w, r []byte) error
Transfer(w byte) (byte, error)
}
107 changes: 57 additions & 50 deletions st7789/registers.go
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Expand Up @@ -4,56 +4,63 @@ import "tinygo.org/x/drivers"

// Registers
const (
NOP = 0x00
SWRESET = 0x01
RDDID = 0x04
RDDST = 0x09
SLPIN = 0x10
SLPOUT = 0x11
PTLON = 0x12
NORON = 0x13
INVOFF = 0x20
INVON = 0x21
DISPOFF = 0x28
DISPON = 0x29
CASET = 0x2A
RASET = 0x2B
RAMWR = 0x2C
RAMRD = 0x2E
PTLAR = 0x30
COLMOD = 0x3A
MADCTL = 0x36
MADCTL_MY = 0x80
MADCTL_MX = 0x40
MADCTL_MV = 0x20
MADCTL_ML = 0x10
MADCTL_RGB = 0x00
MADCTL_BGR = 0x08
MADCTL_MH = 0x04
RDID1 = 0xDA
RDID2 = 0xDB
RDID3 = 0xDC
RDID4 = 0xDD
FRMCTR1 = 0xB1
RGBCTRL = 0xB1
FRMCTR2 = 0xB2
PORCTRL = 0xB2
FRMCTR3 = 0xB3
INVCTR = 0xB4
DISSET5 = 0xB6
PWCTR1 = 0xC0
PWCTR2 = 0xC1
PWCTR3 = 0xC2
PWCTR4 = 0xC3
PWCTR5 = 0xC4
VMCTR1 = 0xC5
FRCTRL2 = 0xC6
PWCTR6 = 0xFC
GMCTRP1 = 0xE0
GMCTRN1 = 0xE1
GSCAN = 0x45
VSCRDEF = 0x33
VSCRSADD = 0x37
NOP = 0x00
SWRESET = 0x01
RDDID = 0x04
RDDST = 0x09
SLPIN = 0x10
SLPOUT = 0x11
PTLON = 0x12
NORON = 0x13
INVOFF = 0x20
INVON = 0x21
DISPOFF = 0x28
DISPON = 0x29
CASET = 0x2A
RASET = 0x2B
RAMWR = 0x2C
RAMRD = 0x2E
PTLAR = 0x30
VSCRDEF = 0x33
TEOFF = 0x34
TEON = 0x35
VSCRSADD = 0x37
COLMOD = 0x3A
MADCTL = 0x36
GSCAN = 0x45
PWCTRL1 = 0xD0
RDID1 = 0xDA
RDID2 = 0xDB
RDID3 = 0xDC
RDID4 = 0xDD
RAMCTRL = 0xB0
FRMCTR1 = 0xB1
RGBCTRL = 0xB1
FRMCTR2 = 0xB2
PORCTRL = 0xB2
FRMCTR3 = 0xB3
INVCTR = 0xB4
DISSET5 = 0xB6
GCTRL = 0xB7
VCOMS = 0xBB
LCMCTRL = 0xC0
PWCTR2 = 0xC1
VDVVRHEN = 0xC2
VRHS = 0xC3
VDVS = 0xC4
VMCTR1 = 0xC5
FRCTRL2 = 0xC6
PVGAMCTRL = 0xE0
NVGAMCTRL = 0xE1
PWCTR6 = 0xFC

MADCTL_RGB = 0x00
MADCTL_ROWORDER = 0x80
MADCTL_COLORDER = 0x40
MADCTL_SWAPXY = 0x20
MADCTL_SCANORDER = 0x10
MADCTL_BGR = 0x08
MADCTL_MH = 0x04

ColorRGB444 ColorFormat = 0b011
ColorRGB565 ColorFormat = 0b101
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