mirror of
https://github.com/tinygo-org/drivers.git
synced 2026-08-04 15:07:46 +00:00
ili9341: avoid heap allocations
This commit is contained in:
sago35
Ron Evans
+52
-44
@@ -29,6 +29,33 @@ type Device struct {
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rd machine.Pin
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}
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var cmdBuf [6]byte
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var initCmd = []byte{
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0xEF, 3, 0x03, 0x80, 0x02,
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0xCF, 3, 0x00, 0xC1, 0x30,
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0xED, 4, 0x64, 0x03, 0x12, 0x81,
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0xE8, 3, 0x85, 0x00, 0x78,
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0xCB, 5, 0x39, 0x2C, 0x00, 0x34, 0x02,
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0xF7, 1, 0x20,
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0xEA, 2, 0x00, 0x00,
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PWCTR1, 1, 0x23, // Power control VRH[5:0]
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PWCTR2, 1, 0x10, // Power control SAP[2:0];BT[3:0]
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VMCTR1, 2, 0x3e, 0x28, // VCM control
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VMCTR2, 1, 0x86, // VCM control2
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MADCTL, 1, 0x48, // Memory Access Control
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VSCRSADD, 1, 0x00, // Vertical scroll zero
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PIXFMT, 1, 0x55,
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FRMCTR1, 2, 0x00, 0x18,
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DFUNCTR, 3, 0x08, 0x82, 0x27, // Display Function Control
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0xF2, 1, 0x00, // 3Gamma Function Disable
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GAMMASET, 1, 0x01, // Gamma curve selected
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GMCTRP1, 15, 0x0F, 0x31, 0x2B, 0x0C, 0x0E, 0x08, // Set Gamma
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0x4E, 0xF1, 0x37, 0x07, 0x10, 0x03, 0x0E, 0x09, 0x00,
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GMCTRN1, 15, 0x00, 0x0E, 0x14, 0x03, 0x11, 0x07, // Set Gamma
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0x31, 0xC1, 0x48, 0x08, 0x0F, 0x0C, 0x31, 0x36, 0x0F,
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}
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// Configure prepares display for use
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func (d *Device) Configure(config Config) {
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@@ -81,42 +108,15 @@ func (d *Device) Configure(config Config) {
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delay(150)
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}
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initCmd := []byte{
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0xEF, 3, 0x03, 0x80, 0x02,
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0xCF, 3, 0x00, 0xC1, 0x30,
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0xED, 4, 0x64, 0x03, 0x12, 0x81,
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0xE8, 3, 0x85, 0x00, 0x78,
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0xCB, 5, 0x39, 0x2C, 0x00, 0x34, 0x02,
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0xF7, 1, 0x20,
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0xEA, 2, 0x00, 0x00,
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PWCTR1, 1, 0x23, // Power control VRH[5:0]
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PWCTR2, 1, 0x10, // Power control SAP[2:0];BT[3:0]
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VMCTR1, 2, 0x3e, 0x28, // VCM control
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VMCTR2, 1, 0x86, // VCM control2
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MADCTL, 1, 0x48, // Memory Access Control
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VSCRSADD, 1, 0x00, // Vertical scroll zero
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PIXFMT, 1, 0x55,
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FRMCTR1, 2, 0x00, 0x18,
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DFUNCTR, 3, 0x08, 0x82, 0x27, // Display Function Control
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0xF2, 1, 0x00, // 3Gamma Function Disable
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GAMMASET, 1, 0x01, // Gamma curve selected
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GMCTRP1, 15, 0x0F, 0x31, 0x2B, 0x0C, 0x0E, 0x08, // Set Gamma
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0x4E, 0xF1, 0x37, 0x07, 0x10, 0x03, 0x0E, 0x09, 0x00,
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GMCTRN1, 15, 0x00, 0x0E, 0x14, 0x03, 0x11, 0x07, // Set Gamma
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0x31, 0xC1, 0x48, 0x08, 0x0F, 0x0C, 0x31, 0x36, 0x0F,
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}
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if config.DisplayInversion {
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initCmd = append(initCmd, []byte{
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INVON, 0x80,
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}...)
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initCmd = append(initCmd, INVON, 0x80)
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}
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initCmd = append(initCmd, []byte{
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initCmd = append(initCmd,
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SLPOUT, 0x80, // Exit Sleep
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DISPON, 0x80, // Display on
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0x00, // End of list
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}...)
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)
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for i, c := 0, len(initCmd); i < c; {
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cmd := initCmd[i]
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if cmd == 0x00 {
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@@ -267,24 +267,28 @@ func (d *Device) SetRotation(rotation Rotation) {
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case Rotation270Mirror:
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madctl = MADCTL_MX | MADCTL_MY | MADCTL_MV | MADCTL_BGR
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}
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d.sendCommand(MADCTL, []uint8{madctl})
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cmdBuf[0] = madctl
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d.sendCommand(MADCTL, cmdBuf[:1])
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d.rotation = rotation
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}
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// SetScrollArea sets an area to scroll with fixed top/bottom or left/right parts of the display
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// Rotation affects scroll direction
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func (d *Device) SetScrollArea(topFixedArea, bottomFixedArea int16) {
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d.sendCommand(VSCRDEF, []uint8{
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uint8(topFixedArea >> 8), uint8(topFixedArea),
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uint8(d.height - topFixedArea - bottomFixedArea>>8),
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uint8(d.height - topFixedArea - bottomFixedArea),
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uint8(bottomFixedArea >> 8), uint8(bottomFixedArea),
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})
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cmdBuf[0] = uint8(topFixedArea >> 8)
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cmdBuf[1] = uint8(topFixedArea)
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cmdBuf[2] = uint8(d.height - topFixedArea - bottomFixedArea>>8)
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cmdBuf[3] = uint8(d.height - topFixedArea - bottomFixedArea)
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cmdBuf[4] = uint8(bottomFixedArea >> 8)
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cmdBuf[5] = uint8(bottomFixedArea)
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d.sendCommand(VSCRDEF, cmdBuf[:6])
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}
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// SetScroll sets the vertical scroll address of the display.
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func (d *Device) SetScroll(line int16) {
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d.sendCommand(VSCRSADD, []uint8{uint8(line >> 8), uint8(line)})
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cmdBuf[0] = uint8(line >> 8)
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cmdBuf[1] = uint8(line)
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d.sendCommand(VSCRSADD, cmdBuf[:2])
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}
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// StopScroll returns the display to its normal state
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@@ -298,16 +302,20 @@ func (d *Device) setWindow(x, y, w, h int16) {
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//y += d.rowOffset
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x1 := x + w - 1
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if x != d.x0 || x1 != d.x1 {
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d.sendCommand(CASET, []uint8{
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uint8(x >> 8), uint8(x), uint8(x1 >> 8), uint8(x1),
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})
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cmdBuf[0] = uint8(x >> 8)
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cmdBuf[1] = uint8(x)
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cmdBuf[2] = uint8(x1 >> 8)
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cmdBuf[3] = uint8(x1)
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d.sendCommand(CASET, cmdBuf[:4])
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d.x0, d.x1 = x, x1
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}
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y1 := y + h - 1
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if y != d.y0 || y1 != d.y1 {
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d.sendCommand(PASET, []uint8{
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uint8(y >> 8), uint8(y), uint8(y1 >> 8), uint8(y1),
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})
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cmdBuf[0] = uint8(y >> 8)
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cmdBuf[1] = uint8(y)
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cmdBuf[2] = uint8(y1 >> 8)
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cmdBuf[3] = uint8(y1)
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d.sendCommand(PASET, cmdBuf[:4])
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d.y0, d.y1 = y, y1
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}
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d.sendCommand(RAMWR, nil)
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