279 lines
6.5 KiB
NASM
279 lines
6.5 KiB
NASM
; ***************************************************************************
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; copyright : (C) 2025 by Martin Preuss
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; email : martin@libchipcard.de
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;
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; ***************************************************************************
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; * This file is part of the project "AqHome". *
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; * Please see toplevel file COPYING of that project for license details. *
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; ***************************************************************************
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#ifndef AQH_AVR_ILI9341_MAIN_ASM
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#define AQH_AVR_ILI9341_MAIN_ASM
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; generally we use the following parameters here:
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; @param r1:r0 background color
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; @param r3:r2 foreground color
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; @param r5:r4 X0
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; @param r7:r6 Y0
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; @param r9:r8 X1/W
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; @param r11:r10 Y1/H
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; @param r13:r12 source data width in bytes (for bit blit, i.e. byte offset from
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; one source data line to the next)
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; ***************************************************************************
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; data
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.dseg
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;ILI9341_buffer: .byte 128
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; ***************************************************************************
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; code
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.cseg
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; ---------------------------------------------------------------------------
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; @routine ILI9341_Init @global
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ILI9341_Init:
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rcall ILI9341IoInit
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rcall ILI9341_Reset
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rcall ILI9341_LeaveSleepMode
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ldi r16, 0xff
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rcall ILI9341_SetBacklight
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sec
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ret
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; @end
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; ---------------------------------------------------------------------------
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; @routine ILI9341_Fini @global
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ILI9341_Fini:
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ret
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; @end
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; ---------------------------------------------------------------------------
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; @routine ili9341_SendCommands
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;
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; @clobbers r16
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; Z=byte pointer to command list (as for LPM)
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ili9341SendCommands:
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rcall ili9341BeginSpi ; (R16, R17)
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ili9341SendCommands_loop1:
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lpm r16, Z+ ; read command
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lpm r18, Z+ ; read number of args
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cpi r18, 0xff ; end?
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breq ili9341SendCommands_end
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rcall ili9341SendCommand
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mov r19, r18
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andi r19, 1 ; if 1: need to skip filler byte
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tst r18
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breq ili9341SendCommands_loop1 ; no args, next command
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ili9341SendCommands_loop2:
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lpm r16, Z+
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rcall ili9341SendData ; (R16)
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dec r18
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brne ili9341SendCommands_loop2
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add zl, r19 ; possibly skip filler byte
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adc zh, r19
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sub zh, r19
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rjmp ili9341SendCommands_loop1
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ili9341SendCommands_end:
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rcall ili9341EndSpi ; (R16)
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ret
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; @end
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; ---------------------------------------------------------------------------
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; @routine ILI9341_Reset @global
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; @clobbers (R22)
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ILI9341_Reset:
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cbi ILI9341_RESET_OUTPUT, ILI9341_RESET_PIN
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ldi r16, 100
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rcall Utils_WaitForMilliSecs
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sbi ILI9341_RESET_OUTPUT, ILI9341_RESET_PIN
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ldi r16, 50
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rcall Utils_WaitForMilliSecs
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ldi zl, LOW(ili9341InitCommands*2)
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ldi zh, HIGH(ili9341InitCommands*2)
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rcall ili9341SendCommands
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ldi r16, 120
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rcall Utils_WaitForMilliSecs
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rcall ili9341BeginSpi
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ldi r16, 0x29 ; display on
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rcall ili9341SendCommand
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rcall ili9341EndSpi
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ldi r16, 120
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rcall Utils_WaitForMilliSecs
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ret
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; @end
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; ---------------------------------------------------------------------------
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; @routine ILI9341_SetBacklight @global
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;
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; @param r16 0=off, on otherwise
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; @clobbers r16, r17
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ILI9341_SetBacklight:
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tst r16
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brne ILI9341_SetBacklight_on
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cbi ILI9341_LED_OUTPUT, ILI9341_LED_PIN
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ret
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ILI9341_SetBacklight_on:
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sbi ILI9341_LED_OUTPUT, ILI9341_LED_PIN
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ret ; DEBUG
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push r16
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rcall ili9341BeginSpi
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ldi r16, ILI9341_CMD_WRITECTLDISPLAY
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rcall ili9341SendCommand
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; ldi r16, 0b00100100
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ldi r16, 0x24
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rcall ili9341SendData
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ldi r16, ILI9341_CMD_SETDSPBRIGHTNESS
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rcall ili9341SendCommand
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pop r16
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rcall ili9341SendData
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ldi r16, 0xbe
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rcall ili9341SendCommand
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ldi r16, 0x0f
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rcall ili9341SendData
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rcall ili9341EndSpi
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ret
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; @end
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ILI9341_LeaveSleepMode:
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rcall ili9341BeginSpi
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ldi r16, 0x11 ; sleep out
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rcall ili9341SendCommand
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rcall ili9341EndSpi
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ldi r16, 120
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rcall Utils_WaitForMilliSecs
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rcall ili9341BeginSpi
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ldi r16, 0x38 ; idle mode off
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rcall ili9341SendCommand
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rcall ili9341EndSpi
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rcall ili9341BeginSpi
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ldi r16, 0x13 ; normal mode on
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rcall ili9341SendCommand
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rcall ili9341EndSpi
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ret
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; @end
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ili9341InitCommands:
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#if 1
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; display off
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.db 0x28, 0
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; PowerCtlA
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.db 0xcb, 5, 0x39, 0x2C, 0x00, 0x34, 0x02, 0x00
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; PowerCtlB
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.db 0xcf, 3, 0x00, 0xC1, 0x30, 0x00
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; DriverTimingCtlA
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.db 0xe8, 3, 0x85, 0x00, 0x78, 0x00
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; DriverTimingCtlB
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.db 0xea, 2, 0x00, 0x00
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; _PowerSeqCtl
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.db 0xed, 4, 0x64, 0x03, 0x12, 0x81
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; PumpRatioCtl
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.db 0xf7, 1, 0x20, 0x00
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; PowerCtl1
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.db 0xc0, 1, 0x23, 0x00 ; lookup!
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; PowerCtl2
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.db 0xc1, 1, 0x10, 0x00 ; lookup!
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; VomCtl1
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.db 0xc5, 2, 0x3e, 0x28 ; lookup!
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; VomCtl2
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.db 0xc7, 1, 0x86, 0x00 ; lookup!
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; ColMod
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.db 0x3A, 1, 0x55, 0x00 ; DPI=16bits/pixel, DBI=16bits/pixel
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; FrameRateCtl
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.db 0xb1, 2, 0x00, ILI9341_FRAMERATE_79_HZ
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; DspFnCtl
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.db 0xb6, 3, 0x08, 0x82, 0x27, 0x00
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; GammaCurve
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.db 0x26, 1, 0x01, 0x00
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; PosGamma
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.db 0xe0, 15
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.db 0x0F, 0x31, 0x2B, 0x0C, 0x0E, 0x08, 0x4E, 0xF1
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.db 0x37, 0x07, 0x10, 0x03, 0x0E, 0x09, 0x00, 0x00
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; NegGamma
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.db 0xe1, 15
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.db 0x00, 0x0E, 0x14, 0x03, 0x11, 0x07, 0x31, 0xC1
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.db 0x48, 0x08, 0x0F, 0x0C, 0x31, 0x36, 0x0F, 0x00
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; memory access control (use ILI9341_MADCTL_MV to flip X/Y)
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; MMMMBM
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; YXVLGH00
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.db 0x36, 1, 0b11101000, 0x00
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; normal mode on
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; .db 0x13, 0
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; end
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.db 0xff, 0xff
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#else
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.db 0xef, 3, 0x03, 0x80, 0x02, 0x00
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.db 0xcf, 3, 0x00, 0xc1, 0x30, 0x00
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.db 0xed, 4, 0x64, 0x03, 0x12, 0x81
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.db 0xe8, 3, 0x85, 0x00, 0x78, 0x00
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.db 0xcb, 5, 0x39, 0x2c, 0x00, 0x34, 0x02, 0x00
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.db 0xf7, 1, 0x20, 0x00
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.db 0xea, 2, 0x00, 0x00
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.db 0xc0, 1, 0x23, 0x00
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.db 0xc1, 1, 0x10, 0x00
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.db 0xc5, 2, 0x3e, 0x28
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; .db 0xc7, 1, 0x86, 0x00
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.db 0xc7, 1, 0xb7, 0x00
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.db 0x36, 1, 0b11101000, 0x00
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.db 0x3a, 1, 0x55, 0x00
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.db 0xb1, 2, 0x00, ILI9341_FRAMERATE_100_HZ
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.db 0xb6, 3, 0x08, 0x82, 0x27, 0x00
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.db 0xf2, 1, 0x00, 0x00
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.db 0x26, 1, 0x01, 0x00
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.db 0xe0, 15, 0x0f, 0x31, 0x2b, 0x0c, 0x0e, 0x08, 0x4e, 0xf1
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.db 0x37, 0x07, 0x10, 0x03, 0x0e, 0x09, 0x00, 0x00
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.db 0xe1, 15, 0x00, 0x0e, 0x14, 0x03, 0x11, 0x07, 0x31, 0xc1
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.db 0x48, 0x08, 0x0f, 0x0c, 0x31, 0x36, 0x0f, 0x00
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; end
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.db 0xff, 0xff
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#endif ; AQH_AVR_ILI9341_MAIN_ASM
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