610 lines
13 KiB
NASM
610 lines
13 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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; ***************************************************************************
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; defines
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.equ ILI9341_SPIMODE = (0<<SPIHW_MODE_SPEED0_BIT) | \
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(0<<SPIHW_MODE_SPEED1_BIT) | \
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(1<<SPIHW_MODE_DOUBLESPEED_BIT) | \
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(0<<SPIHW_MODE_DATAORDER_BIT) | \
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(0<<SPIHW_MODE_CPOL_BIT) | \
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(0<<SPIHW_MODE_CPHA_BIT)
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; ***************************************************************************
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; data
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.dseg
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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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; setup pins
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sbi ILI9341_RESET_DDR, ILI9341_RESET_PIN ; RESET= output
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sbi ILI9341_RESET_OUTPUT, ILI9341_RESET_PIN ; RESET= high
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sbi ILI9341_DC_DDR, ILI9341_DC_PIN ; DC = output
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sbi ILI9341_LED_DDR, ILI9341_LED_PIN ; LED = output
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cbi ILI9341_LED_OUTPUT, ILI9341_LED_PIN ; LED = low
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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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ldi r17, 0xff
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ldi r16, 0xff
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rcall ili9341Test5
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; 0bRRRRRGGGGGGBBBBB
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ldi r17, 0b11111000 ; red
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ldi r16, 0b00000000 ; red
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; rcall ILI9341_FillScreen
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rcall ili9341Test2
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; 0bRRRRRGGGGGGBBBBB
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ldi r17, 0b00000000
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ldi r16, 0b00011111 ; blue
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rcall ili9341Test3
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; 0bRRRRRGGGGGGBBBBB
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ldi r17, 0b00000111 ; green
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ldi r16, 0b11100000 ; green
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rcall ili9341Test4
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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_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
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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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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, 5
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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_FillScreen
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;
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; @param r17:r16 color
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ILI9341_FillScreen:
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push r16
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push r17
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rcall ili9341BeginSpi ; (R16, R17)
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clr r18
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clr r19
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clr r20
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clr r21
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ldi r22, LOW(ILI9341_DSP_WIDTH-1)
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ldi r23, HIGH(ILI9341_DSP_WIDTH-1)
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ldi r24, LOW(ILI9341_DSP_HEIGHT-1)
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ldi r25, HIGH(ILI9341_DSP_HEIGHT-1)
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rcall ili9341SetAddressWindow ; (R16)
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pop r19 ; color high
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pop r18 ; color low
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; start RAM write
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ldi r16, ILI9341_CMD_RAMWR
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rcall ili9341SendCommand
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ldi r24, LOW(ILI9341_DSP_HEIGHT-1)
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ldi r25, HIGH(ILI9341_DSP_HEIGHT-1)
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ILI9341_FillScreen_loopH:
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push r24
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push r25
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ldi r24, LOW(ILI9341_DSP_WIDTH)
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ldi r25, HIGH(ILI9341_DSP_WIDTH)
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ILI9341_FillScreen_loopW:
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rcall ili9341Send16BitData
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sbiw r25:r24, 1
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brne ILI9341_FillScreen_loopW
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pop r25
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pop r24
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sbiw r25:r24, 1
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brne ILI9341_FillScreen_loopH
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rcall ili9341EndSpi
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ret
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; @end
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; ---------------------------------------------------------------------------
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; @routine ILI9341_FillRect
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; @param r17:r16 color
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; @param r19:r18 X
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; @param r21:r20 Y
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; @param r23:r22 W
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; @param r25:r24 H
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ILI9341_FillRect:
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push r16
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push r17
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rcall ili9341BeginSpi ; (R16, R17)
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ldi r16, 1
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push r22
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push r23
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push r24
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push r25
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sub r22, r16 ; X1=X+W-1
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sbc r23, r16
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add r23, r16
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add r22, r18
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adc r23, r19
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sub r24, r16 ; Y1=Y+H-1
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sbc r25, r16
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add r25, r16
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add r24, r20
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adc r25, r21
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rcall ili9341SetAddressWindow ; (R16)
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pop r25
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pop r24
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pop r23
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pop r22
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pop r19 ; color high (pop from r17)
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pop r18 ; color low (pop from r16)
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sbi ILI9341_DC_OUTPUT, ILI9341_DC_PIN ; D high (send data)
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ILI9341_FillRect_loopH:
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push r24
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push r25
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mov r24, r22 ; W low
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mov r25, r23 ; W high
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ILI9341_FillRect_loopW:
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mov r16, r19 ; color high
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rcall SPIHW_MasterTransfer ; (R16)
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mov r16, r18 ; color high
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rcall SPIHW_MasterTransfer ; (R16)
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sbiw r25:r24, 1
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brne ILI9341_FillRect_loopW
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pop r25
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pop r24
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sbiw r25:r24, 1
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brne ILI9341_FillRect_loopH
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rcall ili9341EndSpi
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ret
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; @end
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; ---------------------------------------------------------------------------
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; @routine ili9341SetAddressWindow
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;
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; @param r19:r18 X0
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; @param r21:r20 Y0
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; @param r23:r22 X1
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; @param r25:r24 Y1
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; @clobbers R16
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ili9341SetAddressWindow:
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; send column address
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ldi r16, ILI9341_CMD_CASET
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rcall ili9341SendCommand
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; X0
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mov r16, r19
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rcall ili9341SendData
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mov r16, r18
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rcall ili9341SendData
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; X1
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mov r16, r23
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rcall ili9341SendData
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mov r16, r22
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rcall ili9341SendData
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; send row address
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ldi r16, ILI9341_CMD_PASET
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rcall ili9341SendCommand
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; Y0
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mov r16, r21
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rcall ili9341SendData
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mov r16, r20
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rcall ili9341SendData
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; Y1
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mov r16, r25
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rcall ili9341SendData
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mov r16, r24
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rcall ili9341SendData
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ret
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; @end
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ili9341SendCommand:
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cbi SPIHW_SS_OUTPUT, SPIHW_SS_PIN ; SS low
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cbi ILI9341_DC_OUTPUT, ILI9341_DC_PIN ; D low
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nop
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rcall SPIHW_MasterTransfer
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sbi SPIHW_SS_OUTPUT, SPIHW_SS_PIN ; SS low
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ret
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; @end
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ili9341SendData:
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cbi SPIHW_SS_OUTPUT, SPIHW_SS_PIN ; SS low
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sbi ILI9341_DC_OUTPUT, ILI9341_DC_PIN ; D high
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rcall SPIHW_MasterTransfer ; (R16)
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sbi SPIHW_SS_OUTPUT, SPIHW_SS_PIN ; SS low
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ret
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; @end
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; @param r19:18 data
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ili9341Send16BitData:
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cbi SPIHW_SS_OUTPUT, SPIHW_SS_PIN ; SS low
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sbi ILI9341_DC_OUTPUT, ILI9341_DC_PIN ; D high
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mov r16, r19
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rcall SPIHW_MasterTransfer
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mov r16, r18
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rcall SPIHW_MasterTransfer
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sbi SPIHW_SS_OUTPUT, SPIHW_SS_PIN ; SS low
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ret
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; @end
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; ---------------------------------------------------------------------------
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; @routine ili9341BeginSpi
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;
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; @clobbers r16, r17
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ili9341BeginSpi:
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ldi r16, ILI9341_SPIMODE
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ldi r17, ILI9341_DEVICENUM
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rjmp SPIHW_MasterStart ; (R18)
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; @end
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; ---------------------------------------------------------------------------
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; @routine ili9341EndSpi
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;
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; @clobbers r16
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ili9341EndSpi:
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rjmp SPIHW_MasterStop ; (R16)
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; @end
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; ---------------------------------------------------------------------------
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; @routine ili9341SendCommands
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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
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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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ili9341Test1:
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rcall ili9341BeginSpi
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ldi r16, 0x04
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cbi ILI9341_DC_OUTPUT, ILI9341_DC_PIN ; D low (send command)
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rcall SPIHW_MasterTransfer ; (R16)
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sbi ILI9341_DC_OUTPUT, ILI9341_DC_PIN ; D high (send data)
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clr r16
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; read byte 1
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rcall SPIHW_MasterTransfer ; (R16)
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; read byte 2
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rcall SPIHW_MasterTransfer ; (R16)
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; read byte 3
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rcall SPIHW_MasterTransfer ; (R16)
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; read byte 4
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rcall SPIHW_MasterTransfer ; (R16)
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rcall ili9341EndSpi ; (R16)
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ret
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; @param %0 X
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; @param %1 Y
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; @param %2 W
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; @param %3 H
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.macro M_ILI9341_FILL_RECT
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push r16
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push r17
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rcall ili9341BeginSpi ; (R16, R17)
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ldi r18, LOW(@0) ; X0
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ldi r19, HIGH(@0)
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ldi r20, LOW(@1) ; Y0
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ldi r21, HIGH(@1)
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ldi r22, LOW(@0+@2-1) ; X1
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ldi r23, HIGH(@0+@2-1)
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ldi r24, LOW(@1+@3-1) ; y1
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ldi r25, HIGH(@1+@3-1) ; y1
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rcall ili9341SetAddressWindow ; (R16)
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pop r19 ; color high
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pop r18 ; color low
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; start RAM write
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ldi r16, ILI9341_CMD_RAMWR
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rcall ili9341SendCommand
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cbi SPIHW_SS_OUTPUT, SPIHW_SS_PIN ; SS low
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sbi ILI9341_DC_OUTPUT, ILI9341_DC_PIN ; D high
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ldi r24, LOW(@3) ; height
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ldi r25, HIGH(@3)
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l_loopH_%:
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push r24
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push r25
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ldi r24, LOW(@2) ; width
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ldi r25, HIGH(@2)
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l_loopW_%:
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M_IO_WRITE SPDR, r19
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rcall SPIHW_WaitForTransferComplete ; (R16)
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M_IO_WRITE SPDR, r18
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rcall SPIHW_WaitForTransferComplete ; (R16)
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sbiw r25:r24, 1
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brne l_loopW_%
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pop r25
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pop r24
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sbiw r25:r24, 1
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brne l_loopH_%
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sbi SPIHW_SS_OUTPUT, SPIHW_SS_PIN ; SS low
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rcall ili9341EndSpi
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.endmacro
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ili9341Test2:
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M_ILI9341_FILL_RECT 10, 20, 70, 100
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ret
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ili9341Test3:
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M_ILI9341_FILL_RECT 90, 40, 70, 100
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ret
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ili9341Test4:
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M_ILI9341_FILL_RECT 40, 30, 70, 100
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ret
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ili9341Test5:
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M_ILI9341_FILL_RECT 0, 0, 319, 239
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ret
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ili9341WriteColorTable:
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rcall ili9341BeginSpi ; (R16, R17)
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ldi r16, ILI9341_CMD_COLORSET
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rcall ili9341SendCommand
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ldi r17, 32 ; send R00-R31
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clr r18
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ldi r19, 2
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rcall ili9341WriteColorTable_loop
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ldi r17, 64 ; send G00-G63
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clr r18
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ldi r19, 1
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rcall ili9341WriteColorTable_loop
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ldi r17, 32 ; send B00-B31
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clr r18
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ldi r19, 2
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rcall ili9341WriteColorTable_loop
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rcall ili9341EndSpi
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ret
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ili9341WriteColorTable_loop:
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mov r16, r18
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rcall ili9341SendData
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add r18, r19
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dec r17
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brne ili9341WriteColorTable_loop
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ret
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; @end
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ili9341InitCommands:
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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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.include "modules/lcd2/ili9341/font1.asm"
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