337 lines
8.2 KiB
NASM
337 lines
8.2 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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; @routine ili9341SetAddressWindow
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;
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; @param r5:r4 X0
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; @param r7:r6 Y0
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; @param r9:r8 W
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; @param r11:r10 H
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; @clobbers R16, r20, r21
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ili9341SetAddressWindow:
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; calc XEnd (=X+W-1)
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mov r20, r8
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mov r21, r9
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add r20, r4
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adc r21, r5
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subi r20, 1
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sbci r21, 0
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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, r5
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rcall ili9341SendData
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mov r16, r4
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rcall ili9341SendData
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; X1
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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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; calc YEnd (=Y+H-1)
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mov r20, r10
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mov r21, r11
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add r20, r6
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adc r21, r7
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subi r20, 1
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sbci r21, 0
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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, r7
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rcall ili9341SendData
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mov r16, r6
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rcall ili9341SendData
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; Y1
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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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ret
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; @end
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; ---------------------------------------------------------------------------
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; @routine ILI9341_FillRect
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; @param r3:r2 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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ILI9341_FillRect:
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push r15
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in r15, SREG
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cli
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rcall ili9341BeginSpi ; (R16, R17)
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rcall ili9341SetAddressWindow ; (R16, r20, r21)
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mov r18, r2 ; color
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mov r19, r3
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mov r22, r10 ; H low
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mov r23, r11 ; H high
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ldi r16, ILI9341_CMD_RAMWR ; start writing ro RAM
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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 (DATA)
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ILI9341_FillRect_loopH:
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mov r24, r8 ; W low
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mov r25, r9 ; W high
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ILI9341_FillRect_loopW:
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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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sbiw r25:r24, 1
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brne ILI9341_FillRect_loopW
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mov r24, r22 ; H low
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mov r25, r23 ; H high
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sbiw r25:r24, 1 ; dec
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mov r22, r24 ; save in r23:r22
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mov r23, r25
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brne ILI9341_FillRect_loopH
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sbi SPIHW_SS_OUTPUT, SPIHW_SS_PIN ; SS high
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rcall ili9341EndSpi
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out SREG, r15
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pop r15
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ret
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; @end
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; ---------------------------------------------------------------------------
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; @routine ili9341BitBlit
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; @param r5:r4 X (dest)
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; @param r7:r6 Y (dest)
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; @param r9:r8 W
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; @param r11:r10 H
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; @param X source data pointer (RAM)
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; @clobbers r16, r22, r23, r24, r25, X (r17, r20, r21)
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ili9341BitBlit:
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push r15
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in r15, SREG
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cli
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rcall ili9341BeginSpi ; (r16, r17)
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rcall ili9341SetAddressWindow ; (R16, R20, R21)
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ldi r16, ILI9341_CMD_RAMWR ; start writing ro RAM
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rcall ili9341SendCommand
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mov r22, r10
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mov r23, r11
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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 (DATA)
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ili9341BitBlit_loopH:
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mov r24, r8
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mov r25, r9
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ili9341BitBlit_loopW:
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ld r18, X+
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ld r19, X+
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mov r16, r19
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rcall SPIHW_MasterTransfer ; (R16)
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mov r16, r18
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rcall SPIHW_MasterTransfer ; (R16)
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sbiw r25:r24, 1
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brne ili9341BitBlit_loopW
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mov r24, r22
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mov r25, r23
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sbiw r25:r24, 1
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mov r22, r24
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mov r23, r25
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brne ili9341BitBlit_loopH
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sbi SPIHW_SS_OUTPUT, SPIHW_SS_PIN ; SS high
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rcall ili9341EndSpi ; (R16)
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out SREG, r15
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pop r15
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ret
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; @end
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; ---------------------------------------------------------------------------
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; @routine ili9341BitBlitStretch2
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; @param r5:r4 X (dest)
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; @param r7:r6 Y (dest)
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; @param r9:r8 W
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; @param r11:r10 H
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; @param X source data pointer (RAM)
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; @clobbers r16, r22, r23, r24, r25, X (r17, r18, r19, r20, r21)
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ili9341BitBlitStretch2:
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push r15
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in r15, SREG
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cli
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push r8
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push r9
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push r10
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push r11
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; width
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lsl r8 ; x2
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rol r9
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; height
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lsl r10 ; x2
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rol r11
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rcall ili9341BeginSpi ; (r16, r17)
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rcall ili9341SetAddressWindow ; (R16, R20, R21)
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pop r11
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pop r10
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pop r9
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pop r8
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ldi r16, ILI9341_CMD_RAMWR ; start writing ro RAM
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rcall ili9341SendCommand
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mov r22, r10
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mov r23, r11
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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 (DATA)
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ldi r17, 2
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ili9341BitBlitStretch2_loopH:
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mov r20, xl ; preserve for next run
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mov r21, xh
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rcall ili9341BitBlitStretchNWriteLine ; (r16, r17, r18, r19, r24, r25, X)
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mov xl, r20
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mov xh, r21
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rcall ili9341BitBlitStretchNWriteLine ; (r16, r17, r18, r19, r24, r25, X)
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mov r24, r22
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mov r25, r23
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sbiw r25:r24, 1
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mov r22, r24
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mov r23, r25
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brne ili9341BitBlitStretch2_loopH
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sbi SPIHW_SS_OUTPUT, SPIHW_SS_PIN ; SS high
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rcall ili9341EndSpi ; (R16)
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out SREG, r15
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pop r15
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ret
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; @end
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; ---------------------------------------------------------------------------
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; @routine ili9341BitBlitStretch4
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; @param r5:r4 X (dest)
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; @param r7:r6 Y (dest)
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; @param r9:r8 W
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; @param r11:r10 H
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; @param X source data pointer (RAM)
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; @clobbers r16, r22, r23, r24, r25, X (r17, r20, r21)
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ili9341BitBlitStretch4:
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push r15
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in r15, SREG
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cli
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push r8
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push r9
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push r10
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push r11
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; width
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lsl r8 ; x2
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rol r9
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lsl r8 ; x4
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rol r9
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; height
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lsl r10 ; x2
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rol r11
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lsl r10 ; x4
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rol r11
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rcall ili9341BeginSpi ; (r16, r17)
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rcall ili9341SetAddressWindow ; (R16, R20, R21)
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pop r11
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pop r10
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pop r9
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pop r8
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ldi r16, ILI9341_CMD_RAMWR ; start writing ro RAM
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rcall ili9341SendCommand
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mov r22, r10
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mov r23, r11
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ldi r17, 4
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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 (DATA)
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ili9341BitBlitStretch4_loopH:
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mov r20, xl ; preserve for next run
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mov r21, xh
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rcall ili9341BitBlitStretchNWriteLine ; (r16, r17, r18, r19, r24, r25, X)
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mov xl, r20
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mov xh, r21
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rcall ili9341BitBlitStretchNWriteLine ; (r16, r17, r18, r19, r24, r25, X)
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mov xl, r20
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mov xh, r21
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rcall ili9341BitBlitStretchNWriteLine ; (r16, r17, r18, r19, r24, r25, X)
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mov xl, r20
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mov xh, r21
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rcall ili9341BitBlitStretchNWriteLine ; (r16, r17, r18, r19, r24, r25, X)
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mov r24, r22
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mov r25, r23
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sbiw r25:r24, 1
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mov r22, r24
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mov r23, r25
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brne ili9341BitBlitStretch4_loopH
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sbi SPIHW_SS_OUTPUT, SPIHW_SS_PIN ; SS high
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rcall ili9341EndSpi ; (R16)
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out SREG, r15
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pop r15
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ret
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; @end
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; ---------------------------------------------------------------------------
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; @routine ili9341BitBlitStretchNWriteLine
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; @param r9:r8 width
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; @param r17 repeat factor
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; @param X source position of line
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; @clobbers r16, r17, r18, r19, r24, r25, X
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ili9341BitBlitStretchNWriteLine:
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mov r24, r8
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mov r25, r9
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ili9341BitBlitStretchNWriteLine_loop1:
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ld r18, X+
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ld r19, X+
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push r17
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ili9341BitBlitStretchNWriteLine_loop2:
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mov r16, r19
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rcall SPIHW_MasterTransfer ; (R16)
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mov r16, r18
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rcall SPIHW_MasterTransfer ; (R16)
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dec r17
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brne ili9341BitBlitStretchNWriteLine_loop2
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pop r17
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sbiw r25:r24, 1
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brne ili9341BitBlitStretchNWriteLine_loop1
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ret
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; @end
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