ili9341: moved io code into own file. changed args to r0-r11.

2025-05-21 01:44:38 +02:00
parent b3d7d492d7
commit de94590fa0
3 changed files with 310 additions and 330 deletions
--- a/avr/modules/lcd2/ili9341/io_spi.asm
+++ b/avr/modules/lcd2/ili9341/io_spi.asm
@@ -0,0 +1,112 @@
+; ***************************************************************************
+; copyright   : (C) 2025 by Martin Preuss
+; email       : martin@libchipcard.de
+;
+; ***************************************************************************
+; * This file is part of the project "AqHome".                              *
+; * Please see toplevel file COPYING of that project for license details.   *
+; ***************************************************************************
+
+; generally we use the following parameters here:
+; @param r1:r0   background color
+; @param r3:r2   foreground color
+; @param r5:r4   X0
+; @param r7:r6   Y0
+; @param r9:r8   X1/W
+; @param r11:r10 Y1/H
+
+
+; ***************************************************************************
+; defines
+
+.equ ILI9341_SPIMODE = (0<<SPIHW_MODE_SPEED0_BIT) | \
+                       (0<<SPIHW_MODE_SPEED1_BIT) | \
+                       (1<<SPIHW_MODE_DOUBLESPEED_BIT) | \
+                       (0<<SPIHW_MODE_DATAORDER_BIT) | \
+                       (0<<SPIHW_MODE_CPOL_BIT) | \
+                       (0<<SPIHW_MODE_CPHA_BIT)
+
+
+
+; ***************************************************************************
+; code
+
+.cseg
+
+
+
+; ---------------------------------------------------------------------------
+; @routine ILI9341IoInit @global
+
+ILI9341IoInit:
+  ; setup pins
+  sbi ILI9341_RESET_DDR, ILI9341_RESET_PIN    ; RESET= output
+  sbi ILI9341_RESET_OUTPUT, ILI9341_RESET_PIN ; RESET= high
+  sbi ILI9341_DC_DDR, ILI9341_DC_PIN          ; DC   = output
+  sbi ILI9341_LED_DDR, ILI9341_LED_PIN        ; LED  = output
+  cbi ILI9341_LED_OUTPUT, ILI9341_LED_PIN     ; LED  = low
+
+  ret
+; @end
+
+
+
+; ---------------------------------------------------------------------------
+; @routine ili9341BeginSpi
+;
+; @clobbers r16, r17
+
+ili9341BeginSpi:
+  ldi r16, ILI9341_SPIMODE
+  ldi r17, ILI9341_DEVICENUM
+  rjmp SPIHW_MasterStart                   ; (R18)
+; @end
+
+
+
+; ---------------------------------------------------------------------------
+; @routine ili9341EndSpi
+;
+; @clobbers r16
+
+ili9341EndSpi:
+  rjmp SPIHW_MasterStop                    ; (R16)
+; @end
+
+
+
+ili9341SendCommand:
+  cbi SPIHW_SS_OUTPUT, SPIHW_SS_PIN       ; SS low
+  cbi ILI9341_DC_OUTPUT, ILI9341_DC_PIN   ; D low
+  nop
+  rcall SPIHW_MasterTransfer
+  sbi SPIHW_SS_OUTPUT, SPIHW_SS_PIN       ; SS low
+  ret
+; @end
+
+
+
+ili9341SendData:
+  cbi SPIHW_SS_OUTPUT, SPIHW_SS_PIN       ; SS low
+  sbi ILI9341_DC_OUTPUT, ILI9341_DC_PIN   ; D high
+  rcall SPIHW_MasterTransfer              ; (R16)
+  sbi SPIHW_SS_OUTPUT, SPIHW_SS_PIN       ; SS low
+  ret
+; @end
+
+
+
+; @param r19:18 data
+ili9341Send16BitData:
+  cbi SPIHW_SS_OUTPUT, SPIHW_SS_PIN       ; SS low
+  sbi ILI9341_DC_OUTPUT, ILI9341_DC_PIN   ; D high
+  mov r16, r19
+  rcall SPIHW_MasterTransfer              ; (R16)
+  mov r16, r18
+  rcall SPIHW_MasterTransfer              ; (R16)
+  sbi SPIHW_SS_OUTPUT, SPIHW_SS_PIN       ; SS low
+  ret
+; @end
+
+
+