avr: add LED module LED_SIMPLE

very much shorter version with only basic functionality.

avr/modules/0BUILD

@@ -10,6 +10,7 @@
     flash
     lcd
     led
+    led_simple
     reed
     si7021
     stats

avr/modules/led_simple/0BUILD

@@ -0,0 +1,11 @@
+<?xml?>
+
+<gwbuild>
+
+  <extradist>
+    main.asm
+  </extradist>
+
+</gwbuild>
+
+

avr/modules/led_simple/main.asm

@@ -0,0 +1,83 @@
+; ***************************************************************************
+; copyright   : (C) 2023 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.   *
+; ***************************************************************************
+
+
+
+; ***************************************************************************
+; data
+
+.dseg
+
+ledSimpleTimer:      .byte 1
+
+
+
+; ***************************************************************************
+; code
+
+.cseg
+
+
+LED_SIMPLE_BEGIN:
+
+
+
+; ---------------------------------------------------------------------------
+; LedSimple_Init
+;
+; IN:
+; - nothing
+; OUT:
+; - CFLAG: set if okay, clear on error
+; USED: R1, R2, R3, R4, R16, R17, X
+
+LedSimple_Init:
+  sbi LED_SIMPLE_DDR, LED_SIMPLE_PINNUM  ; out
+  cbi LED_SIMPLE_PORT, LED_SIMPLE_PINNUM ; on
+  ldi r16, LED_SIMPLE_ONTIME
+  sts ledSimpleTimer, r16
+  sec
+  ret
+
+
+; ---------------------------------------------------------------------------
+; LedSimple_Every100ms
+;
+; IN:
+; - nothing
+; OUT:
+; - nothing
+; USED: 
+
+LedSimple_Every100ms:
+  lds r16, ledSimpleTimer
+  dec r16
+  brne LedSimple_Every100ms_zero
+  rjmp LedSimple_Every100ms_setTimer
+LedSimple_Every100ms_zero:
+  sbic LED_SIMPLE_PORT, LED_SIMPLE_PINNUM ; skip next op if LED is on
+    rjmp LedSimple_Tick_isOff
+  ; is on
+  sbi LED_SIMPLE_PORT, LED_SIMPLE_PINNUM ; off
+  ldi r16, LED_SIMPLE_OFFTIME
+  rjmp LedSimple_Every100ms_setTimer
+LedSimple_Tick_isOff:
+  cbi LED_SIMPLE_PORT, LED_SIMPLE_PINNUM ; on
+  ldi r16, LED_SIMPLE_ONTIME
+LedSimple_Every100ms_setTimer:
+  sts ledSimpleTimer, r16
+  ret
+
+
+
+LED_SIMPLE_END:
+.equ MODULE_SIZE_LED_SIMPLE = LED_SIMPLE_END-LED_SIMPLE_BEGIN
+
+
+