Merge branch 'main' of gitea.hottis.de:wn/rgb-driver-01
This commit is contained in:
commit
2bef7bf2c2
GPG Key ID:
836E9E1192A6B132
38
colors.S
38
colors.S
@ -1,17 +1,7 @@
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#include "colors.h"
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#define DIMM_FACTOR 3
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.section ".rodata","a"
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screendata_tmpl:
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.global screendata_tmpl
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.byte _red
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.byte _magenta
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.byte _blue
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.byte _cyan
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.byte _green
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.byte _yellow
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screendataend_tmpl:
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.byte 0xff
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;; color definitions according to
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;; https://learn.sparkfun.com/tutorials/lilypad-protosnap-plus-activity-guide/3-custom-color-mixing
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colors:
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@ -20,29 +10,29 @@ colors:
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off:
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.byte 0x00, 0x00, 0x00, 0
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blue:
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.byte 0x00, 0x00, 0xff, 0
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.byte 0x00>>DIMM_FACTOR, 0x00>>DIMM_FACTOR, 0xff>>DIMM_FACTOR, 0
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green:
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.byte 0x00, 0xff, 0x00, 0
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.byte 0x00>>DIMM_FACTOR, 0xff>>DIMM_FACTOR, 0x00>>DIMM_FACTOR, 0
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orange:
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.byte 0xff, 0x80, 0x00, 0
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.byte 0xff>>DIMM_FACTOR, 0x80>>DIMM_FACTOR, 0x00>>DIMM_FACTOR, 0
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rose:
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.byte 0xff, 0x00, 0x80, 0
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.byte 0xff>>DIMM_FACTOR, 0x00>>DIMM_FACTOR, 0x80>>DIMM_FACTOR, 0
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magenta:
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.byte 0xff, 0x00, 0xff, 0
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.byte 0xff>>DIMM_FACTOR, 0x00>>DIMM_FACTOR, 0xff>>DIMM_FACTOR, 0
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violet:
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.byte 0x80, 0x00, 0xff, 0
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.byte 0x80>>DIMM_FACTOR, 0x00>>DIMM_FACTOR, 0xff>>DIMM_FACTOR, 0
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azure:
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.byte 0x00, 0x80, 0xff, 0
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.byte 0x00>>DIMM_FACTOR, 0x80>>DIMM_FACTOR, 0xff>>DIMM_FACTOR, 0
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cyan:
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.byte 0x00, 0xff, 0xff, 0
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.byte 0x00>>DIMM_FACTOR, 0xff>>DIMM_FACTOR, 0xff>>DIMM_FACTOR, 0
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springgreen:
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.byte 0x00, 0xff, 0x80, 0
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.byte 0x00>>DIMM_FACTOR, 0xff>>DIMM_FACTOR, 0x80>>DIMM_FACTOR, 0
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chartreuse:
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.byte 0x80, 0xff, 0x00, 0
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.byte 0x80>>DIMM_FACTOR, 0xff>>DIMM_FACTOR, 0x00>>DIMM_FACTOR, 0
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yellow:
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.byte 0xff, 0xff, 0x00, 0
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.byte 0xff>>DIMM_FACTOR, 0xff>>DIMM_FACTOR, 0x00>>DIMM_FACTOR, 0
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white:
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.byte 0xff, 0xff, 0xff, 0
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.byte 0xff>>DIMM_FACTOR, 0xff>>DIMM_FACTOR, 0xff>>DIMM_FACTOR, 0
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red:
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.byte 0xff, 0x00, 0x00, 0
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.byte 0xff>>DIMM_FACTOR, 0x00>>DIMM_FACTOR, 0x00>>DIMM_FACTOR, 0
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170
main.S
170
main.S
@ -1,5 +1,3 @@
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.file "main.S"
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#include <msp430g2553.h>
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#include "colors.h"
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@ -8,20 +6,23 @@
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#define SR r2
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;; ----------------------------------------------------
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;; --- r4, r5 and r6 must not be used for any other ---
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;; --- purpose ---
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;; required for communication between drawscreen and isr
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#define SIGNAL_REGISTER r4
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#define SIGNAL_OCTET_DONE 0x01
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#define SIGNAL_ISR_ENABLE 0x02
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#define SIGNAL_ALL_DATA_DONE 0x04
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#define SIGNAL_INIT_VALUE SIGNAL_OCTET_DONE
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#define DATA_NEXT_ADDRESS_REGISTER r7
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#define DATA_END_ADDRESS_REGISTER r8
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;; required for handover of data between drawscreen and isr
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#define DATA_REGISTER r5
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#define NEXT_DATA_REGISTER r9
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;; required for sequencing of isr
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#define BIT_COUNTER_REGISTER r6
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#define BIT_COUNTER_INIT_VALUE 0x01
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;; ----------------------------------------------------
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;; 2.48us
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@ -52,11 +53,13 @@
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.section ".data"
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screendata:
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.rept 6
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.rept 60 ;; number of leds in hardward
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.byte 0
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.endr
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screendataend:
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.byte 0xff
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data_forward_pointer:
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.word 0
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;; .text is the name of the section, it is a hint for the linker to
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@ -65,6 +68,7 @@ screendataend:
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;; @progbits is a hint for the linker to allocate this section into
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;; program memory (flash)
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.section ".text","ax",@progbits
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;; ----------------------------------------------------
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_start:
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;; disable watchdog
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mov.w #WDTPW|WDTHOLD,&WDTCTL
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@ -78,21 +82,6 @@ _start:
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;; initialize stack pointer with value from linker
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mov.w #__stack, SP
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;; ----------------------------------------------
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;; load data from template area in rom into ram
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;; uses arbitrary register before loading registers
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;; for later use
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mov.w #screendata, r7
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mov.w #screendataend, r8
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mov.w #screendata_tmpl, r9
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_start_load_next:
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mov.b @r9, @r7
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inc.w r7
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inc.w r9
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cmp.w r7, r8
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jnz _start_load_next
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;; ----------------------------------------------
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init:
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;; configuration of GPIO Ports
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;; BIT0: data bit
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@ -119,6 +108,103 @@ init:
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mov.w #OUTMOD_7,&TA1CCTL1
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mov.w #OUTMOD_7,&TA1CCTL2
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;; make sure the isr will not immediately start
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mov.b #SIGNAL_INIT_VALUE, SIGNAL_REGISTER
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;; start timer in up mode
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bis.w #MC0,&TA1CTL
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;; enable interrupts
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eint
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;; ----------------------------------------------------
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mainloop:
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call #forwardscreen_init
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call #resetscreen
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mainloop_draw:
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call #drawscreen
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call #forwardscreen
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call #wait
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jmp mainloop_draw
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;; ----------------------------------------------------
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wait:
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push r11
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push r12
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mov.w #0x0040, r11
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wait_continue_1:
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mov.w #0xffff, r12
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wait_continue_2:
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dec.w r12
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jnz wait_continue_2
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dec.w r11
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jnz wait_continue_1
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pop r12
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pop r11
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ret
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;; ----------------------------------------------------
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forwardscreen_init:
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mov.w #screendata, &data_forward_pointer
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ret
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;; ----------------------------------------------------
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forwardscreen:
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push r8
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push r10
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mov.w #screendataend, r8
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mov.w data_forward_pointer, r10
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mov.b #_off, @r10
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inc.w r10
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mov.b #_green, @r10
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cmp.w r10, r8
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jnz forwardscreen_done
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mov.w #screendata, r10
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forwardscreen_done:
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mov.w r10, data_forward_pointer
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pop r10
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pop r8
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ret
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;; ----------------------------------------------------
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resetscreen:
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push r7
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push r8
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;; reset screen data
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mov.w #screendata, r7
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mov.w #screendataend, r8
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resetscreen_continue:
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mov.b #_off, @r7
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inc.w r7
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cmp.w r7, r8
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jnz resetscreen_continue
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pop r8
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pop r7
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ret
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;; ----------------------------------------------------
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drawscreen:
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push r7
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push r8
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push r9
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#define DATA_NEXT_ADDRESS_REGISTER r7
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#define DATA_END_ADDRESS_REGISTER r8
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#define NEXT_DATA_REGISTER r9
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;; initialize bit-counter for isr
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mov.b #BIT_COUNTER_INIT_VALUE, BIT_COUNTER_REGISTER
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;; initialize isr-sync register, signal BYTE_DONE for the first start
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@ -129,15 +215,10 @@ init:
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;; screen data end into r8
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mov.w #screendataend, DATA_END_ADDRESS_REGISTER
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;; start timer in up mode
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bis.w #MC0,&TA1CTL
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;; enable interrupts
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eint
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mainloop:
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drawscreen_continue:
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;; prepare next byte to handle by isr
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cmp.w DATA_NEXT_ADDRESS_REGISTER, DATA_END_ADDRESS_REGISTER
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jz mainloop_data_done
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jz drawscreen_data_done
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;; load next data byte
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mov.b @DATA_NEXT_ADDRESS_REGISTER, NEXT_DATA_REGISTER
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@ -150,44 +231,45 @@ mainloop:
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;; enable isr
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bis #SIGNAL_ISR_ENABLE, SIGNAL_REGISTER
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mainloop_wait_for_isr_0:
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drawscreen_wait_for_isr_0:
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;; check bit0 in sync register
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bit #SIGNAL_OCTET_DONE, SIGNAL_REGISTER
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jz mainloop_wait_for_isr_0
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jz drawscreen_wait_for_isr_0
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;; load data
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mov.b colors(NEXT_DATA_REGISTER), DATA_REGISTER
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;; clear BYTE_DONE
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bic #SIGNAL_OCTET_DONE, SIGNAL_REGISTER
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mainloop_wait_for_isr_1:
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drawscreen_wait_for_isr_1:
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;; check bit0 in sync register
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bit #SIGNAL_OCTET_DONE, SIGNAL_REGISTER
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jz mainloop_wait_for_isr_1
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jz drawscreen_wait_for_isr_1
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;; load data
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mov.b colors+1(NEXT_DATA_REGISTER), DATA_REGISTER
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;; clear BYTE_DONE
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bic #SIGNAL_OCTET_DONE, SIGNAL_REGISTER
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mainloop_wait_for_isr_2:
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drawscreen_wait_for_isr_2:
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;; check bit0 in sync register
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bit #SIGNAL_OCTET_DONE, SIGNAL_REGISTER
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jz mainloop_wait_for_isr_2
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jz drawscreen_wait_for_isr_2
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;; load data
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mov.b colors+2(NEXT_DATA_REGISTER), DATA_REGISTER
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;; clear BYTE_DONE
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bic #SIGNAL_OCTET_DONE, SIGNAL_REGISTER
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;; continue
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jmp mainloop
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jmp drawscreen_continue
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mainloop_data_done:
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drawscreen_data_done:
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;; signal all data processed, isr finish
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bis #SIGNAL_ALL_DATA_DONE, SIGNAL_REGISTER
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set_debug
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;; continue
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jmp mainloop
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pop r9
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pop r8
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pop r7
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ret
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;; ----------------------------------------------------
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; --- timer isr ---
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;; r6: exclusively used by isr as bit-counter
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timer1_a0_isr:
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@ -228,7 +310,7 @@ timer1_a0_isr_exit:
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reti
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;; ----------------------------------------------------
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.section "__interrupt_vector_14","ax",@progbits
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.word timer1_a0_isr
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