wn/rgb-driver-01
Archived
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Merge branch 'main' of gitea.hottis.de:wn/rgb-driver-01

Browse Source
This commit is contained in:
Wolfgang Hottgenroth 2024-03-06 10:37:12 +01:00
commit 2bef7bf2c2
Signed by: wn
GPG Key ID: 836E9E1192A6B132
2 changed files with 140 additions and 68 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

38
colors.S
View File

@ -1,17 +1,7 @@
#include "colors.h" #include "colors.h"
#define DIMM_FACTOR 3
.section ".rodata","a" .section ".rodata","a"
screendata_tmpl:
.global screendata_tmpl
.byte _red
.byte _magenta
.byte _blue
.byte _cyan
.byte _green
.byte _yellow
screendataend_tmpl:
.byte 0xff
;; color definitions according to ;; color definitions according to
;; https://learn.sparkfun.com/tutorials/lilypad-protosnap-plus-activity-guide/3-custom-color-mixing ;; https://learn.sparkfun.com/tutorials/lilypad-protosnap-plus-activity-guide/3-custom-color-mixing
colors: colors:
@ -20,29 +10,29 @@ colors:
off: off:
.byte 0x00, 0x00, 0x00, 0 .byte 0x00, 0x00, 0x00, 0
blue: blue:
.byte 0x00, 0x00, 0xff, 0 .byte 0x00>>DIMM_FACTOR, 0x00>>DIMM_FACTOR, 0xff>>DIMM_FACTOR, 0
green: green:
.byte 0x00, 0xff, 0x00, 0 .byte 0x00>>DIMM_FACTOR, 0xff>>DIMM_FACTOR, 0x00>>DIMM_FACTOR, 0
orange: orange:
.byte 0xff, 0x80, 0x00, 0 .byte 0xff>>DIMM_FACTOR, 0x80>>DIMM_FACTOR, 0x00>>DIMM_FACTOR, 0
rose: rose:
.byte 0xff, 0x00, 0x80, 0 .byte 0xff>>DIMM_FACTOR, 0x00>>DIMM_FACTOR, 0x80>>DIMM_FACTOR, 0
magenta: magenta:
.byte 0xff, 0x00, 0xff, 0 .byte 0xff>>DIMM_FACTOR, 0x00>>DIMM_FACTOR, 0xff>>DIMM_FACTOR, 0
violet: violet:
.byte 0x80, 0x00, 0xff, 0 .byte 0x80>>DIMM_FACTOR, 0x00>>DIMM_FACTOR, 0xff>>DIMM_FACTOR, 0
azure: azure:
.byte 0x00, 0x80, 0xff, 0 .byte 0x00>>DIMM_FACTOR, 0x80>>DIMM_FACTOR, 0xff>>DIMM_FACTOR, 0
cyan: cyan:
.byte 0x00, 0xff, 0xff, 0 .byte 0x00>>DIMM_FACTOR, 0xff>>DIMM_FACTOR, 0xff>>DIMM_FACTOR, 0
springgreen: springgreen:
.byte 0x00, 0xff, 0x80, 0 .byte 0x00>>DIMM_FACTOR, 0xff>>DIMM_FACTOR, 0x80>>DIMM_FACTOR, 0
chartreuse: chartreuse:
.byte 0x80, 0xff, 0x00, 0 .byte 0x80>>DIMM_FACTOR, 0xff>>DIMM_FACTOR, 0x00>>DIMM_FACTOR, 0
yellow: yellow:
.byte 0xff, 0xff, 0x00, 0 .byte 0xff>>DIMM_FACTOR, 0xff>>DIMM_FACTOR, 0x00>>DIMM_FACTOR, 0
white: white:
.byte 0xff, 0xff, 0xff, 0 .byte 0xff>>DIMM_FACTOR, 0xff>>DIMM_FACTOR, 0xff>>DIMM_FACTOR, 0
red: red:
.byte 0xff, 0x00, 0x00, 0 .byte 0xff>>DIMM_FACTOR, 0x00>>DIMM_FACTOR, 0x00>>DIMM_FACTOR, 0

170
main.S
View File

@ -1,5 +1,3 @@
.file "main.S"
#include <msp430g2553.h> #include <msp430g2553.h>
#include "colors.h" #include "colors.h"
@ -8,20 +6,23 @@
#define SR r2 #define SR r2
;; ----------------------------------------------------
;; --- r4, r5 and r6 must not be used for any other ---
;; --- purpose ---
;; required for communication between drawscreen and isr
#define SIGNAL_REGISTER r4 #define SIGNAL_REGISTER r4
#define SIGNAL_OCTET_DONE 0x01 #define SIGNAL_OCTET_DONE 0x01
#define SIGNAL_ISR_ENABLE 0x02 #define SIGNAL_ISR_ENABLE 0x02
#define SIGNAL_ALL_DATA_DONE 0x04 #define SIGNAL_ALL_DATA_DONE 0x04
#define SIGNAL_INIT_VALUE SIGNAL_OCTET_DONE
;; required for handover of data between drawscreen and isr
#define DATA_NEXT_ADDRESS_REGISTER r7
#define DATA_END_ADDRESS_REGISTER r8
#define DATA_REGISTER r5 #define DATA_REGISTER r5
#define NEXT_DATA_REGISTER r9
;; required for sequencing of isr
#define BIT_COUNTER_REGISTER r6 #define BIT_COUNTER_REGISTER r6
#define BIT_COUNTER_INIT_VALUE 0x01 #define BIT_COUNTER_INIT_VALUE 0x01
;; ----------------------------------------------------
;; 2.48us ;; 2.48us
@ -52,11 +53,13 @@
.section ".data" .section ".data"
screendata: screendata:
.rept 6 .rept 60 ;; number of leds in hardward
.byte 0 .byte 0
.endr .endr
screendataend: screendataend:
.byte 0xff .byte 0xff
data_forward_pointer:
.word 0
;; .text is the name of the section, it is a hint for the linker to ;; .text is the name of the section, it is a hint for the linker to
@ -65,6 +68,7 @@ screendataend:
;; @progbits is a hint for the linker to allocate this section into ;; @progbits is a hint for the linker to allocate this section into
;; program memory (flash) ;; program memory (flash)
.section ".text","ax",@progbits .section ".text","ax",@progbits
;; ----------------------------------------------------
_start: _start:
;; disable watchdog ;; disable watchdog
mov.w #WDTPW|WDTHOLD,&WDTCTL mov.w #WDTPW|WDTHOLD,&WDTCTL
@ -78,21 +82,6 @@ _start:
;; initialize stack pointer with value from linker ;; initialize stack pointer with value from linker
mov.w #__stack, SP mov.w #__stack, SP
;; ----------------------------------------------
;; load data from template area in rom into ram
;; uses arbitrary register before loading registers
;; for later use
mov.w #screendata, r7
mov.w #screendataend, r8
mov.w #screendata_tmpl, r9
_start_load_next:
mov.b @r9, @r7
inc.w r7
inc.w r9
cmp.w r7, r8
jnz _start_load_next
;; ----------------------------------------------
init: init:
;; configuration of GPIO Ports ;; configuration of GPIO Ports
;; BIT0: data bit ;; BIT0: data bit
@ -119,6 +108,103 @@ init:
mov.w #OUTMOD_7,&TA1CCTL1 mov.w #OUTMOD_7,&TA1CCTL1
mov.w #OUTMOD_7,&TA1CCTL2 mov.w #OUTMOD_7,&TA1CCTL2
;; make sure the isr will not immediately start
mov.b #SIGNAL_INIT_VALUE, SIGNAL_REGISTER
;; start timer in up mode
bis.w #MC0,&TA1CTL
;; enable interrupts
eint
;; ----------------------------------------------------
mainloop:
call #forwardscreen_init
call #resetscreen
mainloop_draw:
call #drawscreen
call #forwardscreen
call #wait
jmp mainloop_draw
;; ----------------------------------------------------
wait:
push r11
push r12
mov.w #0x0040, r11
wait_continue_1:
mov.w #0xffff, r12
wait_continue_2:
dec.w r12
jnz wait_continue_2
dec.w r11
jnz wait_continue_1
pop r12
pop r11
ret
;; ----------------------------------------------------
forwardscreen_init:
mov.w #screendata, &data_forward_pointer
ret
;; ----------------------------------------------------
forwardscreen:
push r8
push r10
mov.w #screendataend, r8
mov.w data_forward_pointer, r10
mov.b #_off, @r10
inc.w r10
mov.b #_green, @r10
cmp.w r10, r8
jnz forwardscreen_done
mov.w #screendata, r10
forwardscreen_done:
mov.w r10, data_forward_pointer
pop r10
pop r8
ret
;; ----------------------------------------------------
resetscreen:
push r7
push r8
;; reset screen data
mov.w #screendata, r7
mov.w #screendataend, r8
resetscreen_continue:
mov.b #_off, @r7
inc.w r7
cmp.w r7, r8
jnz resetscreen_continue
pop r8
pop r7
ret
;; ----------------------------------------------------
drawscreen:
push r7
push r8
push r9
#define DATA_NEXT_ADDRESS_REGISTER r7
#define DATA_END_ADDRESS_REGISTER r8
#define NEXT_DATA_REGISTER r9
;; initialize bit-counter for isr ;; initialize bit-counter for isr
mov.b #BIT_COUNTER_INIT_VALUE, BIT_COUNTER_REGISTER mov.b #BIT_COUNTER_INIT_VALUE, BIT_COUNTER_REGISTER
;; initialize isr-sync register, signal BYTE_DONE for the first start ;; initialize isr-sync register, signal BYTE_DONE for the first start
@ -129,15 +215,10 @@ init:
;; screen data end into r8 ;; screen data end into r8
mov.w #screendataend, DATA_END_ADDRESS_REGISTER mov.w #screendataend, DATA_END_ADDRESS_REGISTER
;; start timer in up mode drawscreen_continue:
bis.w #MC0,&TA1CTL
;; enable interrupts
eint
mainloop:
;; prepare next byte to handle by isr ;; prepare next byte to handle by isr
cmp.w DATA_NEXT_ADDRESS_REGISTER, DATA_END_ADDRESS_REGISTER cmp.w DATA_NEXT_ADDRESS_REGISTER, DATA_END_ADDRESS_REGISTER
jz mainloop_data_done jz drawscreen_data_done
;; load next data byte ;; load next data byte
mov.b @DATA_NEXT_ADDRESS_REGISTER, NEXT_DATA_REGISTER mov.b @DATA_NEXT_ADDRESS_REGISTER, NEXT_DATA_REGISTER
@ -150,44 +231,45 @@ mainloop:
;; enable isr ;; enable isr
bis #SIGNAL_ISR_ENABLE, SIGNAL_REGISTER bis #SIGNAL_ISR_ENABLE, SIGNAL_REGISTER
mainloop_wait_for_isr_0: drawscreen_wait_for_isr_0:
;; check bit0 in sync register ;; check bit0 in sync register
bit #SIGNAL_OCTET_DONE, SIGNAL_REGISTER bit #SIGNAL_OCTET_DONE, SIGNAL_REGISTER
jz mainloop_wait_for_isr_0 jz drawscreen_wait_for_isr_0
;; load data ;; load data
mov.b colors(NEXT_DATA_REGISTER), DATA_REGISTER mov.b colors(NEXT_DATA_REGISTER), DATA_REGISTER
;; clear BYTE_DONE ;; clear BYTE_DONE
bic #SIGNAL_OCTET_DONE, SIGNAL_REGISTER bic #SIGNAL_OCTET_DONE, SIGNAL_REGISTER
mainloop_wait_for_isr_1: drawscreen_wait_for_isr_1:
;; check bit0 in sync register ;; check bit0 in sync register
bit #SIGNAL_OCTET_DONE, SIGNAL_REGISTER bit #SIGNAL_OCTET_DONE, SIGNAL_REGISTER
jz mainloop_wait_for_isr_1 jz drawscreen_wait_for_isr_1
;; load data ;; load data
mov.b colors+1(NEXT_DATA_REGISTER), DATA_REGISTER mov.b colors+1(NEXT_DATA_REGISTER), DATA_REGISTER
;; clear BYTE_DONE ;; clear BYTE_DONE
bic #SIGNAL_OCTET_DONE, SIGNAL_REGISTER bic #SIGNAL_OCTET_DONE, SIGNAL_REGISTER
mainloop_wait_for_isr_2: drawscreen_wait_for_isr_2:
;; check bit0 in sync register ;; check bit0 in sync register
bit #SIGNAL_OCTET_DONE, SIGNAL_REGISTER bit #SIGNAL_OCTET_DONE, SIGNAL_REGISTER
jz mainloop_wait_for_isr_2 jz drawscreen_wait_for_isr_2
;; load data ;; load data
mov.b colors+2(NEXT_DATA_REGISTER), DATA_REGISTER mov.b colors+2(NEXT_DATA_REGISTER), DATA_REGISTER
;; clear BYTE_DONE ;; clear BYTE_DONE
bic #SIGNAL_OCTET_DONE, SIGNAL_REGISTER bic #SIGNAL_OCTET_DONE, SIGNAL_REGISTER
;; continue ;; continue
jmp mainloop jmp drawscreen_continue
mainloop_data_done: drawscreen_data_done:
;; signal all data processed, isr finish ;; signal all data processed, isr finish
bis #SIGNAL_ALL_DATA_DONE, SIGNAL_REGISTER bis #SIGNAL_ALL_DATA_DONE, SIGNAL_REGISTER
set_debug
;; continue pop r9
jmp mainloop pop r8
pop r7
ret
;; ----------------------------------------------------
; --- timer isr --- ; --- timer isr ---
;; r6: exclusively used by isr as bit-counter ;; r6: exclusively used by isr as bit-counter
timer1_a0_isr: timer1_a0_isr:
@ -228,7 +310,7 @@ timer1_a0_isr_exit:
reti reti
;; ----------------------------------------------------
.section "__interrupt_vector_14","ax",@progbits .section "__interrupt_vector_14","ax",@progbits
.word timer1_a0_isr .word timer1_a0_isr