softpwmpdk/leddriver16bit.asm at main · brainsmoke/softpwmpdk · GitHub

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.module softpwmpdk

BUFSIZE=8

.include "pdk.asm"
.include "delay.asm"
.include "settings.asm"
.include "uart2.asm"
.include "softpwm16.asm"

.area DATA (ABS)
.org 0x00


; bitwise ops need to have an address < 16

shiftreg:       .ds 1
error:          .ds 1

uart_state:     .ds 1
pin_mask_cur:   .ds 1

pinmask:        .ds 1
uart_tmp:       .ds 1

low1_staging:   .ds 1
low2_staging:   .ds 1
low3_staging:   .ds 1

refresh:        .ds 1

; word aligned
;...
p_lo:           .ds 1
p_hi:           .ds 1

out0:           .ds 1
out1:           .ds 1
cycle:          .ds 1
switch_channel: .ds 1

high:           .ds 1

high1:          .ds 1
high2:          .ds 1
high3:          .ds 1

high1_staging:  .ds 1
high2_staging:  .ds 1
high3_staging:  .ds 1

low:            .ds 1

low1:           .ds 1
low2:           .ds 1
low3:           .ds 1

dith:           .ds 1

dith1:          .ds 1
dith2:          .ds 1
dith3:          .ds 1

dith1_staging:  .ds 1
dith2_staging:  .ds 1
dith3_staging:  .ds 1

cmp1:           .ds 1
cmp2:           .ds 1
cmp3:           .ds 1

rem1:           .ds 1
rem2:           .ds 1
rem3:           .ds 1

low_highnib:    .ds 1
low_cur:        .ds 1
;
index:          .ds 1
cur_channel:    .ds 1

wait_count:     .ds 1
bit_count:      .ds 1
reset_count:    .ds 1

index_const:    .ds 1

.area CODE (ABS)
.org 0x00

.ifeq DEVICE-PMS150C
set_fuse FUSE_SET_LVR_2V75
.endif
; pull mosfets low first

clock_8mhz
brownout_erratum_workaround_init

;
;   ________                                                                        ________
;           ________0000000011111111222222223333333344444444555555556666666677777777
;                                                                                      /\
;           |-----------| (start_wait+1/2)*interval                                   9 1/2 baud
;        time to first sample (avg)                                               sample stop bit (avg)
;
;baud = 38400
;start_wait = 4
;bit_wait = 3
;check_interval = 64
;cycles = (.5+start_wait+8*bit_wait)*check_interval
;t = 9.5/baud
;freq = cycles/t
;print(freq)
FREQ=7372800

easypdk_calibrate FREQ, 3300

mov a, #PINMASK
mov pac, a
mov a, #0
mov pa, a

watchdog_enable
wdreset

find_settings settings p_lo
read_settings index_const

softpwm_init
uart_init

wdreset
softpwm

settings:
;.rept 256
;nop
;.endm
mov a, #INDEX
; update index by nopping (0x0000) out this instruction and appending a new mov, #NEW_INDEX
;