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-rw-r--r--software/ihu/ihu.asm63
-rw-r--r--software/ttx/ttx.asm318
2 files changed, 268 insertions, 113 deletions
diff --git a/software/ihu/ihu.asm b/software/ihu/ihu.asm
index fba1121..bf87899 100644
--- a/software/ihu/ihu.asm
+++ b/software/ihu/ihu.asm
@@ -170,7 +170,26 @@ uart_rx_fe
;; -------------------------------------
ttx_send_byte
+ bsf PORTD,TTX_SCL
movwf TTX_BYTE
+ clrf TTX_CNT
+ bcf PORTD,TTX_SCL
+ttx_pre
+ nop
+ nop
+ nop
+ nop
+ nop
+ nop
+ nop
+ nop
+ nop
+ nop
+ nop
+ nop
+ nop
+ decfsz TTX_CNT,f
+ goto ttx_pre
movlw .8
movwf TTX_CNT
ttx_next_bit
@@ -179,7 +198,51 @@ ttx_next_bit
btfss TTX_BYTE,7
bcf PORTD,TTX_SDA
bsf PORTD,TTX_SCL
+ nop
+ nop
+ nop
+ nop
+ nop
+ nop
+ nop
+ nop
+ nop
+ nop
+ nop
bcf PORTD,TTX_SCL
+ nop
+ nop
+ nop
+ nop
+ nop
+ nop
+ nop
+ nop
+ nop
+ nop
+ nop
+ nop
+ nop
+ nop
+ nop
+ nop
+ nop
+ nop
+ nop
+ nop
+ nop
+ nop
+ nop
+ nop
+ nop
+ nop
+ nop
+ nop
+ nop
+ nop
+ nop
+ nop
+ nop
rlf TTX_BYTE,f
decfsz TTX_CNT,f
goto ttx_next_bit
diff --git a/software/ttx/ttx.asm b/software/ttx/ttx.asm
index 3a9664b..454e10c 100644
--- a/software/ttx/ttx.asm
+++ b/software/ttx/ttx.asm
@@ -32,21 +32,24 @@
LIST p=12F635
include "p12f635.inc"
- __config _WUREN_OFF & _FCMEN_OFF & _IESO_OFF & _BOD_OFF & _CPD_OFF & _CP_OFF & _MCLRE_ON & _PWRTE_OFF & _WDT_OFF & _INTRC_OSC_NOCLKOUT
+ __config _WUREN_OFF & _FCMEN_OFF & _IESO_OFF & _BOD_OFF & _CPD_OFF & _CP_OFF & _MCLRE_ON & _PWRTE_OFF & _WDT_ON & _INTRC_OSC_NOCLKOUT
;; -------------------------------------
;; DEFINES
;; constants
-DOT EQU .256 - .29
-DASH EQU .256 - .87
+DOT EQU .256 - .21 ; .29
+DASH EQU .256 - .63 ; .87
ESPACE EQU DOT
CSPACE EQU DASH
-WSPACE EQU .256 - .203
+WSPACE EQU .256 - .147 ; .203
ENABLE_TIME EQU DOT
-BCONINT_DEF EQU .5 ; *2 = Beacon Interval in seconds
-START_CHAR EQU 'A' - ' '
-
+BCONINT_DEF EQU .42
+START_CHAR EQU 'A'
+ACK_CHAR EQU 'A'
+OSC_LOW EQU b'00000000'
+OSC_HIGH EQU b'01100000'
+
;; I/O Pins
CWENABLE EQU GP0
CWOUT EQU GP1
@@ -63,20 +66,28 @@ CHARCNT EQU H'0044'
PENTLE0 EQU H'0045'
PENTLE1 EQU H'0046'
PENTLECNT EQU H'0047'
-
+ACK_DATA EQU H'0048'
+
+RX_CNT EQU H'004E'
+RX_BYTE EQU H'004F'
+
BUF EQU H'0050'
;; all pages
+STATE EQU H'0078'
BEACON_INT EQU H'0079'
-STATE EQU H'007A'
+NVSTATE EQU H'007A'
BEACONCNTH EQU H'007B'
BEACONCNTL EQU H'007C'
SECCNT EQU H'007D'
W_TEMP EQU H'007E'
STATUS_TEMP EQU H'007F'
- ;; bits STATE
+ ;; bits NVSTATE
safe EQU .0
+
+ ;; bits STATE
+rx EQU .0
;; -------------------------------------
;; Reset Vector
@@ -91,29 +102,56 @@ safe EQU .0
swapf STATUS,W
movwf STATUS_TEMP
- bcf STATUS,RP0
- bcf STATUS,RP1
-
btfss INTCON,INTF
goto tmr1_int
ext_int
- ;; TODO: read bit from GPIO,SDAT and add to received string
+ bcf INTCON,INTF
+ btfsc STATE,rx
goto interrupt_end
+ bsf STATUS,RP0
+ movlw OSC_HIGH
+ movwf OSCCON
+ bcf STATUS,RP0
+ movlw .8
+ movwf RX_CNT
+ext_int_clk_low
+ btfsc GPIO,SCLK
+ goto ext_int_clk_low
+ext_int_clk_high
+ btfss GPIO,SCLK
+ goto ext_int_clk_high
+ btfss GPIO,SDAT
+ bcf RX_BYTE,0
+ btfsc GPIO,SDAT
+ bsf RX_BYTE,0
+ decfsz RX_CNT,f
+ goto ext_int_rx_next
+ bsf STATE,rx
+ bsf STATUS,RP0
+ movlw OSC_LOW
+ movwf OSCCON
+ goto interrupt_end
+
+ext_int_rx_next
+ rlf RX_BYTE,f
+ goto ext_int_clk_low
tmr1_int
+ bcf STATUS,RP0
bcf PIR1,TMR1IF
- btfsc STATE,safe ; safe mode -> disable scheduler
- goto disable_tmr1
- movf SECCNT,w
+ bcf T1CON,TMR1ON
+ clrf TMR1L
+ movlw b'10000000'
+ movwf TMR1H
+ btfsc NVSTATE,safe ; safe mode -> disable scheduler
+ goto interrupt_end
+
+ bsf T1CON,TMR1ON
+ movf SECCNT,f
btfss STATUS,Z
- decf SECCNT,f
+ decf SECCNT,f
goto interrupt_end
-disable_tmr1
- bcf T1CON,TMR1ON
- movf BEACON_INT,w
- movwf SECCNT
-
interrupt_end
;; restore context
swapf STATUS_TEMP,W
@@ -123,55 +161,6 @@ interrupt_end
retfie
;; -------------------------------------
- ;; INIT
-init
- ;; bank 1
- bsf STATUS,RP0
- bcf STATUS,RP1
-
- movlw b'11000101'
- movwf OPTION_REG
- movlw b'11111100'
- movwf TRISIO
- movlw b'00000001'
- movwf PIE1
- movlw b'00010000'
- movwf OSCCON
-
- bcf STATUS,RP0
-
- ;; bank 0
- clrf TMR1L
- clrf TMR1H
- movlw b'00000110'
- movwf T1CON
- movlw b'01000000' ; enable external interrupt bit4
- movwf INTCON
-
- movlw b'00000111'
- movwf CMCON0
-
- bcf GPIO,CWOUT
- bcf GPIO,CWENABLE
-
- movf BEACON_INT,w
- movwf SECCNT
-
- clrf STATE ; TODO: read State from EEPROM
- movlw .42
- movwf BEACONCNTL ; TODO: read Beaconcnt from EEPROM
- movlw .23
- movwf BEACONCNTH
- movlw BCONINT_DEF ; TODO: read Beacon Interval from EEPROM
- movwf BEACON_INT
-
- btfss STATE,safe ; safe mode -> disable scheduler
- bsf T1CON,TMR1ON
-
- bsf INTCON,GIE
- goto main
-
- ;; -------------------------------------
;; TABLES
;; Morse Codes: 0=dot, 1=dash
@@ -303,50 +292,103 @@ getcwlen
;; Base32 Code
base32
addwf PCL,f
- retlw 'A' - ' '
- retlw 'B' - ' '
- retlw 'C' - ' '
- retlw 'D' - ' '
- retlw 'E' - ' '
- retlw 'F' - ' '
- retlw 'G' - ' '
- retlw 'H' - ' '
- retlw 'I' - ' '
- retlw 'J' - ' '
- retlw 'K' - ' '
- retlw 'L' - ' '
- retlw 'M' - ' '
- retlw 'N' - ' '
- retlw 'O' - ' '
- retlw 'P' - ' '
- retlw 'Q' - ' '
- retlw 'R' - ' '
- retlw 'S' - ' '
- retlw 'T' - ' '
- retlw 'U' - ' '
- retlw 'V' - ' '
- retlw 'W' - ' '
- retlw 'X' - ' '
- retlw 'Y' - ' '
- retlw 'Z' - ' '
- retlw '2' - ' '
- retlw '3' - ' '
- retlw '4' - ' '
- retlw '5' - ' '
- retlw '6' - ' '
- retlw '7' - ' '
+ retlw 'A'
+ retlw 'B'
+ retlw 'C'
+ retlw 'D'
+ retlw 'E'
+ retlw 'F'
+ retlw 'G'
+ retlw 'H'
+ retlw 'I'
+ retlw 'J'
+ retlw 'K'
+ retlw 'L'
+ retlw 'M'
+ retlw 'N'
+ retlw 'O'
+ retlw 'P'
+ retlw 'Q'
+ retlw 'R'
+ retlw 'S'
+ retlw 'T'
+ retlw 'U'
+ retlw 'V'
+ retlw 'W'
+ retlw 'X'
+ retlw 'Y'
+ retlw 'Z'
+ retlw '2'
+ retlw '3'
+ retlw '4'
+ retlw '5'
+ retlw '6'
+ retlw '7'
;; fixed strings
callsign
addwf PCL,f
nop
- retlw 'R' - ' '
- retlw 'U' - ' '
- retlw 'M' - ' '
- retlw '6' - ' '
- retlw 'E' - ' '
- retlw 'O' - ' '
+ retlw 'R'
+ retlw 'U'
+ retlw 'M'
+ retlw '6'
+ retlw 'E'
+ retlw 'O'
+
+ ;; -------------------------------------
+ ;; INIT
+init
+ ;; bank 1
+ bsf STATUS,RP0
+ bcf STATUS,RP1
+
+ movlw b'11000011'
+ movwf OPTION_REG
+ movlw b'11111100'
+ movwf TRISIO
+ movlw b'00000001'
+ movwf PIE1
+ movlw OSC_LOW
+ movwf OSCCON
+
+ bcf STATUS,RP0
+
+ ;; bank 0
+ movlw b'00010110'
+ movwf WDTCON
+ clrf TMR1L
+ movlw b'10000000'
+ movwf TMR1H
+ movlw b'00000110'
+ movwf T1CON
+ movlw b'01010000'
+ movwf INTCON
+
+ movlw b'00000111'
+ movwf CMCON0
+
+ bcf GPIO,CWOUT
+ bcf GPIO,CWENABLE
+
+ clrf STATE
+ clrf NVSTATE ; TODO: read State from EEPROM
+ movlw .42
+ movwf BEACONCNTL ; TODO: read Beaconcnt from EEPROM
+ movlw .23
+ movwf BEACONCNTH
+ movlw BCONINT_DEF ; TODO: read Beacon Interval from EEPROM
+ movwf BEACON_INT
+
+ movf BEACON_INT,w
+ movwf SECCNT
+
+ btfss NVSTATE,safe ; safe mode -> disable scheduler
+ bsf T1CON,TMR1ON
+ bsf INTCON,GIE
+ goto main
+
;; -------------------------------------
;; SUBROUTINES
dottime
@@ -355,11 +397,24 @@ dottime
dot_inner
btfss INTCON,T0IF
goto dot_inner
+ clrwdt
return
;; -------------------------------------
send_char
movwf CHAR
+ movlw 'Z' + 1
+ subwf CHAR,w
+ btfsc STATUS,C
+ return
+ movlw ' '
+ subwf CHAR,f
+ btfss STATUS,C
+ return
+ btfsc STATUS,Z
+ return
+
+ movf CHAR,w
call getcw
movwf ELEMENT
movf CHAR,w
@@ -368,7 +423,6 @@ send_char
movf ELECNT,f
btfsc STATUS,Z
return
- movf CHAR,w
xorwf PARITY,f
char_next_element
@@ -559,6 +613,8 @@ send_parity
andlw b'00011111'
call base32
call send_char
+ movlw WSPACE
+ call dottime
return
;; -------------------------------------
@@ -596,18 +652,54 @@ beacon_end
return
;; -------------------------------------
+send_ack
+ movwf ACK_DATA
+ bsf GPIO,CWENABLE
+ movlw ENABLE_TIME
+ call dottime
+ clrf PARITY
+
+ movlw ACK_CHAR
+ call send_char
+
+ movlw CSPACE
+ call dottime
+
+ movf ACK_DATA,w
+ call send_char
+
+ movlw CSPACE
+ call dottime
+
+ call send_parity
+
+ bcf GPIO,CWENABLE
+ return
+
+ ;; -------------------------------------
;; MAINLOOP
main
;; this gets called after reset and whenever a wakeup occured
;; (after TMR1 overrun or interrupt on GP2)
movf SECCNT,f
- btfss STATUS,Z
+ btfsc STATUS,Z
+ goto seccnt_zero
+ btfsc STATE,rx
+ goto byte_received
goto powerdown
- ;; this gets called every 2*BEACON_INT seconds
+ ;; this gets called every BEACON_INT seconds
+seccnt_zero
movf BEACON_INT,w
movwf SECCNT
call send_beacon
+ goto powerdown
+
+ ;; this gets called whenver a byte was received from ihu
+byte_received
+ movf RX_BYTE,w
+ bcf STATE,rx
+ call send_ack
powerdown
sleep
generated by cgit v1.2.3 (git 2.39.1) at 2024-09-18 01:50:06 +0000