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authorChristian Pointner <equinox@mur.at>2012-05-05 20:02:38 +0000
committerChristian Pointner <equinox@mur.at>2012-05-05 20:02:38 +0000
commit9a8009b77d426743bbaa8ebd6612f77d164f6b35 (patch)
treed626fa509dbb6164064de5ee513a68a23441815d
parentcleanup for exhibition plots (diff)
added simple timeout for DTMF decoder
git-svn-id: https://svn.spreadspace.org/mur.sat@397 7de4ea59-55d0-425e-a1af-a3118ea81d4c
-rw-r--r--software/ihu/ihu.asm32
1 files changed, 29 insertions, 3 deletions
diff --git a/software/ihu/ihu.asm b/software/ihu/ihu.asm
index 452c0d1..487d8e0 100644
--- a/software/ihu/ihu.asm
+++ b/software/ihu/ihu.asm
@@ -95,7 +95,8 @@ DTMF_BUF EQU H'0030' ; 5Bytes for incoming DTMF commands
DTMF_BUF_END EQU H'0034'
DTMF_BUF_PTR EQU H'0035'
DTMF_CS EQU H'0036'
-
+DTMF_TIMEOUT EQU H'0037'
+
RTC_TOD0 EQU H'003A'
RTC_TOD1 EQU H'003B'
RTC_TOD2 EQU H'003C'
@@ -179,6 +180,8 @@ STATUS_TEMP EQU H'007F'
goto int_rtc
btfsc PIR1,RCIF
goto int_uart_rx
+ btfsc PIR1,TMR1IF
+ goto int_tmr1
goto interrupt_end
int_dtmf
movf DTMF_BUF_PTR,w
@@ -200,9 +203,28 @@ int_dtmf
movwf TMP
int_dtmf_end
+ bcf T1CON,TMR1ON
+ clrf TMR1L
+ clrf TMR1H
+ movlw .6
+ movwf DTMF_TIMEOUT
+ bsf T1CON,TMR1ON
bcf INTCON,INTF
goto interrupt_end
+int_tmr1
+ decfsz DTMF_TIMEOUT,f
+ goto int_tmr1_end
+ bsf PORTD,DTMF_PWRDWN
+ bcf T1CON,TMR1ON
+ movlw DTMF_BUF
+ movwf DTMF_BUF_PTR
+ clrf DTMF_CS
+ bcf PORTD,DTMF_PWRDWN
+
+int_tmr1_end
+ bcf PIR1,TMR1IF
+ goto interrupt_end
int_rtc
btfsc PORTB,RTC_RST
@@ -278,7 +300,7 @@ init
movlw .12
movwf SPBRG
clrf SPBRGH
- movlw b'00100000'
+ movlw b'00100001'
movwf PIE1
clrf PIE2
@@ -298,7 +320,11 @@ init
movlw DTMF_BUF
movwf DTMF_BUF_PTR
clrf DTMF_CS
-
+ clrf TMR1L
+ clrf TMR1H
+ movlw b'00110000'
+ movwf T1CON
+
bcf PORTD,TTX_SCL
bcf PORTD,TTX_SDA
nop