diff options
| -rw-r--r-- | software/ihu/ihu.asm | 200 |
1 files changed, 122 insertions, 78 deletions
diff --git a/software/ihu/ihu.asm b/software/ihu/ihu.asm index fe4bc66..2b33219 100644 --- a/software/ihu/ihu.asm +++ b/software/ihu/ihu.asm @@ -38,7 +38,6 @@ ;; ------------------------------------- ;; DEFINES ;; constants -I2C_SPEED EQU .29 RTC_ADDR_W EQU b'11010000' RTC_ADDR_R EQU b'11010001' RTC_REG_SEC EQU H'00' @@ -71,17 +70,17 @@ DTMF_INT EQU 0 BAT_V EQU 1 SOLAR_V EQU 2 BAT_C EQU 3 -MPU_PWRDWN EQU 4 -MPU_RESET EQU 5 -MPU_INT EQU 6 -RTC_INT EQU 7 -;; PortC -MPU_CLK EQU 0 -MPU_SDO EQU 1 -MPU_SDI EQU 2 -RTC_SCL EQU 3 RTC_SDA EQU 4 -MPU_CS EQU 5 +RTC_SCL EQU 5 +RTC_INT EQU 6 +MPU_INT EQU 7 +;; PortC +MPU_PWRDWN EQU 0 +MPU_RESET EQU 1 +MPU_CS EQU 2 +MPU_SCK EQU 3 +MPU_SDI EQU 4 +MPU_SDO EQU 5 ICOM_TX EQU 6 ICOM_RX EQU 7 ;; PortD @@ -106,7 +105,7 @@ TTX_BIT_CNT EQU H'0022' TTX_BYTE_CNT EQU H'0023' TTX_CSUM EQU H'0024' -RTC_CNT EQU H'0028' +RTC_BYTE_CNT EQU H'0028' WAIT_CNT EQU H'0030' @@ -114,6 +113,9 @@ BUF EQU H'0040' BUF_END EQU H'004F' ;; all pages +RTC_BYTE EQU H'0070' +RTC_BIT_CNT EQU H'0071' + W_TEMP EQU H'007E' STATUS_TEMP EQU H'007F' @@ -173,7 +175,7 @@ init ;; bank 1 bsf STATUS,RP0 bcf STATUS,RP1 - movlw b'11000001' + movlw b'11110000' movwf WPUB movlw b'11000000' movwf IOCB @@ -182,9 +184,9 @@ init clrf PSTRCON movlw b'00010000' movwf OSCCON - movlw b'11001111' + movlw b'11111111' movwf TRISB - movlw b'11011100' + movlw b'11111000' movwf TRISC movlw b'10001111' movwf TRISD @@ -193,9 +195,6 @@ init movlw .12 movwf SPBRG clrf SPBRGH - movlw I2C_SPEED - movwf SSPADD - bsf SSPSTAT,SMP movlw b'00100000' movwf PIE1 clrf PIE2 @@ -205,11 +204,11 @@ init bcf STATUS,RP1 movlw b'10010000' movwf RCSTA - movlw b'00101000' - movwf SSPCON movlw B'01000000' movwf INTCON + clrf PORTB + bsf PORTD,DTMF_PWRDWN bcf PORTD,TTX_RESET ;reset TTX nop @@ -363,137 +362,183 @@ ttx_csum_error ;; ------------------------------------- i2c_start - bcf PIR1,SSPIF bsf STATUS,RP0 - bsf SSPCON2,SEN + bcf TRISB,RTC_SDA + nop + bcf TRISB,RTC_SCL bcf STATUS,RP0 - goto i2c_wait + return ;; ------------------ i2c_restart - bcf PIR1,SSPIF bsf STATUS,RP0 - bsf SSPCON2,RSEN + bsf TRISB,RTC_SDA + nop + bsf TRISB,RTC_SCL + nop + nop + nop + bcf TRISB,RTC_SDA + nop + bcf TRISB,RTC_SCL bcf STATUS,RP0 - goto i2c_wait + return ;; ------------------ i2c_stop - bcf PIR1,SSPIF bsf STATUS,RP0 - bsf SSPCON2,PEN + bsf TRISB,RTC_SCL + nop + bsf TRISB,RTC_SDA bcf STATUS,RP0 - goto i2c_wait + return ;; ------------------ i2c_send_byte - bcf PIR1,SSPIF - movwf SSPBUF - goto i2c_wait + movwf RTC_BYTE + movlw .8 + movwf RTC_BIT_CNT + bsf STATUS,RP0 +i2c_send_byte_next + btfss RTC_BYTE,7 + bcf TRISB,RTC_SDA + btfsc RTC_BYTE,7 + bsf TRISB,RTC_SDA + bsf TRISB,RTC_SCL + nop + nop + bcf TRISB,RTC_SCL + rlf RTC_BYTE,f + decfsz RTC_BIT_CNT,f + goto i2c_send_byte_next + + nop + nop + bsf TRISB,RTC_SDA + bsf TRISB,RTC_SCL + bcf STATUS,RP0 + movf PORTB,w + bsf STATUS,RP0 + bcf TRISB,RTC_SCL + bcf TRISB,RTC_SDA + bcf STATUS,RP0 + andlw b'00010000' + movwf RTC_BYTE + swapf RTC_BYTE,f + return ;; ------------------ i2c_recv_byte - bcf PIR1,SSPIF + clrf RTC_BYTE + movlw .8 + movwf RTC_BIT_CNT bsf STATUS,RP0 - bsf SSPCON2,RCEN + bsf TRISB,RTC_SDA +i2c_recv_byte_loop + bsf TRISB,RTC_SCL bcf STATUS,RP0 - goto i2c_wait + btfsc PORTB,RTC_SDA + bsf RTC_BYTE,0 + bsf STATUS,RP0 + bcf TRISB,RTC_SCL + decfsz RTC_BIT_CNT,f + goto i2c_recv_byte_next + + bcf TRISB,RTC_SDA + bcf STATUS,RP0 + return + +i2c_recv_byte_next + rlf RTC_BYTE,f + goto i2c_recv_byte_loop ;; ------------------ i2c_ack - bcf PIR1,SSPIF bsf STATUS,RP0 - bcf SSPCON2,ACKDT - bsf SSPCON2,ACKEN + bcf TRISB,RTC_SDA + bsf TRISB,RTC_SCL + nop + nop + bcf TRISB,RTC_SCL bcf STATUS,RP0 - goto i2c_wait + return ;; ------------------ i2c_nack - bcf PIR1,SSPIF bsf STATUS,RP0 - bsf SSPCON2,ACKDT - bsf SSPCON2,ACKEN + bsf TRISB,RTC_SDA + bsf TRISB,RTC_SCL + nop + nop + bcf TRISB,RTC_SCL + bcf TRISB,RTC_SDA bcf STATUS,RP0 - -i2c_wait - btfss PIR1,SSPIF - goto i2c_wait return ;; ------------------------------------- rtc_init call i2c_start - + movlw RTC_ADDR_W call i2c_send_byte - bsf STATUS,RP0 - btfsc SSPCON2,ACKSTAT + btfsc RTC_BYTE,0 goto rtc_init_error_ack - bcf STATUS,RP0 movlw RTC_REG_STAT call i2c_send_byte - bsf STATUS,RP0 - btfsc SSPCON2,ACKSTAT + btfsc RTC_BYTE,0 goto rtc_init_error_ack - bcf STATUS,RP0 call i2c_restart movlw RTC_ADDR_R call i2c_send_byte - bsf STATUS,RP0 - btfsc SSPCON2,ACKSTAT + btfsc RTC_BYTE,0 goto rtc_init_error_ack - bcf STATUS,RP0 call i2c_recv_byte call i2c_nack - call i2c_stop - btfsc SSPBUF,7 - goto rtc_init_clock_fail + btfsc RTC_BYTE,7 + goto rtc_init_after_clock_fail + call i2c_stop movlw '.' movwf TXREG return -rtc_init_clock_fail - call i2c_start +rtc_init_after_clock_fail + call i2c_restart movlw RTC_ADDR_W call i2c_send_byte - bsf STATUS,RP0 - btfsc SSPCON2,ACKSTAT + btfsc RTC_BYTE,0 goto rtc_init_error_ack - bcf STATUS,RP0 movlw RTC_REG_SEC call i2c_send_byte - bsf STATUS,RP0 - btfsc SSPCON2,ACKSTAT + btfsc RTC_BYTE,0 goto rtc_init_error_ack - bcf STATUS,RP0 - movlw .16 - movwf RTC_CNT + movlw .14 + movwf RTC_BYTE_CNT rtc_init_clear clrw call i2c_send_byte - bsf STATUS,RP0 - btfsc SSPCON2,ACKSTAT + btfsc RTC_BYTE,0 goto rtc_init_error_ack - bcf STATUS,RP0 - decfsz RTC_CNT,f + decfsz RTC_BYTE_CNT,f goto rtc_init_clear - movlw b'00000011' + movlw b'00000001' call i2c_send_byte - bsf STATUS,RP0 - btfsc SSPCON2,ACKSTAT + btfsc RTC_BYTE,0 + goto rtc_init_error_ack + + clrw + call i2c_send_byte + btfsc RTC_BYTE,0 goto rtc_init_error_ack - bcf STATUS,RP0 call i2c_stop movlw 'c' @@ -501,7 +546,6 @@ rtc_init_clear return rtc_init_error_ack - bcf STATUS,RP0 call i2c_stop movlw 'E' movwf TXREG |