new SPURIOUS for reporting spurious short circuit interruptes

diff --git a/cebpic/README.protocol b/cebpic/README.protocol
index 14938cf8e25bc6ba374911ef907b798a2f666eb4..5169771f37302f4419d0d091e9160e29f873c91f 100644 (file)
--- a/cebpic/README.protocol
+++ b/cebpic/README.protocol
@@ -60,6 +60,7 @@ From PIC to host:
 
  < 1 001Y SSS  0 SSSSSSS  (9?) DETECT    Train is (Y=1) or is not (Y=0) at S
  < 1 0001 XXX  0 XXXXXXX  (88+)        PONG      Pong `X' (reply to Ping `X')
+ < 1 100 0001  0 NNNNNNN  (ENQ) SPURIOUS  Number of spurious fault interrupts
  < 0 000 1001             (HT)  HELLO    I am booted
  < 0 000 1011             (VT)  AAARGH   Followed by debug chars (only)
  < 0 000 1101             (CR)  WTIMEOUT  Watchdog timeout happened

diff --git a/detpic/energy.asm b/detpic/energy.asm
index 5dab54d3492eeb98041ff1d95ed6eaf4ebf7b672..b4229a5b28ba4be40f957b22f47ed59c95630923 100644 (file)
--- a/detpic/energy.asm
+++ b/detpic/energy.asm
@@ -15,6 +15,8 @@ settling      res     1 ; all counters are 0 if stopped
 stop_wait      res     1 ;  or otherwise count down
 retry_wait     res     1
 
+fault_spurious_count   res     1
+
   code
 
 ;======================================================================
@@ -103,6 +105,7 @@ power_fault_init @
        bs_f    INTCON3, INT1IE
        clr_f   stop_wait
        clr_f   retry_wait
+       clr_f   fault_spurious_count
        pin_h   p0_booster_shutdown
        pin_h   p0_booster_userfault
        ; now we are Off
@@ -142,10 +145,30 @@ code2 code
 power_fault_intrl @
        bt_f_if0 INTCON3, INT1IF
        return
-       ; we have a fault:
+       ; we may have a fault:
 
        bc_f    INTCON3, INT1IF
 
+       call    portb_read
+       pin_inw_ifh p0_booster_overload
+       bra     fault_isactual
+       ; spurious:
+
+       inc_f_ifz fault_spurious_count  ; ++f.s._count == 0x00 ?
+       bs_f    fault_spurious_count, 7 ; f.s._count = 0x80
+
+       intrl_handled_nostack
+
+;-----
+fault_isactual
+; call serial_addbyte
+; call portb_read
+; call serial_addbyte_another
+; call portb_read
+; call serial_addbyte_another
+; call portb_read
+; call serial_addbyte_another
+
        pinlat_ifh p0_booster_shutdown
        bra faultintrl_noop
                ; Off, Stopping or Persists - must have lost the race
@@ -211,6 +234,10 @@ power_stop_doflash
 
 ;--------------------
 power_fault_tickdiv @
+       tst_f_ifnz fault_spurious_count
+       bra     fault_spurious_tickdiv
+       ; in any case:
+fault_tickdiv_rest
        tst_f_ifnz stop_wait
        dec_f_ifnz stop_wait
        return
@@ -224,6 +251,24 @@ power_retry
        pin_vh  p0_booster_userfault
        return
 
+;----------
+fault_spurious_tickdiv
+; does not return, instead continues with fault_tickdiv_rest
+       mov_lw  0xc1 ; SPURIOUS
+       call    serial_addbyte
+
+       mov_fw  fault_spurious_count
+       bra_n   fault_spurious_tickdiv_isoverflow
+fault_spurious_tickdiv_writeamt
+       call    serial_addbyte_another
+       clr_f   fault_spurious_count
+       bra     fault_tickdiv_rest
+
+;-----
+fault_spurious_tickdiv_isoverflow
+       mov_lw  0x7f
+       bra     fault_spurious_tickdiv_writeamt
+
 ;--------------------
 power_panichook @
        pin_vh  p0_booster_shutdown