;
; See i2clib.asm for documentation of the interface to this file.
- include /usr/share/gputils/header/p18f458.inc
- radix dec
- include ../iwjpictest/insn-aliases.inc
+ include /usr/share/gputils/header/p18f458.inc
+ radix dec
+ include ../iwjpictest/insn-aliases.inc
- include ../iwjpictest/clockvaries.inc
- include panic.inc
- include morse+auto.inc
- include i2clib.incm
+ include ../iwjpictest/clockvaries.inc
+ include panic.inc
+ include morse+auto.inc
+ include i2clib.incm
;======================================================================
; NOTATION
udata_acs
-sspstat res 1
-sspcon1 res 1
+sspstat res 1 ; master only
+sspcon1 res 1 ; master only
sspcon2 res 1 ; master only
slave res 1 ; master only
slave_next res 1 ; master only
; slave any slave_number
; expects to return directly to main program (caller)
mov_wf slave
- bra_z m_improper_slave
bs_f SSPCON2, SEN
m_start_or_restart
and_lw ~31
bra_nz m_improper_slave
bs_f st, st_starting
+ tst_f_ifnz slave
return
+ ; oops:
+;...
+
+m_improper_slave
+; slave slave number
+ i2cpanic morse_SN
+
;----------
m_event_done_starting
;----------
m_event_done_addressing
bt_f_if1 sspcon2, ACKSTAT
- bra m_bad_address_ack
+ bra m_no_address_ack
; OK, we got ack.
bc_f st, st_addressing
goto i2cmu_done
;----------
-m_bad_address_ack
- i2cpanic morse_SK
+m_no_address_ack
+ bt_f_if0 st, st_reading
+ bra m_bad_no_address_ack_write
+ clr_f st
+ rcall m_stop
+ goto i2cmu_slave_no_ack
-;----------
-m_improper_slave
-; slave slave number
- i2cpanic morse_SN
+m_bad_no_address_ack_write
+ panic morse_SW
;========================================
; MASTER - WRITING
m_address_different
; Main program would like to address another slave for reading.
mov_wf slave_next
- bra_z m_improper_slave
+ tst_f_ifnz slave_next
bra i2cm_read_done
+ panic morse_SO
;----------
m_event_done_addressing_read
set_f sspcon1
set_f sspcon2
set_f st_orig
- bs_f TRISB, 0
- bs_f TRISB, 1
+ bs_f TRISC, 3
+ bs_f TRISC, 4
bs_f SSPCON1, SSPEN
bs_f PIE1, SSPIE
return
;----------
; Macros: chkvals_start and chkval
-chkvals_start macro what
- mov_fw what
+chkvals_start macro chvals_what
+ mov_fw chvals_what
endm
-chkval macro lastval, value, label
- xor_lw value ^ lastval
- bra_z label
+chkval macro chkval_lastval, chkval_value, chkval_label
+ xor_lw chkval_value ^ chkval_lastval
+ bra_z chkval_label
endm
near_i2csu code
;======================================================================
- include panic.fin
- include i2clib.inc
+ include program+externs.fin
+ include i2clib.inc
- end
+ end