1 ;======================================================================
2 ; MAIN PROGRAM AND GLUE
7 ;======================================================================
8 ; COMMON TO MASTER AND SLAVE
10 ;----------------------------------------
26 bs_f RCON, IPEN ; interrupt priorities
31 bt_f_if0 idloc1,idloc1_master
34 bt_f_if1 idloc1,idloc1_master
40 bt_f_if1 idloc1,idloc1_master
41 goto backgroundloop_master
42 bt_f_if1 idloc1,idloc1_boarddet
43 goto backgroundloop_detectors
44 goto backgroundloop_reversers
48 ; called by {master,slave}_init immediately after they've init'd i2c.
52 call points_local_init
53 call polarity_local_init
54 call detect_local_init
57 ;----------------------------------------
65 mov_ff isr_low_save_stkptr, STKPTR
68 ;======================================================================
71 ;----------------------------------------
73 ; Master-specific initialisation.
77 call polarity_master_init
78 call points_master_init
79 call common_local_init
84 call power_polarising_init
88 ;----------------------------------------
91 mov_ff INTCON, xdebug+0
92 mov_ff INTCON2, xdebug+1
93 mov_ff INTCON3, xdebug+2
98 call nmra_serialrx_intrl
99 call power_fault_intrl
100 call serialtxfc_intrl
102 call points_local_intrl
106 ;----------------------------------------------------------------------
107 serialrx_table_section code 0x2000
109 ;--------------------
111 ;command_<something> has same calling convention:
113 ; FSR0 -> start of message undefined
114 ; *FSR0 message undefined
116 ; ; INDF0=MM ww ww ww ww ii ii ii
117 rlc_fw INDF0 ; W = ww ww ww ww ii ii ii ?? C=MM Z=00
118 bra_c serialrx_if_multibyte
119 bra_z command_crashed
120 ; single-byte non-0 command, has to be ON or OFF
121 ; ie supposedly ; INDF0=zz zz II zz zz zz zz PP C=zz
122 rrc_fw INDF0 ; W = zz zz zz II zz zz zz zz C=PP
123 xor_lw 0x10 ; W = zz zz zz zz zz zz zz zz C=PP Z=OK
128 serialrx_if_multibyte
129 rr_fw INDF0 ; W = ii MM ww ww ww ww ii ii
130 and_lw 0x3c ; W = zz zz ww ww ww ww zz zz
131 bt_f_if0 PCL, 0 ; always true, but reads PCL
135 goto serialrx_bad ; 1 0000 xxx
136 goto command_ping ; 1 0001 xxx
137 goto command_polarity ; 1 0010 xxx
138 goto serialrx_bad ; 1 0011 xxx
139 goto command_point ; 1 0100 xxx
140 goto serialrx_bad ; 1 0101 xxx
141 goto serialrx_bad ; 1 0110 xxx
142 goto serialrx_bad ; 1 0111 xxx
143 goto serialrx_bad ; 1 1000 xxx
144 goto serialrx_bad ; 1 1001 xxx
145 goto serialrx_bad ; 1 1010 xxx
146 goto serialrx_bad ; 1 1011 xxx
147 goto serialrx_bad ; 1 1100 xxx
148 goto serialrx_bad ; 1 1101 xxx
149 goto serialrx_bad ; 1 1110 xxx
150 goto serialrx_bad ; 1 1111 xxx
152 goto serialrx_bad ; 0 0000 xxx
153 goto serialrx_bad ; 0 0001 xxx
154 goto serialrx_bad ; 0 0000 xxx
161 ;--------------------
167 bra_n command_ping_bad
168 goto serial_addbyte_another
170 command_ping_bad panic morse_HP
173 ;======================================================================
176 ;----------------------------------------
178 ; Slave-specific initialisation.
184 call common_local_init
185 call detect_slave_init
188 ;----------------------------------------
191 call points_local_intrl
194 ;----------------------------------------
199 ;----------------------------------------
204 bra i2csu_write_if_special
206 bra polarity_local_do
213 i2csu_write_if_special
215 bra i2csu_write_if_bad
216 goto panic_crashread_commanded
219 ;======================================================================
220 ; MASTER/SLAVE deviations
224 ; Either transmits the message to the master, or if we are the master,
225 ; handles it as an incoming message from the notional `slave 0'.
226 ; W message unchanged
228 bt_f_if0 idloc1,idloc1_master
229 goto slave_add_short_message
230 goto loopback_read_byte
232 ;======================================================================