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 ;----------------------------------------
92 call nmra_serialrx_intrl
93 call power_fault_intrl
95 call points_local_intrl
99 ;----------------------------------------------------------------------
100 serialrx_table_section code 0x2000
102 ;--------------------
104 ;command_<something> has same calling convention:
106 ; FSR0 -> start of message undefined
107 ; *FSR0 message undefined
109 ; ; INDF0=MM ww ww ww ww ii ii ii
110 rlc_fw INDF0 ; W = ww ww ww ww ii ii ii ?? C=MM Z=00
111 bra_c serialrx_if_multibyte
112 bra_z command_crashed
113 ; single-byte non-0 command, has to be ON or OFF
114 ; ie supposedly ; INDF0=zz zz II zz zz zz zz PP C=zz
115 rrc_fw INDF0 ; W = zz zz zz II zz zz zz zz C=PP
116 xor_lw 0x10 ; W = zz zz zz zz zz zz zz zz C=PP Z=OK
121 serialrx_if_multibyte
122 rr_fw INDF0 ; W = ii MM ww ww ww ww ii ii
123 and_lw 0x3c ; W = zz zz ww ww ww ww zz zz
124 bt_f_if0 PCL, 0 ; always true, but reads PCL
128 goto serialrx_bad ; 1 0000 xxx
129 goto command_ping ; 1 0001 xxx
130 goto command_polarity ; 1 0010 xxx
131 goto serialrx_bad ; 1 0011 xxx
132 goto command_point ; 1 0100 xxx
133 goto serialrx_bad ; 1 0101 xxx
134 goto serialrx_bad ; 1 0110 xxx
135 goto serialrx_bad ; 1 0111 xxx
136 goto serialrx_bad ; 1 1000 xxx
137 goto serialrx_bad ; 1 1001 xxx
138 goto serialrx_bad ; 1 1010 xxx
139 goto serialrx_bad ; 1 1011 xxx
140 goto serialrx_bad ; 1 1100 xxx
141 goto serialrx_bad ; 1 1101 xxx
142 goto serialrx_bad ; 1 1110 xxx
143 goto serialrx_bad ; 1 1111 xxx
145 goto serialrx_bad ; 0 0000 xxx
146 goto serialrx_bad ; 0 0001 xxx
147 goto serialrx_bad ; 0 0000 xxx
154 ;--------------------
160 bra_n command_ping_bad
161 goto serial_addbyte_another
163 command_ping_bad panic morse_HP
166 ;======================================================================
169 ;----------------------------------------
171 ; Slave-specific initialisation.
177 call common_local_init
178 call detect_slave_init
181 ;----------------------------------------
184 call points_local_intrl
187 ;----------------------------------------
192 ;----------------------------------------
197 bra i2csu_write_if_special
199 bra polarity_local_do
206 i2csu_write_if_special
208 bra i2csu_write_if_bad
209 goto panic_crashread_commanded
212 ;======================================================================
213 ; MASTER/SLAVE deviations
217 ; Either transmits the message to the master, or if we are the master,
218 ; handles it as an incoming message from the notional `slave 0'.
219 ; W message unchanged
221 bt_f_if0 idloc1,idloc1_master
222 goto slave_add_short_message
223 goto loopback_read_byte
225 ;======================================================================