1 ;======================================================================
2 ; MAIN PROGRAM AND GLUE
7 ;======================================================================
8 ; COMMON TO MASTER AND SLAVE
10 ;----------------------------------------
13 bs_f RCON, IPEN ; interrupt priorities
17 bt_f_if0 idloc1,idloc1_master
20 bt_f_if1 idloc1,idloc1_master
26 bt_f_if1 idloc1,idloc1_master
27 goto backgroundloop_master
28 bt_f_if1 idloc1,idloc1_boarddet
29 goto backgroundloop_detectors
30 goto backgroundloop_reversers
34 ; called by {master,slave}_init immediately after they've init'd i2c.
38 call points_local_init
39 call polarity_local_init
40 call detect_local_init
43 ;----------------------------------------
50 intrl_handled_routine @
51 mov_ff isr_low_save_stkptr, STKPTR
54 ;======================================================================
57 ;----------------------------------------
59 ; Master-specific initialisation.
65 call polarity_master_init
66 call points_master_init
67 call common_local_init
73 call power_polarising_init
79 ;----------------------------------------
80 master_interrupt_low @
85 call nmra_serialrx_intrl
87 call power_fault_intrl
93 call points_local_intrl
99 ;----------------------------------------------------------------------
100 serialrx_table_section code 0x2000
102 ;--------------------
103 serialrx_generalmsg @
104 ;command_<something> has same calling convention:
106 ; FSR0 -> start of message undefined
107 ; *FSR0 message undefined
110 bra_n serialrx_if_multibyte
111 bra_z command_crashed
114 bra_z command_power_on
116 bra_z command_power_off
120 serialrx_if_multibyte
121 rr_fw INDF0 ; W = ii MM ww ww ww ww ii ii
122 and_lw 0x3c ; W = zz zz ww ww ww ww zz zz
123 bt_f_if0 PCL, 0 ; always true, but reads PCL
127 goto serialrx_bad ; 1 0000 xxx
128 goto command_ping ; 1 0001 xxx
129 goto command_polarity ; 1 0010 xxx
130 goto command_watchdog ; 1 0011 xxx
131 goto command_point ; 1 0100 xxx
132 goto serialrx_bad ; 1 0101 xxx
133 goto serialrx_bad ; 1 0110 xxx
134 goto serialrx_bad ; 1 0111 xxx
135 goto serialrx_bad ; 1 1000 xxx
136 goto serialrx_bad ; 1 1001 xxx
137 goto serialrx_bad ; 1 1010 xxx
138 goto serialrx_bad ; 1 1011 xxx
139 goto serialrx_bad ; 1 1100 xxx
140 goto serialrx_bad ; 1 1101 xxx
141 goto serialrx_bad ; 1 1110 xxx
142 goto serialrx_bad ; 1 1111 xxx
150 ;--------------------
156 bra_n command_ping_bad
157 goto serial_addbyte_another
159 command_ping_bad panic morse_HP
161 ;======================================================================
164 ;----------------------------------------
166 ; Slave-specific initialisation.
174 call common_local_init
175 call detect_slave_init
178 ;----------------------------------------
179 slave_interrupt_low @
181 call points_local_intrl
184 ;----------------------------------------
189 ;----------------------------------------
194 bra i2csu_write_if_special
196 bra polarity_local_do
203 i2csu_write_if_special
205 bra i2csu_write_if_bad
206 goto panic_crashread_commanded
209 ;======================================================================
210 ; MASTER/SLAVE deviations
214 ; Either transmits the message to the master, or if we are the master,
215 ; handles it as an incoming message from the notional `slave 0'.
216 ; W message unchanged
218 bt_f_if0 idloc1,idloc1_master
219 goto slave_add_short_message
220 goto loopback_read_byte
222 ;======================================================================