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 ;----------------------------------------
64 intrl_handled_routine @
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
85 call power_polarising_init
91 ;----------------------------------------
92 master_interrupt_low @
95 call nmra_serialrx_intrl
96 call power_fault_intrl
100 mov_ff INTCON, xdebug+5
101 call serialtxfc_intrl
103 call points_local_intrl
108 ;----------------------------------------------------------------------
109 serialrx_table_section code 0x2000
111 ;--------------------
112 serialrx_generalmsg @
113 ;command_<something> has same calling convention:
115 ; FSR0 -> start of message undefined
116 ; *FSR0 message undefined
119 bra_n serialrx_if_multibyte
120 bra_z command_crashed
123 bra_z command_power_on
125 bra_z command_power_off
129 serialrx_if_multibyte
130 rr_fw INDF0 ; W = ii MM ww ww ww ww ii ii
131 and_lw 0x3c ; W = zz zz ww ww ww ww zz zz
132 bt_f_if0 PCL, 0 ; always true, but reads PCL
136 goto serialrx_bad ; 1 0000 xxx
137 goto command_ping ; 1 0001 xxx
138 goto command_polarity ; 1 0010 xxx
139 goto serialrx_bad ; 1 0011 xxx
140 goto command_point ; 1 0100 xxx
141 goto serialrx_bad ; 1 0101 xxx
142 goto serialrx_bad ; 1 0110 xxx
143 goto serialrx_bad ; 1 0111 xxx
144 goto serialrx_bad ; 1 1000 xxx
145 goto serialrx_bad ; 1 1001 xxx
146 goto serialrx_bad ; 1 1010 xxx
147 goto serialrx_bad ; 1 1011 xxx
148 goto serialrx_bad ; 1 1100 xxx
149 goto serialrx_bad ; 1 1101 xxx
150 goto serialrx_bad ; 1 1110 xxx
151 goto serialrx_bad ; 1 1111 xxx
159 ;--------------------
165 bra_n command_ping_bad
166 goto serial_addbyte_another
168 command_ping_bad panic morse_HP
170 ;======================================================================
173 ;----------------------------------------
175 ; Slave-specific initialisation.
181 call common_local_init
182 call detect_slave_init
185 ;----------------------------------------
186 slave_interrupt_low @
188 call points_local_intrl
191 ;----------------------------------------
196 ;----------------------------------------
201 bra i2csu_write_if_special
203 bra polarity_local_do
210 i2csu_write_if_special
212 bra i2csu_write_if_bad
213 goto panic_crashread_commanded
216 ;======================================================================
217 ; MASTER/SLAVE deviations
221 ; Either transmits the message to the master, or if we are the master,
222 ; handles it as an incoming message from the notional `slave 0'.
223 ; W message unchanged
225 bt_f_if0 idloc1,idloc1_master
226 goto slave_add_short_message
227 goto loopback_read_byte
229 ;======================================================================