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.
76 call polarity_master_init
77 call points_master_init
78 call common_local_init
86 ;----------------------------------------
90 call nmra_serialrx_intrl
92 call points_local_intrl
97 near_interrupt_high code
98 master_interrupt_high_notnmra
101 ;----------------------------------------------------------------------
102 serialrx_table_section code 0x2000
104 ;--------------------
106 ;command_<something> has same calling convention:
108 ; FSR0 -> start of message undefined
109 ; *FSR0 message undefined
111 ; ; INDF0=MM ww ww ww ww ii ii ii
112 rlc_fw INDF0 ; W = ww ww ww ww ii ii ii ?? C=MM Z=00
113 bra_c serialrx_if_multibyte
114 bra_z command_crashed
115 ; single-byte non-0 command, has to be ON or OFF
116 ; ie supposedly ; INDF0=zz zz II zz zz zz zz PP C=zz
117 rrc_fw INDF0 ; W = zz zz zz II zz zz zz zz C=PP
118 xor_lw 0x10 ; W = zz zz zz zz zz zz zz zz C=PP Z=OK
123 serialrx_if_multibyte
124 rr_fw INDF0 ; W = ii MM ww ww ww ww ii ii
125 and_lw 0x3c ; W = zz zz ww ww ww ww zz zz
126 bt_f_if0 PCL, 0 ; always true, but reads PCL
130 goto serialrx_bad ; 1 0000 xxx
131 goto command_ping ; 1 0001 xxx
132 goto command_polarity ; 1 0010 xxx
133 goto serialrx_bad ; 1 0011 xxx
134 goto command_point ; 1 0100 xxx
135 goto serialrx_bad ; 1 0101 xxx
136 goto serialrx_bad ; 1 0110 xxx
137 goto serialrx_bad ; 1 0111 xxx
138 goto serialrx_bad ; 1 1000 xxx
139 goto serialrx_bad ; 1 1001 xxx
140 goto serialrx_bad ; 1 1010 xxx
141 goto serialrx_bad ; 1 1011 xxx
142 goto serialrx_bad ; 1 1100 xxx
143 goto serialrx_bad ; 1 1101 xxx
144 goto serialrx_bad ; 1 1110 xxx
145 goto serialrx_bad ; 1 1111 xxx
147 goto serialrx_bad ; 0 0000 xxx
148 goto serialrx_bad ; 0 0001 xxx
149 goto serialrx_bad ; 0 0000 xxx
156 ;--------------------
162 bra_n command_ping_bad
163 goto serial_addbyte_another
165 command_ping_bad panic morse_HP
168 ;======================================================================
171 ;----------------------------------------
173 ; Slave-specific initialisation.
179 call common_local_init
180 call detect_slave_init
183 ;----------------------------------------
186 call points_local_intrl
189 ;----------------------------------------
194 ;----------------------------------------
199 bra i2csu_write_if_special
201 bra polarity_local_do
208 i2csu_write_if_special
210 bra i2csu_write_if_bad
211 goto panic_crashread_commanded
214 ;======================================================================
215 ; MASTER/SLAVE deviations
219 ; Either transmits the message to the master, or if we are the master,
220 ; handles it as an incoming message from the notional `slave 0'.
221 ; W message unchanged
223 bt_f_if0 idloc1,idloc1_master
224 goto slave_add_short_message
225 goto loopback_read_byte
227 ;======================================================================