1 ;======================================================================
2 ; MAIN PROGRAM AND GLUE
7 ;======================================================================
8 ; COMMON TO MASTER AND SLAVE
10 ;----------------------------------------
26 bs_f RCON, IPEN ; interrupt priorities
30 bt_f_if0 idloc1,idloc1_master
33 bt_f_if1 idloc1,idloc1_master
39 bt_f_if1 idloc1,idloc1_master
40 goto backgroundloop_master
41 bt_f_if1 idloc1,idloc1_boarddet
42 goto backgroundloop_detectors
43 goto backgroundloop_reversers
47 ; called by {master,slave}_init immediately after they've init'd i2c.
51 call points_local_init
52 call polarity_local_init
53 call detect_local_init
56 ;----------------------------------------
61 mov_ff isr_low_save_stkptr, STKPTR
64 ;======================================================================
67 ;----------------------------------------
69 ; Master-specific initialisation.
72 call polarity_master_init
73 call common_local_init
81 ;----------------------------------------
85 call nmra_serialrx_intrl
87 call points_local_intrl
92 master_interrupt_high_notnmra
95 ;----------------------------------------------------------------------
96 serialrx_table_section code 0x2000
100 ;command_<something> has same calling convention:
102 ; FSR0 -> start of message undefined
103 ; *FSR0 message undefined
105 ; ; INDF0=MM ww ww ww ww ii ii ii
106 rlc_fw INDF0 ; W = ww ww ww ww ii ii ii ?? C=MM Z=00
107 bra_c serialrx_if_multibyte
108 bra_z command_crashed
109 ; single-byte non-0 command, has to be ON or OFF
110 ; ie supposedly ; INDF0=zz zz II zz zz zz zz PP C=zz
111 rrc_fw INDF0 ; W = zz zz zz II zz zz zz zz C=PP
112 xor_lw 0x10 ; W = zz zz zz zz zz zz zz zz C=PP Z=OK
117 serialrx_if_multibyte
118 rr_fw INDF0 ; W = ii MM ww ww ww ww ii ii
119 and_lw 0x3c ; W = zz zz ww ww ww ww zz zz
120 bt_f_if0 PCL, 0 ; always true, but reads PCL
124 goto serialrx_bad ; 1 0000 xxx
125 goto command_ping ; 1 0001 xxx
126 goto command_polarity ; 1 0010 xxx
127 goto serialrx_bad ; 1 0011 xxx
128 goto command_point ; 1 0100 xxx
129 goto serialrx_bad ; 1 0101 xxx
130 goto serialrx_bad ; 1 0110 xxx
131 goto serialrx_bad ; 1 0111 xxx
132 goto serialrx_bad ; 1 1000 xxx
133 goto serialrx_bad ; 1 1001 xxx
134 goto serialrx_bad ; 1 1010 xxx
135 goto serialrx_bad ; 1 1011 xxx
136 goto serialrx_bad ; 1 1100 xxx
137 goto serialrx_bad ; 1 1101 xxx
138 goto serialrx_bad ; 1 1110 xxx
139 goto serialrx_bad ; 1 1111 xxx
141 goto serialrx_bad ; 0 0000 xxx
142 goto serialrx_bad ; 0 0001 xxx
143 goto serialrx_bad ; 0 0000 xxx
150 ;--------------------
156 bra_n command_ping_bad
157 goto serial_addbyte_another
159 command_ping_bad panic morse_HP
161 ;--------------------
165 ;======================================================================
168 ;----------------------------------------
170 ; Slave-specific initialisation.
176 call common_local_init
177 call detect_slave_init
180 ;----------------------------------------
183 call points_local_intrl
186 ;----------------------------------------
191 ;----------------------------------------
196 bra i2csu_write_if_special
198 bra polarity_local_do
205 i2csu_write_if_special
207 bra i2csu_write_if_bad
208 goto panic_crashread_commanded
211 ;======================================================================
212 ; MASTER/SLAVE deviations
216 ; Either transmits the message to the master, or if we are the master,
217 ; handles it as an incoming message from the notional `slave 0'.
218 ; W message unchanged
220 bt_f_if0 idloc1,idloc1_master
221 goto slave_add_short_message
222 goto loopback_read_byte
224 ;======================================================================