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Commit | Line | Data |
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64219415 FZ |
1 | ; Virtual Ports for the BIOS Interaction |
2 | ; | |
98979541 | 3 | ; Copyright (C) 2010-2013 Leo C. |
64219415 FZ |
4 | ; |
5 | ; This file is part of avrcpm. | |
6 | ; | |
7 | ; avrcpm is free software: you can redistribute it and/or modify it | |
8 | ; under the terms of the GNU General Public License as published by | |
9 | ; the Free Software Foundation, either version 3 of the License, or | |
10 | ; (at your option) any later version. | |
11 | ; | |
12 | ; avrcpm is distributed in the hope that it will be useful, | |
13 | ; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | ; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | ; GNU General Public License for more details. | |
16 | ; | |
17 | ; You should have received a copy of the GNU General Public License | |
18 | ; along with avrcpm. If not, see <http://www.gnu.org/licenses/>. | |
19 | ; | |
20 | ; $Id$ | |
29ce189c L |
21 | ; |
22 | ||
23 | ||
24 | ; | |
25 | ; Port Direction Function | |
26 | ;hex dez | |
27 | ;------------------------------------------------------------------------- | |
28 | ;00 0 in - Con status. | |
29 | ; Returns 0xFF if the UART has a byte, 0 otherwise. | |
30 | ;01 1 in/out - Console input, aka UDR. / Console Output | |
31 | ;02 2 out - Console Output (deprecated) | |
32 | ;03 3 in - "UART" status: bit 0 = rx, bit 1 = tx | |
33 | ;04 4 in - "UART" data register, no wait | |
34 | ; | |
d8fa6a36 L |
35 | ;------------------------ Virtual I2C interface -------------------------- |
36 | ;05 5 out - Control Port: 1 = Start read operation | |
37 | ; 2 = Start write operation | |
38 | ;05 5 in - Status of last Transfer: 0 = ok, else fail | |
39 | ;06 6 in/out - Number of bytes to transfer, including Slave address | |
40 | ;07,08 7,8 in/out - Read/Write address low/high | |
41 | ; | |
42 | ;------------------------ Disk I/O --------------------------------------- | |
29ce189c L |
43 | ;0D,0E 13,14 in/out - Set address of Bios Controll Block |
44 | ;0F 15 in/out - Disk select | |
45 | ;10,11 16,17 in/out - Track select | |
46 | ;12,13 18,19 in/out - Sector select | |
47 | ;14,15 20,21 in/out - Write addr | |
48 | ; | |
49 | ;16 22 out - Trigger disk i/o operations | |
50 | ; Bit 7 = 1: Read sector | |
51 | ; Bit 6 = 1: Write sector | |
52 | ; Bit 5 = 1: BIOS WBOOT | |
53 | ; Bit 4 = 1: BIOS Home | |
54 | ; Only one of bits 4..7 may be set. | |
55 | ; If Write function (bit 6=1): | |
56 | ; Bits 0..2: 0 - write to allocated | |
57 | ; 1 - write to directory | |
58 | ; 2 - write unallocated | |
59 | ; 3 - write to directory | |
60 | ; | |
61 | ;16 22 in - Result of last read/write operation. | |
62 | ; 0x00 = ok, 0xff = error (--> Bad Sector) | |
63 | ; | |
d8fa6a36 | 64 | ; |
98979541 L |
65 | ;------------------------ ADC Interface ---------------------------------- |
66 | ;17-19 23,25 in - ADC Channels 6,7 and 8 (Temp-Sensor) | |
67 | ; ADC 6,7 only Devices in 32 pin Case (TQFP/MLF) | |
68 | ; 8 Bit only | |
69 | ; Fixed ADC clock (FCPU/128, 156KHz at 20MHz CPU) | |
70 | ; Vref = VCC | |
71 | ;20,21 in - ADC: Measure VCC | |
d8fa6a36 L |
72 | ; |
73 | ;------------------------ Wall Clock and Timers -------------------------- | |
5482d75f | 74 | ;40 64-71 in/out - Timer/Clock control. |
fb050095 L |
75 | ;41-46 |
76 | ; | |
d8fa6a36 L |
77 | ;47-4D clock - BCD format: ss, mm, hh, DD, MM, YYl, YYh |
78 | ; | |
98979541 L |
79 | ;4F debug - start/stop trace, print stack, ... |
80 | ; | |
d8fa6a36 L |
81 | ;------------------------ Ports ------------------------------------------ |
82 | ;80-87 in/out - Port-Expander PCF8574 (max. 8 Chips) | |
83 | ;88-8F in/out - Port-Expander PCF8574A (not implemented yet!) | |
29ce189c L |
84 | |
85 | ||
64219415 | 86 | ; ---------------------------------------------- Start of Code Segment |
98979541 | 87 | |
29ce189c L |
88 | .cseg |
89 | vport_tbl: | |
90 | .db 00,1 ;Port 0, length 1 | |
91 | .dw conStatus ; in | |
92 | .dw dbgOut ; out | |
93 | .db 01,1 | |
94 | .dw uartgetc | |
95 | .dw uartputc | |
96 | .db 02,1 ;Port 2 (old console output) | |
97 | .dw uartgetc ; filler | |
98 | .dw uartputc ; deprecated | |
99 | .db 03,1 | |
100 | .dw uartstat | |
101 | .dw vport_out_dummy | |
102 | .db 04,1 | |
103 | .dw uartin | |
104 | .dw uartout | |
105 | ||
fb050095 | 106 | .db 13,9 ; Port 13-21, (length 9) |
5482d75f L |
107 | .dw dsk_param_get |
108 | .dw dsk_param_set | |
29ce189c L |
109 | .db 22,1 |
110 | .dw dskErrorRet | |
111 | .dw dskDoIt | |
112 | ||
113 | .db TIMERPORT,7 | |
fb050095 L |
114 | .dw utimeget |
115 | .dw utimeput | |
116 | ||
d8fa6a36 | 117 | .db CLOCKPORT,7 ;Clock format (bcd): ss, mm, hh, DD, MM, YYl, YYh |
29ce189c L |
118 | .dw clockget |
119 | .dw clockput | |
80e1fa71 L |
120 | |
121 | .db DEBUGPORT,1 | |
122 | .dw dbg_stat | |
123 | .dw dbg_ctrl | |
d8fa6a36 | 124 | |
825ecc9d | 125 | #if I2C_SUPPORT |
d8fa6a36 L |
126 | .db I2CCTRL,1 |
127 | .dw vi2c_stat_get | |
128 | .dw vi2c_ctrl | |
129 | ||
130 | .db I2CBLEN,3 ; | |
131 | .dw vi2c_param_get | |
132 | .dw vi2c_param_set | |
133 | ||
134 | .db PORT,8 | |
135 | .dw pcf8574_in | |
136 | .dw pcf8574_out | |
137 | #endif | |
98979541 L |
138 | #if ADC_SUPPORT |
139 | .db ADC80,3 ;2 Channels ADC80 ADC81 + Temp Sensor | |
140 | .dw adc_read8 | |
141 | .dw vport_out_dummy | |
d8fa6a36 | 142 | |
98979541 L |
143 | .db 0x20,2 ; |
144 | .dw adc_readvcc | |
145 | .dw vport_out_dummy | |
146 | #endif | |
29ce189c L |
147 | .db 0,0 ; Stop mark |
148 | ||
149 | ;--------------------------------------------------------------------- | |
150 | ||
151 | ;Called with port in temp2 and value in temp. | |
152 | portWrite: | |
153 | set | |
154 | rjmp vprw_start | |
155 | ||
156 | ;Called with port in temp2. Should return value in temp. | |
157 | portRead: | |
158 | clt | |
159 | ||
160 | vprw_start: | |
e7a0f403 L |
161 | push yh |
162 | push yl | |
29ce189c L |
163 | .if PORT_DEBUG > 1 |
164 | tst temp2 | |
165 | brne dvp_1 ;don't debug console status | |
166 | brts dvp_1 | |
167 | rjmp conStatus | |
168 | dvp_1: | |
169 | printnewline | |
170 | brts dvp_11 | |
171 | printstring "Port In: " | |
172 | rjmp dvp_12 | |
173 | dvp_11: | |
174 | printstring "Port Out: " | |
175 | dvp_12: | |
176 | push temp | |
177 | mov temp,temp2 | |
178 | rcall printhex | |
179 | pop temp | |
180 | .endif | |
181 | ldiw z,vport_tbl*2 | |
182 | ||
183 | vprw_loop: | |
184 | lpm _tmp0,z+ | |
825ecc9d L |
185 | lpm _tmp1,z+ ;length |
186 | cp _tmp1,_0 | |
29ce189c L |
187 | breq vprw_exit ;no more ports |
188 | ||
189 | mov temp3,temp2 | |
190 | sub temp3,_tmp0 ;base port | |
191 | brcs vprw_next ;port # too high | |
825ecc9d | 192 | cp temp3,_tmp1 ;may be in range |
29ce189c L |
193 | brcs vprw_found ; |
194 | vprw_next: ;port # not in range, test next block. | |
195 | adiw z,4 | |
196 | rjmp vprw_loop | |
197 | vprw_found: | |
d8fa6a36 L |
198 | brtc PC+2 ;read or write? |
199 | adiw z,2 ;skip read function pointer | |
29ce189c | 200 | lpm _tmp0,z+ |
825ecc9d L |
201 | lpm zh,z |
202 | mov zl,_tmp0 | |
29ce189c L |
203 | |
204 | .if PORT_DEBUG > 1 | |
205 | push temp2 | |
206 | push temp | |
207 | printstring ", exec: " | |
208 | movw temp,z | |
209 | rcall printhexw | |
210 | printstring ", rel port: " | |
211 | mov temp,temp3 | |
212 | rcall printhex | |
213 | pop temp | |
214 | pop temp2 | |
215 | printstring ", val: " | |
216 | brts dvp_2 | |
217 | icall | |
218 | rcall printhex | |
219 | printstring " " | |
e7a0f403 L |
220 | pop yl |
221 | pop yh | |
29ce189c L |
222 | ret |
223 | dvp_2: | |
224 | rcall printhex | |
225 | printstring " " | |
e7a0f403 L |
226 | ; relative port # in temp3 |
227 | icall | |
228 | pop yl | |
229 | pop yh | |
230 | ret | |
29ce189c | 231 | .else |
e7a0f403 L |
232 | icall |
233 | pop yl | |
234 | pop yh | |
235 | ret | |
29ce189c L |
236 | .endif |
237 | ||
238 | vprw_exit: | |
239 | ; trap for nonexistent port? | |
240 | .if PORT_DEBUG > 1 | |
241 | printstring ", not found!" | |
242 | .endif | |
29ce189c | 243 | ldi temp,0xff |
e7a0f403 L |
244 | pop yl |
245 | pop yh | |
29ce189c | 246 | ret |
825ecc9d L |
247 | |
248 | vport_out_dummy: | |
249 | ret | |
29ce189c | 250 | |
64219415 FZ |
251 | uartstat: |
252 | clr temp | |
253 | lds temp2,rxcount | |
254 | cpse temp2,_0 | |
255 | sbr temp,0x01 | |
256 | lds temp2,txcount | |
257 | cpi temp2,TXBUFSIZE | |
258 | breq uartst_1 | |
259 | sbr temp,0x02 | |
260 | uartst_1: | |
261 | ret | |
262 | ||
29ce189c L |
263 | uartin: |
264 | clr temp | |
265 | lds temp2,rxcount | |
266 | cpse temp2,_0 | |
08716d4f | 267 | ljmp uartgetc |
29ce189c L |
268 | ret |
269 | ||
64219415 FZ |
270 | uartout: |
271 | lds temp2,txcount | |
272 | cpi temp2,TXBUFSIZE | |
273 | breq uartout_1 | |
08716d4f | 274 | ljmp uartputc |
64219415 FZ |
275 | uartout_1: |
276 | ret | |
277 | ||
29ce189c | 278 | |
64219415 FZ |
279 | conStatus: |
280 | lds temp,rxcount | |
281 | cpse temp,_0 | |
282 | ldi temp,0xff | |
283 | ret | |
284 | ||
64219415 FZ |
285 | |
286 | dbgOut: | |
287 | printnewline | |
288 | printstring "Debug: " | |
08716d4f | 289 | lcall printhex |
64219415 FZ |
290 | ret |
291 | ||
80e1fa71 L |
292 | dbg_stat: |
293 | ldi temp,0 | |
294 | ret | |
295 | ||
296 | dbg_ctrl: | |
297 | bmov intstat,i_trace, temp,0 | |
98979541 L |
298 | .if SRAM_FILL |
299 | sbrc temp,1 | |
300 | lcall stackusage_print | |
301 | .endif | |
80e1fa71 L |
302 | ret |
303 | ||
304 | ||
305 | ||
64219415 | 306 | ;--------------------------------------------------------------------- |
29ce189c L |
307 | ; vim:set ts=8 noet nowrap |
308 |