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Commit | Line | Data |
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6efd6291 | 1 | ; Hardware initialisation, disk, mmc, timer, DRAM test |
9c15f366 L |
2 | ; |
3 | ; Copyright (C) 2010 Sprite_tm | |
dc705dc0 | 4 | ; Copyright (C) 2010-2013 Leo C. |
9c15f366 L |
5 | ; |
6 | ; This file is part of avrcpm. | |
7 | ; | |
8 | ; avrcpm is free software: you can redistribute it and/or modify it | |
9 | ; under the terms of the GNU General Public License as published by | |
10 | ; the Free Software Foundation, either version 3 of the License, or | |
11 | ; (at your option) any later version. | |
12 | ; | |
13 | ; avrcpm is distributed in the hope that it will be useful, | |
14 | ; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | ; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | ; GNU General Public License for more details. | |
17 | ; | |
18 | ; You should have received a copy of the GNU General Public License | |
19 | ; along with avrcpm. If not, see <http://www.gnu.org/licenses/>. | |
20 | ; | |
21 | ; $Id$ | |
22 | ; | |
23 | ||
24 | #define REFR_PRE 8 /* timer prescale factor 1/8 */ | |
25 | #define REFR_CS 0x02 /* timer clock select for 1/8 */ | |
26 | #define REFR_CNT F_CPU / REFR_RATE / REFR_PRE | |
27 | ||
28 | .cseg | |
29 | regval_tab: | |
30 | .db 0,0 | |
31 | .db 0xFE,0xFC ; _RAS0 _CAS0 | |
32 | .db 0xF8,0xF4 ; _OE _WE | |
33 | .db 255,0 ; _255 _0 | |
34 | regval_tab_e: | |
35 | ||
36 | start: | |
37 | ldi temp,low(RAMEND) ; top of memory | |
38 | out SPL,temp ; init stack pointer | |
39 | ldi temp,high(RAMEND) ; top of memory | |
40 | out SPH,temp ; init stack pointer | |
41 | ||
42 | ; - Load some registers with constant values | |
43 | ||
44 | ldiw z,regval_tab*2 | |
45 | ldiw y,0 | |
46 | cp_l: lpm xh,z+ | |
47 | st y+,xh | |
48 | cpi zl,low(regval_tab_e*2) | |
49 | brne cp_l | |
50 | ||
51 | ; - Kill wdt | |
52 | ||
53 | wdr | |
54 | out MCUSR,_0 | |
55 | ||
56 | ldi temp,(1<<WDCE) | (1<<WDE) | |
57 | outm8 WDTCSR,temp | |
58 | ldi temp,(1<<WDCE) | |
59 | outm8 WDTCSR,temp | |
60 | ||
61 | ; - Setup Ports | |
62 | ||
825ecc9d L |
63 | ; ldi temp,(1<<PUD) ;disable pullups |
64 | ; outm8 P_PUD,temp | |
65 | out PORTD,_255 ;all pins high (enables pullup on input ports) | |
9c15f366 L |
66 | out PORTB,_255 |
67 | out PORTC,_255 | |
68 | out DDRD,_255 ; all outputs | |
69 | out DDRB,_255 | |
70 | out DDRC,_255 | |
71 | cbi P_RXD-1,RXD ; RXD pin is input | |
72 | ||
73 | outm8 TIMSK1,_0 | |
74 | outm8 TIMSK2,_0 | |
75 | outm8 TCCR2A,_0 | |
76 | outm8 TCCR2B,_0 | |
77 | ||
78 | ; - Clear RAM | |
79 | ||
80 | ldiw z,SRAM_START | |
81 | ldi temp2,high(ramtop) | |
98979541 | 82 | clr_loop: |
9c15f366 L |
83 | st z+,_0 |
84 | cpi zl,low(ramtop) | |
85 | cpc zh,temp2 | |
98979541 L |
86 | brne clr_loop |
87 | ||
88 | ; - Fill unused RAM (stack) | |
89 | ||
90 | ldi temp2,high(RAMEND+1) | |
91 | ldi temp,SRAMFILL_VAL | |
92 | fill_loop: | |
93 | st z+,temp | |
94 | cpi zl,low(RAMEND+1) | |
95 | cpc zh,temp2 | |
96 | brne fill_loop | |
9c15f366 | 97 | |
9c15f366 L |
98 | ; Init clock/timer system |
99 | ||
100 | ; Init timer 1 as 1 ms system clock tick. | |
101 | ||
102 | ldi temp, low (F_CPU/1000) | |
103 | ldi temp2,high(F_CPU/1000) | |
104 | outm8 OCR1BH,temp2 | |
105 | outm8 OCR1BL,temp | |
106 | ldi temp,(1<<ICNC1)|(1<<CS10) ;Noise cancel, fall. edge, Normal Mode, clk/1 | |
107 | outm8 TCCR1B,temp | |
108 | inm8 temp,TIMSK1 | |
109 | ori temp,(1<<OCIE1B) ;Enable 1ms int. | |
110 | outm8 TIMSK1,temp | |
111 | ||
112 | ; - Init serial port | |
113 | ||
114 | rcall uart_init | |
115 | ||
825ecc9d | 116 | ;Init timer2. Refresh-call should happen every (8ms/512) cycles. |
9c15f366 L |
117 | |
118 | ldi temp,REFR_CNT*2 ; 2 cycles per int | |
119 | outm8 OCR2A,temp | |
120 | inm8 temp,TCCR2A | |
121 | ori temp,(1<<WGM21) ;CTC mode | |
122 | outm8 TCCR2A,temp | |
123 | inm8 temp,TCCR2B | |
124 | ori temp,REFR_CS ;clk/REFR_PRE | |
125 | outm8 TCCR2B,temp | |
126 | inm8 temp,TIMSK2 | |
127 | ori temp, (1<<OCIE2A) | |
128 | outm8 TIMSK2,temp | |
129 | ||
130 | sei | |
131 | ||
dc705dc0 | 132 | #if I2C_SUPPORT |
d8fa6a36 L |
133 | rcall i2c_init ; Init I2C master |
134 | rcall rtc_get | |
135 | #endif | |
136 | ||
9c15f366 L |
137 | |
138 | .if BOOTWAIT | |
139 | ldi temp,10 | |
b741422e | 140 | rcall delay_ms |
9c15f366 L |
141 | |
142 | .endif | |
143 | ||
144 | rcall printstr | |
145 | .db 13,13,"CPM on an AVR, v" | |
146 | db_version VMAJOR, VMINOR | |
5c8bb361 | 147 | printstring " r" SVN_REVSTR " " TESTSTR |
9c15f366 L |
148 | |
149 | .if MEMTEST | |
150 | printnewline | |
151 | printstring "Testing RAM: fill..." | |
152 | ||
153 | ;Fill RAM | |
154 | ldiw x,0 | |
155 | ramtestw: | |
156 | mov temp,xh | |
157 | eor temp,xl | |
4675c141 | 158 | rcall dram_write_pp |
9c15f366 L |
159 | brcc ramtestw |
160 | printstring "wait..." | |
161 | ||
162 | ldi temp2,8 | |
163 | ramtestwl: | |
164 | ldi temp,255 | |
b741422e | 165 | rcall delay_ms |
9c15f366 L |
166 | dec temp2 |
167 | brne ramtestwl | |
168 | ||
169 | printstring "reread..." | |
170 | ||
171 | ;re-read RAM | |
172 | ldiw x,0 | |
fa9059af | 173 | clr temp3 ;Error counter |
9c15f366 | 174 | ramtestr: |
bca3519f | 175 | rcall dram_read |
fa9059af L |
176 | |
177 | ; ori temp,0x04 ;simulate error | |
178 | ; andi temp,0xF7 | |
179 | ||
9c15f366 L |
180 | mov temp2,xh |
181 | eor temp2,xl | |
182 | cp temp,temp2 | |
183 | breq ramtestrok | |
fa9059af L |
184 | tst temp3 |
185 | brne ramtestr1 | |
186 | printnewline | |
187 | printstring "Addr xx yy " | |
188 | ramtestr1: | |
189 | printnewline | |
825ecc9d | 190 | mov zl,temp |
fa9059af L |
191 | movw temp,x |
192 | rcall printhexw | |
193 | rcall printspace | |
9c15f366 L |
194 | mov temp,xh |
195 | eor temp,xl | |
fa9059af | 196 | mov temp2,temp |
9c15f366 | 197 | rcall printhex |
fa9059af | 198 | rcall printspace |
825ecc9d | 199 | mov temp,zl |
fa9059af L |
200 | rcall printhex |
201 | rcall printspace | |
202 | mov temp,temp2 | |
825ecc9d | 203 | eor temp,zl |
fa9059af L |
204 | and temp,temp2 |
205 | rcall printxbits | |
206 | rcall printspace | |
207 | mov temp,temp2 | |
825ecc9d | 208 | eor temp,zl |
fa9059af L |
209 | com temp2 |
210 | and temp,temp2 | |
211 | rcall printxbits | |
212 | ||
213 | inc temp3 | |
214 | cpi temp3,16 ; | |
215 | brsh ramtestrex | |
9c15f366 L |
216 | ramtestrok: |
217 | adiw xl,1 | |
218 | brcc ramtestr | |
fa9059af L |
219 | ramtestrex: |
220 | tst temp3 ;any errors? | |
221 | breq ramtestend | |
222 | ||
223 | printstring " System halted!" | |
224 | halted_loop: | |
225 | rjmp halted_loop ;keep AVR in an endless loop | |
226 | ||
227 | ramtestend: | |
9c15f366 L |
228 | |
229 | .endif | |
230 | ||
231 | .if MEMFILL | |
232 | ldiw x,0 | |
02d57479 | 233 | ldi temp,MEMFILL_VAL |
9c15f366 | 234 | ramfillw: |
4675c141 | 235 | rcall dram_write_pp |
9c15f366 L |
236 | brcc ramfillw |
237 | .endif | |
238 | ||
239 | ||
240 | ;---------------------------------------------------------------------------- | |
241 | ||
242 | boot_again: | |
243 | printnewline | |
dd7aea8c | 244 | printstring "Initing mmc..." |
64219415 | 245 | printnewline |
b741422e | 246 | lcall mgr_init_partitions |
9c15f366 L |
247 | |
248 | cbr temp,0x80 | |
249 | brne boot_ipl2 | |
250 | printstring "No bootable CP/M disk found! Please change MMC/SD-Card." | |
64219415 | 251 | printnewline |
9c15f366 L |
252 | ldi temp2,18 |
253 | boot_iplwl: | |
254 | ldi temp,255 | |
255 | rcall delay_ms | |
256 | dec temp2 | |
257 | brne boot_iplwl | |
258 | rjmp boot_again | |
259 | ||
260 | ||
261 | boot_ipl2: | |
b741422e | 262 | lcall mgr_prnt_parttbl |
9c15f366 L |
263 | printnewline |
264 | printstring "Partinit done." | |
dd7aea8c | 265 | |
2ccaac16 L |
266 | ; Init (de)blocking buffer |
267 | ||
268 | lcall dsk_inval_hostbuf | |
678fc0b0 | 269 | |
4675c141 | 270 | ; Read first sector of first CP/M partition (ipl) |
9c15f366 | 271 | |
92202636 L |
272 | ; Disk 0 |
273 | sts seekdsk,_0 | |
274 | ; Track 0 | |
275 | sts seektrk,_0 | |
276 | sts seektrk+1,_0 | |
277 | ; Sector 0 | |
278 | sts seeksec,_0 | |
279 | ||
dd7aea8c L |
280 | ; Destination |
281 | ldiw x,IPLADDR | |
282 | stsw dmaadr,x | |
283 | ||
2ccaac16 L |
284 | ldi temp,1<<READ_FUNC |
285 | lcall dskDoIt | |
9c15f366 | 286 | |
dd7aea8c | 287 | ; lift off |
b741422e | 288 | ljmp z80_init |
9c15f366 L |
289 | |
290 | ||
fa9059af L |
291 | printspace: |
292 | push temp | |
293 | ldi temp,' ' | |
294 | rcall uartputc | |
295 | pop temp | |
296 | ret | |
297 | ||
298 | printxbits: | |
299 | push temp2 | |
300 | push temp3 | |
301 | mov temp2,temp | |
302 | ldi temp3,8 | |
303 | prntxb0: | |
304 | ldi temp,'-' | |
305 | lsl temp2 | |
306 | brcc prntxb1 | |
307 | ldi temp,'X' | |
308 | prntxb1: | |
309 | rcall uartPutc | |
310 | dec temp3 | |
311 | brne prntxb0 | |
312 | pop temp3 | |
313 | pop temp2 | |
314 | ret | |
315 | ||
316 | ||
317 | ||
318 |