?? mmc.lst
字號:
1 .file "mmc.c"
2 .arch atmega32
3 __SREG__ = 0x3f
4 __SP_H__ = 0x3e
5 __SP_L__ = 0x3d
6 __tmp_reg__ = 0
7 __zero_reg__ = 1
8 .global __do_copy_data
9 .global __do_clear_bss
11 .text
12 .Ltext0:
77 .global mmcInit
79 mmcInit:
1:mmc.c **** //-------------------------------------------------------------------------
2:mmc.c **** #include <avr/io.h>
3:mmc.c ****
4:mmc.c **** #include "mmc.h"
5:mmc.c **** #include "spi.h"
6:mmc.c **** //-------------------------------------------------------------------------
7:mmc.c **** #define CS PB4
8:mmc.c **** #define CSH PORTB|=_BV(CS)
9:mmc.c **** #define CSL PORTB&=~_BV(CS)
10:mmc.c ****
11:mmc.c **** //-------------------------------------------------------------------------
12:mmc.c **** void mmcInit(void){
81 .LM1:
82 /* prologue: frame size=0 */
83 /* prologue end (size=0) */
13:mmc.c **** spiInit(); // initialize SPI interface
85 .LM2:
86 0000 0E94 0000 call spiInit
14:mmc.c **** DDRB|=_BV(PB4); // release chip select,low power selcet
88 .LM3:
89 0004 BC9A sbi 55-0x20,4
15:mmc.c **** CSH;
91 .LM4:
92 0006 C49A sbi 56-0x20,4
93 /* epilogue: frame size=0 */
94 0008 0895 ret
95 /* epilogue end (size=1) */
96 /* function mmcInit size 5 (4) */
98 .Lscope0:
102 .global mmcCommand
104 mmcCommand:
16:mmc.c **** }
17:mmc.c **** //-------------------------------------------------------------------------
18:mmc.c **** uint8_t mmcReset_1(void){
19:mmc.c **** uint8_t i,retry,r1;
20:mmc.c ****
21:mmc.c **** retry=0;
22:mmc.c **** do{
23:mmc.c **** for(i=0;i<10;i++) spiTransferByte(0xFF); //send dummy at CS high(dummy argument又叫啞元變量 )
24:mmc.c **** r1=mmcSendCommand(MMC_GO_IDLE_STATE, 0); // resetting card
25:mmc.c **** retry++;
26:mmc.c **** if(retry>10) return -1;
27:mmc.c **** } while(r1 != MMC_R1_IDLE_STATE);
28:mmc.c ****
29:mmc.c **** retry=0;
30:mmc.c **** do{
31:mmc.c **** r1=mmcSendCommand(MMC_SEND_OP_COND, 0); // initializing card
32:mmc.c **** retry++;
33:mmc.c **** if(retry>100) return -1;
34:mmc.c **** } while(r1!=0);
35:mmc.c ****
36:mmc.c **** mmcSendCommand(MMC_CRC_ON_OFF, 0); // turn off CRC checking
37:mmc.c **** mmcSendCommand(MMC_SET_BLOCKLEN, 512); // set block len 512 bytes
38:mmc.c ****
39:mmc.c **** return 0;
40:mmc.c **** }
41:mmc.c **** //-------------------------------------------------------------------------
42:mmc.c **** uint8_t mmcReset(void){
43:mmc.c **** uint8_t i;
44:mmc.c **** for(i=0;i<50;i++)if(mmcReset_1()==0)return 0;
45:mmc.c **** return -1;
46:mmc.c **** }
47:mmc.c **** //-------------------------------------------------------------------------
48:mmc.c **** uint8_t mmcSendCommand(uint8_t cmd, uint32_t arg){
49:mmc.c **** uint8_t r1;
50:mmc.c ****
51:mmc.c **** CSL; // assert chip select
52:mmc.c **** r1 = mmcCommand(cmd, arg); // issue the command
53:mmc.c **** CSH; // release chip select
54:mmc.c **** return r1;
55:mmc.c **** }
56:mmc.c **** //-------------------------------------------------------------------------
57:mmc.c **** uint8_t mmcRead(uint32_t sector, uint8_t* buffer ){
58:mmc.c **** uint8_t r1;
59:mmc.c **** uint16_t i;
60:mmc.c ****
61:mmc.c **** CSL; // assert chip select
62:mmc.c **** r1 = mmcCommand(MMC_READ_SINGLE_BLOCK, sector<<9); // issue command,argument is the data address,t
63:mmc.c **** if(r1 != 0)return r1;
64:mmc.c **** while(spiTransferByte(0xFF)!=MMC_STARTBLOCK_READ);// wait for block start
65:mmc.c ****
66:mmc.c **** for(i=0; i<0x200; i++){//0x200即讀了512個,2的9次
67:mmc.c **** *buffer++ = spiTransferByte(0xFF); // read in data
68:mmc.c **** }
69:mmc.c ****
70:mmc.c **** spiTransferByte(0xFF); // read 16-bit CRC
71:mmc.c **** spiTransferByte(0xFF); //ba crc du wan cai neng pai gan jing
72:mmc.c **** CSH; // release chip select,you fen zhu le
73:mmc.c **** return 0;
74:mmc.c **** }
75:mmc.c **** //-------------------------------------------------------------------------
76:mmc.c **** uint8_t mmcWrite(uint32_t sector, uint8_t* buffer){
77:mmc.c **** uint8_t r1;
78:mmc.c **** uint16_t i;
79:mmc.c ****
80:mmc.c **** CSL; // assert chip select
81:mmc.c **** r1 = mmcCommand(MMC_WRITE_BLOCK,sector<<9); // issue command ????????
82:mmc.c **** if(r1 != 0)return r1; //return r1 for further judgement in subfunctions
83:mmc.c **** spiTransferByte(0xFF); // send dummy
84:mmc.c **** spiTransferByte(MMC_STARTBLOCK_WRITE); // send data start token,indicate data will follow,arouse
85:mmc.c ****
86:mmc.c **** for(i=0; i<512; i++){
87:mmc.c **** spiTransferByte(*buffer++); // write data
88:mmc.c **** }
89:mmc.c ****
90:mmc.c **** spiTransferByte(0xFF); // write 16-bit CRC (dummy values)
91:mmc.c **** spiTransferByte(0xFF);
92:mmc.c ****
93:mmc.c **** r1 = spiTransferByte(0xFF); // read data response token
94:mmc.c **** if((r1&MMC_DR_MASK)!=MMC_DR_ACCEPT)return r1; //the mask get the lower five bits(Higher bits are a
95:mmc.c **** while(!spiTransferByte(0xFF)); // wait until card not busy(wait for the high level)
96:mmc.c **** CSH; // release chip select
97:mmc.c **** return 0;
98:mmc.c **** }
99:mmc.c **** //-------------------------------------------------------------------------
100:mmc.c **** uint8_t mmcCommand(uint8_t cmd, uint32_t arg){
106 .LM5:
107 /* prologue: frame size=0 */
108 000a EF92 push r14
109 000c FF92 push r15
110 000e 0F93 push r16
111 0010 1F93 push r17
112 0012 CF93 push r28
113 /* prologue end (size=5) */
114 0014 7A01 movw r14,r20
115 0016 8B01 movw r16,r22
101:mmc.c **** uint8_t r1,retry=0;
117 .LM6:
118 0018 C0E0 ldi r28,lo8(0)
102:mmc.c **** spiTransferByte(cmd|0x40); // send command
120 .LM7:
121 001a 8064 ori r24,lo8(64)
122 001c 0E94 0000 call spiTransferByte
103:mmc.c **** spiTransferByte(arg>>24);
124 .LM8:
125 0020 812F mov r24,r17
126 0022 9927 clr r25
127 0024 AA27 clr r26
128 0026 BB27 clr r27
129 0028 0E94 0000 call spiTransferByte
104:mmc.c **** spiTransferByte(arg>>16);
131 .LM9:
132 002c C801 movw r24,r16
133 002e AA27 clr r26
134 0030 BB27 clr r27
135 0032 0E94 0000 call spiTransferByte
105:mmc.c **** spiTransferByte(arg>>8);
137 .LM10:
138 0036 BB27 clr r27
139 0038 A12F mov r26,r17
140 003a 902F mov r25,r16
141 003c 8F2D mov r24,r15
142 003e 0E94 0000 call spiTransferByte
106:mmc.c **** spiTransferByte(arg);
144 .LM11:
145 0042 8E2D mov r24,r14
146 0044 0E94 0000 call spiTransferByte
107:mmc.c **** spiTransferByte(0x95); // crc valid only for MMC_GO_IDLE_STATE
148 .LM12:
149 0048 85E9 ldi r24,lo8(-107)
150 004a 0E94 0000 call spiTransferByte
108:mmc.c **** // end command
109:mmc.c **** // wait for response
110:mmc.c **** // if more than 8 retries, card has timed-out
111:mmc.c **** // return the received 0xFF
112:mmc.c **** while((r1=spiTransferByte(0xFF))==0xFF)if(retry++>8)break;
152 .LM13:
153 004e 04C0 rjmp .L3
154 .L6:
156 .LM14:
157 0050 8C2F mov r24,r28
158 0052 CF5F subi r28,lo8(-(1))
159 0054 8930 cpi r24,lo8(9)
160 0056 30F4 brsh .L4
161 .L3:
162 0058 8FEF ldi r24,lo8(-1)
163 005a 0E94 0000 call spiTransferByte
164 005e 982F mov r25,r24
165 0060 8F3F cpi r24,lo8(-1)
166 0062 B1F3 breq .L6
167 .L4:
113:mmc.c **** // return response
114:mmc.c **** return r1;
115:mmc.c **** }
169 .LM15:
170 0064 892F mov r24,r25
171 0066 9927 clr r25
172 /* epilogue: frame size=0 */
173 0068 CF91 pop r28
174 006a 1F91 pop r17
175 006c 0F91 pop r16
176 006e FF90 pop r15
177 0070 EF90 pop r14
178 0072 0895 ret
179 /* epilogue end (size=6) */
180 /* function mmcCommand size 53 (42) */
186 .Lscope1:
190 .global mmcSendCommand
192 mmcSendCommand:
194 .LM16:
195 /* prologue: frame size=0 */
196 /* prologue end (size=0) */
197 0074 9A01 movw r18,r20
198 0076 AB01 movw r20,r22
200 .LM17:
201 0078 C498 cbi 56-0x20,4
203 .LM18:
204 007a BA01 movw r22,r20
205 007c A901 movw r20,r18
206 007e 0E94 0000 call mmcCommand
208 .LM19:
209 0082 C49A sbi 56-0x20,4
211 .LM20:
212 0084 9927 clr r25
213 /* epilogue: frame size=0 */
214 0086 0895 ret
215 /* epilogue end (size=1) */
216 /* function mmcSendCommand size 10 (9) */
218 .Lscope2:
220 .global mmcReset_1
222 mmcReset_1:
224 .LM21:
225 /* prologue: frame size=0 */
226 0088 1F93 push r17
227 008a CF93 push r28
228 /* prologue end (size=2) */
230 .LM22:
231 008c 10E0 ldi r17,lo8(0)
232 .L9:
233 008e C9E0 ldi r28,lo8(9)
234 .L15:
236 .LM23:
237 0090 8FEF ldi r24,lo8(-1)
238 0092 0E94 0000 call spiTransferByte
239 0096 C150 subi r28,lo8(-(-1))
240 0098 C7FF sbrs r28,7
241 009a FACF rjmp .L15
243 .LM24:
244 009c 40E0 ldi r20,lo8(0)
245 009e 50E0 ldi r21,hi8(0)
246 00a0 60E0 ldi r22,hlo8(0)
247 00a2 70E0 ldi r23,hhi8(0)
248 00a4 80E0 ldi r24,lo8(0)
249 00a6 0E94 0000 call mmcSendCommand
251 .LM25:
252 00aa 1F5F subi r17,lo8(-(1))
254 .LM26:
255 00ac 1B30 cpi r17,lo8(11)
256 00ae 68F4 brsh .L23
258 .LM27:
259 00b0 8130 cpi r24,lo8(1)
260 00b2 69F7 brne .L9
261 00b4 10E0 ldi r17,lo8(0)
262 .L17:
264 .LM28:
265 00b6 40E0 ldi r20,lo8(0)
266 00b8 50E0 ldi r21,hi8(0)
267 00ba 60E0 ldi r22,hlo8(0)
268 00bc 70E0 ldi r23,hhi8(0)
269 00be 81E0 ldi r24,lo8(1)
270 00c0 0E94 0000 call mmcSendCommand
272 .LM29:
273 00c4 1F5F subi r17,lo8(-(1))
275 .LM30:
276 00c6 1536 cpi r17,lo8(101)
277 00c8 18F0 brlo .L19
278 .L23:
279 00ca 8FEF ldi r24,lo8(255)
280 00cc 90E0 ldi r25,hi8(255)
281 00ce 12C0 rjmp .L8
282 .L19:
284 .LM31:
285 00d0 8823 tst r24
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