Commit | Line | Data |
---|---|---|
9c66c9ff JM |
1 | #include <stdio.h> |
2 | #include <unistd.h> | |
3 | #include <stdlib.h> | |
4 | #include <string.h> | |
5 | #include <errno.h> | |
6 | #include <stdint.h> | |
7 | ||
8 | #include "log.h" | |
9 | #include "serial.h" | |
10 | #include "protocol.h" | |
11 | ||
12 | static uint8_t checksum(uint8_t * buff, int len) | |
13 | { | |
14 | int sum = 0; | |
15 | int i; | |
16 | ||
17 | for (i=0;i<len;i++) sum += buff[i]; | |
18 | return sum & 0xFF; | |
19 | } | |
20 | ||
21 | void print_memory(uint16_t addr, const unsigned char * buff, int words) | |
22 | { | |
23 | int len = (words * 5) + 16; | |
24 | char * line = malloc(len); | |
25 | char * out = line; | |
26 | out += snprintf(out, len-strlen(line), "Mem %04X: ", addr); | |
27 | ||
28 | const unsigned char *p = &buff[0]; | |
29 | for (int i=0; i<words; i++) { | |
30 | out += snprintf(out, len-strlen(line), "%02X%02X ", p[0], p[1] ); | |
31 | p+=2; | |
32 | } | |
33 | logd(line); | |
34 | free(line); | |
35 | } | |
36 | ||
37 | void dumpbuff(const unsigned char * buff, int charlen) | |
38 | { | |
39 | int len = (charlen * 3) + 16; | |
40 | char * line = malloc(len); | |
41 | char * out = line; | |
42 | out += snprintf(out, len-strlen(line), "Dump: "); | |
43 | ||
44 | const unsigned char *p = &buff[0]; | |
45 | for (int i=0; i<charlen; i++) { | |
46 | out += snprintf(out, len-strlen(line), "%02X ", p[0] ); | |
47 | p++; | |
48 | } | |
49 | logd(line); | |
50 | free(line); | |
51 | } | |
52 | ||
53 | int loader_readmem(port_t * pt, uint16_t addr, uint8_t * memory, int words) | |
54 | { | |
55 | int len = (words * 2) + 4; | |
56 | unsigned char * buff = malloc(len); | |
57 | ||
58 | /* request to read memory block */ | |
59 | buff[0] = 'R'; | |
60 | buff[1] = addr >> 8; | |
61 | buff[2] = addr & 0xFF; | |
62 | buff[3] = checksum(buff, 3); | |
63 | ||
64 | int ret = serial_write(pt, buff, 4); | |
65 | if (ret <= 0) return 1; | |
66 | ||
67 | bzero(buff, len); | |
68 | ||
69 | /* read the response */ | |
70 | if (serial_read(pt, buff, 1)<=0) return 1; | |
71 | ||
72 | if (buff[0] == 'E') { | |
73 | loge("ReadMem %04X: Loader gave error", addr); | |
74 | return 2; | |
75 | } | |
76 | ||
77 | if (buff[0] != 'R') { | |
78 | loge("ReadMem %04X: Unknown response to read 0x%02X '%c'", addr, buff[0], buff[0]); | |
79 | return 3; | |
80 | } | |
81 | ||
82 | /* now read the address, and check it matches */ | |
83 | ret = serial_read(pt, &buff[1], len-1); | |
84 | if (ret < 1) { | |
85 | loge("ReadMem %04X: Error read response", addr); | |
86 | return 4; | |
87 | } | |
88 | if (ret < len-1) { | |
89 | loge("ReadMem %04X: Short read %d of %d", addr, ret, len-1); | |
90 | return 5; | |
91 | } | |
92 | ||
93 | int sum = checksum(buff, len-1); | |
94 | if ((sum & 0xFF) != buff[len-1]) { | |
95 | loge("ReadMem %04X: Bad checksum. %02X != %02X", addr, sum & 0xFF, buff[len-1]); | |
96 | return 6; | |
97 | } | |
98 | ||
99 | uint16_t realaddr = (buff[1]<<8) | buff[2]; | |
100 | if (realaddr != addr) { | |
101 | loge("ReadMem %04X: Actual Address %04X", addr, realaddr); | |
102 | return 7; | |
103 | } | |
104 | logd("ReadMem %04X: Read Successful", realaddr); | |
105 | ||
106 | memcpy(memory, &buff[3], (words * 2)); | |
107 | free(buff); | |
108 | ||
109 | return 0; | |
110 | } | |
111 | ||
112 | ||
113 | int loader_writemem(port_t * pt, uint16_t addr, uint8_t * memory, int words) | |
114 | { | |
115 | int len = (words * 2) + 4; | |
116 | uint8_t * buff = malloc((words * 2) + 4); | |
117 | ||
118 | /* request to read memory block */ | |
119 | buff[0] = 'W'; | |
120 | buff[1] = addr >> 8; | |
121 | buff[2] = addr & 0xFF; | |
122 | ||
123 | unsigned char * p = memory; | |
124 | unsigned char * q = &buff[3]; | |
125 | for (int i=0; i<words; i++) { | |
126 | *q++ = *p++; | |
127 | *q++ = *p++; | |
128 | } | |
129 | *q = checksum(buff, len-1) & 0xFF; | |
130 | ||
131 | logd("WriteMem %04X: Sending Write request", addr); | |
132 | int ret = serial_write(pt, buff, len); | |
133 | if (ret <= 0) { free(buff); return 1; } | |
134 | ||
135 | logd("WriteMem %04X: Awaiting Write confirmation", addr); | |
136 | /* read the response */ | |
137 | if (serial_read(pt, buff, 1)<=0) { free(buff); return 1; } | |
138 | ||
139 | if (buff[0] == 'E') { | |
140 | loge("WriteMem %04X: Bootloader gave an error", addr); | |
141 | free(buff); | |
142 | return 2; | |
143 | } | |
144 | ||
145 | if (buff[0] != 'W') { | |
146 | loge("WriteMem %04X: unknown reponse '%c'", addr, buff[0]); | |
147 | free(buff); | |
148 | return 3; | |
149 | } | |
150 | ||
151 | /* now read the address, and check it matches */ | |
152 | ret = serial_read(pt, &buff[1], 3); | |
153 | if (ret < 3) { | |
154 | loge("WriteMem %04X: Error reading rest of response %d of %d", addr, ret, 3); | |
155 | free(buff); | |
156 | return 4; | |
157 | } | |
158 | ||
159 | uint16_t realaddr = (buff[1]<<8) | buff[2]; | |
160 | if (realaddr != addr) { | |
161 | loge("WriteMem %04X: Actual location %04X", addr, realaddr); | |
162 | free(buff); | |
163 | return 5; | |
164 | } | |
165 | int sum = checksum(buff, 3); | |
166 | ||
167 | if ((sum & 0xFF) != buff[3]) { | |
168 | loge("WriteMem %04X: Bad checksum on confirmation. %02X != %02X", addr, sum & 0xFF, buff[3]); | |
169 | dumpbuff(buff, 4); | |
170 | free(buff); | |
171 | return 8; | |
172 | } | |
173 | ||
174 | logd("WriteMem %04X: Write confirmed.", realaddr); | |
175 | free(buff); | |
176 | ||
177 | return 0; | |
178 | } | |
179 | ||
180 | /* | |
181 | * Connect to the bootloader | |
182 | * read the start of bootloader address | |
183 | */ | |
184 | int loader_connect(port_t * pt, uint16_t *maxmem, uint16_t *devid) | |
185 | { | |
186 | if (pt == NULL) return 1; | |
187 | ||
188 | logd("Connect: Assert break and wait for acknowledgement"); | |
189 | serial_break(pt, 1); | |
190 | ||
191 | unsigned char buff[10]; | |
192 | int bootload = 0; | |
193 | int ret; | |
194 | ||
195 | logi("Please reset the device to enter bootloader mode"); | |
196 | ||
197 | while ((ret=serial_read(pt, buff, 1))> 0) { | |
198 | if (buff[0] == 06) { | |
199 | break; | |
200 | } else { | |
201 | logd("Connect: Want ESC (0x06) got 0x%02X ret=%d", buff[0], ret); | |
202 | usleep(100000); | |
203 | } | |
204 | } | |
205 | ||
206 | if (ret <= 0) { | |
207 | if (ret == 0) | |
208 | loge("Connect: Serial port closed"); | |
209 | else | |
210 | loge("Connect: read error: %s", strerror(errno)); | |
211 | return 1; | |
212 | } | |
213 | ||
214 | /* Next we should see 'B' 'L' */ | |
215 | while ((ret=serial_read(pt, &buff[1], 2))> 0) { | |
216 | if (buff[1] == 'B' && buff[2] == 'L') { | |
217 | bootload = 1; | |
218 | break; | |
219 | } else { | |
220 | logd("Connect: Want 'BL' got '%c%c' ret=%d", buff[1], buff[2], ret); | |
221 | } | |
222 | bzero(buff,3); | |
223 | } | |
224 | ||
225 | if (ret <= 0) { | |
226 | if (ret == 0) | |
227 | loge("Connect: Serial port closed"); | |
228 | else | |
229 | loge("Connect: read error: %s", strerror(errno)); | |
230 | return 1; | |
231 | } | |
232 | ||
233 | /* turn break off now we are in bootloader mode */ | |
234 | serial_break(pt, 0); | |
235 | ||
236 | if (!bootload) { | |
237 | serial_close(pt); | |
238 | loge("Connect: Could not find bootloader"); | |
239 | return 1; | |
240 | } | |
241 | ||
242 | logd("Connect: Release break. Read memory size."); | |
243 | ||
244 | /* now read the bootloaders location, and thus mem size */ | |
245 | ret=serial_read(pt, &buff[3], 5); | |
246 | ||
247 | if (ret < 3) { | |
248 | if (ret == 0) | |
249 | loge("Connect: Serial port closed"); | |
250 | else | |
251 | loge("Connect: read error: %s", strerror(errno)); | |
252 | return 1; | |
253 | } | |
254 | ||
255 | if (buff[7] != (checksum(buff,7) & 0xFF)) { | |
256 | loge("Connect: Bad checksum"); | |
257 | return 1; | |
258 | } | |
259 | ||
260 | *devid = (buff[3] << 8) | buff[4]; | |
261 | logd("Connect: Device ID: 0x%04X", *devid); | |
262 | ||
263 | *maxmem = (buff[5] << 8) | buff[6]; | |
264 | logd("Connect: Memory Size: 0x%04X", *maxmem); | |
265 | ||
266 | return 0; | |
267 | } |