1 /*-------------------------------------------------------------------------
3 device.c - Accomodates subtle variations in PIC devices
4 Written By - Scott Dattalo scott@dattalo.com
6 This program is free software; you can redistribute it and/or modify it
7 under the terms of the GNU General Public License as published by the
8 Free Software Foundation; either version 2, or (at your option) any
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
19 -------------------------------------------------------------------------*/
25 #include "common.h" // Include everything in the SDCC src directory
34 #if defined(__BORLANDC__) || defined(_MSC_VER)
35 #define STRCASECMP stricmp
36 #define STRNCASECMP strnicmp
38 #define STRCASECMP strcasecmp
39 #define STRNCASECMP strncasecmp
42 extern int Gstack_base_addr;
43 extern int Gstack_size;
45 #define MAX_PICLIST 200
46 static PIC_device *Pics[MAX_PICLIST];
47 static int num_of_supported_PICS = 0;
49 static PIC_device *pic=NULL;
51 int maxRAMaddress = 0;
52 AssignedMemory *finalMapping=NULL;
54 #define CONFIG_WORD_ADDRESS 0x2007
55 #define CONFIG2_WORD_ADDRESS 0x2008
56 #define DEFAULT_CONFIG_WORD 0x3fff
57 #define DEFAULT_CONFIG2_WORD 0x3ffc
59 #define DEVICE_FILE_NAME "pic14devices.txt"
60 #define PIC14_STRING_LEN 256
61 #define SPLIT_WORDS_MAX 16
63 static unsigned int config_word = DEFAULT_CONFIG_WORD;
64 static unsigned int config2_word = DEFAULT_CONFIG2_WORD;
66 extern int pic14_is_shared (regs *reg);
67 extern void emitSymbolToFile (FILE *of, const char *name, const char *section_type, int size, int addr, int useEQU, int globalize);
70 /* parse a value from the configuration file */
71 static int parse_config_value(char *str)
73 if (str[strlen(str) - 1] == 'K')
74 return atoi(str) * 1024; /* like "1K" */
76 else if (STRNCASECMP(str, "0x", 2) == 0)
77 return strtol(str+2, NULL, 16); /* like "0x400" */
80 return atoi(str); /* like "1024" */
84 /* split a line into words */
85 static int split_words(char result_word[SPLIT_WORDS_MAX][PIC14_STRING_LEN], char *str)
91 while (*pos != '\0' && num_words < SPLIT_WORDS_MAX) {
92 /* remove leading spaces */
93 while (isspace(*pos) || *pos == ',')
96 /* copy everything up until the first space or comma */
97 for (ccount = 0; *pos != '\0' && !isspace(*pos) && *pos != ',' && ccount < PIC14_STRING_LEN-1; ccount++, pos++)
98 result_word[num_words][ccount] = *pos;
99 result_word[num_words][ccount] = '\0';
108 /* remove annoying prefixes from the processor name */
109 static char *sanitise_processor_name(char *name)
111 char *proc_pos = name;
116 if (STRNCASECMP(proc_pos, "pic16", 5) == 0)
119 else if (STRNCASECMP(proc_pos, "p16", 3) == 0)
122 else if (STRNCASECMP(proc_pos, "16", 2) == 0)
129 /* create a structure for a pic processor */
130 static PIC_device *create_pic(char *pic_name, int maxram, int bankmsk, int confsiz, int program, int data, int eeprom, int io)
133 char *simple_pic_name = sanitise_processor_name(pic_name);
135 new_pic = Safe_calloc(1, sizeof(PIC_device));
136 new_pic->name[0] = Safe_calloc(strlen(simple_pic_name)+3, sizeof(char));
137 sprintf(new_pic->name[0], "16%s", simple_pic_name);
138 new_pic->name[1] = Safe_calloc(strlen(simple_pic_name)+4, sizeof(char));
139 sprintf(new_pic->name[1], "p16%s", simple_pic_name);
140 new_pic->name[2] = Safe_calloc(strlen(simple_pic_name)+6, sizeof(char));
141 sprintf(new_pic->name[2], "pic16%s", simple_pic_name);
142 new_pic->name[3] = Safe_calloc(strlen(simple_pic_name)+1, sizeof(char));
143 strcpy(new_pic->name[3], simple_pic_name);
145 new_pic->defMaxRAMaddrs = maxram;
146 new_pic->bankMask = bankmsk;
147 new_pic->hasSecondConfigReg = confsiz > 1;
149 new_pic->programMemSize = program;
150 new_pic->dataMemSize = data;
151 new_pic->eepromMemSize = eeprom;
152 new_pic->ioPins = io;
154 Pics[num_of_supported_PICS] = new_pic;
155 num_of_supported_PICS++;
161 /* mark some registers as being duplicated across banks */
162 static void register_map(int num_words, char word[SPLIT_WORDS_MAX][PIC14_STRING_LEN])
168 fprintf(stderr, "WARNING: not enough values in %s regmap directive\n", DEVICE_FILE_NAME);
172 r.alias = parse_config_value(word[1]);
174 for (pcount = 2; pcount < num_words; pcount++) {
176 r.start_address = parse_config_value(word[pcount]);
177 r.end_address = parse_config_value(word[pcount]);
178 r.bank = (r.start_address >> 7) & 3;
185 /* define ram areas - may be duplicated across banks */
186 static void ram_map(int num_words, char word[SPLIT_WORDS_MAX][PIC14_STRING_LEN])
191 fprintf(stderr, "WARNING: not enough values in %s memmap directive\n", DEVICE_FILE_NAME);
195 r.start_address = parse_config_value(word[1]);
196 r.end_address = parse_config_value(word[2]);
197 r.alias = parse_config_value(word[3]);
198 r.bank = (r.start_address >> 7) & 3;
203 extern set *includeDirsSet;
204 extern set *userIncDirsSet;
205 extern set *libDirsSet;
206 extern set *libPathsSet;
208 /* read the file with all the pic14 definitions and pick out the definition for a processor
209 * if specified. if pic_name is NULL reads everything */
210 static PIC_device *find_device(char *pic_name)
213 char pic_buf[PIC14_STRING_LEN];
215 int found_processor = FALSE;
217 char processor_name[SPLIT_WORDS_MAX][PIC14_STRING_LEN];
218 int num_processor_names = 0;
226 char *simple_pic_name;
231 simple_pic_name = sanitise_processor_name(pic_name);
233 num_of_supported_PICS = 0;
235 /* open the piclist file */
236 /* first scan all include directories */
238 //fprintf( stderr, "%s: searching %s\n", __FUNCTION__, DEVICE_FILE_NAME );
239 for (dir = setFirstItem(includeDirsSet);
241 dir = setNextItem(includeDirsSet))
243 //fprintf( stderr, "searching1 %s\n", dir );
244 SNPRINTF(&filename[0], len, "%s%s%s", dir, DIR_SEPARATOR_STRING, DEVICE_FILE_NAME);
245 pic_file = fopen( filename, "rt" );
248 for (dir = setFirstItem(userIncDirsSet);
250 dir = setNextItem(userIncDirsSet))
252 //fprintf( stderr, "searching2 %s\n", dir );
253 SNPRINTF(&filename[0], len, "%s%s%s", dir, DIR_SEPARATOR_STRING, DEVICE_FILE_NAME);
254 pic_file = fopen( filename, "rt" );
257 for (dir = setFirstItem(libDirsSet);
259 dir = setNextItem(libDirsSet))
261 //fprintf( stderr, "searching3 %s\n", dir );
262 SNPRINTF(&filename[0], len, "%s%s%s", dir, DIR_SEPARATOR_STRING, DEVICE_FILE_NAME);
263 pic_file = fopen( filename, "rt" );
266 for (dir = setFirstItem(libPathsSet);
268 dir = setNextItem(libPathsSet))
270 //fprintf( stderr, "searching4 %s\n", dir );
271 SNPRINTF(&filename[0], len, "%s%s%s", dir, DIR_SEPARATOR_STRING, DEVICE_FILE_NAME);
272 pic_file = fopen( filename, "rt" );
276 pic_file = fopen(DATADIR LIB_DIR_SUFFIX DIR_SEPARATOR_STRING "pic" DIR_SEPARATOR_STRING DEVICE_FILE_NAME, "rt");
278 if (pic_file == NULL) {
279 /* this second attempt is used when initially building the libraries */
280 pic_file = fopen(".." DIR_SEPARATOR_STRING ".." DIR_SEPARATOR_STRING ".." DIR_SEPARATOR_STRING ".."
281 DIR_SEPARATOR_STRING "src" DIR_SEPARATOR_STRING "pic" DIR_SEPARATOR_STRING
282 DEVICE_FILE_NAME, "rt");
283 if (pic_file == NULL) {
284 fprintf(stderr, "can't find %s\n", DATADIR LIB_DIR_SUFFIX DIR_SEPARATOR_STRING "pic"
285 DIR_SEPARATOR_STRING DEVICE_FILE_NAME);
290 /* read line by line */
291 pic_buf[sizeof(pic_buf)-1] = '\0';
292 while (fgets(pic_buf, sizeof(pic_buf)-1, pic_file) != NULL && !done) {
294 /* remove trailing spaces */
295 while (isspace(pic_buf[strlen(pic_buf)-1]))
296 pic_buf[strlen(pic_buf)-1] = '\0';
298 /* remove leading spaces */
299 for (pic_buf_pos = pic_buf; isspace(*pic_buf_pos); pic_buf_pos++)
302 /* ignore comment / empty lines */
303 if (*pic_buf_pos != '\0' && *pic_buf_pos != '#') {
305 /* split into fields */
306 char pic_word[SPLIT_WORDS_MAX][PIC14_STRING_LEN];
310 num_pic_words = split_words(pic_word, pic_buf_pos);
312 if (STRCASECMP(pic_word[0], "processor") == 0) {
314 if (pic_name == NULL) {
315 /* this is the mode where we read all the processors in - store the names for now */
316 if (num_processor_names > 0) {
317 /* store away all the previous processor definitions */
320 for (dcount = 1; dcount < num_processor_names; dcount++)
321 create_pic(processor_name[dcount], pic_maxram, pic_bankmsk,
322 pic_confsiz, pic_program, pic_data, pic_eeprom, pic_io);
325 num_processor_names = split_words(processor_name, pic_buf_pos);
328 /* if we've just completed reading a processor definition stop now */
332 /* check if this processor name is a match */
333 for (wcount = 1; wcount < num_pic_words; wcount++) {
335 /* skip uninteresting prefixes */
336 char *found_name = sanitise_processor_name(pic_word[wcount]);
338 if (STRCASECMP(found_name, simple_pic_name) == 0)
339 found_processor = TRUE;
346 if (found_processor || pic_name == NULL) {
347 /* only parse a processor section if we've found the one we want */
348 if (STRCASECMP(pic_word[0], "maxram") == 0 && num_pic_words > 1) {
349 pic_maxram = parse_config_value(pic_word[1]);
350 setMaxRAM(pic_maxram);
352 else if (STRCASECMP(pic_word[0], "bankmsk") == 0 && num_pic_words > 1)
353 pic_bankmsk = parse_config_value(pic_word[1]);
355 else if (STRCASECMP(pic_word[0], "confsiz") == 0 && num_pic_words > 1)
356 pic_confsiz = parse_config_value(pic_word[1]);
358 else if (STRCASECMP(pic_word[0], "program") == 0 && num_pic_words > 1)
359 pic_program = parse_config_value(pic_word[1]);
361 else if (STRCASECMP(pic_word[0], "data") == 0 && num_pic_words > 1)
362 pic_data = parse_config_value(pic_word[1]);
364 else if (STRCASECMP(pic_word[0], "eeprom") == 0 && num_pic_words > 1)
365 pic_eeprom = parse_config_value(pic_word[1]);
367 else if (STRCASECMP(pic_word[0], "io") == 0 && num_pic_words > 1)
368 pic_io = parse_config_value(pic_word[1]);
370 else if (STRCASECMP(pic_word[0], "regmap") == 0 && num_pic_words > 2) {
372 register_map(num_pic_words, pic_word);
374 else if (STRCASECMP(pic_word[0], "memmap") == 0 && num_pic_words > 2) {
376 ram_map(num_pic_words, pic_word);
379 fprintf(stderr, "WARNING: %s: bad syntax `%s'\n", DEVICE_FILE_NAME, pic_word[0]);
388 /* if we're in read-the-lot mode then create the final processor definition */
389 if (pic_name == NULL) {
391 if (num_processor_names > 0) {
392 /* store away all the previous processor definitions */
395 for (dcount = 1; dcount < num_processor_names; dcount++)
396 create_pic(processor_name[dcount], pic_maxram, pic_bankmsk,
397 pic_confsiz, pic_program, pic_data, pic_eeprom, pic_io);
402 if (found_processor) {
403 /* create a new pic entry */
404 return create_pic(pic_name, pic_maxram, pic_bankmsk,
405 pic_confsiz, pic_program, pic_data, pic_eeprom, pic_io);
412 void addMemRange(memRange *r, int type)
415 int alias = r->alias;
417 if (maxRAMaddress < 0) {
418 fprintf(stderr, "missing maxram setting in %s\n", DEVICE_FILE_NAME);
423 for (i=r->start_address; i<= r->end_address; i++) {
424 if ((i|alias) <= maxRAMaddress) {
425 /* if we haven't seen this address before, enter it */
426 if (!finalMapping[i | alias].isValid) {
427 finalMapping[i | alias].isValid = 1;
428 finalMapping[i | alias].alias = r->alias;
429 finalMapping[i | alias].bank = r->bank;
432 finalMapping[i | alias].isSFR = 1;
434 finalMapping[i | alias].isSFR = 0;
438 fprintf(stderr, "WARNING: %s:%s memory at 0x%x is beyond max ram = 0x%x\n",
439 __FILE__,__FUNCTION__,(i|alias), maxRAMaddress);
443 /* Decrement alias */
445 alias -= ((alias & (alias - 1)) ^ alias);
450 } while (alias >= 0);
453 void setMaxRAM(int size)
456 maxRAMaddress = size;
458 if (maxRAMaddress < 0) {
459 fprintf(stderr, "invalid maxram 0x%x setting in %s\n",
460 maxRAMaddress, DEVICE_FILE_NAME);
464 finalMapping = Safe_calloc(1+maxRAMaddress,
465 sizeof(AssignedMemory));
467 /* Now initialize the finalMapping array */
469 for(i=0; i<=maxRAMaddress; i++) {
470 finalMapping[i].reg = NULL;
471 finalMapping[i].isValid = 0;
472 finalMapping[i].bank = (i>>7);
476 /*-----------------------------------------------------------------*
477 *-----------------------------------------------------------------*/
479 int isREGinBank(regs *reg, int bank)
485 if((int)((reg->address | reg->alias) & pic->bankMask & bank) == bank)
491 /*-----------------------------------------------------------------*
492 *-----------------------------------------------------------------*/
493 int REGallBanks(regs *reg)
499 return ((reg->address | reg->alias) & pic->bankMask);
503 /*-----------------------------------------------------------------*
504 *-----------------------------------------------------------------*/
506 int isSFR(int address)
509 if( (address > maxRAMaddress) || !finalMapping[address].isSFR)
517 * dump_map -- debug stuff
524 for(i=0; i<=maxRAMaddress; i++) {
525 //fprintf(stdout , "addr 0x%02x is %s\n", i, ((finalMapping[i].isValid) ? "valid":"invalid"));
527 if(finalMapping[i].isValid) {
528 fprintf(stderr,"addr: 0x%02x",i);
529 if(finalMapping[i].isSFR)
530 fprintf(stderr," isSFR");
531 if(finalMapping[i].reg)
532 fprintf( stderr, " reg %s", finalMapping[i].reg->name);
533 fprintf(stderr, "\n");
539 void dump_sfr(FILE *of)
544 static int udata_flag=0;
548 //dump_map(); /* display the register map */
549 //fprintf(stdout,";dump_sfr \n");
550 if (maxRAMaddress < 0) {
551 fprintf(stderr, "missing maxram setting in %s\n", DEVICE_FILE_NAME);
555 for (addr = 0; addr <= maxRAMaddress; addr++)
557 regs *reg = finalMapping[addr].reg;
559 if (reg && !reg->isEmitted)
561 if (pic14_options.isLibrarySource && pic14_is_shared (reg))
563 /* rely on external declarations for the non-fixed stack */
564 /* Update: We always emit the STACK symbols into a
565 * udata_shr section, so no extern declaration is
567 //fprintf (of, "\textern\t%s\n", reg->name);
569 emitSymbolToFile (of, reg->name, "udata", reg->size, reg->isFixed ? reg->address : -1, 0, pic14_is_shared (reg));
579 if(finalMapping[addr].reg && !finalMapping[addr].reg->isEmitted) {
586 /* clear the lower 7-bits of the start address of the first
587 * variable declared in this bank. The upper bits for the mid
588 * range pics are the bank select bits.
591 bank_base = start & 0xfff8;
593 /* The bank number printed in the cblock comment tacitly
594 * assumes that the first register in the contiguous group
595 * of registers represents the bank for the whole group */
597 if ( (start != addr) && (!udata_flag) ) {
599 //fprintf(of,"\tudata\n");
602 for( ; start < addr; start++) {
603 if((finalMapping[start].reg) &&
604 (!finalMapping[start].reg->isEmitted) &&
605 (!finalMapping[start].instance) &&
606 (!finalMapping[start].isSFR)) {
608 if (finalMapping[start].reg->isFixed) {
610 for (i=0; i<finalMapping[start].reg->size; i++) {
611 fprintf(of,"%s\tEQU\t0x%04x\n",
612 finalMapping[start].reg->name,
613 finalMapping[start].reg->address+i);
616 emitSymbolToFile (of, finalMapping[start].reg->name, finalMapping[start].reg->size);
618 fprintf(of,"%s\tres\t%i\n",
619 finalMapping[start].reg->name,
620 finalMapping[start].reg->size);
623 finalMapping[start].reg->isEmitted = 1;
634 } while(addr <= maxRAMaddress);
640 /*-----------------------------------------------------------------*
641 * void list_valid_pics(int ncols, int list_alias)
643 * Print out a formatted list of valid PIC devices
645 * ncols - number of columns in the list.
647 * list_alias - if non-zero, print all of the supported aliases
648 * for a device (e.g. F84, 16F84, etc...)
649 *-----------------------------------------------------------------*/
650 void list_valid_pics(int ncols, int list_alias)
656 if (num_of_supported_PICS == 0)
657 find_device(NULL); /* load all the definitions */
660 max_alias = PROCESSOR_NAMES;
662 /* decrement the column number if it's greater than zero */
663 ncols = (ncols > 1) ? ncols-1 : 4;
665 /* Find the device with the longest name */
666 for(i=0,longest=0; i<num_of_supported_PICS; i++) {
667 for(j=0; j<max_alias; j++) {
668 k = strlen(Pics[i]->name[j]);
676 fprintf(stderr, "\nPIC14 processors and their characteristics:\n\n");
677 fprintf(stderr, " processor");
678 for(k=0; k<longest-1; k++)
680 fprintf(stderr, "program RAM EEPROM I/O\n");
681 fprintf(stderr, "-----------------------------------------------------\n");
683 for(i=0; i < num_of_supported_PICS; i++) {
684 fprintf(stderr," %s", Pics[i]->name[0]);
685 l = longest + 2 - strlen(Pics[i]->name[0]);
689 fprintf(stderr, " ");
690 if (Pics[i]->programMemSize % 1024 == 0)
691 fprintf(stderr, "%4dK", Pics[i]->programMemSize / 1024);
693 fprintf(stderr, "%5d", Pics[i]->programMemSize);
695 fprintf(stderr, " %5d %5d %4d\n",
696 Pics[i]->dataMemSize, Pics[i]->eepromMemSize, Pics[i]->ioPins);
701 fprintf(stderr, "\nPIC14 processors supported:\n");
702 for(i=0; i < num_of_supported_PICS; i++) {
704 for (j = 0; j<max_alias; j++) {
706 fprintf(stderr,"%s", Pics[i]->name[j]);
708 l = longest + 2 - strlen(Pics[i]->name[j]);
727 /*-----------------------------------------------------------------*
729 *-----------------------------------------------------------------*/
730 void init_pic(char *pic_type)
732 pic = find_device(pic_type);
736 fprintf(stderr, "'%s' was not found.\n", pic_type);
738 fprintf(stderr, "No processor has been specified (use -pPROCESSOR_NAME)\n");
740 list_valid_pics(7,0);
745 /*-----------------------------------------------------------------*
747 *-----------------------------------------------------------------*/
748 int picIsInitialized(void)
750 if(pic && maxRAMaddress > 0)
757 /*-----------------------------------------------------------------*
758 * char *processor_base_name(void) - Include file is derived from this.
759 *-----------------------------------------------------------------*/
760 char *processor_base_name(void)
769 /*-----------------------------------------------------------------*
770 *-----------------------------------------------------------------*/
771 int validAddress(int address, int reg_size)
775 if (maxRAMaddress < 0) {
776 fprintf(stderr, "missing maxram setting in %s\n", DEVICE_FILE_NAME);
779 // fprintf(stderr, "validAddress: Checking 0x%04x\n",address);
780 assert (reg_size > 0);
781 if(address + (reg_size - 1) > maxRAMaddress)
784 for (i=0; i<reg_size; i++)
785 if(!finalMapping[address + i].isValid ||
786 finalMapping[address+i].reg ||
787 finalMapping[address+i].isSFR )
793 /*-----------------------------------------------------------------*
794 *-----------------------------------------------------------------*/
795 void mapRegister(regs *reg)
801 if(!reg || !reg->size) {
802 fprintf(stderr,"WARNING: %s:%s:%d Bad register\n",__FILE__,__FUNCTION__,__LINE__);
806 if (maxRAMaddress < 0) {
807 fprintf(stderr, "missing maxram setting in %s\n", DEVICE_FILE_NAME);
811 for(i=0; i<reg->size; i++) {
813 alias = finalMapping[reg->address].alias;
818 //fprintf(stdout,"mapping %s to address 0x%02x, reg size = %d\n",reg->name, (reg->address+alias+i),reg->size);
820 finalMapping[reg->address + alias + i].reg = reg;
821 finalMapping[reg->address + alias + i].instance = i;
823 /* Decrement alias */
825 alias -= ((alias & (alias - 1)) ^ alias);
832 //fprintf(stderr,"%s - %s addr = 0x%03x, size %d\n",__FUNCTION__,reg->name, reg->address,reg->size);
838 /*-----------------------------------------------------------------*
839 *-----------------------------------------------------------------*/
840 int assignRegister(regs *reg, int start_address)
844 //fprintf(stderr,"%s - %s start_address = 0x%03x\n",__FUNCTION__,reg->name, start_address);
847 if (validAddress(reg->address,reg->size)) {
848 //fprintf(stderr,"%s - %s address = 0x%03x\n",__FUNCTION__,reg->name, reg->address);
853 if( isSFR(reg->address)) {
858 fprintf(stderr, "WARNING: Ignoring Out of Range register assignment at fixed address %d, %s\n",
859 reg->address, reg->name);
863 /* This register does not have a fixed address requirement
864 * so we'll search through all availble ram address and
865 * assign the first one */
867 for (i=start_address; i<=maxRAMaddress; i++) {
869 if (validAddress(i,reg->size)) {
876 fprintf(stderr, "WARNING: No more RAM available for %s\n",reg->name);
883 /*-----------------------------------------------------------------*
884 *-----------------------------------------------------------------*/
885 void assignFixedRegisters(set *regset)
889 for (reg = setFirstItem(regset) ; reg ;
890 reg = setNextItem(regset)) {
893 assignRegister(reg,0);
898 /*-----------------------------------------------------------------*
899 *-----------------------------------------------------------------*/
900 void assignRelocatableRegisters(set *regset, int used)
906 for (reg = setFirstItem(regset) ; reg ;
907 reg = setNextItem(regset)) {
909 //fprintf(stdout,"assigning %s (%d) isFixed=%d, wasUsed=%d\n",reg->name,reg->size,reg->isFixed,reg->wasUsed);
911 if((!reg->isExtern) && (!reg->isFixed) && ( used || reg->wasUsed)) {
912 /* If register have been reused then shall not print it a second time. */
915 for (s = regset; s; s = s->next) {
920 if((!r->isFixed) && ( used || r->wasUsed)) {
921 if (r->rIdx == reg->rIdx) {
922 reg->address = r->address;
929 address = assignRegister(reg,address);
936 /*-----------------------------------------------------------------*
937 * void assignConfigWordValue(int address, int value)
939 * Most midrange PICs have one config word at address 0x2007.
940 * Newer PIC14s have a second config word at address 0x2008.
941 * This routine will assign values to those addresses.
943 *-----------------------------------------------------------------*/
945 void assignConfigWordValue(int address, int value)
947 if (CONFIG_WORD_ADDRESS == address)
950 else if (CONFIG2_WORD_ADDRESS == address)
951 config2_word = value;
953 //fprintf(stderr,"setting config word 0x%x to 0x%x\n", address, value);
956 /*-----------------------------------------------------------------*
957 * int getConfigWord(int address)
959 * Get the current value of a config word.
961 *-----------------------------------------------------------------*/
963 int getConfigWord(int address)
967 case CONFIG_WORD_ADDRESS:
970 case CONFIG2_WORD_ADDRESS:
978 /*-----------------------------------------------------------------*
980 *-----------------------------------------------------------------*/
981 unsigned getMaxRam(void)
983 return pic->defMaxRAMaddrs;
987 /*-----------------------------------------------------------------*
988 * int getHasSecondConfigReg(void) - check if the device has a
989 * second config register, rather than just one.
990 *-----------------------------------------------------------------*/
991 int getHasSecondConfigReg(void)
996 return pic->hasSecondConfigReg;
999 /*-----------------------------------------------------------------*
1000 * Query the size of the sharebank of the selected device.
1001 * FIXME: Currently always returns 16.
1002 *-----------------------------------------------------------------*/
1003 int pic14_getSharebankSize(void)
1008 /*-----------------------------------------------------------------*
1009 * Query the highest byte address occupied by the sharebank of the
1011 * FIXME: Currently always returns 0x7f.
1012 * THINK: Might not be needed, if we assign all shareable objects to
1013 * a `udata_shr' section and let the linker do the rest...
1014 * Tried it, but yields `no target memory available' for pic16f877...
1015 *-----------------------------------------------------------------*/
1016 int pic14_getSharebankAddress(void)
1018 int sharebankAddress = 0x7f;
1019 /* If total RAM is less than 0x7f as with 16f84 then reduce
1020 * sharebankAddress to fit */
1021 if ((unsigned)sharebankAddress > getMaxRam())
1022 sharebankAddress = (int)getMaxRam();
1023 return sharebankAddress;