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 -------------------------------------------------------------------------*/
22 PIC device abstraction
24 There are dozens of variations of PIC microcontrollers. This include
25 file attempts to abstract those differences so that SDCC can easily
37 extern char *iComments2;
39 /* memRange - a structure to define a range of valid memory addresses
41 * The Memory of most PICs (and other micros) is a collection of
42 * disjoint chunks. The memRange structure will define the start
43 * and end address of one of these chunks. The memory map of a
44 * particular device is a collection of memRange struct's.
47 typedef struct memRange {
48 int start_address; /* first address in range */
49 int end_address; /* last */
50 int alias; /* bit mask defining how/if memory range is aliased
51 * e.g. alias = 0x80 means start_address is identical
52 * to the memory location at (0x80 | start_address) */
53 int bank; /* PIC memory bank this range occupies */
54 struct memRange *next; /* linked list */
58 /* Processor unique attributes */
59 typedef struct PIC_device {
60 char *name; /* the processor name */
62 memRange *ram; /* RAM memory map */
63 memRange *sfr; /* SFR memory map */
65 int maxRAMaddress; /* maximum value for a data address */
66 int defMaxRAMaddrs; /* default maximum value for a data address */
67 int bankMask; /* Bitmask that is ANDed with address to extract banking bits */
68 // int hasAliasedRAM:1; /* True if there are bank independent registers */
69 int hasSecondConfigReg; /* True if there is a second configuration register */
71 int programMemSize; /* program memory size in words - for device listing only */
72 int dataMemSize; /* data (RAM) memory size in bytes - for device listing only */
73 int eepromMemSize; /* EEPROM memory size in bytes - for device listing only */
74 int ioPins; /* number of I/O pins - for device listing only */
79 PIC_device *init_pic(char *pic_type);
80 int picIsInitialized(void);
81 char *processor_base_name(void);
82 int IS_CONFIG_ADDRESS(int addr);
83 void pic14_assignConfigWordValue(int address, int value);
84 int pic14_emitConfigWord(FILE *vFile);
86 int pic14_allRAMShared(void);
87 int pic14_getSharedStack(int *low, int *high, int *size);
88 PIC_device * pic14_getPIC(void);
90 #endif /* __DEVICE_H__ */