Hi All I have use function pointer array like this main.c uchar i; for(i = 0;i<END_COMMAND;i++) printf("%bu %x\n",i,Func_table[i]); cmd.h typedef void (*Func) (void); void init_func(void); void reset_func(void); void end_command(void); cmd.c Func Func_Table[] = { init_func, reset_func, end_command } void init_func(void){DO_SOMETHING} void reset_func(void){DO_SOMETHING} void end_command(void){DO_SOMETHING} When I run in Keil IDE Debug mode it can trace into code and print correct function address (Ex 0 ff00 1 ff10 2 ff20) ,but when I run into flash,all function address is print zero(ex 0 0 1 0 2 0) so I got reset when use this Func_Table why?? Thanks a lot
First of all, be very wary of using function pointers on 8051s. It can be done, but it should be used sparingly and very carefully. "Thou hast been warnd". The problem at hand is that your printf() statement is wrong. 1) You're trying to print a pointer as if it were a number. That's always a bad idea. The %p format specifier exists for a reason. 2) You're doing this with a function pointer. That's even worse. 3) You're doing printf() debugging in a compiler that comes with a very powerful integrated debugger. That's just a waste of your time.
Looks like you have a problem with RAM in your target hardware. Take a look to the linker map file and check if you have actually RAM there. Since your function pointers are somehow constants, you should declare them as code *. Take a look to: http://www.keil.com/support/docs/996.htm http://www.keil.com/support/docs/210.htm See also: http://www.keil.com/forum/docs/thread1502.asp Reinhard
Hi I have try to use code like this code void (*Func_Table []) (void)= { a,b } but it cann't run any more,even the main function also cann't run any code !! why?? Please help TYPE BASE LENGTH RELOCATION SEGMENT NAME ----------------------------------------------------- * * * * * * * D A T A M E M O R Y * * * * * * * REG 0000H 0008H ABSOLUTE "REG BANK 0" DATA 0008H 0011H UNIT ?DT?MPG450 DATA 0019H 0005H UNIT _DATA_GROUP_ 001EH 0002H *** GAP *** BIT 0020H.0 0001H.1 UNIT _BIT_GROUP_ 0021H.1 0000H.7 *** GAP *** IDATA 0022H 0001H UNIT ?STACK * * * * * * * X D A T A M E M O R Y * * * * * * * XDATA 0000H 013CH UNIT ?XD?MPG450 XDATA 013CH 0028H UNIT _XDATA_GROUP_ XDATA 0164H 0020H UNIT ?XD?DDRAMC_BIST_MODE?DDRAMC XDATA 0184H 0019H UNIT ?XD?_RS232_PROCESS?DEBUG XDATA 019DH 0007H UNIT ?XD?DDRAMC_INT_HANDER?DDRAMC XDATA 01A4H 0007H UNIT ?XD?_FIND_BIST_CLK?FUNC XDATA 01ABH 0006H UNIT ?XD?SET_EMPG_VIDEO_TYPE?USERCMD XDATA 01B1H 0005H UNIT ?XD?DMPG_INT_HANDER?DMPG XDATA 01B6H 0005H UNIT ?XD?_CHANGE_VIDEO_SIZE?FUNC XDATA 01BBH 0005H UNIT ?XD?SET_DISPLAY_OUTPUT_PATH?USERCMD XDATA 01C0H 0003H UNIT ?XD?_DMA_TASK_SCHEDULER?MPG450 XDATA 01C3H 0003H UNIT ?XD?PDMAC_INT_HANDER?PDMAC XDATA 01C6H 0003H UNIT ?XD?DRAMC_BIST?FUNC XDATA 01C9H 0003H UNIT ?XD?SET_EMPG_FRAME_RATE?USERCMD XDATA 01CCH 0003H UNIT ?XD?SET_EMPG_QTABLE?USERCMD XDATA 01CFH 0003H UNIT ?XD?GET_VIDEO_MOTION_STATUS?USERCMD XDATA 01D2H 0003H UNIT ?XD?SET_VIDEO_MOTION_REGION?USERCMD XDATA 01D5H 0003H UNIT ?XD?SET_EADPCM_BPS?USERCMD XDATA 01D8H 0002H UNIT ?XD?EDRAMC_INT_HANDER?EDRAMC XDATA 01DAH 0002H UNIT ?XD?_DDRAMC_CONFIG?DDRAMC XDATA 01DCH 0002H UNIT ?XD?PCIC51_INT_HANDER?PCIC51 XDATA 01DEH 0002H UNIT ?XD?SET_CHECKSUM?FUNC XDATA 01E0H 0002H UNIT ?XD?START_ALL?USERCMD XDATA 01E2H 0002H UNIT ?XD?SET_CHIP_REGISTER?USERCMD XDATA 01E4H 0002H UNIT ?XD?GET_CHIP_REGISTER?USERCMD XDATA 01E6H 0002H UNIT ?XD?START_VIDEO?USERCMD XDATA 01E8H 0002H UNIT ?XD?START_EMPG?USERCMD XDATA 01EAH 0002H UNIT ?XD?START_DMPG?USERCMD XDATA 01ECH 0002H UNIT ?XD?START_DISPLAY?USERCMD XDATA 01EEH 0002H UNIT ?XD?START_EADPCM?USERCMD XDATA 01F0H 0002H UNIT ?XD?SET_EMPG_WATERMARK_INFO?USERCMD XDATA 01F2H 0002H UNIT ?XD?SET_EMPG_FRAME_BASE?USERCMD XDATA 01F4H 0002H UNIT ?XD?SET_EMPG_AV_SYNC?USERCMD XDATA 01F6H 0002H UNIT ?XD?SET_DMPG_CH_LEN?USERCMD XDATA 01F8H 0002H UNIT ?XD?SET_VIDEO_MOTION_CTRL?USERCMD XDATA 01FAH 0002H UNIT ?XD?SET_VIDEO_DEINTER_MODE?USERCMD XDATA 01FCH 0002H UNIT ?XD?SET_DISPLAY_SIZE?USERCMD XDATA 01FEH 0002H UNIT ?XD?SET_DISPLAY_QUAD?USERCMD XDATA 0200H 0002H UNIT ?XD?SET_DISPLAY_BACKGROUND?USERCMD XDATA 0202H 0002H UNIT ?XD?SET_EADPCM_BYPASS?USERCMD XDATA 0204H 0002H UNIT ?XD?SET_DADPCM_BPS?USERCMD XDATA 0206H 0002H UNIT ?XD?SET_DADPCM_VOLUME?USERCMD XDATA 0208H 0002H UNIT ?XD?SET_DATA_CH_LEN?USERCMD
XDATA 020AH 0002H UNIT ?XD?SET_HCBR?USERCMD XDATA 020CH 0001H UNIT ?XD?CPU_UR0_INIT?CPU_API XDATA 020DH 0001H UNIT ?XD?_PDMAC_START?MPG450 XDATA 020EH 0001H UNIT ?XD?SYSTEM_INIT?MPG450 XDATA 020FH 0001H UNIT ?XD?_EDRAMC_CONFIG?EDRAMC XDATA 0210H 0001H UNIT ?XD?_EDRAMC_INIT?EDRAMC XDATA 0211H 0001H UNIT ?XD?_DDRAMC_INIT?DDRAMC XDATA 0212H 0001H UNIT ?XD?_CHECK_DMPG_TIMECODE?DMPG XDATA 0213H 0001H UNIT ?XD?RS232_INPUT?DEBUG XDATA 0214H 0001H UNIT ?XD?END_COMMAND?USERCMD XDATA 0215H 0001H UNIT ?XD?START_DADPCM?USERCMD XDATA 0216H 0001H UNIT ?XD?SET_EMPG_IP_RATIO?USERCMD XDATA 0217H 0001H UNIT ?XD?SET_EMPG_EXT_INFO?USERCMD XDATA 0218H 0001H UNIT ?XD?SET_EMPG_QP?USERCMD XDATA 0219H 0001H UNIT ?XD?SET_EMPG_NEW_PREDICTION?USERCMD XDATA 021AH 0001H UNIT ?XD?SET_EMPG_MOTION_VECTOR?USERCMD XDATA 021BH 0001H UNIT ?XD?GET_EMPG_FRAME_BASE?USERCMD XDATA 021CH 0001H UNIT ?XD?SET_DMPG_CLEAR?USERCMD XDATA 021DH 0001H UNIT ?XD?SET_DMPG_SEARCH?USERCMD XDATA 021EH 0001H UNIT ?XD?SET_DMPG_PLAY_MODE?USERCMD XDATA 021FH 0001H UNIT ?XD?SET_DMPG_SPEED?USERCMD XDATA 0220H 0001H UNIT ?XD?SET_DMPG_SEARCH_TIME?USERCMD XDATA 0221H 0001H UNIT ?XD?SET_DMPG_WATERMARK?USERCMD XDATA 0222H 0001H UNIT ?XD?SET_VIDEO_TYPE?USERCMD XDATA 0223H 0001H UNIT ?XD?SET_VIDEO_FRAME_RATE?USERCMD XDATA 0224H 0001H UNIT ?XD?GET_VIDEO_DROP_FRAMES?USERCMD XDATA 0225H 0001H UNIT ?XD?SET_EADPCM_CTRL?USERCMD XDATA 0226H 0001H UNIT ?XD?GET_DADPCM_BPS?USERCMD XDATA 0227H 0001H UNIT ?XD?SET_IRC_FEQ_TUNE?USERCMD XDATA 0228H 0001H UNIT ?XD?GET_HCBR?USERCMD * * * * * * * C O D E M E M O R Y * * * * * * * CODE 0000H 0003H ABSOLUTE CODE 0003H 0007H UNIT ?PR?CPU_EXINT1_SET?CPU_API CODE 000AH 0007H UNIT ?PR?GET_MPG450_STATUS?USERCMD 0011H 0002H *** GAP *** CODE 0013H 0003H ABSOLUTE CODE 0016H 10B7H UNIT ?PR?_RS232_PROCESS?DEBUG CODE 10CDH 0827H UNIT ?PR?DMA_TASK_EXECUTE?MPG450 CODE 18F4H 07E7H UNIT ?PR?DMPG_INT_HANDER?DMPG CODE 20DBH 049EH UNIT ?PR?_DMA_TASK_SCHEDULER?MPG450 CODE 2579H 049CH UNIT ?PR?SET_EMPG_QTABLE?USERCMD CODE 2A15H 0430H UNIT ?PR?DDRAMC_BIST_MODE?DDRAMC CODE 2E45H 0401H UNIT ?CO?DEBUG CODE 3246H 03D3H UNIT ?PR?DDRAMC_INT_HANDER?DDRAMC CODE 3619H 03C2H UNIT ?PR?SET_DISPLAY_OUTPUT_PATH?USERCMD CODE 39DBH 03AFH UNIT ?PR?_DDRAMC_INIT?DDRAMC CODE 3D8AH 0365H UNIT ?PR?PRINTF?PRINTF CODE 40EFH 0350H UNIT ?PR?SET_EMPG_EXT_INFO?USERCMD CODE 443FH 0336H UNIT ?PR?GET_DADPCM_TIMECODE?USERCMD CODE 4775H 02CAH UNIT ?PR?SET_EMPG_WATERMARK_INFO?USERCMD CODE 4A3FH 0281H UNIT ?PR?_CHECK_DMPG_TIMECODE?DMPG CODE 4CC0H 022BH UNIT ?PR?SET_DISPLAY_BACKGROUND?USERCMD CODE 4EEBH 0218H UNIT ?PR?SET_HCBR?USERCMD CODE 5103H 0203H UNIT ?PR?SET_EMPG_VIDEO_TYPE?USERCMD CODE 5306H 01FEH UNIT ?C?LIB_CODE CODE 5504H 01E5H UNIT ?PR?_CHANGE_VIDEO_SIZE?FUNC
Did you really try to get an understanding for what we are saying on this discussion forum? Reinhard
Sorry ^^""" I just add [code] like you say, but when I add the [code] key word my program cann't not run any more if I remove code ,it can run but will get reset when I use the Func_Table I add like this code void (*Func_Table []) (void)= { init_func, reset_func } I have try to see the m51 file, but I cann't see any start address or length like this SEGMENT DATA_GROUP +--> CALLED SEGMENT START LENGTH ------------------------------------------------- ?C_C51STARTUP ----- ----- +--> ?PR?MAIN?FPMAIN ?PR?MAIN?FPMAIN ----- ----- +--> ?PR?_FUNC?FPMAIN +--> ?PR?_FUNC_CALLER?FPCALLER ?PR?_FUNC?FPMAIN 0008H 000AH ?PR?_FUNC_CALLER?FPCALLER 0008H 0003H ^^^^^^^^^^ I cann't find this!! Thanks a lot
sorry ^^""" May you teach me how to check the lineker map?? If my target hardwave already has ram how to avoid it?? how to locate the data or code in another place?? Thanks a lot
TYPE BASE LENGTH RELOCATION SEGMENT NAME ----------------------------------------------------- * * * * * * * D A T A M E M O R Y * * * * * * * REG 0000H 0008H ABSOLUTE "REG BANK 0" DATA 0008H 0005H UNIT _DATA_GROUP_ 000DH 0013H *** GAP *** BIT 0020H.0 0001H.1 UNIT _BIT_GROUP_ 0021H.1 0000H.7 *** GAP *** IDATA 0022H 0001H UNIT ?STACK * * * * * * * X D A T A M E M O R Y * * * * * * * XDATA 0000H 011CH UNIT ?XD?MPG450 XDATA 011CH 0028H UNIT _XDATA_GROUP_ XDATA 0144H 0019H UNIT ?XD?_RS232_PROCESS?DEBUG XDATA 015DH 0009H UNIT ?XD?_DMA_TASK_SCHEDULER?MPG450 XDATA 0166H 0008H UNIT ?XD?DMA_TASK_EXECUTE?MPG450 XDATA 016EH 0005H UNIT ?XD?_CHANGE_VIDEO_SIZE?FUNC XDATA 0173H 0003H UNIT ?XD?EXINT1_INT_ROUTINE?MPG450 XDATA 0176H 0003H UNIT ?XD?DRAMC_BIST?FUNC XDATA 0179H 0002H UNIT ?XD?SET_CHECKSUM?FUNC XDATA 017BH 0001H UNIT ?XD?CPU_UR0_INIT?CPU_API XDATA 017CH 0001H UNIT ?XD?_PDMAC_START?MPG450 XDATA 017DH 0001H UNIT ?XD?MAIN?MPG450 XDATA 017EH 0001H UNIT ?XD?RS232_INPUT?DEBUG BL51 BANKED LINKER/LOCATER V5.03 07/27/2005 10:40:44 PAGE 2 XDATA 017FH 0001H UNIT ?XD?END_COMMAND?USERCMD * * * * * * * C O D E M E M O R Y * * * * * * * CODE 0000H 0003H ABSOLUTE CODE 0003H 000CH UNIT ?PR?SET_CHECKSUM?FUNC CODE 000FH 0001H UNIT ?PR?INIT_MPG450?USERCMD CODE 0010H 0001H UNIT ?PR?RESET_MPG450?USERCMD 0011H 0002H *** GAP *** CODE 0013H 0003H ABSOLUTE CODE 0016H 07CAH UNIT ?PR?_RS232_PROCESS?DEBUG CODE 07E0H 07B2H UNIT ?PR?DMA_TASK_EXECUTE?MPG450 CODE 0F92H 054AH UNIT ?PR?_DMA_TASK_SCHEDULER?MPG450 CODE 14DCH 0365H UNIT ?PR?PRINTF?PRINTF CODE 1841H 023FH UNIT ?CO?DEBUG CODE 1A80H 0194H UNIT ?PR?_CHANGE_VIDEO_SIZE?FUNC CODE 1C14H 0194H UNIT ?C?LIB_CODE CODE 1DA8H 0135H UNIT ?PR?RS232_INPUT?DEBUG CODE 1EDDH 010AH UNIT ?PR?WDT_RESET?WDTC CODE 1FE7H 0109H UNIT ?C_INITSEG CODE 20F0H 00C8H UNIT ?PR?EXINT1_INT_ROUTINE?MPG450 CODE 21B8H 009AH UNIT ?PR?_PDMAC_START?MPG450 CODE 2252H 0090H UNIT ?PR?SYSTEM_INIT?MPG450 CODE 22E2H 008CH UNIT ?C_C51STARTUP CODE 236EH 0070H UNIT ?PR?MAIN?MPG450 CODE 23DEH 0043H UNIT ?PR?BUS_READY?FUNC CODE 2421H 0041H UNIT ?PR?SHOW_MENU?DEBUG CODE 2462H 0037H UNIT ?PR?DRAMC_BIST?FUNC CODE 2499H 0036H UNIT ?PR?WDTC_INIT?WDTC CODE 24CFH 0034H UNIT ?PR?CPU_RAM_INIT?CPU_API CODE 2503H 0032H UNIT ?PR?CPU_UR0_INIT?CPU_API CODE 2535H 0027H UNIT ?PR?PUTCHAR?PUTCHAR CODE 255CH 0026H UNIT ?CO?MPG450 CODE 2582H 0026H UNIT ?PR?END_COMMAND?USERCMD CODE 25A8H 001DH UNIT ?PR?TOINT?TOINT CODE 25C5H 000AH UNIT ?PR?_GETKEY?_GETKEY CODE 25CFH 0007H UNIT ?PR?CPU_EXINT1_SET?CPU_API
TYPE BASE LENGTH RELOCATION SEGMENT NAME ----------------------------------------------------- * * * * * * * D A T A M E M O R Y * * * * * * * REG 0000H 0008H ABSOLUTE "REG BANK 0" DATA 0008H 0005H UNIT _DATA_GROUP_ 000DH 0013H *** GAP *** BIT 0020H.0 0001H.1 UNIT _BIT_GROUP_ 0021H.1 0000H.7 *** GAP *** IDATA 0022H 0001H UNIT ?STACK * * * * * * * X D A T A M E M O R Y * * * * * * * XDATA 0000H 009CH UNIT ?XD?MPG450 XDATA 009CH 0028H UNIT _XDATA_GROUP_ XDATA 00C4H 0019H UNIT ?XD?_RS232_PROCESS?DEBUG XDATA 00DDH 0009H UNIT ?XD?_DMA_TASK_SCHEDULER?MPG450 XDATA 00E6H 0008H UNIT ?XD?DMA_TASK_EXECUTE?MPG450 XDATA 00EEH 0005H UNIT ?XD?_CHANGE_VIDEO_SIZE?FUNC XDATA 00F3H 0003H UNIT ?XD?EXINT1_INT_ROUTINE?MPG450 XDATA 00F6H 0003H UNIT ?XD?DRAMC_BIST?FUNC XDATA 00F9H 0002H UNIT ?XD?SET_CHECKSUM?FUNC XDATA 00FBH 0001H UNIT ?XD?CPU_UR0_INIT?CPU_API XDATA 00FCH 0001H UNIT ?XD?_PDMAC_START?MPG450 XDATA 00FDH 0001H UNIT ?XD?MAIN?MPG450 XDATA 00FEH 0001H UNIT ?XD?RS232_INPUT?DEBUG BL51 BANKED LINKER/LOCATER V5.03 07/27/2005 10:38:22 PAGE 2 XDATA 00FFH 0001H UNIT ?XD?END_COMMAND?USERCMD * * * * * * * C O D E M E M O R Y * * * * * * * CODE 0000H 0003H ABSOLUTE CODE 0003H 000CH UNIT ?PR?SET_CHECKSUM?FUNC CODE 000FH 0001H UNIT ?PR?INIT_MPG450?USERCMD CODE 0010H 0001H UNIT ?PR?RESET_MPG450?USERCMD 0011H 0002H *** GAP *** CODE 0013H 0003H ABSOLUTE CODE 0016H 07CAH UNIT ?PR?_RS232_PROCESS?DEBUG CODE 07E0H 07B2H UNIT ?PR?DMA_TASK_EXECUTE?MPG450 CODE 0F92H 054AH UNIT ?PR?_DMA_TASK_SCHEDULER?MPG450 CODE 14DCH 0365H UNIT ?PR?PRINTF?PRINTF CODE 1841H 023FH UNIT ?CO?DEBUG CODE 1A80H 0194H UNIT ?PR?_CHANGE_VIDEO_SIZE?FUNC CODE 1C14H 0194H UNIT ?C?LIB_CODE CODE 1DA8H 0135H UNIT ?PR?RS232_INPUT?DEBUG CODE 1EDDH 010AH UNIT ?PR?WDT_RESET?WDTC CODE 1FE7H 00C8H UNIT ?PR?EXINT1_INT_ROUTINE?MPG450 CODE 20AFH 009AH UNIT ?PR?_PDMAC_START?MPG450 CODE 2149H 0090H UNIT ?PR?SYSTEM_INIT?MPG450 CODE 21D9H 008CH UNIT ?C_C51STARTUP CODE 2265H 0085H UNIT ?C_INITSEG CODE 22EAH 0070H UNIT ?PR?MAIN?MPG450 CODE 235AH 0043H UNIT ?PR?BUS_READY?FUNC CODE 239DH 0041H UNIT ?PR?SHOW_MENU?DEBUG CODE 23DEH 0037H UNIT ?PR?DRAMC_BIST?FUNC CODE 2415H 0036H UNIT ?PR?WDTC_INIT?WDTC CODE 244BH 0034H UNIT ?PR?CPU_RAM_INIT?CPU_API CODE 247FH 0032H UNIT ?PR?CPU_UR0_INIT?CPU_API CODE 24B1H 0027H UNIT ?PR?PUTCHAR?PUTCHAR CODE 24D8H 0026H UNIT ?CO?MPG450 CODE 24FEH 0026H UNIT ?PR?END_COMMAND?USERCMD CODE 2524H 001DH UNIT ?PR?TOINT?TOINT CODE 2541H 000AH UNIT ?PR?_GETKEY?_GETKEY CODE 254BH 0007H UNIT ?PR?CPU_EXINT1_SET?CPU_API
Sorry May anyone tell me what is the diffent between this two linker map The fisrt one cann't run any thing!! The second will get reset when use function pointer table The source code only has one place diffent the first add [ code ] key word !! Thanks a lot
I think nobody is able to figure out your programming problem from the posted MAP files. When you get a RESET, you should analyse the problem using the debugger. I suggest that you start with a small example frist. Take a look to A51.PDF, Chapter 9, Using the Overlay Control, Pointer to a Function in Arrays or Tables. Reinhard
Thanks The Code I have run very well before, I just distributed code into many c file add [code] key world cann't run any, I add [NOOVERLAY],the result is the same>< Thanks again,I will try to read DOC more