Hello, I am learning WinARM and newlib, I am using WinARM version 20060606, and my target board is Keil MCB2300 demo board with LPC2387. The attached file is my source code, my project is modify from http://www.siwawi.arubi.uni-kl.de/avr_projects/arm_projects/lpc2378_demo1_20070629.zip, I add the syscall.c for newlib, it works fine to print integer to COM0 or COM1, but it doesn’t work with floating point (e.g. printf(“%f”, 3.14);), the processor always crash when I print a floating point. (sorry, I can’t sure what happen because I don’t have a JTAG debugger, I guess the program is dead because the LED doesn’t blinking anymore.) Could there something be wrong with the syscall.c? One more question, does newlib-lpc library can support LPC23XX serial? compiler message as below: -------- begin (mode: ROM_RUN) -------- arm-elf-gcc (GCC) 4.1.1 (WinARM) Copyright (C) 2006 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. Assembling (ARM-only): Common/src/Startup.S arm-elf-gcc -c -mcpu=arm7tdmi-s -mthumb-interwork -I. -x assembler-with-cpp -DROM_RUN -D__WinARM__ -D__WINARMSUBMDL_LPC2378__ -Wa,-adhlns=Common/src/Startup.lst,-gdwarf-2 Common/src/Startup.S -o Common/src/Startup.o Assembling (ARM-only): Common/src/swi_handler.S arm-elf-gcc -c -mcpu=arm7tdmi-s -mthumb-interwork -I. -x assembler-with-cpp -DROM_RUN -D__WinARM__ -D__WINARMSUBMDL_LPC2378__ -Wa,-adhlns=Common/src/swi_handler.lst,-gdwarf-2 Common/src/swi_handler.S -o Common/src/swi_handler.o Compiling C: main.c arm-elf-gcc -c -mthumb -mcpu=arm7tdmi-s -mthumb-interwork -I. -gdwarf-2 -DROM_RUN -D__WinARM__ -D__WINARMSUBMDL_LPC2378__ -Os -Wall -Wcast-align -Wimplicit -Wpointer-arith -Wswitch -ffunction-sections -fdata-sections -Wredundant-decls -Wreturn-type -Wshadow -Wunused -Wa,-adhlns=main.lst -ICommon/inc -Wcast-qual -MD -MP -MF .dep/main.o.d -Wnested-externs -std=gnu99 -Wmissing-prototypes -Wstrict-prototypes -Wmissing-declarations main.c -o main.o main.c: In function 'main': main.c:99: warning: unused variable 'f' main.c:127: warning: 'errno' is used uninitialized in this function Compiling C: fio.c arm-elf-gcc -c -mthumb -mcpu=arm7tdmi-s -mthumb-interwork -I. -gdwarf-2 -DROM_RUN -D__WinARM__ -D__WINARMSUBMDL_LPC2378__ -Os -Wall -Wcast-align -Wimplicit -Wpointer-arith -Wswitch -ffunction-sections -fdata-sections -Wredundant-decls -Wreturn-type -Wshadow -Wunused -Wa,-adhlns=fio.lst -ICommon/inc -Wcast-qual -MD -MP -MF .dep/fio.o.d -Wnested-externs -std=gnu99 -Wmissing-prototypes -Wstrict-prototypes -Wmissing-declarations fio.c -o fio.o Compiling C: uart.c arm-elf-gcc -c -mthumb -mcpu=arm7tdmi-s -mthumb-interwork -I. -gdwarf-2 -DROM_RUN -D__WinARM__ -D__WINARMSUBMDL_LPC2378__ -Os -Wall -Wcast-align -Wimplicit -Wpointer-arith -Wswitch -ffunction-sections -fdata-sections -Wredundant-decls -Wreturn-type -Wshadow -Wunused -Wa,-adhlns=uart.lst -ICommon/inc -Wcast-qual -MD -MP -MF .dep/uart.o.d -Wnested-externs -std=gnu99 -Wmissing-prototypes -Wstrict-prototypes -Wmissing-declarations uart.c -o uart.o Compiling C: syscall.c arm-elf-gcc -c -mthumb -mcpu=arm7tdmi-s -mthumb-interwork -I. -gdwarf-2 -DROM_RUN -D__WinARM__ -D__WINARMSUBMDL_LPC2378__ -Os -Wall -Wcast-align -Wimplicit -Wpointer-arith -Wswitch -ffunction-sections -fdata-sections -Wredundant-decls -Wreturn-type -Wshadow -Wunused -Wa,-adhlns=syscall.lst -ICommon/inc -Wcast-qual -MD -MP -MF .dep/syscall.o.d -Wnested-externs -std=gnu99 -Wmissing-prototypes -Wstrict-prototypes -Wmissing-declarations syscall.c -o syscall.o syscall.c:45: warning: no previous prototype for '_read_r' syscall.c:50: warning: no previous prototype for '_write_r' syscall.c:55: warning: no previous prototype for '_open_r' syscall.c:79: warning: no previous prototype for '_close_r' syscall.c:84: warning: no previous prototype for '_lseek_r' syscall.c:89: warning: no previous prototype for '_fstat_r' syscall.c:136: warning: no previous prototype for '_sbrk_r' syscall.c: In function 'com1_write_r': syscall.c:162: warning: pointer targets in passing argument 2 of 'UARTSend' differ in signedness syscall.c: In function 'com0_write_r': syscall.c:196: warning: pointer targets in passing argument 2 of 'UARTSend' differ in signedness Compiling C: Common/src/timer.c arm-elf-gcc -c -mthumb -mcpu=arm7tdmi-s -mthumb-interwork -I. -gdwarf-2 -DROM_RUN -D__WinARM__ -D__WINARMSUBMDL_LPC2378__ -Os -Wall -Wcast-align -Wimplicit -Wpointer-arith -Wswitch -ffunction-sections -fdata-sections -Wredundant-decls -Wreturn-type -Wshadow -Wunused -Wa,-adhlns=Common/src/timer.lst -ICommon/inc -Wcast-qual -MD -MP -MF .dep/timer.o.d -Wnested-externs -std=gnu99 -Wmissing-prototypes -Wstrict-prototypes -Wmissing-declarations Common/src/timer.c -o Common/src/timer.o Compiling C: Common/src/target.c arm-elf-gcc -c -mthumb -mcpu=arm7tdmi-s -mthumb-interwork -I. -gdwarf-2 -DROM_RUN -D__WinARM__ -D__WINARMSUBMDL_LPC2378__ -Os -Wall -Wcast-align -Wimplicit -Wpointer-arith -Wswitch -ffunction-sections -fdata-sections -Wredundant-decls -Wreturn-type -Wshadow -Wunused -Wa,-adhlns=Common/src/target.lst -ICommon/inc -Wcast-qual -MD -MP -MF .dep/target.o.d -Wnested-externs -std=gnu99 -Wmissing-prototypes -Wstrict-prototypes -Wmissing-declarations Common/src/target.c -o Common/src/target.o Compiling C: Common/src/irq.c arm-elf-gcc -c -mthumb -mcpu=arm7tdmi-s -mthumb-interwork -I. -gdwarf-2 -DROM_RUN -D__WinARM__ -D__WINARMSUBMDL_LPC2378__ -Os -Wall -Wcast-align -Wimplicit -Wpointer-arith -Wswitch -ffunction-sections -fdata-sections -Wredundant-decls -Wreturn-type -Wshadow -Wunused -Wa,-adhlns=Common/src/irq.lst -ICommon/inc -Wcast-qual -MD -MP -MF .dep/irq.o.d -Wnested-externs -std=gnu99 -Wmissing-prototypes -Wstrict-prototypes -Wmissing-declarations Common/src/irq.c -o Common/src/irq.o Linking: main.elf arm-elf-gcc -mthumb -mcpu=arm7tdmi-s -mthumb-interwork -I. -gdwarf-2 -DROM_RUN -D__WinARM__ -D__WINARMSUBMDL_LPC2378__ -Os -Wall -Wcast-align -Wimplicit -Wpointer-arith -Wswitch -ffunction-sections -fdata-sections -Wredundant-decls -Wreturn-type -Wshadow -Wunused -Wa,-adhlns=Common/src/Startup.lst -ICommon/inc -Wcast-qual -MD -MP -MF .dep/main.elf.d Common/src/Startup.o Common/src/swi_handler.o main.o fio.o uart.o syscall.o Common/src/timer.o Common/src/target.o Common/src/irq.o --output main.elf -nostartfiles -Wl,-Map=main.map,--cref,--gc-sections -lc -lm -L../arm-elf/lib -lnosys -TCommon//LPC2378-ROM.ld Creating load file for Flash: main.hex arm-elf-objcopy -O ihex main.elf main.hex Creating load file for Flash: main.bin arm-elf-objcopy -O binary main.elf main.bin Creating Extended Listing: main.lss arm-elf-objdump -h -S -C main.elf > main.lss Creating Symbol Table: main.sym arm-elf-nm -n main.elf > main.sym Size after: main.elf : section size addr .text 12712 0 .data 2104 1073741824 .bss 204 1073743928 .stack 1024 1073744384 .comment 918 0 .debug_aranges 680 0 .debug_pubnames 924 0 .debug_info 9787 0 .debug_abbrev 2195 0 .debug_line 2272 0 .debug_frame 996 0 .debug_str 2324 0 .debug_loc 2816 0 .debug_ranges 48 0 Total 39004 Errors: none -------- end -------- Thanks for any help. Batoo
Batoo Lee wrote: Hi everyone, I can printf float/double well finally, in the past few days I studied uC/OS-II and changed processor mode form USER to SVC mode, and the printf works well with float/double. so I guess newlib needs run in privileged mode.
Batoo Lee wrote:
> so I guess newlib needs run in privileged mode.
Not in my experience.
Clifford Slocombe wrote: > Batoo Lee wrote: >> so I guess newlib needs run in privileged mode. > > Not in my experience. Hi Clifford, I check this problem again, you are correct. The problem doesn't cause by operating mode, the problem is the stack size too small, originally the stack size is 0x100, and I change it to 0x400 can fix the problem. Thank you, Batoo
Batoo Lee wrote: > the problem is the stack size too small, > originally the stack size is 0x100, > and I change it to 0x400 can fix the problem. Ah! Sorry, should have noticed that, formatted I/O does need about 4k for stack.
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