175 lines
4.9 KiB
Plaintext
175 lines
4.9 KiB
Plaintext
Microchip PIC32 advice
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This chip is supported by the MPLAB IDE and the MPLAB SIMulator.
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These comments apply to version 8.73, Windows Version
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A suitable mirdef.h file would be
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#define MIRACL 32
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#define MR_LITTLE_ENDIAN
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#define mr_utype int
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#define mr_unsign32 unsigned int
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#define MR_IBITS 32
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#define MR_LBITS 32
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#define mr_dltype long long
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#define mr_unsign64 unsigned long long
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#define MR_NOASM
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#define MAXBASE ((mr_small)1<<(MIRACL-1))
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To get started, first build the miracl library from the command line
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by executing this batch file
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copy mirdef.pic mirdef.h
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pic32-gcc -c -O2 -g mrcore.c
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pic32-gcc -c -O2 -g mrarth0.c
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pic32-gcc -c -O2 -g mrarth1.c
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pic32-gcc -c -O2 -g mrarth2.c
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pic32-gcc -c -O2 -g mralloc.c
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pic32-gcc -c -O2 -g mrsmall.c
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pic32-gcc -c -O2 -g mrio1.c
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pic32-gcc -c -O2 -g mrio2.c
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pic32-gcc -c -O2 -g mrgcd.c
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pic32-gcc -c -O2 -g mrjack.c
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pic32-gcc -c -O2 -g mrxgcd.c
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pic32-gcc -c -O2 -g mrarth3.c
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pic32-gcc -c -O2 -g mrbits.c
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pic32-gcc -c -O2 -g mrrand.c
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pic32-gcc -c -O2 -g mrprime.c
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pic32-gcc -c -O2 -g mrcrt.c
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pic32-gcc -c -O2 -g mrscrt.c
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pic32-gcc -c -O2 -g mrmonty.c
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pic32-gcc -c -O2 -g mrpower.c
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pic32-gcc -c -O2 -g mrsroot.c
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pic32-gcc -c -O2 -g mrcurve.c
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pic32-gcc -c -O2 -g mrfast.c
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pic32-gcc -c -O2 -g mrlucas.c
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pic32-gcc -c -O2 -g mrzzn2.c
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pic32-gcc -c -O2 -g mrzzn2b.c
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pic32-gcc -c -O2 -g mrzzn3.c
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pic32-gcc -c -O2 -g mrshs.c
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pic32-gcc -c -O2 -g mrshs256.c
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pic32-gcc -c -O2 -g mrshs512.c
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pic32-gcc -c -O2 -g mraes.c
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pic32-gcc -c -O2 -g mrgcm.c
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pic32-gcc -c -O2 -g mrstrong.c
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pic32-gcc -c -O2 -g mrbrick.c
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pic32-gcc -c -O2 -g mrebrick.c
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pic32-gcc -c -O2 -g mrgf2m.c
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pic32-gcc -c -O2 -g mrec2m.c
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pic32-gcc -c -O2 -g mrecn2.c
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rem copy mrmuldv.ccc mrmuldv.c
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rem pic32-gcc -c -O2 -g mrmuldv.c
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rem
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rem Create library 'miracl.lib'
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del miracl.a
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pic32-ar rc miracl.a mrcore.o mrarth0.o mrarth1.o mrarth2.o mralloc.o mrsmall.o mrgcm.o
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pic32-ar r miracl.a mrio1.o mrio2.o mrjack.o mrgcd.o mrxgcd.o mrarth3.o mrbits.o mrzzn2.o mrzzn3.o
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pic32-ar r miracl.a mrrand.o mrprime.o mrcrt.o mrscrt.o mrmonty.o mrcurve.o mrpower.o mrsroot.o
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pic32-ar r miracl.a mrfast.o mrshs.o mraes.o mrlucas.o mrstrong.o mrbrick.o mrecn2.o
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pic32-ar r miracl.a mrshs256.o mrshs512.o mrebrick.o mrgf2m.o mrec2m.o mrzzn2b.o
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rem pic32-ar r miracl.a mrmuldv.o
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del mr*.o
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Then fire up the MPLAB IDE, and create a project called demo.
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Choose one of the most powerful members of the PIC32 families to start
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with, for example PIC32MX795F512L
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Copy pk-demo.c to demo.c and add this to the project.
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Add the Headers miracl.h and mirdef.h
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Add the library file miracl.a
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Edit demo.c to include at the start
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#include <p32xxxx.h>
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#include <stdio.h>
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void _mon_putc (char c)
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{
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while (U1STAbits.UTXBF);
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U1TXREG = c;
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}
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At the very start of the main() program add
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U1MODEbits.UARTEN = 0x01;
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U1STAbits.UTXEN = 0x01;
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This magic is required to redirect printf() to UART1
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Click on Debugger->Settings and the UART1 IO Tab. Enable UART1 IO
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and redirect the output to a window.
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Click on Project->Build options->project and the Linker Tab.
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Create a heap of 65536 bytes and a stack of 1024 bytes
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Build and Run the program. You should see the output in the Output Window,
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SIM Uart1 Tab
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The PIC32 uses a MIPS core. This architecture does not support a carry flag
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and so Assembly language implementation will not be much faster than
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C generated code.
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To run the application ecdhp32.c, add the same "magic" as before
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to redirect printf to UART1.
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Use as mirdef.h
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#define MIRACL 32
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#define MR_LITTLE_ENDIAN
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#define mr_utype int
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#define mr_unsign32 unsigned int
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#define MR_IBITS 32
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#define MR_LBITS 32
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#define mr_dltype long long
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#define mr_unsign64 unsigned long long
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#define MAXBASE ((mr_small)1<<(MIRACL-1))
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#define MR_COMBA 5
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#define MR_STATIC 5
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#define MR_ALWAYS_BINARY
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#define MR_STRIPPED_DOWN
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#define MR_GENERIC_MT
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#define MR_PSEUDO_MERSENNE
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#define MR_SPECIAL
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#define MR_NOASM
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And build the library from the command line
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mex 5 c mrcomba
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pic32-gcc -c -g mrcore.c
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pic32-gcc -c -g mrarth0.c
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pic32-gcc -c -g mrarth1.c
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pic32-gcc -c -g mrarth2.c
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pic32-gcc -c -g mrsmall.c
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pic32-gcc -c -g mrio1.c
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pic32-gcc -c -g mrjack.c
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pic32-gcc -c -g mrbits.c
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pic32-gcc -c -g mrxgcd.c
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pic32-gcc -c -g mrmonty.c
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pic32-gcc -c -g mrsroot.c
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pic32-gcc -c -g mrcurve.c
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pic32-gcc -c -g mrlucas.c
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pic32-gcc -c -g mrebrick.c
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pic32-gcc -c -g mrcomba.c
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pic32-ar -rc miracl.a mrcore.o mrarth0.o mrarth1.o mrarth2.o mrsmall.o
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pic32-ar -r miracl.a mrio1.o mrjack.o mrxgcd.o
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pic32-ar -r miracl.a mrmonty.o mrcurve.o
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pic32-ar -r miracl.a mrebrick.o mrsroot.o mrlucas.o
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pic32-ar -r miracl.a mrbits.o mrcomba.o
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del mr*.o
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This time no heap is required.
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Note that -O2 optimization causes a problem. However introducing
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each individual optimization from
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http://gcc.gnu.org/onlinedocs/gcc-3.4.4/gcc/Optimize-Options.html
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works fine.
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Note that -O2 optimization works OK with MicroChip's newer MPLAB-X tool,
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which uses a more up-to-date version 4.5 of the GCC compiler.
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