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--- mips_cross_compiler [2014/02/16 01:25]
beckmanf [MIPS Cross Compiler build] changed script
+++ mips_cross_compiler [2014/06/04 17:52] (current)
beckmanf simple project added
@@ Line 91: / Line 91: @@
 # Set the destination
-export MYMIPS=/home/fritz/site
+export MYMIPS=${HOME}/site
 # Versions
@@ Line 454: / Line 454: @@
 </code>
-=== Compile and Run ===
+===== Compile and Run an example =====
+Here is an example mini c code to test the compiler.
+<code c hello.c>
+/* Hello world */
+#include <stdio.h>
+int myfunc(int a, int b){
+  int k;
+  k = a + b;
+  k += 7;
+  k *= 6;
+  return k;
+}
+int main(){
+  int i,j,m;
+  j = 3;
+  m = 2;
+  for(i=0;i<5;i++){
+    m += myfunc(i,j);
+    printf("m is %d\n",m);
+  }
+  return 0;
+}
+</code>
 Compile to Assembler for viewing
-mipsel-none-elf-gcc -S fir.c
+<code>
+mipsel-none-elf-gcc -S hello.c
+</code>
-The output is fir.s which is the assembler code.
+The output assembler code is in hello.s.
 Compile and link ready for simulation with instruction set simulator
-mipsel-none-elf-gcc -o fir -Tidt.ld fir.c
+<code>
+mipsel-none-elf-gcc -o hello -Tidt.ld hello.c
+</code>
 Run the code
-mipsel-none-elf-run fir
+<code>
+mipsel-none-elf-run hello
+</code>
 === Analyze ===
-Produce an annoted source code
+Produce an annoted source code showing how often lines are executed.
-gcc -fprofile-arcs -ftest-coverage -o fir fir.c
+<code>
+gcc -fprofile-arcs -ftest-coverage -o hello hello.c
+./hello
+gcov hello.c
+</code>
-./fir
+This produces the file hello.c.gcov showing the annotated source file.
-gcov fir.c
+=== Tracing in instruction set simulator ===
 Run with instruction tracing in the simulator
 <code>
-mipsel-none-elf-run --trace-insn=on --trace-file trace fir
+mipsel-none-elf-gcc -Tidt.ld -o hello hello.c
+mipsel-none-elf-run --trace-insn=on --trace-file trace hello
 </code>
@@ Line 497: / Line 536: @@
 make check-gcc RUNTESTFLAGS=--target_board=mips-sim
 </code>
+===== Install git and download a simple project  =====
+Install git and download a simple project
+<code>
+sudo apt-get install git
+cd
+mkdir projects
+cd projects
+git clone https://git.etech.fh-augsburg.de/friedrich.beckmann/myfirst.git
+</code>
+Now you have the simple project "myfirst" in your directory.
+=== Try the MIPS Cross Compiler ===
+Change to the src directory and compile the code with the cross compiler.
+<code>
+cd myfirst
+cd src
+mipsel-none-elf-gcc -S hello.c
+less hello.s
+</code>
+Now you have the compiled assembler code "hello.s". To compile to binary do:
+<code>
+mipsel-none-elf-gcc -o hello -Tidt.ld hello.c
+</code>
+Now you have the binary "hello". You can run the binary in the instruction set simulator with
+<code>
+mipsel-none-elf-run hello
+</code>
+This will run the binary with the mips instruction set simulator. You should see "Hello World".
 ===== Open OCD =====
 [[dt_openocd]]