Riaan Cillie
Make a copy of the vector table and set the STM32 vector table offset to the new table. Program freezes soon after.
Revision 0:97bd31dcc8c2, committed 2015-07-25
- Comitter:
- riaancillie
- Date:
- Sat Jul 25 20:11:51 2015 +0000
- Commit message:
- Test vector table relocation;
Changed in this revision
| main.cpp | Show annotated file Show diff for this revision Revisions of this file |
| mbed.bld | Show annotated file Show diff for this revision Revisions of this file |
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp Sat Jul 25 20:11:51 2015 +0000
@@ -0,0 +1,43 @@
+#include "mbed.h"
+
+//------------------------------------
+// Hyperterminal configuration
+// 115200 bauds, 8-bit data, no parity
+//------------------------------------
+
+Serial pc(SERIAL_TX, SERIAL_RX);
+DigitalOut myled(LED1);
+
+extern uint32_t __Vectors[];
+#define VECTORTABLE_SIZE (512)
+#define VECTORTABLE_ALIGNMENT (0x200ul)
+uint32_t vectorTable_RAM[VECTORTABLE_SIZE] __attribute__(( aligned (VECTORTABLE_ALIGNMENT) ));
+int j;
+
+int main() {
+ int i = 1;
+ pc.baud(115200);
+ pc.printf("Hello World !\r\n");
+
+ //Duplicate and relocate the vector table
+ for (i = 0; i < VECTORTABLE_SIZE; i++) {
+ vectorTable_RAM[i] = __Vectors[i]; /* copy vector table to RAM */
+ }
+ __disable_irq();
+ SCB->VTOR = (uint32_t)(&vectorTable_RAM);
+ __DSB();
+ __enable_irq();
+
+ //Print 100 lines - this is where things just go wrong and the program freezes
+ for (j = 0; j <= 100; j++)
+ {
+ pc.printf("test %d\r\n", j);
+ }
+
+ while(1) {
+ wait(1);
+ pc.printf("This program runs since %d seconds.\r\n", i++);
+ myled = !myled;
+ }
+}
+
\ No newline at end of file
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed.bld Sat Jul 25 20:11:51 2015 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/mbed_official/code/mbed/builds/bad568076d81 \ No newline at end of file