tool/mbed/mbed-sdk/libraries/tests/mbed/vtor_reloc/main.cpp

   1 // Interrupt table relocation test, based on the 'interrupt_in' test
   2 // It will test an interrupt pin before and after the interrupt table is relocated
   3 // Works only on LPC1768
   4
   5 #include "test_env.h"
   6 #include "cmsis_nvic.h"
   7 #include <string.h>
   8
   9 #define PIN_IN      (p5)
  10 #define PIN_OUT     (p25)
  11 #define NUM_VECTORS (16+33)
  12
  13 DigitalOut out(PIN_OUT);
  14 DigitalOut myled(LED1);
  15
  16 volatile int checks = 0;
  17 uint32_t int_table[NUM_VECTORS] __attribute__ ((aligned(256)));
  18
  19 #define FALLING_EDGE_COUNT 5
  20
  21 void flipper() {
  22     for (int i = 0; i < FALLING_EDGE_COUNT; i++) {
  23         out = 1;
  24         wait(0.2);
  25         out = 0;
  26         wait(0.2);
  27     }
  28 }
  29
  30 void in_handler() {
  31     checks++;
  32     myled = !myled;
  33 }
  34
  35 static bool test_once() {
  36     InterruptIn in(PIN_IN);
  37     checks = 0;
  38     printf("Interrupt table location: 0x%08X\r\n", SCB->VTOR);
  39     in.rise(NULL);
  40     in.fall(in_handler);
  41     flipper();
  42     in.fall(NULL);
  43     bool result = (checks == FALLING_EDGE_COUNT);
  44     printf("Falling edge checks counted: %d ... [%s]\r\n", checks, result ? "OK" : "FAIL");
  45     return result;
  46 }
  47
  48 int main() {
  49     MBED_HOSTTEST_TIMEOUT(15);
  50     MBED_HOSTTEST_SELECT(default_auto);
  51     MBED_HOSTTEST_DESCRIPTION(Interrupt vector relocation);
  52     MBED_HOSTTEST_START("MBED_A18");
  53
  54     // First test, no table reallocation
  55     {
  56         printf("Starting first test (interrupts not relocated).\r\n");
  57         bool ret = test_once();
  58         if (ret == false) {
  59             MBED_HOSTTEST_RESULT(false);
  60         }
  61     }
  62
  63     // Relocate interrupt table and test again
  64     {
  65         printf("Starting second test (interrupts relocated).\r\n");
  66         memcpy(int_table, (void*)SCB->VTOR, sizeof(int_table));
  67         SCB->VTOR = (uint32_t)int_table;
  68
  69         bool ret = test_once();
  70         if (ret == false) {
  71             MBED_HOSTTEST_RESULT(false);
  72         }
  73     }
  74
  75     MBED_HOSTTEST_RESULT(true);
  76 }