Hi,
I am trying to evaluate the nrf52840. I am following the instruction to instrument the FreeRTOS from the Nordic SDK15.3. I managed to follow most of the instructions. The only step I am having a hard time is instrumenting the ARM-CM4F/port.c. The problem is xPortSysTickHandler() does not match the patch file.
My setup includes:
- nrf52840-DK
- SDK15.3
- Segger SystemView v3.10
Below is the patch instruction:
diff -rupN org/Source/portable/GCC/ARM_CM4F/port.c new/Source/portable/GCC/ARM_CM4F/port.c
--- org/Source/portable/GCC/ARM_CM4F/port.c 2017-11-28 13:48:34.000000000 -0800
+++ new/Source/portable/GCC/ARM_CM4F/port.c 2017-12-11 01:16:01.771230000 -0800
@@ -493,14 +493,20 @@ void xPortSysTickHandler( void )
save and then restore the interrupt mask value as its value is already
known. */
portDISABLE_INTERRUPTS();
+ traceISR_ENTER();
{
/* Increment the RTOS tick. */
if( xTaskIncrementTick() != pdFALSE )
{
+ traceISR_EXIT_TO_SCHEDULER();
/* A context switch is required. Context switching is performed in
the PendSV interrupt. Pend the PendSV interrupt. */
portNVIC_INT_CTRL_REG = portNVIC_PENDSVSET_BIT;
}
+ else
+ {
+ traceISR_EXIT();
+ }
}
portENABLE_INTERRUPTS();
}
Below is the freertos.portable.CMSIS.nrf52/port_cmsis_systick.c, xPortSysTickHandler() from the SDK15.3
void xPortSysTickHandler( void )
{
#if configUSE_TICKLESS_IDLE == 1
nrf_rtc_event_clear(portNRF_RTC_REG, NRF_RTC_EVENT_COMPARE_0);
#endif
BaseType_t switch_req = pdFALSE;
uint32_t isrstate = portSET_INTERRUPT_MASK_FROM_ISR();
uint32_t systick_counter = nrf_rtc_counter_get(portNRF_RTC_REG);
nrf_rtc_event_clear(portNRF_RTC_REG, NRF_RTC_EVENT_TICK);
if (configUSE_DISABLE_TICK_AUTO_CORRECTION_DEBUG == 0)
{
/* check FreeRTOSConfig.h file for more details on configUSE_DISABLE_TICK_AUTO_CORRECTION_DEBUG */
TickType_t diff;
diff = (systick_counter - xTaskGetTickCount()) & portNRF_RTC_MAXTICKS;
/* At most 1 step if scheduler is suspended - the xTaskIncrementTick
* would return the tick state from the moment when suspend function was called. */
if ((diff > 1) && (xTaskGetSchedulerState() != taskSCHEDULER_RUNNING))
{
diff = 1;
}
while ((diff--) > 0)
{
switch_req |= xTaskIncrementTick();
}
}
else
{
switch_req = xTaskIncrementTick();
}
/* Increment the RTOS tick as usual which checks if there is a need for rescheduling */
if ( switch_req != pdFALSE )
{
/* A context switch is required. Context switching is performed in
the PendSV interrupt. Pend the PendSV interrupt. */
SCB->ICSR = SCB_ICSR_PENDSVSET_Msk;
__SEV();
}
portCLEAR_INTERRUPT_MASK_FROM_ISR( isrstate );
}
Thank you,
L
