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SAMD21 IRQ priority exploration

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This commit is contained in:
pmantoine 2022-10-16 16:15:02 +08:00
parent 050eb52a22
commit 1c73a3d7bf
2 changed files with 5 additions and 4 deletions
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6
DCCTimerSAMD.cpp
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@ -30,8 +30,6 @@
#include "DCCTimer.h"
#include <wiring_private.h>
#include <DIAG.h>
#include <FSH.h>
INTERRUPT_CALLBACK interruptHandler=0;
@ -71,7 +69,9 @@ void DCCTimer::begin(INTERRUPT_CALLBACK callback) {
// Set the interrupt condition, priority and enable it in the NVIC
TCC0->INTENSET.reg = TCC_INTENSET_OVF; // Only interrupt on overflow
NVIC_SetPriority((IRQn_Type)TCC0_IRQn, 0); // Make this highest priority
int USBprio = NVIC_GetPriority((IRQn_Type) USB_IRQn); // Fetch the USB priority
NVIC_SetPriority((IRQn_Type)TCC0_IRQn, USBprio); // Match the USB priority
// NVIC_SetPriority((IRQn_Type)TCC0_IRQn, 0); // Make this highest priority
NVIC_EnableIRQ((IRQn_Type)TCC0_IRQn); // Enable the interrupt
interrupts();
}

3
I2CManager_SAMD.h
View File

@ -113,7 +113,8 @@ void I2CManagerClass::I2C_init()
#if defined(I2C_USE_INTERRUPTS)
// Setting NVIC
NVIC_EnableIRQ(SERCOM3_IRQn);
NVIC_SetPriority (SERCOM3_IRQn, 0); /* set Priority */
NVIC_SetPriority (SERCOM3_IRQn, SERCOM_NVIC_PRIORITY); // Match default SERCOM priorities
// NVIC_SetPriority (SERCOM3_IRQn, 0); // Set highest priority
// Enable all interrupts
s->I2CM.INTENSET.reg = SERCOM_I2CM_INTENSET_MB | SERCOM_I2CM_INTENSET_SB | SERCOM_I2CM_INTENSET_ERROR;