generated from Embedded_Projects/CH32V307_Template
43 lines
1.3 KiB
C
43 lines
1.3 KiB
C
#include "ch32v30x_it.h"
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#define __IRQ __attribute__((interrupt()))
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#define __IRQ_WEAK __attribute__((interrupt(), weak))
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#define __IRQ_NAKED __attribute__((naked))
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/**
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* FreeRTOS supports both non-vectored and vectored exception model.
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* For non-vectored exception, use `freertos_risc_v_trap_handler`,
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* this function will determine the type of current exception.
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* For vectored exception, use `freertos_risc_v_exception_handler`,
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* and use `freertos_risc_v_mtimer_interrupt_handler` for timer interrupt.
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*
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*/
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/**
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* @brief M mode ecall handler
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*
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*/
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__IRQ_NAKED void Ecall_M_Mode_Handler(void) {
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/* Use naked function to generate a short call, without saving stack. */
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asm("j freertos_risc_v_trap_handler");
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}
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/**
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* @brief SysTick interrupt handler
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*
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* @return __IRQ_NAKED
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*/
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__IRQ_NAKED void SysTick_Handler(void) {
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/* Use naked function to generate a short call, without causing stack unbalance. */
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asm volatile(
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"addi sp, sp, -4\n" /* Push */
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"sw t0, 4(sp)\n" /* Save t0 on stack */
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"li t0, 0xE000F004\n" /* SysTick->SR */
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"sw zero, 0(t0)\n" /* Write 0 to clear */
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"lw t0, 4(sp)\n" /* Restore t0 from stack */
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"addi sp, sp, 4\n" /* Pop */
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"j freertos_risc_v_mtimer_interrupt_handler"
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);
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}
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