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interrupt: add library to redirect ISR at runtime

spark_strober
King Kévin 4 years ago
parent
commit
1e330bee2f
  1. 120
      lib/interrupt.c
  2. 26
      lib/interrupt.h

120
lib/interrupt.c

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/* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/** BusVoodoo runtime interrupt table
* @file
* @author King Kévin <kingkevin@cuvoodoo.info>
* @date 2018
*/
#include "interrupt.h" // own definitions
vector_table_entry_t interrupt_table[NVIC_IRQ_COUNT] = {0};
/** handler intercepting interrupts and running the function provided in the table */
static void isr_handler(void)
{
// get current IRQ number
uint8_t irq = 0;
if (NVIC_IABR(0)) {
irq = __builtin_ffs(NVIC_IABR(0))-1;
} else if (NVIC_IABR(1)) {
irq = __builtin_ffs(NVIC_IABR(1))+31;
} else if (NVIC_IABR(2)) {
irq = __builtin_ffs(NVIC_IABR(2))+64;
} else {
while (true);
}
// check if the it's a valid IRQ number
if (irq >= NVIC_IRQ_COUNT) {
while (true);
}
// run user provided ISR
if (interrupt_table[irq]) {
(*(void(*)(void))(interrupt_table[irq]))();
} else {
while (true);
}
}
/** use the isr_handler as default ISR
* @note the ISR can still point to other defined function
* @remark from libopencm3/stm32/f1/vector_nvic.c
*/
#pragma weak wwdg_isr = isr_handler
#pragma weak pvd_isr = isr_handler
#pragma weak tamper_isr = isr_handler
#pragma weak rtc_isr = isr_handler
#pragma weak flash_isr = isr_handler
#pragma weak rcc_isr = isr_handler
#pragma weak exti0_isr = isr_handler
#pragma weak exti1_isr = isr_handler
#pragma weak exti2_isr = isr_handler
#pragma weak exti3_isr = isr_handler
#pragma weak exti4_isr = isr_handler
#pragma weak dma1_channel1_isr = isr_handler
#pragma weak dma1_channel2_isr = isr_handler
#pragma weak dma1_channel3_isr = isr_handler
#pragma weak dma1_channel4_isr = isr_handler
#pragma weak dma1_channel5_isr = isr_handler
#pragma weak dma1_channel6_isr = isr_handler
#pragma weak dma1_channel7_isr = isr_handler
#pragma weak adc1_2_isr = isr_handler
#pragma weak usb_hp_can_tx_isr = isr_handler
#pragma weak usb_lp_can_rx0_isr = isr_handler
#pragma weak can_rx1_isr = isr_handler
#pragma weak can_sce_isr = isr_handler
#pragma weak exti9_5_isr = isr_handler
#pragma weak tim1_brk_isr = isr_handler
#pragma weak tim1_up_isr = isr_handler
#pragma weak tim1_trg_com_isr = isr_handler
#pragma weak tim1_cc_isr = isr_handler
#pragma weak tim2_isr = isr_handler
#pragma weak tim3_isr = isr_handler
#pragma weak tim4_isr = isr_handler
#pragma weak i2c1_ev_isr = isr_handler
#pragma weak i2c1_er_isr = isr_handler
#pragma weak i2c2_ev_isr = isr_handler
#pragma weak i2c2_er_isr = isr_handler
#pragma weak spi1_isr = isr_handler
#pragma weak spi2_isr = isr_handler
#pragma weak usart1_isr = isr_handler
#pragma weak usart2_isr = isr_handler
#pragma weak usart3_isr = isr_handler
#pragma weak exti15_10_isr = isr_handler
#pragma weak rtc_alarm_isr = isr_handler
#pragma weak usb_wakeup_isr = isr_handler
#pragma weak tim8_brk_isr = isr_handler
#pragma weak tim8_up_isr = isr_handler
#pragma weak tim8_trg_com_isr = isr_handler
#pragma weak tim8_cc_isr = isr_handler
#pragma weak adc3_isr = isr_handler
#pragma weak fsmc_isr = isr_handler
#pragma weak sdio_isr = isr_handler
#pragma weak tim5_isr = isr_handler
#pragma weak spi3_isr = isr_handler
#pragma weak uart4_isr = isr_handler
#pragma weak uart5_isr = isr_handler
#pragma weak tim6_isr = isr_handler
#pragma weak tim7_isr = isr_handler
#pragma weak dma2_channel1_isr = isr_handler
#pragma weak dma2_channel2_isr = isr_handler
#pragma weak dma2_channel3_isr = isr_handler
#pragma weak dma2_channel4_5_isr = isr_handler
#pragma weak dma2_channel5_isr = isr_handler
#pragma weak eth_isr = isr_handler
#pragma weak eth_wkup_isr = isr_handler
#pragma weak can2_tx_isr = isr_handler
#pragma weak can2_rx0_isr = isr_handler
#pragma weak can2_rx1_isr = isr_handler
#pragma weak can2_sce_isr = isr_handler
#pragma weak otg_fs_isr = isr_handler

26
lib/interrupt.h

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/* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/** BusVoodoo runtime interrupt table
* @file
* @author King Kévin <kingkevin@cuvoodoo.info>
* @date 2018
*/
#pragma once
#include "libopencm3/cm3/nvic.h"
#include "libopencm3/cm3/vector.h"
/** table of interrupts which can set to user functions
* @note only interrupt using the default handler can be intercepted
*/
extern vector_table_entry_t interrupt_table[NVIC_IRQ_COUNT];
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