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usb-firewall-fork/Downstream/Src/interrupts.c

118 lines
4.1 KiB

/**
******************************************************************************
* @file stm32f4xx_it.c
* @brief Interrupt Service Routines.
******************************************************************************
*
* COPYRIGHT(c) 2015 STMicroelectronics
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. Neither the name of STMicroelectronics nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
******************************************************************************
*
* Modifications by Robert Fisk
*/
/* Includes ------------------------------------------------------------------*/
#include "stm32f4xx_hal.h"
#include "stm32f4xx.h"
#include "interrupts.h"
#include "led.h"
#include "board_config.h"
/* External variables --------------------------------------------------------*/
extern HCD_HandleTypeDef hhcd_USB_OTG_FS;
extern DMA_HandleTypeDef hdma_spi1_rx;
extern DMA_HandleTypeDef hdma_spi1_tx;
extern volatile uint8_t UsbInterruptHasHappened;
uint8_t BusFaultAllowed = 0;
/******************************************************************************/
/* Cortex-M4 Processor Interruption and Exception Handlers */
/******************************************************************************/
/**
* @brief This function handles System tick timer.
*/
void SysTick_Handler(void)
{
HAL_IncTick();
LED_Tick();
}
/******************************************************************************/
/* STM32F4xx Peripheral Interrupt Handlers */
/* Add here the Interrupt Handlers for the used peripherals. */
/* For the available peripheral interrupt handler names, */
/* please refer to the startup file (startup_stm32f4xx.s). */
/******************************************************************************/
void DMA2_Stream2_IRQHandler(void)
{
HAL_DMA_IRQHandler(&hdma_spi1_rx);
}
void DMA2_Stream3_IRQHandler(void)
{
HAL_DMA_IRQHandler(&hdma_spi1_tx);
}
void OTG_FS_IRQHandler(void)
{
HAL_HCD_IRQHandler(&hhcd_USB_OTG_FS);
UsbInterruptHasHappened = 1;
}
//This weird stuff is required when disabling flash writes.
//The deliberate flash lockout will cause a bus fault that we need to process.
void EnableOneBusFault(void)
{
//It should not be enabled already!
if (BusFaultAllowed)
{
while (1);
}
SCB->SHCSR = SCB_SHCSR_BUSFAULTENA_Msk;
BusFaultAllowed = 1;
}
void BusFault_Handler(void)
{
if (BusFaultAllowed)
{
BusFaultAllowed = 0;
return;
}
while (1);
}
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/