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/******************************************************************************
* The MIT License
*
* Copyright (c) 2010 Perry Hung.
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use, copy,
* modify, merge, publish, distribute, sublicense, and/or sell copies
* of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*****************************************************************************/
/**
* @file nvic.h
* @brief Nested vector interrupt controller support.
*
* Basic usage:
*
* @code
* // Initialise the interrupt controller and point to the vector
* // table at the start of flash.
* nvic_init(0x08000000, 0);
* // Bind in a timer interrupt handler
* timer_attach_interrupt(TIMER_CC1_INTERRUPT, handler);
* // Optionally set the priority
* nvic_irq_set_priority(NVIC_TIMER1_CC, 5);
* // All done, enable all interrupts
* nvic_globalirq_enable();
* @endcode
*/
#ifndef _NVIC_H_
#define _NVIC_H_
#include "libmaple_types.h"
#include "util.h"
#ifdef __cplusplus
extern "C"{
#endif
/** NVIC register map type. */
typedef struct nvic_reg_map {
__io uint32 ISER[8]; /**< Interrupt Set Enable Registers */
uint32 RESERVED0[24]; /**< Reserved */
__io uint32 ICER[8]; /**< Interrupt Clear Enable Registers */
uint32 RSERVED1[24]; /**< Reserved */
__io uint32 ISPR[8]; /**< Interrupt Set Pending Registers */
uint32 RESERVED2[24]; /**< Reserved */
__io uint32 ICPR[8]; /**< Interrupt Clear Pending Registers */
uint32 RESERVED3[24]; /**< Reserved */
__io uint32 IABR[8]; /**< Interrupt Active bit Registers */
uint32 RESERVED4[56]; /**< Reserved */
__io uint8 IP[240]; /**< Interrupt Priority Registers */
uint32 RESERVED5[644]; /**< Reserved */
__io uint32 STIR; /**< Software Trigger Interrupt Registers */
} nvic_reg_map;
/** NVIC register map base pointer. */
#define NVIC_BASE ((struct nvic_reg_map*)0xE000E100)
/**
* @brief Interrupt vector table interrupt numbers.
*
* Each positive-valued enumerator is the position of the
* corresponding interrupt in the vector table. Negative-valued
* enumerators correspond to interrupts controlled by the system
* handler block.
*
* @see scb.h
*/
typedef enum nvic_irq_num {
NVIC_NMI = -14, /**< Non-maskable interrupt */
NVIC_HARDFAULT = -13, /**< Hard fault (all class of fault) */
NVIC_MEM_MANAGE = -12, /**< Memory management */
NVIC_BUS_FAULT = -11, /**< Bus fault: prefetch fault, memory
access fault. */
NVIC_USAGE_FAULT = -10, /**< Usage fault: Undefined instruction or
illegal state. */
NVIC_SVC = -5, /**< System service call via SWI insruction */
NVIC_DEBUG_MON = -4, /**< Debug monitor */
NVIC_PEND_SVC = -2, /**< Pendable request for system service */
NVIC_SYSTICK = -1, /**< System tick timer */
NVIC_WWDG = 0, /**< Window watchdog interrupt */
NVIC_PVD = 1, /**< PVD through EXTI line detection */
NVIC_TAMPER = 2, /**< Tamper */
NVIC_RTC = 3, /**< Real-time clock */
NVIC_FLASH = 4, /**< Flash */
NVIC_RCC = 5, /**< Reset and clock control */
NVIC_EXTI0 = 6, /**< EXTI line 0 */
NVIC_EXTI1 = 7, /**< EXTI line 1 */
NVIC_EXTI2 = 8, /**< EXTI line 2 */
NVIC_EXTI3 = 9, /**< EXTI line 3 */
NVIC_EXTI4 = 10, /**< EXTI line 4 */
NVIC_DMA_CH1 = 11, /**< DMA1 channel 1 */
NVIC_DMA_CH2 = 12, /**< DMA1 channel 2 */
NVIC_DMA_CH3 = 13, /**< DMA1 channel 3 */
NVIC_DMA_CH4 = 14, /**< DMA1 channel 4 */
NVIC_DMA_CH5 = 15, /**< DMA1 channel 5 */
NVIC_DMA_CH6 = 16, /**< DMA1 channel 6 */
NVIC_DMA_CH7 = 17, /**< DMA1 channel 7 */
NVIC_ADC_1_2 = 18, /**< ADC1 and ADC2 */
NVIC_USB_HP_CAN_TX = 19, /**< USB high priority or CAN TX */
NVIC_USB_LP_CAN_RX0 = 20, /**< USB low priority or CAN RX0 */
NVIC_CAN_RX1 = 21, /**< CAN RX1 */
NVIC_CAN_SCE = 22, /**< CAN SCE */
NVIC_EXTI_9_5 = 23, /**< EXTI line [9:5] */
NVIC_TIMER1_BRK = 24, /**< Timer 1 break */
NVIC_TIMER1_UP = 25, /**< Timer 1 update */
NVIC_TIMER1_TRG_COM = 26, /**< Timer 1 trigger and commutation */
NVIC_TIMER1_CC = 27, /**< Timer 1 capture/compare */
NVIC_TIMER2 = 28, /**< Timer 2 */
NVIC_TIMER3 = 29, /**< Timer 3 */
NVIC_TIMER4 = 30, /**< Timer 4 */
NVIC_I2C1_EV = 31, /**< I2C1 event */
NVIC_I2C1_ER = 32, /**< I2C1 error */
NVIC_I2C2_EV = 33, /**< I2C2 event */
NVIC_I2C2_ER = 34, /**< I2C2 error */
NVIC_SPI1 = 35, /**< SPI1 */
NVIC_SPI2 = 36, /**< SPI2 */
NVIC_USART1 = 37, /**< USART1 */
NVIC_USART2 = 38, /**< USART2 */
NVIC_USART3 = 39, /**< USART3 */
NVIC_EXTI_15_10 = 40, /**< EXTI line [15:10] */
NVIC_RTCALARM = 41, /**< RTC alarm through EXTI line */
NVIC_USBWAKEUP = 42, /**< USB wakeup from suspend through
EXTI line */
NVIC_TIMER8_BRK = 43, /**< Timer 8 break */
NVIC_TIMER8_UP = 44, /**< Timer 8 update */
NVIC_TIMER8_TRG_COM = 45, /**< Timer 8 trigger and commutation */
NVIC_TIMER8_CC = 46, /**< Timer 8 capture/compare */
#ifdef STM32_HIGH_DENSITY
NVIC_ADC3 = 47, /**< ADC3 */
NVIC_FSMC = 48, /**< FSMC */
NVIC_SDIO = 49, /**< SDIO */
NVIC_TIMER5 = 50, /**< Timer 5 */
NVIC_SPI3 = 51, /**< SPI3 */
NVIC_UART4 = 52, /**< UART4 */
NVIC_UART5 = 53, /**< UART5 */
NVIC_TIMER6 = 54, /**< Timer 6 */
NVIC_TIMER7 = 55, /**< Timer 7 */
NVIC_DMA2_CH1 = 56, /**< DMA2 channel 1 */
NVIC_DMA2_CH2 = 57, /**< DMA2 channel 2 */
NVIC_DMA2_CH3 = 58, /**< DMA2 channel 3 */
NVIC_DMA2_CH_4_5 = 59, /**< DMA2 channels 4 and 5 */
#endif
} nvic_irq_num;
/*
* Initialises the interrupt controller and sets all interrupts to the
* lowest priority.
*
* For stand-alone products, the base address is normally the start of
* flash (0x08000000).
*
* @param vector_table_address base address of the vector table
*/
void nvic_init(uint32 vector_table_address, uint32 offset);
/**
* Sets the base address of the vector table.
*/
void nvic_set_vector_table(uint32 address, uint32 offset);
void nvic_irq_set_priority(nvic_irq_num irqn, uint8 priority);
void nvic_sys_reset();
/**
* Enables interrupts and configurable fault handlers (clear PRIMASK).
*/
static inline void nvic_globalirq_enable() {
asm volatile("cpsie i");
}
/**
* Disable interrupts and configurable fault handlers (set PRIMASK).
*/
static inline void nvic_globalirq_disable() {
asm volatile("cpsid i");
}
/**
* @brief Enable interrupt irq_num
* @param irq_num Interrupt to enable
*/
static inline void nvic_irq_enable(nvic_irq_num irq_num) {
if (irq_num < 0) {
return;
}
NVIC_BASE->ISER[irq_num / 32] = BIT(irq_num % 32);
}
/**
* @brief Disable interrupt irq_num
* @param irq_num Interrupt to disable
*/
static inline void nvic_irq_disable(nvic_irq_num irq_num) {
if (irq_num < 0) {
return;
}
NVIC_BASE->ICER[irq_num / 32] = BIT(irq_num % 32);
}
/**
* @brief Quickly disable all interrupts.
*
* Calling this function is significantly faster than calling
* nvic_irq_disable() in a loop.
*/
static inline void nvic_irq_disable_all(void) {
/* Note: This only works up to XL density. The fix for
* connectivity line is:
*
* NVIC_BASE->ICER[2] = 0xF;
*
* We don't support connectivity line devices (yet), so leave it
* alone for now.
*/
NVIC_BASE->ICER[0] = 0xFFFFFFFF;
NVIC_BASE->ICER[1] = 0xFFFFFFFF;
}
#ifdef __cplusplus
}
#endif
#endif
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