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/******************************************************************************
* @file: core_cm0.h
* @purpose: CMSIS Cortex-M0 Core Peripheral Access Layer Header File
* @version: V1.10
* @date: 24. Feb. 2009
*----------------------------------------------------------------------------
*
* Copyright (C) 2009 ARM Limited. All rights reserved.
*
* ARM Limited (ARM) is supplying this software for use with Cortex-Mx
* processor based microcontrollers. This file can be freely distributed
* within development tools that are supporting such ARM based processors.
*
* THIS SOFTWARE IS PROVIDED "AS IS". NO WARRANTIES, WHETHER EXPRESS, IMPLIED
* OR STATUTORY, INCLUDING, BUT NOT LIMITED TO, IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE APPLY TO THIS SOFTWARE.
* ARM SHALL NOT, IN ANY CIRCUMSTANCES, BE LIABLE FOR SPECIAL, INCIDENTAL, OR
* CONSEQUENTIAL DAMAGES, FOR ANY REASON WHATSOEVER.
*
******************************************************************************/
#ifndef __CM0_CORE_H__
#define __CM0_CORE_H__
#define __CM0_CMSIS_VERSION_MAIN (0x01) /*!< [31:16] CMSIS HAL main version */
#define __CM0_CMSIS_VERSION_SUB (0x10) /*!< [15:0] CMSIS HAL sub version */
#define __CM0_CMSIS_VERSION ((__CM0_CMSIS_VERSION_MAIN << 16) | __CM0_CMSIS_VERSION_SUB) /*!< CMSIS HAL version number */
#define __CORTEX_M (0x00) /*!< Cortex core */
#include <stdint.h> /* Include standard types */
#if defined (__ICCARM__)
#include <intrinsics.h> /* IAR Intrinsics */
#endif
#ifndef __NVIC_PRIO_BITS
#define __NVIC_PRIO_BITS 2 /*!< standard definition for NVIC Priority Bits */
#endif
/**
* IO definitions
*
* define access restrictions to peripheral registers
*/
#define __I volatile const /*!< defines 'read only' permissions */
#define __O volatile /*!< defines 'write only' permissions */
#define __IO volatile /*!< defines 'read / write' permissions */
/*******************************************************************************
* Register Abstraction
******************************************************************************/
/* System Reset */
#define NVIC_VECTRESET 0 /*!< Vector Reset Bit */
#define NVIC_SYSRESETREQ 2 /*!< System Reset Request */
#define NVIC_AIRCR_VECTKEY (0x5FA << 16) /*!< AIRCR Key for write access */
#define NVIC_AIRCR_ENDIANESS 15 /*!< Endianess */
/* memory mapping struct for Nested Vectored Interrupt Controller (NVIC) */
typedef struct
{
__IO uint32_t ISER[1]; /*!< Interrupt Set Enable Register */
uint32_t RESERVED0[31];
__IO uint32_t ICER[1]; /*!< Interrupt Clear Enable Register */
uint32_t RSERVED1[31];
__IO uint32_t ISPR[1]; /*!< Interrupt Set Pending Register */
uint32_t RESERVED2[31];
__IO uint32_t ICPR[1]; /*!< Interrupt Clear Pending Register */
uint32_t RESERVED3[31];
uint32_t RESERVED4[64];
__IO uint32_t IP[8]; /*!< Interrupt Priority Register */
} NVIC_Type;
/* memory mapping struct for System Control Block */
typedef struct
{
__I uint32_t CPUID; /*!< CPU ID Base Register */
__IO uint32_t ICSR; /*!< Interrupt Control State Register */
uint32_t RESERVED0;
__IO uint32_t AIRCR; /*!< Application Interrupt / Reset Control Register */
__IO uint32_t SCR; /*!< System Control Register */
__IO uint32_t CCR; /*!< Configuration Control Register */
uint32_t RESERVED1;
__IO uint32_t SHP[2]; /*!< System Handlers Priority Registers. [0] is RESERVED */
__IO uint32_t SHCSR; /*!< System Handler Control and State Register */
uint32_t RESERVED2[2];
__IO uint32_t DFSR; /*!< Debug Fault Status Register */
} SCB_Type;
/* memory mapping struct for SysTick */
typedef struct
{
__IO uint32_t CTRL; /*!< SysTick Control and Status Register */
__IO uint32_t LOAD; /*!< SysTick Reload Value Register */
__IO uint32_t VAL; /*!< SysTick Current Value Register */
__I uint32_t CALIB; /*!< SysTick Calibration Register */
} SysTick_Type;
/* Core Debug Register */
typedef struct
{
__IO uint32_t DHCSR; /*!< Debug Halting Control and Status Register */
__O uint32_t DCRSR; /*!< Debug Core Register Selector Register */
__IO uint32_t DCRDR; /*!< Debug Core Register Data Register */
__IO uint32_t DEMCR; /*!< Debug Exception and Monitor Control Register */
} CoreDebug_Type;
/* Memory mapping of Cortex-M0 Hardware */
#define SCS_BASE (0xE000E000) /*!< System Control Space Base Address */
#define CoreDebug_BASE (0xE000EDF0) /*!< Core Debug Base Address */
#define SysTick_BASE (SCS_BASE + 0x0010) /*!< SysTick Base Address */
#define NVIC_BASE (SCS_BASE + 0x0100) /*!< NVIC Base Address */
#define SCB_BASE (SCS_BASE + 0x0D00) /*!< System Control Block Base Address */
#define SCB ((SCB_Type *) SCB_BASE) /*!< SCB configuration struct */
#define SysTick ((SysTick_Type *) SysTick_BASE) /*!< SysTick configuration struct */
#define NVIC ((NVIC_Type *) NVIC_BASE) /*!< NVIC configuration struct */
#define CoreDebug ((CoreDebug_Type *) CoreDebug_BASE) /*!< Core Debug configuration struct */
/*******************************************************************************
* Hardware Abstraction Layer
******************************************************************************/
#if defined ( __CC_ARM )
#define __ASM __asm /*!< asm keyword for ARM Compiler */
#define __INLINE __inline /*!< inline keyword for ARM Compiler */
#elif defined ( __ICCARM__ )
#define __ASM __asm /*!< asm keyword for IAR Compiler */
#define __INLINE inline /*!< inline keyword for IAR Compiler. Only avaiable in High optimization mode! */
#define __NOP __no_operation /*!< no operation intrinsic in IAR Compiler */
#elif defined ( __GNUC__ )
#define __ASM asm /*!< asm keyword for GNU Compiler */
#define __INLINE inline /*!< inline keyword for GNU Compiler */
#endif
/* ################### Compiler specific Intrinsics ########################### */
#if defined ( __CC_ARM ) /*------------------RealView Compiler -----------------*/
/* ARM armcc specific functions */
#define __enable_fault_irq __enable_fiq
#define __disable_fault_irq __disable_fiq
#define __NOP __nop
#define __WFI __wfi
#define __WFE __wfe
#define __SEV __sev
#define __ISB() __isb(0)
#define __DSB() __dsb(0)
#define __DMB() __dmb(0)
#define __REV __rev
/* intrinsic void __enable_irq(); */
/* intrinsic void __disable_irq(); */
/**
* @brief Return the Process Stack Pointer
*
* @param none
* @return uint32_t ProcessStackPointer
*
* Return the actual process stack pointer
*/
extern uint32_t __get_PSP(void);
/**
* @brief Set the Process Stack Pointer
*
* @param uint32_t Process Stack Pointer
* @return none
*
* Assign the value ProcessStackPointer to the MSP
* (process stack pointer) Cortex processor register
*/
extern void __set_PSP(uint32_t topOfProcStack);
/**
* @brief Return the Main Stack Pointer
*
* @param none
* @return uint32_t Main Stack Pointer
*
* Return the current value of the MSP (main stack pointer)
* Cortex processor register
*/
extern uint32_t __get_MSP(void);
/**
* @brief Set the Main Stack Pointer
*
* @param uint32_t Main Stack Pointer
* @return none
*
* Assign the value mainStackPointer to the MSP
* (main stack pointer) Cortex processor register
*/
extern void __set_MSP(uint32_t topOfMainStack);
/**
* @brief Reverse byte order in unsigned short value
*
* @param uint16_t value to reverse
* @return uint32_t reversed value
*
* Reverse byte order in unsigned short value
*/
extern uint32_t __REV16(uint16_t value);
/*
* @brief Reverse byte order in signed short value with sign extension to integer
*
* @param int16_t value to reverse
* @return int32_t reversed value
*
* Reverse byte order in signed short value with sign extension to integer
*/
extern int32_t __REVSH(int16_t value);
#if (__ARMCC_VERSION < 400000)
/**
* @brief Return the Priority Mask value
*
* @param none
* @return uint32_t PriMask
*
* Return the state of the priority mask bit from the priority mask
* register
*/
extern uint32_t __get_PRIMASK(void);
/**
* @brief Set the Priority Mask value
*
* @param uint32_t PriMask
* @return none
*
* Set the priority mask bit in the priority mask register
*/
extern void __set_PRIMASK(uint32_t priMask);
/**
* @brief Return the Control Register value
*
* @param none
* @return uint32_t Control value
*
* Return the content of the control register
*/
extern uint32_t __get_CONTROL(void);
/**
* @brief Set the Control Register value
*
* @param uint32_t Control value
* @return none
*
* Set the control register
*/
extern void __set_CONTROL(uint32_t control);
#else /* (__ARMCC_VERSION >= 400000) */
/**
* @brief Return the Priority Mask value
*
* @param none
* @return uint32_t PriMask
*
* Return the state of the priority mask bit from the priority mask
* register
*/
static __INLINE uint32_t __get_PRIMASK(void)
{
register uint32_t __regPriMask __ASM("primask");
return(__regPriMask);
}
/**
* @brief Set the Priority Mask value
*
* @param uint32_t PriMask
* @return none
*
* Set the priority mask bit in the priority mask register
*/
static __INLINE void __set_PRIMASK(uint32_t priMask)
{
register uint32_t __regPriMask __ASM("primask");
__regPriMask = (priMask);
}
/**
* @brief Return the Control Register value
*
* @param none
* @return uint32_t Control value
*
* Return the content of the control register
*/
static __INLINE uint32_t __get_CONTROL(void)
{
register uint32_t __regControl __ASM("control");
return(__regControl);
}
/**
* @brief Set the Control Register value
*
* @param uint32_t Control value
* @return none
*
* Set the control register
*/
static __INLINE void __set_CONTROL(uint32_t control)
{
register uint32_t __regControl __ASM("control");
__regControl = control;
}
#endif /* __ARMCC_VERSION */
#elif (defined (__ICCARM__)) /*------------------ ICC Compiler -------------------*/
/* IAR iccarm specific functions */
#define __enable_irq __enable_interrupt /*!< global Interrupt enable */
#define __disable_irq __disable_interrupt /*!< global Interrupt disable */
static __INLINE void __enable_fault_irq() { __ASM ("cpsie f"); }
static __INLINE void __disable_fault_irq() { __ASM ("cpsid f"); }
static __INLINE void __WFI() { __ASM ("wfi"); }
static __INLINE void __WFE() { __ASM ("wfe"); }
static __INLINE void __SEV() { __ASM ("sev"); }
//static __INLINE void __ISB(arg) { __ASM ("isb"); }
//static __INLINE void __DSB(arg) { __ASM ("dsb"); }
//static __INLINE void __DMB(arg) { __ASM ("dmb"); }
/**
* @brief Return the Process Stack Pointer
*
* @param none
* @return uint32_t ProcessStackPointer
*
* Return the actual process stack pointer
*/
extern uint32_t __get_PSP(void);
/**
* @brief Set the Process Stack Pointer
*
* @param uint32_t Process Stack Pointer
* @return none
*
* Assign the value ProcessStackPointer to the MSP
* (process stack pointer) Cortex processor register
*/
extern void __set_PSP(uint32_t topOfProcStack);
/**
* @brief Return the Main Stack Pointer
*
* @param none
* @return uint32_t Main Stack Pointer
*
* Return the current value of the MSP (main stack pointer)
* Cortex processor register
*/
extern uint32_t __get_MSP(void);
/**
* @brief Set the Main Stack Pointer
*
* @param uint32_t Main Stack Pointer
* @return none
*
* Assign the value mainStackPointer to the MSP
* (main stack pointer) Cortex processor register
*/
extern void __set_MSP(uint32_t topOfMainStack);
/**
* @brief Reverse byte order in unsigned short value
*
* @param uint16_t value to reverse
* @return uint32_t reversed value
*
* Reverse byte order in unsigned short value
*/
extern uint32_t __REV16(uint16_t value);
/* intrinsic void __set_PRIMASK(); */
/* intrinsic void __get_PRIMASK(); */
/* intrinsic uint32_t __REV(uint32_t value); */
/* intrinsic uint32_t __REVSH(uint32_t value); */
#elif (defined (__GNUC__)) /*------------------ GNU Compiler ---------------------*/
/* GNU gcc specific functions */
static __INLINE void __NOP() { __ASM volatile ("nop"); }
static __INLINE void __enable_irq() { __ASM volatile ("cpsie i"); }
static __INLINE void __disable_irq() { __ASM volatile ("cpsid i"); }
static __INLINE void __enable_fault_irq() { __ASM volatile ("cpsie f"); }
static __INLINE void __disable_fault_irq() { __ASM volatile ("cpsid f"); }
static __INLINE void __WFI() { __ASM volatile ("wfi"); }
static __INLINE void __WFE() { __ASM volatile ("wfe"); }
static __INLINE void __SEV() { __ASM volatile ("sev"); }
static __INLINE void __ISB(arg) { __ASM volatile ("isb"); }
static __INLINE void __DSB(arg) { __ASM volatile ("dsb"); }
static __INLINE void __DMB(arg) { __ASM volatile ("dmb"); }
/**
* @brief Return the Process Stack Pointer
*
* @param none
* @return uint32_t ProcessStackPointer
*
* Return the actual process stack pointer
*/
extern uint32_t __get_PSP(void);
/**
* @brief Set the Process Stack Pointer
*
* @param uint32_t Process Stack Pointer
* @return none
*
* Assign the value ProcessStackPointer to the MSP
* (process stack pointer) Cortex processor register
*/
extern void __set_PSP(uint32_t topOfProcStack);
/**
* @brief Return the Main Stack Pointer
*
* @param none
* @return uint32_t Main Stack Pointer
*
* Return the current value of the MSP (main stack pointer)
* Cortex processor register
*/
extern uint32_t __get_MSP(void);
/**
* @brief Set the Main Stack Pointer
*
* @param uint32_t Main Stack Pointer
* @return none
*
* Assign the value mainStackPointer to the MSP
* (main stack pointer) Cortex processor register
*/
extern void __set_MSP(uint32_t topOfMainStack);
/**
* @brief Return the Priority Mask value
*
* @param none
* @return uint32_t PriMask
*
* Return the state of the priority mask bit from the priority mask
* register
*/
extern uint32_t __get_PRIMASK(void);
/**
* @brief Set the Priority Mask value
*
* @param uint32_t PriMask
* @return none
*
* Set the priority mask bit in the priority mask register
*/
extern void __set_PRIMASK(uint32_t priMask);
/**
* @brief Return the Control Register value
*
* @param none
* @return uint32_t Control value
*
* Return the content of the control register
*/
extern uint32_t __get_CONTROL(void);
/**
* @brief Set the Control Register value
*
* @param uint32_t Control value
* @return none
*
* Set the control register
*/
extern void __set_CONTROL(uint32_t control);
/**
* @brief Reverse byte order in integer value
*
* @param uint32_t value to reverse
* @return uint32_t reversed value
*
* Reverse byte order in integer value
*/
extern uint32_t __REV(uint32_t value);
/**
* @brief Reverse byte order in unsigned short value
*
* @param uint16_t value to reverse
* @return uint32_t reversed value
*
* Reverse byte order in unsigned short value
*/
extern uint32_t __REV16(uint16_t value);
/*
* Reverse byte order in signed short value with sign extension to integer
*
* @param int16_t value to reverse
* @return int32_t reversed value
*
* @brief Reverse byte order in signed short value with sign extension to integer
*/
extern int32_t __REVSH(int16_t value);
#endif
/* ########################## NVIC functions #################################### */
/* Interrupt Priorities are WORD accessible only under ARMv6M */
/* The following MACROS handle generation of the register offset and byte masks */
#define _BIT_SHIFT(IRQn) ( (((uint32_t)(IRQn) ) & 0x03) * 8 )
#define _SHP_IDX(IRQn) ( ((((uint32_t)(IRQn) & 0x0F)-8) >> 2) )
#define _IP_IDX(IRQn) ( ((uint32_t)(IRQn) >> 2) )
/**
* @brief Set the Priority Grouping in NVIC Interrupt Controller
*
* @param uint32_t priority_grouping is priority grouping field
* @return
*
* Set the priority grouping field using the required unlock sequence.
* The parameter priority_grouping is assigned to the field
* SCB->AIRCR [10:8] PRIGROUP field.
*/
static __INLINE void NVIC_SetPriorityGrouping(uint32_t priority_grouping)
{
uint32_t reg_value=0;
reg_value = SCB->AIRCR; /* read old register configuration */
reg_value &= ~((0xFFFFU << 16) | (0x0F << 8)); /* clear bits to change */
reg_value = ((reg_value | NVIC_AIRCR_VECTKEY | (priority_grouping << 8))); /* Insert write key and priorty group */
SCB->AIRCR = reg_value;
}
/**
* @brief Enable Interrupt in NVIC Interrupt Controller
*
* @param IRQn_Type IRQn specifies the interrupt number
* @return none
*
* Enable a device specific interupt in the NVIC interrupt controller.
* The interrupt number cannot be a negative value.
*/
static __INLINE void NVIC_EnableIRQ(IRQn_Type IRQn)
{
NVIC->ISER[((uint32_t)(IRQn) >> 5)] = (1 << ((uint32_t)(IRQn) & 0x1F)); /* enable interrupt */
}
/**
* @brief Disable the interrupt line for external interrupt specified
*
* @param IRQn_Type IRQn is the positive number of the external interrupt
* @return none
*
* Disable a device specific interupt in the NVIC interrupt controller.
* The interrupt number cannot be a negative value.
*/
static __INLINE void NVIC_DisableIRQ(IRQn_Type IRQn)
{
NVIC->ICER[((uint32_t)(IRQn) >> 5)] = (1 << ((uint32_t)(IRQn) & 0x1F)); /* disable interrupt */
}
/**
* @brief Read the interrupt pending bit for a device specific interrupt source
*
* @param IRQn_Type IRQn is the number of the device specifc interrupt
* @return IRQn_Type Number of pending interrupt or zero
*
* Read the pending register in NVIC and return the number of the
* specified interrupt if its status is pending, otherwise it returns
* zero. The interrupt number cannot be a negative value.
*/
static __INLINE IRQn_Type NVIC_GetPendingIRQ(IRQn_Type IRQn)
{
return((IRQn_Type) (NVIC->ISPR[(uint32_t)(IRQn) >> 5] & (1 << ((uint32_t)(IRQn) & 0x1F)))); /* Return Interrupt bit or 'zero' */
}
/**
* @brief Set the pending bit for an external interrupt
*
* @param IRQn_Type IRQn is the Number of the interrupt
* @return none
*
* Set the pending bit for the specified interrupt.
* The interrupt number cannot be a negative value.
*/
static __INLINE void NVIC_SetPendingIRQ(IRQn_Type IRQn)
{
NVIC->ISPR[((uint32_t)(IRQn) >> 5)] = (1 << ((uint32_t)(IRQn) & 0x1F)); /* set interrupt pending */
}
/**
* @brief Clear the pending bit for an external interrupt
*
* @param IRQn_Type IRQn is the Number of the interrupt
* @return none
*
* Clear the pending bit for the specified interrupt.
* The interrupt number cannot be a negative value.
*/
static __INLINE void NVIC_ClearPendingIRQ(IRQn_Type IRQn)
{
NVIC->ICPR[((uint32_t)(IRQn) >> 5)] = (1 << ((uint32_t)(IRQn) & 0x1F)); /* Clear pending interrupt */
}
/**
* @brief Set the priority for an interrupt
*
* @param IRQn_Type IRQn is the Number of the interrupt
* @param priority is the priority for the interrupt
* @return none
*
* Set the priority for the specified interrupt. The interrupt
* number can be positive to specify an external (device specific)
* interrupt, or negative to specify an internal (core) interrupt. \n
*
* Note: The priority cannot be set for every core interrupt.
*/
static __INLINE void NVIC_SetPriority(IRQn_Type IRQn, int32_t priority)
{
if(IRQn < 0) {
SCB->SHP[_SHP_IDX(IRQn)] = (SCB->SHP[_SHP_IDX(IRQn)] & ~(0xFF << _BIT_SHIFT(IRQn))) |
(((priority << (8 - __NVIC_PRIO_BITS)) & 0xFF) << _BIT_SHIFT(IRQn)); }
else {
NVIC->IP[_IP_IDX(IRQn)] = (NVIC->IP[_IP_IDX(IRQn)] & ~(0xFF << _BIT_SHIFT(IRQn))) |
(((priority << (8 - __NVIC_PRIO_BITS)) & 0xFF) << _BIT_SHIFT(IRQn)); }
}
/**
* @brief Read the priority for an interrupt
*
* @param IRQn_Type IRQn is the Number of the interrupt
* @return priority is the priority for the interrupt
*
* Read the priority for the specified interrupt. The interrupt
* number can be positive to specify an external (device specific)
* interrupt, or negative to specify an internal (core) interrupt.
*
* The returned priority value is automatically aligned to the implemented
* priority bits of the microcontroller.
*
* Note: The priority cannot be set for every core interrupt.
*/
static __INLINE uint32_t NVIC_GetPriority(IRQn_Type IRQn)
{
if(IRQn < 0) {
return((uint32_t)((SCB->SHP[_SHP_IDX(IRQn)] >> _BIT_SHIFT(IRQn) ) >> (8 - __NVIC_PRIO_BITS))); } /* get priority for Cortex-M0 system interrupts */
else {
return((uint32_t)((NVIC->IP[_IP_IDX(IRQn)] >> _BIT_SHIFT(IRQn) ) >> (8 - __NVIC_PRIO_BITS))); } /* get priority for device specific interrupts */
}
/* ################################## SysTick function ############################################ */
#if (!defined (__Vendor_SysTickConfig)) || (__Vendor_SysTickConfig == 0)
/* SysTick constants */
#define SYSTICK_ENABLE 0 /* Config-Bit to start or stop the SysTick Timer */
#define SYSTICK_TICKINT 1 /* Config-Bit to enable or disable the SysTick interrupt */
#define SYSTICK_CLKSOURCE 2 /* Clocksource has the offset 2 in SysTick Control and Status Register */
#define SYSTICK_MAXCOUNT ((1<<24) -1) /* SysTick MaxCount */
/**
* @brief Initialize and start the SysTick counter and its interrupt.
*
* @param uint32_t ticks is the number of ticks between two interrupts
* @return none
*
* Initialise the system tick timer and its interrupt and start the
* system tick timer / counter in free running mode to generate
* periodical interrupts.
*/
static __INLINE uint32_t SysTick_Config(uint32_t ticks)
{
if (ticks > SYSTICK_MAXCOUNT) return (1); /* Reload value impossible */
SysTick->LOAD = (ticks & SYSTICK_MAXCOUNT) - 1; /* set reload register */
NVIC_SetPriority (SysTick_IRQn, (1<<__NVIC_PRIO_BITS) - 1); /* set Priority for Cortex-M0 System Interrupts */
SysTick->VAL = (0x00); /* Load the SysTick Counter Value */
SysTick->CTRL = (1 << SYSTICK_CLKSOURCE) | (1<<SYSTICK_ENABLE) | (1<<SYSTICK_TICKINT); /* Enable SysTick IRQ and SysTick Timer */
return (0); /* Function successful */
}
#endif
/* ################################## Reset function ############################################ */
/**
* @brief Initiate a system reset request.
*
* @param none
* @return none
*
* Initialize a system reset request to reset the MCU
*/
static __INLINE void NVIC_SystemReset(void)
{
SCB->AIRCR = (NVIC_AIRCR_VECTKEY | (1<<NVIC_SYSRESETREQ)); /* Keep priority group unchanged */
}
#endif
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