atmega2560.h File Reference

#include <util/delay_basic.h>

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Macros
#define	ZRTOS_ARCH__FOUND
#define	ZRTOS_ARCH__BYTE_ORDER   ZRTOS_ARCH__BYTE_ORDER_LITTLE_ENDIAN
#define	ZRTOS_ARCH__CPU_CLOCK_HZ   ( ( uint32_t ) F_CPU )
#define	ZRTOS_ARCH__BYTE_ALIGNMENT   (1)
#define	ZRTOS_ARCH__FATAL()   ((void(*)(void))0)();
#define	ZRTOS_ARCH__SET_STACK_PTR(ptr)   (SP = (uint16_t)(ptr))
#define	ZRTOS_ARCH__GET_STACK_PTR()   ((void*)SP)
#define	ZRTOS_ARCH__IS_INTERRUPTS_DISABLED()   ((SREG & 0x80) == 0)
#define	ZRTOS_ARCH__IS_INTERRUPTS_ENABLED()   ((SREG & 0x80) > 0)
#define	ZRTOS_ARCH__DISABLE_INTERRUPTS()   asm volatile ( "cli" :: );
#define	ZRTOS_ARCH__ENABLE_INTERRUPTS()   asm volatile ( "sei" :: );
#define	zrtos_arch__cpu_state_init   zrtos_arch__cpu_state_init_a
#define	ZRTOS_ARCH__GET_CPU_STATE_BUFFER_LENGTH()   33
#define	ZRTOS_ARCH__GET_FN_CALL_STACK_LENGTH()   20
#define	ZRTOS_ARCH__SAVE_CPU_STATE()
#define	ZRTOS_ARCH__SAVE_CPU_STATE_EX(ptr)
#define	ZRTOS_ARCH__LOAD_CPU_STATE()
#define	ZRTOS_ARCH__LOAD_CPU_STATE_EX(ptr)
#define	ZRTOS_ARCH__RETURN_FROM_INTERRUPT()   __asm__ __volatile__("reti");

Typedefs
typedef uint8_t	zrtos_arch_stack_t
typedef int8_t	zrtos_arch_stack_signed_t
typedef uint8_t	zrtos_arch_gpio_pin_t
typedef uint16_t	zrtos_arch_gpio_value_analog_t

Functions
zrtos_arch_stack_t *	zrtos_arch__cpu_state_init_helper (zrtos_arch_stack_t *pxTopOfStack, zrtos_arch_callback_t pxCode, void *pvParameters)
zrtos_arch_stack_t *	zrtos_arch__cpu_state_init_b (zrtos_arch_stack_t *thiz, zrtos_arch_callback_t callback, void *args)
zrtos_arch_stack_t *	zrtos_arch__cpu_state_init_a (zrtos_arch_stack_t *thiz, zrtos_arch_callback_t callback, void *args)
void	zrtos_arch__delay_microseconds (uint16_t us)
void	zrtos_arch__delay_milliseconds (uint16_t ms)

Macro Definition Documentation

ZRTOS_ARCH__BYTE_ALIGNMENT

#define ZRTOS_ARCH__BYTE_ALIGNMENT   (1)

Definition at line 28 of file atmega2560.h.

ZRTOS_ARCH__BYTE_ORDER

#define ZRTOS_ARCH__BYTE_ORDER   ZRTOS_ARCH__BYTE_ORDER_LITTLE_ENDIAN

Definition at line 24 of file atmega2560.h.

ZRTOS_ARCH__CPU_CLOCK_HZ

#define ZRTOS_ARCH__CPU_CLOCK_HZ   ( ( uint32_t ) F_CPU )

Definition at line 26 of file atmega2560.h.

zrtos_arch__cpu_state_init

#define zrtos_arch__cpu_state_init   zrtos_arch__cpu_state_init_a

Definition at line 187 of file atmega2560.h.

ZRTOS_ARCH__DISABLE_INTERRUPTS

#define ZRTOS_ARCH__DISABLE_INTERRUPTS

(

)

asm volatile ( "cli" :: );

Definition at line 44 of file atmega2560.h.

ZRTOS_ARCH__ENABLE_INTERRUPTS

#define ZRTOS_ARCH__ENABLE_INTERRUPTS

(

)

asm volatile ( "sei" :: );

Definition at line 47 of file atmega2560.h.

ZRTOS_ARCH__FATAL

#define ZRTOS_ARCH__FATAL

(

)

((void(*)(void))0)();

Definition at line 30 of file atmega2560.h.

ZRTOS_ARCH__FOUND

#define ZRTOS_ARCH__FOUND

Definition at line 15 of file atmega2560.h.

ZRTOS_ARCH__GET_CPU_STATE_BUFFER_LENGTH

#define ZRTOS_ARCH__GET_CPU_STATE_BUFFER_LENGTH

(

)

33

Definition at line 192 of file atmega2560.h.

ZRTOS_ARCH__GET_FN_CALL_STACK_LENGTH

#define ZRTOS_ARCH__GET_FN_CALL_STACK_LENGTH

(

)

20

Definition at line 193 of file atmega2560.h.

ZRTOS_ARCH__GET_STACK_PTR

#define ZRTOS_ARCH__GET_STACK_PTR

(

)

((void*)SP)

Definition at line 35 of file atmega2560.h.

ZRTOS_ARCH__IS_INTERRUPTS_DISABLED

#define ZRTOS_ARCH__IS_INTERRUPTS_DISABLED

(

)

((SREG & 0x80) == 0)

Definition at line 38 of file atmega2560.h.

ZRTOS_ARCH__IS_INTERRUPTS_ENABLED

#define ZRTOS_ARCH__IS_INTERRUPTS_ENABLED

(

)

((SREG & 0x80) > 0)

Definition at line 41 of file atmega2560.h.

ZRTOS_ARCH__LOAD_CPU_STATE

#define ZRTOS_ARCH__LOAD_CPU_STATE

(

)

Definition at line 245 of file atmega2560.h.

ZRTOS_ARCH__LOAD_CPU_STATE_EX

#define ZRTOS_ARCH__LOAD_CPU_STATE_EX

(

ptr

)

Value:

;__asm__ __volatile__(                                      \
        "lds    __tmp_reg__, %0                         \n\t"   \
        "out    __SP_L__, __tmp_reg__                   \n\t"   \
        "lds    __tmp_reg__, %0 + 1                     \n\t"   \
        "out    __SP_H__, __tmp_reg__                   \n\t"   \
        : : "m" (ptr)                                           \
    );                                                          \
    ZRTOS_ARCH__LOAD_CPU_STATE();

Definition at line 283 of file atmega2560.h.

ZRTOS_ARCH__RETURN_FROM_INTERRUPT

#define ZRTOS_ARCH__RETURN_FROM_INTERRUPT

(

)

__asm__ __volatile__("reti");

Definition at line 293 of file atmega2560.h.

ZRTOS_ARCH__SAVE_CPU_STATE

#define ZRTOS_ARCH__SAVE_CPU_STATE

(

)

Definition at line 195 of file atmega2560.h.

ZRTOS_ARCH__SAVE_CPU_STATE_EX

#define ZRTOS_ARCH__SAVE_CPU_STATE_EX

(

ptr

)

Value:

ZRTOS_ARCH__SAVE_CPU_STATE();                               \
    ;__asm__ __volatile__(                                      \
        "in     __tmp_reg__, __SP_L__                   \n\t"   \
        "sts    %0, __tmp_reg__                         \n\t"   \
        "in     __tmp_reg__, __SP_H__                   \n\t"   \
        "sts    %0 + 1, __tmp_reg__                     \n\t"   \
        : "=m" (ptr)                                            \
    );

Definition at line 235 of file atmega2560.h.

ZRTOS_ARCH__SET_STACK_PTR

#define ZRTOS_ARCH__SET_STACK_PTR

(

ptr

)

(SP = (uint16_t)(ptr))

Definition at line 32 of file atmega2560.h.

Typedef Documentation

zrtos_arch_gpio_pin_t

typedef uint8_t zrtos_arch_gpio_pin_t

Definition at line 21 of file atmega2560.h.

zrtos_arch_gpio_value_analog_t

typedef uint16_t zrtos_arch_gpio_value_analog_t

Definition at line 22 of file atmega2560.h.

zrtos_arch_stack_signed_t

typedef int8_t zrtos_arch_stack_signed_t

Definition at line 20 of file atmega2560.h.

zrtos_arch_stack_t

typedef uint8_t zrtos_arch_stack_t

Definition at line 19 of file atmega2560.h.

Function Documentation

zrtos_arch__cpu_state_init_a()

zrtos_arch_stack_t* zrtos_arch__cpu_state_init_a	(	zrtos_arch_stack_t *	thiz,
		zrtos_arch_callback_t	callback,
		void *	args
	)

Definition at line 152 of file atmega2560.h.

 {
    zrtos_arch_stack_t *pxTopOfStack = thiz;
    zrtos_arch_stack_t *pxTopOfStackTmp = pxTopOfStack;
    uint16_t usAddress = (uint16_t)callback;
    zrtos_arch_stack_signed_t usValue = 0;

    pxTopOfStack -= 3;

    for(;usValue < 32;){
        /*if(usValue == 0x0A
        || usValue == 0x1A
        || usValue == 0x2A){
            usValue+=6;
        }*/
        *pxTopOfStack-- = usValue++;
    }

    pxTopOfStackTmp[0] = usAddress & 0x00ff;
    pxTopOfStackTmp[-1] = (usAddress >> 8) & 0x00ff;
    pxTopOfStackTmp[-2] = 0;
    pxTopOfStackTmp[-3] = 0x80;//enable interrupts
    pxTopOfStackTmp[-4] = 0;
    usAddress = (uint16_t)args;
    pxTopOfStackTmp[-27] = usAddress & 0x00ff;
    pxTopOfStackTmp[-28] = (usAddress >> 8) & 0x00ff;

    return pxTopOfStack;
}

zrtos_arch__cpu_state_init_b()

zrtos_arch_stack_t* zrtos_arch__cpu_state_init_b	(	zrtos_arch_stack_t *	thiz,
		zrtos_arch_callback_t	callback,
		void *	args
	)

Definition at line 133 of file atmega2560.h.

 {
/*
    ZRTOS_DEBUG__CODE(
        static uint8_t pattern = 0xF0;
        memset(thiz,(int)(pattern++),length);
    );
*/
    return zrtos_arch__cpu_state_init_helper(
         thiz
        ,callback
        ,args
    );
}

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zrtos_arch__cpu_state_init_helper()

zrtos_arch_stack_t* zrtos_arch__cpu_state_init_helper	(	zrtos_arch_stack_t *	pxTopOfStack,
		zrtos_arch_callback_t	pxCode,
		void *	pvParameters
	)

Definition at line 51 of file atmega2560.h.

{
uint16_t usAddress;

    /* Simulate how the stack would look after a call to vPortYield() generated by
     * the compiler. */

    /* The start of the task code will be popped off the stack last, so place
     * it on first. */
    usAddress = ( uint16_t ) pxCode;
    *pxTopOfStack = ( zrtos_arch_stack_t ) ( usAddress & ( uint16_t ) 0x00ff );
    pxTopOfStack--;

    usAddress >>= 8;
    *pxTopOfStack = ( zrtos_arch_stack_t ) ( usAddress & ( uint16_t ) 0x00ff );
    pxTopOfStack--;

#if defined(__AVR_3_BYTE_PC__)

    /* The AVR ATmega2560/ATmega2561 have 256KBytes of program memory and a 17-bit
     * program counter. When a code address is stored on the stack, it takes 3 bytes
     * instead of 2 for the other ATmega* chips.
     *
     * Store 0 as the top byte since we force all task routines to the bottom 128K
     * of flash. We do this by using the .lowtext label in the linker script.
     *
     * In order to do this properly, we would need to get a full 3-byte pointer to
     * pxCode. That requires a change to GCC. Not likely to happen any time soon.
     */
    *pxTopOfStack = 0;
    pxTopOfStack--;
#endif

    /* Next simulate the stack as if after a call to portSAVE_CONTEXT().
     * portSAVE_CONTEXT places the flags on the stack immediately after r0
     * to ensure the interrupts get disabled as soon as possible, and so ensuring
     *  the stack use is minimal should a context switch interrupt occur. */
    *pxTopOfStack = ( zrtos_arch_stack_t ) 0x00; /* R0 */
    pxTopOfStack--;
    *pxTopOfStack = 0x80;//enable interrupts
    pxTopOfStack--;

#if defined(__AVR_3_BYTE_PC__)

    /* If we have an ATmega256x, we are also saving the EIND register.
     * We should default to 0.
     */
    *pxTopOfStack = ( zrtos_arch_stack_t ) 0x00;    /* EIND */
    pxTopOfStack--;
#endif

#if defined(__AVR_HAVE_RAMPZ__)

    /* We are saving the RAMPZ register.
     * We should default to 0.
     */
    *pxTopOfStack = ( zrtos_arch_stack_t ) 0x00;    /* RAMPZ */
    pxTopOfStack--;
#endif

    /* Now the remaining registers. The compiler expects R1 to be 0. */
    *pxTopOfStack = ( zrtos_arch_stack_t ) 0x00;    /* R1 */

    /* Leave R2 - R23 untouched */
    pxTopOfStack -= 23;

    /* Place the parameter on the stack in the expected location. */
    usAddress = ( uint16_t ) pvParameters;
    *pxTopOfStack = ( zrtos_arch_stack_t ) ( usAddress & ( uint16_t ) 0x00ff );
    pxTopOfStack--;

    usAddress >>= 8;
    *pxTopOfStack = ( zrtos_arch_stack_t ) ( usAddress & ( uint16_t ) 0x00ff );

    /* Leave register R26 - R31 untouched */
    pxTopOfStack -= 7;

    return pxTopOfStack;
}

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zrtos_arch__delay_microseconds()

void zrtos_arch__delay_microseconds

(

uint16_t

us

)

Definition at line 296 of file atmega2560.h.

                                                {
    _delay_loop_2((ZRTOS_ARCH__CPU_CLOCK_HZ/4000000) * us);
}

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zrtos_arch__delay_milliseconds()

void zrtos_arch__delay_milliseconds

(

uint16_t

ms

)

Definition at line 300 of file atmega2560.h.

                                                {
    while(ms--){
        zrtos_arch__delay_microseconds(1000);
    }
}

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