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More GOS arduino files - oops missed them last commit.

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inmarket 2015-04-07 23:22:04 +10:00
parent 82cb03947c
commit 9c7dbd8d7e
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539
src/gos/gos_arduino.c Normal file
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/*
* This file is subject to the terms of the GFX License. If a copy of
* the license was not distributed with this file, you can obtain one at:
*
* http://ugfx.org/license.html
*/
#include "gfx.h"
#if GFX_USE_OS_ARDUINO
#include <string.h> // Prototype for memcpy()
static void _gosThreadsInit(void);
/*********************************************************
* Initialise
*********************************************************/
void _gosInit(void)
{
/* No initialization of the operating system itself is needed as there isn't one.
* On the other hand the C runtime should still already be initialized before
* getting here!
*/
#warning "GOS: Arduino - Make sure you initialize your hardware and the C runtime before calling gfxInit() in your application!"
// Start the scheduler
_gosThreadsInit();
}
void _gosDeinit(void)
{
/* ToDo */
}
/*********************************************************
* Exit everything functions
*********************************************************/
void gfxHalt(const char *msg) {
volatile uint32_t dummy;
(void) msg;
while(1)
dummy++;
}
void gfxExit(void) {
volatile uint32_t dummy;
while(1)
dummy++;
}
/*********************************************************
* Head allocation functions
*********************************************************/
#include <stdlib.h> // Prototype for malloc(), realloc() and free()
void *gfxAlloc(size_t sz) {
return malloc(sz);
}
void *gfxRealloc(void *ptr, size_t oldsz, size_t newsz) {
(void) oldsz;
return realloc(ptr, newsz);
}
void gfxFree(void *ptr) {
free(ptr);
}
/*********************************************************
* Semaphores and critical region functions
*********************************************************/
#if !defined(INTERRUPTS_OFF) || !defined(INTERRUPTS_ON)
#define INTERRUPTS_OFF()
#define INTERRUPTS_ON()
#endif
void gfxSystemLock(void) {
INTERRUPTS_OFF();
}
void gfxSystemUnlock(void) {
INTERRUPTS_ON();
}
void gfxMutexInit(gfxMutex *pmutex) {
pmutex[0] = 0;
}
void gfxMutexEnter(gfxMutex *pmutex) {
INTERRUPTS_OFF();
while (pmutex[0]) {
INTERRUPTS_ON();
gfxYield();
INTERRUPTS_OFF();
}
pmutex[0] = 1;
INTERRUPTS_ON();
}
void gfxMutexExit(gfxMutex *pmutex) {
pmutex[0] = 0;
}
void gfxSemInit(gfxSem *psem, semcount_t val, semcount_t limit) {
psem->cnt = val;
psem->limit = limit;
}
bool_t gfxSemWait(gfxSem *psem, delaytime_t ms) {
systemticks_t starttm, delay;
// Convert our delay to ticks
switch (ms) {
case TIME_IMMEDIATE:
delay = TIME_IMMEDIATE;
break;
case TIME_INFINITE:
delay = TIME_INFINITE;
break;
default:
delay = gfxMillisecondsToTicks(ms);
if (!delay) delay = 1;
starttm = gfxSystemTicks();
}
INTERRUPTS_OFF();
while (psem->cnt <= 0) {
INTERRUPTS_ON();
// Check if we have exceeded the defined delay
switch (delay) {
case TIME_IMMEDIATE:
return FALSE;
case TIME_INFINITE:
break;
default:
if (gfxSystemTicks() - starttm >= delay)
return FALSE;
break;
}
gfxYield();
INTERRUPTS_OFF();
}
psem->cnt--;
INTERRUPTS_ON();
return TRUE;
}
bool_t gfxSemWaitI(gfxSem *psem) {
if (psem->cnt <= 0)
return FALSE;
psem->cnt--;
return TRUE;
}
void gfxSemSignal(gfxSem *psem) {
INTERRUPTS_OFF();
gfxSemSignalI(psem);
INTERRUPTS_ON();
}
void gfxSemSignalI(gfxSem *psem) {
if (psem->cnt < psem->limit)
psem->cnt++;
}
/*********************************************************
* Sleep functions
*********************************************************/
void gfxSleepMilliseconds(delaytime_t ms) {
systemticks_t starttm, delay;
// Safety first
switch (ms) {
case TIME_IMMEDIATE:
return;
case TIME_INFINITE:
while(1)
gfxYield();
return;
}
// Convert our delay to ticks
delay = gfxMillisecondsToTicks(ms);
starttm = gfxSystemTicks();
do {
gfxYield();
} while (gfxSystemTicks() - starttm < delay);
}
void gfxSleepMicroseconds(delaytime_t ms) {
systemticks_t starttm, delay;
// Safety first
switch (ms) {
case TIME_IMMEDIATE:
return;
case TIME_INFINITE:
while(1)
gfxYield();
return;
}
// Convert our delay to ticks
delay = gfxMillisecondsToTicks(ms/1000);
starttm = gfxSystemTicks();
do {
gfxYield();
} while (gfxSystemTicks() - starttm < delay);
}
/*********************************************************
* Threading functions
*********************************************************/
/**
* There are some compilers we know how they store the jmpbuf. For those
* we can use the constant macro definitions. For others we have to "auto-detect".
* Auto-detection is hairy and there is no guarantee it will work on all architectures.
* For those it doesn't - read the compiler manuals and the library source code to
* work out the correct macro values.
* You can use the debugger to work out the values for your compiler and put them here.
* Defining these macros as constant values makes the system behaviour guaranteed but also
* makes your code compiler and cpu architecture dependant.
*/
#if 0
// Define your compiler constant values here.
// These example values are for mingw32 compiler (x86).
#define AUTO_DETECT_MASK FALSE
#define STACK_DIR_UP FALSE
#define MASK1 0x00000011
#define MASK2 0x00000000
#define STACK_BASE 9
#else
#define AUTO_DETECT_MASK TRUE
#define STACK_DIR_UP stackdirup // TRUE if the stack grow up instead of down
#define MASK1 jmpmask1 // The 1st mask of jmp_buf elements that need relocation
#define MASK2 jmpmask2 // The 2nd mask of jmp_buf elements that need relocation
#define STACK_BASE stackbase // The base of the stack frame relative to the local variables
static bool_t stackdirup;
static uint32_t jmpmask1;
static uint32_t jmpmask2;
static size_t stackbase;
#endif
#include <setjmp.h> /* jmp_buf, setjmp(), longjmp() */
/**
* Some compilers define a _setjmp() and a setjmp().
* The difference between them is that setjmp() saves the signal masks.
* That is of no use to us so prefer to use the _setjmp() methods.
* If they don't exist compile them to be the standard setjmp() function.
* Similarly for longjmp().
*/
#if (!defined(setjmp) && !defined(_setjmp)) || defined(__KEIL__) || defined(__C51__)
#define _setjmp setjmp
#endif
#if (!defined(longjmp) && !defined(_longjmp)) || defined(__KEIL__) || defined(__C51__)
#define _longjmp longjmp
#endif
typedef struct thread {
struct thread * next; // Next thread
int flags; // Flags
#define FLG_THD_ALLOC 0x0001
#define FLG_THD_MAIN 0x0002
#define FLG_THD_DEAD 0x0004
#define FLG_THD_WAIT 0x0008
size_t size; // Size of the thread stack (including this structure)
threadreturn_t (*fn)(void *param); // Thread function
void * param; // Parameter for the thread function
jmp_buf cxt; // The current thread context.
} thread;
typedef struct threadQ {
thread *head;
thread *tail;
} threadQ;
static threadQ readyQ; // The list of ready threads
static threadQ deadQ; // Where we put threads waiting to be deallocated
static thread * current; // The current running thread
static thread mainthread; // The main thread context
static void Qinit(threadQ * q) {
q->head = q->tail = 0;
}
static void Qadd(threadQ * q, thread *t) {
t->next = 0;
if (q->head) {
q->tail->next = t;
q->tail = t;
} else
q->head = q->tail = t;
}
static thread *Qpop(threadQ * q) {
struct thread * t;
if (!q->head)
return 0;
t = q->head;
q->head = t->next;
return t;
}
#if AUTO_DETECT_MASK
// The structure for the saved stack frame information
typedef struct saveloc {
char * localptr;
jmp_buf cxt;
} saveloc;
// A pointer to our auto-detection buffer.
static saveloc *pframeinfo;
/* These functions are not static to prevent the compiler removing them as functions */
void get_stack_state(void) {
char c;
pframeinfo->localptr = (char *)&c;
_setjmp(pframeinfo->cxt);
}
void get_stack_state_in_fn(void) {
pframeinfo++;
get_stack_state();
pframeinfo--;
}
#endif
static void _gosThreadsInit(void) {
Qinit(&readyQ);
current = &mainthread;
current->next = 0;
current->size = sizeof(thread);
current->flags = FLG_THD_MAIN;
current->fn = 0;
current->param = 0;
#if AUTO_DETECT_MASK
{
uint32_t i;
char ** pout;
char ** pin;
size_t diff;
char * framebase;
// Allocate a buffer to store our test data
pframeinfo = gfxAlloc(sizeof(saveloc)*2);
// Get details of the stack frame from within a function
get_stack_state_in_fn();
// Get details of the stack frame outside the function
get_stack_state();
/* Work out the frame entries to relocate by treating the jump buffer as an array of pointers */
stackdirup = pframeinfo[1].localptr > pframeinfo[0].localptr;
pout = (char **)pframeinfo[0].cxt;
pin = (char **)pframeinfo[1].cxt;
diff = pframeinfo[0].localptr - pframeinfo[1].localptr;
framebase = pframeinfo[0].localptr;
jmpmask1 = jmpmask2 = 0;
for (i = 0; i < sizeof(jmp_buf)/sizeof(char *); i++, pout++, pin++) {
if ((size_t)(*pout - *pin) == diff) {
if (i < 32)
jmpmask1 |= 1 << i;
else
jmpmask2 |= 1 << (i-32);
if (stackdirup) {
if (framebase > *pout)
framebase = *pout;
} else {
if (framebase < *pout)
framebase = *pout;
}
}
}
stackbase = stackdirup ? (pframeinfo[0].localptr - framebase) : (framebase - pframeinfo[0].localptr);
// Clean up
gfxFree(pframeinfo);
}
#endif
}
gfxThreadHandle gfxThreadMe(void) {
return (gfxThreadHandle)current;
}
void gfxYield(void) {
if (!_setjmp(current->cxt)) {
// Add us back to the Queue
Qadd(&readyQ, current);
// Check if there are dead processes to deallocate
while ((current = Qpop(&deadQ)))
gfxFree(current);
// Run the next process
current = Qpop(&readyQ);
_longjmp(current->cxt, 1);
}
}
// This routine is not currently public - but it could be.
void gfxThreadExit(threadreturn_t ret) {
// Save the results
current->param = (void *)ret;
current->flags |= FLG_THD_DEAD;
// Add us to the dead list if we need deallocation as we can't free ourselves.
// If someone is waiting on the thread they will do the cleanup.
if ((current->flags & (FLG_THD_ALLOC|FLG_THD_WAIT)) == FLG_THD_ALLOC)
Qadd(&deadQ, current);
// Switch to the next task
current = Qpop(&readyQ);
if (!current)
gfxExit(); // Oops - this should never happen!
_longjmp(current->cxt, 1);
}
gfxThreadHandle gfxThreadCreate(void *stackarea, size_t stacksz, threadpriority_t prio, DECLARE_THREAD_FUNCTION((*fn),p), void *param) {
thread * t;
(void) prio;
// Ensure we have a minimum stack size
if (stacksz < sizeof(thread)+64) {
stacksz = sizeof(thread)+64;
stackarea = 0;
}
if (stackarea) {
t = (thread *)stackarea;
t->flags = 0;
} else {
t = (thread *)gfxAlloc(stacksz);
if (!t)
return 0;
t->flags = FLG_THD_ALLOC;
}
t->size = stacksz;
t->fn = fn;
t->param = param;
if (_setjmp(t->cxt)) {
// This is the new thread - call the function!
gfxThreadExit(current->fn(current->param));
// We never get here
return 0;
}
// Move the stack frame and relocate the context data
{
char ** s;
char * nf;
int diff;
uint32_t i;
// Copy the stack frame
#if AUTO_DETECT_MASK
if (STACK_DIR_UP) { // Stack grows up
nf = (char *)(t) + sizeof(thread) + stackbase;
memcpy(t+1, (char *)&t - stackbase, stackbase+sizeof(char *));
} else { // Stack grows down
nf = (char *)(t) + stacksz - (stackbase + sizeof(char *));
memcpy(nf, &t, stackbase+sizeof(char *));
}
#elif STACK_DIR_UP
// Stack grows up
nf = (char *)(t) + sizeof(thread) + stackbase;
memcpy(t+1, (char *)&t - stackbase, stackbase+sizeof(char *));
#else
// Stack grows down
nf = (char *)(t) + size - (stackbase + sizeof(char *));
memcpy(nf, &t, stackbase+sizeof(char *));
#endif
// Relocate the context data
s = (char **)(t->cxt);
diff = nf - (char *)&t;
// Relocate the elements we know need to be relocated
for (i = 1; i && i < MASK1; i <<= 1, s++) {
if ((MASK1 & i))
*s += diff;
}
#ifdef MASK2
for (i = 1; i && i < MASK2; i <<= 1, s++) {
if ((MASK1 & i))
*s += diff;
}
#endif
}
// Add this thread to the ready queue
Qadd(&readyQ, t);
return t;
}
threadreturn_t gfxThreadWait(gfxThreadHandle th) {
thread * t;
t = th;
if (t == current)
return -1;
// Mark that we are waiting
t->flags |= FLG_THD_WAIT;
// Wait for the thread to die
while(!(t->flags & FLG_THD_DEAD))
gfxYield();
// Unmark
t->flags &= ~FLG_THD_WAIT;
// Clean up resources if needed
if (t->flags & FLG_THD_ALLOC)
gfxFree(t);
// Return the status left by the dead process
return (threadreturn_t)t->param;
}
#endif /* GFX_USE_OS_RAW32 */

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/*
* This file is subject to the terms of the GFX License. If a copy of
* the license was not distributed with this file, you can obtain one at:
*
* http://ugfx.org/license.html
*/
/**
* The arduino GOS implementation is similar to the bare metal raw32 gos implementation.
* It uses cooperative multi-tasking. Be careful
* when writing device drivers not to disturb the assumptions this creates by performing
* call-backs to uGFX code unless you define the INTERRUPTS_OFF() and INTERRUPTS_ON() macros.
* It still requires some C runtime library support...
* enough startup to initialise the stack, interrupts, static data etc and call main().
* setjmp() and longjmp() - for threading
* memcpy() - for heap and threading
* malloc(), realloc and free() - if GOS_RAW_HEAP_SIZE == 0
*
* You must also define the following routines in your own code so that timing functions will work...
* systemticks_t gfxSystemTicks(void);
* systemticks_t gfxMillisecondsToTicks(delaytime_t ms);
*/
#ifndef _GOS_ARDUINO_H
#define _GOS_ARDUINO_H
#if GFX_USE_OS_ARDUINO
#include <Arduino.h>
/*===========================================================================*/
/* Type definitions */
/*===========================================================================*/
typedef bool bool_t;
#if 0
// Already defined by Arduino
typedef signed char int8_t;
typedef unsigned char uint8_t;
typedef signed short int16_t;
typedef unsigned short uint16_t;
typedef signed int int32_t;
typedef unsigned int uint32_t;
typedef uint32_t size_t;
#endif
typedef uint32_t delaytime_t;
typedef uint32_t systemticks_t;
typedef short semcount_t;
typedef int threadreturn_t;
typedef int threadpriority_t;
#define DECLARE_THREAD_FUNCTION(fnName, param) threadreturn_t fnName(void *param)
#define DECLARE_THREAD_STACK(name, sz) uint8_t name[sz];
#define TIME_IMMEDIATE 0
#define TIME_INFINITE ((delaytime_t)-1)
#define MAX_SEMAPHORE_COUNT 0x7FFF
#define LOW_PRIORITY 0
#define NORMAL_PRIORITY 1
#define HIGH_PRIORITY 2
typedef struct {
semcount_t cnt;
semcount_t limit;
} gfxSem;
typedef uint32_t gfxMutex;
typedef void * gfxThreadHandle;
#define gfxThreadClose(thread)
#define gfxMutexDestroy(pmutex)
#define gfxSemDestroy(psem)
#define gfxSemCounter(psem) ((psem)->cnt)
#define gfxSemCounterI(psem) ((psem)->cnt)
#define gfxSystemTicks() millis()
#define gfxMillisecondsToTicks(ms) (ms)
#ifdef __cplusplus
extern "C" {
#endif
void gfxHalt(const char *msg);
void gfxExit(void);
void *gfxAlloc(size_t sz);
void *gfxRealloc(void *ptr, size_t oldsz, size_t newsz);
void gfxFree(void *ptr);
void gfxYield(void);
void gfxSleepMilliseconds(delaytime_t ms);
void gfxSleepMicroseconds(delaytime_t ms);
//systemticks_t gfxSystemTicks(void);
//systemticks_t gfxMillisecondsToTicks(delaytime_t ms);
void gfxSystemLock(void);
void gfxSystemUnlock(void);
void gfxMutexInit(gfxMutex *pmutex);
void gfxMutexEnter(gfxMutex *pmutex);
void gfxMutexExit(gfxMutex *pmutex);
void gfxSemInit(gfxSem *psem, semcount_t val, semcount_t limit);
bool_t gfxSemWait(gfxSem *psem, delaytime_t ms);
bool_t gfxSemWaitI(gfxSem *psem);
void gfxSemSignal(gfxSem *psem);
void gfxSemSignalI(gfxSem *psem);
gfxThreadHandle gfxThreadCreate(void *stackarea, size_t stacksz, threadpriority_t prio, DECLARE_THREAD_FUNCTION((*fn),p), void *param);
threadreturn_t gfxThreadWait(gfxThreadHandle thread);
gfxThreadHandle gfxThreadMe(void);
#ifdef __cplusplus
}
#endif
#endif /* GFX_USE_OS_ARDUINO */
#endif /* _GOS_ARDUINO_H */