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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_GADC
/* Include the driver defines */
#include "gadc_driver.h"
#if GADC_MAX_HIGH_SPEED_SAMPLERATE > GADC_MAX_SAMPLE_FREQUENCY/2
#error "GADC: GADC_MAX_HIGH_SPEED_SAMPLERATE has been set too high. It must be less than half the maximum CPU rate"
#endif
#define GADC_HSADC_GTIMER 0x8000
#define GADC_ADC_RUNNING 0x4000
#define GADC_HSADC_CONVERTION 0x2000
typedef struct NonTimerData_t {
gfxQueueGSyncItem next;
GADCCallbackFunction callback;
union {
void *param;
gfxSem sigdone;
};
GadcNonTimerJob job;
} NonTimerData;
static volatile uint16_t hsFlags;
static size_t hsBytesPerConv;
static GadcTimerJob hsJob;
static GDataBuffer *hsData;
static gfxQueueGSync hsListDone;
static GADCISRCallbackFunction hsISRcallback;
#if GFX_USE_GEVENT
static GTimer hsGTimer;
#endif
static GTimer lsGTimer;
static gfxQueueGSync lsListToDo;
static gfxQueueGSync lsListDone;
static NonTimerData *lsData;
void gadcGotDataI(size_t n) {
if ((hsFlags & GADC_HSADC_CONVERTION)) {
// A set of timer conversions is done - add them
hsJob.done += n;
// Are we finished yet? (or driver signalled complete now)
if (n && hsJob.done < hsJob.todo)
return;
// Clear event flags we might set
hsFlags &= ~(GADC_HSADC_GOTBUFFER|GADC_HSADC_STALL);
// Is there any data in it
if (!hsJob.done) {
// Oops - no data in this buffer. Just return it to the free-list
gfxBufferReleaseI(hsData);
goto starttimerjob; // Restart the timer job
}
// Save the buffer on the hsListDone list
hsData->len = hsJob.done * hsBytesPerConv;
gfxQueueGSyncPutI(&hsListDone, (gfxQueueGSyncItem *)hsData);
hsFlags |= GADC_HSADC_GOTBUFFER;
/* Signal a buffer completion */
if (hsISRcallback)
hsISRcallback();
#if GFX_USE_GEVENT
if (hsFlags & GADC_HSADC_GTIMER)
gtimerJabI(&hsGTimer);
#endif
// Stop if we have been told to
if (!(hsFlags & GADC_HSADC_RUNNING)) {
gadc_lld_stop_timerI();
// Get the next free buffer
} else if (!(hsData = gfxBufferGetI())) {
// Oops - no free buffers. Stall
hsFlags &= ~GADC_HSADC_RUNNING;
hsFlags |= GADC_HSADC_STALL;
gadc_lld_stop_timerI();
// Prepare the next job
} else {
// Return this new job
#if GFX_USE_OS_CHIBIOS
// ChibiOS api bug - samples must be even
hsJob.todo = (hsData->size / hsBytesPerConv) & ~1;
#else
hsJob.todo = hsData->size / hsBytesPerConv;
#endif
hsJob.done = 0;
hsJob.buffer = (adcsample_t *)(hsData+1);
}
// Start a job preferring a non-timer job
if ((lsData = (NonTimerData *)gfxQueueGSyncGetI(&lsListToDo))) {
hsFlags &= ~GADC_HSADC_CONVERTION;
gadc_lld_nontimerjobI(&lsData->job);
} else if ((hsFlags & GADC_HSADC_RUNNING)) {
hsFlags |= GADC_HSADC_CONVERTION;
gadc_lld_timerjobI(&hsJob);
} else
hsFlags &= ~GADC_ADC_RUNNING;
} else {
// Did it fail
if (!n) {
// Push it back on the head of the queue - it didn't actually get done
gfxQueueGSyncPushI(&lsListToDo, (gfxQueueGSyncItem *)lsData);
lsData = 0;
goto starttimerjob;
}
// A non-timer job completed - signal
if (lsData->callback) {
// Put it on the completed list and signal the timer to do the call-backs
gfxQueueGSyncPutI(&lsListDone, (gfxQueueGSyncItem *)lsData);
gtimerJabI(&lsGTimer);
} else {
// Signal the thread directly
gfxSemSignalI(&lsData->sigdone);
}
lsData = 0;
// Start a job preferring a timer job
starttimerjob:
if ((hsFlags & GADC_HSADC_RUNNING)) {
hsFlags |= GADC_HSADC_CONVERTION;
gadc_lld_timerjobI(&hsJob);
} else if ((lsData = (NonTimerData *)gfxQueueGSyncGetI(&lsListToDo))) {
hsFlags &= ~GADC_HSADC_CONVERTION;
gadc_lld_nontimerjobI(&lsData->job);
} else
hsFlags &= ~GADC_ADC_RUNNING;
}
}
/* Our module initialiser */
void _gadcInit(void)
{
gadc_lld_init();
gfxQueueGSyncInit(&hsListDone);
#if GFX_USE_GEVENT
gtimerInit(&hsGTimer);
#endif
gtimerInit(&lsGTimer);
gfxQueueGSyncInit(&lsListToDo);
gfxQueueGSyncInit(&lsListDone);
}
void _gadcDeinit(void)
{
/* commented stuff is ToDo */
// gadc_lld_deinit();
gfxQueueGSyncDeinit(&hsListDone);
#if GFX_USE_GEVENT
gtimerDeinit(&hsGTimer);
#endif
gtimerDeinit(&lsGTimer);
gfxQueueGSyncDeinit(&lsListToDo);
gfxQueueGSyncDeinit(&lsListDone);
}
#if GFX_USE_GEVENT
static void HighSpeedGTimerCallback(void *param) {
(void) param;
GSourceListener *psl;
GEventADC *pe;
psl = 0;
while ((psl = geventGetSourceListener((GSourceHandle)(&hsGTimer), psl))) {
if (!(pe = (GEventADC *)geventGetEventBuffer(psl))) {
// This listener is missing - save this.
psl->srcflags |= GADC_HSADC_LOSTEVENT;
continue;
}
pe->type = GEVENT_ADC;
pe->flags = (hsFlags & (GADC_HSADC_RUNNING|GADC_HSADC_GOTBUFFER|GADC_HSADC_STALL)) | psl->srcflags;
psl->srcflags = 0;
geventSendEvent(psl);
}
}
#endif
void gadcHighSpeedInit(uint32_t physdev, uint32_t frequency)
{
if ((hsFlags & GADC_HSADC_RUNNING))
gadcHighSpeedStop();
/* Just save the details and reset everything for now */
hsJob.physdev = physdev;
hsJob.frequency = frequency;
hsISRcallback = 0;
hsBytesPerConv = gadc_lld_samplesperconversion(physdev) * sizeof(adcsample_t);
}
#if GFX_USE_GEVENT
GSourceHandle gadcHighSpeedGetSource(void) {
if (!gtimerIsActive(&hsGTimer))
gtimerStart(&hsGTimer, HighSpeedGTimerCallback, 0, gTrue, gDelayForever);
hsFlags |= GADC_HSADC_GTIMER;
return (GSourceHandle)&hsGTimer;
}
#endif
void gadcHighSpeedSetISRCallback(GADCISRCallbackFunction isrfn) {
hsISRcallback = isrfn;
}
GDataBuffer *gadcHighSpeedGetData(gDelay ms) {
return (GDataBuffer *)gfxQueueGSyncGet(&hsListDone, ms);
}
GDataBuffer *gadcHighSpeedGetDataI(void) {
return (GDataBuffer *)gfxQueueGSyncGetI(&hsListDone);
}
void gadcHighSpeedStart(void) {
// Safety first
if (!hsJob.frequency || !hsBytesPerConv)
return;
gfxSystemLock();
if (!(hsFlags & GADC_HSADC_RUNNING)) {
if (!(hsData = gfxBufferGetI())) {
// Oops - no free buffers. Stall
hsFlags |= GADC_HSADC_STALL;
#if GFX_USE_GEVENT
if (hsFlags & GADC_HSADC_GTIMER)
gtimerJabI(&hsGTimer);
#endif
// Prepare the next job
} else {
#if GFX_USE_OS_CHIBIOS
// ChibiOS api bug - samples must be even
hsJob.todo = (hsData->size / hsBytesPerConv) & ~1;
#else
hsJob.todo = hsData->size / hsBytesPerConv;
#endif
hsJob.done = 0;
hsJob.buffer = (adcsample_t *)(hsData+1);
hsFlags |= GADC_HSADC_RUNNING;
// Start the timer
gadc_lld_start_timerI(hsJob.frequency);
// If nothing is running start the job
if (!(hsFlags & GADC_ADC_RUNNING)) {
hsFlags |= (GADC_HSADC_CONVERTION|GADC_ADC_RUNNING);
gadc_lld_timerjobI(&hsJob);
}
}
}
gfxSystemUnlock();
}
void gadcHighSpeedStop(void) {
// Stop it and wait for completion
hsFlags &= ~GADC_HSADC_RUNNING;
while ((hsFlags & GADC_HSADC_CONVERTION))
gfxYield();
}
static void LowSpeedGTimerCallback(void *param) {
(void) param;
NonTimerData *pdata;
// Look for completed non-timer jobs and call the call-backs for each
while ((pdata = (NonTimerData *)gfxQueueGSyncGet(&lsListDone, gDelayNone))) {
pdata->callback(pdata->job.buffer, pdata->param);
gfxFree(pdata);
}
}
void gadcLowSpeedGet(uint32_t physdev, adcsample_t *buffer) {
NonTimerData ndata;
// Prepare the job
gfxSemInit(&ndata.sigdone, 0, 1);
ndata.job.physdev = physdev;
ndata.job.buffer = buffer;
ndata.callback = 0;
// Activate it
gfxSystemLock();
if (!(hsFlags & GADC_ADC_RUNNING)) {
// Nothing is running - start the job
lsData = &ndata;
hsFlags |= GADC_ADC_RUNNING;
hsFlags &= ~GADC_HSADC_CONVERTION;
gadc_lld_nontimerjobI(&ndata.job);
} else {
// Just put it on the queue
gfxQueueGSyncPutI(&lsListToDo, (gfxQueueGSyncItem *)&ndata);
}
gfxSystemUnlock();
// Wait for it to complete
gfxSemWait(&ndata.sigdone, gDelayForever);
gfxSemDestroy(&ndata.sigdone);
}
gBool gadcLowSpeedStart(uint32_t physdev, adcsample_t *buffer, GADCCallbackFunction fn, void *param) {
NonTimerData *pdata;
/* Start the Low Speed Timer */
if (!gtimerIsActive(&lsGTimer))
gtimerStart(&lsGTimer, LowSpeedGTimerCallback, 0, gTrue, gDelayForever);
// Prepare the job
if (!(pdata = gfxAlloc(sizeof(NonTimerData))))
return gFalse;
pdata->job.physdev = physdev;
pdata->job.buffer = buffer;
pdata->callback = fn;
pdata->param = param;
// Activate it
gfxSystemLock();
if (!(hsFlags & GADC_ADC_RUNNING)) {
// Nothing is running - start the job
lsData = pdata;
hsFlags |= GADC_ADC_RUNNING;
hsFlags &= ~GADC_HSADC_CONVERTION;
gadc_lld_nontimerjobI(&pdata->job);
} else {
// Just put it on the queue
gfxQueueGSyncPutI(&lsListToDo, (gfxQueueGSyncItem *)pdata);
}
gfxSystemUnlock();
return gTrue;
}
#endif /* GFX_USE_GADC */
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