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Use two-beat DMA control block on pulse with set and clear OOLs.

This commit is contained in:
Guy McSwain 2020-03-18 16:31:42 -05:00
parent 7f05ff4c48
commit c38087352f
1 changed files with 22 additions and 10 deletions
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32
pigpio.c
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@ -396,6 +396,7 @@ bit 0 READ_LAST_NOT_SET_ERROR
#define DMA_DEST_WIDTH (1<< 5) #define DMA_DEST_WIDTH (1<< 5)
#define DMA_DEST_INC (1<< 4) #define DMA_DEST_INC (1<< 4)
#define DMA_WAIT_RESP (1<< 3) #define DMA_WAIT_RESP (1<< 3)
#define DMA_TDMODE (1<< 1)
#define DMA_DEBUG_READ_ERR (1<<2) #define DMA_DEBUG_READ_ERR (1<<2)
#define DMA_DEBUG_FIFO_ERR (1<<1) #define DMA_DEBUG_FIFO_ERR (1<<1)
@ -664,6 +665,7 @@ bit 0 READ_LAST_NOT_SET_ERROR
/* --------------------------------------------------------------- */ /* --------------------------------------------------------------- */
#define NORMAL_DMA (DMA_NO_WIDE_BURSTS | DMA_WAIT_RESP) #define NORMAL_DMA (DMA_NO_WIDE_BURSTS | DMA_WAIT_RESP)
#define TWO_BEAT_DMA (DMA_TDMODE | DMA_BURST_LENGTH(1))
#define TIMED_DMA(x) (DMA_DEST_DREQ | DMA_PERIPHERAL_MAPPING(x)) #define TIMED_DMA(x) (DMA_DEST_DREQ | DMA_PERIPHERAL_MAPPING(x))
@ -2998,8 +3000,7 @@ static void waveCBsOOLs(int *numCBs, int *numBOOLs, int *numTOOLs)
for (i=0; i<numWaves; i++) for (i=0; i<numWaves; i++)
{ {
if (waves[i].gpioOn) {numCB++; numBOOL++;} if (waves[i].gpioOn || waves[i].gpioOff) {numCB++; numBOOL++;}
if (waves[i].gpioOff) {numCB++; numBOOL++;}
if (waves[i].flags & WAVE_FLAG_READ) {numCB++; numTOOL++;} if (waves[i].flags & WAVE_FLAG_READ) {numCB++; numTOOL++;}
if (waves[i].flags & WAVE_FLAG_TICK) {numCB++; numTOOL++;} if (waves[i].flags & WAVE_FLAG_TICK) {numCB++; numTOOL++;}
@ -3018,7 +3019,7 @@ static int wave2Cbs(unsigned wave_mode, int *CB, int *BOOL, int *TOOL,
{ {
int botCB=*CB, botOOL=*BOOL, topOOL=*TOOL; int botCB=*CB, botOOL=*BOOL, topOOL=*TOOL;
int status; int status, s_stride;
rawCbs_t *p=NULL; rawCbs_t *p=NULL;
@ -3062,7 +3063,22 @@ static int wave2Cbs(unsigned wave_mode, int *CB, int *BOOL, int *TOOL,
for (i=0; i<numWaves; i++) for (i=0; i<numWaves; i++)
{ {
if (waves[i].gpioOn) if (waves[i].gpioOn && waves[i].gpioOff)
/* Use 2-beat burst */
{
p = rawWaveCBAdr(botCB++);
p->info = TWO_BEAT_DMA;
p->src = waveOOLPOadr(botOOL);
waveSetOOL(botOOL++, waves[i].gpioOn);
s_stride = waveOOLPOadr(botOOL) - p->src;
waveSetOOL(botOOL++, waves[i].gpioOff);
p->dst = ((GPIO_BASE + (GPSET0*4)) & 0x00ffffff) | PI_PERI_BUS;
p->length = (2<<16) + 4; // 2 transfers of 4 bytes each
p->stride = (12<<16) + s_stride; // d_stride = (GPCLR0-GPSET0)*4 = 12
p->next = waveCbPOadr(botCB);
}
if (waves[i].gpioOn && !waves[i].gpioOff)
{ {
waveSetOOL(botOOL, waves[i].gpioOn); waveSetOOL(botOOL, waves[i].gpioOn);
@ -3074,8 +3090,7 @@ static int wave2Cbs(unsigned wave_mode, int *CB, int *BOOL, int *TOOL,
p->length = 4; p->length = 4;
p->next = waveCbPOadr(botCB); p->next = waveCbPOadr(botCB);
} }
if (waves[i].gpioOff && !waves[i].gpioOn)
if (waves[i].gpioOff)
{ {
waveSetOOL(botOOL, waves[i].gpioOff); waveSetOOL(botOOL, waves[i].gpioOff);
@ -3087,7 +3102,6 @@ static int wave2Cbs(unsigned wave_mode, int *CB, int *BOOL, int *TOOL,
p->length = 4; p->length = 4;
p->next = waveCbPOadr(botCB); p->next = waveCbPOadr(botCB);
} }
if (waves[i].flags & WAVE_FLAG_READ) if (waves[i].flags & WAVE_FLAG_READ)
{ {
p = rawWaveCBAdr(botCB++); p = rawWaveCBAdr(botCB++);
@ -3368,9 +3382,7 @@ int rawWaveAddGeneric(unsigned numIn1, rawWave_t *in1)
cbs += waveDelayCBs(tDelay); cbs += waveDelayCBs(tDelay);
if (out[outPos].gpioOn) cbs++; /* one cb if gpio on */ if (out[outPos].gpioOn || out[outPos].gpioOff) cbs++;
if (out[outPos].gpioOff) cbs++; /* one cb if gpio off */
if (out[outPos].flags & WAVE_FLAG_READ) if (out[outPos].flags & WAVE_FLAG_READ)
{ {