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Skip wave padding when size = 0

This commit is contained in:
Guy McSwain 2020-03-04 01:25:01 -06:00
parent f4a4b9772f
commit 58c5ad756b
1 changed files with 18 additions and 15 deletions
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29
pigpio.c
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@ -3130,24 +3130,27 @@ static int wave2Cbs(unsigned wave_mode, int *CB, int *BOOL, int *TOOL, int size)
}
}
/* pad the wave */
botCB = *CB + NUM_WAVE_CBS / size - 1;
botOOL = *BOOL + NUM_WAVE_OOL / size - 1;
//topOOL = *TOOL - (NUM_WAVE_OOL / size / 8);
if (size)
{
/* pad the wave */
/* link the last CB to end of wave */
botCB = *CB + NUM_WAVE_CBS / size - 1;
botOOL = *BOOL + NUM_WAVE_OOL / size - 1;
//topOOL = //Fix: Ignore topOOL, flags not supported.
p->next = waveCbPOadr(botCB);
/* link the last CB to end of wave */
/* add dummy cb at end of DMA */
p->next = waveCbPOadr(botCB);
p = rawWaveCBAdr(botCB++);
p->info = NORMAL_DMA | DMA_DEST_IGNORE;
p->src = waveOOLPOadr(botOOL++);
p->dst = ((GPIO_BASE + (GPSET0*4)) & 0x00ffffff) | PI_PERI_BUS;
p->length = 4;
p->next = 0;
/* add dummy cb at end of DMA */
p = rawWaveCBAdr(botCB++);
p->info = NORMAL_DMA | DMA_DEST_IGNORE;
p->src = waveOOLPOadr(botOOL++);
p->dst = ((GPIO_BASE + (GPSET0*4)) & 0x00ffffff) | PI_PERI_BUS;
p->length = 4;
p->next = 0;
}
if (p != NULL)
{