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The interrupt occurs over the counter overflow

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This commit is contained in:
Aleksandr Vyhovanec 2017-03-23 17:34:45 +03:00
parent 528b938958
commit 06af125e45
1 changed files with 3 additions and 3 deletions
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6
arch/arm/src/stm32/stm32_qencoder.c
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@ -693,17 +693,17 @@ static int stm32_interrupt(int irq, FAR void *context, FAR void *arg)
stm32_putreg16(priv, STM32_GTIM_SR_OFFSET, regval & ~GTIM_SR_UIF);
/* Check the direction bit in the CR1 register and add or subtract the
* maximum value, as appropriate.
* maximum value + 1, as appropriate.
*/
regval = stm32_getreg16(priv, STM32_GTIM_CR1_OFFSET);
if ((regval & ATIM_CR1_DIR) != 0)
{
priv->position -= (int32_t)0x0000ffff;
priv->position -= (int32_t)0x00010000;
}
else
{
priv->position += (int32_t)0x0000ffff;
priv->position += (int32_t)0x00010000;
}
return OK;