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Add ioctl to support software triggering of ADC/DAC conversions

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This commit is contained in:
Gregory Nutt 2013-10-25 14:19:09 -06:00
parent 48bcb3f141
commit cf3845919b
1 changed files with 20 additions and 7 deletions
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27
arch/arm/src/sama5/sam_adc.c
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@ -50,6 +50,8 @@
#include <nuttx/config.h>
#include <sys/types.h>
#include <sys/ioctl.h>
#include <stdio.h>
#include <stdint.h>
#include <stdbool.h>
@ -1081,18 +1083,29 @@ static void sam_adc_rxint(struct adc_dev_s *dev, bool enable)
static int sam_adc_ioctl(struct adc_dev_s *dev, int cmd, unsigned long arg)
{
struct sam_adc_s *priv = (struct sam_adc_s *)dev->ad_priv;
int ret = OK;
avdbg("cmd=%d arg=%ld\n", cmd, arg);
/* No ioctl commands supported:
*
* REVISIT: Need to implement a ioctl to support software triggering
*/
switch (cmd)
{
#ifdef CONFIG_SAMA5_ADC_SWTRIG
# error Need an ioctl to perform software triggering
case ANIOC_TRIGGER: /* Software trigger */
{
sam_adc_putreg(priv, SAM_ADC_CR, ADC_CR_START); /* Start conversion */
}
break;
#endif
return -ENOTTY;
/* Unsupported or invalid command */
default:
ret = -ENOTTY;
break;
}
return ret;
}
/****************************************************************************