From: Frank Mori Hess <fmhess@speakeasy.net>
Date: Wed, 12 Mar 2003 22:04:21 +0000 (+0000)
Subject: added comedi_data_read_hint() and comedi_data_read_delayed to kcomedilib
X-Git-Tag: r0_7_67x~64
X-Git-Url: http://git.tremily.us/?a=commitdiff_plain;h=193c6d047a29f69715611fea6ca653e3675293f6;p=comedi.git

added comedi_data_read_hint() and comedi_data_read_delayed to kcomedilib
---

diff --git a/comedi/kcomedilib/data.c b/comedi/kcomedilib/data.c
index 457af601..24d8d808 100644
--- a/comedi/kcomedilib/data.c
+++ b/comedi/kcomedilib/data.c
@@ -57,3 +57,31 @@ int comedi_data_read(comedi_t *dev,unsigned int subdev,unsigned int chan,
 	return comedi_do_insn(dev,&insn);
 }
 
+int comedi_data_read_hint(comedi_t *dev,unsigned int subdev,unsigned int chan,
+	unsigned int range,unsigned int aref)
+{
+	comedi_insn insn;
+	lsampl_t dummy_data;
+	
+	memset(&insn,0,sizeof(insn));
+	insn.insn = INSN_READ;
+	insn.n = 0;
+	insn.data = &dummy_data;
+	insn.subdev = subdev;
+	insn.chanspec = CR_PACK(chan,range,aref);
+
+	return comedi_do_insn(dev,&insn);
+}
+
+int comedi_data_read_delayed(comedi_t *dev,unsigned int subdev,unsigned int chan,
+	unsigned int range,unsigned int aref,lsampl_t *data, unsigned int nano_sec)
+{
+	int retval;
+
+	retval = comedi_data_read_hint( dev, subdev, chan, range, aref );
+	if( retval < 0 ) return retval;
+
+	udelay( ( nano_sec + 999 ) / 1000 );
+
+	return comedi_data_read( dev, subdev, chan, range, aref, data );
+}
diff --git a/include/linux/comedilib.h b/include/linux/comedilib.h
index c1754b30..462ce8ce 100644
--- a/include/linux/comedilib.h
+++ b/include/linux/comedilib.h
@@ -71,6 +71,10 @@ int comedi_data_write(comedi_t *dev,unsigned int subdev,unsigned int chan,
 	unsigned int range,unsigned int aref,lsampl_t data);
 int comedi_data_read(comedi_t *dev,unsigned int subdev,unsigned int chan,
 	unsigned int range,unsigned int aref,lsampl_t *data);
+int comedi_data_read_hint(comedi_t *dev,unsigned int subdev,unsigned int chan,
+	unsigned int range,unsigned int aref);
+int comedi_data_read_delayed(comedi_t *dev,unsigned int subdev,unsigned int chan,
+	unsigned int range,unsigned int aref,lsampl_t *data,unsigned int nano_sec);
 int comedi_dio_config(comedi_t *dev,unsigned int subdev,unsigned int chan,
 	unsigned int io);
 int comedi_dio_read(comedi_t *dev,unsigned int subdev,unsigned int chan,