trying to fix spis duplex ...

elcritch · Nov 4, 2020 · 01dff7d · 01dff7d
1 parent 981467f
commit 01dff7d
Showing 1 changed file with 4 additions and 1 deletion.
diff --git a/src/nesper/spis.nim b/src/nesper/spis.nim
@@ -262,7 +262,10 @@ proc readTrans*(dev: SpiDev;
   if (dev.devcfg.flags.uint32 and HALFDUPLEX.uint32) > 0:
     fullTrans(dev, cmd=cmd, cmdaddr=cmdaddr, rxlength=rxlength, txlength=bits(0), txdata=[], flags=flags)
   else:
-    fullTrans(dev, cmd=cmd, cmdaddr=cmdaddr, rxlength=rxlength, txlength=rxlength, txdata=[], flags=flags)
+    var n = rxlength/8
+    if n*8 <= rxlength: n += 1
+    var data = newSeq[byte](n)
+    fullTrans(dev, cmd=cmd, cmdaddr=cmdaddr, rxlength=rxlength, txlength=data, txdata=[], flags=flags)
 
 proc getData*(trn: SpiTrans): seq[byte] = 
   if trn.trn.rxlength < 32: