stmhal: Fix adc.read_timed so buffer store respects element size.

Addresses issue #1154.

2 files changed, 25 insertions, 2 deletions

diff --git a/tests/pyb/adc.py b/tests/pyb/adc.py
index 7bed54e9f..6508d7e24 100644
--- a/tests/pyb/adc.py
+++ b/tests/pyb/adc.py
@@ -1,10 +1,30 @@
 from pyb import ADC
 from pyb import Pin
 
+pin = Pin('X22', mode=Pin.IN, pull=Pin.PULL_DOWN)
 adc = ADC('X22')
 print(adc)
 
-adc.read()
+# read single sample
+val = adc.read()
+assert val < 500
 
-buf = bytearray(100)
+# read into bytearray
+buf = bytearray(50)
 adc.read_timed(buf, 500)
+print(len(buf))
+for i in buf:
+    assert i < 500
+
+# read into arrays with different element sizes
+import array
+ar = array.array('h', 25 * [0])
+adc.read_timed(ar, 500)
+print(len(ar))
+for i in buf:
+    assert i < 500
+ar = array.array('i', 30 * [0])
+adc.read_timed(ar, 500)
+print(len(ar))
+for i in buf:
+    assert i < 500
diff --git a/tests/pyb/adc.py.exp b/tests/pyb/adc.py.exp
index bbc6af737..76f3914b0 100644
--- a/tests/pyb/adc.py.exp
+++ b/tests/pyb/adc.py.exp
@@ -1 +1,4 @@
 <ADC on X22 channel=13>
+50
+25
+30