From: ladyada <limor@ladyada.net>
Date: Sat, 30 Jun 2018 20:55:00 +0000 (-0400)
Subject: SPI write/readinto work, tested with BME280
X-Git-Tag: 0.1.8^2
X-Git-Url: https://git.ayoreis.com/Adafruit_Blinka-hackapet.git/commitdiff_plain/a280deaa4ec75af18ad67db05ff52a940daf4d71?hp=-c

SPI write/readinto work, tested with BME280
---

a280deaa4ec75af18ad67db05ff52a940daf4d71
diff --git a/src/adafruit_blinka/microcontroller/raspi_23/spi.py b/src/adafruit_blinka/microcontroller/raspi_23/spi.py
index d6627c6..7e3eec5 100644
--- a/src/adafruit_blinka/microcontroller/raspi_23/spi.py
+++ b/src/adafruit_blinka/microcontroller/raspi_23/spi.py
@@ -34,9 +34,11 @@ class SPI:
         if not buf:
             return
         try:
-
             self._spi.open(self._port, 0)
-            self._spi.no_cs = True
+            try:
+              self._spi.no_cs = True  # this doesn't work but try anyways
+            except AttributeError:
+              pass
             self._spi.max_speed_hz = self.baudrate
             self._spi.mode = self.mode
             self._spi.bits_per_word = self.bits
@@ -45,3 +47,23 @@ class SPI:
         except FileNotFoundError as not_found:
             print("Could not open SPI device - check if SPI is enabled in kernel!")
             raise
+
+    def readinto(self, buf):
+        if not buf:
+            return
+        try:
+            self._spi.open(self._port, 0)
+            try:
+              self._spi.no_cs = True  # this doesn't work but try anyways
+            except AttributeError:
+              pass
+            self._spi.max_speed_hz = self.baudrate
+            self._spi.mode = self.mode
+            self._spi.bits_per_word = self.bits
+            data = self._spi.readbytes(len(buf))
+            for i in range(len(buf)):  # 'readinto' the given buffer
+              buf[i] = data[i]
+            self._spi.close()
+        except FileNotFoundError as not_found:
+            print("Could not open SPI device - check if SPI is enabled in kernel!")
+            raise
\ No newline at end of file
diff --git a/src/busio.py b/src/busio.py
index 915547a..708039c 100755
--- a/src/busio.py
+++ b/src/busio.py
@@ -110,10 +110,10 @@ class SPI(Lockable):
         return self._spi.write(buf)
 
     def readinto(self, buf):
-        return self.readinto(buf)
+        return self._spi.readinto(buf)
 
     def write_readinto(self, buffer_out, buffer_in):
-        return self.write_readinto(buffer_out, buffer_in)
+        return self._spi.write_readinto(buffer_out, buffer_in)
 
 
 class UART(Lockable):