SPI write/readinto work, tested with BME280

diff --git a/src/adafruit_blinka/microcontroller/raspi_23/spi.py b/src/adafruit_blinka/microcontroller/raspi_23/spi.py
index d6627c6ecfda5b1b329cc1b96b3732e852bf2129..7e3eec581bad94b21e23dc643adcadf493300492 100644 (file)
--- 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:
         if not buf:
             return
         try:

-

             self._spi.open(self._port, 0)
             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
             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
         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 915547a012697c5eed0e3f1ec5e7e912542a6742..708039c686b33fb1caabdfe6d9299a9bc2af07d6 100755 (executable)
--- 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._spi.write(buf)
 
     def readinto(self, buf):

-        return self.readinto(buf)
+        return self._spi.readinto(buf)

 
     def write_readinto(self, buffer_out, buffer_in):
 
     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):
 
 
 class UART(Lockable):