From 9f302982b22b1ee160bad6d0408a01f4b220b934 Mon Sep 17 00:00:00 2001 From: brentru Date: Tue, 24 Jul 2018 15:59:06 -0400 Subject: [PATCH] adding fixes from previous PR review --- src/adafruit_blinka/microcontroller/raspi_23/spi.py | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) diff --git a/src/adafruit_blinka/microcontroller/raspi_23/spi.py b/src/adafruit_blinka/microcontroller/raspi_23/spi.py index d862e01..1b6bdc0 100755 --- a/src/adafruit_blinka/microcontroller/raspi_23/spi.py +++ b/src/adafruit_blinka/microcontroller/raspi_23/spi.py @@ -71,8 +71,11 @@ class SPI: def write_readinto(self, buffer_out, buffer_in, out_start=0, out_end=None, in_start=0, in_end=None): if not buffer_out or not buffer_in: return + if out_end is None or in_end is None: + out_end = len(buffer_out) + in_end = len(buffer_in) if out_end - out_start != in_end - in_start: - raise RuntimeError + raise RuntimeError('Buffer slices must be of equal length.') try: self._spi.open(self._port, 0) try: @@ -82,8 +85,8 @@ class SPI: self._spi.max_speed_hz = self.baudrate self._spi.mode = self.mode self._spi.bits_per_word = self.bits - data = self._spi.xfer(list(buffer_out)) - for i in range(len(buffer_in)): # 'readinto' the given buffer + data = self._spi.xfer(list(buffer_out[out_start:out_end])) + for i in range(len(buffer_in[in_start:in_end])): # 'readinto' the given buffer buffer_in[i] = data[i] self._spi.close() except FileNotFoundError as not_found: -- 2.49.0