When trying to use SPI mode with a 5V system, I found that MOSI does not
correctly enter High Impedance mode. Consequently, it hovers at around 3.3V
even when I have Vpu set to 5V and pullups enabled. After a quick glance
through the source, it looks like a simple typo:
===================================================================
--- SPI.c (revision 602)
+++ SPI.c (working copy)
@@ -36,7 +36,7 @@
#define SPICS BP_CS
//open drain control registers for OUTPUT pins
-#define SPIMOSI_ODC BP_MISO_ODC
+#define SPIMOSI_ODC BP_MOSI_ODC
#define SPICLK_ODC BP_CLK_ODC
#define SPICS_ODC BP_CS_ODC
Running this on my v3a hardware seems to work as expected - with a suitable
Vpu, I can get MOSI to around 5 volts.
Original issue reported on code.google.com by mich...@procter.org.uk on 6 Nov 2011 at 1:51
Original issue reported on code.google.com by
mich...@procter.org.ukon 6 Nov 2011 at 1:51