From 1393707ee451a3ad9a1c00c3c50da64705be52ad Mon Sep 17 00:00:00 2001 From: Jeff Epler Date: Tue, 9 Feb 2021 10:03:20 -0600 Subject: [PATCH] add a note about sharing the SPI bus with SD cards and other devices --- README.rst | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/README.rst b/README.rst index 94b9287..aa3d4f0 100644 --- a/README.rst +++ b/README.rst @@ -57,6 +57,16 @@ select (cs) connections. with open("/sd/test.txt", "w") as f: f.write("Hello world\n") +Sharing the SPI bus with other devices +====================================== + +.. important:: + If the same SPI bus is shared with other peripherals, it is important that + the SD card be initialized before accessing any other peripheral on the bus. + Failure to do so can prevent the SD card from being recognized until it is + powered off or re-inserted. + + Contributing ============