espressif/esp-idf
1
0
Fork 1
mirror of https://github.com/espressif/esp-idf.git synced 2025-10-04 02:50:58 +02:00
Code Issues Packages Projects Releases Wiki Activity

SPI: Small fixes according to MR comments

Browse Source
This commit is contained in:
Jeroen Domburg
2017-04-13 11:14:35 +08:00
parent e9c372bc2d
commit 4c06dca15c
11 changed files with 73 additions and 69 deletions
Download Patch File Download Diff File Expand all files Collapse all files

8
docs/api/peripherals/spi_slave.rst
View File

@@ -47,7 +47,7 @@ starts sending out clock pulses on the CLK line: every clock pulse causes a data
the master to the slave on the MOSI line and vice versa on the MISO line. At the end of the transaction,
the master makes CS high again.
Using the spi_master driver
Using the spi_slave driver
^^^^^^^^^^^^^^^^^^^^^^^^^^^
- Initialize a SPI peripheral as a slave by calling ``spi_slave_initialize``. Make sure to set the
@@ -79,9 +79,9 @@ case the length of the transmission is larger than the buffer length, only the s
will be sent and received. In case the transmission length is shorter than the buffer length, only data up
to the length of the buffer will be exchanged.
Warning: Due to a design peculiarity in the V0 and V1 silicon of the ESP32, if the amount of bytes sent
by the master or the length of the transmission sent to the slave driver is not both larger than eight and
dividable by four, the SPI hardware can fail to write the last one to seven bytes to the receive buffer.
Warning: Due to a design peculiarity in the ESP32, if the amount of bytes sent by the master or the length
of the transmission queues in the slave driver, in bytes, is not both larger than eight and dividable by
four, the SPI hardware can fail to write the last one to seven bytes to the receive buffer.
Application Example