EMTime/libopencm3-examples
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

[README] Renamed all readme files to indicate markup format.

Browse Source
This commit is contained in:
Piotr Esden-Tempski
2015-01-19 19:19:42 -08:00
parent 64761d405b
commit ab7efee88e
120 changed files with 0 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

17
examples/stm32/f1/lisa-m-2/spi_dma/README.md Normal file
View File

@@ -0,0 +1,17 @@
------------------------------------------------------------------------------
README
------------------------------------------------------------------------------
This example program demonstrates SPI transceive with DMA on Lisa/M 2.0 board
(http://paparazzi.enac.fr/wiki/Lisa/M_v20 for details).
The terminal settings for the receiving device/PC are 9600 8n1.
The example expects a loopback connection between the MISO and MOSI pins on
SPI1. The DRDY and SS pins (on the Lisa/M v2.0 SPI1 connector) are used as
GPIO to time the tx and rx ISRs, respectively. Use a scope or logic analyzer.
The tx length is incremented, followed by the rx length, after which both tx
and rx lengths are decremented together. The case where rx is longer than tx
requires greater complexity to ensure all rx data is clocked in. See the adv
example for this.