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Diffstat (limited to 'demos/STM32/RT-STM32F429-DISCOVERY-TRIBUF/readme.txt')
| -rw-r--r-- | demos/STM32/RT-STM32F429-DISCOVERY-TRIBUF/readme.txt | 29 |
1 files changed, 16 insertions, 13 deletions
diff --git a/demos/STM32/RT-STM32F429-DISCOVERY-TRIBUF/readme.txt b/demos/STM32/RT-STM32F429-DISCOVERY-TRIBUF/readme.txt index 7a0b396..cc7f406 100644 --- a/demos/STM32/RT-STM32F429-DISCOVERY-TRIBUF/readme.txt +++ b/demos/STM32/RT-STM32F429-DISCOVERY-TRIBUF/readme.txt @@ -8,20 +8,23 @@ The demo runs on an ST STM32F429I-Discovery board. ** The Demo ** -A simple command shell is activated on virtual serial port SD1. -TODO +This demo shows how to use a triple buffer handler, with one writer thread and +one reader thread. +The writer thread puts a character into the current back buffer, thus swapping +the back buffer with the orphan buffer for a new write. The writer then sleeps +for a specified delay in milliseconds. +The reader thread gets waits (if there is a timeout) until the orphan buffer +contains available data, becoming the new front buffer. The character is read +from the new front buffer and printed. The reader then sleeps for a specified +delay in milliseconds. +A simple command shell is activated on virtual serial port SD1 or SDU1. +Via command line it is possible to start, stop, set the delay, and set the +thread priority of the reader and writer threads. +The reader can also be assigned a wait timeout in milliseconds, with special +cases of "*" for infinite timeout, and "-" (or 0 ms) for none. ** Build Procedure ** -The demo has been tested by using the free Codesourcery GCC-based toolchain -and YAGARTO. just modify the TRGT line in the makefile in order to use +The demo has been tested by using the free GNU Tools ARM Embedded toolchain +and ChibiStudio. Just modify the TRGT line in the makefile in order to use different GCC toolchains. - -** Notes ** - -Some files used by the demo are not part of ChibiOS/RT but are copyright of -ST Microelectronics and are licensed under a different license. -Also note that not all the files present in the ST library are distributed -with ChibiOS/RT, you can find the whole library on the ST web site: - - http://www.st.com |