Buffered Serial Port Driver for RTOS
Dependents: nucleo_cannonball PiballNeoController
Buffered Serial Port Driver for RTOS
- ISR driven, ring buffered IO operation
- IO operations are idle waiting, don't waste time in RTOS :D
- Can use external buffers
- Based on mbed RawSerial
Example
SerialDriver Example
#include "SerialDriver.h" SerialDriver pc(USBTX, USBRX); int main() { // setup serial port pc.baud(9600); // print some text pc.puts("This is just a string.\r\n"); pc.printf("But this is a %s with integer %i and float %f.\r\n", "formatted text", 123, 0.456f); // now lets behave like a null modem while(1) pc.putc(pc.getc()); }
Look at the API Documentation for more Examples.
Dependencies
Import librarymbed
The official Mbed 2 C/C++ SDK provides the software platform and libraries to build your applications.
Import librarymbed-rtos
Official mbed Real Time Operating System based on the RTX implementation of the CMSIS-RTOS API open standard.
If you find a bug, please help me to fix it. Send me a message. You can help me a lot: Write a demo program that causes the bug reproducible.
Examples/Example_printf.cpp@8:903a4162a0d1, 2015-10-29 (annotated)
- Committer:
- BlazeX
- Date:
- Thu Oct 29 19:38:11 2015 +0000
- Revision:
- 8:903a4162a0d1
- Parent:
- 1:1464146bd7fb
Beta Update: Could SerialDriver inherit RawSerial rather than SerialBase? Maybe, let's try!
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
BlazeX | 0:cd0d79be0c1a | 1 | /// @file Example_printf.cpp |
BlazeX | 0:cd0d79be0c1a | 2 | /// @brief Formatted output |
BlazeX | 0:cd0d79be0c1a | 3 | /// |
BlazeX | 0:cd0d79be0c1a | 4 | /// - Uses SerialDriver with USBTX and USBRX. |
BlazeX | 0:cd0d79be0c1a | 5 | /// - Has much too small buffers, but printf is blocking, so it does not matter |
BlazeX | 0:cd0d79be0c1a | 6 | /// |
BlazeX | 0:cd0d79be0c1a | 7 | /// - The terminal will be flooded with text |
BlazeX | 0:cd0d79be0c1a | 8 | /// - LED4 indicates parallel thread working |
BlazeX | 0:cd0d79be0c1a | 9 | /// |
BlazeX | 0:cd0d79be0c1a | 10 | |
BlazeX | 0:cd0d79be0c1a | 11 | #if 0 |
BlazeX | 0:cd0d79be0c1a | 12 | |
BlazeX | 0:cd0d79be0c1a | 13 | #include "SerialDriver.h" |
BlazeX | 0:cd0d79be0c1a | 14 | |
BlazeX | 0:cd0d79be0c1a | 15 | // only 4 byte of software ring buffer? |
BlazeX | 0:cd0d79be0c1a | 16 | // No problem! SerialDriver uses idle blocking calls :D |
BlazeX | 0:cd0d79be0c1a | 17 | SerialDriver pc(USBTX, USBRX, 4, 4); |
BlazeX | 0:cd0d79be0c1a | 18 | |
BlazeX | 0:cd0d79be0c1a | 19 | // This thread is running in parallel |
BlazeX | 0:cd0d79be0c1a | 20 | DigitalOut led4(LED4); |
BlazeX | 0:cd0d79be0c1a | 21 | void parallel(void const * argument) |
BlazeX | 0:cd0d79be0c1a | 22 | { |
BlazeX | 0:cd0d79be0c1a | 23 | while(1) |
BlazeX | 0:cd0d79be0c1a | 24 | { |
BlazeX | 0:cd0d79be0c1a | 25 | Thread::wait(20); |
BlazeX | 0:cd0d79be0c1a | 26 | led4= !led4; |
BlazeX | 0:cd0d79be0c1a | 27 | } |
BlazeX | 0:cd0d79be0c1a | 28 | } |
BlazeX | 0:cd0d79be0c1a | 29 | |
BlazeX | 0:cd0d79be0c1a | 30 | int main() |
BlazeX | 0:cd0d79be0c1a | 31 | { |
BlazeX | 0:cd0d79be0c1a | 32 | // Start the other thread |
BlazeX | 0:cd0d79be0c1a | 33 | Thread parallelTask(¶llel); |
BlazeX | 0:cd0d79be0c1a | 34 | |
BlazeX | 0:cd0d79be0c1a | 35 | float f= 0.0f; |
BlazeX | 0:cd0d79be0c1a | 36 | while(1) |
BlazeX | 0:cd0d79be0c1a | 37 | { |
BlazeX | 0:cd0d79be0c1a | 38 | // unformatted text |
BlazeX | 0:cd0d79be0c1a | 39 | pc.puts("Hi! this uses puts.\r\n"); |
BlazeX | 0:cd0d79be0c1a | 40 | |
BlazeX | 0:cd0d79be0c1a | 41 | // formatted text |
BlazeX | 0:cd0d79be0c1a | 42 | pc.printf("And this is formatted. Here is the sin(%f)=%f.\r\n", f, sinf(f)); |
BlazeX | 0:cd0d79be0c1a | 43 | f+= 0.25f; |
BlazeX | 0:cd0d79be0c1a | 44 | } |
BlazeX | 0:cd0d79be0c1a | 45 | } |
BlazeX | 0:cd0d79be0c1a | 46 | |
BlazeX | 0:cd0d79be0c1a | 47 | #endif |