Richard Osterloh / SerialDriver

RTOS safe buffered serial driver

Fork of SerialDriver by BlazeX .

Examples/Example_Blocking.cpp@1:1464146bd7fb, 2015-01-15 (annotated)

Committer:
BlazeX
Date:
Thu Jan 15 09:00:48 2015 +0000
Revision:
1:1464146bd7fb
Parent:
0:cd0d79be0c1a 
Fixed Dependencies.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
BlazeX 0:cd0d79be0c1a 1 /// @file Example_Blocking.cpp
BlazeX 0:cd0d79be0c1a 2 /// @brief Test blocking write / read
BlazeX 0:cd0d79be0c1a 3 ///
BlazeX 0:cd0d79be0c1a 4 /// - Uses SerialDriver with USBTX and USBRX.
BlazeX 0:cd0d79be0c1a 5 /// - Has much too small buffers, to how far can it get?
BlazeX 0:cd0d79be0c1a 6 ///
BlazeX 0:cd0d79be0c1a 7 /// - Testing how much bytes were transmitted, with too small TX buffer and forced non blocking
BlazeX 0:cd0d79be0c1a 8 /// - Waiting till 10 bytes are received
BlazeX 0:cd0d79be0c1a 9 /// - LED4 indicates parallel thread working
BlazeX 0:cd0d79be0c1a 10 ///
BlazeX 0:cd0d79be0c1a 11
BlazeX 0:cd0d79be0c1a 12 #if 0
BlazeX 0:cd0d79be0c1a 13
BlazeX 0:cd0d79be0c1a 14 #include "SerialDriver.h"
BlazeX 0:cd0d79be0c1a 15
BlazeX 0:cd0d79be0c1a 16 SerialDriver pc(USBTX, USBRX, 4, 32);
BlazeX 0:cd0d79be0c1a 17
BlazeX 0:cd0d79be0c1a 18 // This thread is running in parallel
BlazeX 0:cd0d79be0c1a 19 DigitalOut led4(LED4);
BlazeX 0:cd0d79be0c1a 20 void parallel(void const * argument)
BlazeX 0:cd0d79be0c1a 21 {
BlazeX 0:cd0d79be0c1a 22 while(1)
BlazeX 0:cd0d79be0c1a 23 {
BlazeX 0:cd0d79be0c1a 24 Thread::wait(20);
BlazeX 0:cd0d79be0c1a 25 led4= !led4;
BlazeX 0:cd0d79be0c1a 26 }
BlazeX 0:cd0d79be0c1a 27 }
BlazeX 0:cd0d79be0c1a 28
BlazeX 0:cd0d79be0c1a 29 int main()
BlazeX 0:cd0d79be0c1a 30 {
BlazeX 0:cd0d79be0c1a 31 // Start the other thread
BlazeX 0:cd0d79be0c1a 32 Thread parallelTask(&parallel);
BlazeX 0:cd0d79be0c1a 33
BlazeX 0:cd0d79be0c1a 34
BlazeX 0:cd0d79be0c1a 35 const char * completeText= "This is a complete text. How much will you receive?";
BlazeX 0:cd0d79be0c1a 36 const int completeTextLength= strlen(completeText);
BlazeX 0:cd0d79be0c1a 37 int writtenBytes;
BlazeX 0:cd0d79be0c1a 38
BlazeX 0:cd0d79be0c1a 39
BlazeX 0:cd0d79be0c1a 40 const int readBufferLength= 10;
BlazeX 0:cd0d79be0c1a 41 unsigned char readBuffer[readBufferLength];
BlazeX 0:cd0d79be0c1a 42 int receivedBytes= 0;
BlazeX 0:cd0d79be0c1a 43
BlazeX 0:cd0d79be0c1a 44 while(1)
BlazeX 0:cd0d79be0c1a 45 {
BlazeX 0:cd0d79be0c1a 46 // write non blocking, how much get transmitted?
BlazeX 0:cd0d79be0c1a 47 writtenBytes= pc.write((const unsigned char*)completeText, completeTextLength, false);
BlazeX 0:cd0d79be0c1a 48
BlazeX 0:cd0d79be0c1a 49 // now print the result
BlazeX 0:cd0d79be0c1a 50 pc.printf("\r\nOnly %i of %i bytes were transmitted using non blocking write.\r\n", writtenBytes, completeTextLength);
BlazeX 0:cd0d79be0c1a 51
BlazeX 0:cd0d79be0c1a 52
BlazeX 0:cd0d79be0c1a 53 // wait for 10 bytes
BlazeX 0:cd0d79be0c1a 54 pc.printf("I wait for my 10 bytes. Send them!\r\n", writtenBytes, completeTextLength);
BlazeX 0:cd0d79be0c1a 55 receivedBytes+= pc.read(readBuffer, readBufferLength);
BlazeX 0:cd0d79be0c1a 56
BlazeX 0:cd0d79be0c1a 57 // now print result
BlazeX 0:cd0d79be0c1a 58 pc.printf("Received %i bytes since start.\r\n\r\n", receivedBytes);
BlazeX 0:cd0d79be0c1a 59
BlazeX 0:cd0d79be0c1a 60
BlazeX 0:cd0d79be0c1a 61 // wait a bit
BlazeX 0:cd0d79be0c1a 62 Thread::wait(1000);
BlazeX 0:cd0d79be0c1a 63 }
BlazeX 0:cd0d79be0c1a 64 }
BlazeX 0:cd0d79be0c1a 65
BlazeX 0:cd0d79be0c1a 66 #endif