Richard Sewell
This is the SerialBuffered class, which wraps Serial and adds interrupt-powered buffered reading (so it will catch inbound data even when your app is busy doing something else) and simple read timeouts. There's a tiny demo app in there too.
main.cpp@0:b55ca3bb8017, 2009-11-18 (annotated)
- Committer:
- jarkman
- Date:
- Wed Nov 18 21:27:15 2009 +0000
- Revision:
- 0:b55ca3bb8017
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| jarkman | 0:b55ca3bb8017 | 1 | #include "mbed.h" |
| jarkman | 0:b55ca3bb8017 | 2 | #include "SerialBuffered.h" |
| jarkman | 0:b55ca3bb8017 | 3 | |
| jarkman | 0:b55ca3bb8017 | 4 | Serial loggerSerial(USBTX, USBRX); |
| jarkman | 0:b55ca3bb8017 | 5 | |
| jarkman | 0:b55ca3bb8017 | 6 | // run this with p13 joined to p14 to test the SerialBuffered class |
| jarkman | 0:b55ca3bb8017 | 7 | |
| jarkman | 0:b55ca3bb8017 | 8 | int main() { |
| jarkman | 0:b55ca3bb8017 | 9 | |
| jarkman | 0:b55ca3bb8017 | 10 | SerialBuffered *b = new SerialBuffered( 1001, p13, p14); |
| jarkman | 0:b55ca3bb8017 | 11 | |
| jarkman | 0:b55ca3bb8017 | 12 | b->baud( 112500 ); |
| jarkman | 0:b55ca3bb8017 | 13 | b->setTimeout( 0.1 ); |
| jarkman | 0:b55ca3bb8017 | 14 | |
| jarkman | 0:b55ca3bb8017 | 15 | // write a bufferful |
| jarkman | 0:b55ca3bb8017 | 16 | for( int i = 0; i < 1000; i ++ ) |
| jarkman | 0:b55ca3bb8017 | 17 | { |
| jarkman | 0:b55ca3bb8017 | 18 | b->putc( i % 0xff ); |
| jarkman | 0:b55ca3bb8017 | 19 | } |
| jarkman | 0:b55ca3bb8017 | 20 | |
| jarkman | 0:b55ca3bb8017 | 21 | // and check it all arrived |
| jarkman | 0:b55ca3bb8017 | 22 | for( int i = 0; i < 1000; i ++ ) |
| jarkman | 0:b55ca3bb8017 | 23 | { |
| jarkman | 0:b55ca3bb8017 | 24 | uint8_t j = b->getc(); |
| jarkman | 0:b55ca3bb8017 | 25 | if( j != i % 0xff ) |
| jarkman | 0:b55ca3bb8017 | 26 | { |
| jarkman | 0:b55ca3bb8017 | 27 | loggerSerial.printf("Bad byte %x at %x\r\n", j, i ); |
| jarkman | 0:b55ca3bb8017 | 28 | break; |
| jarkman | 0:b55ca3bb8017 | 29 | } |
| jarkman | 0:b55ca3bb8017 | 30 | |
| jarkman | 0:b55ca3bb8017 | 31 | } |
| jarkman | 0:b55ca3bb8017 | 32 | |
| jarkman | 0:b55ca3bb8017 | 33 | // write another bufferful |
| jarkman | 0:b55ca3bb8017 | 34 | for( int i = 0; i < 1000; i ++ ) |
| jarkman | 0:b55ca3bb8017 | 35 | { |
| jarkman | 0:b55ca3bb8017 | 36 | b->putc( i % 0xff ); |
| jarkman | 0:b55ca3bb8017 | 37 | } |
| jarkman | 0:b55ca3bb8017 | 38 | |
| jarkman | 0:b55ca3bb8017 | 39 | // and check it arrived too, to confirm the circular buffer is working |
| jarkman | 0:b55ca3bb8017 | 40 | for( int i = 0; i < 1000; i ++ ) |
| jarkman | 0:b55ca3bb8017 | 41 | { |
| jarkman | 0:b55ca3bb8017 | 42 | uint8_t j = b->getc(); |
| jarkman | 0:b55ca3bb8017 | 43 | if( j != i % 0xff ) |
| jarkman | 0:b55ca3bb8017 | 44 | { |
| jarkman | 0:b55ca3bb8017 | 45 | loggerSerial.printf("Bad byte %x at %x\r\n", j, i ); |
| jarkman | 0:b55ca3bb8017 | 46 | break; |
| jarkman | 0:b55ca3bb8017 | 47 | } |
| jarkman | 0:b55ca3bb8017 | 48 | } |
| jarkman | 0:b55ca3bb8017 | 49 | |
| jarkman | 0:b55ca3bb8017 | 50 | // write another bufferful, deliberately short |
| jarkman | 0:b55ca3bb8017 | 51 | for( int i = 0; i < 999; i ++ ) |
| jarkman | 0:b55ca3bb8017 | 52 | { |
| jarkman | 0:b55ca3bb8017 | 53 | b->putc( i % 0xff ); |
| jarkman | 0:b55ca3bb8017 | 54 | } |
| jarkman | 0:b55ca3bb8017 | 55 | |
| jarkman | 0:b55ca3bb8017 | 56 | |
| jarkman | 0:b55ca3bb8017 | 57 | // and read it back with readBytes |
| jarkman | 0:b55ca3bb8017 | 58 | b->setTimeout( 5 ); // set a long timeout so we can see we are waiting for it |
| jarkman | 0:b55ca3bb8017 | 59 | |
| jarkman | 0:b55ca3bb8017 | 60 | |
| jarkman | 0:b55ca3bb8017 | 61 | uint8_t *buff = (uint8_t*) malloc( 1000 ); |
| jarkman | 0:b55ca3bb8017 | 62 | int nRead = b->readBytes( buff, 1000 ); |
| jarkman | 0:b55ca3bb8017 | 63 | |
| jarkman | 0:b55ca3bb8017 | 64 | loggerSerial.printf("readBytes got %d\r\n", nRead ); |
| jarkman | 0:b55ca3bb8017 | 65 | |
| jarkman | 0:b55ca3bb8017 | 66 | loggerSerial.printf("Done\r\n"); |
| jarkman | 0:b55ca3bb8017 | 67 | } |