Inherit from Serial and use software buffers for TX and RX. This allows the UART peripherals to operate in a IRQ driven mode. Overrides most (but not all) stdio functions as Serial did
Fork of BufferedSerial by
Diff: BufferedSerial.cpp
- Revision:
- 10:9ee15ae3d1a3
- Parent:
- 8:506247a040bc
- Child:
- 11:779304f9c5d2
--- a/BufferedSerial.cpp Sun Jan 04 23:27:53 2015 +0000 +++ b/BufferedSerial.cpp Wed Jan 07 18:37:11 2015 +0000 @@ -23,11 +23,12 @@ #include "BufferedSerial.h" #include <stdarg.h> -BufferedSerial::BufferedSerial(PinName tx, PinName rx, const char* name) - : SERIAL_BASE(tx, rx) , _rxbuf(2*BUFFEREDSERIAL_MAX_BUFFER_SIZE), _txbuf(2*BUFFEREDSERIAL_MAX_BUFFER_SIZE) +BufferedSerial::BufferedSerial(PinName tx, PinName rx, uint32_t buf_size, uint32_t tx_multiple, const char* name) + : SERIAL_BASE(tx, rx) , _rxbuf(buf_size), _txbuf((uint32_t)(tx_multiple*buf_size)) { SERIAL_BASE::attach(this, &BufferedSerial::rxIrq, Serial::RxIrq); - + this->_buf_size = buf_size; + this->_tx_multiple = tx_multiple; return; } @@ -80,20 +81,21 @@ int BufferedSerial::printf(const char* format, ...) { - memset(this->_buffer,0,BUFFEREDSERIAL_MAX_BUFFER_SIZE+1); + char buffer[this->_buf_size]; + memset(buffer,0,this->_buf_size); int r = 0; va_list arg; va_start(arg, format); - r = vsprintf(this->_buffer, format, arg); + r = vsprintf(buffer, format, arg); // this may not hit the heap but should alert the user anyways - if(r > BUFFEREDSERIAL_MAX_BUFFER_SIZE) { - error("%s %d buffer overwrite (max_buf_size: %d exceeded: %d)!\r\n", __FILE__, __LINE__,BUFFEREDSERIAL_MAX_BUFFER_SIZE,r); + if(r > this->_buf_size) { + error("%s %d buffer overwrite (max_buf_size: %d exceeded: %d)!\r\n", __FILE__, __LINE__,this->_buf_size,r); va_end(arg); return 0; } va_end(arg); - r = BufferedSerial::write(this->_buffer, r); + r = BufferedSerial::write(buffer, r); return r; }