Asynchronous (Non-blocking) Serial Communication library with variable length software ring buffer (FIFO). You can use RawSerial Library's primary method. Operability confirmed on mbed 2.0.
Dependents: Brute_TS_Controller_2018_11
Diff: AsyncSerial.cpp
- Revision:
- 0:907ac3c2fadc
- Child:
- 1:d3af33dfc87d
diff -r 000000000000 -r 907ac3c2fadc AsyncSerial.cpp --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/AsyncSerial.cpp Thu Mar 30 02:18:24 2017 +0000 @@ -0,0 +1,172 @@ +// -*- coding: utf-8 -*- +/** + @file AsyncSerial.cpp + @brief Asynchronous (Non-brocking) Serial Communication library with variable length software ring buffer (FIFO). You can use also RawSerial Library's method. You can set the baudrate of the serial communication when instantiating. + + @author T.Kawamura + @version 1.0 + @date 2017-03-29 T.Kawamura Written for C++/mbed. + + @see + Copyright (C) 2017 T.Kawamura. + Released under the MIT license. + http://opensource.org/licenses/mit-license.php + +*/ + +#include "AsyncSerial.hpp" + +AsyncSerial::AsyncSerial(PinName txpin, PinName rxpin, uint32_t baudrate, uint32_t buffer_size) : RawSerial(txpin, rxpin, baudrate), fifo_tx(buffer_size), fifo_rx(buffer_size){ + //Initialize ISR + RawSerial::attach(this, &AsyncSerial::ISR_TX, RawSerial::TxIrq); + RawSerial::attach(this, &AsyncSerial::ISR_RX, RawSerial::RxIrq); + + fifo_tx.clear(); + fifo_rx.clear(); + + Is_Serial_Sending = false; + + return; +} + +AsyncSerial::~AsyncSerial(){ + RawSerial::attach(NULL, RawSerial::TxIrq); + RawSerial::attach(NULL, RawSerial::RxIrq); + + return; +} + +void AsyncSerial::ISR_TX(void){ + int data; + + if( fifo_tx.available() > 0 ){ + data = (int)fifo_tx.get(); + RawSerial::putc(data); + }else{ + Is_Serial_Sending = false; + } +} + +void AsyncSerial::ISR_RX(void){ + uint8_t data; + + data = (uint8_t)RawSerial::getc(); + fifo_rx.put(data); +} + +uint32_t AsyncSerial::readable(void){ + return fifo_rx.available(); +} + +uint8_t AsyncSerial::writeable(void){ + return 1; +} + +uint8_t AsyncSerial::getc(void){ + return fifo_rx.get(); +} + +uint8_t AsyncSerial::peekc(void){ + return fifo_rx.peek(); +} + +uint8_t AsyncSerial::putc(uint8_t data){ + uint8_t status; + + if( Is_Serial_Sending ){ + status = fifo_tx.put(data); + if( status != 0 ){ + return 1; + }else{ + return 0; + } + }else{ + Is_Serial_Sending = true; + RawSerial::putc((int)data); + } + return 1; +} + +uint8_t AsyncSerial::puts(const char *str){ + uint8_t temp, status = 0; + + for(uint16_t i = 0; i < strlen(str); i++){ + temp = (uint8_t)str[i]; + status = fifo_tx.put(temp); + } + + if( !Is_Serial_Sending ){ + Is_Serial_Sending = true; + RawSerial::putc((int)fifo_tx.get()); + } + + if( status == 0 ){ + return 0; + } + + AsyncSerial::putc('\n'); + return 1; +} + +uint16_t AsyncSerial::printf(const char *format, ...){ + int32_t wrote_length = 0; + char string_buffer[PRINTF_STRING_BUFFER_SIZE]; + + memset(string_buffer, 0, PRINTF_STRING_BUFFER_SIZE); + + va_list arg; + va_start(arg, format); + wrote_length = vsprintf(string_buffer, format, arg); + + if( wrote_length > PRINTF_STRING_BUFFER_SIZE ) { + error("%s @ %d : String is too large, string buffer overwrite. (Max buffer size: %d Wrote length: %d)\n", __FILE__, __LINE__, PRINTF_STRING_BUFFER_SIZE, wrote_length); + va_end(arg); + return 0; + } + + if( wrote_length < 0 ){ + va_end(arg); + error("Function vsprintf() was failed."); + return 0; + } + + va_end(arg); + wrote_length = AsyncSerial::write((uint8_t*)string_buffer, wrote_length); + + return (uint16_t)wrote_length; +} + +uint8_t AsyncSerial::write(const uint8_t *s, uint16_t length){ + uint8_t temp, status; + + if ( length < 1 ){ + return 0; + } + + for(uint16_t i = 0; i < length; i++){ + temp = (uint8_t)s[i]; + status = fifo_tx.put(temp); + } + + if( !Is_Serial_Sending ){ + Is_Serial_Sending = true; + RawSerial::putc((int)fifo_tx.get()); + } + + if( status == 0 ){ + return 0; + } + + return 1; +} + +void AsyncSerial::flush(void){ + fifo_rx.clear(); + return; +} + +void AsyncSerial::wait(void){ + while( fifo_rx.available() > 0 ){} + return; +} +