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
AsyncSerial.cpp
- Committer:
- babylonica
- Date:
- 2017-03-30
- Revision:
- 0:907ac3c2fadc
- Child:
- 1:d3af33dfc87d
File content as of revision 0:907ac3c2fadc:
// -*- 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; }