Diff: AsyncSerial.cpp

Revision:

0:907ac3c2fadc

Child:

1:d3af33dfc87d

--- /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;
+}
+