/******************************************************************
* Copyright (C) 2009 Ram Narula
* Filename: Serial.cpp
* Version: 0.11
* Date: 14 July 2009
* Information: http://www.xduino.com/
******************************************************************/
/******************************************************************
* This file is part of Xduino
*
* Xduino is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Xduino is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with Xduino. If not, see .
******************************************************************/
extern "C" {
#include "stm32f10x_lib.h"
}
#include "Serial.h"
#include "doGPIO.h"
Serial::Serial(u8 port_,u32 Baudrate_) : port(port_),Baudrate(Baudrate_)
{
USART_TypeDef* UxARTx;
//Initialize RCC and GPIO modes for both Rx and Tx pins
switch(port)
{
case 1:
UxARTx=USART1;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE);
doGPIO(GPIOA,GPIO_Pin_10,GPIO_Mode_IN_FLOATING);
doGPIO(GPIOA,GPIO_Pin_9,GPIO_Mode_AF_PP);
break;
case 2:
UxARTx=USART2;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB1Periph_USART2, ENABLE);
doGPIO(GPIOA,GPIO_Pin_3,GPIO_Mode_IN_FLOATING);
doGPIO(GPIOA,GPIO_Pin_2,GPIO_Mode_AF_PP);
break;
case 3:
UxARTx=USART3;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB1Periph_USART3, ENABLE);
doGPIO(GPIOB,GPIO_Pin_11,GPIO_Mode_IN_FLOATING);
doGPIO(GPIOB,GPIO_Pin_10,GPIO_Mode_AF_PP);
break;
case 4:
UxARTx=UART4;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB1Periph_UART4, ENABLE);
doGPIO(GPIOC,GPIO_Pin_11,GPIO_Mode_IN_FLOATING);
doGPIO(GPIOC,GPIO_Pin_10,GPIO_Mode_AF_PP);
break;
case 5:
UxARTx=UART5;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB1Periph_UART5, ENABLE);
doGPIO(GPIOD,GPIO_Pin_2,GPIO_Mode_IN_FLOATING);
doGPIO(GPIOC,GPIO_Pin_12,GPIO_Mode_AF_PP);
break;
default:
UxARTx=USART1;
}
USART_InitTypeDef USART_InitStructure;
/*RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE); // start GPIO clock
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE); // start UxART clock
doGPIO(GPIOA,GPIO_Pin_10,GPIO_Mode_IN_FLOATING); // USART1 Rx GPIOA pin 10
doGPIO(GPIOA,GPIO_Pin_9,GPIO_Mode_AF_PP); // USART1 Tx GPIOA Pin 9 */
// USART1 Baudrate 8N1 no hardware flow control
USART_InitStructure.USART_BaudRate = Baudrate;
USART_InitStructure.USART_WordLength = USART_WordLength_8b;
USART_InitStructure.USART_StopBits = USART_StopBits_1;
USART_InitStructure.USART_Parity = USART_Parity_No ;
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
// USART_InitStructure.USART_CPOL = USART_CPOL_Low;
// USART_InitStructure.USART_CPHA = USART_CPHA_2Edge;
// USART_InitStructure.USART_LastBit = USART_LastBit_Disable;
USART_Init(UxARTx, &USART_InitStructure);
USART_Cmd(UxARTx, ENABLE); // and finally start USART1
}
u16 Serial::print(u16 w)
{
while (!(USART1->SR & USART_FLAG_TXE));
return(USART1->DR = (w & 0x1FF)); //upto 9 bits
}
void Serial::print(char *s)
{
while(*s) // Check for end of string
{
print(*s++);
}
}
void Serial::println(char *s)
{
print(s);
print("\r\n");
}
char Serial::read(void)
{
while (!(USART1->SR & USART_FLAG_RXNE));
return (USART1->DR & 0xFF); //upto 8 bits
}
u16 Serial::getdata(void)
{
while (!(USART1->SR & USART_FLAG_RXNE));
return ((u16)(USART1->DR & 0x1FF)); //upto 9 bits
}
bool Serial::available(void)
{
return (bool)(USART1->SR & USART_FLAG_RXNE);
}