mirror of https://github.com/g4klx/MMDVM.git
91 lines
2.0 KiB
C++
91 lines
2.0 KiB
C++
/*
|
|
* Copyright (c) 2020 by Jonathan Naylor G4KLX
|
|
* Copyright (c) 2020 by Geoffrey Merck F4FXL - KC3FRA
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program 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 General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
*/
|
|
|
|
#if defined(STM32F4XX) || defined(STM32F7XX)
|
|
#if !defined(STMUART_H)
|
|
#define STMUART_H
|
|
|
|
#if defined(STM32F4XX)
|
|
#include "stm32f4xx.h"
|
|
#elif defined(STM32F7XX)
|
|
#include "stm32f7xx.h"
|
|
#endif
|
|
|
|
const uint16_t BUFFER_SIZE = 2048U; //needs to be a power of 2 !
|
|
const uint16_t BUFFER_MASK = BUFFER_SIZE - 1;
|
|
|
|
class CSTMUARTFIFO {
|
|
public:
|
|
CSTMUARTFIFO() :
|
|
m_head(0U),
|
|
m_tail(0U)
|
|
{
|
|
}
|
|
|
|
void put(uint8_t data)
|
|
{
|
|
m_buffer[BUFFER_MASK & (m_head++)] = data;
|
|
}
|
|
|
|
uint8_t get()
|
|
{
|
|
return m_buffer[BUFFER_MASK & (m_tail++)];
|
|
}
|
|
|
|
void reset()
|
|
{
|
|
m_tail = 0U;
|
|
m_head = 0U;
|
|
}
|
|
|
|
bool isEmpty()
|
|
{
|
|
return m_tail == m_head;
|
|
}
|
|
|
|
bool isFull()
|
|
{
|
|
return ((m_head + 1U) & BUFFER_MASK) == (m_tail & BUFFER_MASK);
|
|
}
|
|
|
|
private:
|
|
volatile uint8_t m_buffer[BUFFER_SIZE];
|
|
volatile uint16_t m_head;
|
|
volatile uint16_t m_tail;
|
|
};
|
|
|
|
class CSTMUART {
|
|
public:
|
|
CSTMUART();
|
|
void init(USART_TypeDef* usart);
|
|
void write(const uint8_t * data, uint16_t length);
|
|
uint8_t read();
|
|
void handleIRQ();
|
|
void flush();
|
|
uint16_t available();
|
|
uint16_t availableForWrite();
|
|
|
|
private:
|
|
USART_TypeDef * m_usart;
|
|
CSTMUARTFIFO m_rxFifo;
|
|
CSTMUARTFIFO m_txFifo;
|
|
};
|
|
|
|
#endif
|
|
#endif |