AVR ISP adapter (avr109/910 compatible, using ATmega16)
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/***************************************************************************
* Copyright (C) 2006 - 2020 by Olaf Rempel *
* razzor AT kopf MINUS tisch DOT de *
* *
* 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; version 2 of the License, *
* *
* 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., *
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
***************************************************************************/
#include <avr/io.h>
#include "target.h"
#include "uart.h"
#define UART_CALC_BAUDRATE(baudRate) (((uint32_t)F_CPU) / (((uint32_t)baudRate)*16) -1)
/* ***********************************************************************
* uart_send
* *********************************************************************** */
void uart_send(uint8_t data)
{
#if defined(__AVR_ATmega16__)
loop_until_bit_is_set(UCSRA, UDRE);
UDR = data;
#elif defined(__AVR_ATmega328P__)
loop_until_bit_is_set(UCSR0A, UDRE0);
UDR0 = data;
#endif
} /* uart_send */
/* ***********************************************************************
* uart_recv
* *********************************************************************** */
uint8_t uart_recv(void)
{
#if defined(__AVR_ATmega16__)
loop_until_bit_is_set(UCSRA, RXC);
return UDR;
#elif defined(__AVR_ATmega328P__)
loop_until_bit_is_set(UCSR0A, RXC0);
return UDR0;
#endif
} /* uart_recv */
/* ***********************************************************************
* uart_rx_ready
* *********************************************************************** */
uint8_t uart_rx_ready(void)
{
#if defined(__AVR_ATmega16__)
return ((UCSRA & (1<<RXC)) == (1<<RXC));
#elif defined(__AVR_ATmega328P__)
return ((UCSR0A & (1<<RXC0)) == (1<<RXC0));
#endif
} /* uart_rx_ready */
/* ***********************************************************************
* uart_send_buf
* *********************************************************************** */
void uart_send_buf(const uint8_t * p_data, uint16_t data_length)
{
while (data_length--)
{
uart_send(*p_data++);
}
} /* uart_send_buf */
/* ***********************************************************************
* uart_recv_buf
* *********************************************************************** */
void uart_recv_buf(uint8_t * p_data, uint16_t data_length)
{
while (data_length--)
{
*p_data++ = uart_recv();
}
} /* uart_recv_buf */
/* ***********************************************************************
* uart_init
* *********************************************************************** */
void uart_init(void)
{
#if defined(OSCCAL_VALUE)
OSCCAL = OSCCAL_VALUE;
#endif /* defined(OSCCAL_VALUE) */
#if defined(__AVR_ATmega16__)
/* Set baud rate */
UBRRH = (UART_CALC_BAUDRATE(BAUDRATE)>>8) & 0xFF;
UBRRL = (UART_CALC_BAUDRATE(BAUDRATE) & 0xFF);
/* enable usart with 8n1 */
UCSRB = (1<<TXEN) | (1<<RXEN);
UCSRC = (1<<URSEL) | (1<<UCSZ1) | (1<<UCSZ0);
#elif defined(__AVR_ATmega328P__)
/* Set baud rate */
UBRR0H = (UART_CALC_BAUDRATE(BAUDRATE)>>8) & 0xFF;
UBRR0L = (UART_CALC_BAUDRATE(BAUDRATE) & 0xFF);
/* enable usart with 8n1 */
UCSR0B = (1<<TXEN0) | (1<<RXEN0);
UCSR0C = (1<<UCSZ01) | (1<<UCSZ00);
#endif
} /* uart_init */