0,0 → 1,54 |
/**************************************************************************** |
* Copyright (C) 2009-2010 by Claas Anders "CaScAdE" Rathje * |
* admiralcascade@gmail.com * |
* Project-URL: http://www.mylifesucks.de/oss/c-strom/ * |
* * |
* 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. * |
* * |
* 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. * |
****************************************************************************/ |
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/**************************************************************************** |
* * |
* Most of the i²c/twi code is originally from * |
* http://www.rn-wissen.de/index.php/TWI_Slave_mit_avr-gcc * |
* * |
****************************************************************************/ |
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#define I2C_BUFFER_SIZE 10 |
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// ACK |
#define TWCR_ACK TWCR = (1<<TWEN)|(1<<TWIE)|(1<<TWINT)|(1<<TWEA)|(0<<TWSTA)|(0<<TWSTO)|(0<<TWWC); |
// NACK |
#define TWCR_NACK TWCR = (1<<TWEN)|(1<<TWIE)|(1<<TWINT)|(0<<TWEA)|(0<<TWSTA)|(0<<TWSTO)|(0<<TWWC); |
// non addressed slave mode |
#define TWCR_RESET TWCR = (1<<TWEN)|(1<<TWIE)|(1<<TWINT)|(1<<TWEA)|(0<<TWSTA)|(0<<TWSTO)|(0<<TWWC); |
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#define CSTROM_I2C 0b00100000 // = 0x20 = 32 |
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volatile uint8_t i2c_rx_buffer[I2C_BUFFER_SIZE]; |
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// here we use the same for SPI and TWI |
extern union SPI_buffer_t SPI_buffer; |
#define i2c_tx_buffer SPI_buffer.buffer.c |
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// otherwise take this |
//volatile uint8_t i2c_tx_buffer[I2C_BUFFER_SIZE]; |
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volatile uint8_t i2c_buf_adr; |
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void init_twi_slave (uint8_t); |