qmk

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commit 478538e0d9938952568c62d135166d2cba15a70c
parent 438386401f29cb3b543d0439dabc7f9747a61483
Author: seebs <github@seebs.net>
Date:   Sat, 26 Jan 2019 13:17:16 -0600

[Keyboard] drop unused i2c files (#4948)

The Ergodox EZ used to use twimaster.c/i2cmaster.h, but now uses
a standard centralized AVR i2c driver. Drop the now-unused files.
Diffstat:
keyboards/ergodox_ez/i2cmaster.h | 178-------------------------------------------------------------------------------
keyboards/ergodox_ez/twimaster.c | 208-------------------------------------------------------------------------------
2 files changed, 0 insertions(+), 386 deletions(-)

diff --git a/keyboards/ergodox_ez/i2cmaster.h b/keyboards/ergodox_ez/i2cmaster.h @@ -1,178 +0,0 @@ -#ifndef _I2CMASTER_H -#define _I2CMASTER_H 1 -/************************************************************************* -* Title: C include file for the I2C master interface -* (i2cmaster.S or twimaster.c) -* Author: Peter Fleury <pfleury@gmx.ch> http://jump.to/fleury -* File: $Id: i2cmaster.h,v 1.10 2005/03/06 22:39:57 Peter Exp $ -* Software: AVR-GCC 3.4.3 / avr-libc 1.2.3 -* Target: any AVR device -* Usage: see Doxygen manual -**************************************************************************/ - -#ifdef DOXYGEN -/** - @defgroup pfleury_ic2master I2C Master library - @code #include <i2cmaster.h> @endcode - - @brief I2C (TWI) Master Software Library - - Basic routines for communicating with I2C slave devices. This single master - implementation is limited to one bus master on the I2C bus. - - This I2c library is implemented as a compact assembler software implementation of the I2C protocol - which runs on any AVR (i2cmaster.S) and as a TWI hardware interface for all AVR with built-in TWI hardware (twimaster.c). - Since the API for these two implementations is exactly the same, an application can be linked either against the - software I2C implementation or the hardware I2C implementation. - - Use 4.7k pull-up resistor on the SDA and SCL pin. - - Adapt the SCL and SDA port and pin definitions and eventually the delay routine in the module - i2cmaster.S to your target when using the software I2C implementation ! - - Adjust the CPU clock frequence F_CPU in twimaster.c or in the Makfile when using the TWI hardware implementaion. - - @note - The module i2cmaster.S is based on the Atmel Application Note AVR300, corrected and adapted - to GNU assembler and AVR-GCC C call interface. - Replaced the incorrect quarter period delays found in AVR300 with - half period delays. - - @author Peter Fleury pfleury@gmx.ch http://jump.to/fleury - - @par API Usage Example - The following code shows typical usage of this library, see example test_i2cmaster.c - - @code - - #include <i2cmaster.h> - - - #define Dev24C02 0xA2 // device address of EEPROM 24C02, see datasheet - - int main(void) - { - unsigned char ret; - - i2c_init(); // initialize I2C library - - // write 0x75 to EEPROM address 5 (Byte Write) - i2c_start_wait(Dev24C02+I2C_WRITE); // set device address and write mode - i2c_write(0x05); // write address = 5 - i2c_write(0x75); // write value 0x75 to EEPROM - i2c_stop(); // set stop conditon = release bus - - - // read previously written value back from EEPROM address 5 - i2c_start_wait(Dev24C02+I2C_WRITE); // set device address and write mode - - i2c_write(0x05); // write address = 5 - i2c_rep_start(Dev24C02+I2C_READ); // set device address and read mode - - ret = i2c_readNak(); // read one byte from EEPROM - i2c_stop(); - - for(;;); - } - @endcode - -*/ -#endif /* DOXYGEN */ - -/**@{*/ - -#if (__GNUC__ * 100 + __GNUC_MINOR__) < 304 -#error "This library requires AVR-GCC 3.4 or later, update to newer AVR-GCC compiler !" -#endif - -#include <avr/io.h> - -/** defines the data direction (reading from I2C device) in i2c_start(),i2c_rep_start() */ -#define I2C_READ 1 - -/** defines the data direction (writing to I2C device) in i2c_start(),i2c_rep_start() */ -#define I2C_WRITE 0 - - -/** - @brief initialize the I2C master interace. Need to be called only once - @param void - @return none - */ -extern void i2c_init(void); - - -/** - @brief Terminates the data transfer and releases the I2C bus - @param void - @return none - */ -extern void i2c_stop(void); - - -/** - @brief Issues a start condition and sends address and transfer direction - - @param addr address and transfer direction of I2C device - @retval 0 device accessible - @retval 1 failed to access device - */ -extern unsigned char i2c_start(unsigned char addr); - - -/** - @brief Issues a repeated start condition and sends address and transfer direction - - @param addr address and transfer direction of I2C device - @retval 0 device accessible - @retval 1 failed to access device - */ -extern unsigned char i2c_rep_start(unsigned char addr); - - -/** - @brief Issues a start condition and sends address and transfer direction - - If device is busy, use ack polling to wait until device ready - @param addr address and transfer direction of I2C device - @return none - */ -extern void i2c_start_wait(unsigned char addr); - - -/** - @brief Send one byte to I2C device - @param data byte to be transfered - @retval 0 write successful - @retval 1 write failed - */ -extern unsigned char i2c_write(unsigned char data); - - -/** - @brief read one byte from the I2C device, request more data from device - @return byte read from I2C device - */ -extern unsigned char i2c_readAck(void); - -/** - @brief read one byte from the I2C device, read is followed by a stop condition - @return byte read from I2C device - */ -extern unsigned char i2c_readNak(void); - -/** - @brief read one byte from the I2C device - - Implemented as a macro, which calls either i2c_readAck or i2c_readNak - - @param ack 1 send ack, request more data from device<br> - 0 send nak, read is followed by a stop condition - @return byte read from I2C device - */ -extern unsigned char i2c_read(unsigned char ack); -#define i2c_read(ack) (ack) ? i2c_readAck() : i2c_readNak(); - - -/**@}*/ -#endif diff --git a/keyboards/ergodox_ez/twimaster.c b/keyboards/ergodox_ez/twimaster.c @@ -1,208 +0,0 @@ -/************************************************************************* -* Title: I2C master library using hardware TWI interface -* Author: Peter Fleury <pfleury@gmx.ch> http://jump.to/fleury -* File: $Id: twimaster.c,v 1.3 2005/07/02 11:14:21 Peter Exp $ -* Software: AVR-GCC 3.4.3 / avr-libc 1.2.3 -* Target: any AVR device with hardware TWI -* Usage: API compatible with I2C Software Library i2cmaster.h -**************************************************************************/ -#include <inttypes.h> -#include <compat/twi.h> - -#include <i2cmaster.h> - - -/* define CPU frequency in Mhz here if not defined in Makefile */ -#ifndef F_CPU -#define F_CPU 16000000UL -#endif - -/* I2C clock in Hz */ -#define SCL_CLOCK 400000L - - -/************************************************************************* - Initialization of the I2C bus interface. Need to be called only once -*************************************************************************/ -void i2c_init(void) -{ - /* initialize TWI clock - * minimal values in Bit Rate Register (TWBR) and minimal Prescaler - * bits in the TWI Status Register should give us maximal possible - * I2C bus speed - about 444 kHz - * - * for more details, see 20.5.2 in ATmega16/32 secification - */ - - TWSR = 0; /* no prescaler */ - TWBR = 10; /* must be >= 10 for stable operation */ - -}/* i2c_init */ - - -/************************************************************************* - Issues a start condition and sends address and transfer direction. - return 0 = device accessible, 1= failed to access device -*************************************************************************/ -unsigned char i2c_start(unsigned char address) -{ - uint8_t twst; - - // send START condition - TWCR = (1<<TWINT) | (1<<TWSTA) | (1<<TWEN); - - // wait until transmission completed - while(!(TWCR & (1<<TWINT))); - - // check value of TWI Status Register. Mask prescaler bits. - twst = TW_STATUS & 0xF8; - if ( (twst != TW_START) && (twst != TW_REP_START)) return 1; - - // send device address - TWDR = address; - TWCR = (1<<TWINT) | (1<<TWEN); - - // wail until transmission completed and ACK/NACK has been received - while(!(TWCR & (1<<TWINT))); - - // check value of TWI Status Register. Mask prescaler bits. - twst = TW_STATUS & 0xF8; - if ( (twst != TW_MT_SLA_ACK) && (twst != TW_MR_SLA_ACK) ) return 1; - - return 0; - -}/* i2c_start */ - - -/************************************************************************* - Issues a start condition and sends address and transfer direction. - If device is busy, use ack polling to wait until device is ready - - Input: address and transfer direction of I2C device -*************************************************************************/ -void i2c_start_wait(unsigned char address) -{ - uint8_t twst; - - - while ( 1 ) - { - // send START condition - TWCR = (1<<TWINT) | (1<<TWSTA) | (1<<TWEN); - - // wait until transmission completed - while(!(TWCR & (1<<TWINT))); - - // check value of TWI Status Register. Mask prescaler bits. - twst = TW_STATUS & 0xF8; - if ( (twst != TW_START) && (twst != TW_REP_START)) continue; - - // send device address - TWDR = address; - TWCR = (1<<TWINT) | (1<<TWEN); - - // wail until transmission completed - while(!(TWCR & (1<<TWINT))); - - // check value of TWI Status Register. Mask prescaler bits. - twst = TW_STATUS & 0xF8; - if ( (twst == TW_MT_SLA_NACK )||(twst ==TW_MR_DATA_NACK) ) - { - /* device busy, send stop condition to terminate write operation */ - TWCR = (1<<TWINT) | (1<<TWEN) | (1<<TWSTO); - - // wait until stop condition is executed and bus released - while(TWCR & (1<<TWSTO)); - - continue; - } - //if( twst != TW_MT_SLA_ACK) return 1; - break; - } - -}/* i2c_start_wait */ - - -/************************************************************************* - Issues a repeated start condition and sends address and transfer direction - - Input: address and transfer direction of I2C device - - Return: 0 device accessible - 1 failed to access device -*************************************************************************/ -unsigned char i2c_rep_start(unsigned char address) -{ - return i2c_start( address ); - -}/* i2c_rep_start */ - - -/************************************************************************* - Terminates the data transfer and releases the I2C bus -*************************************************************************/ -void i2c_stop(void) -{ - /* send stop condition */ - TWCR = (1<<TWINT) | (1<<TWEN) | (1<<TWSTO); - - // wait until stop condition is executed and bus released - while(TWCR & (1<<TWSTO)); - -}/* i2c_stop */ - - -/************************************************************************* - Send one byte to I2C device - - Input: byte to be transfered - Return: 0 write successful - 1 write failed -*************************************************************************/ -unsigned char i2c_write( unsigned char data ) -{ - uint8_t twst; - - // send data to the previously addressed device - TWDR = data; - TWCR = (1<<TWINT) | (1<<TWEN); - - // wait until transmission completed - while(!(TWCR & (1<<TWINT))); - - // check value of TWI Status Register. Mask prescaler bits - twst = TW_STATUS & 0xF8; - if( twst != TW_MT_DATA_ACK) return 1; - return 0; - -}/* i2c_write */ - - -/************************************************************************* - Read one byte from the I2C device, request more data from device - - Return: byte read from I2C device -*************************************************************************/ -unsigned char i2c_readAck(void) -{ - TWCR = (1<<TWINT) | (1<<TWEN) | (1<<TWEA); - while(!(TWCR & (1<<TWINT))); - - return TWDR; - -}/* i2c_readAck */ - - -/************************************************************************* - Read one byte from the I2C device, read is followed by a stop condition - - Return: byte read from I2C device -*************************************************************************/ -unsigned char i2c_readNak(void) -{ - TWCR = (1<<TWINT) | (1<<TWEN); - while(!(TWCR & (1<<TWINT))); - - return TWDR; - -}/* i2c_readNak */