AVR I2C driver.
git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@4380 35acf78f-673a-0410-8e92-d51de3d6d3f4master
gdisirio
parent
21b907c946
commit
076b5bbb9a
|
|
@ -0,0 +1,293 @@
|
||||||
|
/*
|
||||||
|
ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010,
|
||||||
|
2011,2012 Giovanni Di Sirio.
|
||||||
|
|
||||||
|
This file is part of ChibiOS/RT.
|
||||||
|
|
||||||
|
ChibiOS/RT 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 3 of the License, or
|
||||||
|
(at your option) any later version.
|
||||||
|
|
||||||
|
ChibiOS/RT 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, see <http://www.gnu.org/licenses/>.
|
||||||
|
*/
|
||||||
|
|
||||||
|
/**
|
||||||
|
* @file AVR/i2c_lld.c
|
||||||
|
* @brief AVR I2C subsystem low level driver source.
|
||||||
|
*
|
||||||
|
* @addtogroup I2C
|
||||||
|
* @{
|
||||||
|
*/
|
||||||
|
|
||||||
|
#include "ch.h"
|
||||||
|
#include "hal.h"
|
||||||
|
|
||||||
|
#if HAL_USE_I2C || defined(__DOXYGEN__)
|
||||||
|
|
||||||
|
/*===========================================================================*/
|
||||||
|
/* Driver local definitions. */
|
||||||
|
/*===========================================================================*/
|
||||||
|
|
||||||
|
/*===========================================================================*/
|
||||||
|
/* Driver exported variables. */
|
||||||
|
/*===========================================================================*/
|
||||||
|
|
||||||
|
/** @brief I2C driver identifier.*/
|
||||||
|
#if USE_AVR_I2C || defined(__DOXYGEN__)
|
||||||
|
I2CDriver I2CD;
|
||||||
|
#endif
|
||||||
|
|
||||||
|
/*===========================================================================*/
|
||||||
|
/* Driver local variables. */
|
||||||
|
/*===========================================================================*/
|
||||||
|
|
||||||
|
/*===========================================================================*/
|
||||||
|
/* Driver local functions. */
|
||||||
|
/*===========================================================================*/
|
||||||
|
|
||||||
|
/**
|
||||||
|
* @brief Wakes up the waiting thread.
|
||||||
|
*
|
||||||
|
* @param[in] i2cp pointer to the @p I2CDriver object
|
||||||
|
* @param[in] msg wakeup message
|
||||||
|
*
|
||||||
|
* @notapi
|
||||||
|
*/
|
||||||
|
#define wakeup_isr(i2cp, msg) { \
|
||||||
|
chSysLockFromIsr(); \
|
||||||
|
if ((i2cp)->thread != NULL) { \
|
||||||
|
Thread *tp = (i2cp)->thread; \
|
||||||
|
(i2cp)->thread = NULL; \
|
||||||
|
tp->p_u.rdymsg = (msg); \
|
||||||
|
chSchReadyI(tp); \
|
||||||
|
} \
|
||||||
|
chSysUnlockFromIsr(); \
|
||||||
|
}
|
||||||
|
|
||||||
|
/*===========================================================================*/
|
||||||
|
/* Driver interrupt handlers. */
|
||||||
|
/*===========================================================================*/
|
||||||
|
|
||||||
|
#if USE_AVR_I2C || defined(__DOXYGEN__)
|
||||||
|
/**
|
||||||
|
* @brief I2C event interrupt handler.
|
||||||
|
*
|
||||||
|
* @notapi
|
||||||
|
*/
|
||||||
|
CH_IRQ_HANDLER(TWI_vect) {
|
||||||
|
CH_IRQ_PROLOGUE();
|
||||||
|
|
||||||
|
I2CDriver *i2cp = &I2CD;
|
||||||
|
|
||||||
|
switch (TWSR & 0xF8) {
|
||||||
|
case TWI_START:
|
||||||
|
case TWI_REPEAT_START:
|
||||||
|
TWDR = (i2cp->addr << 1);
|
||||||
|
if ((i2cp->txbuf == NULL) || (i2cp->txbytes == 0) || (i2cp->txidx == i2cp->txbytes)) {
|
||||||
|
TWDR |= 0x01;
|
||||||
|
}
|
||||||
|
TWCR = ((1 << TWINT) | (1 << TWEN) | (1 << TWIE));
|
||||||
|
break;
|
||||||
|
case TWI_MASTER_TX_ADDR_ACK:
|
||||||
|
case TWI_MASTER_TX_DATA_ACK:
|
||||||
|
if (i2cp->txidx < i2cp->txbytes) {
|
||||||
|
TWDR = i2cp->txbuf[i2cp->txidx++];
|
||||||
|
TWCR = ((1 << TWINT) | (1 << TWEN) | (1 << TWIE));
|
||||||
|
} else {
|
||||||
|
if (i2cp->rxbuf && i2cp->rxbytes) {
|
||||||
|
TWCR = ((1 << TWSTA) | (1 << TWINT) | (1 << TWEN) | (1 << TWIE));
|
||||||
|
} else {
|
||||||
|
TWCR = ((1 << TWSTO) | (1 << TWINT) | (1 << TWEN));
|
||||||
|
wakeup_isr(i2cp, RDY_OK);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
break;
|
||||||
|
case TWI_MASTER_RX_ADDR_ACK:
|
||||||
|
if (i2cp->rxidx == (i2cp->rxbytes - 1)) {
|
||||||
|
TWCR = ((1 << TWINT) | (1 << TWEN) | (1 << TWIE));
|
||||||
|
} else {
|
||||||
|
TWCR = ((1 << TWEA) | (1 << TWINT) | (1 << TWEN) | (1 << TWIE));
|
||||||
|
}
|
||||||
|
break;
|
||||||
|
case TWI_MASTER_RX_DATA_ACK:
|
||||||
|
i2cp->rxbuf[i2cp->rxidx++] = TWDR;
|
||||||
|
if (i2cp->rxidx == (i2cp->rxbytes - 1)) {
|
||||||
|
TWCR = ((1 << TWINT) | (1 << TWEN) | (1 << TWIE));
|
||||||
|
} else {
|
||||||
|
TWCR = ((1 << TWEA) | (1 << TWINT) | (1 << TWEN) | (1 << TWIE));
|
||||||
|
}
|
||||||
|
break;
|
||||||
|
case TWI_MASTER_RX_DATA_NACK:
|
||||||
|
i2cp->rxbuf[i2cp->rxidx] = TWDR;
|
||||||
|
TWCR = ((1 << TWSTO) | (1 << TWINT) | (1 << TWEN));
|
||||||
|
wakeup_isr(i2cp, RDY_OK);
|
||||||
|
case TWI_MASTER_TX_ADDR_NACK:
|
||||||
|
case TWI_MASTER_TX_DATA_NACK:
|
||||||
|
case TWI_MASTER_RX_ADDR_NACK:
|
||||||
|
i2cp->errors |= I2CD_ACK_FAILURE;
|
||||||
|
break;
|
||||||
|
case TWI_ARBITRATION_LOST:
|
||||||
|
i2cp->errors |= I2CD_ARBITRATION_LOST;
|
||||||
|
break;
|
||||||
|
case TWI_BUS_ERROR:
|
||||||
|
i2cp->errors |= I2CD_BUS_ERROR;
|
||||||
|
break;
|
||||||
|
default:
|
||||||
|
/* FIXME: only gets here if there are other MASTERs in the bus */
|
||||||
|
TWCR = ((1 << TWSTO) | (1 << TWINT) | (1 << TWEN));
|
||||||
|
wakeup_isr(i2cp, RDY_RESET);
|
||||||
|
}
|
||||||
|
|
||||||
|
if (i2cp->errors != I2CD_NO_ERROR) {
|
||||||
|
TWCR = ((1 << TWSTO) | (1 << TWINT) | (1 << TWEN));
|
||||||
|
wakeup_isr(i2cp, RDY_RESET);
|
||||||
|
}
|
||||||
|
|
||||||
|
CH_IRQ_EPILOGUE();
|
||||||
|
}
|
||||||
|
#endif /* USE_AVR_I2C */
|
||||||
|
|
||||||
|
/*===========================================================================*/
|
||||||
|
/* Driver exported functions. */
|
||||||
|
/*===========================================================================*/
|
||||||
|
|
||||||
|
/**
|
||||||
|
* @brief Low level I2C driver initialization.
|
||||||
|
*
|
||||||
|
* @notapi
|
||||||
|
*/
|
||||||
|
void i2c_lld_init(void) {
|
||||||
|
i2cObjectInit(&I2CD);
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* @brief Configures and activates the I2C peripheral.
|
||||||
|
*
|
||||||
|
* @param[in] i2cp pointer to the @p I2CDriver object
|
||||||
|
*
|
||||||
|
* @notapi
|
||||||
|
*/
|
||||||
|
void i2c_lld_start(I2CDriver *i2cp) {
|
||||||
|
|
||||||
|
/* TODO: Test TWI without external pull-ups (use internal) */
|
||||||
|
|
||||||
|
/* Configure prescaler to 1 */
|
||||||
|
TWSR &= 0xF8;
|
||||||
|
|
||||||
|
/* Configure baudrate */
|
||||||
|
TWBR = ((F_CPU / i2cp->config->clock_speed) - 16) / 2;
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* @brief Deactivates the I2C peripheral.
|
||||||
|
*
|
||||||
|
* @param[in] i2cp pointer to the @p I2CDriver object
|
||||||
|
*
|
||||||
|
* @notapi
|
||||||
|
*/
|
||||||
|
void i2c_lld_stop(I2CDriver *i2cp) {
|
||||||
|
|
||||||
|
if (i2cp->state != I2C_STOP) {
|
||||||
|
/* Disable TWI subsystem and stop all operations */
|
||||||
|
TWCR &= ~(1 << TWEN);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* @brief Receives data via the I2C bus as master.
|
||||||
|
*
|
||||||
|
* @param[in] i2cp pointer to the @p I2CDriver object
|
||||||
|
* @param[in] addr slave device address
|
||||||
|
* @param[out] rxbuf pointer to the receive buffer
|
||||||
|
* @param[in] rxbytes number of bytes to be received
|
||||||
|
* @param[in] timeout the number of ticks before the operation timeouts,
|
||||||
|
* the following special values are allowed:
|
||||||
|
* - @a TIME_INFINITE no timeout.
|
||||||
|
* .
|
||||||
|
* @return The operation status.
|
||||||
|
* @retval RDY_OK if the function succeeded.
|
||||||
|
* @retval RDY_RESET if one or more I2C errors occurred, the errors can
|
||||||
|
* be retrieved using @p i2cGetErrors().
|
||||||
|
* @retval RDY_TIMEOUT if a timeout occurred before operation end. <b>After a
|
||||||
|
* timeout the driver must be stopped and restarted
|
||||||
|
* because the bus is in an uncertain state</b>.
|
||||||
|
*
|
||||||
|
* @notapi
|
||||||
|
*/
|
||||||
|
msg_t i2c_lld_master_receive_timeout(I2CDriver *i2cp, i2caddr_t addr,
|
||||||
|
uint8_t *rxbuf, size_t rxbytes,
|
||||||
|
systime_t timeout) {
|
||||||
|
i2cp->addr = addr;
|
||||||
|
i2cp->txbuf = NULL;
|
||||||
|
i2cp->txbytes = 0;
|
||||||
|
i2cp->txidx = 0;
|
||||||
|
i2cp->rxbuf = rxbuf;
|
||||||
|
i2cp->rxbytes = rxbytes;
|
||||||
|
i2cp->rxidx = 0;
|
||||||
|
|
||||||
|
/* Send START */
|
||||||
|
TWCR = ((1 << TWSTA) | (1 << TWINT) | (1 << TWEN) | (1 << TWIE));
|
||||||
|
|
||||||
|
chSysLock();
|
||||||
|
i2cp->thread = chThdSelf();
|
||||||
|
chSchGoSleepS(THD_STATE_SUSPENDED);
|
||||||
|
chSysUnlock();
|
||||||
|
|
||||||
|
return chThdSelf()->p_u.rdymsg;
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* @brief Transmits data via the I2C bus as master.
|
||||||
|
*
|
||||||
|
* @param[in] i2cp pointer to the @p I2CDriver object
|
||||||
|
* @param[in] addr slave device address
|
||||||
|
* @param[in] txbuf pointer to the transmit buffer
|
||||||
|
* @param[in] txbytes number of bytes to be transmitted
|
||||||
|
* @param[out] rxbuf pointer to the receive buffer
|
||||||
|
* @param[in] rxbytes number of bytes to be received
|
||||||
|
* @param[in] timeout the number of ticks before the operation timeouts,
|
||||||
|
* the following special values are allowed:
|
||||||
|
* - @a TIME_INFINITE no timeout.
|
||||||
|
* .
|
||||||
|
* @return The operation status.
|
||||||
|
* @retval RDY_OK if the function succeeded.
|
||||||
|
* @retval RDY_RESET if one or more I2C errors occurred, the errors can
|
||||||
|
* be retrieved using @p i2cGetErrors().
|
||||||
|
* @retval RDY_TIMEOUT if a timeout occurred before operation end. <b>After a
|
||||||
|
* timeout the driver must be stopped and restarted
|
||||||
|
* because the bus is in an uncertain state</b>.
|
||||||
|
*
|
||||||
|
* @notapi
|
||||||
|
*/
|
||||||
|
msg_t i2c_lld_master_transmit_timeout(I2CDriver *i2cp, i2caddr_t addr,
|
||||||
|
const uint8_t *txbuf, size_t txbytes,
|
||||||
|
uint8_t *rxbuf, size_t rxbytes,
|
||||||
|
systime_t timeout) {
|
||||||
|
i2cp->addr = addr;
|
||||||
|
i2cp->txbuf = txbuf;
|
||||||
|
i2cp->txbytes = txbytes;
|
||||||
|
i2cp->txidx = 0;
|
||||||
|
i2cp->rxbuf = rxbuf;
|
||||||
|
i2cp->rxbytes = rxbytes;
|
||||||
|
i2cp->rxidx = 0;
|
||||||
|
|
||||||
|
TWCR = ((1 << TWSTA) | (1 << TWINT) | (1 << TWEN) | (1 << TWIE));
|
||||||
|
|
||||||
|
chSysLock();
|
||||||
|
i2cp->thread = chThdSelf();
|
||||||
|
chSchGoSleepS(THD_STATE_SUSPENDED);
|
||||||
|
chSysUnlock();
|
||||||
|
|
||||||
|
return chThdSelf()->p_u.rdymsg;
|
||||||
|
}
|
||||||
|
|
||||||
|
#endif /* HAL_USE_I2C */
|
||||||
|
|
||||||
|
/** @} */
|
||||||
|
|
@ -0,0 +1,227 @@
|
||||||
|
/*
|
||||||
|
ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010,
|
||||||
|
2011,2012 Giovanni Di Sirio.
|
||||||
|
|
||||||
|
This file is part of ChibiOS/RT.
|
||||||
|
|
||||||
|
ChibiOS/RT 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 3 of the License, or
|
||||||
|
(at your option) any later version.
|
||||||
|
|
||||||
|
ChibiOS/RT 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, see <http://www.gnu.org/licenses/>.
|
||||||
|
*/
|
||||||
|
|
||||||
|
/**
|
||||||
|
* @file AVR/i2c_lld.h
|
||||||
|
* @brief AVR I2C subsystem low level driver header.
|
||||||
|
*
|
||||||
|
* @addtogroup I2C
|
||||||
|
* @{
|
||||||
|
*/
|
||||||
|
|
||||||
|
#ifndef _I2C_LLD_H_
|
||||||
|
#define _I2C_LLD_H_
|
||||||
|
|
||||||
|
#if HAL_USE_I2C || defined(__DOXYGEN__)
|
||||||
|
|
||||||
|
/*===========================================================================*/
|
||||||
|
/* Driver constants. */
|
||||||
|
/*===========================================================================*/
|
||||||
|
|
||||||
|
/** START transmitted */
|
||||||
|
#define TWI_START 0x08
|
||||||
|
/** Repeated START transmitted */
|
||||||
|
#define TWI_REPEAT_START 0x10
|
||||||
|
/** Arbitration Lost */
|
||||||
|
#define TWI_ARBITRATION_LOST 0x38
|
||||||
|
/** Bus errors */
|
||||||
|
#define TWI_BUS_ERROR 0x00
|
||||||
|
|
||||||
|
/** SLA+W transmitted with ACK response */
|
||||||
|
#define TWI_MASTER_TX_ADDR_ACK 0x18
|
||||||
|
/** SLA+W transmitted with NACK response */
|
||||||
|
#define TWI_MASTER_TX_ADDR_NACK 0x20
|
||||||
|
/** DATA transmitted with ACK response */
|
||||||
|
#define TWI_MASTER_TX_DATA_ACK 0x28
|
||||||
|
/** DATA transmitted with NACK response */
|
||||||
|
#define TWI_MASTER_TX_DATA_NACK 0x30
|
||||||
|
|
||||||
|
/** SLA+R transmitted with ACK response */
|
||||||
|
#define TWI_MASTER_RX_ADDR_ACK 0x40
|
||||||
|
/** SLA+R transmitted with NACK response */
|
||||||
|
#define TWI_MASTER_RX_ADDR_NACK 0x48
|
||||||
|
/** DATA received with ACK response */
|
||||||
|
#define TWI_MASTER_RX_DATA_ACK 0x50
|
||||||
|
/** DATA received with NACK response */
|
||||||
|
#define TWI_MASTER_RX_DATA_NACK 0x58
|
||||||
|
|
||||||
|
/*===========================================================================*/
|
||||||
|
/* Driver pre-compile time settings. */
|
||||||
|
/*===========================================================================*/
|
||||||
|
|
||||||
|
/**
|
||||||
|
* @name Configuration options
|
||||||
|
* @{
|
||||||
|
*/
|
||||||
|
/**
|
||||||
|
* @brief I2C driver enable switch.
|
||||||
|
* @details If set to @p TRUE the support for I2C is included.
|
||||||
|
* @note The default is @p FALSE.
|
||||||
|
*/
|
||||||
|
#if !defined(USE_AVR_I2C) || defined(__DOXYGEN__)
|
||||||
|
#define USE_AVR_I2C FALSE
|
||||||
|
#endif
|
||||||
|
|
||||||
|
/*===========================================================================*/
|
||||||
|
/* Derived constants and error checks. */
|
||||||
|
/*===========================================================================*/
|
||||||
|
|
||||||
|
/*===========================================================================*/
|
||||||
|
/* Driver data structures and types. */
|
||||||
|
/*===========================================================================*/
|
||||||
|
|
||||||
|
/**
|
||||||
|
* @brief Type representing I2C address.
|
||||||
|
*/
|
||||||
|
typedef uint8_t i2caddr_t;
|
||||||
|
|
||||||
|
/**
|
||||||
|
* @brief I2C Driver condition flags type.
|
||||||
|
*/
|
||||||
|
typedef uint8_t i2cflags_t;
|
||||||
|
|
||||||
|
/**
|
||||||
|
* @brief Driver configuration structure.
|
||||||
|
* @note Implementations may extend this structure to contain more,
|
||||||
|
* architecture dependent, fields.
|
||||||
|
*/
|
||||||
|
typedef struct {
|
||||||
|
|
||||||
|
/**
|
||||||
|
* @brief Specifies the I2C clock frequency.
|
||||||
|
*/
|
||||||
|
uint32_t clock_speed;
|
||||||
|
|
||||||
|
} I2CConfig;
|
||||||
|
|
||||||
|
/**
|
||||||
|
* @brief Structure representing an I2C driver.
|
||||||
|
*/
|
||||||
|
struct I2CDriver {
|
||||||
|
/**
|
||||||
|
* @brief Driver state.
|
||||||
|
*/
|
||||||
|
i2cstate_t state;
|
||||||
|
/**
|
||||||
|
* @brief Current configuration data.
|
||||||
|
*/
|
||||||
|
const I2CConfig *config;
|
||||||
|
/**
|
||||||
|
* @brief Error flags.
|
||||||
|
*/
|
||||||
|
i2cflags_t errors;
|
||||||
|
#if I2C_USE_MUTUAL_EXCLUSION || defined(__DOXYGEN__)
|
||||||
|
#if CH_USE_MUTEXES || defined(__DOXYGEN__)
|
||||||
|
/**
|
||||||
|
* @brief Mutex protecting the bus.
|
||||||
|
*/
|
||||||
|
Mutex mutex;
|
||||||
|
#elif CH_USE_SEMAPHORES
|
||||||
|
Semaphore semaphore;
|
||||||
|
#endif
|
||||||
|
#endif /* I2C_USE_MUTUAL_EXCLUSION */
|
||||||
|
#if defined(I2C_DRIVER_EXT_FIELDS)
|
||||||
|
I2C_DRIVER_EXT_FIELDS
|
||||||
|
#endif
|
||||||
|
/* End of the mandatory fields.*/
|
||||||
|
/**
|
||||||
|
* @brief Thread waiting for I/O completion.
|
||||||
|
*/
|
||||||
|
Thread *thread;
|
||||||
|
/**
|
||||||
|
* @brief Address of slave device
|
||||||
|
*/
|
||||||
|
i2caddr_t addr;
|
||||||
|
/**
|
||||||
|
* @brief Pointer to the buffer with data to send.
|
||||||
|
*/
|
||||||
|
const uint8_t *txbuf;
|
||||||
|
/**
|
||||||
|
* @brief Number of bytes of data to send.
|
||||||
|
*/
|
||||||
|
size_t txbytes;
|
||||||
|
/**
|
||||||
|
* @brief Current index in buffer when sending data.
|
||||||
|
*/
|
||||||
|
size_t txidx;
|
||||||
|
/**
|
||||||
|
* @brief Pointer to the buffer to put received data.
|
||||||
|
*/
|
||||||
|
uint8_t *rxbuf;
|
||||||
|
/**
|
||||||
|
* @brief Number of bytes of data to receive.
|
||||||
|
*/
|
||||||
|
size_t rxbytes;
|
||||||
|
/**
|
||||||
|
* @brief Current index in buffer when receiving data.
|
||||||
|
*/
|
||||||
|
size_t rxidx;
|
||||||
|
};
|
||||||
|
|
||||||
|
/**
|
||||||
|
* @brief Type of a structure representing an I2C driver.
|
||||||
|
*/
|
||||||
|
typedef struct I2CDriver I2CDriver;
|
||||||
|
|
||||||
|
/*===========================================================================*/
|
||||||
|
/* Driver macros. */
|
||||||
|
/*===========================================================================*/
|
||||||
|
|
||||||
|
/**
|
||||||
|
* @brief Get errors from I2C driver.
|
||||||
|
*
|
||||||
|
* @param[in] i2cp pointer to the @p I2CDriver object
|
||||||
|
*
|
||||||
|
* @notapi
|
||||||
|
*/
|
||||||
|
#define i2c_lld_get_errors(i2cp) ((i2cp)->errors)
|
||||||
|
|
||||||
|
/*===========================================================================*/
|
||||||
|
/* External declarations. */
|
||||||
|
/*===========================================================================*/
|
||||||
|
|
||||||
|
#if !defined(__DOXYGEN__)
|
||||||
|
#if USE_AVR_I2C
|
||||||
|
extern I2CDriver I2CD;
|
||||||
|
#endif
|
||||||
|
#endif /* !defined(__DOXYGEN__) */
|
||||||
|
|
||||||
|
#ifdef __cplusplus
|
||||||
|
extern "C" {
|
||||||
|
#endif
|
||||||
|
void i2c_lld_init(void);
|
||||||
|
void i2c_lld_start(I2CDriver *i2cp);
|
||||||
|
void i2c_lld_stop(I2CDriver *i2cp);
|
||||||
|
msg_t i2c_lld_master_transmit_timeout(I2CDriver *i2cp, i2caddr_t addr,
|
||||||
|
const uint8_t *txbuf, size_t txbytes,
|
||||||
|
uint8_t *rxbuf, size_t rxbytes,
|
||||||
|
systime_t timeout);
|
||||||
|
msg_t i2c_lld_master_receive_timeout(I2CDriver *i2cp, i2caddr_t addr,
|
||||||
|
uint8_t *rxbuf, size_t rxbytes,
|
||||||
|
systime_t timeout);
|
||||||
|
#ifdef __cplusplus
|
||||||
|
}
|
||||||
|
#endif
|
||||||
|
|
||||||
|
#endif /* HAL_USE_I2C */
|
||||||
|
|
||||||
|
#endif /* _I2C_LLD_H_ */
|
||||||
|
|
||||||
|
/** @} */
|
||||||
|
|
@ -100,3 +100,15 @@
|
||||||
* .
|
* .
|
||||||
* @ingroup AVR_DRIVERS
|
* @ingroup AVR_DRIVERS
|
||||||
*/
|
*/
|
||||||
|
|
||||||
|
/**
|
||||||
|
* @defgroup AVR_I2C AVR I2C Support
|
||||||
|
* @details The AVR I2C driver uses the TWI peripheral in an interrupt
|
||||||
|
* driven, implementation.
|
||||||
|
*
|
||||||
|
* @section avr_i2c Supported HW resources
|
||||||
|
* The i2c driver can support the following hardware resource:
|
||||||
|
* - I2C.
|
||||||
|
* .
|
||||||
|
* @ingroup AVR_DRIVERS
|
||||||
|
*/
|
||||||
|
|
|
||||||
|
|
@ -1,7 +1,8 @@
|
||||||
# List of all the AVR platform files.
|
# List of all the AVR platform files.
|
||||||
PLATFORMSRC = ${CHIBIOS}/os/hal/platforms/AVR/hal_lld.c \
|
PLATFORMSRC = ${CHIBIOS}/os/hal/platforms/AVR/hal_lld.c \
|
||||||
${CHIBIOS}/os/hal/platforms/AVR/pal_lld.c \
|
${CHIBIOS}/os/hal/platforms/AVR/pal_lld.c \
|
||||||
${CHIBIOS}/os/hal/platforms/AVR/serial_lld.c
|
${CHIBIOS}/os/hal/platforms/AVR/serial_lld.c \
|
||||||
|
${CHIBIOS}/os/hal/platforms/AVR/i2c_lld.c
|
||||||
|
|
||||||
# Required include directories
|
# Required include directories
|
||||||
PLATFORMINC = ${CHIBIOS}/os/hal/platforms/AVR
|
PLATFORMINC = ${CHIBIOS}/os/hal/platforms/AVR
|
||||||
|
|
|
||||||
|
|
@ -163,6 +163,7 @@
|
||||||
to 2.4.1).
|
to 2.4.1).
|
||||||
- NEW: Added demo for Arduino Mega, contributed by Fabio Utzig.
|
- NEW: Added demo for Arduino Mega, contributed by Fabio Utzig.
|
||||||
- NEW: Added support for ATmega1280, contributed by Fabio Utzig.
|
- NEW: Added support for ATmega1280, contributed by Fabio Utzig.
|
||||||
|
- NEW: Added I2C driver for AVR, contributed by Fabio Utzig.
|
||||||
- NEW: Added FatFs demo for the Olimex STM32-P107 board.
|
- NEW: Added FatFs demo for the Olimex STM32-P107 board.
|
||||||
- NEW: Added support for the Olimex STM32-E407 board. Added an integrated
|
- NEW: Added support for the Olimex STM32-E407 board. Added an integrated
|
||||||
demo including USB-CDC, lwIP with web server, FatFs and shell, all running
|
demo including USB-CDC, lwIP with web server, FatFs and shell, all running
|
||||||
|
|
|
||||||
Loading…
Reference in New Issue