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LibrePilot/flight/pios/inc/pios_i2c.h

90 lines
2.6 KiB
C

/**
******************************************************************************
* @addtogroup PIOS PIOS Core hardware abstraction layer
* @{
* @addtogroup PIOS_I2C I2C Functions
* @{
*
* @file pios_i2c.h
* @author The OpenPilot Team, http://www.openpilot.org Copyright (C) 2010.
* @brief I2C functions header.
* @see The GNU Public License (GPL) Version 3
*
*****************************************************************************/
/*
* 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 3 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.,
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef PIOS_I2C_H
#define PIOS_I2C_H
#define PIOS_I2C_DIAGNOSTICS
#include <stdbool.h>
/* Global Types */
enum pios_i2c_txn_direction {
PIOS_I2C_TXN_READ,
PIOS_I2C_TXN_WRITE
};
struct pios_i2c_txn {
const char *info;
uint16_t addr;
enum pios_i2c_txn_direction rw;
uint32_t len;
uint8_t *buf;
};
#define I2C_LOG_DEPTH 20
enum pios_i2c_error_type {
PIOS_I2C_ERROR_EVENT,
PIOS_I2C_ERROR_FSM,
PIOS_I2C_ERROR_INTERRUPT
};
struct pios_i2c_fault_history {
enum pios_i2c_error_type type;
uint32_t evirq[I2C_LOG_DEPTH];
uint32_t erirq[I2C_LOG_DEPTH];
uint8_t event[I2C_LOG_DEPTH];
uint8_t state[I2C_LOG_DEPTH];
};
enum pios_i2c_error_count {
PIOS_I2C_BAD_EVENT_COUNTER,
PIOS_I2C_FSM_FAULT_COUNT,
PIOS_I2C_ERROR_INTERRUPT_COUNTER,
PIOS_I2C_NACK_COUNTER,
PIOS_I2C_TIMEOUT_COUNTER,
PIOS_I2C_ERROR_COUNT_NUMELEM,
};
/* Public Functions */
extern int32_t PIOS_I2C_Transfer(uint32_t i2c_id, const struct pios_i2c_txn txn_list[], uint32_t num_txns);
extern int32_t PIOS_I2C_Transfer_Callback(uint32_t i2c_id, const struct pios_i2c_txn txn_list[], uint32_t num_txns, void *callback);
extern void PIOS_I2C_EV_IRQ_Handler(uint32_t i2c_id);
extern void PIOS_I2C_ER_IRQ_Handler(uint32_t i2c_id);
extern void PIOS_I2C_IRQ_Handler(uint32_t i2c_id);
extern void PIOS_I2C_GetDiagnostics(struct pios_i2c_fault_history *data, uint8_t *error_counts);
#endif /* PIOS_I2C_H */
/**
* @}
* @}
*/