mirror of
https://bitbucket.org/librepilot/librepilot.git
synced 2024-11-30 08:24:11 +01:00
112 lines
2.8 KiB
C
112 lines
2.8 KiB
C
/**
|
|
******************************************************************************
|
|
*
|
|
* @file pios_i2c_priv.h
|
|
* @author The OpenPilot Team, http://www.openpilot.org Copyright (C) 2010.
|
|
* @brief I2C private definitions.
|
|
* @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_PRIV_H
|
|
#define PIOS_I2C_PRIV_H
|
|
|
|
#include <pios.h>
|
|
#include <pios_stm32.h>
|
|
#include <stdbool.h>
|
|
|
|
struct pios_i2c_adapter_cfg {
|
|
I2C_TypeDef *regs;
|
|
uint32_t remap;
|
|
I2C_InitTypeDef init;
|
|
|
|
uint32_t transfer_timeout_ms;
|
|
struct stm32_gpio scl;
|
|
struct stm32_gpio sda;
|
|
struct stm32_irq event;
|
|
struct stm32_irq error;
|
|
};
|
|
|
|
enum i2c_adapter_state {
|
|
I2C_STATE_FSM_FAULT = 0, /* Must be zero so undefined transitions land here */
|
|
|
|
I2C_STATE_BUS_ERROR,
|
|
|
|
I2C_STATE_STOPPED,
|
|
I2C_STATE_STOPPING,
|
|
I2C_STATE_STARTING,
|
|
|
|
I2C_STATE_R_MORE_TXN_ADDR,
|
|
I2C_STATE_R_MORE_TXN_PRE_ONE,
|
|
I2C_STATE_R_MORE_TXN_PRE_FIRST,
|
|
I2C_STATE_R_MORE_TXN_PRE_MIDDLE,
|
|
I2C_STATE_R_MORE_TXN_PRE_LAST,
|
|
I2C_STATE_R_MORE_TXN_POST_LAST,
|
|
|
|
I2C_STATE_R_LAST_TXN_ADDR,
|
|
I2C_STATE_R_LAST_TXN_PRE_ONE,
|
|
I2C_STATE_R_LAST_TXN_PRE_FIRST,
|
|
I2C_STATE_R_LAST_TXN_PRE_MIDDLE,
|
|
I2C_STATE_R_LAST_TXN_PRE_LAST,
|
|
I2C_STATE_R_LAST_TXN_POST_LAST,
|
|
|
|
I2C_STATE_W_MORE_TXN_ADDR,
|
|
I2C_STATE_W_MORE_TXN_MIDDLE,
|
|
I2C_STATE_W_MORE_TXN_LAST,
|
|
|
|
I2C_STATE_W_LAST_TXN_ADDR,
|
|
I2C_STATE_W_LAST_TXN_MIDDLE,
|
|
I2C_STATE_W_LAST_TXN_LAST,
|
|
|
|
I2C_STATE_NACK,
|
|
|
|
I2C_STATE_NUM_STATES /* Must be last */
|
|
};
|
|
|
|
enum pios_i2c_adapter_magic {
|
|
PIOS_I2C_DEV_MAGIC = 0xa9a9b8b8,
|
|
};
|
|
|
|
struct pios_i2c_adapter {
|
|
enum pios_i2c_adapter_magic magic;
|
|
const struct pios_i2c_adapter_cfg * cfg;
|
|
#ifdef PIOS_INCLUDE_FREERTOS
|
|
xSemaphoreHandle sem_busy;
|
|
xSemaphoreHandle sem_ready;
|
|
#else
|
|
uint8_t busy;
|
|
#endif
|
|
|
|
bool bus_error;
|
|
bool nack;
|
|
|
|
volatile enum i2c_adapter_state curr_state;
|
|
const struct pios_i2c_txn *first_txn;
|
|
const struct pios_i2c_txn *active_txn;
|
|
const struct pios_i2c_txn *last_txn;
|
|
|
|
void (*callback) ();
|
|
|
|
uint8_t *active_byte;
|
|
uint8_t *last_byte;
|
|
};
|
|
|
|
int32_t PIOS_I2C_Init(uint32_t * i2c_id, const struct pios_i2c_adapter_cfg * cfg);
|
|
|
|
#endif /* PIOS_I2C_PRIV_H */
|