n775.h

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 *
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/**
 * @file    n775.h
 * @author  foxBMS Team
 * @date    2020-05-08 (date of creation)
 * @updated 2022-05-30 (date of last update)
 * @version v1.3.0
 * @ingroup DRIVERS
 * @prefix  N775
 *
 * @brief   Headers for the driver for the MC33775A monitoring chip.
 *
 */
 
#ifndef FOXBMS__N775_H_
#define FOXBMS__N775_H_
 
/*========== Includes =======================================================*/
#include "n775_cfg.h"
 
/*========== Macros and Definitions =========================================*/
 
/*========== Extern Constant and Variable Declarations ======================*/
/**
 * Buffer used for SPI Rx transmissions for the communication with MC33775A.
 */
extern uint16_t n775_RXbuffer[N775_MAX_N_BYTES_FOR_DATA_RECEPTION];
/**
 * Buffer used for SPI Tx transmissions for the communication with MC33775A.
 */
extern uint16_t n775_TXbuffer[N775_TX_MESSAGE_LENGTH];
 
/**
 * Struct used for SPI Tx transmissions for the communicaiton with MC33775A.
 */
extern N775_MESSAGE_s n775_sentData;
/**
 * Struct used for SPI Rx transmissions for the communicaiton with MC33775A.
 */
extern N775_MESSAGE_s n775_receivedData;
 
/**
 * Variable containing the state machine state for the MC33775A driver.
 */
extern N775_STATE_s n775_state;
 
/*========== Extern Function Prototypes =====================================*/
 
/**
 * @brief   trigger function for the N775 driver state machine.
 *
 * This function contains the sequence of events in the N775 state machine.
 * It must be called time-triggered, every 1ms.
 */
extern void N775_Trigger(void);
 
/**
 * @brief   sets the current state request of the state variable n775_state.
 *
 * This function is used to make a state request to the state machine,e.g, start voltage measurement,
 * read result of voltage measurement, re-initialization
 * It calls N775_CheckStateRequest() to check if the request is valid.
 * The state request is rejected if is not valid.
 * The result of the check is returned immediately, so that the requester can act in case
 * it made a non-valid state request.
 *
 * @param   statereq    state request to set
 * @return  retVal      current state request, taken from N775_STATE_REQUEST_e
 */
extern N775_RETURN_TYPE_e N775_SetStateRequest(N775_STATE_REQUEST_e statereq);
 
extern bool N775_IsFirstMeasurementCycleFinished(void);
 
extern void N775_SaveVoltages(void);
extern void N775_SaveTemperatures(void);
extern N775_STATE_REQUEST_e N775_GetStateRequest(void);
extern N775_STATEMACH_e N775_GetState(void);
 
/*========== Externalized Static Functions Prototypes (Unit Test) ===========*/
#ifdef UNITY_UNIT_TEST
/* Start test functions */
extern uint8_t TEST_N775_CheckReEntrance();
extern void TEST_N775_SetFirstMeasurementCycleFinished(N775_STATE_s *n775_state);
/* End test functions */
#endif
 
#endif /* FOXBMS__N775_H_ */