83 lines
2.4 KiB
C
83 lines
2.4 KiB
C
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#ifndef BQ_COM
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#define BQ_COM
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#include "BQ_Register_Definitions.h"
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#include "stm32f4xx_hal.h"
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#define FRM_WRT_NR 0x90
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#define FRM_WRT_R 0x81
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#define DEFAULTNUMOFCELLS 10
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#define DEFAULTNUMOFDIETEMPS 0
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#define BQUARTTIMEOUT 200
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typedef enum { BQ_COMM_OK, BQ_COMM_ERR_HAL, BQ_COMM_ERR_CRC } BQ_Comm_Status;
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/**
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* @brief Defines UART and DMA Handle
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*
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* Always call the init routine before using any other function of the libary.
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*/
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void init_BQCom(UART_HandleTypeDef* uarthandle);
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/**
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* @brief Calculate CRC according to BQ spec.
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*
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* @param message_buffer Message buffer, including two bytes for the CRC. The
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* CRC will be written to the last two bytes.
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* @param bufferlength The length of message_buffer, including the two bytes for
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* the CRC.
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*
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* @return 0 if the buffer is to small
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* @return 1 if the function was successful
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*/
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uint16_t Calculate_CRC(uint8_t* message_buffer, uint16_t bufferlength);
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/**
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* @brief Checks if the CRC is correct
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*
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* @return 0 if the Buffer is too small or the CRC is incorrect
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* @return 1 if the CRC is correct
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*/
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uint16_t Check_CRC(uint8_t* message_buffer, uint16_t bufferlength);
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/**
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* @brief Writes data to a register of the BQ76.
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*
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* @param registeraddress specifies the register. Address definitions are
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* available in BQ_Register_Definitions.h
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* @param registersize defines the register size in bytes.
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* @param data defines the data written to the BQ
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*/
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uint32_t BQ_Write_Register(uint8_t registeraddress, uint8_t registersize,
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uint32_t data);
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/**
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* @brief Read the data of a register specified by its address
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*
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* @param registeraddress specifies the register. Address definitions are
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* available in BQ_Register_Definitions.h
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* @param registersize defines the register size in bytes.
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*/
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uint8_t BQ_Read_Register(uint8_t registeraddress, uint8_t registersize,
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uint32_t* data);
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/**
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* @brief Reads Voltage Measurements from the BQ76
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*
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* Result are Written into the Buffer
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* Buffer size should be 2xMeasured Voltages
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*/
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BQ_Comm_Status BQ_ReadMeasurements(uint8_t* buffer, uint8_t bufferlength);
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/**
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* @brief Hardware layer implementation of the UART transmit
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*/
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uint8_t BQ_UART_Transmit(uint8_t* message_buffer, uint16_t bufferlength);
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/**
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* @brief Hardware layer implementation of the UART receive
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*/
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uint8_t BQ_UART_Receive(uint8_t* message_buffer, uint16_t bufferlength);
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#endif
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