David Giles / Mbed 2 deprecated CM-MBED_RSEDP_Test_Suite_LPC1768_V3

This is a complete listing of the RS-EDP software for the mbed module to support the RS-EDP platform.

Dependencies:   mbed

SourceFiles/RSEDP_BB_24LC32_Serial_EEPROM.cpp@0:5b7639d1f2c4, 2010-11-19 (annotated)

Committer:
DavidGilesHitex
Date:
Fri Nov 19 09:49:16 2010 +0000
Revision:
0:5b7639d1f2c4

        

        
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/* Serial EEPROM I2C Type 24LC32 C Source Code Driver File */





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/* ******************************************************* */





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/* Version 1.00 */





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/* Start Date: 25/2/2008 */





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/* Include Files Here */





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#include "mbed.h"                                /* mbed header file */





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#include "misra_types.h"                         /* MISRA Types header file */





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#include "defines.h"





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#include "mbed_Port_Structure.h"                /* Port structure for MBED Module */





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#include "RSEDP_CNTRL_I2C.h"                    /* Control I2C Driver */





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/* Function Prototypes Here */





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sint32_t RSEDP_BB_setup_24LC32(uint8_t Slave_Address);                                                                /* Configure the I2C EEPROM */





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sint32_t RSEDP_BB_eeprom_store_byte(uint8_t Slave_Address, sint8_t payload, uint16_t eeaddress);                    /* Write one byte to one memory location */





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sint32_t RSEDP_BB_eeprom_store_bytes(uint8_t Slave_Address, sint8_t *payload, uint8_t qty, uint16_t eeaddress);     /* Called by main to write multiple bytes to the serial EEPROM */





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sint32_t RSEDP_BB_eeprom_read_byte(uint8_t Slave_Address, sint8_t *read_value, uint16_t eeaddress);                    /* Read one byte from one location */





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sint32_t RSEDP_BB_eeprom_read_bytes(uint8_t Slave_Address, sint8_t *payload, uint16_t qty, uint16_t eeaddress);        /* Read several byte from one location */





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static void delay_small(void);                                                                                    /* Local static 1us delay routine  */





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/* Setup the serial interface to the EEPROM */





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sint32_t RSEDP_BB_setup_24LC32(uint8_t Slave_Address)                                                                /* Configure the 24LC32 */





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    {





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        sint32_t Ack_Status = 0;





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        /* Assume the I2C bus is already configured. This is normally done on mbed_Port_Structure.c */





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        Ack_Status = CNTRL_I2C_Master_Mode_Transmit(Slave_Address, 0, 1);                                                    /* Ping the device */





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        return Ack_Status;





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    }





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/* Store one byte at one address location */





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sint32_t RSEDP_BB_eeprom_store_byte(uint8_t Slave_Address, sint8_t payload, uint16_t eeaddress)                    /* Write one byte to one memory location */





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    {





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        sint32_t Ack_Status = 0;





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        sint8_t tx_array[3];                                                     /* two byte array used to hold transmission packet */





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        eeaddress = (eeaddress & 0x0fff);                                        /* Ensure address is not more than 12 bit */





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        tx_array[0] = (uint8_t) (eeaddress >> 8);                               /* Extract high part */                                                





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        tx_array[1] = (uint8_t) eeaddress;                                         /* Extract Low address */                                                





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        tx_array[2] = payload;                                                    /* second member of array is the value to be stored */





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        Ack_Status = CNTRL_I2C_Master_Mode_Transmit(Slave_Address, tx_array, 3);                /* Send a data packet to a slave, record acknowledge bit */





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        delay_small();





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        return Ack_Status;                                                           





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    }





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/* Write upto 32 bytes into the EEPROM all at once */





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sint32_t RSEDP_BB_eeprom_store_bytes(uint8_t Slave_Address, sint8_t *payload, uint8_t qty, uint16_t eeaddress)     /* Called by main to write multiple bytes to the serial EEPROM */





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    {





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        sint32_t Ack_Status = 0;





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        uint8_t n=0;                                                               /* Scratch pad variable */





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        sint8_t tx_array[34];                                                      /* transmission array */





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        eeaddress = (eeaddress & 0x0fff);                                        /* Cap range to 12 bit address */





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        tx_array[0]=(uint8_t) (eeaddress >> 8);                                 /* Extract high address byte */                                        





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        tx_array[1]=(uint8_t) eeaddress;                                         /* Extract Low address */                                            





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        for (n = 2; n < (qty + 2); n++)                                          /* Copy the transmission data into a local array */





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            {





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                tx_array[n] = *payload;





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                payload++;





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            }





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        Ack_Status = CNTRL_I2C_Master_Mode_Transmit(Slave_Address, tx_array, (qty+2));        /* Send data out on I2C bus */





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        delay_small();                                                             /* EEPROM Busy period - self timed */





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        return Ack_Status;





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    }





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/* Read One Byte From An Address */





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sint32_t RSEDP_BB_eeprom_read_byte(uint8_t Slave_Address, sint8_t *payload, uint16_t eeaddress)    /* Read one byte from one location */





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    {





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        sint32_t Ack_Status = 0;





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        sint8_t tx_array[3];





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        sint8_t rx_array = 0;                                                    /* Variable used to receive data from slave */





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        eeaddress = (eeaddress & 0x0fff);                                        /* Cap address to 12 bit */





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        tx_array[0] = (uint8_t) (eeaddress >> 8);                                /* Extract high order byte */                                            





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        tx_array[1] = (uint8_t) eeaddress;                                         /* Extract low address */                                                





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        Ack_Status = CNTRL_I2C_Master_Mode_Transmit(Slave_Address, tx_array, 2);                /* Set the EEPROM address */





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//        delay_small();                                                             /* EEPROM is busy writing */





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        if (Ack_Status == ACK)





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            {





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                Ack_Status = CNTRL_I2C_Master_Mode_Receive(Slave_Address, &rx_array,1);                /* Read single byte address */





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            }





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        *payload = rx_array;                                                     /* Load value from EEPROM into receive pointer */





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        return Ack_Status;





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    }





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/* Read several byte from the memory location */





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sint32_t RSEDP_BB_eeprom_read_bytes(uint8_t Slave_Address, sint8_t *payload, uint16_t qty, uint16_t eeaddress)





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    {





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        sint32_t Ack_Status = 0;





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        sint8_t tx_array[3];





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        uint8_t address_low = 0;                                                /* EEPROM high address byte */





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        uint8_t address_high = 0;                                                /* EEPROM low address byte */





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        eeaddress = (eeaddress & 0x0fff);                                        /* Cap to 12 bit address */





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        address_high = (uint8_t) (eeaddress >> 8);                                /* Extract high order address byte */





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        address_low = (uint8_t) eeaddress;                                         /* Extract Low address byte */





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        tx_array[0] = address_high;                                                /* first member of array is the EEPROM high address */





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        tx_array[1] = address_low;                                                /* Low byte next */





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        Ack_Status = CNTRL_I2C_Master_Mode_Transmit(Slave_Address, tx_array, 2);                /* Set the EEPROM address */





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        delay_small();                                                            /* Write time delay busy period */





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        if (Ack_Status == ACK)





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            {





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                Ack_Status = CNTRL_I2C_Master_Mode_Receive(Slave_Address, payload, qty);                /* Read address */





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            }





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        return Ack_Status;





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    }





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/* Small 5ms delay approx */





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/* Note: Change this delay to suite the write time/busy period of the EEPROM */





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static void delay_small(void)





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{





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    uint32_t nnnn = 0;





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    for(nnnn = 0; nnnn < 0x6000; nnnn++)





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        {





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            ;





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        }





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}





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