/******************************************************************//**
* @file lpc_i2c_m24256.c
* @brief Contains all functions support for I2C based E2PROM
* M24256-BWMN6P library on LPC17xx
* @version 1.0
* @date 11. Dec. 2013
* @author Dwijay.Edutech Learning Solutions
**********************************************************************/
/* Peripheral group ----------------------------------------------------------- */
/** @addtogroup EEPROM
* @{
*/
/* Includes ------------------------------------------------------------------- */
#include "lpc_i2c_m24256.h"
/* If this source file built with example, the LPC17xx FW library configuration
* file in each example directory ("lpc17xx_libcfg.h") must be included,
* otherwise the default FW library configuration file must be included instead
*/
/** @addtogroup EEPROM_Public_Functions
* @{
*/
/* Public Functions ----------------------------------------------------------- */
/*********************************************************************//**
* @brief Writes byte at given address
* @param[in] eep_address Word Address range[0000 - 4000]
* @param[in] byte_data Byte value
* @return status
**********************************************************************/
char I2C_IEeprom_Write_Byte (uint16_t eep_address, uint8_t byte_data)
{
/* Transmit setup */
I2C_M_SETUP_Type txsetup;
I2C_Tx_Buf[0] =(eep_address & 0x8FFF) >> 8; // 1st byte extract
// printf(LPC_UART0,"%x02",set_addr);
I2C_Tx_Buf[1] = (uchar)(eep_address & 0xFF); // 2st byte extract
I2C_Tx_Buf[2] = byte_data;
txsetup.sl_addr7bit = E2PM24256_ID;
txsetup.tx_data = I2C_Tx_Buf;
txsetup.tx_length = 3;
txsetup.rx_data = NULL;
txsetup.rx_length = 0;
txsetup.retransmissions_max = 50;
/* write byte to addr */
if(I2C_MasterTransferData(LPC_I2C0, &txsetup, I2C_TRANSFER_POLLING)==SUCCESS) //return status
{
return (0);
}
else
{
return (-1);
}
}
/*********************************************************************//**
* @brief Writes byte at given address
* @param[in] eep_address Word Address range[0000 - 4000]
* @param[in] byte_data Byte value
* @return status
**********************************************************************/
char I2C_IEeprom_Write (uint16_t eep_address, uint8_t* byte_data, uint16_t length)
{
/* Transmit setup */
I2C_M_SETUP_Type txsetup;
uint16_t ip_len,new_length,i;
uint16_t new_address;
/* Intern page length(ip_len) gives length from address that can be occupied in page */
ip_len = 0x40 - (eep_address % 0x40);
new_address = eep_address + ip_len;
I2C_Tx_Buf[0] =(eep_address & 0x8FFF) >> 8; // 1st byte extract
// printf(LPC_UART0,"%x02",I2C_Tx_Buf[0]);
I2C_Tx_Buf[1] = (uchar)(eep_address & 0xFF); // 2st byte extract
if(length > ip_len)
{
new_length = length - ip_len;
for(i=2;i<(ip_len+2);i++)
{
I2C_Tx_Buf[i]=*byte_data++;
}
txsetup.sl_addr7bit = E2PM24256_ID;
txsetup.tx_data = I2C_Tx_Buf;
txsetup.tx_length = ip_len+2;
txsetup.rx_data = NULL;
txsetup.rx_length = 0;
txsetup.retransmissions_max = 50;
if(I2C_MasterTransferData(LPC_I2C0, &txsetup, I2C_TRANSFER_POLLING)==ERROR) //return status
{
return (-1);
}
// Recursive function
delay_ms(5);
I2C_IEeprom_Write(new_address,byte_data,new_length);
}
if(length <= ip_len)
{
for(i=2;i<(length+2);i++)
{
I2C_Tx_Buf[i]=*byte_data++;
}
txsetup.sl_addr7bit = E2PM24256_ID;
txsetup.tx_data = I2C_Tx_Buf;
txsetup.tx_length = length+2;
txsetup.rx_data = NULL;
txsetup.rx_length = 0;
txsetup.retransmissions_max = 50;
if(I2C_MasterTransferData(LPC_I2C0, &txsetup, I2C_TRANSFER_POLLING)==SUCCESS) //return status
{
return (0);
}
else
{
return (-1);
}
}
}
/*********************************************************************//**
* @brief Reads byte from given address
* @param[in] eep_address Word Address range[0000 - 4000]
* @return Byte value
**********************************************************************/
uint8_t I2C_IEeprom_Read_Byte (uint16_t eep_address)
{
/* Receive setup */
I2C_M_SETUP_Type rxsetup;
I2C_Tx_Buf[0] = (eep_address & 0x8FFF) >> 8; // 1st byte extract
// printf(LPC_UART0,"%x02",set_addr);
I2C_Tx_Buf[1] = (uchar)(eep_address & 0xFF); // 2st byte extract
rxsetup.sl_addr7bit = E2PM24256_ID;
rxsetup.tx_data = I2C_Tx_Buf; // Get address to read at writing address
rxsetup.tx_length = 2;
rxsetup.rx_data = I2C_Rx_Buf;
rxsetup.rx_length = 1;
rxsetup.retransmissions_max = 3;
if (I2C_MasterTransferData(LPC_I2C0, &rxsetup, I2C_TRANSFER_POLLING) == SUCCESS)
{
return (I2C_Rx_Buf[0]);
}
else
{
return (-1);
}
}
/*********************************************************************//**
* @brief Reads array from given address
* @param[in] eep_address Word Address range[0000 - 4000]
* @return Byte value
**********************************************************************/
char I2C_IEeprom_Read (uint16_t eep_address, uint8_t* buf_data, uint16_t length)
{
/* Receive setup */
I2C_M_SETUP_Type rxsetup;
I2C_Tx_Buf[0] = (eep_address & 0x8FFF) >> 8;
// printf(LPC_UART0,"%x02",set_addr);
I2C_Tx_Buf[1] = (uchar)(eep_address & 0xFF); // 2st byte extract
rxsetup.sl_addr7bit = E2PM24256_ID;
rxsetup.tx_data = I2C_Tx_Buf; // Get address to read at writing address
rxsetup.tx_length = 2;
rxsetup.rx_data = buf_data;
rxsetup.rx_length = length;
rxsetup.retransmissions_max = 3;
if (I2C_MasterTransferData(LPC_I2C0, &rxsetup, I2C_TRANSFER_POLLING) == SUCCESS)
{
return (0);
}
else
{
return (-1);
}
}
/*********************************************************************//**
* @brief Display Read data stored in array
* @param[in] *dest_addr buffer address
* @param[in] length size of buffer
* @return None
**********************************************************************/
void Display_IEeprom_Array (uint8_t *string, uint16_t length)
{
while(length)
{
printf(LPC_UART0,"%x02 ",*string++);
length--;
}
}
/*********************************************************************//**
* @brief Ask for Address Range you want to display
* @param[in] *dest_addr buffer address
* @param[in] length size of buffer
* @return None
**********************************************************************/
void Display_IEeprom_Loc (uint16_t mem_start_address, uint16_t mem_end_address)
{
uint8_t line=0,count=0;
uint8_t dat;
uint16_t addr;
printf(LPC_UART0,"EEPROM Range = 0x000 - 0x7FF \r\n");
clr_scr_rst_cur(LPC_UART0);
printf(LPC_UART0,"Start: %x03 End: %x03 \r\n",mem_start_address,mem_end_address);
for(addr=mem_start_address; addr<mem_end_address+1; addr++)
{
if(count == 0) printf(LPC_UART0,"%x03 ",addr);
dat = I2C_IEeprom_Read_Byte(addr); // read byte from address
printf(LPC_UART0,"%x02 ",dat);
count++;
if(count == 16) // check for last digit entered
{
line++;
count = 0;
printf(LPC_UART0,"\r\n");
}
if(line == 16 || addr == mem_end_address)
{
printf(LPC_UART0,"\x1b[24;01HPress any key to continue.");
line = 0;
getche(LPC_UART0);
clr_scr_rst_cur(LPC_UART0);
}
}
}
/**
* @}
*/
/* End of Public Functions ---------------------------------------------------- */
/**
* @}
*/
/* --------------------------------- End Of File ------------------------------ */