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/*
* Copyright (c) 2006-2021, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2019-04-13 XiaojieFan the first version
* 2019-12-04 RenMing ADD PAGE WRITE and input address can be selected
* 2022-10-11 GuangweiRen Delay 2ms after writing one byte
*/
#include <rtthread.h>
#include <rtdevice.h>
#include <board.h>
#include <string.h>
#include <stdlib.h>
#define DBG_ENABLE
#define DBG_SECTION_NAME "at24xx"
#define DBG_LEVEL DBG_LOG
#define DBG_COLOR
#include <rtdbg.h>
#include "at24cxx.h"
#ifdef PKG_USING_AT24CXX
#define AT24CXX_ADDR (0xA0 >> 1) //A0 A1 A2 connect GND
#if (EE_TYPE == AT24C01)
#define AT24CXX_PAGE_BYTE 8
#define AT24CXX_MAX_MEM_ADDRESS 128
#elif (EE_TYPE == AT24C02)
#define AT24CXX_PAGE_BYTE 8
#define AT24CXX_MAX_MEM_ADDRESS 256
#elif (EE_TYPE == AT24C04)
#define AT24CXX_PAGE_BYTE 16
#define AT24CXX_MAX_MEM_ADDRESS 512
#elif (EE_TYPE == AT24C08)
#define AT24CXX_PAGE_BYTE 16
#define AT24CXX_MAX_MEM_ADDRESS 1024
#elif (EE_TYPE == AT24C16)
#define AT24CXX_PAGE_BYTE 16
#define AT24CXX_MAX_MEM_ADDRESS 2048
#elif (EE_TYPE == AT24C32)
#define AT24CXX_PAGE_BYTE 32
#define AT24CXX_MAX_MEM_ADDRESS 4096
#elif (EE_TYPE == AT24C64)
#define AT24CXX_PAGE_BYTE 32
#define AT24CXX_MAX_MEM_ADDRESS 8192
#elif (EE_TYPE == AT24C128)
#define AT24CXX_PAGE_BYTE 64
#define AT24CXX_MAX_MEM_ADDRESS 16384
#elif (EE_TYPE == AT24C256)
#define AT24CXX_PAGE_BYTE 64
#define AT24CXX_MAX_MEM_ADDRESS 32768
#elif (EE_TYPE == AT24C512)
#define AT24CXX_PAGE_BYTE 128
#define AT24CXX_MAX_MEM_ADDRESS 65536
#endif
static rt_err_t read_regs(at24cxx_device_t dev, rt_uint8_t len, rt_uint8_t *buf)
{
struct rt_i2c_msg msgs;
msgs.addr = AT24CXX_ADDR | dev->AddrInput;
msgs.flags = RT_I2C_RD;
msgs.buf = buf;
msgs.len = len;
if (rt_i2c_transfer(dev->i2c, &msgs, 1) == 1)
{
return RT_EOK;
}
else
{
return -RT_ERROR;
}
}
uint8_t at24cxx_read_one_byte(at24cxx_device_t dev, uint16_t readAddr)
{
rt_uint8_t buf[2];
rt_uint8_t temp;
#if (EE_TYPE > AT24C16)
buf[0] = (uint8_t)(readAddr>>8);
buf[1] = (uint8_t)readAddr;
if (rt_i2c_master_send(dev->i2c, AT24CXX_ADDR, 0, buf, 2) == 0)
#else
buf[0] = readAddr;
if (rt_i2c_master_send(dev->i2c, AT24CXX_ADDR | dev->AddrInput, 0, buf, 1) == 0)
#endif
{
return RT_ERROR;
}
read_regs(dev, 1, &temp);
return temp;
}
rt_err_t at24cxx_write_one_byte(at24cxx_device_t dev, uint16_t writeAddr, uint8_t dataToWrite)
{
rt_uint8_t buf[3];
#if (EE_TYPE > AT24C16)
buf[0] = (uint8_t)(writeAddr>>8);
buf[1] = (uint8_t)writeAddr;
buf[2] = dataToWrite;
if (rt_i2c_master_send(dev->i2c, AT24CXX_ADDR, 0, buf, 3) == 3)
#else
buf[0] = writeAddr; //cmd
buf[1] = dataToWrite;
//buf[2] = data[1];
if (rt_i2c_master_send(dev->i2c, AT24CXX_ADDR | dev->AddrInput, 0, buf, 2) == 2)
#endif
return RT_EOK;
else
return -RT_ERROR;
}
rt_err_t at24cxx_read_page(at24cxx_device_t dev, uint32_t readAddr, uint8_t *pBuffer, uint16_t numToRead)
{
struct rt_i2c_msg msgs[2];
uint8_t AddrBuf[2];
msgs[0].addr = AT24CXX_ADDR | dev->AddrInput;
msgs[0].flags = RT_I2C_WR ;
#if (EE_TYPE > AT24C16)
AddrBuf[0] = readAddr >> 8;
AddrBuf[1] = readAddr;
msgs[0].buf = AddrBuf;
msgs[0].len = 2;
#else
AddrBuf[0] = readAddr;
msgs[0].buf = AddrBuf;
msgs[0].len = 1;
#endif
msgs[1].addr = AT24CXX_ADDR | dev->AddrInput;
msgs[1].flags = RT_I2C_RD;
msgs[1].buf = pBuffer;
msgs[1].len = numToRead;
if(rt_i2c_transfer(dev->i2c, msgs, 2) <= 0)
{
return RT_ERROR;
}
return RT_EOK;
}
rt_err_t at24cxx_write_page(at24cxx_device_t dev, uint32_t wirteAddr, uint8_t *pBuffer, uint16_t numToWrite)
{
struct rt_i2c_msg msgs[2];
uint8_t AddrBuf[2];
msgs[0].addr = AT24CXX_ADDR | dev->AddrInput;
msgs[0].flags = RT_I2C_WR ;
#if (EE_TYPE > AT24C16)
AddrBuf[0] = wirteAddr >> 8;
AddrBuf[1] = wirteAddr;
msgs[0].buf = AddrBuf;
msgs[0].len = 2;
#else
AddrBuf[0] = wirteAddr;
msgs[0].buf = AddrBuf;
msgs[0].len = 1;
#endif
msgs[1].addr = AT24CXX_ADDR | dev->AddrInput;
msgs[1].flags = RT_I2C_WR | RT_I2C_NO_START;
msgs[1].buf = pBuffer;
msgs[1].len = numToWrite;
if(rt_i2c_transfer(dev->i2c, msgs, 2) <= 0)
{
return RT_ERROR;
}
return RT_EOK;
}
rt_err_t at24cxx_check(at24cxx_device_t dev)
{
uint8_t temp;
RT_ASSERT(dev);
temp = at24cxx_read_one_byte(dev, AT24CXX_MAX_MEM_ADDRESS - 1);
if (temp == 0x55) return RT_EOK;
else
{
at24cxx_write_one_byte(dev, AT24CXX_MAX_MEM_ADDRESS - 1, 0x55);
rt_thread_mdelay(EE_TWR); // wait 5ms befor next operation
temp = at24cxx_read_one_byte(dev, AT24CXX_MAX_MEM_ADDRESS - 1);
if (temp == 0x55) return RT_EOK;
}
return RT_ERROR;
}
/**
* This function read the specific numbers of data to the specific position
*
* @param bus the name of at24cxx device
* @param ReadAddr the start position to read
* @param pBuffer the read data store position
* @param NumToRead
* @return RT_EOK write ok.
*/
rt_err_t at24cxx_read(at24cxx_device_t dev, uint32_t ReadAddr, uint8_t *pBuffer, uint16_t NumToRead)
{
rt_err_t result;
RT_ASSERT(dev);
if(ReadAddr + NumToRead > AT24CXX_MAX_MEM_ADDRESS)
{
return RT_ERROR;
}
result = rt_mutex_take(dev->lock, RT_WAITING_FOREVER);
if (result == RT_EOK)
{
while (NumToRead)
{
*pBuffer++ = at24cxx_read_one_byte(dev, ReadAddr++);
NumToRead--;
}
}
else
{
LOG_E("The at24cxx could not respond at this time. Please try again");
}
rt_mutex_release(dev->lock);
return RT_EOK;
}
/**
* This function read the specific numbers of data to the specific position
*
* @param bus the name of at24cxx device
* @param ReadAddr the start position to read
* @param pBuffer the read data store position
* @param NumToRead
* @return RT_EOK write ok.
*/
rt_err_t at24cxx_page_read(at24cxx_device_t dev, uint32_t ReadAddr, uint8_t *pBuffer, uint16_t NumToRead)
{
rt_err_t result = RT_EOK;
uint16_t pageReadSize = AT24CXX_PAGE_BYTE - ReadAddr % AT24CXX_PAGE_BYTE;
RT_ASSERT(dev);
if(ReadAddr + NumToRead > AT24CXX_MAX_MEM_ADDRESS)
{
return RT_ERROR;
}
result = rt_mutex_take(dev->lock, RT_WAITING_FOREVER);
if(result == RT_EOK)
{
while (NumToRead)
{
if(NumToRead > pageReadSize)
{
if(at24cxx_read_page(dev, ReadAddr, pBuffer, pageReadSize))
{
result = RT_ERROR;
}
ReadAddr += pageReadSize;
pBuffer += pageReadSize;
NumToRead -= pageReadSize;
pageReadSize = AT24CXX_PAGE_BYTE;
}
else
{
if(at24cxx_read_page(dev, ReadAddr, pBuffer, NumToRead))
{
result = RT_ERROR;
}
NumToRead = 0;
}
}
}
else
{
LOG_E("The at24cxx could not respond at this time. Please try again");
}
rt_mutex_release(dev->lock);
return result;
}
/**
* This function write the specific numbers of data to the specific position
*
* @param bus the name of at24cxx device
* @param WriteAddr the start position to write
* @param pBuffer the data need to write
* @param NumToWrite
* @return RT_EOK write ok.at24cxx_device_t dev
*/
rt_err_t at24cxx_write(at24cxx_device_t dev, uint32_t WriteAddr, uint8_t *pBuffer, uint16_t NumToWrite)
{
uint16_t i = 0;
rt_err_t result;
RT_ASSERT(dev);
if(WriteAddr + NumToWrite > AT24CXX_MAX_MEM_ADDRESS)
{
return RT_ERROR;
}
result = rt_mutex_take(dev->lock, RT_WAITING_FOREVER);
if (result == RT_EOK)
{
while (1) //NumToWrite--
{
if (at24cxx_write_one_byte(dev, WriteAddr, pBuffer[i]) == RT_EOK)
{
rt_thread_mdelay(2);
WriteAddr++;
}
if (++i == NumToWrite)
{
break;
}
rt_thread_mdelay(EE_TWR);
}
}
else
{
LOG_E("The at24cxx could not respond at this time. Please try again");
}
rt_mutex_release(dev->lock);
return RT_EOK;
}
/**
* This function write the specific numbers of data to the specific position
*
* @param bus the name of at24cxx device
* @param WriteAddr the start position to write
* @param pBuffer the data need to write
* @param NumToWrite
* @return RT_EOK write ok.at24cxx_device_t dev
*/
rt_err_t at24cxx_page_write(at24cxx_device_t dev, uint32_t WriteAddr, uint8_t *pBuffer, uint16_t NumToWrite)
{
rt_err_t result = RT_EOK;
uint16_t pageWriteSize = AT24CXX_PAGE_BYTE - WriteAddr % AT24CXX_PAGE_BYTE;
RT_ASSERT(dev);
if(WriteAddr + NumToWrite > AT24CXX_MAX_MEM_ADDRESS)
{
return RT_ERROR;
}
result = rt_mutex_take(dev->lock, RT_WAITING_FOREVER);
if(result == RT_EOK)
{
while (NumToWrite)
{
if(NumToWrite > pageWriteSize)
{
if(at24cxx_write_page(dev, WriteAddr, pBuffer, pageWriteSize))
{
result = RT_ERROR;
}
rt_thread_mdelay(EE_TWR); // wait 5ms befor next operation
WriteAddr += pageWriteSize;
pBuffer += pageWriteSize;
NumToWrite -= pageWriteSize;
pageWriteSize = AT24CXX_PAGE_BYTE;
}
else
{
if(at24cxx_write_page(dev, WriteAddr, pBuffer, NumToWrite))
{
result = RT_ERROR;
}
rt_thread_mdelay(EE_TWR); // wait 5ms befor next operation
NumToWrite = 0;
}
}
}
else
{
LOG_E("The at24cxx could not respond at this time. Please try again");
}
rt_mutex_release(dev->lock);
return result;
}
/**
* This function initializes at24cxx registered device driver
*
* @param dev the name of at24cxx device
*
* @return the at24cxx device.
*/
at24cxx_device_t at24cxx_init(const char *i2c_bus_name, uint8_t AddrInput)
{
at24cxx_device_t dev;
RT_ASSERT(i2c_bus_name);
dev = rt_calloc(1, sizeof(struct at24cxx_device));
if (dev == RT_NULL)
{
LOG_E("Can't allocate memory for at24cxx device on '%s' ", i2c_bus_name);
return RT_NULL;
}
dev->i2c = rt_i2c_bus_device_find(i2c_bus_name);
if (dev->i2c == RT_NULL)
{
LOG_E("Can't find at24cxx device on '%s' ", i2c_bus_name);
rt_free(dev);
return RT_NULL;
}
dev->lock = rt_mutex_create("mutex_at24cxx", RT_IPC_FLAG_FIFO);
if (dev->lock == RT_NULL)
{
LOG_E("Can't create mutex for at24cxx device on '%s' ", i2c_bus_name);
rt_free(dev);
return RT_NULL;
}
dev->AddrInput = AddrInput;
return dev;
}
/**
* This function releases memory and deletes mutex lock
*
* @param dev the pointer of device driver structure
*/
void at24cxx_deinit(at24cxx_device_t dev)
{
RT_ASSERT(dev);
rt_mutex_delete(dev->lock);
rt_free(dev);
}
uint8_t TEST_BUFFER[] = "WELCOM TO RTT";
#define SIZE sizeof(TEST_BUFFER)
void at24cxx(int argc, char *argv[])
{
static at24cxx_device_t dev = RT_NULL;
if (argc > 1)
{
if (!strcmp(argv[1], "probe"))
{
if (argc > 2)
{
/* initialize the sensor when first probe */
if (!dev || strcmp(dev->i2c->parent.parent.name, argv[2]))
{
/* deinit the old device */
if (dev)
{
at24cxx_deinit(dev);
}
dev = at24cxx_init(argv[2], atoi(argv[3]));
}
}
else
{
rt_kprintf("at24cxx probe <dev_name> <AddrInput> - probe sensor by given name\n");
}
}
else if (!strcmp(argv[1], "read"))
{
if (dev)
{
uint8_t testbuffer[50];
/* read the eeprom data */
at24cxx_read(dev, 0, testbuffer, SIZE);
rt_kprintf("read at24cxx : %s\n", testbuffer);
}
else
{
rt_kprintf("Please using 'at24cxx probe <dev_name>' first\n");
}
}
else if (!strcmp(argv[1], "write"))
{
at24cxx_write(dev, 0, TEST_BUFFER, SIZE);
rt_kprintf("write ok\n");
}
else if (!strcmp(argv[1], "check"))
{
if (at24cxx_check(dev) == 1)
{
rt_kprintf("check faild \n");
}
}
else
{
rt_kprintf("Unknown command. Please enter 'at24cxx0' for help\n");
}
}
else
{
rt_kprintf("Usage:\n");
rt_kprintf("at24cxx probe <dev_name> - probe eeprom by given name\n");
rt_kprintf("at24cxx check - check eeprom at24cxx \n");
rt_kprintf("at24cxx read - read eeprom at24cxx data\n");
rt_kprintf("at24cxx write - write eeprom at24cxx data\n");
}
}
MSH_CMD_EXPORT(at24cxx, at24cxx eeprom function);
#endif
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