Juan Ciafardini
se quito el led de debug de la bibilioteca
Diff: eeprom.cpp
- Revision:
- 0:80245aff63ce
- Child:
- 1:a262173cac81
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/eeprom.cpp Sat Jul 14 08:20:06 2012 +0000
@@ -0,0 +1,821 @@
+/***********************************************************
+Author: Bernard Borredon
+Date: 27 december 2011
+Version: 1.0
+************************************************************/
+#include "eeprom.h"
+
+#define BIT_SET(x,n) (x=x | (0x01<<n))
+#define BIT_TEST(x,n) (x & (0x01<<n))
+#define BIT_CLEAR(x,n) (x=x & ~(0x01<<n))
+
+EEPROM::EEPROM(PinName sda, PinName scl, uint8_t address, TypeEeprom type) : _i2c(sda, scl)
+{
+
+ _errnum = EEPROM_NoError;
+ _type = type;
+
+ // Check address range
+ _address = address;
+ switch(type) {
+ case T24C01 :
+ case T24C02 :
+ if(address > 7) {
+ _errnum = EEPROM_BadAddress;
+ }
+ _address = _address << 1;
+ _page_write = 8;
+ _page_number = 1;
+ break;
+ case T24C04 :
+ if(address > 7) {
+ _errnum = EEPROM_BadAddress;
+ }
+ _address = (_address & 0xFE) << 1;
+ _page_write = 16;
+ _page_number = 2;
+ break;
+ case T24C08 :
+ if(address > 7) {
+ _errnum = EEPROM_BadAddress;
+ }
+ _address = (_address & 0xFC) << 1;
+ _page_write = 16;
+ _page_number = 4;
+ break;
+ case T24C16 :
+ _address = 0;
+ _page_write = 16;
+ _page_number = 8;
+ break;
+ case T24C32 :
+ case T24C64 :
+ if(address > 7) {
+ _errnum = EEPROM_BadAddress;
+ }
+ _address = _address << 1;
+ _page_write = 32;
+ _page_number = 1;
+ break;
+ case T24C128 :
+ case T24C256 :
+ if(address > 3) {
+ _errnum = EEPROM_BadAddress;
+ }
+ _address = _address << 1;
+ _page_write = 64;
+ _page_number = 1;
+ break;
+ case T24C512 :
+ if(address > 3) {
+ _errnum = EEPROM_BadAddress;
+ }
+ _address = _address << 1;
+ _page_write = 128;
+ _page_number = 1;
+ break;
+ case T24C1024 :
+ if(address > 7) {
+ _errnum = EEPROM_BadAddress;
+ }
+ _address = (_address & 0xFE) << 1;
+ _page_write = 128;
+ _page_number = 2;
+ break;
+ case T24C1025 :
+ if(address > 3) {
+ _errnum = EEPROM_BadAddress;
+ }
+ _address = _address << 1;
+ _page_write = 128;
+ _page_number = 2;
+ break;
+ }
+
+ // Size in bytes
+ _size = _type;
+ if(_type == T24C1025)
+ _size = T24C1024;
+
+ // Set I2C frequency
+ _i2c.frequency(400000);
+}
+
+void EEPROM::write(uint16_t address, int8_t data)
+{
+ uint8_t page;
+ uint8_t addr;
+ uint8_t cmd[3];
+ int len;
+ int ack;
+
+ // Check error
+ if(_errnum)
+ return;
+
+ // Check address
+ if(!checkAddress(address)) {
+ _errnum = EEPROM_OutOfRange;
+ return;
+ }
+
+ // Compute page number
+ page = 0;
+ if(_type < T24C32)
+ page = (uint8_t) (address / 256);
+
+ // Device address
+ addr = EEPROM_Address | _address | (page << 1);
+
+ if(_type < T24C32) {
+ len = 2;
+
+ // Word address
+ cmd[0] = (uint8_t) (address - page * 256);
+
+ // Data
+ cmd[1] = (uint8_t) data;
+ }
+ else {
+ len = 3;
+
+ // First word address (MSB)
+ cmd[0] = (uint8_t) (address >> 8);
+
+ // Second word address (LSB)
+ cmd[1] = (uint8_t) address;
+
+ // Data
+ cmd[2] = (uint8_t) data;
+ }
+
+ //printf("len %d address %02x cmd[0] %02x cmd[1] %02x cmd[2] %02x\n",len,addr,cmd[0],cmd[1],cmd[2]);
+
+ ack = _i2c.write((int)addr,(char *)cmd,len);
+ if(ack != 0) {
+ _errnum = EEPROM_I2cError;
+ return;
+ }
+
+ // Wait end of write
+ ready();
+
+}
+
+void EEPROM::write(uint16_t address, int8_t data[], uint16_t length)
+{
+ uint8_t page;
+ uint8_t addr;
+ uint8_t blocs,remain;
+ uint8_t fpart,lpart;
+ uint8_t i,j,ind;
+ uint8_t cmd[129];
+ int ack;
+
+ // Check error
+ if(_errnum)
+ return;
+
+ // Check address
+ if(!checkAddress(address)) {
+ _errnum = EEPROM_OutOfRange;
+ return;
+ }
+
+ // Check length
+ if(!checkAddress(address + length - 1)) {
+ _errnum = EEPROM_OutOfRange;
+ return;
+ }
+
+ // Compute blocs numbers
+ blocs = length / _page_write;
+
+ // Compute remaining bytes
+ remain = length - blocs * _page_write;
+
+ for(i = 0;i < blocs;i++) {
+ // Compute page number
+ page = 0;
+ if(_type < T24C32)
+ page = (uint8_t) (address / 256);
+
+ // Device address
+ addr = EEPROM_Address | _address | (page << 1);
+
+ if(_type < T24C32) {
+ // Word address
+ cmd[0] = (uint8_t) (address - page * 256);
+
+ if((uint8_t) ((address + _page_write) / 256) == page) { // Data fit in the same page
+ // Add data
+ for(j = 0;j < _page_write;j++)
+ cmd[j + 1] = (uint8_t) data[i * _page_write + j];
+
+ // Write data
+ ack = _i2c.write((int)addr,(char *)cmd,_page_write + 1);
+ if(ack != 0) {
+ _errnum = EEPROM_I2cError;
+ return;
+ }
+
+ // Wait end of write
+ ready();
+
+ // Increment address
+ address += _page_write;
+ }
+ else { // Data on 2 pages. We must split the write
+ // Number of bytes in current page
+ fpart = (page + 1) * 256 - address;
+
+ // Add data for current page
+ for(j = 0;j < fpart;j++)
+ cmd[j + 1] = (uint8_t) data[i * _page_write + j];
+
+ // Write data for current page
+ ack = _i2c.write((int)addr,(char *)cmd,fpart + 1);
+ if(ack != 0) {
+ _errnum = EEPROM_I2cError;
+ return;
+ }
+
+ // Wait end of write
+ ready();
+
+ // Increment address
+ address += fpart;
+
+ if(page < _page_number - 1) {
+ // Increment page
+ page++;
+
+ // Device address
+ addr = EEPROM_Address | _address | (page << 1);
+
+ // Word address
+ cmd[0] = (uint8_t) (address - page * 256);
+
+ // Data index
+ ind = i * _page_write + fpart;
+
+ // Number of bytes in next page
+ lpart = _page_write - fpart;
+
+ // Add data for next page
+ for(j = 0;j < lpart;j++)
+ cmd[j + 1] = (uint8_t) data[ind + j];
+
+ // Write data for next page
+ ack = _i2c.write((int)addr,(char *)cmd,lpart + 1);
+ if(ack != 0) {
+ _errnum = EEPROM_I2cError;
+ return;
+ }
+
+ // Wait end of write
+ ready();
+
+ // Increment address
+ address += lpart;
+ }
+ }
+ }
+ else {
+ // First word address (MSB)
+ cmd[0] = (uint8_t) (address >> 8);
+
+ // Second word address (LSB)
+ cmd[1] = (uint8_t) address;
+
+ // Add data
+ for(j = 0;j < _page_write;j++)
+ cmd[j + 2] = (uint8_t) data[i * _page_write + j];
+
+ // Write data
+ ack = _i2c.write((int)addr,(char *)cmd,_page_write + 2);
+ if(ack != 0) {
+ _errnum = EEPROM_I2cError;
+ return;
+ }
+
+ // Wait end of write
+ ready();
+
+ // Increment address
+ address += _page_write;
+ }
+ }
+
+ // Compute page number
+ page = 0;
+ if(_type < T24C32)
+ page = (uint8_t) (address / 256);
+
+ // Device address
+ addr = EEPROM_Address | _address | (page << 1);
+
+ if(_type < T24C32) {
+ // Word address
+ cmd[0] = (uint8_t) (address - page * 256);
+
+ if((uint8_t) ((address + remain) / 256) == page) { // Data fit in the same page
+ // Add data for the current page
+ for(j = 0;j < remain;j++)
+ cmd[j + 1] = (uint8_t) data[blocs * _page_write + j];
+
+ // Write data for the current page
+ ack = _i2c.write((int)addr,(char *)cmd,remain + 1);
+ if(ack != 0) {
+ _errnum = EEPROM_I2cError;
+ return;
+ }
+
+ // Wait end of write
+ ready();
+ }
+ else { // Data on 2 pages. We must split the write
+ // Number of bytes in current page
+ fpart = (page + 1) * 256 - address;
+
+ // Add data for current page
+ for(j = 0;j < fpart;j++)
+ cmd[j + 1] = (uint8_t) data[blocs * _page_write + j];
+
+ // Write data for current page
+ ack = _i2c.write((int)addr,(char *)cmd,fpart + 1);
+ if(ack != 0) {
+ _errnum = EEPROM_I2cError;
+ return;
+ }
+
+ // Wait end of write
+ ready();
+
+ // Increment address
+ address += fpart;
+
+ if(page < _page_number - 1) {
+ // Increment page
+ page++;
+
+ // Device address
+ addr = EEPROM_Address | _address | (page << 1);
+
+ // Word address
+ cmd[0] = (uint8_t) (address - page * 256);
+
+ // Data index
+ ind = blocs * _page_write + fpart;
+
+ // Number of bytes in next page
+ lpart = remain - fpart;
+
+ // Add data for next page
+ for(j = 0;j < lpart;j++)
+ cmd[j + 1] = (uint8_t) data[ind + j];
+
+ // Write data for next page
+ ack = _i2c.write((int)addr,(char *)cmd,lpart + 1);
+ if(ack != 0) {
+ _errnum = EEPROM_I2cError;
+ return;
+ }
+
+ // Wait end of write
+ ready();
+ }
+ }
+ }
+ else {
+ // Fist word address (MSB)
+ cmd[0] = (uint8_t) (address >> 8);
+
+ // Second word address (LSB)
+ cmd[1] = (uint8_t) address;
+
+ // Add data for the current page
+ for(j = 0;j < remain;j++)
+ cmd[j + 2] = (uint8_t) data[blocs * _page_write + j];
+
+ // Write data for the current page
+ ack = _i2c.write((int)addr,(char *)cmd,remain + 2);
+ if(ack != 0) {
+ _errnum = EEPROM_I2cError;
+ return;
+ }
+
+ // Wait end of write
+ ready();
+ }
+
+}
+
+void EEPROM::write(uint16_t address, int16_t data)
+{
+ int8_t cmd[2];
+
+ // Check error
+ if(_errnum)
+ return;
+
+ // Check address
+ if(!checkAddress(address + 1)) {
+ _errnum = EEPROM_OutOfRange;
+ return;
+ }
+
+ memcpy(cmd,&data,2);
+
+ write(address,cmd,2);
+
+}
+
+void EEPROM::write(uint16_t address, int32_t data)
+{
+ int8_t cmd[4];
+
+ // Check error
+ if(_errnum)
+ return;
+
+ // Check address
+ if(!checkAddress(address + 3)) {
+ _errnum = EEPROM_OutOfRange;
+ return;
+ }
+
+ memcpy(cmd,&data,4);
+
+ write(address,cmd,4);
+
+}
+
+void EEPROM::write(uint16_t address, float data)
+{
+ int8_t cmd[4];
+
+ // Check error
+ if(_errnum)
+ return;
+
+ // Check address
+ if(!checkAddress(address + 3)) {
+ _errnum = EEPROM_OutOfRange;
+ return;
+ }
+
+ memcpy(cmd,&data,4);
+
+ write(address,cmd,4);
+
+}
+
+void EEPROM::write(uint16_t address, void *data, uint16_t size)
+{
+ int8_t *cmd = NULL;
+
+ // Check error
+ if(_errnum)
+ return;
+
+ // Check address
+ if(!checkAddress(address + size - 1)) {
+ _errnum = EEPROM_OutOfRange;
+ return;
+ }
+
+ cmd = (int8_t *)malloc(size);
+ if(cmd == NULL) {
+ _errnum = EEPROM_MallocError;
+ return;
+ }
+
+ memcpy(cmd,data,size);
+
+ write(address,cmd,size);
+
+ free(cmd);
+
+}
+
+void EEPROM::read(uint16_t address, int8_t& data)
+{
+ uint8_t page;
+ uint8_t addr;
+ uint8_t cmd[2];
+ uint8_t len;
+ int ack;
+
+ // Check error
+ if(_errnum)
+ return;
+
+ // Check address
+ if(!checkAddress(address)) {
+ _errnum = EEPROM_OutOfRange;
+ return;
+ }
+
+ // Compute page number
+ page = 0;
+ if(_type < T24C32)
+ page = (uint8_t) (address / 256);
+
+ // Device address
+ addr = EEPROM_Address | _address | (page << 1);
+
+ if(_type < T24C32) {
+ len = 1;
+
+ // Word address
+ cmd[0] = (uint8_t) (address - page * 256);
+ }
+ else {
+ len = 2;
+
+ // First word address (MSB)
+ cmd[0] = (uint8_t) (address >> 8);
+
+ // Second word address (LSB)
+ cmd[1] = (uint8_t)address;
+ }
+
+ // Write command
+ ack = _i2c.write((int)addr,(char *)cmd,len,true);
+ if(ack != 0) {
+ _errnum = EEPROM_I2cError;
+ return;
+ }
+
+ // Read data
+ ack = _i2c.read((int)addr,(char *)&data,sizeof(data));
+ if(ack != 0) {
+ _errnum = EEPROM_I2cError;
+ return;
+ }
+
+}
+
+void EEPROM::read(uint16_t address, int8_t *data, uint16_t size)
+{
+ uint8_t page;
+ uint8_t addr;
+ uint8_t cmd[2];
+ uint8_t len;
+ int ack;
+
+ // Check error
+ if(_errnum)
+ return;
+
+ // Check address
+ if(!checkAddress(address)) {
+ _errnum = EEPROM_OutOfRange;
+ return;
+ }
+
+ // Check size
+ if(!checkAddress(address + size - 1)) {
+ _errnum = EEPROM_OutOfRange;
+ return;
+ }
+
+ // Compute page number
+ page = 0;
+ if(_type < T24C32)
+ page = (uint8_t) (address / 256);
+
+ // Device address
+ addr = EEPROM_Address | _address | (page << 1);
+
+ if(_type < T24C32) {
+ len = 1;
+
+ // Word address
+ cmd[0] = (uint8_t) (address - page * 256);
+ }
+ else {
+ len = 2;
+
+ // First word address (MSB)
+ cmd[0] = (uint8_t) (address >> 8);
+
+ // Second word address (LSB)
+ cmd[1] = (uint8_t) address;
+ }
+
+ // Write command
+ ack = _i2c.write((int)addr,(char *)cmd,len,true);
+ if(ack != 0) {
+ _errnum = EEPROM_I2cError;
+ return;
+ }
+
+ // Sequential read
+ ack = _i2c.read((int)addr,(char *)data,size);
+ if(ack != 0) {
+ _errnum = EEPROM_I2cError;
+ return;
+ }
+
+}
+
+void EEPROM::read(int8_t& data)
+{
+ uint8_t addr;
+ int ack;
+
+ // Check error
+ if(_errnum)
+ return;
+
+ // Device address
+ addr = EEPROM_Address | _address;
+
+ // Read data
+ ack = _i2c.read((int)addr,(char *)&data,sizeof(data));
+ if(ack != 0) {
+ _errnum = EEPROM_I2cError;
+ return;
+ }
+
+}
+
+void EEPROM::read(uint16_t address, int16_t& data)
+{
+ int8_t cmd[2];
+
+ // Check error
+ if(_errnum)
+ return;
+
+ // Check address
+ if(!checkAddress(address + 1)) {
+ _errnum = EEPROM_OutOfRange;
+ return;
+ }
+
+ read(address,cmd,2);
+
+ memcpy(&data,cmd,2);
+
+}
+
+void EEPROM::read(uint16_t address, int32_t& data)
+{
+ int8_t cmd[4];
+
+ // Check error
+ if(_errnum)
+ return;
+
+ // Check address
+ if(!checkAddress(address + 3)) {
+ _errnum = EEPROM_OutOfRange;
+ return;
+ }
+
+ read(address,cmd,4);
+
+ memcpy(&data,cmd,4);
+
+}
+
+void EEPROM::read(uint16_t address, float& data)
+{
+ int8_t cmd[4];
+
+ // Check error
+ if(_errnum)
+ return;
+
+ // Check address
+ if(!checkAddress(address + 3)) {
+ _errnum = EEPROM_OutOfRange;
+ return;
+ }
+
+ read(address,cmd,4);
+
+ memcpy(&data,cmd,4);
+
+}
+
+void EEPROM::read(uint16_t address, void *data, uint16_t size)
+{
+ int8_t *cmd = NULL;
+
+ // Check error
+ if(_errnum)
+ return;
+
+ // Check address
+ if(!checkAddress(address + size - 1)) {
+ _errnum = EEPROM_OutOfRange;
+ return;
+ }
+
+ cmd = (int8_t *)malloc(size);
+ if(cmd == NULL) {
+ _errnum = EEPROM_MallocError;
+ return;
+ }
+
+ read(address,cmd,size);
+
+ memcpy(data,cmd,size);
+
+ free(cmd);
+
+}
+
+void EEPROM::ready(void)
+{
+ int ack;
+ uint8_t addr;
+ uint8_t cmd;
+
+ // Check error
+ if(_errnum)
+ return;
+
+ // Device address
+ addr = EEPROM_Address | _address;
+
+ cmd = 0;
+
+ // Wait end of write
+ do {
+ ack = _i2c.write((int)addr,(char *)cmd,0);
+ } while(ack != 0);
+
+}
+
+uint32_t EEPROM::getSize(void)
+{
+ return(_size);
+}
+
+uint8_t EEPROM::getError(void)
+{
+ return(_errnum);
+}
+
+bool EEPROM::checkAddress(uint16_t address)
+{
+ bool ret = true;
+
+ switch(_type) {
+ case T24C01 :
+ if(address >= T24C01)
+ ret = false;
+ break;
+ case T24C02 :
+ if(address >= T24C02)
+ ret = false;
+ break;
+ case T24C04 :
+ if(address >= T24C04)
+ ret = false;
+ break;
+ case T24C08 :
+ if(address >= T24C08)
+ ret = false;
+ break;
+ case T24C16 :
+ if(address >= T24C16)
+ ret = false;
+ break;
+ case T24C32 :
+ if(address >= T24C32)
+ ret = false;
+ break;
+ case T24C64 :
+ if(address >= T24C64)
+ ret = false;
+ break;
+ case T24C128 :
+ if(address >= T24C128)
+ ret = false;
+ break;
+ case T24C256 :
+ if(address >= T24C256)
+ ret = false;
+ break;
+ case T24C512 :
+ if(address >= T24C512)
+ ret = false;
+ break;
+ case T24C1024 :
+ if(address >= T24C1024)
+ ret = false;
+ break;
+ case T24C1025 :
+ if(address >= T24C1025 - 1)
+ ret = false;
+ break;
+ }
+
+ return(ret);
+}
\ No newline at end of file