Revision 0:770fea48cb00, committed 2017-03-03

Comitter:

sameera0824

Date:

Fri Mar 03 11:36:09 2017 +0000

Commit message:

EEPROM example

Changed in this revision

diff -r 000000000000 -r 770fea48cb00 eeprom.lib
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/eeprom.lib	Fri Mar 03 11:36:09 2017 +0000
@@ -0,0 +1,1 @@
+http://developer.mbed.org/users/bborredon/code/eeprom/#925096a4c7f0

diff -r 000000000000 -r 770fea48cb00 main.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Fri Mar 03 11:36:09 2017 +0000
@@ -0,0 +1,321 @@
+// Example
+
+#include <string>
+
+#include "mbed.h"
+#include "eeprom.h"
+
+#define EEPROM_ADDR 0x0   // I2c EEPROM address is 0x00
+
+#define SDA p9            // I2C SDA pin
+#define SCL p10           // I2C SCL pin
+
+#define MIN(X,Y) ((X) < (Y) ? (X) : (Y))
+#define MAX(X,Y) ((X) > (Y) ? (X) : (Y))
+
+DigitalOut led2(LED2);
+
+typedef struct _MyData {
+                         int16_t sdata;
+                         int32_t idata;
+                         float fdata;
+                       } MyData;
+
+static void myerror(std::string msg)
+{
+  printf("Error %s\n",msg.c_str());
+  exit(1);
+}
+
+void eeprom_test(void)
+{
+  EEPROM ep(SDA,SCL,EEPROM_ADDR,EEPROM::T24C64);  // 24C64 eeprom with sda = p9 and scl = p10
+  uint8_t data[256],data_r[256];
+  int8_t ival;
+  uint16_t s;
+  int16_t sdata,sdata_r;
+  int32_t ldata[1024];
+  int32_t eeprom_size,max_size;
+  uint32_t addr;
+  int32_t idata,idata_r;
+  uint32_t i,j,k,l,t,id;
+  float fdata,fdata_r;
+  MyData md,md_r;
+    
+  eeprom_size = ep.getSize();
+  max_size = MIN(eeprom_size,256);
+  
+  printf("Test EEPROM I2C model %s of %d bytes\n\n",ep.getName(),eeprom_size);
+  
+  // Test sequential read byte (max_size first bytes)
+  for(i = 0;i < max_size;i++) {
+     ep.read(i,ival);
+     data_r[i] = ival;
+     if(ep.getError() != 0)
+       myerror(ep.getErrorMessage());
+  }
+  
+  printf("Test sequential read %d first bytes :\n",max_size);
+  for(i = 0;i < max_size/16;i++) {
+     for(j = 0;j < 16;j++) {
+        addr = i * 16 + j;
+        printf("%3d ",(uint8_t)data_r[addr]);
+     }
+     printf("\n");
+  }
+    
+    // Test sequential read byte (max_size last bytes)
+  for(i = 0;i < max_size;i++) {
+        addr = eeprom_size - max_size + i;
+    ep.read(addr,ival);
+    data_r[i] = ival;
+    if(ep.getError() != 0)
+      myerror(ep.getErrorMessage());
+  }
+  
+  printf("\nTest sequential read %d last bytes :\n",max_size);
+  for(i = 0;i < max_size/16;i++) {
+     for(j = 0;j < 16;j++) {
+        addr = i * 16 + j;
+        printf("%3d ",(uint8_t)data_r[addr]);
+     }
+     printf("\n");
+  }
+  
+  // Test write byte (max_size first bytes)
+  for(i = 0;i < max_size;i++)
+     data[i] = i;
+  
+  for(i = 0;i < max_size;i++) {
+     ep.write(i,(int8_t)data[i]);
+     if(ep.getError() != 0)
+       myerror(ep.getErrorMessage());
+  }
+  
+  // Test read byte (max_size first bytes)
+  for(i = 0;i < max_size;i++) {
+     ep.read(i,(int8_t&)ival);
+     data_r[i] = (uint8_t)ival;
+     if(ep.getError() != 0)
+       myerror(ep.getErrorMessage());
+  }
+  
+  printf("\nTest write and read %d first bytes :\n",max_size);
+  for(i = 0;i < max_size/16;i++) {
+     for(j = 0;j < 16;j++) {
+        addr = i * 16 + j;
+        printf("%3d ",(uint8_t)data_r[addr]);
+     }
+     printf("\n");
+  }
+  
+  // Test current address read byte (max_size first bytes)
+  ep.read((uint32_t)0,(int8_t&)ival); // current address is 0
+  data_r[0] = (uint8_t)ival;
+  if(ep.getError() != 0)
+    myerror(ep.getErrorMessage());
+  
+  for(i = 1;i < max_size;i++) {
+     ep.read((int8_t&)ival);
+     data_r[i] = (uint8_t)ival;
+     if(ep.getError() != 0)
+       myerror(ep.getErrorMessage());
+  }
+  
+  printf("\nTest current address read %d first bytes :\n",max_size);
+  for(i = 0;i < max_size/16;i++) {
+     for(j = 0;j < 16;j++) {
+        addr = i * 16 + j;
+        printf("%3d ",(uint8_t)data_r[addr]);
+     }
+     printf("\n");
+  }
+   
+  // Test sequential read byte (first max_size bytes)
+  ep.read((uint32_t)0,(int8_t *)data_r,(uint32_t) max_size);
+  if(ep.getError() != 0)
+    myerror(ep.getErrorMessage());
+  
+  printf("\nTest sequential read %d first bytes :\n",max_size);
+  for(i = 0;i < max_size/16;i++) {
+     for(j = 0;j < 16;j++) {
+        addr = i * 16 + j;
+        printf("%3d ",(uint8_t)data_r[addr]);
+     }
+     printf("\n");
+  }
+  
+  // Test write short, long, float 
+  sdata = -15202;
+    addr = eeprom_size - 16;
+  ep.write(addr,(int16_t)sdata); // short write at address eeprom_size - 16
+  if(ep.getError() != 0)
+    myerror(ep.getErrorMessage());
+  
+  idata = 45123;
+    addr = eeprom_size - 12;
+  ep.write(addr,(int32_t)idata); // long write at address eeprom_size - 12
+  if(ep.getError() != 0)
+    myerror(ep.getErrorMessage());
+    
+  fdata = -12.26;
+    addr = eeprom_size - 8;
+  ep.write(addr,(float)fdata); // float write at address eeprom_size - 8
+  if(ep.getError() != 0)
+    myerror(ep.getErrorMessage());
+  
+  // Test read short, long, float
+  printf("\nTest write and read short (%d), long (%d), float (%f) :\n",
+           sdata,idata,fdata);  
+  
+  ep.read((uint32_t)(eeprom_size - 16),(int16_t&)sdata_r);
+  if(ep.getError() != 0)
+    myerror(ep.getErrorMessage());
+  printf("sdata %d\n",sdata_r);
+  
+  ep.read((uint32_t)(eeprom_size - 12),(int32_t&)idata_r);
+  if(ep.getError() != 0)
+    myerror(ep.getErrorMessage());
+  printf("idata %d\n",idata_r);
+  
+  ep.read((uint32_t)(eeprom_size - 8),fdata_r);
+  if(ep.getError() != 0)
+    myerror(ep.getErrorMessage());
+  printf("fdata %f\n",fdata_r);
+  
+  // Test read and write a structure
+  md.sdata = -15203;
+  md.idata = 45124;
+  md.fdata = -12.27;
+ 
+  ep.write((uint32_t)(eeprom_size - 32),(void *)&md,sizeof(md)); // write a structure eeprom_size - 32
+  if(ep.getError() != 0)
+    myerror(ep.getErrorMessage());
+    
+  printf("\nTest write and read a structure (%d %d %f) :\n",md.sdata,md.idata,md.fdata);
+  
+  ep.read((uint32_t)(eeprom_size - 32),(void *)&md_r,sizeof(md_r));
+  if(ep.getError() != 0)
+    myerror(ep.getErrorMessage());
+  
+  printf("md.sdata %d\n",md_r.sdata);
+  printf("md.idata %d\n",md_r.idata);
+  printf("md.fdata %f\n",md_r.fdata);
+    
+    // Test read and write of an array of the first max_size bytes
+    for(i = 0;i < max_size;i++)
+       data[i] = max_size - i - 1;
+    
+    ep.write((uint32_t)(0),data,(uint32_t)max_size);
+  if(ep.getError() != 0)
+    myerror(ep.getErrorMessage());
+    
+    ep.read((uint32_t)(0),data_r,(uint32_t)max_size);
+  if(ep.getError() != 0)
+    myerror(ep.getErrorMessage());
+    
+    printf("\nTest write and read an array of the first %d bytes :\n",max_size);
+    for(i = 0;i < max_size/16;i++) {
+     for(j = 0;j < 16;j++) {
+        addr = i * 16 + j;
+        printf("%3d ",(uint8_t)data_r[addr]);
+     }
+     printf("\n");
+  }
+    printf("\n");
+  
+  // Test write and read an array of int32
+  s = eeprom_size / 4;                // size of eeprom in int32
+  int ldata_size = sizeof(ldata) / 4; // size of data array in int32
+  l = s / ldata_size;                 // loop index
+  
+  // size of read / write in bytes
+  t = eeprom_size;
+  if(t > ldata_size * 4)
+    t = ldata_size * 4;
+  
+  printf("Test write and read an array of %d int32 (write entire memory) :\n",t/4);
+
+  // Write entire eeprom
+    if(l) {
+    for(k = 0;k < l;k++) {
+       for(i = 0;i < ldata_size;i++)
+          ldata[i] = ldata_size * k + i;
+        
+       addr = k * ldata_size * 4;
+       ep.write(addr,(void *)ldata,t);
+       if(ep.getError() != 0)
+         myerror(ep.getErrorMessage());
+    }  
+    
+      printf("Write OK\n");
+    
+    // Read entire eeprom
+      id = 0;
+    for(k = 0;k < l;k++) {
+       addr = k * ldata_size * 4;
+       ep.read(addr,(void *)ldata,t);
+       if(ep.getError() != 0)
+         myerror(ep.getErrorMessage());
+  
+       // format outputs with 8 words rows
+       for(i = 0;i < ldata_size / 8;i++) {
+                id++;
+          printf("%4d ",id);
+          for(j = 0;j < 8;j++) {
+             addr = i * 8 + j;
+             printf("%5d ",ldata[addr]);
+          }
+          printf("\n");
+       }
+    }
+  }
+    else {
+        for(i = 0;i < s;i++)
+       ldata[i] = i;
+        
+    addr = 0;
+    ep.write(addr,(void *)ldata,t);
+    if(ep.getError() != 0)
+      myerror(ep.getErrorMessage());
+        
+        printf("Write OK\n");
+    
+    // Read entire eeprom
+      id = 0;
+    
+    addr = 0;
+    ep.read(addr,(void *)ldata,t);
+    if(ep.getError() != 0)
+      myerror(ep.getErrorMessage());
+  
+    // format outputs with 8 words rows
+    for(i = 0;i < s / 8;i++) {
+             id++;
+       printf("%4d ",id);
+       for(j = 0;j < 8;j++) {
+          addr = i * 8 + j;
+          printf("%5d ",ldata[addr]);
+       }
+       printf("\n");
+    }
+    }
+  
+  // clear eeprom
+  printf("\nClear eeprom\n");
+
+  ep.clear();
+  if(ep.getError() != 0)
+    myerror(ep.getErrorMessage());
+    
+  printf("End\n");  
+    
+}
+
+int main() 
+{
+
+  eeprom_test();
+    
+  return(0);
+}

diff -r 000000000000 -r 770fea48cb00 mbed.bld
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed.bld	Fri Mar 03 11:36:09 2017 +0000
@@ -0,0 +1,1 @@
+http://mbed.org/users/mbed_official/code/mbed/builds/ad3be0349dc5
\ No newline at end of file