Diff: eeprom.cpp

Revision:

1:0fe432e5dfc4

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/eeprom.cpp	Wed Apr 15 11:36:03 2020 +0000
@@ -0,0 +1,42 @@
+#include "eeprom.h"
+#include "main.h"
+
+void readID(int addy){
+  char ucdata_write[1];
+  char ucdata_read[1];
+  ucdata_write[0] = addy; //MCP24AA02_DID, Address here for Device ID
+  while (i2c.write((MCP24AA02_ADDR|WRITE), ucdata_write, 1, 0)){;}//Wait for ACK if EEPROM is in 'write' cycle
+  i2c.read((MCP24AA02_ADDR|READ),ucdata_read,1,0);
+  if(ucdata_read[0]==0x29){
+    debug_uart.printf("Code=%#x (Microchip Technology ltd.(c))\r\n",ucdata_read[0]);
+  }
+  if(ucdata_read[0]==0x41){
+    debug_uart.printf("Code=%#x (2K EEPROM Using i2c)\r\n",ucdata_read[0]);
+  }else{
+    debug_uart.printf("Unknown eeprom device %x\r\n", ucdata_read[0]);
+  }   
+}
+
+void readEE(int addy){
+  char ucdata_write[1];
+  char ucdata_read[1];
+  ucdata_write[0] = addy; //Address here to read
+  while (i2c.write((MCP24AA02_ADDR|WRITE), ucdata_write, 1, 0)){} //Wait for ACK if EEPROM is in 'write' cycle
+  i2c.read((MCP24AA02_ADDR|READ),ucdata_read,1,0); //Note 'OR' Address with Read bit
+  debug_uart.printf("%c",ucdata_read[0]);
+}
+
+void writeEE(int addy,int data){
+  char ucdata_write[2];
+  ucdata_write[0] = addy;
+  ucdata_write[1] = data;
+  while (i2c.write((MCP24AA02_ADDR|WRITE), ucdata_write, 1, 0)){} //Wait for ACK if EEPROM is in 'write' cycle
+  i2c.write((MCP24AA02_ADDR|WRITE),ucdata_write,2,0); //Note 'OR' Adress with Write bit
+  debug_uart.printf("%04d %c\t",addy,data);
+}
+
+void eraseEE(void){
+  for (int i=0;i<0xFA;i++){ //0xFA to 0xFF are read only with Manufacture/Hardware ID and a Unique Serial Number
+    writeEE(i,0xFF);
+  }
+}
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