feng wang / Mbed OS ACTest_ForHank

test

Dependencies:   mbed-STM32F103C8T6 SHT21_ncleee

eeprom.cpp@1:0fe432e5dfc4, 2020-04-15 (annotated)

Committer:
bbw
Date:
Wed Apr 15 11:36:03 2020 +0000
Revision:
1:0fe432e5dfc4
Test_bob_0415

Who changed what in which revision?

UserRevisionLine numberNew contents of line
bbw 1:0fe432e5dfc4 1 #include "eeprom.h"
bbw 1:0fe432e5dfc4 2 #include "main.h"
bbw 1:0fe432e5dfc4 3
bbw 1:0fe432e5dfc4 4 void readID(int addy){
bbw 1:0fe432e5dfc4 5 char ucdata_write[1];
bbw 1:0fe432e5dfc4 6 char ucdata_read[1];
bbw 1:0fe432e5dfc4 7 ucdata_write[0] = addy; //MCP24AA02_DID, Address here for Device ID
bbw 1:0fe432e5dfc4 8 while (i2c.write((MCP24AA02_ADDR|WRITE), ucdata_write, 1, 0)){;}//Wait for ACK if EEPROM is in 'write' cycle
bbw 1:0fe432e5dfc4 9 i2c.read((MCP24AA02_ADDR|READ),ucdata_read,1,0);
bbw 1:0fe432e5dfc4 10 if(ucdata_read[0]==0x29){
bbw 1:0fe432e5dfc4 11 debug_uart.printf("Code=%#x (Microchip Technology ltd.(c))\r\n",ucdata_read[0]);
bbw 1:0fe432e5dfc4 12 }
bbw 1:0fe432e5dfc4 13 if(ucdata_read[0]==0x41){
bbw 1:0fe432e5dfc4 14 debug_uart.printf("Code=%#x (2K EEPROM Using i2c)\r\n",ucdata_read[0]);
bbw 1:0fe432e5dfc4 15 }else{
bbw 1:0fe432e5dfc4 16 debug_uart.printf("Unknown eeprom device %x\r\n", ucdata_read[0]);
bbw 1:0fe432e5dfc4 17 }
bbw 1:0fe432e5dfc4 18 }
bbw 1:0fe432e5dfc4 19
bbw 1:0fe432e5dfc4 20 void readEE(int addy){
bbw 1:0fe432e5dfc4 21 char ucdata_write[1];
bbw 1:0fe432e5dfc4 22 char ucdata_read[1];
bbw 1:0fe432e5dfc4 23 ucdata_write[0] = addy; //Address here to read
bbw 1:0fe432e5dfc4 24 while (i2c.write((MCP24AA02_ADDR|WRITE), ucdata_write, 1, 0)){} //Wait for ACK if EEPROM is in 'write' cycle
bbw 1:0fe432e5dfc4 25 i2c.read((MCP24AA02_ADDR|READ),ucdata_read,1,0); //Note 'OR' Address with Read bit
bbw 1:0fe432e5dfc4 26 debug_uart.printf("%c",ucdata_read[0]);
bbw 1:0fe432e5dfc4 27 }
bbw 1:0fe432e5dfc4 28
bbw 1:0fe432e5dfc4 29 void writeEE(int addy,int data){
bbw 1:0fe432e5dfc4 30 char ucdata_write[2];
bbw 1:0fe432e5dfc4 31 ucdata_write[0] = addy;
bbw 1:0fe432e5dfc4 32 ucdata_write[1] = data;
bbw 1:0fe432e5dfc4 33 while (i2c.write((MCP24AA02_ADDR|WRITE), ucdata_write, 1, 0)){} //Wait for ACK if EEPROM is in 'write' cycle
bbw 1:0fe432e5dfc4 34 i2c.write((MCP24AA02_ADDR|WRITE),ucdata_write,2,0); //Note 'OR' Adress with Write bit
bbw 1:0fe432e5dfc4 35 debug_uart.printf("%04d %c\t",addy,data);
bbw 1:0fe432e5dfc4 36 }
bbw 1:0fe432e5dfc4 37
bbw 1:0fe432e5dfc4 38 void eraseEE(void){
bbw 1:0fe432e5dfc4 39 for (int i=0;i<0xFA;i++){ //0xFA to 0xFF are read only with Manufacture/Hardware ID and a Unique Serial Number
bbw 1:0fe432e5dfc4 40 writeEE(i,0xFF);
bbw 1:0fe432e5dfc4 41 }
bbw 1:0fe432e5dfc4 42 }