wimbeaumont Project / Mbed 2 deprecated MCP4728setaddrProg

program to set the MCP4728 address for the SOLID amplifier board

Dependencies:   DevInterfaces I2Cinterfaces MCP4728setaddr mbed

main.cpp@0:d97e8b3802b3, 2016-01-12 (annotated)

Committer:
wbeaumont
Date:
Tue Jan 12 14:43:00 2016 +0000
Revision:
0:d97e8b3802b3
Child:
1:7e052cf2f2ee
tested to set the address

Who changed what in which revision?

UserRevisionLine numberNew contents of line
wbeaumont 0:d97e8b3802b3 1 #include "mbed.h"
wbeaumont 0:d97e8b3802b3 2 #include "I2C.h"
wbeaumont 0:d97e8b3802b3 3 #define TARGET TARGET_KL05Z
wbeaumont 0:d97e8b3802b3 4 #if defined (TARGET_KL25Z) || defined (TARGET_KL46Z)
wbeaumont 0:d97e8b3802b3 5 PinName const SDA = PTE25;
wbeaumont 0:d97e8b3802b3 6 PinName const SCL = PTE24;
wbeaumont 0:d97e8b3802b3 7 #elif defined (TARGET_KL05Z)
wbeaumont 0:d97e8b3802b3 8 PinName const SDA = PTB4;
wbeaumont 0:d97e8b3802b3 9 PinName const SCL = PTB3;
wbeaumont 0:d97e8b3802b3 10 #elif defined (TARGET_K20D50M)
wbeaumont 0:d97e8b3802b3 11 PinName const SDA = PTB1;
wbeaumont 0:d97e8b3802b3 12 PinName const SCL = PTB0;
wbeaumont 0:d97e8b3802b3 13 #else
wbeaumont 0:d97e8b3802b3 14 #error TARGET NOT DEFINED
wbeaumont 0:d97e8b3802b3 15 #endif
wbeaumont 0:d97e8b3802b3 16
wbeaumont 0:d97e8b3802b3 17 #define MCP4728_readaddresscmd 0xC
wbeaumont 0:d97e8b3802b3 18 #define MCP4728_baseaddr 0xC0
wbeaumont 0:d97e8b3802b3 19
wbeaumont 0:d97e8b3802b3 20
wbeaumont 0:d97e8b3802b3 21 class I2CInterface {
wbeaumont 0:d97e8b3802b3 22 public :
wbeaumont 0:d97e8b3802b3 23 I2CInterface(){}; //Create an I2C Master interface
wbeaumont 0:d97e8b3802b3 24 virtual void frequency (int hz){};// Set the frequency of the I2C interface.
wbeaumont 0:d97e8b3802b3 25 virtual int read (int address, char *data, int length, bool repeated=false){
wbeaumont 0:d97e8b3802b3 26 return 0;};//Read from an I2C slave.
wbeaumont 0:d97e8b3802b3 27 virtual int read (int ack){return 0;};// Read a single byte from the I2C bus.
wbeaumont 0:d97e8b3802b3 28 virtual int write (int address, const char *data, int length, bool repeated=false){
wbeaumont 0:d97e8b3802b3 29 return 0;
wbeaumont 0:d97e8b3802b3 30 };// Write to an I2C slave.
wbeaumont 0:d97e8b3802b3 31 virtual int write (int data){return 0;};// Write single byte out on the I2C bus.
wbeaumont 0:d97e8b3802b3 32 virtual void start (void){};// Creates a start condition on the I2C bus.
wbeaumont 0:d97e8b3802b3 33 virtual void stop (void){};// Creates a stop condition on the I2C bus.
wbeaumont 0:d97e8b3802b3 34 virtual int transfer (int address, const char *tx_buffer, int tx_length, char *rx_buffer, int rx_length, const event_callback_t &callback, int event=I2C_EVENT_TRANSFER_COMPLETE, bool repeated=false){
wbeaumont 0:d97e8b3802b3 35 return 0;
wbeaumont 0:d97e8b3802b3 36 }; // Start non-blocking I2C transfer.
wbeaumont 0:d97e8b3802b3 37
wbeaumont 0:d97e8b3802b3 38 };
wbeaumont 0:d97e8b3802b3 39
wbeaumont 0:d97e8b3802b3 40 class MBEDI2CInterface :public I2CInterface {
wbeaumont 0:d97e8b3802b3 41
wbeaumont 0:d97e8b3802b3 42 I2C i2cdev;
wbeaumont 0:d97e8b3802b3 43 public :
wbeaumont 0:d97e8b3802b3 44
wbeaumont 0:d97e8b3802b3 45 MBEDI2CInterface(PinName sda, PinName scl): i2cdev(sda,scl){} ;
wbeaumont 0:d97e8b3802b3 46 // next could perhaps more efficient but not yet investigated
wbeaumont 0:d97e8b3802b3 47 virtual void frequency (int hz){return i2cdev.frequency(hz) ;};
wbeaumont 0:d97e8b3802b3 48 virtual int read (int address, char *data, int length, bool repeated=false){
wbeaumont 0:d97e8b3802b3 49 return i2cdev.read ( address, data, length, repeated);};
wbeaumont 0:d97e8b3802b3 50 virtual int read (int ack){return i2cdev.read ( ack);};// Read a single byte from the I2C bus.
wbeaumont 0:d97e8b3802b3 51 virtual int write (int address, const char *data, int length, bool repeated=false){
wbeaumont 0:d97e8b3802b3 52 return i2cdev.write ( address, data, length, repeated);
wbeaumont 0:d97e8b3802b3 53 }
wbeaumont 0:d97e8b3802b3 54 virtual int write (int data){return i2cdev.write (data);};// Write single byte out on the I2C bus.
wbeaumont 0:d97e8b3802b3 55 virtual void start (void){i2cdev.start ();};// Creates a start condition on the I2C bus.
wbeaumont 0:d97e8b3802b3 56 virtual void stop (void){i2cdev.stop();};// Creates a stop condition on the I2C bus.
wbeaumont 0:d97e8b3802b3 57 virtual int transfer (int address, const char *tx_buffer, int tx_length, char *rx_buffer, int rx_length, const event_callback_t &callback, int event=I2C_EVENT_TRANSFER_COMPLETE, bool repeated=false){
wbeaumont 0:d97e8b3802b3 58 return -1; // seems transfer not supported in mbed or not correctly called below
wbeaumont 0:d97e8b3802b3 59 // return i2cdev.transfer (address, tx_buffer, tx_length, rx_buffer, rx_length, callback, event, repeated);
wbeaumont 0:d97e8b3802b3 60 };
wbeaumont 0:d97e8b3802b3 61
wbeaumont 0:d97e8b3802b3 62
wbeaumont 0:d97e8b3802b3 63 } ;
wbeaumont 0:d97e8b3802b3 64
wbeaumont 0:d97e8b3802b3 65
wbeaumont 0:d97e8b3802b3 66 MBEDI2CInterface mbedi2c( SDA, SCL);
wbeaumont 0:d97e8b3802b3 67
wbeaumont 0:d97e8b3802b3 68 MBEDI2CInterface* mbedi2cp= &mbedi2c ;
wbeaumont 0:d97e8b3802b3 69
wbeaumont 0:d97e8b3802b3 70 I2CInterface* i2cdev= mbedi2cp;
wbeaumont 0:d97e8b3802b3 71
wbeaumont 0:d97e8b3802b3 72
wbeaumont 0:d97e8b3802b3 73 DigitalOut LDAC(PTA6);
wbeaumont 0:d97e8b3802b3 74 DigitalOut CntPin(PTA7);
wbeaumont 0:d97e8b3802b3 75
wbeaumont 0:d97e8b3802b3 76
wbeaumont 0:d97e8b3802b3 77 I2CInterface* i2cif;
wbeaumont 0:d97e8b3802b3 78
wbeaumont 0:d97e8b3802b3 79
wbeaumont 0:d97e8b3802b3 80 class MPC4728_address_set{
wbeaumont 0:d97e8b3802b3 81 I2CInterface *i2cd;
wbeaumont 0:d97e8b3802b3 82 DigitalOut *LDAC;
wbeaumont 0:d97e8b3802b3 83 DigitalOut *Cntout;
wbeaumont 0:d97e8b3802b3 84 InterruptIn cntin;
wbeaumont 0:d97e8b3802b3 85 int sclcnt;
wbeaumont 0:d97e8b3802b3 86 unsigned char oldaddress;
wbeaumont 0:d97e8b3802b3 87 void count_down( ){
wbeaumont 0:d97e8b3802b3 88 sclcnt--;
wbeaumont 0:d97e8b3802b3 89 *Cntout=1;
wbeaumont 0:d97e8b3802b3 90 *Cntout=0;
wbeaumont 0:d97e8b3802b3 91 if ( sclcnt==0){
wbeaumont 0:d97e8b3802b3 92 //disable this interrupt
wbeaumont 0:d97e8b3802b3 93 int wait=10; while ( wait--);
wbeaumont 0:d97e8b3802b3 94 *LDAC=0;
wbeaumont 0:d97e8b3802b3 95 }
wbeaumont 0:d97e8b3802b3 96 }
wbeaumont 0:d97e8b3802b3 97
wbeaumont 0:d97e8b3802b3 98 public:
wbeaumont 0:d97e8b3802b3 99 MPC4728_address_set(PinName sclcntpin, DigitalOut *LDACpin, I2CInterface* i2cdevice, DigitalOut *Cntoutpin ): cntin(sclcntpin) {
wbeaumont 0:d97e8b3802b3 100 i2cd=i2cdevice;
wbeaumont 0:d97e8b3802b3 101 LDAC=LDACpin;
wbeaumont 0:d97e8b3802b3 102 Cntout=Cntoutpin;
wbeaumont 0:d97e8b3802b3 103 *Cntoutpin=0;
wbeaumont 0:d97e8b3802b3 104 *LDAC=1;
wbeaumont 0:d97e8b3802b3 105 i2cd->frequency(40000); // interrupt is slow, so set to 40 kHz
wbeaumont 0:d97e8b3802b3 106
wbeaumont 0:d97e8b3802b3 107 }
wbeaumont 0:d97e8b3802b3 108
wbeaumont 0:d97e8b3802b3 109
wbeaumont 0:d97e8b3802b3 110 int getsclcnt( ){return sclcnt;}
wbeaumont 0:d97e8b3802b3 111
wbeaumont 0:d97e8b3802b3 112 int readaddress(char* address, char *eepromaddr=0 , char *regaddr=0 ) {
wbeaumont 0:d97e8b3802b3 113 *LDAC=1;
wbeaumont 0:d97e8b3802b3 114 start_scl_cnt(18);// 1+9+8 faling edges
wbeaumont 0:d97e8b3802b3 115 *address=0x0C; // not allowed value
wbeaumont 0:d97e8b3802b3 116 char cmd = MCP4728_readaddresscmd;
wbeaumont 0:d97e8b3802b3 117 int i2cresult=i2cd->write(0, &cmd, 1,true ); //1 byte don't send stop
wbeaumont 0:d97e8b3802b3 118 if ( i2cresult ) { // <> 0
wbeaumont 0:d97e8b3802b3 119 //i2cd->abort_transfer ( );
wbeaumont 0:d97e8b3802b3 120 i2cd->stop();
wbeaumont 0:d97e8b3802b3 121 *address=0xFF;
wbeaumont 0:d97e8b3802b3 122 return i2cresult ;
wbeaumont 0:d97e8b3802b3 123 }
wbeaumont 0:d97e8b3802b3 124 i2cresult=i2cd->read(MCP4728_baseaddr, &cmd, 1,false );
wbeaumont 0:d97e8b3802b3 125 if ( i2cresult) *address=0xFE;
wbeaumont 0:d97e8b3802b3 126 else {
wbeaumont 0:d97e8b3802b3 127 *address=cmd;
wbeaumont 0:d97e8b3802b3 128 *regaddr= cmd >>1;
wbeaumont 0:d97e8b3802b3 129 *regaddr= *regaddr& 0x7;
wbeaumont 0:d97e8b3802b3 130 *eepromaddr = cmd>>5;
wbeaumont 0:d97e8b3802b3 131 *eepromaddr = *eepromaddr & 0x7 ;
wbeaumont 0:d97e8b3802b3 132 }
wbeaumont 0:d97e8b3802b3 133 *LDAC=1;
wbeaumont 0:d97e8b3802b3 134 return i2cresult ;
wbeaumont 0:d97e8b3802b3 135 }
wbeaumont 0:d97e8b3802b3 136
wbeaumont 0:d97e8b3802b3 137
wbeaumont 0:d97e8b3802b3 138 int setaddress(char currentaddress, char newaddress ){ // both address
wbeaumont 0:d97e8b3802b3 139 *LDAC=1;
wbeaumont 0:d97e8b3802b3 140 char oldaddr=0x7 & currentaddress;oldaddr=oldaddr<<1;
wbeaumont 0:d97e8b3802b3 141 char newaddr=0x7 & newaddress;
wbeaumont 0:d97e8b3802b3 142 newaddr= newaddr<<2;
wbeaumont 0:d97e8b3802b3 143 char address=MCP4728_baseaddr | oldaddr;oldaddr=oldaddr<<1;
wbeaumont 0:d97e8b3802b3 144 const char cmdtype= 0x60; // 0x011000000 0x011AAA0
wbeaumont 0:d97e8b3802b3 145 char data[3] ;
wbeaumont 0:d97e8b3802b3 146 data[0]= cmdtype | oldaddr | 1; //0x011OOO01
wbeaumont 0:d97e8b3802b3 147 data[1]= cmdtype | newaddr | 2; //0x011NNN10
wbeaumont 0:d97e8b3802b3 148 data[2]= cmdtype | newaddr | 3; //0x011NNN11
wbeaumont 0:d97e8b3802b3 149 printf( "cmd %x %x data %x %x %x \n\r", newaddress, newaddr,(int)data[0],(int)data[1],(int)data[2]);
wbeaumont 0:d97e8b3802b3 150 start_scl_cnt(18);//1+ 9+8 faling edges
wbeaumont 0:d97e8b3802b3 151 int i2cresult=i2cd->write(address, data, 3,false ); //3 bytes sent and stop
wbeaumont 0:d97e8b3802b3 152 *LDAC=1;
wbeaumont 0:d97e8b3802b3 153 return i2cresult ;
wbeaumont 0:d97e8b3802b3 154 }
wbeaumont 0:d97e8b3802b3 155
wbeaumont 0:d97e8b3802b3 156 void start_scl_cnt(int cnts) {
wbeaumont 0:d97e8b3802b3 157 sclcnt= cnts;
wbeaumont 0:d97e8b3802b3 158 cntin.fall(this, &MPC4728_address_set::count_down);
wbeaumont 0:d97e8b3802b3 159 }
wbeaumont 0:d97e8b3802b3 160
wbeaumont 0:d97e8b3802b3 161 };//endclass
wbeaumont 0:d97e8b3802b3 162
wbeaumont 0:d97e8b3802b3 163 int main(void){
wbeaumont 0:d97e8b3802b3 164 printf("\n\rMCP4728 set address program date : %s time :%s\n\r",__DATE__,__TIME__);
wbeaumont 0:d97e8b3802b3 165
wbeaumont 0:d97e8b3802b3 166 LDAC=1;
wbeaumont 0:d97e8b3802b3 167 char oldaddr, eeaddr, regaddr, newaddr= 2;
wbeaumont 0:d97e8b3802b3 168 int newaddrint;
wbeaumont 0:d97e8b3802b3 169 MPC4728_address_set mpc4728(PTB0,&LDAC,i2cdev, &CntPin);
wbeaumont 0:d97e8b3802b3 170 int i2cresult =mpc4728.readaddress(&oldaddr, &eeaddr, &regaddr);
wbeaumont 0:d97e8b3802b3 171 if ( i2cresult ) {
wbeaumont 0:d97e8b3802b3 172 printf("failed to read current address error code: %d , scl cnt = %d \n", i2cresult,mpc4728.getsclcnt() );
wbeaumont 0:d97e8b3802b3 173 }
wbeaumont 0:d97e8b3802b3 174 else {
wbeaumont 0:d97e8b3802b3 175 printf( " current address = %d ,eeaddr %d , regaddr %d sclcnt= %d give new address : ", (int) oldaddr,(int) eeaddr, (int)regaddr, mpc4728.getsclcnt());
wbeaumont 0:d97e8b3802b3 176 scanf( "%d",&newaddrint);
wbeaumont 0:d97e8b3802b3 177 printf("\n\r");
wbeaumont 0:d97e8b3802b3 178 if ( newaddrint >= 0 && newaddrint <= 8 ) {
wbeaumont 0:d97e8b3802b3 179 newaddr= (char) newaddrint;
wbeaumont 0:d97e8b3802b3 180 i2cresult=mpc4728.setaddress(oldaddr,newaddr);
wbeaumont 0:d97e8b3802b3 181 if ( i2cresult ) printf("failed to set address to %d error : %d , sclcnt= %d \n",newaddr, i2cresult,mpc4728.getsclcnt());
wbeaumont 0:d97e8b3802b3 182 else {
wbeaumont 0:d97e8b3802b3 183 printf("set new address \n");
wbeaumont 0:d97e8b3802b3 184 i2cresult =mpc4728.readaddress(&oldaddr, &eeaddr, &regaddr);
wbeaumont 0:d97e8b3802b3 185 if ( i2cresult ) printf("failed to read (new) address error : %d \n", i2cresult);
wbeaumont 0:d97e8b3802b3 186 else printf( "new address = %d ,eeaddr %d , regaddr %d sclcnt= %d \n\r", (int) oldaddr,(int) eeaddr, (int)regaddr, mpc4728.getsclcnt()); printf( " new address = %d \n", (int) oldaddr);
wbeaumont 0:d97e8b3802b3 187 }
wbeaumont 0:d97e8b3802b3 188 }
wbeaumont 0:d97e8b3802b3 189 else {
wbeaumont 0:d97e8b3802b3 190 printf( " new address %d is not valid reset the up to restart the program \n", (int)newaddr );
wbeaumont 0:d97e8b3802b3 191 }
wbeaumont 0:d97e8b3802b3 192 }
wbeaumont 0:d97e8b3802b3 193 printf("restart !!!! \n\r");
wbeaumont 0:d97e8b3802b3 194 while (1);
wbeaumont 0:d97e8b3802b3 195 //return 0; // never reach this
wbeaumont 0:d97e8b3802b3 196 };
wbeaumont 0:d97e8b3802b3 197