MSS / Mbed 2 deprecated testI2C

Simple I2C test program. open/close/read/write supported.

Dependencies:   mbed vt100

main.cpp@2:218e22a54982, 2016-04-05 (annotated)

Committer:
Rhyme
Date:
Tue Apr 05 06:53:27 2016 +0000
Revision:
2:218e22a54982
Parent:
1:e105ceaee6ac 
condition check for read/write and bus scan added;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Rhyme 0:1a2637f8e2dd 1 #include "mbed.h"
Rhyme 0:1a2637f8e2dd 2 #include <string.h>
Rhyme 0:1a2637f8e2dd 3 #include <ctype.h>
Rhyme 0:1a2637f8e2dd 4 #include "vt100.h"
Rhyme 0:1a2637f8e2dd 5 #include "MSS.h"
Rhyme 0:1a2637f8e2dd 6 #include "dumb_i2c.h"
Rhyme 0:1a2637f8e2dd 7
Rhyme 0:1a2637f8e2dd 8 DUMB_I2C *i2c = 0 ;
Rhyme 0:1a2637f8e2dd 9 vt100 *tty = 0 ;
Rhyme 0:1a2637f8e2dd 10
Rhyme 0:1a2637f8e2dd 11 void doClose(void)
Rhyme 0:1a2637f8e2dd 12 {
Rhyme 0:1a2637f8e2dd 13 if (i2c != 0) {
Rhyme 0:1a2637f8e2dd 14 printf("Closing I2C at 0x%02X ... ", i2c->address()) ;
Rhyme 0:1a2637f8e2dd 15 delete i2c ;
Rhyme 0:1a2637f8e2dd 16 i2c = 0 ;
Rhyme 0:1a2637f8e2dd 17 printf("Done\n") ;
Rhyme 0:1a2637f8e2dd 18 }
Rhyme 0:1a2637f8e2dd 19 }
Rhyme 0:1a2637f8e2dd 20
Rhyme 0:1a2637f8e2dd 21 void doOpen(void)
Rhyme 0:1a2637f8e2dd 22 {
Rhyme 0:1a2637f8e2dd 23 uint8_t address ;
Rhyme 0:1a2637f8e2dd 24 scanf("%X", &address) ;
Rhyme 0:1a2637f8e2dd 25 if (i2c != 0) {
Rhyme 0:1a2637f8e2dd 26 doClose() ;
Rhyme 0:1a2637f8e2dd 27 }
Rhyme 0:1a2637f8e2dd 28 printf("Opening I2C at 0x%02X ... ", address) ;
Rhyme 0:1a2637f8e2dd 29 i2c = new DUMB_I2C(PIN_SDA, PIN_SCL, address) ;
Rhyme 0:1a2637f8e2dd 30 printf("Done\n") ;
Rhyme 0:1a2637f8e2dd 31 }
Rhyme 0:1a2637f8e2dd 32
Rhyme 0:1a2637f8e2dd 33 void doRead(void)
Rhyme 0:1a2637f8e2dd 34 {
Rhyme 0:1a2637f8e2dd 35 int addr ;
Rhyme 0:1a2637f8e2dd 36 int len ;
Rhyme 0:1a2637f8e2dd 37 uint8_t *data ;
Rhyme 2:218e22a54982 38 int result ;
Rhyme 1:e105ceaee6ac 39 if (i2c == 0) {
Rhyme 1:e105ceaee6ac 40 printf("I2C is not opened\n") ;
Rhyme 1:e105ceaee6ac 41 return ;
Rhyme 1:e105ceaee6ac 42 }
Rhyme 0:1a2637f8e2dd 43 scanf("%X %X", &addr, &len) ;
Rhyme 0:1a2637f8e2dd 44 if (len > 0) {
Rhyme 0:1a2637f8e2dd 45 data = new uint8_t[len] ;
Rhyme 0:1a2637f8e2dd 46 }
Rhyme 0:1a2637f8e2dd 47 // i2c->read(addr, data, len) ;
Rhyme 0:1a2637f8e2dd 48 printf("0x%02X : ", (unsigned int)addr) ;
Rhyme 0:1a2637f8e2dd 49 for (int i = 0 ; i < len ; i++ ) {
Rhyme 2:218e22a54982 50 result = i2c->read(addr+i, &data[i], 1) ;
Rhyme 2:218e22a54982 51 if (result == 0) {
Rhyme 2:218e22a54982 52 printf("%02X ", data[i]) ;
Rhyme 2:218e22a54982 53 if (((i+1) < len)&&(((i+1)%0x10) == 0)) {
Rhyme 2:218e22a54982 54 printf("\n") ;
Rhyme 2:218e22a54982 55 printf("0x%02X : ", (unsigned int)(addr + i + 1)) ;
Rhyme 2:218e22a54982 56 }
Rhyme 2:218e22a54982 57 } else {
Rhyme 2:218e22a54982 58 printf("failed to read 0x%02X\n", addr+i) ;
Rhyme 2:218e22a54982 59 }
Rhyme 0:1a2637f8e2dd 60 }
Rhyme 0:1a2637f8e2dd 61 printf("\n") ;
Rhyme 0:1a2637f8e2dd 62 }
Rhyme 0:1a2637f8e2dd 63
Rhyme 0:1a2637f8e2dd 64 void doWrite(void)
Rhyme 0:1a2637f8e2dd 65 {
Rhyme 0:1a2637f8e2dd 66 int addr ;
Rhyme 0:1a2637f8e2dd 67 uint8_t len ;
Rhyme 1:e105ceaee6ac 68 uint8_t data ;
Rhyme 2:218e22a54982 69 int ack ;
Rhyme 2:218e22a54982 70 if (i2c == 0) {
Rhyme 1:e105ceaee6ac 71 printf("I2C is not opened\n") ;
Rhyme 1:e105ceaee6ac 72 return ;
Rhyme 1:e105ceaee6ac 73 }
Rhyme 1:e105ceaee6ac 74 scanf("%X %X", &addr, &data) ;
Rhyme 2:218e22a54982 75 ack = i2c->write(addr, &data, 1) ;
Rhyme 2:218e22a54982 76 if (ack != 0) {
Rhyme 2:218e22a54982 77 printf("NAK at writing data[0x%02X] to address[0x%02X]\n",
Rhyme 2:218e22a54982 78 data, addr ) ;
Rhyme 2:218e22a54982 79 }
Rhyme 0:1a2637f8e2dd 80 }
Rhyme 0:1a2637f8e2dd 81
Rhyme 0:1a2637f8e2dd 82 void doStatus(void)
Rhyme 0:1a2637f8e2dd 83 {
Rhyme 0:1a2637f8e2dd 84 if (i2c == 0) {
Rhyme 0:1a2637f8e2dd 85 printf("i2c is not opened\n") ;
Rhyme 0:1a2637f8e2dd 86 } else {
Rhyme 1:e105ceaee6ac 87 printf("i2c device at 0x%02X is opened at %d Hz\n",
Rhyme 1:e105ceaee6ac 88 i2c->address(), i2c->frequency()) ;
Rhyme 0:1a2637f8e2dd 89 }
Rhyme 0:1a2637f8e2dd 90 }
Rhyme 0:1a2637f8e2dd 91
Rhyme 0:1a2637f8e2dd 92 void doHelp(void)
Rhyme 0:1a2637f8e2dd 93 {
Rhyme 0:1a2637f8e2dd 94 printf("Simple I2C test program %s for %s\n", __DATE__, BOARD_NAME) ;
Rhyme 0:1a2637f8e2dd 95 printf("\n === usage ===\n") ;
Rhyme 0:1a2637f8e2dd 96 printf("open <7bit addr> : open i2c device at <7bit addr>\n") ;
Rhyme 0:1a2637f8e2dd 97 printf("close : close currently opened i2c\n") ;
Rhyme 0:1a2637f8e2dd 98 printf("read <addr> <len> : read <len> data from <addr>\n") ;
Rhyme 0:1a2637f8e2dd 99 printf("write <addr> <data> : write <data> to register <addr>\n") ;
Rhyme 1:e105ceaee6ac 100 printf("frequency <freq> : change frequency to <freq> Hz\n") ;
Rhyme 2:218e22a54982 101 printf("bus : bus scan for existing I2C addresses\n") ;
Rhyme 0:1a2637f8e2dd 102 printf("status : print current status\n") ;
Rhyme 0:1a2637f8e2dd 103 printf("help : print this help\n") ;
Rhyme 0:1a2637f8e2dd 104 printf("\nPlease set local-echo to see what you are typing.\n") ;
Rhyme 0:1a2637f8e2dd 105 printf("\n") ;
Rhyme 0:1a2637f8e2dd 106 }
Rhyme 0:1a2637f8e2dd 107
Rhyme 1:e105ceaee6ac 108 void doFreq(void)
Rhyme 1:e105ceaee6ac 109 {
Rhyme 1:e105ceaee6ac 110 int freq = 0 ;
Rhyme 1:e105ceaee6ac 111 scanf("%d", &freq) ;
Rhyme 1:e105ceaee6ac 112 if (i2c != 0) {
Rhyme 1:e105ceaee6ac 113 i2c->frequency(freq) ;
Rhyme 1:e105ceaee6ac 114 }
Rhyme 1:e105ceaee6ac 115 }
Rhyme 1:e105ceaee6ac 116
Rhyme 2:218e22a54982 117 void doBusScan(void)
Rhyme 2:218e22a54982 118 {
Rhyme 2:218e22a54982 119 int address ;
Rhyme 2:218e22a54982 120 uint8_t data ;
Rhyme 2:218e22a54982 121 int result ;
Rhyme 2:218e22a54982 122 if (i2c != 0) {
Rhyme 2:218e22a54982 123 printf("Closing I2C at 0x%02X ... ", i2c->address()) ;
Rhyme 2:218e22a54982 124 delete i2c ;
Rhyme 2:218e22a54982 125 i2c = 0 ;
Rhyme 2:218e22a54982 126 printf("Done\n") ;
Rhyme 2:218e22a54982 127 }
Rhyme 2:218e22a54982 128
Rhyme 2:218e22a54982 129 for (address = 1; address < 127 ; address++) {
Rhyme 2:218e22a54982 130 i2c = new DUMB_I2C(PIN_SDA, PIN_SCL, address) ;
Rhyme 2:218e22a54982 131 result = i2c->read(address, &data, 1) ;
Rhyme 2:218e22a54982 132 if (result == 0) {
Rhyme 2:218e22a54982 133 printf("%02X ", address) ;
Rhyme 2:218e22a54982 134 }
Rhyme 2:218e22a54982 135 delete i2c ;
Rhyme 2:218e22a54982 136 i2c = 0 ;
Rhyme 2:218e22a54982 137 }
Rhyme 2:218e22a54982 138 printf("\n") ;
Rhyme 2:218e22a54982 139 }
Rhyme 2:218e22a54982 140
Rhyme 0:1a2637f8e2dd 141 void doCommand(char *str)
Rhyme 0:1a2637f8e2dd 142 {
Rhyme 0:1a2637f8e2dd 143 switch(*str) {
Rhyme 0:1a2637f8e2dd 144 case 'o': case 'O': /* open */
Rhyme 2:218e22a54982 145 doOpen() ; break ;
Rhyme 0:1a2637f8e2dd 146 case 'c': case 'C': /* close */
Rhyme 2:218e22a54982 147 doClose() ; break ;
Rhyme 0:1a2637f8e2dd 148 case 'r': case 'R': /* read */
Rhyme 2:218e22a54982 149 doRead() ; break ;
Rhyme 0:1a2637f8e2dd 150 case 'w': case 'W': /* write */
Rhyme 2:218e22a54982 151 doWrite() ; break ;
Rhyme 0:1a2637f8e2dd 152 case 's': case 'S': /* status */
Rhyme 2:218e22a54982 153 doStatus() ; break ;
Rhyme 1:e105ceaee6ac 154 case 'f': case 'F': /* Frequency */
Rhyme 2:218e22a54982 155 doFreq() ; break ;
Rhyme 2:218e22a54982 156 case 'b': case 'B': /* Bus Scan */
Rhyme 2:218e22a54982 157 doBusScan() ; break ;
Rhyme 0:1a2637f8e2dd 158 default:
Rhyme 0:1a2637f8e2dd 159 doHelp() ; break ;
Rhyme 0:1a2637f8e2dd 160 }
Rhyme 0:1a2637f8e2dd 161 }
Rhyme 0:1a2637f8e2dd 162
Rhyme 0:1a2637f8e2dd 163 int main() {
Rhyme 0:1a2637f8e2dd 164 char cmd[32] ;
Rhyme 0:1a2637f8e2dd 165 tty = new vt100() ;
Rhyme 0:1a2637f8e2dd 166 tty->cls() ;
Rhyme 0:1a2637f8e2dd 167 doHelp() ;
Rhyme 0:1a2637f8e2dd 168 while(1) {
Rhyme 0:1a2637f8e2dd 169 printf("> ") ;
Rhyme 0:1a2637f8e2dd 170 scanf("%s", cmd) ;
Rhyme 0:1a2637f8e2dd 171 doCommand(cmd) ;
Rhyme 0:1a2637f8e2dd 172 }
Rhyme 0:1a2637f8e2dd 173 }