Canberk Sönmez / Mbed 2 deprecated LTC2945_Monitor

LTC2945 ported

Dependencies:   mbed

LT_I2C.cpp@3:2ab78e7e8518, 2017-08-25 (annotated)

Committer:
odtulumbedder
Date:
Fri Aug 25 14:42:14 2017 +0000
Revision:
3:2ab78e7e8518
Parent:
2:7e390bcce297
Child:
4:d32eaca53504
I added a few comments, and cleaned up the code.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
odtulumbedder 0:6be57f391716 1 #include "LT_I2C.h"
odtulumbedder 0:6be57f391716 2
odtulumbedder 0:6be57f391716 3 /* mbed headers */
odtulumbedder 0:6be57f391716 4 #include <mbed.h>
odtulumbedder 0:6be57f391716 5 #include <I2C.h>
odtulumbedder 0:6be57f391716 6
odtulumbedder 2:7e390bcce297 7 I2C *i2c_object = NULL;
odtulumbedder 1:6d4265aa4184 8
odtulumbedder 0:6be57f391716 9 extern "C" {
odtulumbedder 0:6be57f391716 10
odtulumbedder 0:6be57f391716 11 int lt_i2c_init(int sda, int scl) {
odtulumbedder 0:6be57f391716 12 if (i2c_object == NULL) {
odtulumbedder 0:6be57f391716 13 i2c_object = new I2C((PinName) sda, (PinName) scl);
odtulumbedder 0:6be57f391716 14 return LT_I2C_INIT_FINE;
odtulumbedder 0:6be57f391716 15 }
odtulumbedder 0:6be57f391716 16 else {
odtulumbedder 0:6be57f391716 17 return LT_I2C_INIT_QUIT_FIRST;
odtulumbedder 0:6be57f391716 18 }
odtulumbedder 0:6be57f391716 19 }
odtulumbedder 0:6be57f391716 20
odtulumbedder 0:6be57f391716 21 int lt_i2c_quit() {
odtulumbedder 0:6be57f391716 22 delete i2c_object;
odtulumbedder 0:6be57f391716 23 return LT_I2C_SUCCESS;
odtulumbedder 0:6be57f391716 24 }
odtulumbedder 0:6be57f391716 25
odtulumbedder 0:6be57f391716 26 int lt_i2c_init_attach(void *p_i2c_object) {
odtulumbedder 0:6be57f391716 27 if (i2c_object == NULL) {
odtulumbedder 0:6be57f391716 28 i2c_object = (I2C *) p_i2c_object;
odtulumbedder 0:6be57f391716 29 return LT_I2C_INIT_FINE;
odtulumbedder 0:6be57f391716 30 }
odtulumbedder 0:6be57f391716 31 else {
odtulumbedder 0:6be57f391716 32 return LT_I2C_INIT_QUIT_FIRST;
odtulumbedder 0:6be57f391716 33 }
odtulumbedder 0:6be57f391716 34 }
odtulumbedder 0:6be57f391716 35
odtulumbedder 0:6be57f391716 36 void *lt_i2c_get_i2c_object() {
odtulumbedder 0:6be57f391716 37 return i2c_object;
odtulumbedder 0:6be57f391716 38 }
odtulumbedder 0:6be57f391716 39
odtulumbedder 0:6be57f391716 40 int lt_i2c_start() {
odtulumbedder 0:6be57f391716 41 i2c_object->start();
odtulumbedder 0:6be57f391716 42 return LT_I2C_SUCCESS;
odtulumbedder 0:6be57f391716 43 }
odtulumbedder 0:6be57f391716 44
odtulumbedder 0:6be57f391716 45 int lt_i2c_stop() {
odtulumbedder 0:6be57f391716 46 i2c_object->stop();
odtulumbedder 0:6be57f391716 47 return LT_I2C_SUCCESS;
odtulumbedder 0:6be57f391716 48 }
odtulumbedder 0:6be57f391716 49
odtulumbedder 0:6be57f391716 50 uint8_t lt_i2c_write(uint8_t data) {
odtulumbedder 2:7e390bcce297 51 return 1-i2c_object->write(data);
odtulumbedder 0:6be57f391716 52 }
odtulumbedder 0:6be57f391716 53
odtulumbedder 0:6be57f391716 54 uint8_t lt_i2c_read(int8_t ack) {
odtulumbedder 0:6be57f391716 55 return (uint8_t) (i2c_object->read(1-ack)); // act is different in mbed
odtulumbedder 0:6be57f391716 56 }
odtulumbedder 0:6be57f391716 57
odtulumbedder 0:6be57f391716 58 int8_t lt_i2c_write_byte_data(
odtulumbedder 0:6be57f391716 59 uint8_t address,
odtulumbedder 0:6be57f391716 60 uint8_t command,
odtulumbedder 0:6be57f391716 61 uint8_t value) {
odtulumbedder 0:6be57f391716 62 int8_t ret = 0;
odtulumbedder 0:6be57f391716 63 if (lt_i2c_start()!=0) //I2C START
odtulumbedder 1:6d4265aa4184 64 {
odtulumbedder 0:6be57f391716 65 return(1); //Stop and return 0 if START fail
odtulumbedder 1:6d4265aa4184 66 }
odtulumbedder 0:6be57f391716 67 ret |= lt_i2c_write((address<<1)|LT_I2C_WRITE_BIT);
odtulumbedder 0:6be57f391716 68 // Write 7 bit address with W bit
odtulumbedder 0:6be57f391716 69 ret|= lt_i2c_write(command); // Set register to be read to command
odtulumbedder 0:6be57f391716 70 ret|= lt_i2c_write(value);
odtulumbedder 0:6be57f391716 71 lt_i2c_stop(); // I2C STOP
odtulumbedder 0:6be57f391716 72 if (ret!=0) //If there was a NAK return 1
odtulumbedder 1:6d4265aa4184 73 {
odtulumbedder 0:6be57f391716 74 return(1);
odtulumbedder 1:6d4265aa4184 75 }
odtulumbedder 0:6be57f391716 76 return(0); // Return success
odtulumbedder 0:6be57f391716 77 }
odtulumbedder 0:6be57f391716 78
odtulumbedder 0:6be57f391716 79 int8_t lt_i2c_write_word_data(
odtulumbedder 0:6be57f391716 80 uint8_t address,
odtulumbedder 0:6be57f391716 81 uint8_t command,
odtulumbedder 0:6be57f391716 82 uint16_t value) {
odtulumbedder 0:6be57f391716 83 int8_t ret=0;
odtulumbedder 0:6be57f391716 84 union
odtulumbedder 0:6be57f391716 85 {
odtulumbedder 0:6be57f391716 86 uint8_t b[2];
odtulumbedder 0:6be57f391716 87 uint16_t w;
odtulumbedder 0:6be57f391716 88 } data;
odtulumbedder 0:6be57f391716 89 data.w = value;
odtulumbedder 0:6be57f391716 90 if (lt_i2c_start()!=0) //I2C START
odtulumbedder 1:6d4265aa4184 91 {
odtulumbedder 0:6be57f391716 92 return(1); //Stop and return 0 if START fail
odtulumbedder 1:6d4265aa4184 93 }
odtulumbedder 0:6be57f391716 94 ret |= lt_i2c_write((address<<1)|LT_I2C_WRITE_BIT);
odtulumbedder 0:6be57f391716 95 // Write 7 bit address with W bit
odtulumbedder 0:6be57f391716 96 ret|= lt_i2c_write(command); // Set register to be read to command
odtulumbedder 0:6be57f391716 97 ret|= lt_i2c_write(data.b[1]); //Write MSB
odtulumbedder 0:6be57f391716 98 ret|= lt_i2c_write(data.b[0]); //Write LSB;
odtulumbedder 0:6be57f391716 99 lt_i2c_stop(); // I2C STOP
odtulumbedder 0:6be57f391716 100 if (ret!=0) //If there was a NAK return 1
odtulumbedder 1:6d4265aa4184 101 {
odtulumbedder 2:7e390bcce297 102 return(1);
odtulumbedder 1:6d4265aa4184 103 }
odtulumbedder 0:6be57f391716 104 return(0);
odtulumbedder 0:6be57f391716 105 }
odtulumbedder 0:6be57f391716 106
odtulumbedder 0:6be57f391716 107 uint8_t lt_i2c_write_block_data(
odtulumbedder 0:6be57f391716 108 uint8_t address,
odtulumbedder 0:6be57f391716 109 uint8_t command,
odtulumbedder 0:6be57f391716 110 uint8_t length,
odtulumbedder 0:6be57f391716 111 uint8_t *values) {
odtulumbedder 0:6be57f391716 112 int8_t i = length-1;
odtulumbedder 0:6be57f391716 113 int8_t ret = 0;
odtulumbedder 0:6be57f391716 114 if (lt_i2c_start()!=0) //I2C START
odtulumbedder 0:6be57f391716 115 return(1); //Stop and return 0 if START fail
odtulumbedder 0:6be57f391716 116 ret |= lt_i2c_write((address<<1)|LT_I2C_WRITE_BIT);
odtulumbedder 0:6be57f391716 117 // Write 7 bit address with W bit
odtulumbedder 0:6be57f391716 118 ret|= lt_i2c_write(command); // Set register to be read to command
odtulumbedder 0:6be57f391716 119 while (i>=0)
odtulumbedder 0:6be57f391716 120 {
odtulumbedder 0:6be57f391716 121 ret|= lt_i2c_write(values[i]); //Write Value
odtulumbedder 0:6be57f391716 122 i--;
odtulumbedder 0:6be57f391716 123 }
odtulumbedder 0:6be57f391716 124 lt_i2c_stop(); // I2C STOP
odtulumbedder 0:6be57f391716 125 if (ret!=0)
odtulumbedder 1:6d4265aa4184 126 {
odtulumbedder 0:6be57f391716 127 return(1);
odtulumbedder 1:6d4265aa4184 128 }
odtulumbedder 0:6be57f391716 129 else
odtulumbedder 1:6d4265aa4184 130 {
odtulumbedder 0:6be57f391716 131 return(0); // Success!
odtulumbedder 1:6d4265aa4184 132 }
odtulumbedder 0:6be57f391716 133 }
odtulumbedder 0:6be57f391716 134
odtulumbedder 0:6be57f391716 135 uint8_t lt_i2c_read_byte_data(
odtulumbedder 0:6be57f391716 136 uint8_t address,
odtulumbedder 0:6be57f391716 137 uint8_t command,
odtulumbedder 0:6be57f391716 138 uint8_t *value) {
odtulumbedder 0:6be57f391716 139 int8_t ret = 0;
odtulumbedder 0:6be57f391716 140 if (lt_i2c_start() != 0) // I2C START
odtulumbedder 0:6be57f391716 141 {
odtulumbedder 0:6be57f391716 142 return (1); // Stop and return 0 if START fail
odtulumbedder 0:6be57f391716 143 }
odtulumbedder 0:6be57f391716 144 ret |= lt_i2c_write((address << 1) | LT_I2C_WRITE_BIT); // Write 7 bit address with W bit
odtulumbedder 0:6be57f391716 145 if (ret != 0) // If NACK return 1
odtulumbedder 0:6be57f391716 146 {
odtulumbedder 0:6be57f391716 147 lt_i2c_stop(); // I2C STOP
odtulumbedder 0:6be57f391716 148 return (1);
odtulumbedder 0:6be57f391716 149 }
odtulumbedder 0:6be57f391716 150 ret |= lt_i2c_write(command); // Set register to be read to command
odtulumbedder 0:6be57f391716 151 if (ret != 0) // If NACK return 1
odtulumbedder 0:6be57f391716 152 {
odtulumbedder 0:6be57f391716 153 lt_i2c_stop(); // I2C STOP
odtulumbedder 0:6be57f391716 154 return (1);
odtulumbedder 0:6be57f391716 155 }
odtulumbedder 0:6be57f391716 156 if (lt_i2c_start() != 0) // I2C repeated START
odtulumbedder 0:6be57f391716 157 {
odtulumbedder 0:6be57f391716 158 lt_i2c_stop(); // Attempt to issue I2C STOP
odtulumbedder 0:6be57f391716 159 return (1); // Stop and return 0 if START fail
odtulumbedder 0:6be57f391716 160 }
odtulumbedder 0:6be57f391716 161 ret |= lt_i2c_write((address << 1) | LT_I2C_READ_BIT); // Write 7 bit address with R bit
odtulumbedder 0:6be57f391716 162 *value = lt_i2c_read(LT_I2C_WITH_NACK); // Read byte from buffer with NAK
odtulumbedder 0:6be57f391716 163 lt_i2c_stop(); // I2C STOP
odtulumbedder 0:6be57f391716 164 if (ret != 0) // If there was a NACK return 1
odtulumbedder 0:6be57f391716 165 {
odtulumbedder 0:6be57f391716 166 return (1);
odtulumbedder 0:6be57f391716 167 }
odtulumbedder 0:6be57f391716 168 return (0); // Return success
odtulumbedder 0:6be57f391716 169 }
odtulumbedder 0:6be57f391716 170
odtulumbedder 0:6be57f391716 171 uint8_t lt_i2c_read_word_data(
odtulumbedder 0:6be57f391716 172 uint8_t address,
odtulumbedder 0:6be57f391716 173 uint8_t command,
odtulumbedder 0:6be57f391716 174 uint16_t *value) {
odtulumbedder 0:6be57f391716 175 int8_t ret = 0;
odtulumbedder 0:6be57f391716 176 union {
odtulumbedder 0:6be57f391716 177 uint8_t b[2];
odtulumbedder 0:6be57f391716 178 uint16_t w;
odtulumbedder 0:6be57f391716 179 } data;
odtulumbedder 0:6be57f391716 180 if (lt_i2c_start() != 0) //I2C START
odtulumbedder 1:6d4265aa4184 181 {
odtulumbedder 0:6be57f391716 182 return (1); //Stop and return 0 if START fail
odtulumbedder 1:6d4265aa4184 183 }
odtulumbedder 0:6be57f391716 184 ret |= lt_i2c_write((address << 1) | LT_I2C_WRITE_BIT); // Write 7 bit address with W bit
odtulumbedder 0:6be57f391716 185 if (ret != 0) //If NACK return 1
odtulumbedder 0:6be57f391716 186 {
odtulumbedder 0:6be57f391716 187 lt_i2c_stop(); //I2C STOP
odtulumbedder 0:6be57f391716 188 return (1);
odtulumbedder 0:6be57f391716 189 }
odtulumbedder 0:6be57f391716 190 ret |= lt_i2c_write(command); // Set register to be read to command
odtulumbedder 0:6be57f391716 191 if (ret != 0) //If NACK return 1
odtulumbedder 0:6be57f391716 192 {
odtulumbedder 0:6be57f391716 193 lt_i2c_stop(); //I2C STOP
odtulumbedder 0:6be57f391716 194 return (1);
odtulumbedder 0:6be57f391716 195 }
odtulumbedder 0:6be57f391716 196 if (lt_i2c_start() != 0) //I2C START
odtulumbedder 0:6be57f391716 197 {
odtulumbedder 0:6be57f391716 198 lt_i2c_stop(); //Attempt to issue I2C STOP
odtulumbedder 0:6be57f391716 199 return (1); //Stop and return 0 if START fail
odtulumbedder 0:6be57f391716 200 }
odtulumbedder 0:6be57f391716 201 ret |= lt_i2c_write((address << 1) | LT_I2C_READ_BIT); // Write 7 bit address with R bit
odtulumbedder 0:6be57f391716 202 data.b[1] = lt_i2c_read(LT_I2C_WITH_ACK); // Read MSB from buffer
odtulumbedder 0:6be57f391716 203 data.b[0] = lt_i2c_read(LT_I2C_WITH_NACK); // Read LSB from buffer
odtulumbedder 0:6be57f391716 204 lt_i2c_stop(); //I2C STOP
odtulumbedder 0:6be57f391716 205 *value = data.w;
odtulumbedder 0:6be57f391716 206 if (ret != 0) //If NAK
odtulumbedder 1:6d4265aa4184 207 {
odtulumbedder 0:6be57f391716 208 return (1); //return 1
odtulumbedder 1:6d4265aa4184 209 }
odtulumbedder 0:6be57f391716 210 return (0); // Return success
odtulumbedder 0:6be57f391716 211 }
odtulumbedder 0:6be57f391716 212
odtulumbedder 0:6be57f391716 213 uint8_t lt_i2c_read_block_data(
odtulumbedder 0:6be57f391716 214 uint8_t address,
odtulumbedder 0:6be57f391716 215 uint8_t command,
odtulumbedder 0:6be57f391716 216 uint8_t length,
odtulumbedder 0:6be57f391716 217 uint8_t *values) {
odtulumbedder 0:6be57f391716 218 uint8_t i = (length - 1);
odtulumbedder 0:6be57f391716 219 int8_t ret = 0;
odtulumbedder 0:6be57f391716 220 if (lt_i2c_start() != 0) //I2C START
odtulumbedder 1:6d4265aa4184 221 {
odtulumbedder 0:6be57f391716 222 return (1); //Stop and return 0 if START fail
odtulumbedder 1:6d4265aa4184 223 }
odtulumbedder 0:6be57f391716 224 ret |= lt_i2c_write((address << 1) | LT_I2C_WRITE_BIT); //Write 7-bit address with W bit
odtulumbedder 0:6be57f391716 225 if (ret != 0) //If NACK return 1
odtulumbedder 0:6be57f391716 226 {
odtulumbedder 0:6be57f391716 227 lt_i2c_stop(); //I2C STOP
odtulumbedder 0:6be57f391716 228 return (1);
odtulumbedder 0:6be57f391716 229 }
odtulumbedder 0:6be57f391716 230 ret |= lt_i2c_write(command); //Write 8 bit command word
odtulumbedder 0:6be57f391716 231 if (ret != 0) //If NACK return 1
odtulumbedder 0:6be57f391716 232 {
odtulumbedder 0:6be57f391716 233 lt_i2c_stop(); //I2C STOP
odtulumbedder 0:6be57f391716 234 return (1);
odtulumbedder 0:6be57f391716 235 }
odtulumbedder 0:6be57f391716 236 if (lt_i2c_start() != 0) //I2C repeated START
odtulumbedder 0:6be57f391716 237 {
odtulumbedder 0:6be57f391716 238 lt_i2c_stop(); //Attempt to issue I2C STOP
odtulumbedder 0:6be57f391716 239 return (1); //Stop and return 0 if START fail
odtulumbedder 0:6be57f391716 240 }
odtulumbedder 0:6be57f391716 241 ret |= lt_i2c_write((address << 1) | LT_I2C_READ_BIT); //Write 7-bit address with R bit
odtulumbedder 0:6be57f391716 242 if (ret != 0) //If NACK return 1
odtulumbedder 0:6be57f391716 243 {
odtulumbedder 0:6be57f391716 244 lt_i2c_stop(); //I2C STOP
odtulumbedder 0:6be57f391716 245 return (1);
odtulumbedder 0:6be57f391716 246 }
odtulumbedder 0:6be57f391716 247 while (i > 0) //Begin read loop
odtulumbedder 0:6be57f391716 248 {
odtulumbedder 0:6be57f391716 249 values[i] = lt_i2c_read(LT_I2C_WITH_ACK); //Read from bus with ACK
odtulumbedder 0:6be57f391716 250 i--;
odtulumbedder 0:6be57f391716 251 }
odtulumbedder 0:6be57f391716 252 values[0] = lt_i2c_read(LT_I2C_WITH_NACK); //Read from bus with NACK for the last one;
odtulumbedder 0:6be57f391716 253 lt_i2c_stop(); //I2C STOP
odtulumbedder 0:6be57f391716 254 return (0); // Success!
odtulumbedder 0:6be57f391716 255 }
odtulumbedder 0:6be57f391716 256
odtulumbedder 0:6be57f391716 257 }