Team Fox / Mbed 2 deprecated TFR_BAE_vr1_1_Debug153

To be debugged

Dependencies:   FreescaleIAP mbed-rtos mbed

Fork of TFR_BAE_vr1_1_Debug153 by Bragadeesh S

EPS.cpp@0:7b4c00e3912f, 2015-12-24 (annotated)

Committer:
sakthipriya
Date:
Thu Dec 24 19:15:43 2015 +0000
Revision:
0:7b4c00e3912f
Child:
1:446a959e36ce
EPS CONOPS BTRY GAUGE

Who changed what in which revision?

UserRevisionLine numberNew contents of line
sakthipriya 0:7b4c00e3912f 1 #include "EPS.h"
sakthipriya 0:7b4c00e3912f 2 #include "pin_config.h"
sakthipriya 0:7b4c00e3912f 3 /***********************************************global variable declaration***************************************************************/
sakthipriya 0:7b4c00e3912f 4 extern uint32_t BAE_STATUS;
sakthipriya 0:7b4c00e3912f 5 extern uint32_t BAE_ENABLE;
sakthipriya 0:7b4c00e3912f 6
sakthipriya 0:7b4c00e3912f 7
sakthipriya 0:7b4c00e3912f 8 //m_I2C.frequency(10000)
sakthipriya 0:7b4c00e3912f 9 const char RCOMP0= 0x97;
sakthipriya 0:7b4c00e3912f 10 BAE_HK_actual actual_data;
sakthipriya 0:7b4c00e3912f 11 BAE_HK_quant quant_data;
sakthipriya 0:7b4c00e3912f 12 BAE_HK_min_max bae_HK_minmax;
sakthipriya 0:7b4c00e3912f 13 BAE_HK_arch arch_data;
sakthipriya 0:7b4c00e3912f 14
sakthipriya 0:7b4c00e3912f 15 //......................................Peripheral declarations.........................................................//
sakthipriya 0:7b4c00e3912f 16 Serial pc_eps(USBTX,USBRX);
sakthipriya 0:7b4c00e3912f 17 I2C m_I2C(PIN85,PIN84);
sakthipriya 0:7b4c00e3912f 18 DigitalOut TRXY(TRXY_DR_EN); //active high
sakthipriya 0:7b4c00e3912f 19 DigitalOut TRZ(TRZ_DR_EN); //active high
sakthipriya 0:7b4c00e3912f 20 DigitalOut EN3V3A(ENBL3V3A);
sakthipriya 0:7b4c00e3912f 21 DigitalOut EN_BTRY_HT(BATT_HEAT);
sakthipriya 0:7b4c00e3912f 22 //DigitalIn BTRY_HT_OUTPUT(BATT_HEAT_OUTPUT);
sakthipriya 0:7b4c00e3912f 23 AnalogIn Vbatt_ang(VBATT);
sakthipriya 0:7b4c00e3912f 24
sakthipriya 0:7b4c00e3912f 25 //*********************************************************flags********************************************************//
sakthipriya 0:7b4c00e3912f 26 extern char EPS_INIT_STATUS ;
sakthipriya 0:7b4c00e3912f 27 extern char EPS_BATTERY_GAUGE_STATUS ;
sakthipriya 0:7b4c00e3912f 28 extern char EPS_MAIN_STATUS;
sakthipriya 0:7b4c00e3912f 29 extern char EPS_BATTERY_TEMP_STATUS ;
sakthipriya 0:7b4c00e3912f 30 extern char EPS_STATUS ;
sakthipriya 0:7b4c00e3912f 31
sakthipriya 0:7b4c00e3912f 32 extern char EPS_BATTERY_HEAT_ENABLE ;
sakthipriya 0:7b4c00e3912f 33
sakthipriya 0:7b4c00e3912f 34 //........................................... FUCTIONS.................................................//
sakthipriya 0:7b4c00e3912f 35
sakthipriya 0:7b4c00e3912f 36 void FCTN_EPS_INIT()
sakthipriya 0:7b4c00e3912f 37 {
sakthipriya 0:7b4c00e3912f 38 printf("\n\r eps init \n");
sakthipriya 0:7b4c00e3912f 39 EPS_INIT_STATUS = 's' ; //set EPS_INIT_STATUS flag
sakthipriya 0:7b4c00e3912f 40 // FLAG();
sakthipriya 0:7b4c00e3912f 41 FCTN_BATTERYGAUGE_INIT();
sakthipriya 0:7b4c00e3912f 42 //FCTN_EPS_BTEMP_INIT();
sakthipriya 0:7b4c00e3912f 43 EN3V3A = 1; //enable dc dc converter A
sakthipriya 0:7b4c00e3912f 44 char value=alertFlags();
sakthipriya 0:7b4c00e3912f 45 unsigned short value_u= (short int )value;
sakthipriya 0:7b4c00e3912f 46 value_u &=0x0001;
sakthipriya 0:7b4c00e3912f 47 if(value_u ==0x0001) // battery gauge not initialised
sakthipriya 0:7b4c00e3912f 48 {
sakthipriya 0:7b4c00e3912f 49 actual_data.power_mode = 1;
sakthipriya 0:7b4c00e3912f 50 EPS_BATTERY_GAUGE_STATUS = 'c'; //clear EPS_BATTERY_GAUGE_STATUS
sakthipriya 0:7b4c00e3912f 51 }
sakthipriya 0:7b4c00e3912f 52 else
sakthipriya 0:7b4c00e3912f 53 {
sakthipriya 0:7b4c00e3912f 54 actual_data.Batt_gauge_actual[1] = soc();
sakthipriya 0:7b4c00e3912f 55 actual_data.Batt_voltage_actual = Vbatt_ang.read()*3.3;
sakthipriya 0:7b4c00e3912f 56 FCTN_EPS_POWERMODE(actual_data.Batt_gauge_actual[1]);
sakthipriya 0:7b4c00e3912f 57 EPS_BATTERY_GAUGE_STATUS = 's'; //set EPS_BATTERY_GAUGE_STATUS
sakthipriya 0:7b4c00e3912f 58 }
sakthipriya 0:7b4c00e3912f 59
sakthipriya 0:7b4c00e3912f 60 EPS_INIT_STATUS = 'c' ; //clear EPS_INIT_STATUS flag
sakthipriya 0:7b4c00e3912f 61
sakthipriya 0:7b4c00e3912f 62 }
sakthipriya 0:7b4c00e3912f 63
sakthipriya 0:7b4c00e3912f 64 //----------------------------------------------------Power algo code--------------------------------------------------------------------//
sakthipriya 0:7b4c00e3912f 65 void FCTN_EPS_POWERMODE(float soc) //dummy algo
sakthipriya 0:7b4c00e3912f 66 {
sakthipriya 0:7b4c00e3912f 67 if(soc >= 80)
sakthipriya 0:7b4c00e3912f 68 actual_data.power_mode = 4;
sakthipriya 0:7b4c00e3912f 69 else if(soc >= 70 & soc < 80)
sakthipriya 0:7b4c00e3912f 70 actual_data.power_mode = 3;
sakthipriya 0:7b4c00e3912f 71 else if(soc >= 60 & soc < 70)
sakthipriya 0:7b4c00e3912f 72 actual_data.power_mode = 2;
sakthipriya 0:7b4c00e3912f 73 else if(soc < 60)
sakthipriya 0:7b4c00e3912f 74 actual_data.power_mode = 1;
sakthipriya 0:7b4c00e3912f 75 }
sakthipriya 0:7b4c00e3912f 76
sakthipriya 0:7b4c00e3912f 77 //...................................................HK...........................................//
sakthipriya 0:7b4c00e3912f 78
sakthipriya 0:7b4c00e3912f 79 int quantiz(float start,float step,float x)
sakthipriya 0:7b4c00e3912f 80 {
sakthipriya 0:7b4c00e3912f 81 int y=(x-start)/step;
sakthipriya 0:7b4c00e3912f 82 if(y<=0)y=0;
sakthipriya 0:7b4c00e3912f 83 if(y>=255)y=255;
sakthipriya 0:7b4c00e3912f 84 return y;
sakthipriya 0:7b4c00e3912f 85 }
sakthipriya 0:7b4c00e3912f 86
sakthipriya 0:7b4c00e3912f 87 void HK_main()
sakthipriya 0:7b4c00e3912f 88 {
sakthipriya 0:7b4c00e3912f 89
sakthipriya 0:7b4c00e3912f 90 }
sakthipriya 0:7b4c00e3912f 91
sakthipriya 0:7b4c00e3912f 92 //............................................BATTERY GAUGE......................................//
sakthipriya 0:7b4c00e3912f 93 void FCTN_BATTERYGAUGE_INIT()
sakthipriya 0:7b4c00e3912f 94 {
sakthipriya 0:7b4c00e3912f 95 disable_sleep();
sakthipriya 0:7b4c00e3912f 96 disable_hibernate();
sakthipriya 0:7b4c00e3912f 97 socChangeAlertEnabled(true); //enabling alert on soc changing by 1%
sakthipriya 0:7b4c00e3912f 98 emptyAlertThreshold(32);//setting empty alert threshold to 32% soc
sakthipriya 0:7b4c00e3912f 99 vAlertMinMaxThreshold();//set min, max value of Valrt register
sakthipriya 0:7b4c00e3912f 100 vResetThresholdSet();//set threshold voltage for reset
sakthipriya 0:7b4c00e3912f 101 vResetAlertEnabled(true);//enable alert on reset for V < Vreset
sakthipriya 0:7b4c00e3912f 102 }
sakthipriya 0:7b4c00e3912f 103
sakthipriya 0:7b4c00e3912f 104 void FCTN_BATTERYGAUGE_MAIN(float Battery_parameters[4])
sakthipriya 0:7b4c00e3912f 105 {
sakthipriya 0:7b4c00e3912f 106
sakthipriya 0:7b4c00e3912f 107
sakthipriya 0:7b4c00e3912f 108 float temp=25; //=Battery_temp (from temp sensor on battery board) //value of battery temperature in C currently given a dummy value. Should be updated everytime.
sakthipriya 0:7b4c00e3912f 109 tempCompensation(temp);
sakthipriya 0:7b4c00e3912f 110
sakthipriya 0:7b4c00e3912f 111
sakthipriya 0:7b4c00e3912f 112 Battery_parameters[0]=vcell();
sakthipriya 0:7b4c00e3912f 113 Battery_parameters[1]=soc();
sakthipriya 0:7b4c00e3912f 114 Battery_parameters[2]=crate();
sakthipriya 0:7b4c00e3912f 115
sakthipriya 0:7b4c00e3912f 116 printf("\nVcell=%f",vcell()); //remove this for final code
sakthipriya 0:7b4c00e3912f 117 printf("\nSOC=%f",soc()); //remove this for final code
sakthipriya 0:7b4c00e3912f 118 printf("\nC_rate=%f",crate()); //remove this for final code
sakthipriya 0:7b4c00e3912f 119
sakthipriya 0:7b4c00e3912f 120
sakthipriya 0:7b4c00e3912f 121 if (alerting()== true) //alert is on
sakthipriya 0:7b4c00e3912f 122 {
sakthipriya 0:7b4c00e3912f 123 Battery_parameters[3]=alertFlags();
sakthipriya 0:7b4c00e3912f 124 clearAlert();//clear alert
sakthipriya 0:7b4c00e3912f 125 clearAlertFlags();//clear all alert flags
sakthipriya 0:7b4c00e3912f 126 }
sakthipriya 0:7b4c00e3912f 127
sakthipriya 0:7b4c00e3912f 128 }
sakthipriya 0:7b4c00e3912f 129
sakthipriya 0:7b4c00e3912f 130 unsigned short read(char reg)
sakthipriya 0:7b4c00e3912f 131 {
sakthipriya 0:7b4c00e3912f 132
sakthipriya 0:7b4c00e3912f 133 //Create a temporary buffer
sakthipriya 0:7b4c00e3912f 134 char buff[2];
sakthipriya 0:7b4c00e3912f 135
sakthipriya 0:7b4c00e3912f 136 //Select the register
sakthipriya 0:7b4c00e3912f 137 m_I2C.write(m_ADDR, &reg, 1, true);
sakthipriya 0:7b4c00e3912f 138
sakthipriya 0:7b4c00e3912f 139 //Read the 16-bit register
sakthipriya 0:7b4c00e3912f 140 m_I2C.read(m_ADDR, buff, 2);
sakthipriya 0:7b4c00e3912f 141
sakthipriya 0:7b4c00e3912f 142 //Return the combined 16-bit value
sakthipriya 0:7b4c00e3912f 143 return (buff[0] << 8) | buff[1];
sakthipriya 0:7b4c00e3912f 144 }
sakthipriya 0:7b4c00e3912f 145
sakthipriya 0:7b4c00e3912f 146
sakthipriya 0:7b4c00e3912f 147 void write(char reg, unsigned short data)
sakthipriya 0:7b4c00e3912f 148 {
sakthipriya 0:7b4c00e3912f 149 //Create a temporary buffer
sakthipriya 0:7b4c00e3912f 150 char buff[3];
sakthipriya 0:7b4c00e3912f 151
sakthipriya 0:7b4c00e3912f 152 //Load the register address and 16-bit data
sakthipriya 0:7b4c00e3912f 153 buff[0] = reg;
sakthipriya 0:7b4c00e3912f 154 buff[1] = data >> 8;
sakthipriya 0:7b4c00e3912f 155 buff[2] = data;
sakthipriya 0:7b4c00e3912f 156
sakthipriya 0:7b4c00e3912f 157 //Write the data
sakthipriya 0:7b4c00e3912f 158 m_I2C.write(m_ADDR, buff, 3);
sakthipriya 0:7b4c00e3912f 159 }
sakthipriya 0:7b4c00e3912f 160
sakthipriya 0:7b4c00e3912f 161
sakthipriya 0:7b4c00e3912f 162
sakthipriya 0:7b4c00e3912f 163 // Command the MAX17049 to perform a power-on reset
sakthipriya 0:7b4c00e3912f 164 void reset()
sakthipriya 0:7b4c00e3912f 165 {
sakthipriya 0:7b4c00e3912f 166 //Write the POR command
sakthipriya 0:7b4c00e3912f 167 write(REG_CMD, 0x5400);
sakthipriya 0:7b4c00e3912f 168 }
sakthipriya 0:7b4c00e3912f 169
sakthipriya 0:7b4c00e3912f 170 // Command the MAX17049 to perform a QuickStart
sakthipriya 0:7b4c00e3912f 171 void quickStart()
sakthipriya 0:7b4c00e3912f 172 {
sakthipriya 0:7b4c00e3912f 173 //Read the current 16-bit register value
sakthipriya 0:7b4c00e3912f 174 unsigned short value = read(REG_MODE);
sakthipriya 0:7b4c00e3912f 175
sakthipriya 0:7b4c00e3912f 176 //Set the QuickStart bit
sakthipriya 0:7b4c00e3912f 177 value |= (1 << 14);
sakthipriya 0:7b4c00e3912f 178
sakthipriya 0:7b4c00e3912f 179 //Write the value back out
sakthipriya 0:7b4c00e3912f 180 write(REG_MODE, value);
sakthipriya 0:7b4c00e3912f 181 }
sakthipriya 0:7b4c00e3912f 182
sakthipriya 0:7b4c00e3912f 183
sakthipriya 0:7b4c00e3912f 184 //disable sleep
sakthipriya 0:7b4c00e3912f 185 void disable_sleep()
sakthipriya 0:7b4c00e3912f 186 {
sakthipriya 0:7b4c00e3912f 187 unsigned short value = read(REG_MODE);
sakthipriya 0:7b4c00e3912f 188 value &= ~(1 << 13);
sakthipriya 0:7b4c00e3912f 189 write(REG_MODE, value);
sakthipriya 0:7b4c00e3912f 190 }
sakthipriya 0:7b4c00e3912f 191
sakthipriya 0:7b4c00e3912f 192 //disable the hibernate of the MAX17049
sakthipriya 0:7b4c00e3912f 193 void disable_hibernate()
sakthipriya 0:7b4c00e3912f 194 {
sakthipriya 0:7b4c00e3912f 195 write(REG_HIBRT, 0x0000);
sakthipriya 0:7b4c00e3912f 196 }
sakthipriya 0:7b4c00e3912f 197
sakthipriya 0:7b4c00e3912f 198
sakthipriya 0:7b4c00e3912f 199 // Enable or disable the SOC 1% change alert on the MAX17049
sakthipriya 0:7b4c00e3912f 200 void socChangeAlertEnabled(bool enabled)
sakthipriya 0:7b4c00e3912f 201 {
sakthipriya 0:7b4c00e3912f 202 //Read the current 16-bit register value
sakthipriya 0:7b4c00e3912f 203 unsigned short value = read(REG_CONFIG);
sakthipriya 0:7b4c00e3912f 204
sakthipriya 0:7b4c00e3912f 205 //Set or clear the ALSC bit
sakthipriya 0:7b4c00e3912f 206 if (enabled)
sakthipriya 0:7b4c00e3912f 207 value |= (1 << 6);
sakthipriya 0:7b4c00e3912f 208 else
sakthipriya 0:7b4c00e3912f 209 value &= ~(1 << 6);
sakthipriya 0:7b4c00e3912f 210
sakthipriya 0:7b4c00e3912f 211 //Write the value back out
sakthipriya 0:7b4c00e3912f 212 write(REG_CONFIG, value);
sakthipriya 0:7b4c00e3912f 213 }
sakthipriya 0:7b4c00e3912f 214
sakthipriya 0:7b4c00e3912f 215
sakthipriya 0:7b4c00e3912f 216 void compensation(char rcomp)
sakthipriya 0:7b4c00e3912f 217 {
sakthipriya 0:7b4c00e3912f 218 //Read the current 16-bit register value
sakthipriya 0:7b4c00e3912f 219 unsigned short value = read(REG_CONFIG);
sakthipriya 0:7b4c00e3912f 220
sakthipriya 0:7b4c00e3912f 221 //Update the register value
sakthipriya 0:7b4c00e3912f 222 value &= 0x00FF;
sakthipriya 0:7b4c00e3912f 223 value |= rcomp << 8;
sakthipriya 0:7b4c00e3912f 224
sakthipriya 0:7b4c00e3912f 225 //Write the value back out
sakthipriya 0:7b4c00e3912f 226 write(REG_CONFIG, value);
sakthipriya 0:7b4c00e3912f 227 }
sakthipriya 0:7b4c00e3912f 228
sakthipriya 0:7b4c00e3912f 229
sakthipriya 0:7b4c00e3912f 230 void tempCompensation(float temp)
sakthipriya 0:7b4c00e3912f 231 {
sakthipriya 0:7b4c00e3912f 232 //Calculate the new RCOMP value
sakthipriya 0:7b4c00e3912f 233 char rcomp;
sakthipriya 0:7b4c00e3912f 234 if (temp > 20.0) {
sakthipriya 0:7b4c00e3912f 235 rcomp = RCOMP0 + (temp - 20.0) * -0.5;
sakthipriya 0:7b4c00e3912f 236 } else {
sakthipriya 0:7b4c00e3912f 237 rcomp = RCOMP0 + (temp - 20.0) * -5.0;
sakthipriya 0:7b4c00e3912f 238 }
sakthipriya 0:7b4c00e3912f 239
sakthipriya 0:7b4c00e3912f 240 //Update the RCOMP value
sakthipriya 0:7b4c00e3912f 241 compensation(rcomp);
sakthipriya 0:7b4c00e3912f 242 }
sakthipriya 0:7b4c00e3912f 243
sakthipriya 0:7b4c00e3912f 244 // Command the MAX17049 to de-assert the ALRT pin
sakthipriya 0:7b4c00e3912f 245 void clearAlert()
sakthipriya 0:7b4c00e3912f 246 {
sakthipriya 0:7b4c00e3912f 247 //Read the current 16-bit register value
sakthipriya 0:7b4c00e3912f 248 unsigned short value = read(REG_CONFIG);
sakthipriya 0:7b4c00e3912f 249
sakthipriya 0:7b4c00e3912f 250 //Clear the ALRT bit
sakthipriya 0:7b4c00e3912f 251 value &= ~(1 << 5);
sakthipriya 0:7b4c00e3912f 252
sakthipriya 0:7b4c00e3912f 253 //Write the value back out
sakthipriya 0:7b4c00e3912f 254 write(REG_CONFIG, value);
sakthipriya 0:7b4c00e3912f 255 }
sakthipriya 0:7b4c00e3912f 256
sakthipriya 0:7b4c00e3912f 257
sakthipriya 0:7b4c00e3912f 258 //Set the SOC empty alert threshold of the MAX17049
sakthipriya 0:7b4c00e3912f 259 void emptyAlertThreshold(char threshold)
sakthipriya 0:7b4c00e3912f 260 {
sakthipriya 0:7b4c00e3912f 261 //Read the current 16-bit register value
sakthipriya 0:7b4c00e3912f 262 unsigned short value = read(REG_CONFIG);
sakthipriya 0:7b4c00e3912f 263
sakthipriya 0:7b4c00e3912f 264 //Update the register value
sakthipriya 0:7b4c00e3912f 265 value &= 0xFFE0;
sakthipriya 0:7b4c00e3912f 266 value |= 32 - threshold;
sakthipriya 0:7b4c00e3912f 267
sakthipriya 0:7b4c00e3912f 268 //Write the 16-bit register
sakthipriya 0:7b4c00e3912f 269 write(REG_CONFIG, value);
sakthipriya 0:7b4c00e3912f 270 }
sakthipriya 0:7b4c00e3912f 271
sakthipriya 0:7b4c00e3912f 272 // Set the low and high voltage alert threshold of the MAX17049
sakthipriya 0:7b4c00e3912f 273 void vAlertMinMaxThreshold()
sakthipriya 0:7b4c00e3912f 274 {
sakthipriya 0:7b4c00e3912f 275 //Read the current 16-bit register value
sakthipriya 0:7b4c00e3912f 276 unsigned short value = read(REG_VALRT);
sakthipriya 0:7b4c00e3912f 277
sakthipriya 0:7b4c00e3912f 278 //Mask off the old value
sakthipriya 0:7b4c00e3912f 279
sakthipriya 0:7b4c00e3912f 280 value = 0x96D2;
sakthipriya 0:7b4c00e3912f 281
sakthipriya 0:7b4c00e3912f 282 //Write the 16-bit register
sakthipriya 0:7b4c00e3912f 283 write(REG_VALRT, value);
sakthipriya 0:7b4c00e3912f 284 }
sakthipriya 0:7b4c00e3912f 285
sakthipriya 0:7b4c00e3912f 286
sakthipriya 0:7b4c00e3912f 287 // Set the reset voltage threshold of the MAX17049
sakthipriya 0:7b4c00e3912f 288 void vResetThresholdSet()
sakthipriya 0:7b4c00e3912f 289 {
sakthipriya 0:7b4c00e3912f 290 //Read the current 16-bit register value
sakthipriya 0:7b4c00e3912f 291 unsigned short value = read(REG_VRESET_ID);
sakthipriya 0:7b4c00e3912f 292
sakthipriya 0:7b4c00e3912f 293 //Mask off the old //value
sakthipriya 0:7b4c00e3912f 294 value &= 0x00FF;//Dis=0
sakthipriya 0:7b4c00e3912f 295
sakthipriya 0:7b4c00e3912f 296 value |= 0x9400;//corresponding to 2.5 V
sakthipriya 0:7b4c00e3912f 297
sakthipriya 0:7b4c00e3912f 298
sakthipriya 0:7b4c00e3912f 299 //Write the 16-bit register
sakthipriya 0:7b4c00e3912f 300 write(REG_VRESET_ID, value);
sakthipriya 0:7b4c00e3912f 301 }
sakthipriya 0:7b4c00e3912f 302
sakthipriya 0:7b4c00e3912f 303
sakthipriya 0:7b4c00e3912f 304 // Enable or disable the voltage reset alert on the MAX17049
sakthipriya 0:7b4c00e3912f 305 void vResetAlertEnabled(bool enabled)
sakthipriya 0:7b4c00e3912f 306 {
sakthipriya 0:7b4c00e3912f 307 //Read the current 16-bit register value
sakthipriya 0:7b4c00e3912f 308 unsigned short value = read(REG_STATUS);
sakthipriya 0:7b4c00e3912f 309
sakthipriya 0:7b4c00e3912f 310 //Set or clear the EnVR bit
sakthipriya 0:7b4c00e3912f 311 if (enabled)
sakthipriya 0:7b4c00e3912f 312 value |= (1 << 14);
sakthipriya 0:7b4c00e3912f 313 else
sakthipriya 0:7b4c00e3912f 314 value &= ~(1 << 14);
sakthipriya 0:7b4c00e3912f 315
sakthipriya 0:7b4c00e3912f 316 //Write the value back out
sakthipriya 0:7b4c00e3912f 317 write(REG_STATUS, value);
sakthipriya 0:7b4c00e3912f 318 }
sakthipriya 0:7b4c00e3912f 319
sakthipriya 0:7b4c00e3912f 320 //Get the current alert flags on the MAX17049
sakthipriya 0:7b4c00e3912f 321 //refer datasheet-status registers section to decode it.
sakthipriya 0:7b4c00e3912f 322 char alertFlags()
sakthipriya 0:7b4c00e3912f 323 {
sakthipriya 0:7b4c00e3912f 324 //Read the 16-bit register value
sakthipriya 0:7b4c00e3912f 325 unsigned short value = read(REG_STATUS);
sakthipriya 0:7b4c00e3912f 326
sakthipriya 0:7b4c00e3912f 327 //Return only the flag bits
sakthipriya 0:7b4c00e3912f 328 return (value >> 8) & 0x3F;
sakthipriya 0:7b4c00e3912f 329 }
sakthipriya 0:7b4c00e3912f 330
sakthipriya 0:7b4c00e3912f 331 // Clear all the alert flags on the MAX17049
sakthipriya 0:7b4c00e3912f 332 void clearAlertFlags()
sakthipriya 0:7b4c00e3912f 333 {
sakthipriya 0:7b4c00e3912f 334 //Read the current 16-bit register value
sakthipriya 0:7b4c00e3912f 335 unsigned short value = read(REG_STATUS);
sakthipriya 0:7b4c00e3912f 336
sakthipriya 0:7b4c00e3912f 337 //Clear the specified flag bits
sakthipriya 0:7b4c00e3912f 338 value &= ~( 0x3F<< 8);
sakthipriya 0:7b4c00e3912f 339
sakthipriya 0:7b4c00e3912f 340 //Write the value back out
sakthipriya 0:7b4c00e3912f 341 write(REG_STATUS, value);
sakthipriya 0:7b4c00e3912f 342 }
sakthipriya 0:7b4c00e3912f 343
sakthipriya 0:7b4c00e3912f 344 // Get the current cell voltage measurement of the MAX17049
sakthipriya 0:7b4c00e3912f 345 float vcell()
sakthipriya 0:7b4c00e3912f 346 {
sakthipriya 0:7b4c00e3912f 347 //Read the 16-bit raw Vcell value
sakthipriya 0:7b4c00e3912f 348 unsigned short value = read(REG_VCELL);
sakthipriya 0:7b4c00e3912f 349
sakthipriya 0:7b4c00e3912f 350 //Return Vcell in volts
sakthipriya 0:7b4c00e3912f 351 return value * 0.000078125*2;
sakthipriya 0:7b4c00e3912f 352 }
sakthipriya 0:7b4c00e3912f 353
sakthipriya 0:7b4c00e3912f 354 // Get the current state of charge measurement of the MAX17049 as a float
sakthipriya 0:7b4c00e3912f 355 float soc()
sakthipriya 0:7b4c00e3912f 356 {
sakthipriya 0:7b4c00e3912f 357 unsigned short value;
sakthipriya 0:7b4c00e3912f 358 char buff[2];
sakthipriya 0:7b4c00e3912f 359
sakthipriya 0:7b4c00e3912f 360 //Select the register
sakthipriya 0:7b4c00e3912f 361 m_I2C.write(m_ADDR, &REG_SOC, 1, true);
sakthipriya 0:7b4c00e3912f 362
sakthipriya 0:7b4c00e3912f 363 //Read the 16-bit register
sakthipriya 0:7b4c00e3912f 364 bool ack = true;
sakthipriya 0:7b4c00e3912f 365 ack = m_I2C.read(m_ADDR, buff, 2);
sakthipriya 0:7b4c00e3912f 366
sakthipriya 0:7b4c00e3912f 367 //Return the combined 16-bit value
sakthipriya 0:7b4c00e3912f 368 value = (buff[0] << 8) | buff[1];
sakthipriya 0:7b4c00e3912f 369 /*
sakthipriya 0:7b4c00e3912f 370 //Read the 16-bit raw SOC value
sakthipriya 0:7b4c00e3912f 371 unsigned short value = read(REG_SOC);*/
sakthipriya 0:7b4c00e3912f 372
sakthipriya 0:7b4c00e3912f 373 //Return SOC in percent
sakthipriya 0:7b4c00e3912f 374 if(ack == 0)
sakthipriya 0:7b4c00e3912f 375 return value * 0.00390625;
sakthipriya 0:7b4c00e3912f 376 else
sakthipriya 0:7b4c00e3912f 377 return 200;
sakthipriya 0:7b4c00e3912f 378 }
sakthipriya 0:7b4c00e3912f 379
sakthipriya 0:7b4c00e3912f 380
sakthipriya 0:7b4c00e3912f 381
sakthipriya 0:7b4c00e3912f 382 // Get the current C rate measurement of the MAX17049
sakthipriya 0:7b4c00e3912f 383 float crate()
sakthipriya 0:7b4c00e3912f 384 {
sakthipriya 0:7b4c00e3912f 385 //Read the 16-bit raw C/Rate value
sakthipriya 0:7b4c00e3912f 386 short value = read(REG_CRATE);
sakthipriya 0:7b4c00e3912f 387
sakthipriya 0:7b4c00e3912f 388 //Return C/Rate in %/hr
sakthipriya 0:7b4c00e3912f 389 return value * 0.208;
sakthipriya 0:7b4c00e3912f 390 }
sakthipriya 0:7b4c00e3912f 391
sakthipriya 0:7b4c00e3912f 392 // Determine whether or not the MAX17049 is asserting the ALRT pin
sakthipriya 0:7b4c00e3912f 393 bool alerting()
sakthipriya 0:7b4c00e3912f 394 {
sakthipriya 0:7b4c00e3912f 395 //Read the 16-bit register value
sakthipriya 0:7b4c00e3912f 396 unsigned short value = read(REG_CONFIG);
sakthipriya 0:7b4c00e3912f 397
sakthipriya 0:7b4c00e3912f 398 //Return the status of the ALRT bit
sakthipriya 0:7b4c00e3912f 399 if (value & (1 << 5))
sakthipriya 0:7b4c00e3912f 400 return true;
sakthipriya 0:7b4c00e3912f 401 else
sakthipriya 0:7b4c00e3912f 402 return false;
sakthipriya 0:7b4c00e3912f 403 }