Kevin Braun / bq27220

TI BQ27220 I2C based, battery State of Charge and Coulomb Counter

Fork of bq27210 by Kevin Braun

bq27210.cpp@1:ab433d7c3e30, 2017-06-19 (annotated)

Committer:
loopsva
Date:
Mon Jun 19 22:28:50 2017 +0000
Revision:
1:ab433d7c3e30
Parent:
0:96d5698a376f 
Made the same as CLI version

Who changed what in which revision?

UserRevisionLine numberNew contents of line
loopsva 0:96d5698a376f 1 #include "mbed.h"
loopsva 0:96d5698a376f 2 #include "bq27210.h"
loopsva 0:96d5698a376f 3 #define i2c_Buf dataSTR.i2c_Bufx
loopsva 1:ab433d7c3e30 4 /*
loopsva 1:ab433d7c3e30 5 BQ27210::BQ27210(PinName p_sda, PinName p_scl) :
loopsva 0:96d5698a376f 6 _i2c(p_sda, p_scl)
loopsva 0:96d5698a376f 7 {
loopsva 0:96d5698a376f 8 _i2c.frequency(100000);
loopsva 0:96d5698a376f 9 }
loopsva 1:ab433d7c3e30 10 */
loopsva 1:ab433d7c3e30 11
loopsva 1:ab433d7c3e30 12 BQ27210::BQ27210(PinName p_sda, PinName p_scl, PinName p_pgrm) :
loopsva 1:ab433d7c3e30 13 _i2c(p_sda, p_scl),
loopsva 1:ab433d7c3e30 14 _pgm(p_pgrm, 0)
loopsva 1:ab433d7c3e30 15 {
loopsva 1:ab433d7c3e30 16 _i2c.frequency(100000);
loopsva 1:ab433d7c3e30 17 }
loopsva 1:ab433d7c3e30 18
loopsva 1:ab433d7c3e30 19 void BQ27210::default_init(BQ27210_TypeDef& dataSTR)
loopsva 1:ab433d7c3e30 20 {
loopsva 1:ab433d7c3e30 21 dataSTR.shunt_res = BQ_SHUNT_RESISTOR;
loopsva 1:ab433d7c3e30 22 dataSTR.cmmd_key = BQ_COMMAND_0xA9;
loopsva 1:ab433d7c3e30 23
loopsva 1:ab433d7c3e30 24 //write AR register
loopsva 1:ab433d7c3e30 25 i2c_Buf[0] = BQ_AR_HI;
loopsva 1:ab433d7c3e30 26 i2c_Buf[1] = BQ_AR_VALUE >> 8;
loopsva 1:ab433d7c3e30 27 _i2c.write((int)BQ27210_ADDR, i2c_Buf, 2, false);
loopsva 1:ab433d7c3e30 28 i2c_Buf[0] = BQ_AR_LO;
loopsva 1:ab433d7c3e30 29 i2c_Buf[1] = BQ_AR_VALUE & 255;
loopsva 1:ab433d7c3e30 30 _i2c.write((int)BQ27210_ADDR, i2c_Buf, 2, false);
loopsva 1:ab433d7c3e30 31 }
loopsva 1:ab433d7c3e30 32
loopsva 1:ab433d7c3e30 33 int BQ27210::new_battery_init(BQ27210_TypeDef& dataSTR)
loopsva 1:ab433d7c3e30 34 {
loopsva 1:ab433d7c3e30 35 //get the MODE register
loopsva 1:ab433d7c3e30 36 i2c_Buf[0] = BQ_MODE;
loopsva 1:ab433d7c3e30 37 _i2c.write((int)BQ27210_ADDR, i2c_Buf, 1, true);
loopsva 1:ab433d7c3e30 38 _i2c.read((int)BQ27210_ADDR +1, i2c_Buf, 1, false);
loopsva 1:ab433d7c3e30 39 char modeR = i2c_Buf[0];
loopsva 1:ab433d7c3e30 40 //write DONE bit to MODE reg
loopsva 1:ab433d7c3e30 41 i2c_Buf[0] = BQ_MODE;
loopsva 1:ab433d7c3e30 42 i2c_Buf[1] = modeR | BQ_BIT_DONE;
loopsva 1:ab433d7c3e30 43 _i2c.write((int)BQ27210_ADDR, i2c_Buf, 2, false);
loopsva 1:ab433d7c3e30 44 //write command
loopsva 1:ab433d7c3e30 45 i2c_Buf[0] = BQ_CRTL;
loopsva 1:ab433d7c3e30 46 i2c_Buf[1] = BQ_COMMAND_0xA9;
loopsva 1:ab433d7c3e30 47 _i2c.write((int)BQ27210_ADDR, i2c_Buf, 2, false);
loopsva 1:ab433d7c3e30 48 int i = 0;
loopsva 1:ab433d7c3e30 49 for(i = 0; i < 500; i++) {
loopsva 1:ab433d7c3e30 50 //Thread::wait(1);
loopsva 1:ab433d7c3e30 51 wait_ms(1);
loopsva 1:ab433d7c3e30 52 i2c_Buf[0] = BQ_CRTL;
loopsva 1:ab433d7c3e30 53 _i2c.write((int)BQ27210_ADDR, i2c_Buf, 1, true);
loopsva 1:ab433d7c3e30 54 _i2c.read((int)BQ27210_ADDR +1, i2c_Buf, 1, false);
loopsva 1:ab433d7c3e30 55 if(!(i2c_Buf[0])) break;
loopsva 1:ab433d7c3e30 56 }
loopsva 1:ab433d7c3e30 57 if(i > 498) return(i); // 40 fails, 50 passes
loopsva 1:ab433d7c3e30 58
loopsva 1:ab433d7c3e30 59 //get the MODE register
loopsva 1:ab433d7c3e30 60 i2c_Buf[0] = BQ_MODE;
loopsva 1:ab433d7c3e30 61 _i2c.write((int)BQ27210_ADDR, i2c_Buf, 1, true);
loopsva 1:ab433d7c3e30 62 _i2c.read((int)BQ27210_ADDR +1, i2c_Buf, 1, false);
loopsva 1:ab433d7c3e30 63 modeR = i2c_Buf[0];
loopsva 1:ab433d7c3e30 64 //write PRST bit to MODE reg
loopsva 1:ab433d7c3e30 65 i2c_Buf[0] = BQ_MODE;
loopsva 1:ab433d7c3e30 66 i2c_Buf[1] = modeR | BQ_BIT_PRST;
loopsva 1:ab433d7c3e30 67 _i2c.write((int)BQ27210_ADDR, i2c_Buf, 2, false);
loopsva 1:ab433d7c3e30 68 //write command
loopsva 1:ab433d7c3e30 69 i2c_Buf[0] = BQ_CRTL;
loopsva 1:ab433d7c3e30 70 i2c_Buf[1] = BQ_COMMAND_0xA9;
loopsva 1:ab433d7c3e30 71 _i2c.write((int)BQ27210_ADDR, i2c_Buf, 2, false);
loopsva 1:ab433d7c3e30 72 return(0);
loopsva 1:ab433d7c3e30 73 }
loopsva 0:96d5698a376f 74
loopsva 0:96d5698a376f 75 int BQ27210::read_registers(BQ27210_TypeDef& dataSTR)
loopsva 0:96d5698a376f 76 {
loopsva 0:96d5698a376f 77 i2c_Buf[0] = BQ_CRTL;
loopsva 0:96d5698a376f 78 int result = _i2c.write((int)BQ27210_ADDR, i2c_Buf, 1, true);
loopsva 0:96d5698a376f 79 if(result) return(result);
loopsva 0:96d5698a376f 80 _i2c.read((int)BQ27210_ADDR +1, i2c_Buf, 45, false);
loopsva 0:96d5698a376f 81
loopsva 0:96d5698a376f 82 dataSTR.cntlReg = i2c_Buf[BQ_CRTL];
loopsva 0:96d5698a376f 83 dataSTR.modeReg = i2c_Buf[BQ_MODE];
loopsva 0:96d5698a376f 84 dataSTR.arReg = (i2c_Buf[BQ_AR_HI] << 8) | i2c_Buf[BQ_AR_LO];
loopsva 0:96d5698a376f 85 dataSTR.artteReg = (i2c_Buf[BQ_ARTTE_HI] << 8) | i2c_Buf[BQ_ARTTE_LO];
loopsva 0:96d5698a376f 86 dataSTR.tempReg = (i2c_Buf[BQ_TEMP_HI] << 8) | i2c_Buf[BQ_TEMP_LO];
loopsva 0:96d5698a376f 87 dataSTR.voltReg = (i2c_Buf[BQ_VOLT_HI] << 8) | i2c_Buf[BQ_VOLT_LO];
loopsva 0:96d5698a376f 88 dataSTR.flagsReg = i2c_Buf[BQ_FLAGS];
loopsva 0:96d5698a376f 89 dataSTR.rsocReg = i2c_Buf[BQ_RSOC];
loopsva 0:96d5698a376f 90 dataSTR.nacReg = (i2c_Buf[BQ_NAC_HI] << 8) | i2c_Buf[BQ_NAC_LO];
loopsva 0:96d5698a376f 91 dataSTR.lmdReg = (i2c_Buf[BQ_LMD_HI] << 8) | i2c_Buf[BQ_LMD_LO];
loopsva 0:96d5698a376f 92 dataSTR.cacReg = (i2c_Buf[BQ_CAC_HI] << 8) | i2c_Buf[BQ_CAC_LO];
loopsva 0:96d5698a376f 93 dataSTR.fcacReg = (i2c_Buf[BQ_FCAC_HI] << 8) | i2c_Buf[BQ_FCAC_LO];
loopsva 0:96d5698a376f 94 dataSTR.aiReg = (i2c_Buf[BQ_AI_HI] << 8) | i2c_Buf[BQ_AI_LO];
loopsva 0:96d5698a376f 95 dataSTR.tteReg = (i2c_Buf[BQ_TTE_HI] << 8) | i2c_Buf[BQ_TTE_LO];
loopsva 0:96d5698a376f 96 dataSTR.ttfReg = (i2c_Buf[BQ_TTF_HI] << 8) | i2c_Buf[BQ_TTF_LO];
loopsva 0:96d5698a376f 97 dataSTR.siReg = (i2c_Buf[BQ_SI_HI] << 8) | i2c_Buf[BQ_SI_LO];
loopsva 0:96d5698a376f 98 dataSTR.stteReg = (i2c_Buf[BQ_STTE_HI] << 8) | i2c_Buf[BQ_STTE_LO];
loopsva 0:96d5698a376f 99 dataSTR.junk1 = (i2c_Buf[BQ_STTE_HI +2] << 8) | i2c_Buf[BQ_STTE_LO +2];
loopsva 0:96d5698a376f 100 dataSTR.cedvReg = (i2c_Buf[BQ_CEDV_HI] << 8) | i2c_Buf[BQ_CEDV_LO];
loopsva 0:96d5698a376f 101 dataSTR.junk2 = (i2c_Buf[BQ_CEDV_HI +2] << 8) | i2c_Buf[BQ_CEDV_LO +2];
loopsva 0:96d5698a376f 102 dataSTR.junk3 = (i2c_Buf[BQ_CEDV_HI +4] << 8) | i2c_Buf[BQ_CEDV_LO +4];
loopsva 0:96d5698a376f 103 dataSTR.ttecpReg = (i2c_Buf[BQ_TTECP_HI] << 8) | i2c_Buf[BQ_TTECP_LO];
loopsva 0:96d5698a376f 104 dataSTR.cyclReg = (i2c_Buf[BQ_CYCL_HI] << 8) | i2c_Buf[BQ_CYCL_LO];
loopsva 0:96d5698a376f 105 dataSTR.cyctReg = (i2c_Buf[BQ_CYCT_HI] << 8) | i2c_Buf[BQ_CYCT_LO];
loopsva 0:96d5698a376f 106 dataSTR.csocReg = i2c_Buf[BQ_CSOC];
loopsva 0:96d5698a376f 107 return(0);
loopsva 0:96d5698a376f 108 }
loopsva 0:96d5698a376f 109
loopsva 0:96d5698a376f 110 int BQ27210::read_eep_registers(BQ27210_TypeDef& dataSTR)
loopsva 0:96d5698a376f 111 {
loopsva 0:96d5698a376f 112 i2c_Buf[0] = BQ_EE_EN;
loopsva 0:96d5698a376f 113 int result = _i2c.write((int)BQ27210_ADDR, i2c_Buf, 1, true);
loopsva 0:96d5698a376f 114 if(result) return(result);
loopsva 0:96d5698a376f 115 _i2c.read((int)BQ27210_ADDR +1, i2c_Buf, 1, false);
loopsva 0:96d5698a376f 116 dataSTR.eeEnReg = i2c_Buf[0];
loopsva 0:96d5698a376f 117
loopsva 0:96d5698a376f 118 i2c_Buf[0] = BQ_ILMD;
loopsva 0:96d5698a376f 119 result = _i2c.write((int)BQ27210_ADDR, i2c_Buf, 1, true);
loopsva 0:96d5698a376f 120 _i2c.read((int)BQ27210_ADDR +1, i2c_Buf, 10, false);
loopsva 0:96d5698a376f 121 dataSTR.ilmdReg = i2c_Buf[0];
loopsva 0:96d5698a376f 122 dataSTR.sedvfReg = i2c_Buf[1];
loopsva 0:96d5698a376f 123 dataSTR.sedv1Reg = i2c_Buf[2];
loopsva 0:96d5698a376f 124 dataSTR.islcEdvtReg = i2c_Buf[3];
loopsva 0:96d5698a376f 125 dataSTR.dmfsdReg = i2c_Buf[4];
loopsva 0:96d5698a376f 126 dataSTR.taperReg = i2c_Buf[5];
loopsva 0:96d5698a376f 127 dataSTR.pkcfgReg = i2c_Buf[6];
loopsva 0:96d5698a376f 128 dataSTR.gafDedvReg = i2c_Buf[7];
loopsva 0:96d5698a376f 129 dataSTR.dcompReg = i2c_Buf[8];
loopsva 0:96d5698a376f 130 dataSTR.tcompReg = i2c_Buf[9];
loopsva 1:ab433d7c3e30 131 return(20);
loopsva 1:ab433d7c3e30 132 }
loopsva 1:ab433d7c3e30 133
loopsva 1:ab433d7c3e30 134 int BQ27210::write_eep_registers(BQ27210_TypeDef& dataSTR)
loopsva 1:ab433d7c3e30 135 {
loopsva 1:ab433d7c3e30 136 //first get old data and enable writing to EEPROM
loopsva 1:ab433d7c3e30 137 int result = read_eep_registers(dataSTR);
loopsva 1:ab433d7c3e30 138 if(result) return(21);
loopsva 1:ab433d7c3e30 139 i2c_Buf[0] = BQ_EE_EN;
loopsva 1:ab433d7c3e30 140 i2c_Buf[1] = BQ_EE_WRITE_EN;
loopsva 1:ab433d7c3e30 141 result = _i2c.write((int)BQ27210_ADDR, i2c_Buf, 2, false);
loopsva 1:ab433d7c3e30 142 if(result) return(22);
loopsva 1:ab433d7c3e30 143
loopsva 1:ab433d7c3e30 144 //setup and write new values to EEPROM
loopsva 1:ab433d7c3e30 145 i2c_Buf[1] = BQ_ILMD;
loopsva 1:ab433d7c3e30 146 //i2c_Buf[2] = dataSTR.ilmdReg;
loopsva 1:ab433d7c3e30 147 //i2c_Buf[3] = dataSTR.sedvfReg;
loopsva 1:ab433d7c3e30 148 //i2c_Buf[4] = dataSTR.sedv1Reg;
loopsva 1:ab433d7c3e30 149 i2c_Buf[5] = dataSTR.islcEdvtReg;
loopsva 1:ab433d7c3e30 150 i2c_Buf[6] = dataSTR.dmfsdReg;
loopsva 1:ab433d7c3e30 151 i2c_Buf[7] = dataSTR.taperReg;
loopsva 1:ab433d7c3e30 152 i2c_Buf[8] = dataSTR.pkcfgReg;
loopsva 1:ab433d7c3e30 153 i2c_Buf[9] = dataSTR.gafDedvReg;
loopsva 1:ab433d7c3e30 154 i2c_Buf[10] = dataSTR.dcompReg;
loopsva 1:ab433d7c3e30 155 i2c_Buf[11] = dataSTR.tcompReg;
loopsva 1:ab433d7c3e30 156
loopsva 1:ab433d7c3e30 157 i2c_Buf[2] = BQ_NEW_ILMD;
loopsva 1:ab433d7c3e30 158 i2c_Buf[3] = BQ_NEW_SEDVF;
loopsva 1:ab433d7c3e30 159 i2c_Buf[4] = BQ_NEW_SEDV1;
loopsva 1:ab433d7c3e30 160 result = _i2c.write((int)BQ27210_ADDR, i2c_Buf+1, 10, false);
loopsva 1:ab433d7c3e30 161 if(result) return(23);
loopsva 1:ab433d7c3e30 162
loopsva 1:ab433d7c3e30 163 //now program each register
loopsva 1:ab433d7c3e30 164 int i = 0;
loopsva 1:ab433d7c3e30 165 for(i = BQ_ILMD; i <= BQ_TCOMP; i++) {
loopsva 1:ab433d7c3e30 166 i2c_Buf[0] = i2c_Buf[i + 1];
loopsva 1:ab433d7c3e30 167 result = _i2c.write((int)BQ27210_ADDR, i2c_Buf, 1, true);
loopsva 1:ab433d7c3e30 168 _i2c.read((int)BQ27210_ADDR +1, i2c_Buf, 1, false);
loopsva 1:ab433d7c3e30 169 _pgm = 1;
loopsva 1:ab433d7c3e30 170 //Thread::wait(50);
loopsva 1:ab433d7c3e30 171 wait_ms(50);
loopsva 1:ab433d7c3e30 172 _pgm = 0;
loopsva 1:ab433d7c3e30 173 if(result) break;
loopsva 1:ab433d7c3e30 174 }
loopsva 1:ab433d7c3e30 175
loopsva 1:ab433d7c3e30 176 //finally, disable writing of EEPROM
loopsva 1:ab433d7c3e30 177 i2c_Buf[0] = BQ_EE_EN;
loopsva 1:ab433d7c3e30 178 i2c_Buf[1] = 0;
loopsva 1:ab433d7c3e30 179 _i2c.write((int)BQ27210_ADDR, i2c_Buf, 2, false);
loopsva 1:ab433d7c3e30 180 if(result) return(i);
loopsva 0:96d5698a376f 181 return(0);
loopsva 1:ab433d7c3e30 182 }