Tyler Sisk
Library to interface to the TI BQ27441, a fuel gauge monitor
Fork of
battery-gauge-bq27441
by 
u-blox
Diff: bq27441.cpp
- Revision:
- 5:63b325f2c21a
- Parent:
- 3:ebd56471d57c
- Child:
- 6:998cc334f8f2
--- a/bq27441.cpp Wed Jun 07 10:32:54 2017 +0000
+++ b/bq27441.cpp Wed Jun 14 17:11:40 2017 +0100
@@ -137,7 +137,7 @@
if (offset / 32 == (offset + length - 1) / 32) {
#ifdef DEBUG_BQ27441
- printf("BatteryGaugeBq27441 (I2C 0x%02x): preparing to read %d byte(s) from offset %d of sub-class %d.\n", gAddress >> 1, length, offset, subClassId);
+ printf("BatteryGaugeBq27441 (I2C 0x%02x): preparing to read %d byte(s) from offset %d of sub-class %d.\n", gAddress >> 1, (int) length, (int) offset, subClassId);
#endif
// Handle unsealing
wasSealed = isSealed();
@@ -182,7 +182,7 @@
#endif
} else {
#ifdef DEBUG_BQ27441
- printf("BatteryGaugeBq27441 (I2C 0x%02x): couldn't read all %d bytes of config.\r", gAddress >> 1, length);
+ printf("BatteryGaugeBq27441 (I2C 0x%02x): couldn't read all %d bytes of config.\r", gAddress >> 1, (int) length);
#endif
}
} else {
@@ -217,7 +217,7 @@
}
} else {
#ifdef DEBUG_BQ27441
- printf("BatteryGaugeBq27441 (I2C 0x%02x): offset (%d) is in different 32 byte block to offset + length (%d) [length is %d].\n", gAddress >> 1, offset, offset + length, length);
+ printf("BatteryGaugeBq27441 (I2C 0x%02x): offset (%d) is in different 32 byte block to offset + length (%d) [length is %d].\n", gAddress >> 1, (int) offset, (int) (offset + length), (int) length);
#endif
}
}
@@ -250,7 +250,7 @@
// The offset + length combination must not cross a 32-byte boundary
if (offset / 32 == (offset + length - 1) / 32) {
#ifdef DEBUG_BQ27441
- printf("BatteryGaugeBq27441 (I2C 0x%02x): preparing to write %d byte(s) to offset %d of sub-class %d.\n", gAddress >> 1, length, offset, subClassId);
+ printf("BatteryGaugeBq27441 (I2C 0x%02x): preparing to write %d byte(s) to offset %d of sub-class %d.\n", gAddress >> 1, (int) length, (int) offset, subClassId);
#endif
// Handle unsealing
wasSealed = isSealed();
@@ -361,7 +361,7 @@
}
} else {
#ifdef DEBUG_BQ27441
- printf("BatteryGaugeBq27441 (I2C 0x%02x): couldn't write all %d bytes during config update.\n", gAddress >> 1, length);
+ printf("BatteryGaugeBq27441 (I2C 0x%02x): couldn't write all %d bytes during config update.\n", gAddress >> 1, (int) length);
#endif
}
} else {
@@ -406,7 +406,7 @@
}
} else {
#ifdef DEBUG_BQ27441
- printf("BatteryGaugeBq27441 (I2C 0x%02x): offset (%d) is in different 32 byte block to offset + length (%d) [length is %d].\n", gAddress >> 1, offset, offset + length, length);
+ printf("BatteryGaugeBq27441 (I2C 0x%02x): offset (%d) is in different 32 byte block to offset + length (%d) [length is %d].\n", gAddress >> 1, (int) offset, (int) (offset + length), (int) length);
#endif
}
}
@@ -736,6 +736,96 @@
return gGaugeOn;
}
+// Disable the battery detect pin.
+bool BatteryGaugeBq27441::disableBatteryDetect (void)
+{
+ bool success = false;
+ char data[3];
+
+ if (gReady && (gpI2c != NULL)) {
+ gpI2c->lock();
+ // Read the OpConfig register which is in the Registers sub-class
+ // (64) at offset 0.
+ if (readExtendedData(64, 0, 2, &(data[0]))) {
+#ifdef DEBUG_BQ27441
+ printf("BatteryGaugeBq27441 (I2C 0x%02x): OpConfig is 0x%02x%02x.\r\n", gAddress >> 1, data[0], data[1]);
+#endif
+ // Battery Insertion Enabled is bit 5 of the high byte of OpConfig.
+ // 1 means that the battery input pin is enabled
+ if (((data[0] & (1 << 5)) != 0)) {
+ // Clear the BIE bit 'cos it's set and is shouldn't be
+ data[0] &= ~(1 << 5);
+ // Write the new value back
+ if (writeExtendedData(64, 0, 2, &(data[0]))) {
+ // Send the Battery Inserted message as we can't do gauging otherwise
+ data[0] = 0x00; // Set address to first register for control
+ data[1] = 0x0C; // First byte of BAT_INSERT sub-command (0x0C)
+ data[2] = 0x00; // Second byte of BAT_INSERT sub-command (0x00)
+ success = gpI2c->write(gAddress, &(data[0]), 3) == 0;
+#ifdef DEBUG_BQ27441
+ if (success) {
+ printf("BatteryGaugeBq27441 (I2C 0x%02x): BIE disabled, BAT_INSERT sent, OpConfig becomes 0x%02x%02x.\r\n", gAddress >> 1, data[0], data[1]);
+ }
+#endif
+ }
+ } else {
+ success = true;
+ }
+ }
+
+ // Set hibernate again if we are not monitoring
+ if (!gGaugeOn) {
+ setHibernate();
+ }
+
+ gpI2c->unlock();
+ }
+
+ return success;
+}
+
+// Enable the battery detect pin.
+bool BatteryGaugeBq27441::enableBatteryDetect (void)
+{
+ bool success = false;
+ char data[3];
+
+ if (gReady && (gpI2c != NULL)) {
+ gpI2c->lock();
+ // Read the OpConfig register which is in the Registers sub-class
+ // (64) at offset 0.
+ if (readExtendedData(64, 0, 2, &(data[0]))) {
+#ifdef DEBUG_BQ27441
+ printf("BatteryGaugeBq27441 (I2C 0x%02x): OpConfig is 0x%02x%02x.\r\n", gAddress >> 1, data[0], data[1]);
+#endif
+ // Battery Insertion Enabled is bit 5 of the high byte of OpConfig.
+ // 1 means that the battery input pin is enabled
+ if (((data[0] & (1 << 5)) == 0)) {
+ // Set the BIE bit 'cos it's not set and needs to be
+ data[0] |= 1 << 5;
+ // Write the new value back
+ success = writeExtendedData(64, 0, 2, &(data[0]));
+#ifdef DEBUG_BQ27441
+ if (success) {
+ printf("BatteryGaugeBq27441 (I2C 0x%02x): BIE enabled, OpConfig becomes 0x%02x%02x.\r\n", gAddress >> 1, data[0], data[1]);
+ }
+#endif
+ } else {
+ success = true;
+ }
+ }
+
+ // Set hibernate again if we are not monitoring
+ if (!gGaugeOn) {
+ setHibernate();
+ }
+
+ gpI2c->unlock();
+ }
+
+ return success;
+}
+
// Check whether a battery has been detected or not.
bool BatteryGaugeBq27441::isBatteryDetected (void)
{
@@ -799,7 +889,7 @@
}
#ifdef DEBUG_BQ27441
- printf("BatteryGaugeBq27441 (I2C 0x%02x): chip temperature %.1f K, so %d C.\n", gAddress >> 1, ((float) data) / 10, temperatureC);
+ printf("BatteryGaugeBq27441 (I2C 0x%02x): chip temperature %.1f K, so %d C.\n", gAddress >> 1, ((float) data) / 10, (int) temperatureC);
#endif
}
@@ -871,7 +961,7 @@
}
#ifdef DEBUG_BQ27441
- printf("BatteryGaugeBq27441 (I2C 0x%02x): current %d mA.\n", gAddress >> 1, currentMA);
+ printf("BatteryGaugeBq27441 (I2C 0x%02x): current %d mA.\n", gAddress >> 1, (int) currentMA);
#endif
}
@@ -976,7 +1066,7 @@
success = readExtendedData(subClassId, offset, length, pData);
#ifdef DEBUG_BQ27441
if (success) {
- printf("BatteryGaugeBq27441 (I2C 0x%02x): read extended data with subClassId %d from offset %d.\n", gAddress >> 1, subClassId, offset);
+ printf("BatteryGaugeBq27441 (I2C 0x%02x): read extended data with subClassId %d from offset %d.\n", gAddress >> 1, subClassId, (int) offset);
}
#endif
@@ -1002,7 +1092,7 @@
success = writeExtendedData(subClassId, offset, length, pData);
#ifdef DEBUG_BQ27441
if (success) {
- printf("BatteryGaugeBq27441 (I2C 0x%02x): written %d byte(s) of extended data with subClassId %d from offset %d.\n", gAddress >> 1, length, subClassId, offset);
+ printf("BatteryGaugeBq27441 (I2C 0x%02x): written %d byte(s) of extended data with subClassId %d from offset %d.\n", gAddress >> 1, (int) length, subClassId, (int) offset);
}
#endif