diff options
Diffstat (limited to 'src/drivers/lsm303d/lsm303d.cpp')
| -rw-r--r-- | src/drivers/lsm303d/lsm303d.cpp | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/src/drivers/lsm303d/lsm303d.cpp b/src/drivers/lsm303d/lsm303d.cpp index bfa129364..da981989c 100644 --- a/src/drivers/lsm303d/lsm303d.cpp +++ b/src/drivers/lsm303d/lsm303d.cpp @@ -323,6 +323,11 @@ private: void reset(); /** + * disable I2C on the chip + */ + void disable_i2c(); + + /** * Static trampoline from the hrt_call context; because we don't have a * generic hrt wrapper yet. * @@ -596,8 +601,24 @@ out: } void +LSM303D::disable_i2c(void) +{ + uint8_t a = read_reg(0x02); + write_reg(0x02, (0x10 | a)); + a = read_reg(0x02); + write_reg(0x02, (0xF7 & a)); + a = read_reg(0x15); + write_reg(0x15, (0x80 | a)); + a = read_reg(0x02); + write_reg(0x02, (0xE7 & a)); +} + +void LSM303D::reset() { + // ensure the chip doesn't interpret any other bus traffic as I2C + disable_i2c(); + /* enable accel*/ _reg1_expected = REG1_X_ENABLE_A | REG1_Y_ENABLE_A | REG1_Z_ENABLE_A | REG1_BDU_UPDATE | REG1_RATE_800HZ_A; write_reg(ADDR_CTRL_REG1, _reg1_expected); |