diff options
Diffstat (limited to 'src/drivers/mpu6000/mpu6000.cpp')
| -rw-r--r-- | src/drivers/mpu6000/mpu6000.cpp | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/src/drivers/mpu6000/mpu6000.cpp b/src/drivers/mpu6000/mpu6000.cpp index c95d11c83..bbc595af4 100644 --- a/src/drivers/mpu6000/mpu6000.cpp +++ b/src/drivers/mpu6000/mpu6000.cpp @@ -170,7 +170,7 @@ SPI speed */ #define MPU6000_LOW_BUS_SPEED 1000*1000 -#define MPU6000_HIGH_BUS_SPEED 10*1000*1000 +#define MPU6000_HIGH_BUS_SPEED 11*1000*1000 /* will be rounded to 10.4 MHz, within margins for MPU6K */ class MPU6000_gyro; @@ -505,17 +505,26 @@ out: void MPU6000::reset() { + // if the mpu6000 is initialised after the l3gd20 and lsm303d + // then if we don't do an irqsave/irqrestore here the mpu6000 + // frequenctly comes up in a bad state where all transfers + // come as zero + irqstate_t state; + state = irqsave(); - // Chip reset write_reg(MPUREG_PWR_MGMT_1, BIT_H_RESET); up_udelay(10000); - // Wake up device and select GyroZ clock (better performance) + // Wake up device and select GyroZ clock. Note that the + // MPU6000 starts up in sleep mode, and it can take some time + // for it to come out of sleep write_reg(MPUREG_PWR_MGMT_1, MPU_CLK_SEL_PLLGYROZ); up_udelay(1000); // Disable I2C bus (recommended on datasheet) write_reg(MPUREG_USER_CTRL, BIT_I2C_IF_DIS); + irqrestore(state); + up_udelay(1000); // SAMPLE RATE |