Implemented first Hangar-Service
Dependencies: CalibrateMagneto QuaternionMath
Fork of SML2 by
MotorDriver.cpp@12:1632d7391453, 2015-03-13 (annotated)
- Committer:
- pvaibhav
- Date:
- Fri Mar 13 09:12:56 2015 +0000
- Revision:
- 12:1632d7391453
- Parent:
- 4:e759b8c756da
- Child:
- 18:f51b1a94a6e2
Code reformatting
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
pvaibhav | 0:943820483318 | 1 | #include "MotorDriver.h" |
pvaibhav | 0:943820483318 | 2 | #include <cassert> |
pvaibhav | 0:943820483318 | 3 | #include <cmath> |
pvaibhav | 4:e759b8c756da | 4 | #define DEBUG "Motor" |
pvaibhav | 4:e759b8c756da | 5 | #include "Logger.h" |
pvaibhav | 0:943820483318 | 6 | |
pvaibhav | 12:1632d7391453 | 7 | MotorDriver::MotorDriver(I2C &i2c, const uint8_t address) : I2CPeripheral(i2c, address) |
pvaibhav | 12:1632d7391453 | 8 | { |
pvaibhav | 4:e759b8c756da | 9 | INFO("Motor driver at addr=%#x ready", address); |
pvaibhav | 4:e759b8c756da | 10 | } |
pvaibhav | 0:943820483318 | 11 | |
pvaibhav | 12:1632d7391453 | 12 | void MotorDriver::setVoltage(const float voltage) |
pvaibhav | 12:1632d7391453 | 13 | { |
pvaibhav | 0:943820483318 | 14 | assert(abs(voltage) <= 5.06); |
pvaibhav | 12:1632d7391453 | 15 | |
pvaibhav | 3:ee90a9ada112 | 16 | const bool stop = fabs(voltage) < 0.48; |
pvaibhav | 3:ee90a9ada112 | 17 | const float Vr = 1.285; // internal reference voltage |
pvaibhav | 12:1632d7391453 | 18 | |
pvaibhav | 3:ee90a9ada112 | 19 | if (stop) { |
pvaibhav | 3:ee90a9ada112 | 20 | write_reg(0x00, 0x03); // last 2 bits = 11 = "brake" |
pvaibhav | 3:ee90a9ada112 | 21 | } else { |
pvaibhav | 3:ee90a9ada112 | 22 | const uint8_t DAC_val = ceil( (16.0 * fabs(voltage) / Vr) - 1.0 ); // derived from table on DRV8830 datasheet page 10 |
pvaibhav | 3:ee90a9ada112 | 23 | const uint8_t direction = (voltage > 0.0) ? 0x01 : 0x02; // forward or reverse is set through last 2 bits |
pvaibhav | 3:ee90a9ada112 | 24 | write_reg(0x00, (DAC_val << 2) | direction); |
pvaibhav | 3:ee90a9ada112 | 25 | } |
pvaibhav | 0:943820483318 | 26 | } |
pvaibhav | 0:943820483318 | 27 | |
pvaibhav | 12:1632d7391453 | 28 | MotorDriver& MotorDriver::operator=(const float voltage) |
pvaibhav | 12:1632d7391453 | 29 | { |
pvaibhav | 0:943820483318 | 30 | setVoltage(voltage); |
pvaibhav | 0:943820483318 | 31 | return *this; |
pvaibhav | 0:943820483318 | 32 | } |