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different approach to Polplu board and UNUSED_PIN=127

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This commit is contained in:
Harald Barth 2020-10-31 22:45:06 +01:00
parent 6f68adbfe9
commit 34f3abedaf
2 changed files with 20 additions and 6 deletions
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6
MotorDriver.h
View File

@ -20,6 +20,10 @@
#define MotorDriver_h
// Virtualised Motor shield 1-track hardware Interface
#ifndef UNUSED_PIN // sync define with the one in MotorDrivers.h
#define UNUSED_PIN 127 // inside int8_t
#endif
class MotorDriver {
public:
MotorDriver(byte power_pin, byte signal_pin, byte signal_pin2, int8_t brake_pin, byte current_pin, float senseFactor, unsigned int tripMilliamps, byte faultPin);
@ -39,7 +43,5 @@ class MotorDriver {
float senseFactor;
unsigned int tripMilliamps;
int rawCurrentTripValue;
const byte UNUSED_PIN = 255;
};
#endif

20
MotorDrivers.h
View File

@ -13,7 +13,9 @@
// similar to those defined here, WITHOUT editing this file. You can put your
// custom defines in config.h.
const byte UNUSED_PIN = 255;
#ifndef UNUSED_PIN // sync define with the one in MotorDriver.h
#define UNUSED_PIN 127 // inside int8_t
#endif
// MotorDriver(byte power_pin, byte signal_pin, byte signal_pin2, int8_t brake_pin, byte current_pin,
// float senseFactor, unsigned int tripMilliamps, byte faultPin);
@ -28,9 +30,19 @@ const byte UNUSED_PIN = 255;
new MotorDriver(11, 13, UNUSED_PIN, UNUSED_PIN, A1, 2.99, 2000, UNUSED_PIN)
// Pololu Motor Shield
#define POLOLU_MOTOR_SHIELD F("POLOLU_MOTOR_SHIELD"), \
new MotorDriver(4, 7, UNUSED_PIN, -9, A0, 18, 3000, 12), \
new MotorDriver(2, 8, UNUSED_PIN, -10, A1, 18, 3000, UNUSED_PIN)
#define POLOLU_MOTOR_SHIELD F("POLOLU_MOTOR_SHIELD"), \
new MotorDriver( 9, 7, UNUSED_PIN, -4, A0, 18, 3000, 12), \
new MotorDriver(10, 8, UNUSED_PIN, UNUSED_PIN, A1, 18, 3000, UNUSED_PIN)
//
// Actually, on the Pololu MC33926 shield the enable lines are tied together on pin 4 and the
// pins 9 and 10 work as "inverted brake" but as we turn on and off the tracks individually
// via the power pins we above use 9 and 10 as power pins and 4 as "inverted brake" which in this
// version of the code always will be high. That means this config is not usable for generating
// a railcom cuotout in the future. For that one must wire the second ^D2 to pin 2 and define
// the motor driver like this:
// new MotorDriver(4, 7, UNUSED_PIN, -9, A0, 18, 3000, 12)
// new MotorDriver(2, 8, UNUSED_PIN, -10, A1, 18, 3000, UNUSED_PIN)
// See Pololu dial_mc33926_shield_schematic.pdf and truth table on page 17 of the MC33926 data sheet.
// Firebox Mk1
#define FIREBOX_MK1 F("FIREBOX_MK1"), \