mirror of
https://github.com/MarlinFirmware/Marlin.git
synced 2024-11-23 20:18:52 +00:00
f83d0f2a68
Added boards.h which contains defines for all the board numbers, plus some shorthand macros for less typing.
60 lines
1.6 KiB
C++
60 lines
1.6 KiB
C++
#include "Configuration.h"
|
|
|
|
#ifdef DIGIPOT_I2C
|
|
#include "Stream.h"
|
|
#include "utility/twi.h"
|
|
#include "Wire.h"
|
|
|
|
// Settings for the I2C based DIGIPOT (MCP4451) on Azteeg X3 Pro
|
|
#if MB(5DPRINT)
|
|
#define DIGIPOT_I2C_FACTOR 117.96
|
|
#define DIGIPOT_I2C_MAX_CURRENT 1.736
|
|
#else
|
|
#define DIGIPOT_I2C_FACTOR 106.7
|
|
#define DIGIPOT_I2C_MAX_CURRENT 2.5
|
|
#endif
|
|
|
|
static byte current_to_wiper( float current ){
|
|
return byte(ceil(float((DIGIPOT_I2C_FACTOR*current))));
|
|
}
|
|
|
|
static void i2c_send(byte addr, byte a, byte b)
|
|
{
|
|
Wire.beginTransmission(addr);
|
|
Wire.write(a);
|
|
Wire.write(b);
|
|
Wire.endTransmission();
|
|
}
|
|
|
|
// This is for the MCP4451 I2C based digipot
|
|
void digipot_i2c_set_current( int channel, float current )
|
|
{
|
|
current = min( (float) max( current, 0.0f ), DIGIPOT_I2C_MAX_CURRENT);
|
|
// these addresses are specific to Azteeg X3 Pro, can be set to others,
|
|
// In this case first digipot is at address A0=0, A1= 0, second one is at A0=0, A1= 1
|
|
byte addr= 0x2C; // channel 0-3
|
|
if(channel >= 4) {
|
|
addr= 0x2E; // channel 4-7
|
|
channel-= 4;
|
|
}
|
|
|
|
// Initial setup
|
|
i2c_send( addr, 0x40, 0xff );
|
|
i2c_send( addr, 0xA0, 0xff );
|
|
|
|
// Set actual wiper value
|
|
byte addresses[4] = { 0x00, 0x10, 0x60, 0x70 };
|
|
i2c_send( addr, addresses[channel], current_to_wiper(current) );
|
|
}
|
|
|
|
void digipot_i2c_init()
|
|
{
|
|
const float digipot_motor_current[] = DIGIPOT_I2C_MOTOR_CURRENTS;
|
|
Wire.begin();
|
|
// setup initial currents as defined in Configuration_adv.h
|
|
for(int i=0;i<=sizeof(digipot_motor_current)/sizeof(float);i++) {
|
|
digipot_i2c_set_current(i, digipot_motor_current[i]);
|
|
}
|
|
}
|
|
#endif
|