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DAC patches

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As suggested by #4985
This commit is contained in:
Scott Lahteine
2016-10-10 14:08:04 -05:00
parent 149b8d9e4b
commit e17f9b8b99
3 changed files with 14 additions and 9 deletions
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14
Marlin/dac_mcp4728.cpp
View File

@@ -60,6 +60,7 @@ uint8_t mcp4728_analogWrite(uint8_t channel, uint16_t value) {
mcp4728_values[channel] = value; mcp4728_values[channel] = value;
return mcp4728_fastWrite(); return mcp4728_fastWrite();
} }
/** /**
* Write all input resistor values to EEPROM using SequencialWrite method. * Write all input resistor values to EEPROM using SequencialWrite method.
* This will update both input register and EEPROM value * This will update both input register and EEPROM value
@@ -68,7 +69,7 @@ uint8_t mcp4728_analogWrite(uint8_t channel, uint16_t value) {
uint8_t mcp4728_eepromWrite() { uint8_t mcp4728_eepromWrite() {
Wire.beginTransmission(DAC_DEV_ADDRESS); Wire.beginTransmission(DAC_DEV_ADDRESS);
Wire.write(SEQWRITE); Wire.write(SEQWRITE);
for (uint8_t channel = 0; channel < COUNT(channel); channel++) { for (uint8_t channel = 0; channel < COUNT(mcp4728_values); channel++) {
Wire.write(DAC_STEPPER_VREF << 7 | DAC_STEPPER_GAIN << 4 | highByte(mcp4728_values[channel])); Wire.write(DAC_STEPPER_VREF << 7 | DAC_STEPPER_GAIN << 4 | highByte(mcp4728_values[channel]));
Wire.write(lowByte(mcp4728_values[channel])); Wire.write(lowByte(mcp4728_values[channel]));
} }
@@ -109,10 +110,15 @@ uint16_t mcp4728_getVout(uint8_t channel) {
} }
*/ */
/* Returns DAC values as a 0-100 percentage of drive strength */ /**
* Returns DAC values as a 0-100 percentage of drive strength
*/
uint16_t mcp4728_getDrvPct(uint8_t channel) { return uint16_t(100.0 * mcp4728_values[channel] / (DAC_STEPPER_MAX) + 0.5); } uint16_t mcp4728_getDrvPct(uint8_t channel) { return uint16_t(100.0 * mcp4728_values[channel] / (DAC_STEPPER_MAX) + 0.5); }
/* Recieves all Drive strengths as 0-100 percent values, updates DAC Values array and calls fastwrite to update the DAC */ /**
* Receives all Drive strengths as 0-100 percent values, updates
* DAC Values array and calls fastwrite to update the DAC.
*/
void mcp4728_setDrvPct(int16_t pct[XYZE]) { void mcp4728_setDrvPct(int16_t pct[XYZE]) {
LOOP_XYZE(i) mcp4728_values[i] = 0.01 * pct[i] * (DAC_STEPPER_MAX); LOOP_XYZE(i) mcp4728_values[i] = 0.01 * pct[i] * (DAC_STEPPER_MAX);
mcp4728_fastWrite(); mcp4728_fastWrite();
@@ -125,7 +131,7 @@ void mcp4728_setDrvPct(int16_t pct[XYZE]) {
*/ */
uint8_t mcp4728_fastWrite() { uint8_t mcp4728_fastWrite() {
Wire.beginTransmission(DAC_DEV_ADDRESS); Wire.beginTransmission(DAC_DEV_ADDRESS);
for (uint8_t channel = 0; channel < COUNT(channel); channel++) { for (uint8_t channel = 0; channel < COUNT(mcp4728_values); channel++) {
Wire.write(highByte(mcp4728_values[channel])); Wire.write(highByte(mcp4728_values[channel]));
Wire.write(lowByte(mcp4728_values[channel])); Wire.write(lowByte(mcp4728_values[channel]));
} }

7
Marlin/dac_mcp4728.h
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@@ -24,8 +24,8 @@
* Arduino library for MicroChip MCP4728 I2C D/A converter. * Arduino library for MicroChip MCP4728 I2C D/A converter.
*/ */
#ifndef mcp4728_h #ifndef DAC_MCP4728_H
#define mcp4728_h #define DAC_MCP4728_H
#include "MarlinConfig.h" #include "MarlinConfig.h"
@@ -63,5 +63,4 @@ uint16_t mcp4728_getDrvPct(uint8_t channel);
void mcp4728_setDrvPct(int16_t pct[XYZE]); void mcp4728_setDrvPct(int16_t pct[XYZE]);
#endif #endif
#endif #endif // DAC_MCP4728_H

2
Marlin/stepper_dac.cpp
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@@ -87,7 +87,7 @@
} }
static float dac_perc(int8_t n) { return 100.0 * mcp4728_getValue(dac_order[n]) * (1.0 / (DAC_STEPPER_MAX)); } static float dac_perc(int8_t n) { return 100.0 * mcp4728_getValue(dac_order[n]) * (1.0 / (DAC_STEPPER_MAX)); }
static float dac_amps(int8_t n) { return mcp4728_getDrvPct(dac_order[n]) * (DAC_STEPPER_MAX) * (0.125 * (DAC_STEPPER_SENSE)); } static float dac_amps(int8_t n) { return mcp4728_getDrvPct(dac_order[n]) * (DAC_STEPPER_MAX) * 0.125 * (1.0 / (DAC_STEPPER_SENSE)); }
int16_t dac_current_get_percent(AxisEnum axis) { return mcp4728_getDrvPct(dac_order[axis]); } int16_t dac_current_get_percent(AxisEnum axis) { return mcp4728_getDrvPct(dac_order[axis]); }
void dac_current_set_percents(int16_t pct[XYZE]) { void dac_current_set_percents(int16_t pct[XYZE]) {