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✨ Add M3426 A<addr> parameter (#24130)

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Co-authored-by: Scott Lahteine <github@thinkyhead.com>
This commit is contained in:
Stephen Hawes 2022-05-05 03:37:47 -04:00 committed by Scott Lahteine
parent 54e543872b
commit 995221e68e
3 changed files with 14 additions and 12 deletions
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6
Marlin/src/feature/adc/adc_mcp3426.cpp
View file

@ -34,7 +34,7 @@
#include "adc_mcp3426.h"
// Read the ADC value from MCP342X on a specific channel
int16_t MCP3426::ReadValue(uint8_t channel, uint8_t gain) {
int16_t MCP3426::ReadValue(uint8_t channel, uint8_t gain, uint8_t address) {
Error = false;
#if PINS_EXIST(I2C_SCL, I2C_SDA) && DISABLED(SOFT_I2C_EEPROM)
@ -44,7 +44,7 @@ int16_t MCP3426::ReadValue(uint8_t channel, uint8_t gain) {
Wire.begin(); // No address joins the BUS as the master
Wire.beginTransmission(I2C_ADDRESS(MCP342X_ADC_I2C_ADDRESS));
Wire.beginTransmission(I2C_ADDRESS(address));
// Continuous Conversion Mode, 16 bit, Channel 1, Gain x4
// 26 = 0b00011000
@ -75,7 +75,7 @@ int16_t MCP3426::ReadValue(uint8_t channel, uint8_t gain) {
uint8_t buffer[len] = {};
do {
Wire.requestFrom(I2C_ADDRESS(MCP342X_ADC_I2C_ADDRESS), len);
Wire.requestFrom(I2C_ADDRESS(address), len);
if (Wire.available() != len) {
Error = true;
return 0;

5
Marlin/src/feature/adc/adc_mcp3426.h
View file

@ -29,12 +29,9 @@
#include <stdint.h>
#include <Wire.h>
// Address of MCP342X chip
#define MCP342X_ADC_I2C_ADDRESS 104
class MCP3426 {
public:
int16_t ReadValue(uint8_t channel, uint8_t gain);
int16_t ReadValue(uint8_t channel, uint8_t gain, uint8_t address);
bool Error;
};

15
Marlin/src/gcode/feature/adc/M3426.cpp
View file

@ -28,6 +28,8 @@
#include "../../../feature/adc/adc_mcp3426.h"
#define MCP3426_BASE_ADDR (0b1101 << 3)
/**
* M3426: Read 16 bit (signed) value from I2C MCP3426 ADC device
*
@ -36,12 +38,15 @@
* M3426 I<byte-2 value in base 10> 0 or 1, invert reply
*/
void GcodeSuite::M3426() {
uint8_t channel = parser.byteval('C', 1), // Select the channel 1 or 2
gain = parser.byteval('G', 1);
const bool inverted = parser.byteval('I') == 1;
uint8_t channel = parser.byteval('C', 1), // Channel 1 or 2
gain = parser.byteval('G', 1), // Gain 1, 2, 4, or 8
address = parser.byteval('A', 3); // Address 0-7 (or 104-111)
const bool inverted = parser.boolval('I');
if (channel <= 2 && (gain == 1 || gain == 2 || gain == 4 || gain == 8)) {
int16_t result = mcp3426.ReadValue(channel, gain);
if (address <= 7) address += MCP3426_BASE_ADDR;
if (WITHIN(channel, 1, 2) && (gain == 1 || gain == 2 || gain == 4 || gain == 8) && WITHIN(address, MCP3426_BASE_ADDR, MCP3426_BASE_ADDR + 7)) {
int16_t result = mcp3426.ReadValue(channel, gain, address);
if (mcp3426.Error == false) {
if (inverted) {