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Implement digipots for MKS SBASE (#9927)

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Fix #9477
This commit is contained in:
Scott Lahteine 2018-03-04 15:14:47 -06:00 committed by GitHub
parent 07ae23fe14
commit beeed580b8
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GPG Key ID: 4AEE18F83AFDEB23
3 changed files with 95 additions and 49 deletions
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51
Marlin/src/HAL/HAL_LPC1768/digipot_mcp4451_I2C_routines.c → Marlin/src/HAL/HAL_LPC1768/include/digipot_mcp4451_I2C_routines.c
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@ -23,18 +23,16 @@
// adapted from I2C/master/master.c example
// https://www-users.cs.york.ac.uk/~pcc/MCP/HAPR-Course-web/CMSIS/examples/html/master_8c_source.html
#ifdef TARGET_LPC1768
#include "../../../inc/MarlinConfigPre.h"
#if MB(MKS_SBASE)
#include "digipot_mcp4451_I2C_routines.h"
#ifdef __cplusplus
extern "C" {
#endif
#include <lpc17xx_i2c.h>
#include <lpc17xx_pinsel.h>
#include <lpc17xx_libcfg_default.h>
//////////////////////////////////////////////////////////////////////////////////////
// These two routines are exact copies of the lpc17xx_i2c.c routines. Couldn't link to
// to the lpc17xx_i2c.c routines so had to copy them into this file & rename them.
@ -52,7 +50,7 @@ static uint32_t _I2C_Start (LPC_I2C_TypeDef *I2Cx) {
}
static void _I2C_Stop(LPC_I2C_TypeDef *I2Cx) {
/* Make sure start bit is not active */
// Make sure start bit is not active
if (I2Cx->I2CONSET & I2C_I2CONSET_STA)
I2Cx->I2CONCLR = I2C_I2CONCLR_STAC;
@ -60,29 +58,11 @@ static void _I2C_Stop (LPC_I2C_TypeDef *I2Cx) {
I2Cx->I2CONCLR = I2C_I2CONCLR_SIC;
}
//////////////////////////////////////////////////////////////////////////////////////
#define USEDI2CDEV_M 1 // use I2C1 controller
#if (USEDI2CDEV_M == 0)
#define I2CDEV_M LPC_I2C0
#elif (USEDI2CDEV_M == 1)
#define I2CDEV_M LPC_I2C1
#elif (USEDI2CDEV_M == 2)
#define I2CDEV_M LPC_I2C2
#else
#error "Master I2C device not defined!"
#endif
PINSEL_CFG_Type PinCfg;
I2C_M_SETUP_Type transferMCfg;
#define I2C_status (LPC_I2C1->I2STAT & I2C_STAT_CODE_BITMASK)
uint8_t digipot_mcp4451_start(uint8_t sla) { // send slave address and write bit
// Sometimes TX data ACK or NAK status is returned. That mean the start state didn't
// happen which means only the value of the slave address was send. Keep looping until
@ -102,36 +82,32 @@ uint8_t digipot_mcp4451_start(uint8_t sla) { // send slave address and write bi
while ((I2C_status != I2C_I2STAT_M_TX_SLAW_ACK)
&& (I2C_status != I2C_I2STAT_M_TX_SLAW_NACK)
&& (I2C_status != I2C_I2STAT_M_TX_DAT_ACK)
&& (I2C_status != I2C_I2STAT_M_TX_DAT_NACK)); //wait for slaw to finish
&& (I2C_status != I2C_I2STAT_M_TX_DAT_NACK)) { /* wait for slaw to finish */ }
} while ( (I2C_status == I2C_I2STAT_M_TX_DAT_ACK) || (I2C_status == I2C_I2STAT_M_TX_DAT_NACK));
return 1;
}
void digipot_mcp4451_init(void) {
/**
* Init I2C pin connect
*/
PinCfg.OpenDrain = 0;
PinCfg.Pinmode = 0;
#if ((USEDI2CDEV_M == 0))
#if USEDI2CDEV_M == 0
PinCfg.Funcnum = 1;
PinCfg.Pinnum = 27;
PinCfg.Portnum = 0;
PINSEL_ConfigPin(&PinCfg); // SDA0 / D57 AUX-1
PinCfg.Pinnum = 28;
PINSEL_ConfigPin(&PinCfg); // SCL0 / D58 AUX-1
#endif
#if ((USEDI2CDEV_M == 1))
#elif USEDI2CDEV_M == 1
PinCfg.Funcnum = 3;
PinCfg.Pinnum = 0;
PinCfg.Portnum = 0;
PINSEL_ConfigPin(&PinCfg); // SDA1 / D20 SCA
PinCfg.Pinnum = 1;
PINSEL_ConfigPin(&PinCfg); // SCL1 / D21 SCL
#endif
#if ((USEDI2CDEV_M == 2))
#elif USEDI2CDEV_M == 2
PinCfg.Funcnum = 2;
PinCfg.Pinnum = 10;
PinCfg.Portnum = 0;
@ -142,16 +118,15 @@ void digipot_mcp4451_init(void) {
// Initialize I2C peripheral
I2C_Init(I2CDEV_M, 400000); // hardwired to 400KHz bit rate, 100KHz is the other option
/* Enable Master I2C operation */
// Enable Master I2C operation
I2C_Cmd(I2CDEV_M, I2C_MASTER_MODE, ENABLE);
}
uint8_t digipot_mcp4451_send_byte(uint8_t data) {
LPC_I2C1->I2DAT = data & I2C_I2DAT_BITMASK; // transmit data
LPC_I2C1->I2CONSET = I2C_I2CONSET_AA;
LPC_I2C1->I2CONCLR = I2C_I2CONCLR_SIC;
while ((I2C_status != I2C_I2STAT_M_TX_DAT_ACK) && (I2C_status != I2C_I2STAT_M_TX_DAT_NACK)); // wait for xmit to finish
while (I2C_status != I2C_I2STAT_M_TX_DAT_ACK && I2C_status != I2C_I2STAT_M_TX_DAT_NACK); // wait for xmit to finish
return 1;
}
@ -159,4 +134,4 @@ uint8_t digipot_mcp4451_send_byte(uint8_t data) {
}
#endif
#endif // TARGET_LPC1768
#endif // MB(MKS_SBASE)

57
Marlin/src/HAL/HAL_LPC1768/include/digipot_mcp4451_I2C_routines.h Normal file
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@ -0,0 +1,57 @@
/**
* Marlin 3D Printer Firmware
* Copyright (C) 2016, 2017 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
*
* Based on Sprinter and grbl.
* Copyright (C) 2011 Camiel Gubbels / Erik van der Zalm
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
// adapted from I2C/master/master.c example
// https://www-users.cs.york.ac.uk/~pcc/MCP/HAPR-Course-web/CMSIS/examples/html/master_8c_source.html
#ifndef _DIGIPOT_MCP4451_I2C_ROUTINES_H_
#define _DIGIPOT_MCP4451_I2C_ROUTINES_H_
#define USEDI2CDEV_M 1 // use I2C1 controller
#if USEDI2CDEV_M == 0
#define I2CDEV_M LPC_I2C0
#elif USEDI2CDEV_M == 1
#define I2CDEV_M LPC_I2C1
#elif USEDI2CDEV_M == 2
#define I2CDEV_M LPC_I2C2
#else
#error "Master I2C device not defined!"
#endif
#ifdef __cplusplus
extern "C" {
#endif
#include <lpc17xx_i2c.h>
#include <lpc17xx_pinsel.h>
#include <lpc17xx_libcfg_default.h>
uint8_t digipot_mcp4451_start(uint8_t sla);
void digipot_mcp4451_init(void);
uint8_t digipot_mcp4451_send_byte(uint8_t data);
#ifdef __cplusplus
}
#endif
#endif // _DIGIPOT_MCP4451_I2C_ROUTINES_H_

16
Marlin/src/feature/digipot/digipot_mcp4451.cpp
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@ -27,6 +27,10 @@
#include "Stream.h"
#include <Wire.h>
#if MB(MKS_SBASE)
#include "digipot_mcp4451_I2C_routines.h"
#endif
// Settings for the I2C based DIGIPOT (MCP4451) on Azteeg X3 Pro
#if MB(5DPRINT)
#define DIGIPOT_I2C_FACTOR 117.96
@ -41,10 +45,16 @@ static byte current_to_wiper(const float current) {
}
static void i2c_send(const byte addr, const byte a, const byte b) {
#if MB(MKS_SBASE)
digipot_mcp4451_start(addr);
digipot_mcp4451_send_byte(a);
digipot_mcp4451_send_byte(b);
#else
Wire.beginTransmission(addr);
Wire.write(a);
Wire.write(b);
Wire.endTransmission();
#endif
}
// This is for the MCP4451 I2C based digipot
@ -63,9 +73,13 @@ void digipot_i2c_set_current(const uint8_t channel, const float current) {
}
void digipot_i2c_init() {
static const float digipot_motor_current[] PROGMEM = DIGIPOT_I2C_MOTOR_CURRENTS;
#if MB(MKS_SBASE)
digipot_mcp4451_init();
#else
Wire.begin();
#endif
// setup initial currents as defined in Configuration_adv.h
static const float digipot_motor_current[] PROGMEM = DIGIPOT_I2C_MOTOR_CURRENTS;
for (uint8_t i = 0; i < COUNT(digipot_motor_current); i++)
digipot_i2c_set_current(i, pgm_read_float(&digipot_motor_current[i]));
}