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LPC1768: Allow I2C master channel override (#16584)

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This commit is contained in:
0r31 2020-01-20 06:59:06 +01:00 committed by Scott Lahteine
parent 0fcf2b1110
commit 451062553e
9 changed files with 142 additions and 378 deletions
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47
Marlin/src/HAL/HAL_LPC1768/include/digipot_mcp4451_I2C_routines.c
View file

@ -20,8 +20,10 @@
*
*/
// 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
/**
* digipot_mcp4451_I2C_routines.c
* Adapted from https://www-users.cs.york.ac.uk/~pcc/MCP/HAPR-Course-web/CMSIS/examples/html/master_8c_source.html
*/
#ifdef TARGET_LPC1768
@ -29,12 +31,13 @@
#if MB(MKS_SBASE)
#include "digipot_mcp4451_I2C_routines.h"
#ifdef __cplusplus
extern "C" {
#endif
#include "digipot_mcp4451_I2C_routines.h"
#include "i2c_util.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.
@ -60,7 +63,6 @@ static void _I2C_Stop(LPC_I2C_TypeDef *I2Cx) {
I2Cx->I2CONCLR = I2C_I2CONCLR_SIC;
}
PINSEL_CFG_Type PinCfg;
I2C_M_SETUP_Type transferMCfg;
#define I2C_status (LPC_I2C1->I2STAT & I2C_STAT_CODE_BITMASK)
@ -89,41 +91,6 @@ uint8_t digipot_mcp4451_start(uint8_t sla) { // send slave address and write bi
return 1;
}
void digipot_mcp4451_init() {
/**
* Init I2C pin connect
*/
PinCfg.OpenDrain = 0;
PinCfg.Pinmode = 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
#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
#elif USEDI2CDEV_M == 2
PinCfg.Funcnum = 2;
PinCfg.Pinnum = 10;
PinCfg.Portnum = 0;
PINSEL_ConfigPin(&PinCfg); // SDA2 / D38 X_ENABLE_PIN
PinCfg.Pinnum = 11;
PINSEL_ConfigPin(&PinCfg); // SCL2 / D55 X_DIR_PIN
#endif
// Initialize I2C peripheral
I2C_Init(I2CDEV_M, 400000); // hardwired to 400KHz bit rate, 100KHz is the other option
// 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;

19
Marlin/src/HAL/HAL_LPC1768/include/digipot_mcp4451_I2C_routines.h
View file

@ -21,20 +21,10 @@
*/
#pragma once
// 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
#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
/**
* digipot_mcp4451_I2C_routines.h
* Adapted from https://www-users.cs.york.ac.uk/~pcc/MCP/HAPR-Course-web/CMSIS/examples/html/master_8c_source.html
*/
#ifdef __cplusplus
extern "C" {
@ -45,7 +35,6 @@
#include <lpc17xx_libcfg_default.h>
uint8_t digipot_mcp4451_start(uint8_t sla);
void digipot_mcp4451_init();
uint8_t digipot_mcp4451_send_byte(uint8_t data);
#ifdef __cplusplus

71
Marlin/src/HAL/HAL_LPC1768/include/i2c_util.c Normal file
View file

@ -0,0 +1,71 @@
/**
* Marlin 3D Printer Firmware
* Copyright (c) 2019 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/>.
*
*/
/**
* HAL_LPC1768/include/i2c_util.c
*/
#ifdef TARGET_LPC1768
#include "../../../inc/MarlinConfigPre.h"
#include "i2c_util.h"
#define U8G_I2C_OPT_FAST 16 // from u8g.h
#ifdef __cplusplus
extern "C" {
#endif
void configure_i2c(const uint8_t clock_option) {
/**
* Init I2C pin connect
*/
PINSEL_CFG_Type PinCfg;
PinCfg.OpenDrain = 0;
PinCfg.Pinmode = 0;
PinCfg.Portnum = 0;
#if USEDI2CDEV_M == 0
PinCfg.Funcnum = 1;
PinCfg.Pinnum = 27; // SDA0 / D57 AUX-1 ... SCL0 / D58 AUX-1
#elif USEDI2CDEV_M == 1
PinCfg.Funcnum = 3;
PinCfg.Pinnum = 0; // SDA1 / D20 SCA ... SCL1 / D21 SCL
#elif USEDI2CDEV_M == 2
PinCfg.Funcnum = 2;
PinCfg.Pinnum = 10; // SDA2 / D38 X_ENABLE_PIN ... SCL2 / D55 X_DIR_PIN
#endif
PINSEL_ConfigPin(&PinCfg);
PinCfg.Pinnum += 1;
PINSEL_ConfigPin(&PinCfg);
// Initialize I2C peripheral
I2C_Init(I2CDEV_M, (clock_option & U8G_I2C_OPT_FAST) ? 400000: 100000); // LCD data rates
// Enable Master I2C operation
I2C_Cmd(I2CDEV_M, I2C_MASTER_MODE, ENABLE);
}
#ifdef __cplusplus
}
#endif
#endif // TARGET_LPC1768

46
Marlin/src/HAL/HAL_LPC1768/include/i2c_util.h Normal file
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@ -0,0 +1,46 @@
/**
* Marlin 3D Printer Firmware
* Copyright (c) 2019 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/>.
*
*/
#pragma once
/**
* HAL_LPC1768/include/i2c_util.h
*/
#ifndef USEDI2CDEV_M
#define USEDI2CDEV_M 1 // By default use I2C1 controller
#endif
#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
#include <lpc17xx_i2c.h>
#include <lpc17xx_pinsel.h>
#include <lpc17xx_libcfg_default.h>
void configure_i2c(const uint8_t clock_option);

65
Marlin/src/HAL/HAL_LPC1768/u8g/LCD_I2C_routines.cpp
View file

@ -31,13 +31,9 @@ extern int millis();
extern "C" {
#endif
#include <lpc17xx_i2c.h>
#include <lpc17xx_pinsel.h>
#include <lpc17xx_libcfg_default.h>
#include "../include/i2c_util.h"
#include "../../../core/millis_t.h"
//////////////////////////////////////////////////////////////////////////////////////
// These two routines are exact copies of the lpc17xx_i2c.c routines. Couldn't link to
@ -67,30 +63,16 @@ static void _I2C_Stop (LPC_I2C_TypeDef *I2Cx) {
//////////////////////////////////////////////////////////////////////////////////////
#define U8G_I2C_OPT_FAST 16 // from u8g.h
#define USEDI2CDEV_M 1
#define I2CDEV_S_ADDR 0x78 // from SSD1306 //actual address is 0x3C - shift left 1 with LSB set to 0 to indicate write
#define BUFFER_SIZE 0x1 // only do single byte transfers with LCDs
#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 u8g_i2c_start(uint8_t sla) { // send slave address and write bit
// Send slave address and write bit
uint8_t u8g_i2c_start(const uint8_t sla) {
// 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
// the slave address and write bit are actually sent.
@ -114,44 +96,9 @@ uint8_t u8g_i2c_start(uint8_t sla) { // send slave address and write bit
return 1;
}
void u8g_i2c_init(uint8_t clock_option) {
/**
* Init I2C pin connect
*/
PinCfg.OpenDrain = 0;
PinCfg.Pinmode = 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))
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))
PinCfg.Funcnum = 2;
PinCfg.Pinnum = 10;
PinCfg.Portnum = 0;
PINSEL_ConfigPin(&PinCfg); // SDA2 / D38 X_ENABLE_PIN
PinCfg.Pinnum = 11;
PINSEL_ConfigPin(&PinCfg); // SCL2 / D55 X_DIR_PIN
#endif
// Initialize I2C peripheral
I2C_Init(I2CDEV_M, (clock_option & U8G_I2C_OPT_FAST) ? 400000: 100000); // LCD data rates
// Enable Master I2C operation
I2C_Cmd(I2CDEV_M, I2C_MASTER_MODE, ENABLE);
u8g_i2c_start(0); // send slave address and write bit
void u8g_i2c_init(const uint8_t clock_option) {
configure_i2c(clock_option);
u8g_i2c_start(0); // Send slave address and write bit
}
uint8_t u8g_i2c_send_byte(uint8_t data) {

4
Marlin/src/HAL/HAL_LPC1768/u8g/LCD_I2C_routines.h
View file

@ -21,8 +21,8 @@
*/
#pragma once
void u8g_i2c_init(uint8_t options);
uint8_t u8g_i2c_wait(uint8_t mask, uint8_t pos);
void u8g_i2c_init(const uint8_t clock_options);
//uint8_t u8g_i2c_wait(uint8_t mask, uint8_t pos);
uint8_t u8g_i2c_start(uint8_t sla);
uint8_t u8g_i2c_send_byte(uint8_t data);
void u8g_i2c_stop();

2
Marlin/src/HAL/HAL_LPC1768/u8g/u8g_com_HAL_LPC1768_ssd_hw_i2c.cpp
View file

@ -86,8 +86,6 @@
#define I2C_CMD_MODE 0x000
#define I2C_DATA_MODE 0x040
//#define U8G_I2C_OPT_FAST 16
uint8_t u8g_com_ssd_I2C_start_sequence(u8g_t *u8g) {
/* are we requested to set the a0 state? */
if (u8g->pin_list[U8G_PI_SET_A0] == 0) return 1;

254
Marlin/src/HAL/HAL_LPC1768/u8g/u8g_com_HAL_LPC1768_ssd_sw_i2c.cpp under construction
View file

@ -1,254 +0,0 @@
/**
* Marlin 3D Printer Firmware
* Copyright (c) 2019 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/>.
*
*/
/**
* Based on U8G2 code - u8x8_byte.c
*
* Universal 8bit Graphics Library (https://github.com/olikraus/u8g2/)
*
* Copyright (c) 2016, olikraus@gmail.com
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice, this list
* of conditions and the following disclaimer.
*
* * Redistributions in binary form must reproduce the above copyright notice, this
* list of conditions and the following disclaimer in the documentation and/or other
* materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
* CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/**
* Software i2c,
* ignores ACK response (which is anyway not provided by some displays)
* also does not allow reading from the device
*/
#ifdef TARGET_LPC1768
#include "../../inc/MarlinConfigPre.h"
#if HAS_GRAPHICAL_LCD
#include <U8glib.h>
//void pinMode(int16_t pin, uint8_t mode);
//void digitalWrite(int16_t pin, uint8_t pin_status);
#define I2C_SLA (0x3C*2)
//#define I2C_CMD_MODE 0x080
#define I2C_CMD_MODE 0x000
#define I2C_DATA_MODE 0x040
//static uint8_t I2C_speed; // 3 - 400KHz, 13 - 100KHz
//#define SPEED_400KHz 3
//#define SPEED_100KHz 13
// #define U8G_I2C_OPT_FAST 16
uint8_t SCL_pin_HAL_LPC1768_sw_I2C, SCL_port_HAL_LPC1768_sw_I2C, SDA_pin_HAL_LPC1768_sw_I2C, SDA_port_HAL_LPC1768_sw_I2C;
#define SPI_SPEED 2 //20: 200KHz 5:750KHz 2:3-4MHz
uint8_t u8g_i2c_send_byte_sw(uint8_t data) {
for (uint8_t i = 0; i < 9; i++) { // 1 extra bit for the ack/nak
if (val & 0x80)
for (uint8_t j = 0; j < SPI_SPEED; j++) {
LPC_GPIO(SDA_port_HAL_LPC1768_sw_I2C)->FIOSET = LPC_PIN(SDA_pin_HAL_LPC1768_sw_I2C);
LPC_GPIO(SDA_port_HAL_LPC1768_sw_I2C)->FIOSET = LPC_PIN(SDA_pin_HAL_LPC1768_sw_I2C);
LPC_GPIO(SDA_port_HAL_LPC1768_sw_I2C)->FIOSET = LPC_PIN(SDA_pin_HAL_LPC1768_sw_I2C);
}
else
for (uint8_t j = 0; j < SPI_SPEED; j++) {
LPC_GPIO(SDA_port_HAL_LPC1768_sw_I2C)->FIOCLR = LPC_PIN(SDA_pin_HAL_LPC1768_sw_I2C);
LPC_GPIO(SDA_port_HAL_LPC1768_sw_I2C)->FIOCLR = LPC_PIN(SDA_pin_HAL_LPC1768_sw_I2C);
LPC_GPIO(SDA_port_HAL_LPC1768_sw_I2C)->FIOCLR = LPC_PIN(SDA_pin_HAL_LPC1768_sw_I2C);
}
for (uint8_t j = 0; j < SPI_SPEED; j++) {
LPC_GPIO(SCL_port_HAL_LPC1768_sw_I2C)->FIOSET = LPC_PIN(SCL_pin_HAL_LPC1768_sw_I2C);
LPC_GPIO(SCL_port_HAL_LPC1768_sw_I2C)->FIOSET = LPC_PIN(SCL_pin_HAL_LPC1768_sw_I2C);
LPC_GPIO(SCL_port_HAL_LPC1768_sw_I2C)->FIOSET = LPC_PIN(SCL_pin_HAL_LPC1768_sw_I2C);
LPC_GPIO(SCL_port_HAL_LPC1768_sw_I2C)->FIOSET = LPC_PIN(SCL_pin_HAL_LPC1768_sw_I2C);
LPC_GPIO(SCL_port_HAL_LPC1768_sw_I2C)->FIOSET = LPC_PIN(SCL_pin_HAL_LPC1768_sw_I2C);
}
for (uint8_t j = 0; j < SPI_SPEED; j++) {
LPC_GPIO(SCL_port_HAL_LPC1768_sw_I2C)->FIOCLR = LPC_PIN(SCL_pin_HAL_LPC1768_sw_I2C);
LPC_GPIO(SCL_port_HAL_LPC1768_sw_I2C)->FIOCLR = LPC_PIN(SCL_pin_HAL_LPC1768_sw_I2C);
}
val <<= 1;
}
return 1;
}
uint8_t u8g_i2c_start_sw(uint8_t sla) { // assert start condition and then send slave address with write bit
/* send the start condition, both lines go from 1 to 0 */
LPC_GPIO(SDA_port_HAL_LPC1768_sw_I2C)->FIOCLR = LPC_PIN(SDA_pin_HAL_LPC1768_sw_I2C);
LPC_GPIO(SCL_port_HAL_LPC1768_sw_I2C)->FIOCLR = LPC_PIN(SCL_pin_HAL_LPC1768_sw_I2C);
DELAY_US(2);
LPC_GPIO(SCL_port_HAL_LPC1768_sw_I2C)->FIOSET = LPC_PIN(SCL_pin_HAL_LPC1768_sw_I2C);
DELAY_US(2);
LPC_GPIO(SDA_port_HAL_LPC1768_sw_I2C)->FIOSET = LPC_PIN(SDA_pin_HAL_LPC1768_sw_I2C);
DELAY_US(2);
LPC_GPIO(SDA_port_HAL_LPC1768_sw_I2C)->FIOCLR = LPC_PIN(SDA_pin_HAL_LPC1768_sw_I2C);
DELAY_US(2);
LPC_GPIO(SCL_port_HAL_LPC1768_sw_I2C)->FIOCLR = LPC_PIN(SCL_pin_HAL_LPC1768_sw_I2C);
u8g_i2c_send_byte_sw(I2C_SLA); // send slave address with write bit
}
void u8g_i2c_stop_sw() { }
void u8g_i2c_init_sw(uint8_t clock_option) { u8g_i2c_start(0); } // send slave address and write bit
uint8_t u8g_com_ssd_I2C_start_sequence_sw(u8g_t *u8g) {
/* are we requested to set the a0 state? */
if (u8g->pin_list[U8G_PI_SET_A0] == 0) return 1;
/* setup bus, might be a repeated start */
if (u8g_i2c_start(I2C_SLA) == 0) return 0;
if (u8g->pin_list[U8G_PI_A0_STATE] == 0) {
if (u8g_i2c_send_byte(I2C_CMD_MODE) == 0) return 0;
}
else if (u8g_i2c_send_byte(I2C_DATA_MODE) == 0) return 0;
u8g->pin_list[U8G_PI_SET_A0] = 0;
return 1;
}
uint8_t u8g_com_HAL_LPC1768_ssd_sw_i2c_fn(u8g_t *u8g, uint8_t msg, uint8_t arg_val, void *arg_ptr) {
switch (msg) {
case U8G_COM_MSG_INIT:
#define LPC1768_PIN_PORT(pin) ((uint8_t)((pin >> 5) & 0b111))
#define LPC1768_PIN_PIN(pin) ((uint8_t)(pin & 0b11111))
SCL_pin_HAL_LPC1768_sw_I2C = LPC1768_PIN_PIN(u8g->pin_list[U8G_PI_SCL]);
SCL_port_HAL_LPC1768_sw_I2C = LPC1768_PIN_PORT(u8g->pin_list[U8G_PI_SCL]);
SDA_pin_HAL_LPC1768_sw_I2C = LPC1768_PIN_PIN(u8g->pin_list[U8G_PI_SDA]);
SDA_port_HAL_LPC1768_sw_I2C = LPC1768_PIN_PORT(u8g->pin_list[U8G_PI_SDA]);
// As defined by Arduino INPUT(0x0), OUTPUT(0x1), INPUT_PULLUP(0x2)
#define OUTPUT 0x1
u8g_SetPIOutput(u8g, U8G_PI_SCL);
u8g_SetPIOutput(u8g, U8G_PI_SDA);
if (U8G_PIN_NONE != u8g->pin_list[U8G_PI_CS]) u8g_SetPIOutput(u8g, U8G_PI_CS);
if (U8G_PIN_NONE != u8g->pin_list[U8G_PI_A0]) u8g_SetPIOutput(u8g, U8G_PI_A0);
if (U8G_PIN_NONE != u8g->pin_list[U8G_PI_RESET]) u8g_SetPIOutput(u8g, U8G_PI_RESET);
//u8g_com_arduino_digital_write(u8g, U8G_PI_SCL, HIGH);
//u8g_com_arduino_digital_write(u8g, U8G_PI_SDA, HIGH);
//u8g->pin_list[U8G_PI_A0_STATE] = 0; /* initial RS state: unknown mode */
u8g_i2c_init_sw(u8g->pin_list[U8G_PI_I2C_OPTION]);
u8g_com_ssd_I2C_start_sequence_sw(u8g);
break;
case U8G_COM_MSG_STOP: break;
case U8G_COM_MSG_RESET: break;
case U8G_COM_MSG_CHIP_SELECT:
u8g->pin_list[U8G_PI_A0_STATE] = 0;
u8g->pin_list[U8G_PI_SET_A0] = 1; /* force a0 to set again, also forces start condition */
if (arg_val == 0) {
/* disable chip, send stop condition */
u8g_i2c_stop_sw();
}
else {
/* enable, do nothing: any byte writing will trigger the i2c start */
}
break;
case U8G_COM_MSG_WRITE_BYTE:
//u8g->pin_list[U8G_PI_SET_A0] = 1;
//if (u8g_com_arduino_ssd_start_sequence(u8g) == 0)
// return u8g_i2c_stop(), 0;
if (u8g_i2c_send_byte_sw(arg_val) == 0)
return u8g_i2c_stop_sw(), 0;
// u8g_i2c_stop();
break;
case U8G_COM_MSG_WRITE_SEQ: {
//u8g->pin_list[U8G_PI_SET_A0] = 1;
if (u8g_com_ssd_I2C_start_sequence_sw(u8g) == 0)
return u8g_i2c_stop_sw(), 0;
uint8_t *ptr = (uint8_t *)arg_ptr;
while (arg_val > 0) {
if (u8g_i2c_send_byte_sw(*ptr++) == 0)
return u8g_i2c_stop_sw(), 0;
arg_val--;
}
}
// u8g_i2c_stop();
break;
case U8G_COM_MSG_WRITE_SEQ_P: {
//u8g->pin_list[U8G_PI_SET_A0] = 1;
if (u8g_com_ssd_I2C_start_sequence_sw(u8g) == 0)
return u8g_i2c_stop_sw(), 0;
uint8_t *ptr = (uint8_t *)arg_ptr;
while (arg_val > 0) {
if (u8g_i2c_send_byte_sw(u8g_pgm_read(ptr)) == 0) return 0;
ptr++;
arg_val--;
}
}
// u8g_i2c_stop();
break;
case U8G_COM_MSG_ADDRESS: /* define cmd (arg_val = 0) or data mode (arg_val = 1) */
u8g->pin_list[U8G_PI_A0_STATE] = arg_val;
u8g->pin_list[U8G_PI_SET_A0] = 1; /* force a0 to set again */
u8g_i2c_start_sw(0); // send slave address and write bit
u8g_i2c_send_byte_sw(arg_val ? 0x40 : 0x80); // Write to ? Graphics DRAM mode : Command mode
break;
}
return 1;
}
#endif // HAS_GRAPHICAL_LCD
#endif // TARGET_LPC1768

10
Marlin/src/feature/digipot/digipot_mcp4451.cpp
View file

@ -47,7 +47,7 @@ static byte current_to_wiper(const float current) {
return byte(CEIL(float((DIGIPOT_I2C_FACTOR * current))));
}
static void i2c_send(const byte addr, const byte a, const byte b) {
static void digipot_i2c_send(const byte addr, const byte a, const byte b) {
#if MB(MKS_SBASE)
digipot_mcp4451_start(addr);
digipot_mcp4451_send_byte(a);
@ -67,17 +67,17 @@ void digipot_i2c_set_current(const uint8_t channel, const float current) {
const byte addr = channel < 4 ? DIGIPOT_I2C_ADDRESS_A : DIGIPOT_I2C_ADDRESS_B; // channel 0-3 vs 4-7
// Initial setup
i2c_send(addr, 0x40, 0xFF);
i2c_send(addr, 0xA0, 0xFF);
digipot_i2c_send(addr, 0x40, 0xFF);
digipot_i2c_send(addr, 0xA0, 0xFF);
// Set actual wiper value
byte addresses[4] = { 0x00, 0x10, 0x60, 0x70 };
i2c_send(addr, addresses[channel & 0x3], current_to_wiper(_MIN(float(_MAX(current, 0)), DIGIPOT_I2C_MAX_CURRENT)));
digipot_i2c_send(addr, addresses[channel & 0x3], current_to_wiper(_MIN(float(_MAX(current, 0)), DIGIPOT_I2C_MAX_CURRENT)));
}
void digipot_i2c_init() {
#if MB(MKS_SBASE)
digipot_mcp4451_init();
configure_i2c();
#else
Wire.begin();
#endif