Scott Lahteine
7 years ago
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GitHub
GitHub
33 changed files with 577 additions and 585 deletions
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/**
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* Marlin 3D Printer Firmware |
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* Copyright (C) 2016, 2017 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
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* |
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* Based on Sprinter and grbl. |
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* Copyright (C) 2011 Camiel Gubbels / Erik van der Zalm |
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* |
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* This program is free software: you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation, either version 3 of the License, or |
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* (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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* |
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*/ |
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* Marlin 3D Printer Firmware |
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* Copyright (C) 2016, 2017 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
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* |
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* Based on Sprinter and grbl. |
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* Copyright (C) 2011 Camiel Gubbels / Erik van der Zalm |
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* |
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* This program is free software: you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation, either version 3 of the License, or |
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* (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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* |
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*/ |
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// adapted from I2C/master/master.c example
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// https://www-users.cs.york.ac.uk/~pcc/MCP/HAPR-Course-web/CMSIS/examples/html/master_8c_source.html
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#ifdef TARGET_LPC1768 |
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#ifdef __cplusplus |
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extern "C" { |
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#endif |
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#ifdef __cplusplus |
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extern "C" { |
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#endif |
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#include <lpc17xx_i2c.h> |
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#include <lpc17xx_pinsel.h> |
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#include <lpc17xx_libcfg_default.h> |
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#include <lpc17xx_i2c.h> |
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#include <lpc17xx_pinsel.h> |
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#include <lpc17xx_libcfg_default.h> |
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//////////////////////////////////////////////////////////////////////////////////////
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//////////////////////////////////////////////////////////////////////////////////////
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// These two routines are exact copies of the lpc17xx_i2c.c routines. Couldn't link to
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// to the lpc17xx_i2c.c routines so had to copy them into this file & rename them.
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// These two routines are exact copies of the lpc17xx_i2c.c routines. Couldn't link to
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// to the lpc17xx_i2c.c routines so had to copy them into this file & rename them.
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static uint32_t _I2C_Start (LPC_I2C_TypeDef *I2Cx) { |
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// Reset STA, STO, SI
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I2Cx->I2CONCLR = I2C_I2CONCLR_SIC|I2C_I2CONCLR_STOC|I2C_I2CONCLR_STAC; |
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static uint32_t _I2C_Start (LPC_I2C_TypeDef *I2Cx) |
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{ |
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// Reset STA, STO, SI
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I2Cx->I2CONCLR = I2C_I2CONCLR_SIC|I2C_I2CONCLR_STOC|I2C_I2CONCLR_STAC; |
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// Enter to Master Transmitter mode
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I2Cx->I2CONSET = I2C_I2CONSET_STA; |
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// Enter to Master Transmitter mode
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I2Cx->I2CONSET = I2C_I2CONSET_STA; |
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// Wait for complete
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while (!(I2Cx->I2CONSET & I2C_I2CONSET_SI)); |
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I2Cx->I2CONCLR = I2C_I2CONCLR_STAC; |
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return (I2Cx->I2STAT & I2C_STAT_CODE_BITMASK); |
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} |
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// Wait for complete
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while (!(I2Cx->I2CONSET & I2C_I2CONSET_SI)); |
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static void _I2C_Stop (LPC_I2C_TypeDef *I2Cx) { |
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/* Make sure start bit is not active */ |
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if (I2Cx->I2CONSET & I2C_I2CONSET_STA) |
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I2Cx->I2CONCLR = I2C_I2CONCLR_STAC; |
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return (I2Cx->I2STAT & I2C_STAT_CODE_BITMASK); |
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} |
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static void _I2C_Stop (LPC_I2C_TypeDef *I2Cx) |
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{ |
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I2Cx->I2CONSET = I2C_I2CONSET_STO|I2C_I2CONSET_AA; |
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I2Cx->I2CONCLR = I2C_I2CONCLR_SIC; |
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} |
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/* Make sure start bit is not active */ |
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if (I2Cx->I2CONSET & I2C_I2CONSET_STA) |
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{ |
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I2Cx->I2CONCLR = I2C_I2CONCLR_STAC; |
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} |
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I2Cx->I2CONSET = I2C_I2CONSET_STO|I2C_I2CONSET_AA; |
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//////////////////////////////////////////////////////////////////////////////////////
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I2Cx->I2CONCLR = I2C_I2CONCLR_SIC; |
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} |
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#define USEDI2CDEV_M 1 // use I2C1 controller
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//////////////////////////////////////////////////////////////////////////////////////
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#if (USEDI2CDEV_M == 0) |
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#define I2CDEV_M LPC_I2C0 |
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#elif (USEDI2CDEV_M == 1) |
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#define I2CDEV_M LPC_I2C1 |
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#elif (USEDI2CDEV_M == 2) |
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#define I2CDEV_M LPC_I2C2 |
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#else |
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#error "Master I2C device not defined!" |
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#endif |
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#define USEDI2CDEV_M 1 // use I2C1 controller
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PINSEL_CFG_Type PinCfg; |
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I2C_M_SETUP_Type transferMCfg; |
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#if (USEDI2CDEV_M == 0) |
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#define I2CDEV_M LPC_I2C0 |
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#elif (USEDI2CDEV_M == 1) |
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#define I2CDEV_M LPC_I2C1 |
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#elif (USEDI2CDEV_M == 2) |
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#define I2CDEV_M LPC_I2C2 |
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#else |
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#error "Master I2C device not defined!" |
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#endif |
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#define I2C_status (LPC_I2C1->I2STAT & I2C_STAT_CODE_BITMASK) |
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PINSEL_CFG_Type PinCfg; |
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I2C_M_SETUP_Type transferMCfg; |
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#define I2C_status (LPC_I2C1->I2STAT & I2C_STAT_CODE_BITMASK) |
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uint8_t digipot_mcp4451_start(uint8_t sla) { // send slave address and write bit
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// Sometimes TX data ACK or NAK status is returned. That mean the start state didn't
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// happen which means only the value of the slave address was send. Keep looping until
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// the slave address and write bit are actually sent.
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do{ |
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_I2C_Stop(I2CDEV_M); // output stop state on I2C bus
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_I2C_Start(I2CDEV_M); // output start state on I2C bus
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while ((I2C_status != I2C_I2STAT_M_TX_START) |
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&& (I2C_status != I2C_I2STAT_M_TX_RESTART) |
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&& (I2C_status != I2C_I2STAT_M_TX_DAT_ACK) |
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&& (I2C_status != I2C_I2STAT_M_TX_DAT_NACK)); //wait for start to be asserted
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LPC_I2C1->I2CONCLR = I2C_I2CONCLR_STAC; // clear start state before tansmitting slave address
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LPC_I2C1->I2DAT = (sla <<1) & I2C_I2DAT_BITMASK; // transmit slave address & write bit
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LPC_I2C1->I2CONSET = I2C_I2CONSET_AA; |
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LPC_I2C1->I2CONCLR = I2C_I2CONCLR_SIC; |
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while ((I2C_status != I2C_I2STAT_M_TX_SLAW_ACK) |
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&& (I2C_status != I2C_I2STAT_M_TX_SLAW_NACK) |
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&& (I2C_status != I2C_I2STAT_M_TX_DAT_ACK) |
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&& (I2C_status != I2C_I2STAT_M_TX_DAT_NACK)); //wait for slaw to finish
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}while ( (I2C_status == I2C_I2STAT_M_TX_DAT_ACK) || (I2C_status == I2C_I2STAT_M_TX_DAT_NACK)); |
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return 1; |
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} |
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uint8_t digipot_mcp4451_start(uint8_t sla) { // send slave address and write bit
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// Sometimes TX data ACK or NAK status is returned. That mean the start state didn't
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// happen which means only the value of the slave address was send. Keep looping until
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// the slave address and write bit are actually sent.
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do{ |
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_I2C_Stop(I2CDEV_M); // output stop state on I2C bus
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_I2C_Start(I2CDEV_M); // output start state on I2C bus
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while ((I2C_status != I2C_I2STAT_M_TX_START) |
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&& (I2C_status != I2C_I2STAT_M_TX_RESTART) |
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&& (I2C_status != I2C_I2STAT_M_TX_DAT_ACK) |
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&& (I2C_status != I2C_I2STAT_M_TX_DAT_NACK)); //wait for start to be asserted
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LPC_I2C1->I2CONCLR = I2C_I2CONCLR_STAC; // clear start state before tansmitting slave address
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LPC_I2C1->I2DAT = (sla <<1) & I2C_I2DAT_BITMASK; // transmit slave address & write bit
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LPC_I2C1->I2CONSET = I2C_I2CONSET_AA; |
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LPC_I2C1->I2CONCLR = I2C_I2CONCLR_SIC; |
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while ((I2C_status != I2C_I2STAT_M_TX_SLAW_ACK) |
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&& (I2C_status != I2C_I2STAT_M_TX_SLAW_NACK) |
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&& (I2C_status != I2C_I2STAT_M_TX_DAT_ACK) |
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&& (I2C_status != I2C_I2STAT_M_TX_DAT_NACK)); //wait for slaw to finish
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}while ( (I2C_status == I2C_I2STAT_M_TX_DAT_ACK) || (I2C_status == I2C_I2STAT_M_TX_DAT_NACK)); |
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return 1; |
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} |
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void digipot_mcp4451_init(void) { |
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/**
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* Init I2C pin connect |
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*/ |
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PinCfg.OpenDrain = 0; |
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PinCfg.Pinmode = 0; |
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#if ((USEDI2CDEV_M == 0)) |
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PinCfg.Funcnum = 1; |
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PinCfg.Pinnum = 27; |
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PinCfg.Portnum = 0; |
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PINSEL_ConfigPin(&PinCfg); // SDA0 / D57 AUX-1
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PinCfg.Pinnum = 28; |
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PINSEL_ConfigPin(&PinCfg); // SCL0 / D58 AUX-1
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#endif |
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#if ((USEDI2CDEV_M == 1)) |
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PinCfg.Funcnum = 3; |
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PinCfg.Pinnum = 0; |
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PinCfg.Portnum = 0; |
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PINSEL_ConfigPin(&PinCfg); // SDA1 / D20 SCA
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PinCfg.Pinnum = 1; |
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PINSEL_ConfigPin(&PinCfg); // SCL1 / D21 SCL
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#endif |
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#if ((USEDI2CDEV_M == 2)) |
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PinCfg.Funcnum = 2; |
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PinCfg.Pinnum = 10; |
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PinCfg.Portnum = 0; |
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PINSEL_ConfigPin(&PinCfg); // SDA2 / D38 X_ENABLE_PIN
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PinCfg.Pinnum = 11; |
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PINSEL_ConfigPin(&PinCfg); // SCL2 / D55 X_DIR_PIN
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#endif |
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// Initialize I2C peripheral
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I2C_Init(I2CDEV_M, 400000); // hardwired to 400KHz bit rate, 100KHz is the other option
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void digipot_mcp4451_init(void) { |
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/*
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* Init I2C pin connect |
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*/ |
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PinCfg.OpenDrain = 0; |
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PinCfg.Pinmode = 0; |
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#if ((USEDI2CDEV_M == 0)) |
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PinCfg.Funcnum = 1; |
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PinCfg.Pinnum = 27; |
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PinCfg.Portnum = 0; |
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PINSEL_ConfigPin(&PinCfg); // SDA0 / D57 AUX-1
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PinCfg.Pinnum = 28; |
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PINSEL_ConfigPin(&PinCfg); // SCL0 / D58 AUX-1
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#endif |
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#if ((USEDI2CDEV_M == 1)) |
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PinCfg.Funcnum = 3; |
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PinCfg.Pinnum = 0; |
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PinCfg.Portnum = 0; |
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PINSEL_ConfigPin(&PinCfg); // SDA1 / D20 SCA
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PinCfg.Pinnum = 1; |
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PINSEL_ConfigPin(&PinCfg); // SCL1 / D21 SCL
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#endif |
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#if ((USEDI2CDEV_M == 2)) |
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PinCfg.Funcnum = 2; |
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PinCfg.Pinnum = 10; |
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PinCfg.Portnum = 0; |
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PINSEL_ConfigPin(&PinCfg); // SDA2 / D38 X_ENABLE_PIN
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PinCfg.Pinnum = 11; |
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PINSEL_ConfigPin(&PinCfg); // SCL2 / D55 X_DIR_PIN
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#endif |
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// Initialize I2C peripheral
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I2C_Init(I2CDEV_M, 400000); // hardwired to 400KHz bit rate, 100KHz is the other option
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/* Enable Master I2C operation */ |
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I2C_Cmd(I2CDEV_M, I2C_MASTER_MODE, ENABLE); |
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} |
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/* Enable Master I2C operation */ |
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I2C_Cmd(I2CDEV_M, I2C_MASTER_MODE, ENABLE); |
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} |
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uint8_t digipot_mcp4451_send_byte(uint8_t data) { |
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uint8_t digipot_mcp4451_send_byte(uint8_t data) { |
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LPC_I2C1->I2DAT = data & I2C_I2DAT_BITMASK; // transmit data
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LPC_I2C1->I2CONSET = I2C_I2CONSET_AA; |
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LPC_I2C1->I2CONCLR = I2C_I2CONCLR_SIC; |
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while ((I2C_status != I2C_I2STAT_M_TX_DAT_ACK) && (I2C_status != I2C_I2STAT_M_TX_DAT_NACK)); // wait for xmit to finish
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return 1; |
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} |
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LPC_I2C1->I2DAT = data & I2C_I2DAT_BITMASK; // transmit data
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LPC_I2C1->I2CONSET = I2C_I2CONSET_AA; |
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LPC_I2C1->I2CONCLR = I2C_I2CONCLR_SIC; |
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while ((I2C_status != I2C_I2STAT_M_TX_DAT_ACK) && (I2C_status != I2C_I2STAT_M_TX_DAT_NACK)); // wait for xmit to finish
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return 1; |
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#ifdef __cplusplus |
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} |
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#ifdef __cplusplus |
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} |
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#endif |
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#endif |
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#endif // TARGET_LPC1768
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