From e8701195e66f2d27ffe17fb514eae8173795aaf7 Mon Sep 17 00:00:00 2001 From: Georgiy Bondarenko <69736697+nehilo@users.noreply.github.com> Date: Thu, 4 Mar 2021 22:54:23 +0500 Subject: Initial commit --- Marlin/src/HAL/LPC1768/u8g/LCD_I2C_routines.cpp | 123 ++++++++++++++++++++++++ 1 file changed, 123 insertions(+) create mode 100644 Marlin/src/HAL/LPC1768/u8g/LCD_I2C_routines.cpp (limited to 'Marlin/src/HAL/LPC1768/u8g/LCD_I2C_routines.cpp') diff --git a/Marlin/src/HAL/LPC1768/u8g/LCD_I2C_routines.cpp b/Marlin/src/HAL/LPC1768/u8g/LCD_I2C_routines.cpp new file mode 100644 index 0000000..a48a820 --- /dev/null +++ b/Marlin/src/HAL/LPC1768/u8g/LCD_I2C_routines.cpp @@ -0,0 +1,123 @@ +/** + * Marlin 3D Printer Firmware + * Copyright (c) 2020 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 . + * + */ + +// 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 "../include/i2c_util.h" +#include "../../../core/millis_t.h" + +extern int millis(); + +#ifdef __cplusplus + extern "C" { +#endif + +////////////////////////////////////////////////////////////////////////////////////// + +// 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. + +static uint32_t _I2C_Start(LPC_I2C_TypeDef *I2Cx) { + // Reset STA, STO, SI + I2Cx->I2CONCLR = I2C_I2CONCLR_SIC|I2C_I2CONCLR_STOC|I2C_I2CONCLR_STAC; + + // Enter to Master Transmitter mode + I2Cx->I2CONSET = I2C_I2CONSET_STA; + + // Wait for complete + while (!(I2Cx->I2CONSET & I2C_I2CONSET_SI)); + I2Cx->I2CONCLR = I2C_I2CONCLR_STAC; + return (I2Cx->I2STAT & I2C_STAT_CODE_BITMASK); +} + +static void _I2C_Stop (LPC_I2C_TypeDef *I2Cx) { + /* Make sure start bit is not active */ + if (I2Cx->I2CONSET & I2C_I2CONSET_STA) + I2Cx->I2CONCLR = I2C_I2CONCLR_STAC; + + I2Cx->I2CONSET = I2C_I2CONSET_STO|I2C_I2CONSET_AA; + I2Cx->I2CONCLR = I2C_I2CONCLR_SIC; +} + +////////////////////////////////////////////////////////////////////////////////////// + +#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 + +I2C_M_SETUP_Type transferMCfg; + +#define I2C_status (LPC_I2C1->I2STAT & I2C_STAT_CODE_BITMASK) + +// 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. + do{ + _I2C_Stop(I2CDEV_M); // output stop state on I2C bus + _I2C_Start(I2CDEV_M); // output start state on I2C bus + while ((I2C_status != I2C_I2STAT_M_TX_START) + && (I2C_status != I2C_I2STAT_M_TX_RESTART) + && (I2C_status != I2C_I2STAT_M_TX_DAT_ACK) + && (I2C_status != I2C_I2STAT_M_TX_DAT_NACK)); //wait for start to be asserted + + LPC_I2C1->I2CONCLR = I2C_I2CONCLR_STAC; // clear start state before tansmitting slave address + LPC_I2C1->I2DAT = I2CDEV_S_ADDR & I2C_I2DAT_BITMASK; // transmit slave address & write bit + LPC_I2C1->I2CONSET = I2C_I2CONSET_AA; + LPC_I2C1->I2CONCLR = I2C_I2CONCLR_SIC; + 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 + }while ( (I2C_status == I2C_I2STAT_M_TX_DAT_ACK) || (I2C_status == I2C_I2STAT_M_TX_DAT_NACK)); + return 1; +} + +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) { + #define I2C_TIMEOUT 3 + LPC_I2C1->I2DAT = data & I2C_I2DAT_BITMASK; // transmit data + LPC_I2C1->I2CONSET = I2C_I2CONSET_AA; + LPC_I2C1->I2CONCLR = I2C_I2CONCLR_SIC; + const millis_t timeout = millis() + I2C_TIMEOUT; + while ((I2C_status != I2C_I2STAT_M_TX_DAT_ACK) && (I2C_status != I2C_I2STAT_M_TX_DAT_NACK) && PENDING(millis(), timeout)); // wait for xmit to finish + // had hangs with SH1106 so added time out - have seen temporary screen corruption when this happens + return 1; +} + +void u8g_i2c_stop() { +} + + +#ifdef __cplusplus + } +#endif + +#endif // TARGET_LPC1768 -- cgit v1.2.3