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- /**
- * 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 <https://www.gnu.org/licenses/>.
- *
- */
-
- /********************************************************************************
- * @file eeprom_BL24CXX.cpp
- * @brief i2c EEPROM for Ender 3 v2 board (4.2.2)
- ********************************************************************************/
-
- #include "../../inc/MarlinConfig.h"
-
- #if ENABLED(IIC_BL24CXX_EEPROM)
-
- #include "eeprom_BL24CXX.h"
- #include "../../MarlinCore.h"
-
- #include <stdlib.h>
-
- /******************** IIC ********************/
-
- // 初始化IIC
- void IIC::init() {
- SET_OUTPUT(IIC_EEPROM_SDA);
- SET_OUTPUT(IIC_EEPROM_SCL);
-
- IIC_SCL_1();
- IIC_SDA_1();
- }
-
- // 产生IIC起始信号
- void IIC::start() {
- SDA_OUT(); // sda线输出
- IIC_SDA_1();
- IIC_SCL_1();
- delay_us(4);
- IIC_SDA_0(); // START:when CLK is high, DATA change form high to low
- delay_us(4);
- IIC_SCL_0(); // 钳住I2C总线,准备发送或接收数据
- }
-
- // 产生IIC停止信号
- void IIC::stop() {
- SDA_OUT(); // sda线输出
- IIC_SCL_0();
- IIC_SDA_0(); // STOP:when CLK is high DATA change form low to high
- delay_us(4);
- IIC_SCL_1();
- IIC_SDA_1(); // 发送I2C总线结束信号
- delay_us(4);
- }
-
- // 等待应答信号到来
- // 返回值:1,接收应答失败
- // 0,接收应答成功
- uint8_t IIC::wait_ack() {
- uint8_t ucErrTime=0;
- SDA_IN(); // SDA设置为输入
- IIC_SDA_1();delay_us(1);
- IIC_SCL_1();delay_us(1);
- while (READ_SDA()) {
- ucErrTime++;
- if (ucErrTime>250) {
- stop();
- return 1;
- }
- }
- IIC_SCL_0(); // 时钟输出0
- return 0;
- }
-
- // 产生ACK应答
- void IIC::ack() {
- IIC_SCL_0();
- SDA_OUT();
- IIC_SDA_0();
- delay_us(2);
- IIC_SCL_1();
- delay_us(2);
- IIC_SCL_0();
- }
-
- // 不产生ACK应答
- void IIC::nAck() {
- IIC_SCL_0();
- SDA_OUT();
- IIC_SDA_1();
- delay_us(2);
- IIC_SCL_1();
- delay_us(2);
- IIC_SCL_0();
- }
-
- // IIC发送一个字节
- // 返回从机有无应答
- // 1,有应答
- // 0,无应答
- void IIC::send_byte(uint8_t txd) {
- SDA_OUT();
- IIC_SCL_0(); // 拉低时钟开始数据传输
- LOOP_L_N(t, 8) {
- // IIC_SDA = (txd & 0x80) >> 7;
- if (txd & 0x80) IIC_SDA_1(); else IIC_SDA_0();
- txd <<= 1;
- delay_us(2); // 对TEA5767这三个延时都是必须的
- IIC_SCL_1();
- delay_us(2);
- IIC_SCL_0();
- delay_us(2);
- }
- }
-
- // 读1个字节,ack=1时,发送ACK,ack=0,发送nACK
- uint8_t IIC::read_byte(unsigned char ack_chr) {
- unsigned char receive = 0;
- SDA_IN(); // SDA设置为输入
- LOOP_L_N(i, 8) {
- IIC_SCL_0();
- delay_us(2);
- IIC_SCL_1();
- receive <<= 1;
- if (READ_SDA()) receive++;
- delay_us(1);
- }
- ack_chr ? ack() : nAck(); // 发送ACK / 发送nACK
- return receive;
- }
-
- /******************** EEPROM ********************/
-
- // 初始化IIC接口
- void BL24CXX::init() { IIC::init(); }
-
- // 在BL24CXX指定地址读出一个数据
- // ReadAddr:开始读数的地址
- // 返回值 :读到的数据
- uint8_t BL24CXX::readOneByte(uint16_t ReadAddr) {
- uint8_t temp = 0;
- IIC::start();
- if (EE_TYPE > BL24C16) {
- IIC::send_byte(0xA0); // 发送写命令
- IIC::wait_ack();
- IIC::send_byte(ReadAddr >> 8); // 发送高地址
- IIC::wait_ack();
- }
- else
- IIC::send_byte(0xA0 + ((ReadAddr >> 8) << 1)); // 发送器件地址0xA0,写数据
-
- IIC::wait_ack();
- IIC::send_byte(ReadAddr & 0xFF); // 发送低地址
- IIC::wait_ack();
- IIC::start();
- IIC::send_byte(0xA1); // 进入接收模式
- IIC::wait_ack();
- temp = IIC::read_byte(0);
- IIC::stop(); // 产生一个停止条件
- return temp;
- }
-
- // 在BL24CXX指定地址写入一个数据
- // WriteAddr :写入数据的目的地址
- // DataToWrite:要写入的数据
- void BL24CXX::writeOneByte(uint16_t WriteAddr, uint8_t DataToWrite) {
- IIC::start();
- if (EE_TYPE > BL24C16) {
- IIC::send_byte(0xA0); // 发送写命令
- IIC::wait_ack();
- IIC::send_byte(WriteAddr >> 8); // 发送高地址
- }
- else {
- IIC::send_byte(0xA0 + ((WriteAddr >> 8) << 1)); // 发送器件地址0xA0,写数据
- }
- IIC::wait_ack();
- IIC::send_byte(WriteAddr & 0xFF); // 发送低地址
- IIC::wait_ack();
- IIC::send_byte(DataToWrite); // 发送字节
- IIC::wait_ack();
- IIC::stop(); // 产生一个停止条件
- delay(10);
- }
-
- // 在BL24CXX里面的指定地址开始写入长度为Len的数据
- // 该函数用于写入16bit或者32bit的数据.
- // WriteAddr :开始写入的地址
- // DataToWrite:数据数组首地址
- // Len :要写入数据的长度2,4
- void BL24CXX::writeLenByte(uint16_t WriteAddr, uint32_t DataToWrite, uint8_t Len) {
- LOOP_L_N(t, Len)
- writeOneByte(WriteAddr + t, (DataToWrite >> (8 * t)) & 0xFF);
- }
-
- // 在BL24CXX里面的指定地址开始读出长度为Len的数据
- // 该函数用于读出16bit或者32bit的数据.
- // ReadAddr :开始读出的地址
- // 返回值 :数据
- // Len :要读出数据的长度2,4
- uint32_t BL24CXX::readLenByte(uint16_t ReadAddr, uint8_t Len) {
- uint32_t temp = 0;
- LOOP_L_N(t, Len) {
- temp <<= 8;
- temp += readOneByte(ReadAddr + Len - t - 1);
- }
- return temp;
- }
-
- // 检查BL24CXX是否正常
- // 这里用了24XX的最后一个地址(255)来存储标志字.
- // 如果用其他24C系列,这个地址要修改
- // 返回1:检测失败
- // 返回0:检测成功
- uint8_t BL24CXX::check() {
- uint8_t temp;
- temp = readOneByte(255); // 避免每次开机都写BL24CXX
- if (temp == 'U') return 0;
- else { // 排除第一次初始化的情况
- writeOneByte(255, 'U');
- temp = readOneByte(255);
- if (temp == 'U') return 0;
- }
- return 1;
- }
-
- // 在BL24CXX里面的指定地址开始读出指定个数的数据
- // ReadAddr :开始读出的地址 对24c02为0~255
- // pBuffer :数据数组首地址
- // NumToRead:要读出数据的个数
- void BL24CXX::read(uint16_t ReadAddr, uint8_t *pBuffer, uint16_t NumToRead) {
- while (NumToRead) {
- *pBuffer++ = readOneByte(ReadAddr++);
- NumToRead--;
- }
- }
-
- // 在BL24CXX里面的指定地址开始写入指定个数的数据
- // WriteAddr :开始写入的地址 对24c02为0~255
- // pBuffer :数据数组首地址
- // NumToWrite:要写入数据的个数
- void BL24CXX::write(uint16_t WriteAddr, uint8_t *pBuffer, uint16_t NumToWrite) {
- while (NumToWrite--) {
- writeOneByte(WriteAddr, *pBuffer);
- WriteAddr++;
- pBuffer++;
- }
- }
-
- #endif // IIC_BL24CXX_EEPROM
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