123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285 |
- /**
- * 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/>.
- *
- */
-
- #include "../inc/MarlinConfig.h"
-
- #if ENABLED(IIC_BL24CXX_EEPROM)
-
- /**
- * PersistentStore for Arduino-style EEPROM interface
- * with simple implementations supplied by Marlin.
- */
-
- #include "BL24CXX.h"
- #ifdef __STM32F1__
- #include <libmaple/gpio.h>
- #else
- #include "../HAL/shared/Delay.h"
- #define delay_us(n) DELAY_US(n)
- #endif
-
- #ifndef EEPROM_WRITE_DELAY
- #define EEPROM_WRITE_DELAY 10
- #endif
- #ifndef EEPROM_DEVICE_ADDRESS
- #define EEPROM_DEVICE_ADDRESS (0x50 << 1)
- #endif
-
- // IO direction setting
- #ifdef __STM32F1__
- #define SDA_IN() do{ PIN_MAP[IIC_EEPROM_SDA].gpio_device->regs->CRH &= 0XFFFF0FFF; PIN_MAP[IIC_EEPROM_SDA].gpio_device->regs->CRH |= 8 << 12; }while(0)
- #define SDA_OUT() do{ PIN_MAP[IIC_EEPROM_SDA].gpio_device->regs->CRH &= 0XFFFF0FFF; PIN_MAP[IIC_EEPROM_SDA].gpio_device->regs->CRH |= 3 << 12; }while(0)
- #elif defined(STM32F1) || defined(STM32F4)
- #define SDA_IN() SET_INPUT(IIC_EEPROM_SDA)
- #define SDA_OUT() SET_OUTPUT(IIC_EEPROM_SDA)
- #endif
-
- // IO ops
- #define IIC_SCL_0() WRITE(IIC_EEPROM_SCL, LOW)
- #define IIC_SCL_1() WRITE(IIC_EEPROM_SCL, HIGH)
- #define IIC_SDA_0() WRITE(IIC_EEPROM_SDA, LOW)
- #define IIC_SDA_1() WRITE(IIC_EEPROM_SDA, HIGH)
- #define READ_SDA() READ(IIC_EEPROM_SDA)
-
- //
- // Simple IIC interface via libmaple
- //
-
- // Initialize IIC
- void IIC::init() {
- SET_OUTPUT(IIC_EEPROM_SDA);
- SET_OUTPUT(IIC_EEPROM_SCL);
- IIC_SCL_1();
- IIC_SDA_1();
- }
-
- // Generate IIC start signal
- void IIC::start() {
- SDA_OUT(); // SDA line output
- IIC_SDA_1();
- IIC_SCL_1();
- delay_us(4);
- IIC_SDA_0(); // START:when CLK is high, DATA change from high to low
- delay_us(4);
- IIC_SCL_0(); // Clamp the I2C bus, ready to send or receive data
- }
-
- // Generate IIC stop signal
- void IIC::stop() {
- SDA_OUT(); // SDA line output
- IIC_SCL_0();
- IIC_SDA_0(); // STOP:when CLK is high DATA change from low to high
- delay_us(4);
- IIC_SCL_1();
- IIC_SDA_1(); // Send I2C bus end signal
- delay_us(4);
- }
-
- // Wait for the response signal to arrive
- // 1 = failed to receive response
- // 0 = response received
- uint8_t IIC::wait_ack() {
- uint8_t ucErrTime = 0;
- SDA_IN(); // SDA is set as input
- IIC_SDA_1(); delay_us(1);
- IIC_SCL_1(); delay_us(1);
- while (READ_SDA()) {
- if (++ucErrTime > 250) {
- stop();
- return 1;
- }
- }
- IIC_SCL_0(); // Clock output 0
- return 0;
- }
-
- // Generate ACK response
- void IIC::ack() {
- IIC_SCL_0();
- SDA_OUT();
- IIC_SDA_0();
- delay_us(2);
- IIC_SCL_1();
- delay_us(2);
- IIC_SCL_0();
- }
-
- // No ACK response
- void IIC::nAck() {
- IIC_SCL_0();
- SDA_OUT();
- IIC_SDA_1();
- delay_us(2);
- IIC_SCL_1();
- delay_us(2);
- IIC_SCL_0();
- }
-
- // Send one IIC byte
- // Return whether the slave responds
- // 1 = there is a response
- // 0 = no response
- void IIC::send_byte(uint8_t txd) {
- SDA_OUT();
- IIC_SCL_0(); // Pull down the clock to start data transmission
- 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); // All three delays are necessary for TEA5767
- IIC_SCL_1();
- delay_us(2);
- IIC_SCL_0();
- delay_us(2);
- }
- }
-
- // Read 1 byte, when ack=1, send ACK, ack=0, send nACK
- uint8_t IIC::read_byte(unsigned char ack_chr) {
- unsigned char receive = 0;
- SDA_IN(); // SDA is set as input
- 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(); // Send ACK / send nACK
- return receive;
- }
-
- /******************** EEPROM ********************/
-
- // Initialize the IIC interface
- void BL24CXX::init() { IIC::init(); }
-
- // Read a byte at the specified address
- // ReadAddr: the address to start reading
- // Return: the byte read
- uint8_t BL24CXX::readOneByte(uint16_t ReadAddr) {
- uint8_t temp = 0;
- IIC::start();
- if (EE_TYPE > BL24C16) {
- IIC::send_byte(EEPROM_DEVICE_ADDRESS); // Send write command
- IIC::wait_ack();
- IIC::send_byte(ReadAddr >> 8); // Send high address
- IIC::wait_ack();
- }
- else
- IIC::send_byte(EEPROM_DEVICE_ADDRESS + ((ReadAddr >> 8) << 1)); // Send device address 0xA0, write data
-
- IIC::wait_ack();
- IIC::send_byte(ReadAddr & 0xFF); // Send low address
- IIC::wait_ack();
- IIC::start();
- IIC::send_byte(EEPROM_DEVICE_ADDRESS | 0x01); // Send byte
- IIC::wait_ack();
- temp = IIC::read_byte(0);
- IIC::stop(); // Generate a stop condition
- return temp;
- }
-
- // Write a data at the address specified by BL24CXX
- // WriteAddr: The destination address for writing data
- // DataToWrite: the data to be written
- void BL24CXX::writeOneByte(uint16_t WriteAddr, uint8_t DataToWrite) {
- IIC::start();
- if (EE_TYPE > BL24C16) {
- IIC::send_byte(EEPROM_DEVICE_ADDRESS); // Send write command
- IIC::wait_ack();
- IIC::send_byte(WriteAddr >> 8); // Send high address
- }
- else
- IIC::send_byte(EEPROM_DEVICE_ADDRESS + ((WriteAddr >> 8) << 1)); // Send device address 0xA0, write data
-
- IIC::wait_ack();
- IIC::send_byte(WriteAddr & 0xFF); // Send low address
- IIC::wait_ack();
- IIC::send_byte(DataToWrite); // Receiving mode
- IIC::wait_ack();
- IIC::stop(); // Generate a stop condition
- delay(10);
- }
-
- // Start writing data of length Len at the specified address in BL24CXX
- // This function is used to write 16bit or 32bit data.
- // WriteAddr: the address to start writing
- // DataToWrite: the first address of the data array
- // Len: The length of the data to be written 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);
- }
-
- // Start reading data of length Len from the specified address in BL24CXX
- // This function is used to read 16bit or 32bit data.
- // ReadAddr: the address to start reading
- // Return value: data
- // Len: The length of the data to be read 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;
- }
-
- // Check if BL24CXX is normal
- // Return 1: Detection failed
- // return 0: detection is successful
- #define BL24CXX_TEST_ADDRESS 0x00
- #define BL24CXX_TEST_VALUE 0x55
-
- bool BL24CXX::_check() {
- return (readOneByte(BL24CXX_TEST_ADDRESS) != BL24CXX_TEST_VALUE); // false = success!
- }
-
- bool BL24CXX::check() {
- if (_check()) { // Value was written? Good EEPROM!
- writeOneByte(BL24CXX_TEST_ADDRESS, BL24CXX_TEST_VALUE); // Write now and check.
- return _check();
- }
- return false; // success!
- }
-
- // Start reading the specified number of data at the specified address in BL24CXX
- // ReadAddr: The address to start reading is 0~255 for 24c02
- // pBuffer: the first address of the data array
- // NumToRead: the number of data to be read
- void BL24CXX::read(uint16_t ReadAddr, uint8_t *pBuffer, uint16_t NumToRead) {
- for (; NumToRead; NumToRead--)
- *pBuffer++ = readOneByte(ReadAddr++);
- }
-
- // Start writing the specified number of data at the specified address in BL24CXX
- // WriteAddr: the address to start writing, 0~255 for 24c02
- // pBuffer: the first address of the data array
- // NumToWrite: the number of data to be written
- void BL24CXX::write(uint16_t WriteAddr, uint8_t *pBuffer, uint16_t NumToWrite) {
- for (; NumToWrite; NumToWrite--, WriteAddr++)
- writeOneByte(WriteAddr, *pBuffer++);
- }
-
- #endif // IIC_BL24CXX_EEPROM
|