Revision 0:f7119e0aa405, committed 2017-04-22

Comitter:

MACRUM

Date:

Sat Apr 22 12:14:35 2017 +0000

Child:

1:b4cd8ba57300

Commit message:

Initial commit;

Changed in this revision

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/MB85RCxx_I2C.cpp	Sat Apr 22 12:14:35 2017 +0000
@@ -0,0 +1,101 @@
+/**
+ ******************************************************************************
+ * @file    MB85RCxx_I2C.cpp
+ * @author  Toyomasa Watarai
+ * @version V1.0.0
+ * @date    22 April 2017
+ * @brief   MB85RCxx_I2C class implementation
+ ******************************************************************************
+ * @attention
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+#include "mbed.h"
+#include "MB85RCxx_I2C.h"
+
+MB85RCxx_I2C::MB85RCxx_I2C(PinName sda, PinName scl, char slave_adr)
+    :
+    _i2c_p(new I2C(sda, scl)), 
+    _i2c(*_i2c_p),
+    _address(slave_adr)
+{
+    _i2c.frequency(400000);
+}
+
+MB85RCxx_I2C::~MB85RCxx_I2C()
+{
+    if (NULL != _i2c_p)
+        delete  _i2c_p;
+}
+
+int MB85RCxx_I2C::read_device_id(char* device_id)
+{
+    _i2c.write(0xF8, &_address, 1, true);
+    _i2c.read(0xF9, device_id, 3);
+    
+    return (device_id[1] & 0x0F);
+}
+
+void MB85RCxx_I2C::read(uint32_t address, char *data, uint32_t length)
+{
+    char byte_address[2];
+    char i2c_adrs = (_address | ((address >> 15) & 0x02));
+    
+    byte_address[0] = ((address >> 8) & 0xFF);
+    byte_address[1] = ((address >> 0) & 0xFF);
+    _i2c.write(i2c_adrs, byte_address, 2, true);
+    _i2c.read(i2c_adrs, data, length);
+}
+
+void MB85RCxx_I2C::write(uint32_t address, char *data, uint32_t length)
+{
+    char byte_address[2];
+    char i2c_adrs = (_address | ((address >> 15) & 0x02));
+    
+    byte_address[0] = ((address >> 8) & 0xFF);
+    byte_address[1] = ((address >> 0) & 0xFF);
+    _i2c.write(i2c_adrs, byte_address, 2, true);
+    for (uint32_t i = 0; i < length; i++) {
+        _i2c.write(*data++);
+    }
+}
+
+void MB85RCxx_I2C::write(uint32_t address, char data)
+{
+    char byte_address[2];
+    char i2c_adrs = (_address | ((address >> 15) & 0x02));
+    
+    byte_address[0] = ((address >> 8) & 0xFF);
+    byte_address[1] = ((address >> 0) & 0xFF);
+    _i2c.write(i2c_adrs, byte_address, 2, true);
+    _i2c.write(data);
+}
+
+void MB85RCxx_I2C::fill(uint32_t address, uint8_t data, uint32_t length)
+{
+    char byte_address[2];
+    char i2c_adrs = (_address | ((address >> 15) & 0x02));
+    
+    byte_address[0] = ((address >> 8) & 0xFF);
+    byte_address[1] = ((address >> 0) & 0xFF);
+    _i2c.write(i2c_adrs, byte_address, 2, true);
+    for (uint32_t i = 0; i < length; i++) {
+        _i2c.write(data);
+    }
+}

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/MB85RCxx_I2C.h	Sat Apr 22 12:14:35 2017 +0000
@@ -0,0 +1,154 @@
+/**
+ ******************************************************************************
+ * @file    MB85RCxx_I2C.h
+ * @author  Toyomasa Watarai
+ * @version V1.0.0
+ * @date    22 April 2017
+ * @brief   This file contains the class of an MB85RCxx FRAM library with I2C interface
+ ******************************************************************************
+ * @attention
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+ 
+#ifndef MBED_MB85RCxx_I2C_H
+#define MBED_MB85RCxx_I2C_H
+
+ #include "mbed.h"
+ 
+ /**  Interface for accessing Fujitsu MB85RCxx FRAM
+ *
+ * @code
+ * #include "mbed.h"
+ * #include "MB85RCxx_I2C.h"
+ * 
+ * Serial pc(USBTX, USBRX);
+ * 
+ * #if defined(TARGET_LPC1768)
+ * MB85RCxx_I2C fram(p28, p27);
+ * #else
+ * MB85RCxx_I2C fram(D14, D15);
+ * #endif
+ * 
+ * int main()
+ * {
+ *     char buf[16];
+ *     uint32_t address;
+ *     
+ *     fram.fill(0, 0, 256);
+ * 
+ *     for (int i = 0; i < 16; i++) {
+ *         buf[i] = i;
+ *     }
+ *     fram.write(0, buf, 16);
+ * 
+ *     for (address = 0; address < 0x80; address += 16) {
+ *         fram.read(address, buf, 16);
+ *         pc.printf("%08X : ", address);
+ *         for (int i = 0; i < 16; i++) {
+ *             pc.printf("%02X ", buf[i]);    
+ *         }
+ *         pc.printf("\n");
+ *     }
+ * }
+ * 
+ * @endcode
+ */
+
+#define MB85_DENSITY_64K    0x3
+#define MB85_DENSITY_256K   0x5
+#define MB85_DENSITY_512K   0x6
+#define MB85_DENSITY_1M     0x7
+#define MB85_DENSITY_2M     0x8
+#define MB85RC_I2C_ADDRESS  0xA0
+#define I2C_WRITE           0
+#define I2C_READ            1
+
+/** MB85RCxx_I2C class
+ *
+ *  MB85RCxx_I2C: A library to access Fujitsu MB85RCxx_I2C FRAM
+ *
+ */ 
+class MB85RCxx_I2C
+{
+public:
+
+    /** Create an MB85RCxx_I2C instance
+     *  which is connected to specified I2C pins with specified address
+     *
+     * @param sda I2C data line pin
+     * @param scl I2C clock line pin
+     * @param slave_adr (option) I2C slave address (default: 0xA0)
+     */
+    MB85RCxx_I2C(PinName sda, PinName scl, char slave_adr = MB85RC_I2C_ADDRESS);
+
+    /** Destructor of MB85RCxx_I2C
+     */
+    virtual ~MB85RCxx_I2C();
+
+    /** Read device ID from MB85RCxx FRAM
+     *
+     * @param device_id Pointer to the byte-array to read data in to
+     *
+     * @returns memory dencity
+     */
+    int read_device_id(char* device_id);
+    
+    /** Read data from memory address
+     *
+     * @param address Memory address
+     * @param data Pointer to the byte-array to read data in to
+     * @param length Number of bytes to read
+     *
+     */
+    void read(uint32_t address, char *data, uint32_t length);
+
+    /** Write data to memory address
+     *
+     * @param address Memory address
+     * @param data Pointer to the byte-array data to write
+     * @param length Number of bytes to write
+     *
+     */
+    void write(uint32_t address, char *data, uint32_t length);
+
+    /** Write data to memory address
+     *
+     * @param address Memory address
+     * @param data data to write out to memory
+     *
+     */
+    void write(uint32_t address, char data);
+
+    /** Fill data to memory address
+     *
+     * @param address Memory address
+     * @param data data to fill out to memory
+     * @param length Number of bytes to write
+     *
+     */
+    void fill(uint32_t address, uint8_t data, uint32_t length);
+
+private:
+    I2C         *_i2c_p;
+    I2C         &_i2c;
+    char        _address;
+};
+
+#endif