Merge pull request #477 from MariaLauraStefanizzi/eeprom

i2c and eeprom drivers for mbxxx boards

examples/eeprom-test/Makefile

@@ -1,5 +1,6 @@
 CONTIKI_PROJECT = eeprom-test
 all: $(CONTIKI_PROJECT)
+TARGET=mbxxx
 
 CONTIKI = ../..
 include $(CONTIKI)/Makefile.include

examples/eeprom-test/eeprom-test.c

@@ -43,32 +43,68 @@
 
 #include <stdio.h>              /* For printf() */
 
+void
+print_content()
+{
+  eeprom_addr_t addr_row = 0, j;
+  uint8_t i;
+  uint8_t byte;
+
+  printf("\t");
+  for(i = 0; i < 16; i++)
+    printf("0x%x\t", i);
+  printf
+    ("\n-----------------------------------------------------------------------------------------------------------------------------------------\n");
+
+  for(addr_row = 0; addr_row < EEPROM_SIZE / 16; ++addr_row) {
+    printf("0x%x\t|", addr_row * 16);
+
+    for(j = 0; j < 16; j++) {
+      eeprom_read(addr_row * 16 + j, &byte, 1);
+      printf("0x%x\t", byte);
+    }
+    printf("\n");
+  }
+}
+
+void
+erase_content()
+{
+  static eeprom_addr_t addr = 0;
+
+  for(addr = 0; addr < EEPROM_SIZE; ++addr) {
+    eeprom_write(addr, 0, 1);
+  }
+}
+
 /*---------------------------------------------------------------------------*/
 PROCESS(eeprom_test_process, "EEPROM Test Process");
 AUTOSTART_PROCESSES(&eeprom_test_process);
 /*---------------------------------------------------------------------------*/
 PROCESS_THREAD(eeprom_test_process, ev, data)
 {
-  static uint8_t counter = 0;
+  static uint8_t counter = 0, error = 0;
-
   static eeprom_addr_t addr = 0;
+  uint8_t byte;
+
+  uint8_t buffer[] =
+    { 0xAA, 0xAA, 0xAA, 0xBB, 0xBB, 0xBB, 0xCC, 0xCC, 0xCC, 0xBB,
+    0xBB, 0xBB, 0xAA, 0xAA, 0xAA, 0xFF, 0xAA, 0xAA, 0xAA, 0xBB,
+    0xBB, 0xBB, 0xCC, 0xCC, 0xCC, 0xBB, 0xBB, 0xBB, 0xAA, 0xAA,
+    0xAA, 0xFF, 0xAA, 0xAA, 0xAA, 0xBB, 0xBB, 0xBB, 0xCC, 0xCC,
+    0xCC, 0xBB, 0xBB, 0xBB, 0xAA, 0xAA, 0xAA, 0xFF
+  };
 
   PROCESS_BEGIN();
 
   printf("eeprom-test: Size = %d bytes\n", EEPROM_SIZE);
 
-  /* Check to see if the EEPROM is empty */
+  print_content();
-  for(addr = 0; addr < EEPROM_SIZE; ++addr) {
-    uint8_t byte;
 
-    eeprom_read(addr, &byte, 1);
+  printf("\nErase EEPROM content\n");
-    if(byte != 0xFF) {
+  erase_content();
-      break;
-    }
-  }
 
-  if(addr == EEPROM_SIZE) {
+  print_content();
-    printf("eeprom-test: EEPROM is empty. Proceding with write test...\n");
 
   counter = 0;
   for(addr = 0; addr < EEPROM_SIZE; ++addr) {
@@ -78,21 +114,43 @@ PROCESS_THREAD(eeprom_test_process, ev, data)
 
   counter = 0;
   for(addr = 0; addr < EEPROM_SIZE; ++addr) {
-      uint8_t byte;
+    byte = 0;
-
     eeprom_read(addr, &byte, 1);
     if(byte != counter) {
-        printf("eeprom-test: EEPROM write failure!\n");
+      error++;
+      eeprom_read(addr, &byte, 1);
+      printf
+        ("eeprom-test: EEPROM write failure! 0x%x =/= 0x%x at address 0x%x\n",
+         byte, counter, addr);
       break;
     }
     counter += 1;
   }
 
+  if(error)
+    printf("eeprom-test: EEPROM write test FAIL!\n%d errors", error);
+  else
     printf("eeprom-test: EEPROM write test success!\n");
-  } else {
-    printf("eeprom-test: EEPROM is NOT empty! Skipping write test.\n");
-  }
 
+
+  print_content();
+
+  printf("Fill memory with buffer\n");
+
+  for(addr = 0; addr < EEPROM_SIZE; addr += sizeof(buffer)) {
+    eeprom_write(addr, ((unsigned char *)buffer), sizeof(buffer));
+  }
+/*
+  printf("Write data buffer %d at address 0x0\n", sizeof(buffer));
+  eeprom_write(0x0, ((unsigned char *)buffer), sizeof(buffer));
+
+  printf("Write data buffer %d at address 0x40\n", sizeof(buffer));
+  eeprom_write(0x40, ((unsigned char *)buffer), sizeof(buffer));
+
+  printf("Write data buffer %d at address 0x95\n", sizeof(buffer));
+  eeprom_write(0x95, ((unsigned char *)buffer), sizeof(buffer));
+*/
+  print_content();
   PROCESS_END();
 }
 /*---------------------------------------------------------------------------*/

platform/mbxxx/Makefile.mbxxx

@@ -1,4 +1,4 @@
-ARCH= irq.c sensors.c acc-sensor.c button-sensor.c temperature-sensor.c mems.c contact-sensor.c
+ARCH= irq.c sensors.c acc-sensor.c button-sensor.c temperature-sensor.c mems.c contact-sensor.c i2c.c eeprom.c
 
 
 CONTIKI_TARGET_DIRS = . dev

platform/mbxxx/board.c

@@ -79,6 +79,7 @@
 #include "hal/micro/cortexm3/mfg-token.h"
 #endif
 #include <string.h>
+#include "dev/i2c.h"
 
 const LedResourceType LedsMB851A[] = {
   {
@@ -522,6 +523,7 @@ void halBoardPowerUp(void)
   if ((boardDescription->flags & BOARD_HAS_MEMS) || (boardDescription->flags & BOARD_HAS_EEPROM)) {
     halGpioConfig(PORTA_PIN(1), GPIOCFG_OUT_ALT_OD);
     halGpioConfig(PORTA_PIN(2), GPIOCFG_OUT_ALT_OD);
+    i2c_enable();
   }
   /* Configure GPIO for ADC access (temp sensor) */
   if (boardDescription->flags & BOARD_HAS_TEMP_SENSOR) {

platform/mbxxx/dev/acc-sensor.c

@@ -57,7 +57,7 @@ static int
 active(void)
 {
   uint8_t reg;
-  if(!i2c_read_reg (kLIS3L02DQ_SLAVE_ADDR,CTRL_REG1, &reg, 1))
+  if(!MEMS_Read_Reg (kLIS3L02DQ_SLAVE_ADDR, CTRL_REG1, &reg, 1))
     return FALSE;
 
   return (reg & 0x40) ? TRUE : FALSE ;
@@ -66,7 +66,6 @@ active(void)
 static int
 value(int type)
 {
-  
   int8_t i2c_data = 0;
   uint8_t reg_addr;
 
@@ -87,15 +86,14 @@ value(int type)
       return 0;
   }
 
-  i2c_read_reg(kLIS3L02DQ_SLAVE_ADDR, reg_addr, (uint8_t *)&i2c_data, 1);
+  MEMS_Read_Reg(kLIS3L02DQ_SLAVE_ADDR, reg_addr, (uint8_t *)&i2c_data, 1);
 
   if(MEMS_GetFullScale()==ACC_HIGH_RANGE){
-    return ((int16_t)i2c_data)*HIGH_RANGE_SENSITIVITY;
+    return ((int16_t)i2c_data) * HIGH_RANGE_SENSITIVITY;
   }
   else {
-    return ((int16_t)i2c_data)*LOW_RANGE_SENSITIVITY;
+    return ((int16_t)i2c_data) * LOW_RANGE_SENSITIVITY;
   }
-
 }
 /*---------------------------------------------------------------------------*/
 static int
@@ -104,7 +102,7 @@ configure(int type, int value)
   switch(type) {
 
     case SENSORS_HW_INIT:
-       return Mems_Init();
+       return MEMS_Init();
 
     case SENSORS_ACTIVE:
       if(value){
@@ -122,10 +120,11 @@ configure(int type, int value)
 
     case ACC_HPF:
       if(value < ACC_HPF_DISABLE){
-        return i2c_write_reg(kLIS3L02DQ_SLAVE_ADDR, CTRL_REG2, (1<<4) | (uint8_t)value);
+        return MEMS_Write_Reg(kLIS3L02DQ_SLAVE_ADDR, CTRL_REG2,
+			      (1<<4) | (uint8_t)value);
       }
       else {
-        return i2c_write_reg(kLIS3L02DQ_SLAVE_ADDR, CTRL_REG2, 0x00);
+        return MEMS_Write_Reg(kLIS3L02DQ_SLAVE_ADDR, CTRL_REG2, 0x00);
       }
   }
   return 0;
@@ -143,10 +142,7 @@ status(int type)
   return 0;
 }
 /*---------------------------------------------------------------------------*/
-SENSORS_SENSOR(acc_sensor, ACC_SENSOR,
+SENSORS_SENSOR(acc_sensor, ACC_SENSOR, value, configure, status);
-	       value, configure, status);
-
-
 
 
 /** @} */

platform/mbxxx/dev/eeprom.c

@@ -0,0 +1,168 @@
+/*
+ * Copyright (c) 2013, IDentification Automation Laboratory
+ * IDALab (http://www.idalab.unisalento.it)
+ * Department of Innovation Engineering - University of Salento
+ *
+ * All rights reserved.
+ * 
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the Institute nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ */
+
+/**
+ * \file  eeprom.c
+ * \brief ST M24C64W EEPROM driver.
+ * \author Maria Laura Stefanizzi <laura28582@gmail.com>
+ * \date   2013-11-20
+ */
+
+#include PLATFORM_HEADER
+#include <dev/eeprom.h>
+#include <dev/i2c.h>
+
+
+#define EE_HW_ADDRESS            0xA0
+#define EE_PAGESIZE              32
+#define EE_PAGEMASK              0x1F
+#define EE_MAX_TRIALS            300
+
+/* Write Cycle polling
+ * 
+ * During the internal Write cycle, the device disconnects itself from the bus,
+ * and writes a copy of the data from its internal latches to the memory cells.
+ */
+static inline void
+eeprom_wait(void)
+{
+  uint32_t trials = 0;
+
+  /* Keep looping till the slave acknowledge his address or maximum number of
+     trials is reached */
+  do {
+    /* Generate start */
+    i2c_start();
+
+    /* Device select in in write mode */
+    i2c_write(EE_HW_ADDRESS | 0x0);
+
+    /* Check if the maximum allowed number of trials has been reached */
+    if(trials++ == EE_MAX_TRIALS) {
+      /* If the maximum number of trials has been reached, exit the function */
+      break;
+    }
+  } while((SC2_STAT(SC_TWIRXNAK)) == SC_TWIRXNAK);
+  /* eeprom reply with an ACK then it has terminated the internal Write cycle */
+
+  i2c_stop();
+}
+
+/**
+ * eeprom initializzation function
+ */
+void
+eeprom_init(void)
+{
+  /* Nothing must be done here */
+}
+
+/**
+ * Write data to eeprom
+ * @param addr The eeprom memory address
+ * @param buf It is the buffer of bytes that will be written to the eeprom
+ * @param size It is the number of byte to write
+ */
+void
+eeprom_write(eeprom_addr_t addr, unsigned char *buf, int size)
+{
+  unsigned int i = 0;
+  unsigned int curaddr;
+
+  curaddr = addr;
+  for(i = 0; i < size; i++) {
+    /* If we are writing the first byte or are on a EE_PAGEMASK page boundary
+       we have to start a new write. */
+    if(i == 0 || (curaddr & EE_PAGEMASK) == 0) {
+
+      i2c_start();
+      i2c_write(EE_HW_ADDRESS | 0x0);
+
+      /* Write the new address to the bus. */
+      i2c_write((curaddr & 0xFF00) >> 8);
+      i2c_write(curaddr & 0xFF);
+    }
+
+    /* Write byte. */
+    i2c_write(buf[i] & 0xFF);
+
+    /* If we are writing the last byte totally or of a 32b page
+       generate a stop condition */
+    if(i == size - 1 || (curaddr & EE_PAGEMASK) == EE_PAGEMASK) {
+      i2c_stop();
+      eeprom_wait();
+    }
+
+    curaddr++;
+  }
+}
+
+/**
+ * Read data from eeprom
+ * @param addr The eeprom memory address
+ * @param buf It is the destination buffer in witch the bytes will be written
+ * @param size It is the number of byte to read
+ */
+void
+eeprom_read(eeprom_addr_t addr, unsigned char *buf, int size)
+{
+  uint8_t i;
+
+  i2c_start();
+
+  /* Select eeprom with write mode bit enabled */
+  i2c_write(EE_HW_ADDRESS | 0x0);
+
+  /* Send address */
+  i2c_write((addr & 0xFF00) >> 8);
+  i2c_write(addr & 0xFF);
+
+  i2c_start();
+
+  /* Select eeprom with write mode bit disabled */
+  i2c_write(EE_HW_ADDRESS | 0x1);
+
+  for(i = 0; i < size; i++) {
+    if(i < (size - 1)) {
+      /* Read data and send ACK */
+      *(buf + i) = i2c_read(1);
+    } else {
+      /* Last data, don't send ACK */
+      *(buf + i) = i2c_read(0);
+    }
+  }
+
+  i2c_stop();
+}
+
+/** @} */

platform/mbxxx/dev/i2c.c

@@ -0,0 +1,136 @@
+/*
+ * Copyright (c) 2013, IDentification Automation Laboratory
+ * IDALab (http://www.idalab.unisalento.it)
+ * Department of Innovation Engineering - University of Salento
+ *
+ * All rights reserved.
+ * 
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the Institute nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ */
+
+/**
+ * \file  i2c.c
+ * \brief I2C bus master driver for mbxxx platform.
+ * \author Maria Laura Stefanizzi <laura28582@gmail.com>
+ * \date   2013-11-20
+ */
+
+#include <stdio.h>
+#include <contiki.h>
+#include "dev/i2c.h"
+#include PLATFORM_HEADER
+
+#define WAIT_FIN_SC2(FLAG) while(!SC2_STAT(FLAG)) {}
+
+/**
+ * Configure serial controller in I2C mode and set I2C speed.
+ */
+void
+i2c_enable(void)
+{
+  /* Configure serial controller to I2C mode */
+  SC2_MODE = SC2_MODE_I2C;
+
+  /* 
+   * The SCL is produced by dividing down 12MHz according to 
+   * this equation:
+   *    Rate = 12 MHz / ( (LIN + 1) * (2^EXP) )
+   * 
+   * Configure rate registers for Fast Mode operation (400 kbps)
+   */
+  SC2_RATELIN = 14;
+  SC2_RATEEXP = 1;
+
+  /* Reset control registers */
+  SC2_TWICTRL1 = SC2_TWICTRL1_RESET;
+  SC2_TWICTRL2 = SC2_TWICTRL2_RESET;
+}
+
+/**
+ * Configure serial controller in disabled mode
+ */
+void
+i2c_disable(void)
+{
+  SC2_MODE = SC2_MODE_DISABLED;
+}
+
+/**
+ * Generate I2C START condition
+ */
+void
+i2c_start(void)
+{
+  SC2_TWICTRL1 |= SC_TWISTART;
+  WAIT_FIN_SC2(SC_TWICMDFIN);
+}
+
+/**
+ * Generate I2C STOP condition
+ */
+void
+i2c_stop(void)
+{
+  SC2_TWICTRL1 |= SC_TWISTOP;
+  WAIT_FIN_SC2(SC_TWICMDFIN);
+}
+
+/**
+ * Send a byte to I2C bus
+ * @param data The data that must be sent
+ */
+void
+i2c_write(uint8_t data)
+{
+  SC2_DATA = data;
+
+  /* Configure control register 1 for byte transmission */
+  SC2_TWICTRL1 |= SC_TWISEND;
+  WAIT_FIN_SC2(SC_TWITXFIN);
+}
+
+/**
+ * Read a byte from I2C bus
+ * @param ack If true enable ACK generation after byte reception
+ * @return The received byte
+ */
+uint8_t
+i2c_read(int ack)
+{
+  if(ack) {
+    /* Enable ACK generation after current received byte */
+    SC2_TWICTRL2 |= SC_TWIACK;
+  } else {
+    /* Disable ACK generation */
+    SC2_TWICTRL2 &= ~SC_TWIACK;
+  }
+
+  /* Configure control register 1 for byte reception */
+  SC2_TWICTRL1 |= SC_TWIRECV;
+  WAIT_FIN_SC2(SC_TWIRXFIN);
+
+  return SC2_DATA;
+}

platform/mbxxx/dev/i2c.h

@@ -0,0 +1,54 @@
+/*
+ * Copyright (c) 2013, IDentification Automation Laboratory
+ * IDALab (http://www.idalab.unisalento.it)
+ * Department of Innovation Engineering - University of Salento
+ *
+ * All rights reserved.
+ * 
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the Institute nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ */
+
+/**
+ * \file  i2c.h
+ * \brief I2C bus master driver for mbxxx platform.
+ * \author Maria Laura Stefanizzi <laura28582@gmail.com>
+ * \date   2013-11-20
+ */
+#ifndef I2C_H
+#define I2C_H
+
+#define SC2_STAT(FLAG) (SC2_TWISTAT & FLAG)
+
+void i2c_enable(void);
+void i2c_disable(void);
+void i2c_start(void);
+void i2c_stop(void);
+
+void i2c_write(uint8_t data);
+uint8_t i2c_read(int ack);
+
+#endif /* I2C_H */
+

platform/mbxxx/dev/mems.c

@@ -23,205 +23,19 @@
 #include PLATFORM_HEADER
 #include "mems.h"
 #include "timer.h"
+#include "i2c.h"
 
 /* Private define -- ---------------------------------------------------------*/
-
-#define TIMEOUT 20000
-
 #define SUCCESS 1
 #define FAIL    0
 
-#define SEND_BYTE(data) do{ SC2_DATA=(data); SC2_TWICTRL1 |= SC_TWISEND; }while(0)
-
-#define WAIT_CMD_FIN()  {                                                       \
-                          struct timer t;                                       \
-                          timer_set(&t, CLOCK_SECOND/100);                      \
-                          while((SC2_TWISTAT&SC_TWICMDFIN)!=SC_TWICMDFIN){      \
-                            if(timer_expired(&t)){                              \
-                            return FAIL;                                        \
-                           }                                                    \
-                          }                                                     \
-                        }
-
-#define WAIT_TX_FIN()   {                                                       \
-                          struct timer t;                                       \
-                          timer_set(&t, CLOCK_SECOND/100);                      \
-                          while((SC2_TWISTAT&SC_TWITXFIN)!=SC_TWITXFIN){        \
-                            if(timer_expired(&t)){                              \
-                            return FAIL;                                        \
-                           }                                                    \
-                          }                                                     \
-                        }
-#define WAIT_RX_FIN()    {                                                      \
-                          struct timer t;                                       \
-                          timer_set(&t, CLOCK_SECOND/100);                      \
-                          while((SC2_TWISTAT&SC_TWIRXFIN)!=SC_TWIRXFIN){        \
-                            if(timer_expired(&t)){                              \
-                            return FAIL;                                        \
-                           }                                                    \
-                          }                                                     \
-                        }
-
 /* Private variables ---------------------------------------------------------*/
 static boolean fullscale_state;
 
-/* Private functions ---------------------------------------------------------*/
-static uint8_t I2C_MEMS_Init (void);
-//extern void halInternalResetWatchDog(void);
-static uint8_t I2C_Send_Frame (uint8_t DeviceAddress, uint8_t *pBuffer, uint8_t NoOfBytes);
-uint8_t i2c_write_reg (uint8_t slave_addr, uint8_t reg_addr, uint8_t reg_value);
-//static uint8_t I2C_MEMS_Read (t_mems_data *mems_data);
-
 /* Functions -----------------------------------------------------------------*/
 
 /*******************************************************************************
-* Function Name  : Mems_Init
+* Function Name  : MEMS_Write_Reg
-* Description    : It inits mems 
-* Input          : None
-* Output         : status
-* Return         : None
-*******************************************************************************/
-uint8_t Mems_Init(void)
-{  
-  uint8_t ret = 0;
-  
-  // GPIO assignments
-  // PA1: SC2SDA (Serial Data)
-  // PA2: SC2SCL (Serial Clock)
-
-  //-----SC2 I2C Master GPIO configuration
-
-  TIM2_CCER &= 0xFFFFEEEE;
-  SC2_MODE =  SC2_MODE_I2C;
-  GPIO_PACFGL &= 0xFFFFF00F;
-  GPIO_PACFGL |= 0x00000DD0;
-  
-  SC2_RATELIN =  14;   // generates standard 100kbps or 400kbps
-  SC2_RATEEXP =  1;    // 3 yields 100kbps; 1 yields 400kbps
-  SC2_TWICTRL1 =  0;   // start from a clean state
-  SC2_TWICTRL2 =  0;   // start from a clean state  
-  
-  ret = I2C_MEMS_Init();
-  
-  fullscale_state = MEMS_LOW_RANGE;
-
-//Add later if really needed  
-#ifdef ST_DBG  
-  if (!ret)
-   I2C_DeInit(MEMS_I2C);
-#endif
-  
-  return ret;
-}/* end Mems_Init */
-
-/*******************************************************************************
-* Function Name  : Mems_GetValue
-* Description    : It returns the 3 mems acceleration values related to x,y,z 
-*                  axes in mems_data
-* Input          : mems_data
-* Output         : status
-* Return         : None
-*******************************************************************************/
-//uint8_t Mems_GetValue(t_mems_data *mems_data)
-//{
-//  uint8_t i; 
-//  i = I2C_MEMS_Read(mems_data);   
-//  return i;
-//}
-
-
-/* Private Functions ---------------------------------------------------------*/
-
-/*******************************************************************************
-* Function Name  : I2C_Send_Frame
-* Description    : It sends I2C frame 
-* Input          : DeviceAddress is the destination device address
-*                  pBUffer is the buffer data
-*                  NoOfBytes is the number of bytes
-* Output         : None
-* Return         : 1 if the frame has been successfully sent, 0 otherwise.
-*******************************************************************************/
-static uint8_t I2C_Send_Frame (uint8_t DeviceAddress, uint8_t *pBuffer, uint8_t NoOfBytes)
-{
-  uint8_t i, data;
-
-  SC2_TWICTRL1 |= SC_TWISTART;   // send start
-  WAIT_CMD_FIN();
-  
-  SEND_BYTE(DeviceAddress);   // send the address low byte
-  WAIT_TX_FIN();
-  
-   // loop sending the data
-  for (i=0; i<NoOfBytes; i++) {
-    halInternalResetWatchDog();
-    
-    data = *(pBuffer+i);
-        
-    SEND_BYTE(data);
-    
-    WAIT_TX_FIN();
-  }
-
-  SC2_TWICTRL1 |= SC_TWISTOP;
-  WAIT_CMD_FIN();
-  
-  return SUCCESS;
-}/* end I2C_Send_Frame() */
-
-/*******************************************************************************
-* Function Name  : I2C_Receive_Frame
-* Description    : It receives an I2C frame and stores it in pBUffer parameter
-* Input          : slave_addr is the slave address
-*                  reg_addr is the register address
-*                  NoOfBytes is the numenr of bytes to read starting from reg_addr
-* Output         : I2C frame in pBUffer
-* Return         : 1 if the frame has been successfully received, 0 otherwise.
-*******************************************************************************/
-static uint8_t I2C_Receive_Frame (uint8_t slave_addr, uint8_t reg_addr, uint8_t *pBuffer, uint8_t NoOfBytes)
-{
-  uint8_t i, addr = reg_addr;
-  
-  if (NoOfBytes > 1)
-    addr += REPETIR;
-  
-  SC2_TWICTRL1 |= SC_TWISTART;   // send start
-  WAIT_CMD_FIN();
-   
-  SEND_BYTE(slave_addr | 0x00);      // send the address low byte
-  WAIT_TX_FIN();
-  
-  SEND_BYTE(addr);
-  WAIT_TX_FIN();
-
-  SC2_TWICTRL1 |= SC_TWISTART;     // send start
-  WAIT_CMD_FIN();
-  
-  SEND_BYTE(slave_addr | 0x01);      // send the address low byte
-  WAIT_TX_FIN();
- 
-  // loop receiving the data
-  for (i=0;i<NoOfBytes;i++){
-    halInternalResetWatchDog();
-
-    if (i < (NoOfBytes - 1))
-      SC2_TWICTRL2 |= SC_TWIACK;   // ack on receipt of data
-    else
-      SC2_TWICTRL2 &= ~SC_TWIACK;  // don't ack if last one
-
-    SC2_TWICTRL1 |= SC_TWIRECV;    // set to receive
-    WAIT_RX_FIN();
-    *(pBuffer+i) = SC2_DATA;       // receive data
-  }
-
-  SC2_TWICTRL1 |= SC_TWISTOP;      // send STOP
-  WAIT_CMD_FIN();  
-
-  return SUCCESS;
-}/* end I2C_Receive_Frame() */
-
-
-/*******************************************************************************
-* Function Name  : i2c_write_reg
 * Description    : It writes a register on the I2C target
 * Input          : slave addr is the I2C target device
 *                  reg_addr is the address of the register to be written
@@ -229,18 +43,27 @@ static uint8_t I2C_Receive_Frame (uint8_t slave_addr, uint8_t reg_addr, uint8_t
 * Output         : None
 * Return         : 1 if the register has been successfully written, 0 otherwise.
 *******************************************************************************/
-uint8_t i2c_write_reg (uint8_t slave_addr, uint8_t reg_addr, uint8_t reg_value)
+uint8_t
+MEMS_Write_Reg (uint8_t slave_addr, uint8_t reg_addr, uint8_t reg_value)
 {
-  uint8_t i2c_buffer[2];
+  i2c_start();
 
-  i2c_buffer[0] = reg_addr;
+  /* send the address low byte */
-  i2c_buffer[1] = reg_value;
+  i2c_write(slave_addr);
 
-  return I2C_Send_Frame (slave_addr, i2c_buffer, 2);
+  /* send register address */
-}/* end i2c_write_reg() */
+  i2c_write(reg_addr);
+
+  /* send register value */
+  i2c_write(reg_value);
+
+  i2c_stop();
+
+  return SUCCESS;
+}/* end MEMS_Write_Reg() */
 
 /*******************************************************************************
-* Function Name  : i2c_read_reg
+* Function Name  : MEMS_Read_Reg
 * Description    : It reads  a register on the I2C target
 * Input          : slave addr is the I2C target device
 *                  reg_addr is the address of the register to be read
@@ -249,37 +72,66 @@ uint8_t i2c_write_reg (uint8_t slave_addr, uint8_t reg_addr, uint8_t reg_value)
 * Output         : I2C frame
 * Return         : 1 if the register has been successfully read, 0 otherwise.
 *******************************************************************************/
-uint8_t i2c_read_reg (uint8_t slave_addr, uint8_t reg_addr, uint8_t *pBuffer, uint8_t NoOfBytes)
+uint8_t
+MEMS_Read_Reg (uint8_t slave_addr, uint8_t reg_addr, uint8_t *pBuffer,
+		      uint8_t NoOfBytes)
 {
-  return I2C_Receive_Frame (slave_addr, reg_addr, pBuffer, NoOfBytes);
+  uint8_t i, ack, addr = reg_addr;
-}/* end i2c_read_reg() */
+
+  if (NoOfBytes > 1)
+    addr += REPETIR;
+
+  i2c_start();
+
+  /* send the address low byte */
+  i2c_write(slave_addr | 0x00);
+
+  i2c_write(addr);
+
+  i2c_start();
+
+  /* send the address low byte */
+  i2c_write(slave_addr | 0x01);
+
+  /* loop receiving the data */
+  for (i = 0; i < NoOfBytes; i++){
+
+    if (i < (NoOfBytes - 1))
+      /* ack on receipt of data */
+      ack = 1;
+    else
+      /* don't ack if last one */
+      ack = 0;
+
+    /* receive data */
+    *(pBuffer+i) = i2c_read(ack);
+  }
+
+  i2c_stop();
+
+  return SUCCESS;
+}/* end MEMS_Read_Reg() */
 
 /*******************************************************************************
-* Function Name  : I2C_MEMS_Init
+* Function Name  : MEMS_Init
-* Description    : It performs basic MEMS register writes for initialization 
+* Description    : It inits mems 
-*                  purposes
 * Input          : None
-* Output         : None
+* Output         : status
-* Return         : 1 if the device has been successfully initialized, 0 otherwise.
+* Return         : None
 *******************************************************************************/
-static uint8_t I2C_MEMS_Init (void)
+uint8_t
+MEMS_Init(void)
 {
-  uint8_t i = 0;
+  TIM2_CCER &= 0xFFFFEEEE;
-
+  MEMS_Write_Reg (kLIS3L02DQ_SLAVE_ADDR, STATUS_REG, 0x00);    //no flag
-  i += i2c_write_reg (kLIS3L02DQ_SLAVE_ADDR, STATUS_REG, 0x00);    //no flag
+  MEMS_Write_Reg (kLIS3L02DQ_SLAVE_ADDR, FF_WU_CFG, 0x00);     // all off
-  i += i2c_write_reg (kLIS3L02DQ_SLAVE_ADDR, FF_WU_CFG, 0x00);     // all off
+  MEMS_Write_Reg (kLIS3L02DQ_SLAVE_ADDR, DD_CFG, 0x00);        // all off
-  i += i2c_write_reg (kLIS3L02DQ_SLAVE_ADDR, DD_CFG, 0x00);        // all off
+  MEMS_Write_Reg (kLIS3L02DQ_SLAVE_ADDR, CTRL_REG2, 0x00);
-  //i += i2c_write_reg (kLIS3L02DQ_SLAVE_ADDR, CTRL_REG2, (1<<4) | (1<<1) | (1 << 0));
+  MEMS_Write_Reg (kLIS3L02DQ_SLAVE_ADDR, CTRL_REG1, 0x87);  
-  
+  fullscale_state = MEMS_LOW_RANGE;
-  i += i2c_write_reg (kLIS3L02DQ_SLAVE_ADDR, CTRL_REG2, 0x00);
-  //i += i2c_write_reg (kLIS3L02DQ_SLAVE_ADDR, CTRL_REG1, 0xC7);
-  i += i2c_write_reg (kLIS3L02DQ_SLAVE_ADDR, CTRL_REG1, 0x87);  
-
-  if (i != 5)
-    return 0;
 
   return 1;
-}/* end I2C_MEMS_Init() */
+}/* end MEMS_Init */
 
 /*******************************************************************************
 * Function Name  : I2C_MEMS_On
@@ -288,21 +140,23 @@ static uint8_t I2C_MEMS_Init (void)
 * Output         : None
 * Return         : 1 if the device has been successfully set to normal mode, 0 otherwise.
 *******************************************************************************/
-uint8_t MEMS_On (void)
+uint8_t
+MEMS_On (void)
 {
-  return i2c_write_reg (kLIS3L02DQ_SLAVE_ADDR, CTRL_REG1, 0xC7);  
+  return MEMS_Write_Reg (kLIS3L02DQ_SLAVE_ADDR, CTRL_REG1, 0xC7);
 }
 
 /*******************************************************************************
-* Function Name  : I2C_MEMS_Off
+* Function Name  : MEMS_Off
 * Description    : It turn off the device. 
 * Input          : None
 * Output         : None
 * Return         : 1 if the device has been successfully set to power-down mode, 0 otherwise.
 *******************************************************************************/
-uint8_t MEMS_Off (void)
+uint8_t
+MEMS_Off (void)
 {
-  return i2c_write_reg (kLIS3L02DQ_SLAVE_ADDR, CTRL_REG1, 0x87);  
+  return MEMS_Write_Reg (kLIS3L02DQ_SLAVE_ADDR, CTRL_REG1, 0x87);
 }
 
 /*******************************************************************************
@@ -312,12 +166,12 @@ uint8_t MEMS_Off (void)
 * Output         : None
 * Return         : 1 if the device has been successfully set to full scale mode, 0 otherwise.
 *******************************************************************************/
-uint8_t MEMS_SetFullScale (boolean range)
+uint8_t
+MEMS_SetFullScale (boolean range)
 {
   uint8_t i2c_buffer;
 
-  if(!i2c_read_reg(kLIS3L02DQ_SLAVE_ADDR, CTRL_REG1, &i2c_buffer, 1))
+  MEMS_Read_Reg(kLIS3L02DQ_SLAVE_ADDR, CTRL_REG1, &i2c_buffer, 1);
-    return 0;
 
   if(range==MEMS_HIGH_RANGE){
     i2c_buffer |= 0x20;
@@ -326,49 +180,26 @@ uint8_t MEMS_SetFullScale (boolean range)
     i2c_buffer &= ~0x20;
   }
 
-  if(!i2c_write_reg(kLIS3L02DQ_SLAVE_ADDR, CTRL_REG1, i2c_buffer))
+  MEMS_Write_Reg(kLIS3L02DQ_SLAVE_ADDR, CTRL_REG1, i2c_buffer);
-    return 0;
 
   fullscale_state = range;
 
   return 1;
-  
 }
 
 /*******************************************************************************
-* Function Name  : I2C_MEMS_GetFullScale
+* Function Name  : MEMS_GetFullScale
 * Description    : It get the full-scale range of the device. 
 * Input          : None
 * Output         : None
 * Return         : range  HIGH for high scale selection, LOW for low range.
 *******************************************************************************/
-boolean MEMS_GetFullScale (void)
+boolean
+MEMS_GetFullScale (void)
 {
   return fullscale_state;  
 }
 
-/*******************************************************************************
-* Function Name  : I2C_MEMS_Read
-* Description    : It reads 3 axes acceleration data from mems
-* Input          : None
-* Output         : mems_data
-* Return         : 1 if acceleration data has been successfully read, 0 otherwise
-*******************************************************************************/
-//static uint8_t I2C_MEMS_Read (t_mems_data *mems_data)
-//{
-//  uint8_t i, i2c_buffer[8];
-//
-//  i = i2c_read_reg (kLIS3L02DQ_SLAVE_ADDR, OUTX_L, i2c_buffer, 8);  
-//
-//  mems_data->outx_h = i2c_buffer[0];
-//  mems_data->outx_l = i2c_buffer[1];
-//  mems_data->outy_h = i2c_buffer[2];
-//  mems_data->outy_l = i2c_buffer[3];
-//  mems_data->outz_h = i2c_buffer[4];
-//  mems_data->outz_l = i2c_buffer[5];
-//
-//  return i;
-//}/* end I2C_MEMS_Read() */
-
 /******************* (C) COPYRIGHT 2009 STMicroelectronics *****END OF FILE****/
 /** @} */
+

platform/mbxxx/dev/mems.h

@@ -49,17 +49,19 @@ typedef struct {
 /* Functions -----------------------------------------------------------------*/
 
 /* Mems Initialization function */
-uint8_t Mems_Init(void);
+uint8_t MEMS_Init(void);
 
 uint8_t MEMS_On(void);
 uint8_t MEMS_Off(void);
 uint8_t MEMS_SetFullScale(boolean range);
 boolean MEMS_GetFullScale(void);
-
+uint8_t MEMS_Read_Reg (uint8_t slave_addr, uint8_t reg_addr, uint8_t *pBuffer,
-/* Get mems acceleration values */
+		       uint8_t NoOfBytes);
-uint8_t Mems_GetValue(t_mems_data *mems_data);
+uint8_t MEMS_Write_Reg (uint8_t slave_addr, uint8_t reg_addr,
+			uint8_t reg_value);
 
 #endif /*MEMS_H_ */
 
 /******************* (C) COPYRIGHT 2009 STMicroelectronics *****END OF FILE****/
 /** @} */
+

platform/mbxxx/platform-conf.h

@@ -84,6 +84,7 @@ typedef unsigned long clock_time_t;
 #define CLOCK_CONF_SECOND 1000
 
 typedef unsigned long rtimer_clock_t;
+
 #define RTIMER_CLOCK_LT(a,b)     ((signed short)((a)-(b)) < 0)
 
 #define LEDS_CONF_RED_PIN     boardDescription->io->leds[1].gpioPin
@@ -97,6 +98,7 @@ typedef unsigned long rtimer_clock_t;
 #define UIP_ARCH_CHKSUM          0
 
 #define UIP_CONF_BYTE_ORDER      UIP_LITTLE_ENDIAN
+#define EEPROM_CONF_SIZE	8000
 
 #endif /* PLATFORM_CONF_H_ */
 /** @} */