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Merge pull request #477 from MariaLauraStefanizzi/eeprom

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i2c and eeprom drivers for mbxxx boards
This commit is contained in:
Mariano Alvira 2013-12-02 09:20:14 -08:00
commit 590b3f48a9
11 changed files with 579 additions and 329 deletions
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1
examples/eeprom-test/Makefile
View file

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

118
examples/eeprom-test/eeprom-test.c
View file

@ -43,56 +43,114 @@
#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 */
for(addr = 0; addr < EEPROM_SIZE; ++addr) {
uint8_t byte;
print_content();
printf("\nErase EEPROM content\n");
erase_content();
print_content();
counter = 0;
for(addr = 0; addr < EEPROM_SIZE; ++addr) {
eeprom_write(addr, &counter, 1);
counter += 1;
}
counter = 0;
for(addr = 0; addr < EEPROM_SIZE; ++addr) {
byte = 0;
eeprom_read(addr, &byte, 1);
if(byte != 0xFF) {
if(byte != counter) {
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(addr == EEPROM_SIZE) {
printf("eeprom-test: EEPROM is empty. Proceding with write test...\n");
counter = 0;
for(addr = 0; addr < EEPROM_SIZE; ++addr) {
eeprom_write(addr, &counter, 1);
counter += 1;
}
counter = 0;
for(addr = 0; addr < EEPROM_SIZE; ++addr) {
uint8_t byte;
eeprom_read(addr, &byte, 1);
if(byte != counter) {
printf("eeprom-test: EEPROM write failure!\n");
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();
}
/*---------------------------------------------------------------------------*/

2
platform/mbxxx/Makefile.mbxxx
View file

@ -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

2
platform/mbxxx/board.c
View file

@ -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) {

60
platform/mbxxx/dev/acc-sensor.c
View file

@ -57,55 +57,53 @@ 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 ;
}
/*---------------------------------------------------------------------------*/
static int
value(int type)
{
int8_t i2c_data = 0;
uint8_t reg_addr;
switch(type) {
case ACC_X_AXIS:
reg_addr = OUTX_H;
break;
case ACC_Y_AXIS:
reg_addr = OUTY_H;
break;
case ACC_Z_AXIS:
reg_addr = OUTZ_H;
break;
default:
return 0;
}
i2c_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;
}
else {
return ((int16_t)i2c_data)*LOW_RANGE_SENSITIVITY;
return 0;
}
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;
}
else {
return ((int16_t)i2c_data) * LOW_RANGE_SENSITIVITY;
}
}
/*---------------------------------------------------------------------------*/
static int
configure(int type, int value)
{
switch(type) {
case SENSORS_HW_INIT:
return Mems_Init();
return MEMS_Init();
case SENSORS_ACTIVE:
if(value){
if(MEMS_On()){
@ -115,17 +113,18 @@ configure(int type, int value)
return 0;
}
else
return MEMS_Off();
return MEMS_Off();
case ACC_RANGE:
return MEMS_SetFullScale((boolean)value);
case ACC_HPF:
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;
@ -135,18 +134,15 @@ static int
status(int type)
{
switch(type) {
case SENSORS_READY:
return active();
}
return 0;
}
/*---------------------------------------------------------------------------*/
SENSORS_SENSOR(acc_sensor, ACC_SENSOR,
value, configure, status);
SENSORS_SENSOR(acc_sensor, ACC_SENSOR, value, configure, status);
/** @} */

168
platform/mbxxx/dev/eeprom.c Normal file
View file

@ -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();
}
/** @} */

136
platform/mbxxx/dev/i2c.c Normal file
View file

@ -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;
}

54
platform/mbxxx/dev/i2c.h Normal file
View file

@ -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 */

353
platform/mbxxx/dev/mems.c
View file

@ -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; \
} \
} \
}
#define FAIL 0
/* 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
* 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
* Function Name : MEMS_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_buffer[0] = reg_addr;
i2c_buffer[1] = reg_value;
i2c_start();
return I2C_Send_Frame (slave_addr, i2c_buffer, 2);
}/* end i2c_write_reg() */
/* send the address low byte */
i2c_write(slave_addr);
/* send register address */
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);
}/* end i2c_read_reg() */
uint8_t i, ack, addr = reg_addr;
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
* Description : It performs basic MEMS register writes for initialization
* purposes
* Function Name : MEMS_Init
* Description : It inits mems
* Input : None
* Output : None
* Return : 1 if the device has been successfully initialized, 0 otherwise.
* Output : status
* Return : None
*******************************************************************************/
static uint8_t I2C_MEMS_Init (void)
uint8_t
MEMS_Init(void)
{
uint8_t i = 0;
i += i2c_write_reg (kLIS3L02DQ_SLAVE_ADDR, STATUS_REG, 0x00); //no flag
i += i2c_write_reg (kLIS3L02DQ_SLAVE_ADDR, FF_WU_CFG, 0x00); // all off
i += i2c_write_reg (kLIS3L02DQ_SLAVE_ADDR, DD_CFG, 0x00); // all off
//i += i2c_write_reg (kLIS3L02DQ_SLAVE_ADDR, CTRL_REG2, (1<<4) | (1<<1) | (1 << 0));
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;
TIM2_CCER &= 0xFFFFEEEE;
MEMS_Write_Reg (kLIS3L02DQ_SLAVE_ADDR, STATUS_REG, 0x00); //no flag
MEMS_Write_Reg (kLIS3L02DQ_SLAVE_ADDR, FF_WU_CFG, 0x00); // all off
MEMS_Write_Reg (kLIS3L02DQ_SLAVE_ADDR, DD_CFG, 0x00); // all off
MEMS_Write_Reg (kLIS3L02DQ_SLAVE_ADDR, CTRL_REG2, 0x00);
MEMS_Write_Reg (kLIS3L02DQ_SLAVE_ADDR, CTRL_REG1, 0x87);
fullscale_state = MEMS_LOW_RANGE;
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);
}
/*******************************************************************************
@ -312,13 +166,13 @@ 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))
return 0;
MEMS_Read_Reg(kLIS3L02DQ_SLAVE_ADDR, CTRL_REG1, &i2c_buffer, 1);
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))
return 0;
MEMS_Write_Reg(kLIS3L02DQ_SLAVE_ADDR, CTRL_REG1, i2c_buffer);
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****/
/** @} */

10
platform/mbxxx/dev/mems.h
View file

@ -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);
/* Get mems acceleration values */
uint8_t Mems_GetValue(t_mems_data *mems_data);
uint8_t MEMS_Read_Reg (uint8_t slave_addr, uint8_t reg_addr, uint8_t *pBuffer,
uint8_t NoOfBytes);
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****/
/** @} */

4
platform/mbxxx/platform-conf.h
View file

@ -54,7 +54,7 @@
#include PLATFORM_HEADER
#include <inttypes.h>
#include <string.h> // For memcpm().
#include <string.h> // For memcpm().
/* Platform-dependent definitions */
#define CC_CONF_REGISTER_ARGS 0
@ -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_ */
/** @} */