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add examples

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pvvx 2016-12-14 04:21:37 +03:00
parent 265d41b6a3
commit 4128624f93
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7
RTL00_SDKV35a/example_sources/i2c_LPS25HB_pressure/readme.txt Normal file
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Example Description
this example is use to measure atmos
work with arduino extended board, which has pressure sensor
the terminal will feedback real pressure value which is represented in Pa

183
RTL00_SDKV35a/example_sources/i2c_LPS25HB_pressure/src/main.c Normal file
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#include "device.h"
#include "PinNames.h"
#include "basic_types.h"
#include "diag.h"
#include "osdep_api.h"
#include "i2c_api.h"
#include "pinmap.h"
//#include "rtl_lib.h"
#include "main.h"
#define MBED_I2C_MTR_SDA PB_3
#define MBED_I2C_MTR_SCL PB_2
#define MBED_I2C_INTB PA_5
#define MBED_I2C_SLAVE_ADDR0 0x5D
#define MBED_I2C_BUS_CLK 40000 //hz
#define I2C_DATA_MAX_LENGTH 20
#define malloc pvPortMalloc
#define free vPortFree
uint8_t i2cdata_write[I2C_DATA_MAX_LENGTH];
uint8_t i2cdata_read[I2C_DATA_MAX_LENGTH];
uint16_t cmd;
i2c_t i2cmaster;
int count = 0;
//sensor command
#define SENSOR_START 0x20A0
#define FIFO 0x2E41
#define REBOOT 0x2110
#define READ 0x2101
#define BYPASS 0x2E00
char i2cdatasrc[9] = {0x27, 0x28, 0x29, 0x2A};
//char i2cdatasrc[7] = {0x40, 0x48, 0x50, 0x27, 0x28, 0x29, 0x2A};
static void ePL_WriteCommand(uint16_t cmd)
{
i2cdata_write[0] = (uint8_t)(cmd >>8);
i2cdata_write[1] = (uint8_t)(cmd&0xFF);
i2c_write(&i2cmaster, MBED_I2C_SLAVE_ADDR0, &i2cdata_write[0], 2, 1);
}
/*
struct node
{
int info;
struct node *ptr;
}*front,*rear,*temp,*front1;
*/
//int frontelement();
//void enq(int data);
//void deq();
/*
void enq(int data)
{
if (rear == NULL)
{
rear = (struct node *)malloc(1*sizeof(struct node));
if(rear == NULL)
{
printf("\n\rmalloc rear failed!\n");
return;
}
rear->ptr = NULL;
rear->info = data;
front = rear;
//printf("front info: %d\n", front->info);
}
else
{
temp=(struct node *)malloc(1*sizeof(struct node));
rear->ptr = temp;
temp->info = data;
temp->ptr = NULL;
rear = temp;
//printf("rear info: %d\n", rear->info);
}
count++;
}
void deq()
{
front1 = front;
//printf("front info before deq: %d\n", front->info);
if (front1 == NULL)
{
printf("Error: Trying to display elements from empty queue\n");
return;
}
else
{
if (front1->ptr != NULL)
{
front1 = front1->ptr;
//printf("\nDequed value : %d\n", front->info);
free(front);
front = front1;
}
else
{
//printf("\nDequed value : %d\n", front->info);
free(front);
front = NULL;
rear = NULL;
}
count--;
}
}
*/
void main(void)
{
int result;
int i, data;
int temprature;
int flag = 0;
int sum = 0;
int average = 0;
struct node *output;
char intertupt;
DiagPrintf("Sensor_Init \r\n");
//for(i=0; i<16; i++)
//printf("ouput before: %d\n", i2cdata_read[i]);
i2c_init(&i2cmaster, MBED_I2C_MTR_SDA ,MBED_I2C_MTR_SCL);
i2c_frequency(&i2cmaster,MBED_I2C_BUS_CLK);
ePL_WriteCommand(SENSOR_START);
ePL_WriteCommand(REBOOT);
//ePL_WriteCommand(BYPASS);
while(1){
//i2c_write(&i2cmaster, MBED_I2C_SLAVE_ADDR0, &i2cdatasrc[3], 1, 1);
//i2c_read(&i2cmaster, MBED_I2C_SLAVE_ADDR0, (char*)&i2cdata_read[3], 2, 1);
//printf("Status Reg: %d\n", i2cdata_read[3]);
i2c_write(&i2cmaster, MBED_I2C_SLAVE_ADDR0, &i2cdatasrc[1], 1, 1);
i2c_read(&i2cmaster, MBED_I2C_SLAVE_ADDR0, (char*)&i2cdata_read[1], 2, 1);
//printf("--------pressure output LSB: %d\n", i2cdata_read[4]);
i2c_write(&i2cmaster, MBED_I2C_SLAVE_ADDR0, &i2cdatasrc[2], 1, 1);
i2c_read(&i2cmaster, MBED_I2C_SLAVE_ADDR0, (char*)&i2cdata_read[2], 2, 1);
//printf("--------pressure output MID: %d\n", i2cdata_read[5]);
i2c_write(&i2cmaster, MBED_I2C_SLAVE_ADDR0, &i2cdatasrc[3], 1, 1);
i2c_read(&i2cmaster, MBED_I2C_SLAVE_ADDR0, (char*)&i2cdata_read[3], 2, 1);
//printf("--------pressure output MSB: %d\n", i2cdata_read[6]);
Mdelay(2000);
data = (i2cdata_read[3]*256*256*100+i2cdata_read[2]*256*100+i2cdata_read[1]*100)/4128;
printf("pressure: %dPa\n", data);
/*
if(count == 20)
{
deq();
}
enq(data);
output = front;
sum = front->info;
while(output->ptr != NULL)
{
output = output->ptr;
sum = sum + output->info;
}
//printf("------count = %d---------\n", count);
average = sum / count;
//printf("---final output: %d---\n", average);
*/
}
Mdelay(1000);
}