add examples

RTL00_SDKV35a/example_sources/i2c_epl2590_proximity/readme.txt

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+Example Description
+
+This example describes how to use proximity sensor to detect distance
+
+Requirement Components:
+    extend board
+
+work with arduino extended board, which has proximity sensor
+
+When the proximity sensor is in PS mode (detect distance), if the object is close to the sensor, a near message will print out. Otherwise a far message will print out.
+  
+

RTL00_SDKV35a/example_sources/i2c_epl2590_proximity/src/main.c

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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    0x49
+#define MBED_I2C_BUS_CLK        100000  //hz
+#define I2C_DATA_MAX_LENGTH     20
+
+uint8_t i2cdata_write[I2C_DATA_MAX_LENGTH];
+uint8_t i2cdata_read[I2C_DATA_MAX_LENGTH];
+uint16_t cmd;
+
+i2c_t   i2cmaster;
+//sensor command     
+#define WAKE_UP 0x1102
+#define CHIP_REFRESH1 0xFD8E
+#define CHIP_REFRESH2 0xFE22
+#define CHIP_REFRESH3 0xFE02
+#define CHIP_REFRESH4 0xFD00
+#define PS_MODE 0x0002
+#define ALS1_MODE 0x0072
+#define ALS2_MODE 0x503E
+#define ALS3_MODE 0x583E
+#define POWER_UP 0x1102 
+#define CHIP_RESET 0x1100
+#define CHANGE_TIME 0x0851
+#define SETTING_1 0x0F19
+#define SETTING_2 0x0D10
+#define INT 0x3022
+
+char    i2cdatasrc[5] = {0x1B, 0x1E, 0x1F, 0x80, 0x88};
+
+
+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);   
+}  
+
+
+void main(void)
+{
+        int result;
+        int i;
+        int flag = 0;
+        char intertupt;
+
+	DiagPrintf("Sensor_Init \r\n");
+	i2c_init(&i2cmaster, MBED_I2C_MTR_SDA ,MBED_I2C_MTR_SCL);
+	i2c_frequency(&i2cmaster,MBED_I2C_BUS_CLK);
+ 
+        ePL_WriteCommand(WAKE_UP);
+        ePL_WriteCommand(CHIP_REFRESH1);
+        ePL_WriteCommand(CHIP_REFRESH2);
+        ePL_WriteCommand(CHIP_REFRESH3);
+        ePL_WriteCommand(CHIP_REFRESH4);
+        
+	ePL_WriteCommand(PS_MODE);
+        
+        ePL_WriteCommand(SETTING_1);
+        ePL_WriteCommand(SETTING_2);
+        
+        
+	ePL_WriteCommand(CHIP_RESET);
+        
+        ePL_WriteCommand(POWER_UP);
+        Mdelay(240);
+        while(1){
+            //ePL_WriteCommand(DATA_LOCK);
+            i2c_write(&i2cmaster, MBED_I2C_SLAVE_ADDR0, &i2cdatasrc[0], 1, 1);  
+            i2c_read(&i2cmaster, MBED_I2C_SLAVE_ADDR0, (char*)&i2cdata_read[0], 2, 1);
+            i2c_write(&i2cmaster, MBED_I2C_SLAVE_ADDR0, &i2cdatasrc[1], 1, 1);  
+            i2c_read(&i2cmaster, MBED_I2C_SLAVE_ADDR0, (char*)&i2cdata_read[1], 2, 1);
+            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("PS LOW: %d\n", i2cdata_read[1]);
+            //printf("PS HIGH: %d\n", i2cdata_read[2]);
+            flag = (i2cdata_read[0] & 8)? 1:0;
+            int ret = (i2cdata_read[0] & 4)? 1:0;
+            //printf("flag: %d\n", flag);
+            //printf("ret: %d\n", ret);
+            
+          if(flag){
+            printf("the object is far\n");
+          }
+          else
+          {
+            printf("the object is near\n");
+          }
+        
+        //ePL_WriteCommand(POWER_UP);
+        Mdelay(1000);
+        
+        }
+
+        
+	
+
+       
+       
+  
+}