Revision 0:0e430cef393b, committed 2016-03-22

Comitter:

akhilpanayam

Date:

Tue Mar 22 04:58:03 2016 +0000

Commit message:

Initial Commit with implementations.

Changed in this revision

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/AT30TSE75X.cpp	Tue Mar 22 04:58:03 2016 +0000
@@ -0,0 +1,73 @@
+#include "AT30TSE75X.h"
+
+AT30TSE75X::AT30TSE75X(PinName sda, PinName scl) : at30tse75x_i2c(sda, scl), resolution(AT30TSE_CONFIG_RES_9_bit) {
+    at30tse75x_i2c.frequency(10000);
+}
+AT30TSE75X::~AT30TSE75X() { }
+
+float AT30TSE75X::read_temp() {
+    uint8_t bufferwrite[1];
+    uint8_t buffer[2];
+    float temperature;
+    uint16_t data;
+    buffer[0] = 0;
+    buffer[1] = 0;
+
+    at30tse75x_i2c.read((AT30TSE_TEMPERATURE_TWI_ADDR << 1 ),(char *)buffer,AT30TSE_TEMPERATURE_REG_SIZE,false);
+
+
+    data = (buffer[0] << 8) | buffer[1];
+    int8_t sign = 1;
+
+    /* Check if negative and clear sign bit. */
+    if (data & (1 << 15)) {
+        sign *= -1;
+        data &= ~(1 << 15);
+    }
+
+    /* Convert to temperature. */
+    switch (this->resolution) {
+    case AT30TSE_CONFIG_RES_9_bit:
+        data = (data >> 7);
+        (temperature) = data * sign * 0.5;
+        break;
+
+    case AT30TSE_CONFIG_RES_10_bit:
+        data = (data >> 6);
+        (temperature) = data * sign * 0.25;
+        break;
+
+    case AT30TSE_CONFIG_RES_11_bit:
+        data = (data >> 5);
+        (temperature) = data * sign * 0.125;
+        break;
+
+    case AT30TSE_CONFIG_RES_12_bit:
+        data = (data >> 4);
+        (temperature) = data * sign * 0.0625;
+        break;
+
+    default:
+        break;
+    }
+    return temperature;
+}
+
+uint8_t AT30TSE75X:: read_eeprom(uint8_t *data, uint8_t length, uint8_t word_addr, uint8_t page) {  
+    uint8_t buff[20];
+    buff[0]  = (word_addr & 0x0F) | ((0x0F & page) << 4);
+        
+    at30tse75x_i2c.write((int)(AT30TSE_EEPROM_TWI_ADDR << 1),(char *)buff,1,false);
+    return at30tse75x_i2c.read((int)(AT30TSE_EEPROM_TWI_ADDR << 1),(char *)data,length,false);  
+}
+
+uint8_t AT30TSE75X:: write_eeprom(uint8_t *data, uint8_t length, uint8_t word_addr, uint8_t page)
+{
+    uint8_t buff[length+1];;
+    buff[0] = (word_addr & 0x0F) | ((0x0F & page) << 4);
+    for(int i = 0; i < length; i++)
+    {
+        buff[i+1] = *data++;
+    }
+    return  at30tse75x_i2c.write((int)(AT30TSE_EEPROM_TWI_ADDR << 1),(char *)buff,(length + 1),false);
+}
\ No newline at end of file

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/AT30TSE75X.h	Tue Mar 22 04:58:03 2016 +0000
@@ -0,0 +1,71 @@
+#ifndef AT30TSE75X_H
+#define AT30TSE75X_H
+
+#include "mbed.h"
+
+#define AT30TSE_TEMPERATURE_TWI_ADDR  (AT30TSE75X_DEVICE_TYPE_ID_TEMP | \
+(BOARD_AT30TSE_DEVICE_ADDR & 0x07))
+
+/* AT30TSE75x Device Type ID for Temperature Sensor: 0b1001xxx */
+#define AT30TSE75X_DEVICE_TYPE_ID_TEMP    0x48
+/* AT30TSE75x Device Type ID for EEPROM: 0b1010xxx */
+#define AT30TSE75X_DEVICE_TYPE_ID_EEPROM  0x50
+
+#define BOARD_AT30TSE_DEVICE_ADDR  0x07 /* 0b111 */ /*CAn be varied according to the condition of A0, A1, A2*/
+
+#define AT30TSE_CONFIG_RES_9_bit    0
+#define AT30TSE_CONFIG_RES_10_bit   1
+#define AT30TSE_CONFIG_RES_11_bit   2
+#define AT30TSE_CONFIG_RES_12_bit   3
+
+#define AT30TSE_TEMPERATURE_REG_SIZE    2
+
+#if (BOARD_USING_AT30TSE != AT30TSE752) && \
+(BOARD_USING_AT30TSE != AT30TSE754) && \
+(BOARD_USING_AT30TSE != AT30TSE758) && \
+(BOARD_USING_AT30TSE != AT30TS75)
+/* Using AT30TSE758 in Default */
+#define BOARD_USING_AT30TSE  AT30TSE758
+#endif
+
+/* Setting the AT30TSE75x Temperature Sensor Address */
+#define AT30TSE_TEMPERATURE_TWI_ADDR  (AT30TSE75X_DEVICE_TYPE_ID_TEMP | \
+(BOARD_AT30TSE_DEVICE_ADDR & 0x07))
+
+#define AT30TSE752                      1
+#define AT30TSE754                      2
+#define AT30TSE758                      3
+#define AT30TS75                        4
+
+#if BOARD_USING_AT30TSE == AT30TSE752
+#define AT30TSE_EEPROM_TWI_ADDR  (AT30TSE75X_DEVICE_TYPE_ID_EEPROM | \
+(BOARD_AT30TSE_DEVICE_ADDR & 0x07))
+#elif BOARD_USING_AT30TSE == AT30TSE754
+#define AT30TSE_EEPROM_TWI_ADDR  (AT30TSE75X_DEVICE_TYPE_ID_EEPROM | \
+(BOARD_AT30TSE_DEVICE_ADDR & 0x06))
+#elif BOARD_USING_AT30TSE == AT30TSE758
+#define AT30TSE_EEPROM_TWI_ADDR  (AT30TSE75X_DEVICE_TYPE_ID_EEPROM | \
+(BOARD_AT30TSE_DEVICE_ADDR & 0x04))
+#elif BOARD_USING_AT30TSE != AT30TS75
+/* Using AT30TSE758 in Default */
+#define AT30TSE_EEPROM_TWI_ADDR  (AT30TSE75X_DEVICE_TYPE_ID_EEPROM | \
+(BOARD_AT30TSE_DEVICE_ADDR & 0x04))
+#endif
+
+class AT30TSE75X
+{
+public:
+  AT30TSE75X(PinName sda, PinName scl);
+  ~AT30TSE75X();
+
+  float read_temp();
+  uint8_t read_eeprom(uint8_t *data, uint8_t length, uint8_t word_addr, uint8_t page);
+  uint8_t write_eeprom(uint8_t *data, uint8_t length, uint8_t word_addr, uint8_t page);
+  
+  I2C at30tse75x_i2c;
+private:
+  uint8_t resolution;
+
+};
+
+#endif
\ No newline at end of file