mirror of https://github.com/ARMmbed/mbed-os.git
74 lines
1.8 KiB
C++
74 lines
1.8 KiB
C++
#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);
|
|
}
|