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import machine
class TMP117: RESOLUTION = 0.0078125
TEMP_ADDR = 0x00 CONFIG_ADDR = 0x01 NIST_ADDR = 0x05
TEMP_SIZE = 16
CONFIG_REGISTER_MAP = { "HIGH_Alert": 15, "LOW_Alert": 14, "Data_Ready": 13, "EEPROM_Busy": 12, "MOD1": 11, "MOD0": 10, "CONV2": 9, "CONV1": 8, "CONV0": 7, "AVG1": 6, "AVG0": 5, "T/nA": 4, "POL": 3, "DR/Alert": 2, "Soft_Reset": 1, "--": 0 } DEFAULT_CONFIG_INT = 554
def __init__(self, name: str, i2c: machine.I2C|machine.SoftI2C, i2c_addr, config_int): self.name = name self.i2c_addr = i2c_addr self.i2c = i2c self.NIST_ID = int.from_bytes(self.i2c.readfrom_mem(self.i2c_addr, self.NIST_ADDR, 2), "big") # Set configuration self.write_configuration_integer(config_int) def bytes_to_temperature(self, binary:bytes): """Converts a 2's complement 16 bit value to the appropriate temperature value.""" val = int.from_bytes(binary, "big") if (val & (1 << (self.TEMP_SIZE - 1))) != 0: val = val - (1 << self.TEMP_SIZE)
return val * TMP117.RESOLUTION def int_to_config_dict(self, integer:int): """Converts a configuration """ assert integer < 2**(16) bits = list(f"{integer:016b}") bits.reverse()
result = {} for key in self.CONFIG_REGISTER_MAP.keys(): result[key] = bits[self.CONFIG_REGISTER_MAP[key]] return result
def config_dict_to_int(self, config_dict): array = [None for _ in range(16)]
for option in config_dict.keys(): array[self.CONFIG_REGISTER_MAP[option]] = config_dict[option]
array.reverse() bit_string = "" for bit in array: bit_string += str(bit) write_byte = int(bit_string, 2)
def write_configuration_integer(self, config_int:int): write_byte = config_int.to_bytes(2, "big") self.i2c.writeto_mem(self.i2c_addr, self.CONFIG_ADDR, write_byte)
def read_configuration_integer(self): binary = self.i2c.readfrom_mem(self.i2c_addr, self.CONFIG_ADDR, 2) integer = int.from_bytes(binary, "big") return integer
def read_temperature(self): binary = self.i2c.readfrom_mem(self.i2c_addr, self.TEMP_ADDR, 2) return self.bytes_to_temperature(binary)
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