# The MIT License (MIT)
#
# Copyright (c) 2017 Dean Miller for Adafruit Industries
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
"""
`adafruit_seesaw`
====================================================
An I2C to whatever helper chip.
* Author(s): Dean Miller
"""
# This code needs to be broken up into analogio, busio, digitalio, and pulseio
# compatible classes so we won't bother with some lints until then.
# pylint: disable=missing-docstring,invalid-name,too-many-public-methods
import time
from micropython import const
from adafruit_bus_device.i2c_device import I2CDevice
_STATUS_BASE = const(0x00)
_GPIO_BASE = const(0x01)
_SERCOM0_BASE = const(0x02)
_TIMER_BASE = const(0x08)
_ADC_BASE = const(0x09)
_DAC_BASE = const(0x0A)
_INTERRUPT_BASE = const(0x0B)
_DAP_BASE = const(0x0C)
_EEPROM_BASE = const(0x0D)
_NEOPIXEL_BASE = const(0x0E)
_GPIO_DIRSET_BULK = const(0x02)
_GPIO_DIRCLR_BULK = const(0x03)
_GPIO_BULK = const(0x04)
_GPIO_BULK_SET = const(0x05)
_GPIO_BULK_CLR = const(0x06)
_GPIO_BULK_TOGGLE = const(0x07)
_GPIO_INTENSET = const(0x08)
_GPIO_INTENCLR = const(0x09)
_GPIO_INTFLAG = const(0x0A)
_GPIO_PULLENSET = const(0x0B)
_GPIO_PULLENCLR = const(0x0C)
_STATUS_HW_ID = const(0x01)
_STATUS_VERSION = const(0x02)
_STATUS_OPTIONS = const(0x03)
_STATUS_SWRST = const(0x7F)
_TIMER_STATUS = const(0x00)
_TIMER_PWM = const(0x01)
_ADC_STATUS = const(0x00)
_ADC_INTEN = const(0x02)
_ADC_INTENCLR = const(0x03)
_ADC_WINMODE = const(0x04)
_ADC_WINTHRESH = const(0x05)
_ADC_CHANNEL_OFFSET = const(0x07)
_SERCOM_STATUS = const(0x00)
_SERCOM_INTEN = const(0x02)
_SERCOM_INTENCLR = const(0x03)
_SERCOM_BAUD = const(0x04)
_SERCOM_DATA = const(0x05)
_NEOPIXEL_STATUS = const(0x00)
_NEOPIXEL_PIN = const(0x01)
_NEOPIXEL_SPEED = const(0x02)
_NEOPIXEL_BUF_LENGTH = const(0x03)
_NEOPIXEL_BUF = const(0x04)
_NEOPIXEL_SHOW = const(0x05)
_ADC_INPUT_0_PIN = const(0x02)
_ADC_INPUT_1_PIN = const(0x03)
_ADC_INPUT_2_PIN = const(0x04)
_ADC_INPUT_3_PIN = const(0x05)
_PWM_0_PIN = const(0x04)
_PWM_1_PIN = const(0x05)
_PWM_2_PIN = const(0x06)
_PWM_3_PIN = const(0x07)
_HW_ID_CODE = const(0x55)
_EEPROM_I2C_ADDR = const(0x3F)
[docs]class Seesaw:
"""Driver for Seesaw i2c generic conversion trip
:param ~busio.I2C i2c_bus: Bus the SeeSaw is connected to
:param int addr: I2C address of the SeeSaw device"""
INPUT = const(0x00)
OUTPUT = const(0x01)
INPUT_PULLUP = const(0x02)
def __init__(self, i2c_bus, addr=0x49):
self.i2c_device = I2CDevice(i2c_bus, addr)
self.sw_reset()
[docs] def sw_reset(self):
"""Trigger a software reset of the SeeSaw chip"""
self.write8(_STATUS_BASE, _STATUS_SWRST, 0xFF)
time.sleep(.500)
chip_id = self.read8(_STATUS_BASE, _STATUS_HW_ID)
if chip_id != _HW_ID_CODE:
raise RuntimeError("Seesaw hardware ID returned ({:x}) is not "
"correct! Expected {:x}. Please check your wiring."
.format(chip_id, _HW_ID_CODE))
def get_options(self):
buf = bytearray(4)
self.read(_STATUS_BASE, _STATUS_OPTIONS, buf, 4)
ret = (buf[0] << 24) | (buf[1] << 16) | (buf[2] << 8) | buf[3]
return ret
def get_version(self):
buf = bytearray(4)
self.read(_STATUS_BASE, _STATUS_VERSION, buf, 4)
ret = (buf[0] << 24) | (buf[1] << 16) | (buf[2] << 8) | buf[3]
return ret
def pin_mode(self, pin, mode):
self.pin_mode_bulk(1 << pin, mode)
def digital_write(self, pin, value):
self.digital_write_bulk(1 << pin, value)
def digital_read(self, pin):
return self.digital_read_bulk((1 << pin)) != 0
def digital_read_bulk(self, pins):
buf = bytearray(4)
self.read(_GPIO_BASE, _GPIO_BULK, buf)
#TODO: weird overflow error, fix
ret = ((buf[0] & 0xF) << 24) | (buf[1] << 16) | (buf[2] << 8) | buf[3]
return ret & pins
def set_GPIO_interrupts(self, pins, enabled):
cmd = bytearray([(pins >> 24), (pins >> 16), (pins >> 8), pins])
if enabled:
self.write(_GPIO_BASE, _GPIO_INTENSET, cmd)
else:
self.write(_GPIO_BASE, _GPIO_INTENCLR, cmd)
def analog_read(self, pin):
buf = bytearray(2)
pin_mapping = [_ADC_INPUT_0_PIN, _ADC_INPUT_1_PIN,
_ADC_INPUT_2_PIN, _ADC_INPUT_3_PIN]
if pin not in pin_mapping:
raise ValueError("Invalid ADC pin")
self.read(_ADC_BASE, _ADC_CHANNEL_OFFSET + pin_mapping.index(pin), buf)
ret = (buf[0] << 8) | buf[1]
time.sleep(.001)
return ret
def pin_mode_bulk(self, pins, mode):
cmd = bytearray([(pins >> 24), (pins >> 16), (pins >> 8), pins])
if mode == self.OUTPUT:
self.write(_GPIO_BASE, _GPIO_DIRSET_BULK, cmd)
elif mode == self.INPUT:
self.write(_GPIO_BASE, _GPIO_DIRCLR_BULK, cmd)
elif mode == self.INPUT_PULLUP:
self.write(_GPIO_BASE, _GPIO_DIRCLR_BULK, cmd)
self.write(_GPIO_BASE, _GPIO_PULLENSET, cmd)
self.write(_GPIO_BASE, _GPIO_BULK_SET, cmd)
def digital_write_bulk(self, pins, value):
cmd = bytearray([(pins >> 24), (pins >> 16), (pins >> 8), pins])
if value:
self.write(_GPIO_BASE, _GPIO_BULK_SET, cmd)
else:
self.write(_GPIO_BASE, _GPIO_BULK_CLR, cmd)
def analog_write(self, pin, value):
pin_mapping = [_PWM_0_PIN, _PWM_1_PIN, _PWM_2_PIN, _PWM_3_PIN]
if pin in pin_mapping:
cmd = bytearray([pin_mapping.index(pin), value])
self.write(_TIMER_BASE, _TIMER_PWM, cmd)
# def enable_sercom_data_rdy_interrupt(self, sercom):
#
# _sercom_inten.DATA_RDY = 1
# self.write8(SEESAW_SERCOM0_BASE + sercom, SEESAW_SERCOM_INTEN, _sercom_inten.get())
#
#
# def disable_sercom_data_rdy_interrupt(self, sercom):
#
# _sercom_inten.DATA_RDY = 0
# self.write8(SEESAW_SERCOM0_BASE + sercom, SEESAW_SERCOM_INTEN, _sercom_inten.get())
#
#
# def read_sercom_data(self, sercom):
#
# return self.read8(SEESAW_SERCOM0_BASE + sercom, SEESAW_SERCOM_DATA)
def set_i2c_addr(self, addr):
self.eeprom_write8(_EEPROM_I2C_ADDR, addr)
time.sleep(.250)
self.i2c_device.device_address = addr
self.sw_reset()
def get_i2c_addr(self):
return self.read8(_EEPROM_BASE, _EEPROM_I2C_ADDR)
def eeprom_write8(self, addr, val):
self.eeprom_write(addr, bytearray([val]))
def eeprom_write(self, addr, buf):
self.write(_EEPROM_BASE, addr, buf)
def eeprom_read8(self, addr):
return self.read8(_EEPROM_BASE, addr)
def uart_set_baud(self, baud):
cmd = bytearray([(baud >> 24), (baud >> 16), (baud >> 8), baud])
self.write(_SERCOM0_BASE, _SERCOM_BAUD, cmd)
def write8(self, reg_base, reg, value):
self.write(reg_base, reg, bytearray([value]))
def read8(self, reg_base, reg):
ret = bytearray(1)
self.read(reg_base, reg, ret)
return ret[0]
def read(self, reg_base, reg, buf, delay=.001):
self.write(reg_base, reg)
time.sleep(delay)
with self.i2c_device as i2c:
i2c.readinto(buf)
def write(self, reg_base, reg, buf=None):
full_buffer = bytearray([reg_base, reg])
if buf is not None:
full_buffer += buf
with self.i2c_device as i2c:
i2c.write(full_buffer)