Add sn74hc165 input shift register (#4151)

esphome/components/sn74hc165/__init__.py

@@ -0,0 +1,87 @@
+import esphome.codegen as cg
+import esphome.config_validation as cv
+from esphome import pins
+from esphome.const import (
+    CONF_ID,
+    CONF_MODE,
+    CONF_NUMBER,
+    CONF_INVERTED,
+    CONF_DATA_PIN,
+    CONF_CLOCK_PIN,
+    CONF_INPUT,
+)
+
+CODEOWNERS = ["@jesserockz"]
+DEPENDENCIES = []
+MULTI_CONF = True
+
+sn74hc165_ns = cg.esphome_ns.namespace("sn74hc165")
+
+SN74HC165Component = sn74hc165_ns.class_("SN74HC165Component", cg.Component)
+SN74HC165GPIOPin = sn74hc165_ns.class_(
+    "SN74HC165GPIOPin", cg.GPIOPin, cg.Parented.template(SN74HC165Component)
+)
+
+CONF_SN74HC165 = "sn74hc165"
+CONF_LOAD_PIN = "load_pin"
+CONF_CLOCK_INHIBIT_PIN = "clock_inhibit_pin"
+CONF_SR_COUNT = "sr_count"
+CONFIG_SCHEMA = cv.Schema(
+    {
+        cv.Required(CONF_ID): cv.declare_id(SN74HC165Component),
+        cv.Required(CONF_DATA_PIN): pins.gpio_input_pin_schema,
+        cv.Required(CONF_CLOCK_PIN): pins.gpio_output_pin_schema,
+        cv.Required(CONF_LOAD_PIN): pins.gpio_output_pin_schema,
+        cv.Optional(CONF_CLOCK_INHIBIT_PIN): pins.gpio_output_pin_schema,
+        cv.Optional(CONF_SR_COUNT, default=1): cv.int_range(min=1, max=256),
+    }
+).extend(cv.COMPONENT_SCHEMA)
+
+
+async def to_code(config):
+    var = cg.new_Pvariable(config[CONF_ID])
+    await cg.register_component(var, config)
+    data_pin = await cg.gpio_pin_expression(config[CONF_DATA_PIN])
+    cg.add(var.set_data_pin(data_pin))
+    clock_pin = await cg.gpio_pin_expression(config[CONF_CLOCK_PIN])
+    cg.add(var.set_clock_pin(clock_pin))
+    load_pin = await cg.gpio_pin_expression(config[CONF_LOAD_PIN])
+    cg.add(var.set_load_pin(load_pin))
+    if CONF_CLOCK_INHIBIT_PIN in config:
+        clock_inhibit_pin = await cg.gpio_pin_expression(config[CONF_CLOCK_INHIBIT_PIN])
+        cg.add(var.set_clock_inhibit_pin(clock_inhibit_pin))
+
+    cg.add(var.set_sr_count(config[CONF_SR_COUNT]))
+
+
+def _validate_input_mode(value):
+    if value is not True:
+        raise cv.Invalid("Only input mode is supported")
+    return value
+
+
+SN74HC165_PIN_SCHEMA = cv.All(
+    {
+        cv.GenerateID(): cv.declare_id(SN74HC165GPIOPin),
+        cv.Required(CONF_SN74HC165): cv.use_id(SN74HC165Component),
+        cv.Required(CONF_NUMBER): cv.int_range(min=0, max=2048, max_included=False),
+        cv.Optional(CONF_MODE, default={}): cv.All(
+            {
+                cv.Optional(CONF_INPUT, default=True): cv.All(
+                    cv.boolean, _validate_input_mode
+                ),
+            },
+        ),
+        cv.Optional(CONF_INVERTED, default=False): cv.boolean,
+    }
+)
+
+
+@pins.PIN_SCHEMA_REGISTRY.register(CONF_SN74HC165, SN74HC165_PIN_SCHEMA)
+async def sn74hc165_pin_to_code(config):
+    var = cg.new_Pvariable(config[CONF_ID])
+    await cg.register_parented(var, config[CONF_SN74HC165])
+
+    cg.add(var.set_pin(config[CONF_NUMBER]))
+    cg.add(var.set_inverted(config[CONF_INVERTED]))
+    return var