XL9535 I/O Expander (#4899)

Co-authored-by: Jesse Hills <3060199+jesserockz@users.noreply.github.com>
2026-06-03 19:38:30 +02:00 · 2023-06-19 04:26:06 +01:00
parent 67771abc9d
commit 41a618737b
5 changed files with 263 additions and 0 deletions
@@ -0,0 +1,122 @@
+#include "xl9535.h"
+#include "esphome/core/log.h"
+
+namespace esphome {
+namespace xl9535 {
+
+static const char *const TAG = "xl9535";
+
+void XL9535Component::setup() {
+  ESP_LOGCONFIG(TAG, "Setting up XL9535...");
+
+  // Check to see if the device can read from the register
+  uint8_t port = 0;
+  if (this->read_register(XL9535_INPUT_PORT_0_REGISTER, &port, 1) != i2c::ERROR_OK) {
+    this->mark_failed();
+    return;
+  }
+}
+
+void XL9535Component::dump_config() {
+  ESP_LOGCONFIG(TAG, "XL9535:");
+  LOG_I2C_DEVICE(this);
+
+  if (this->is_failed()) {
+    ESP_LOGE(TAG, "Communication with XL9535 failed!");
+  }
+}
+
+bool XL9535Component::digital_read(uint8_t pin) {
+  bool state = false;
+  uint8_t port = 0;
+
+  if (pin > 7) {
+    if (this->read_register(XL9535_INPUT_PORT_1_REGISTER, &port, 1) != i2c::ERROR_OK) {
+      this->status_set_warning();
+      return state;
+    }
+
+    state = (port & (pin - 10)) != 0;
+  } else {
+    if (this->read_register(XL9535_INPUT_PORT_0_REGISTER, &port, 1) != i2c::ERROR_OK) {
+      this->status_set_warning();
+      return state;
+    }
+
+    state = (port & pin) != 0;
+  }
+
+  this->status_clear_warning();
+  return state;
+}
+
+void XL9535Component::digital_write(uint8_t pin, bool value) {
+  uint8_t port = 0;
+  uint8_t register_data = 0;
+
+  if (pin > 7) {
+    if (this->read_register(XL9535_OUTPUT_PORT_1_REGISTER, &register_data, 1) != i2c::ERROR_OK) {
+      this->status_set_warning();
+      return;
+    }
+
+    register_data = register_data & (~(1 << (pin - 10)));
+    port = register_data | value << (pin - 10);
+
+    if (this->write_register(XL9535_OUTPUT_PORT_1_REGISTER, &port, 1) != i2c::ERROR_OK) {
+      this->status_set_warning();
+      return;
+    }
+  } else {
+    if (this->read_register(XL9535_OUTPUT_PORT_0_REGISTER, &register_data, 1) != i2c::ERROR_OK) {
+      this->status_set_warning();
+      return;
+    }
+    register_data = register_data & (~(1 << pin));
+    port = register_data | value << pin;
+
+    if (this->write_register(XL9535_OUTPUT_PORT_0_REGISTER, &port, 1) != i2c::ERROR_OK) {
+      this->status_set_warning();
+      return;
+    }
+  }
+
+  this->status_clear_warning();
+}
+
+void XL9535Component::pin_mode(uint8_t pin, gpio::Flags mode) {
+  uint8_t port = 0;
+
+  if (pin > 7) {
+    this->read_register(XL9535_CONFIG_PORT_1_REGISTER, &port, 1);
+
+    if (mode == gpio::FLAG_INPUT) {
+      port = port | (1 << (pin - 10));
+    } else if (mode == gpio::FLAG_OUTPUT) {
+      port = port & (~(1 << (pin - 10)));
+    }
+
+    this->write_register(XL9535_CONFIG_PORT_1_REGISTER, &port, 1);
+  } else {
+    this->read_register(XL9535_CONFIG_PORT_0_REGISTER, &port, 1);
+
+    if (mode == gpio::FLAG_INPUT) {
+      port = port | (1 << pin);
+    } else if (mode == gpio::FLAG_OUTPUT) {
+      port = port & (~(1 << pin));
+    }
+
+    this->write_register(XL9535_CONFIG_PORT_0_REGISTER, &port, 1);
+  }
+}
+
+void XL9535GPIOPin::setup() { this->pin_mode(this->flags_); }
+
+std::string XL9535GPIOPin::dump_summary() const { return str_snprintf("%u via XL9535", 15, this->pin_); }
+
+void XL9535GPIOPin::pin_mode(gpio::Flags flags) { this->parent_->pin_mode(this->pin_, flags); }
+bool XL9535GPIOPin::digital_read() { return this->parent_->digital_read(this->pin_) != this->inverted_; }
+void XL9535GPIOPin::digital_write(bool value) { this->parent_->digital_write(this->pin_, value != this->inverted_); }
+
+}  // namespace xl9535
+}  // namespace esphome