change to new 1-wire platform (#6860)

Co-authored-by: Samuel Sieb <samuel@sieb.net> Co-authored-by: Jesse Hills <3060199+jesserockz@users.noreply.github.com>
2026-05-31 18:18:27 +02:00 · 2024-06-11 18:05:44 -07:00
parent 7b60543afd
commit 13fabf1cd8
28 changed files with 802 additions and 773 deletions
@@ -0,0 +1,88 @@
+#include "one_wire_bus.h"
+#include "esphome/core/helpers.h"
+
+namespace esphome {
+namespace one_wire {
+
+static const char *const TAG = "one_wire";
+
+static const uint8_t DALLAS_MODEL_DS18S20 = 0x10;
+static const uint8_t DALLAS_MODEL_DS1822 = 0x22;
+static const uint8_t DALLAS_MODEL_DS18B20 = 0x28;
+static const uint8_t DALLAS_MODEL_DS1825 = 0x3B;
+static const uint8_t DALLAS_MODEL_DS28EA00 = 0x42;
+
+const uint8_t ONE_WIRE_ROM_SELECT = 0x55;
+const uint8_t ONE_WIRE_ROM_SEARCH = 0xF0;
+
+const std::vector<uint64_t> &OneWireBus::get_devices() { return this->devices_; }
+
+bool IRAM_ATTR OneWireBus::select(uint64_t address) {
+  if (!this->reset())
+    return false;
+  this->write8(ONE_WIRE_ROM_SELECT);
+  this->write64(address);
+  return true;
+}
+
+void OneWireBus::search() {
+  this->devices_.clear();
+
+  this->reset_search();
+  uint64_t address;
+  while (true) {
+    {
+      InterruptLock lock;
+      if (!this->reset()) {
+        // Reset failed or no devices present
+        return;
+      }
+
+      this->write8(ONE_WIRE_ROM_SEARCH);
+      address = this->search_int();
+    }
+    if (address == 0)
+      break;
+    auto *address8 = reinterpret_cast<uint8_t *>(&address);
+    if (crc8(address8, 7) != address8[7]) {
+      ESP_LOGW(TAG, "Dallas device 0x%s has invalid CRC.", format_hex(address).c_str());
+    } else {
+      this->devices_.push_back(address);
+    }
+  }
+}
+
+void OneWireBus::skip() {
+  this->write8(0xCC);  // skip ROM
+}
+
+const LogString *OneWireBus::get_model_str(uint8_t model) {
+  switch (model) {
+    case DALLAS_MODEL_DS18S20:
+      return LOG_STR("DS18S20");
+    case DALLAS_MODEL_DS1822:
+      return LOG_STR("DS1822");
+    case DALLAS_MODEL_DS18B20:
+      return LOG_STR("DS18B20");
+    case DALLAS_MODEL_DS1825:
+      return LOG_STR("DS1825");
+    case DALLAS_MODEL_DS28EA00:
+      return LOG_STR("DS28EA00");
+    default:
+      return LOG_STR("Unknown");
+  }
+}
+
+void OneWireBus::dump_devices_(const char *tag) {
+  if (this->devices_.empty()) {
+    ESP_LOGW(tag, "  Found no devices!");
+  } else {
+    ESP_LOGCONFIG(tag, "  Found devices:");
+    for (auto &address : this->devices_) {
+      ESP_LOGCONFIG(tag, "    0x%s (%s)", format_hex(address).c_str(), LOG_STR_ARG(get_model_str(address & 0xff)));
+    }
+  }
+}
+
+}  // namespace one_wire
+}  // namespace esphome