From e31a96bfe2392e68411019cdc57f0d0b75d65783 Mon Sep 17 00:00:00 2001
From: Tobias Hoff <ToSa27@users.noreply.github.com>
Date: Sun, 6 Oct 2024 21:53:57 +0200
Subject: [PATCH] Allow use of all pulse count unit channels if needed. (#7550)

---
 .../components/pulse_counter/pulse_counter_sensor.cpp    | 9 ++++++++-
 esphome/components/pulse_counter/pulse_counter_sensor.h  | 1 +
 2 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/esphome/components/pulse_counter/pulse_counter_sensor.cpp b/esphome/components/pulse_counter/pulse_counter_sensor.cpp
index 281a61a66a..bd3e4fcbef 100644
--- a/esphome/components/pulse_counter/pulse_counter_sensor.cpp
+++ b/esphome/components/pulse_counter/pulse_counter_sensor.cpp
@@ -53,12 +53,19 @@ pulse_counter_t BasicPulseCounterStorage::read_raw_value() {
 #ifdef HAS_PCNT
 bool HwPulseCounterStorage::pulse_counter_setup(InternalGPIOPin *pin) {
   static pcnt_unit_t next_pcnt_unit = PCNT_UNIT_0;
+  static pcnt_channel_t next_pcnt_channel = PCNT_CHANNEL_0;
   this->pin = pin;
   this->pin->setup();
   this->pcnt_unit = next_pcnt_unit;
+  this->pcnt_channel = next_pcnt_channel;
   next_pcnt_unit = pcnt_unit_t(int(next_pcnt_unit) + 1);
+  if (int(next_pcnt_unit) >= PCNT_UNIT_0 + PCNT_UNIT_MAX) {
+    next_pcnt_unit = PCNT_UNIT_0;
+    next_pcnt_channel = pcnt_channel_t(int(next_pcnt_channel) + 1);
+  }
 
   ESP_LOGCONFIG(TAG, "    PCNT Unit Number: %u", this->pcnt_unit);
+  ESP_LOGCONFIG(TAG, "    PCNT Channel Number: %u", this->pcnt_channel);
 
   pcnt_count_mode_t rising = PCNT_COUNT_DIS, falling = PCNT_COUNT_DIS;
   switch (this->rising_edge_mode) {
@@ -94,7 +101,7 @@ bool HwPulseCounterStorage::pulse_counter_setup(InternalGPIOPin *pin) {
       .counter_h_lim = 0,
       .counter_l_lim = 0,
       .unit = this->pcnt_unit,
-      .channel = PCNT_CHANNEL_0,
+      .channel = this->pcnt_channel,
   };
   esp_err_t error = pcnt_unit_config(&pcnt_config);
   if (error != ESP_OK) {
diff --git a/esphome/components/pulse_counter/pulse_counter_sensor.h b/esphome/components/pulse_counter/pulse_counter_sensor.h
index ef9f73f95c..fc3d8711d1 100644
--- a/esphome/components/pulse_counter/pulse_counter_sensor.h
+++ b/esphome/components/pulse_counter/pulse_counter_sensor.h
@@ -55,6 +55,7 @@ struct HwPulseCounterStorage : public PulseCounterStorageBase {
   pulse_counter_t read_raw_value() override;
 
   pcnt_unit_t pcnt_unit;
+  pcnt_channel_t pcnt_channel;
 };
 #endif