From 5b1e60fb5f4d65d14e5dd2a5a4e8ac4a95d3b8cf Mon Sep 17 00:00:00 2001
From: Eddy Pedroni <epedroni@pm.me>
Date: Sun, 24 Aug 2025 22:01:32 +0200
Subject: Initial commit, Raspberry pi pico software implementation

---
 power-seq-software/power-seq-software.cpp | 47 +++++++++++++++++++++++++++++++
 1 file changed, 47 insertions(+)
 create mode 100644 power-seq-software/power-seq-software.cpp

(limited to 'power-seq-software/power-seq-software.cpp')

diff --git a/power-seq-software/power-seq-software.cpp b/power-seq-software/power-seq-software.cpp
new file mode 100644
index 0000000..cb10215
--- /dev/null
+++ b/power-seq-software/power-seq-software.cpp
@@ -0,0 +1,47 @@
+#include <cstddef>
+#include <cstdint>
+#include <array>
+#include "pico/stdlib.h"
+#include "pico/sleep.h"
+#include "hardware/gpio.h"
+
+static constexpr std::size_t button_gpio = 6;
+static constexpr std::size_t led_gpio = 2;
+static constexpr std::array<std::size_t, 3> gpio_on_sequence { 3, 4, 5 };
+static constexpr std::array<std::size_t, 3> gpio_off_sequence { 5, 4, 3 };
+static constexpr std::size_t delay_ms = 100;
+
+int main()
+{
+    bool state = false;
+
+    // init LED
+    gpio_init(led_gpio);
+    gpio_set_dir(led_gpio, GPIO_OUT);
+    gpio_put(led_gpio, state);
+
+    // init relay GPIOs
+    for (auto const & relay : gpio_off_sequence)
+    {
+        gpio_init(relay);
+        gpio_set_dir(relay, GPIO_OUT);
+        gpio_put(relay, state);
+    }
+
+    while (true)
+    {
+        sleep_run_from_xosc();
+        sleep_goto_dormant_until_edge_high(button_gpio);
+        sleep_power_up();
+
+        state = !state;
+        gpio_put(led_gpio, state);
+
+        auto const & sequence = state ? gpio_on_sequence : gpio_off_sequence;
+        for (auto const & relay : sequence)
+        {
+            gpio_put(relay, state);
+            sleep_ms(delay_ms);
+        }
+    }
+}
-- 
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