init repository

simple_led/CMakeLists.txt

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+# Generated Cmake Pico project file
+
+cmake_minimum_required(VERSION 3.13)
+
+set(CMAKE_C_STANDARD 11)
+set(CMAKE_CXX_STANDARD 17)
+set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
+set(CMAKE_C_COMPILER "/home/romain/Downloads/pico-sdk/toolchain/riscv/bin/riscv32-unknown-elf-gcc")
+
+# Pull in Raspberry Pi Pico SDK (must be before project)
+include($ENV{PICO_SDK_PATH}/external/pico_sdk_import.cmake)
+
+project(simple_led C CXX ASM)
+
+# Initialise the Raspberry Pi Pico SDK
+pico_sdk_init()
+
+# Add executable. Default name is the project name, version 0.1
+
+add_executable(simple_led main.c )
+
+pico_set_program_name(simple_led "simple_led")
+pico_set_program_version(simple_led "0.1")
+
+# Modify the below lines to enable/disable output over UART/USB
+pico_enable_stdio_uart(simple_led 0)
+pico_enable_stdio_usb(simple_led 1)
+
+# Add the standard library to the build
+target_link_libraries(simple_led
+        pico_stdlib)
+
+# Add the standard include files to the build
+target_include_directories(simple_led PRIVATE
+        ${CMAKE_CURRENT_LIST_DIR}
+)
+
+pico_add_extra_outputs(simple_led)
+

simple_led/main.c

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+#include <stdio.h>
+#include "pico/stdlib.h"
+#include <stdlib.h>
+
+#ifndef LED_DELAY_MS
+    #define LED_DELAY_MS 250
+#endif
+
+#define GPIO_15 15
+#define GPIO_13 13
+
+void pico_led_init(void) {
+    #ifdef PICO_DEFAULT_LED_PIN
+        gpio_init(PICO_DEFAULT_LED_PIN);
+        gpio_set_dir(PICO_DEFAULT_LED_PIN, GPIO_OUT);
+    #endif
+
+    gpio_init(GPIO_15);
+    gpio_set_dir(GPIO_15, GPIO_OUT);
+}
+
+void blink_led(void) {
+    pico_led_init();
+
+    while (true) {
+        gpio_put(GPIO_15, false);
+        gpio_put(PICO_DEFAULT_LED_PIN, true);
+
+        sleep_ms(LED_DELAY_MS);
+
+        gpio_put(GPIO_15, true);
+        gpio_put(PICO_DEFAULT_LED_PIN, false);
+
+        sleep_ms(1000);
+    }
+}
+
+enum button_state {OFF, ON};
+
+typedef struct state state;
+struct state {
+    int counter;
+    int bs;
+    bool can_incr;
+};
+
+static state global_state = (state) {
+    .counter = 0,
+    .can_incr = true
+};
+
+void incr_counter(state *s) {
+    if (s != NULL) {
+        if (s->can_incr) {
+            s->counter++;
+            s->can_incr = false;
+        }
+    }
+}
+
+void set_can_incr(state *s, bool v) {
+    if (s != NULL) {
+        s->can_incr = v;
+    }
+}
+
+bool can_push(state *s) {
+    if (s != NULL)
+        return s->counter <= 10;
+    return true;
+}
+
+
+int main()
+{
+    gpio_init(GPIO_15);
+    gpio_set_dir(GPIO_15, GPIO_OUT);
+
+    gpio_init(GPIO_13);
+    gpio_set_dir(GPIO_13, GPIO_IN);
+
+    while (1) {
+        // return low level when the button is pressed
+        if (!gpio_get(GPIO_13)) {
+            sleep_ms(20); // avoid "bounce" phenomenon (buffeting)
+            if (!gpio_get(GPIO_13)) {
+                incr_counter(&global_state);
+                if (can_push(&global_state))
+                    gpio_put(GPIO_15, true);
+                continue;
+            }
+        }
+        set_can_incr(&global_state, true);
+        gpio_put(GPIO_15, false);
+    }
+
+}