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Chapter17/cib/app/src/main.cpp

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+#include <algorithm>
+#include <cstdint>
+#include <cstdio>
+
+#include <functional>
+
+#include <stm32f072xb.h>
+
+#include <hal.hpp>
+#include <stm32f0xx_hal_uart.hpp>
+#include <uart_stm32.hpp>
+
+#include <retarget.hpp>
+
+#include <cassert>
+
+#include <cib/cib.hpp>
+
+struct runtime_init : public flow::service<> {};
+
+struct main_loop : public callback::service<> {};
+
+struct send_temperature : public callback::service<float> {};
+
+struct i2c {
+
+    constexpr static auto init = flow::action<"i2c_init">(
+        [](){
+            printf("I2C init ...\r\n");
+        });
+
+    constexpr static auto config = cib::config(
+        cib::extend<runtime_init>(*init)
+    );
+
+};
+
+struct temperature_sensor_component {
+
+    constexpr static auto init = flow::action<"temp_sensor_init">(
+        []() {
+            printf("Initializing temperature sensor ... \r\n");
+        });
+
+    constexpr static auto read_temperature = []() {
+        float temperature = 23.4f;
+
+        cib::service<send_temperature>(temperature);
+    };
+
+    constexpr static auto config = cib::config(
+        cib::extend<main_loop>(read_temperature),
+
+        cib::extend<runtime_init>(i2c::init >> *init)
+    );
+
+};
+
+struct display_temperature_component {
+
+    constexpr static auto display_temperature = [](float temperature) {
+        printf("Temperature is %.2f C\r\n", temperature);
+    };
+
+    constexpr static auto config = cib::config(
+        cib::extend<send_temperature>(display_temperature)
+    );
+
+};
+
+struct data_sender_component {
+
+    constexpr static auto send_temp = [](float temp) {
+        printf("Sending temperature %.2f C\r\n", temp);
+    };
+
+    constexpr static auto config = cib::config(
+        cib::extend<send_temperature>(send_temp)
+    );
+
+};
+
+struct my_project {
+    
+    constexpr static auto config = cib::config(
+        cib::exports<runtime_init,
+                    main_loop,
+                    send_temperature>,
+                        
+        cib::components<i2c,
+                        temperature_sensor_component,
+                        display_temperature_component,
+                        data_sender_component>
+    );
+};
+
+int main()
+{
+    hal::init();
+
+    hal::uart_stm32<hal::stm32::uart> uart(USART2);
+    uart.init();
+
+    retarget::set_stdio_uart(&uart);
+
+    cib::nexus<my_project> nexus{};
+    nexus.init();
+
+    nexus.service<runtime_init>();
+
+    for(int i = 0; i < 3; i++)
+    {
+        nexus.service<main_loop>();
+    }
+
+    while(true)
+    {
+    }
+}