// STM32 Nucleo-L031K6 HAL Blink + printf() example
// Simulation: https://wokwi.com/projects/367244067477216257

#include <stdio.h>
#include <stdint.h>
#include <string.h>
#include <stm32l0xx_hal.h>

// Define the GPIO
#define LED_PORT GPIOA
#define LED_GPIO_CLK RCC_APB2Periph_GPIOA
#define BLU_PIN GPIO_PIN_0
#define GRE_PIN GPIO_PIN_1
#define RED_PIN GPIO_PIN_2

// 定义寄存器控制方法
#define digitalHi(p, i) {p -> BSRR = i;}
#define digitalLo(p, i) {p -> BRR = i;}
#define digitalToggle(p, i) {p -> ODR ^= i;}

// 定义LED IO 控制
#define BLU_ON digitalHi(LED_PORT, BLU_PIN)
#define BLU_OFF digitalLo(LED_PORT, BLU_PIN)
#define BLU_TOGGLE digitalToggle(LED_PORT, BLU_PIN)

#define GRE_ON digitalHi(LED_PORT, GRE_PIN)
#define GRE_OFF digitalLo(LED_PORT, GRE_PIN)
#define GRE_TOGGLE digitalToggle(LED_PORT, GRE_PIN)

#define RED_ON digitalHi(LED_PORT, RED_PIN)
#define RED_OFF digitalLo(LED_PORT, RED_PIN)
#define RED_TOGGLE digitalToggle(LED_PORT, RED_PIN)

/* 基本混色，后面高级用法使用PWM可混出全彩颜色,且效果更好 */

//红
#define LED_RED  \
                    RED_ON;\
                    BLU_OFF\
                    GRE_OFF

//绿
#define LED_GREEN       \
                    RED_OFF;\
                    GRE_ON\
                    BLU_OFF

//蓝
#define LED_BLUE    \
                    RED_OFF;\
                    GRE_OFF\
                    BLU_ON


//黄(红+绿)
#define LED_YELLOW  \
                    RED_ON;\
                    GRE_ON\
                    BLU_OFF
//紫(红+蓝)
#define LED_PURPLE  \
                    RED_ON;\
                    GRE_OFF\
                    BLU_ON

//青(绿+蓝)
#define LED_CYAN \
                    RED_OFF;\
                    GRE_ON\
                    BLU_ON

//白(红+绿+蓝)
#define LED_WHITE   \
                    RED_ON;\
                    GRE_ON\
                    BLU_ON

//黑(全部关闭)
#define LED_RGBOFF  \
                    RED_OFF;\
                    GRE_OFF\
                    BLU_OFF


// GPIO 初始化
void GPIO_Config(){
  GPIO_InitTypeDef GPIO_InitStructure;

  RCC_APB2PeriphClockCmd(LED_GPIO_CLK, ENABLE);

  GPIO_InitStructure.GPIO_Pin = BLU_PIN;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_Init(LED_PORT, &GPIO_InitStructure);

  GPIO_InitStructure.GPIO_Pin = GRE_PIN;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_Init(LED_PORT, &GPIO_InitStructure);

  GPIO_InitStructure.GPIO_Pin = RED_PIN;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_Init(LED_PORT, &GPIO_InitStructure);

  GPIO_SetBits(LED_PORT, BLU_PIN);
  GPIO_SetBits(LED_PORT, GRE_PIN);
  GPIO_SetBits(LED_PORT, RED_PIN);
}

#define SOFT_DELAY Delay(0x0FFFFF);

void Delay(__IO uint32_t nCount);

/**
* @brief  主函数
* @param  无
* @retval 无
*/
int main(void)
{
    /* LED 端口初始化 */
    LED_GPIO_Config();

    while (1)
    {
        BLU_ON;              // 亮
        SOFT_DELAY;
        BLU_OFF;          // 灭

        GRE_ON;             // 亮
        SOFT_DELAY;
        GRE_OFF;          // 灭

        RED_ON;             // 亮
        SOFT_DELAY;
        RED_OFF;          // 灭

        /*轮流显示 红绿蓝黄紫青白 颜色*/
        RED_ON;
        SOFT_DELAY;

        LED_GREEN;
        SOFT_DELAY;

        LED_BLUE;
        SOFT_DELAY;

        LED_YELLOW;
        SOFT_DELAY;

        LED_PURPLE;
        SOFT_DELAY;

        LED_CYAN;
        SOFT_DELAY;

        LED_WHITE;
        SOFT_DELAY;

        LED_RGBOFF;
        SOFT_DELAY;
    }
}

void Delay(__IO uint32_t nCount)     //简单的延时函数
{
    for (; nCount != 0; nCount--);
}