不得不说，STM32C031C6T6这个芯片很赞，在同价位芯片来说性能还是非常好的，而且编程方便，使用stm32CubeMx即可完成配置，完成了各个基本功能的测试。
在配置串口时，我使用了内部晶振，打开串口中断，实现PC端与开发板的通信功能。
#define LED_ON() HAL_GPIO_WritePin(GPIOA, GPIO_PIN_5, GPIO_PIN_SET);
#define LED_OFF() HAL_GPIO_WritePin(GPIOA, GPIO_PIN_5, GPIO_PIN_RESET);
uint8_t Tx_star1[] = "hello world!\r\n";
uint8_t Tx_star2[] ="led open\r\n";
uint8_t Tx_star3[] ="led off\r\n";
uint8_t Rx_dat = 0;
void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart)
{
if(huart->Instance == USART2)
{
if(Rx_dat == 0xa1)
{
LED_ON();
HAL_UART_Transmit(&huart2,Tx_star2,sizeof(Tx_star2),10000);
HAL_UART_Receive_IT(&huart2,&Rx_dat,1);
}
else if(Rx_dat == 0xa2)
{
LED_OFF();
HAL_UART_Transmit(&huart2,Tx_star3,sizeof(Tx_star3),10000);
HAL_UART_Receive_IT(&huart2,&Rx_dat,1); }
}
}
/* USER CODE END Includes */
/* Private typedef -----------------------------------------------------------*/
/* USER CODE BEGIN PTD */
/* USER CODE END PTD */
/* Private define ------------------------------------------------------------*/
/* USER CODE BEGIN PD */
/* USER CODE END PD */
/* Private macro -------------------------------------------------------------*/
/* USER CODE BEGIN PM */
/* USER CODE END PM */
/* Private variables ---------------------------------------------------------*/
/* USER CODE BEGIN PV */
/* USER CODE END PV */
/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
/* USER CODE BEGIN PFP */
/* USER CODE END PFP */
/* Private user code ---------------------------------------------------------*/
/* USER CODE BEGIN 0 */
/* USER CODE END 0 */
/**
* @brief The application entry point.
* @retval int
*/
int main(void)
{
/* USER CODE BEGIN 1 */
/* USER CODE END 1 */
/* MCU Configuration--------------------------------------------------------*/
/* Reset of all peripherals, Initializes the Flash interface and the Systick. */
HAL_Init();
/* USER CODE BEGIN Init */
/* USER CODE END Init */
/* Configure the system clock */
SystemClock_Config();
/* USER CODE BEGIN SysInit */
/* USER CODE END SysInit */
/* Initialize all configured peripherals */
MX_GPIO_Init();
MX_USART2_UART_Init();
MX_USART1_UART_Init();
/* USER CODE BEGIN 2 */
LED_ON();
HAL_UART_Transmit(&huart2,Tx_star1,sizeof(Tx_star1),10000);
LED_OFF();
HAL_UART_Receive_IT(&huart2,&Rx_dat,1);
/* USER CODE END 2 */
/* Infinite loop */
/* USER CODE BEGIN WHILE */
while (1)
{
/* USER CODE END WHILE */
/* USER CODE BEGIN 3 */
}
/* USER CODE END 3 */
}本来想上云来着，但是本人技术问题，搞了很久还没连上，只能在后续补上；做了一个关于室内人数统计的小功能，可以实现屋里进出人数以及室内人数统计；首先须要OLED的移植，SPI通信的OLED非常好移植，只需要配置相应的管脚就好：
随后将中景园的代码移植更改，同样只需要更改引脚定义的函数就好：
void OLED_Init()
{
GPIO_InitTypeDef GPIO_InitStruct;
__HAL_RCC_GPIOB_CLK_ENABLE();
//CS
GPIO_InitStruct.Pin = OLED_CS_GPIO_PIN;
GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
GPIO_InitStruct.Pull = GPIO_PULLUP;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
HAL_GPIO_Init(OLED_CS_GPIO, &GPIO_InitStruct);
//DC
GPIO_InitStruct.Pin = OLED_DC_GPIO_PIN;
GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
GPIO_InitStruct.Pull = GPIO_PULLUP;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
HAL_GPIO_Init(OLED_DC_GPIO, &GPIO_InitStruct);
//SCLK
GPIO_InitStruct.Pin = OLED_SCLK_GPIO_PIN;
GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
GPIO_InitStruct.Pull = GPIO_PULLUP;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
HAL_GPIO_Init(OLED_SCLK_GPIO, &GPIO_InitStruct);
//SDIN
GPIO_InitStruct.Pin = OLED_SDIN_GPIO_PIN;
GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
GPIO_InitStruct.Pull = GPIO_PULLUP;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
HAL_GPIO_Init(OLED_SDIN_GPIO, &GPIO_InitStruct);
HAL_GPIO_WritePin(OLED_CS_GPIO, OLED_CS_GPIO_PIN, GPIO_PIN_SET);
HAL_GPIO_WritePin(OLED_DC_GPIO, OLED_DC_GPIO_PIN, GPIO_PIN_SET);
HAL_GPIO_WritePin(OLED_SCLK_GPIO, OLED_SCLK_GPIO_PIN, GPIO_PIN_SET);
HAL_GPIO_WritePin(OLED_SDIN_GPIO, OLED_SDIN_GPIO_PIN, GPIO_PIN_SET);
//RESET THE OLED
#if 0
OLED_RST_Set();
delay_ms(100);
OLED_RST_Clr();
delay_ms(100);
OLED_RST_Set();
#endif
OLED_WR_Byte(0xAE,OLED_CMD);//--turn off oled panel
OLED_WR_Byte(0x02,OLED_CMD);//---set low column address
OLED_WR_Byte(0x10,OLED_CMD);//---set high column address
OLED_WR_Byte(0x40,OLED_CMD);//--set start line address Set Mapping RAM Display Start Line (0x00~0x3F)
OLED_WR_Byte(0x81,OLED_CMD);//--set contrast control register
OLED_WR_Byte(0xCF,OLED_CMD); // Set SEG Output Current Brightness
OLED_WR_Byte(0xA1,OLED_CMD);//--Set SEG/Column Mapping 0xa0左右反置 0xa1正常
OLED_WR_Byte(0xC8,OLED_CMD);//Set COM/Row Scan Direction 0xc0上下反置 0xc8正常
OLED_WR_Byte(0xA6,OLED_CMD);//--set normal display
OLED_WR_Byte(0xA8,OLED_CMD);//--set multiplex ratio(1 to 64)
OLED_WR_Byte(0x3f,OLED_CMD);//--1/64 duty
OLED_WR_Byte(0xD3,OLED_CMD);//-set display offset Shift Mapping RAM Counter (0x00~0x3F)
OLED_WR_Byte(0x00,OLED_CMD);//-not offset
OLED_WR_Byte(0xd5,OLED_CMD);//--set display clock divide ratio/oscillator frequency
OLED_WR_Byte(0x80,OLED_CMD);//--set divide ratio, Set Clock as 100 Frames/Sec
OLED_WR_Byte(0xD9,OLED_CMD);//--set pre-charge period
OLED_WR_Byte(0xF1,OLED_CMD);//Set Pre-Charge as 15 Clocks & Discharge as 1 Clock
OLED_WR_Byte(0xDA,OLED_CMD);//--set com pins hardware configuration
OLED_WR_Byte(0x12,OLED_CMD);
OLED_WR_Byte(0xDB,OLED_CMD);//--set vcomh
OLED_WR_Byte(0x40,OLED_CMD);//Set VCOM Deselect Level
OLED_WR_Byte(0x20,OLED_CMD);//-Set Page Addressing Mode (0x00/0x01/0x02)
OLED_WR_Byte(0x02,OLED_CMD);//
OLED_WR_Byte(0x8D,OLED_CMD);//--set Charge Pump enable/disable
OLED_WR_Byte(0x14,OLED_CMD);//--set(0x10) disable
OLED_WR_Byte(0xA4,OLED_CMD);// Disable Entire Display On (0xa4/0xa5)
OLED_WR_Byte(0xA6,OLED_CMD);// Disable Inverse Display On (0xa6/a7)
OLED_WR_Byte(0xAF,OLED_CMD);//--turn on oled panel
OLED_WR_Byte(0xAF,OLED_CMD); /*display ON*/
OLED_Clear();
OLED_Set_Pos(0,0);
}配合两个光电开关就可以实现进入和离开室内的功能判断了，然后就是代码中最核心的逻辑代码：
void READ_PRO()
{
if(in_sign==1)
{
enter_flag = 1;
}
if((enter_flag==1)&&(out_sign==1))//进入
{
while(out_sign==1);
enter_flag=0;
also_have++;
enter_namber++;
}
if(out_sign == 1)
{
out_flag = 1;
}
if((out_flag==1)&&(in_sign==1))//离开
{
while(in_sign==1);
out_flag = 0;
also_have--;
out_number++;
}
}将所有的数据显示在OLED上：
void oled_display()
{
OLED_ShowCHinese(0,0,0);//进
OLED_ShowCHinese(18,0,1);//入
OLED_ShowCHinese(0,3,2);//离
OLED_ShowCHinese(18,3,3);//开
OLED_ShowCHinese(0,6,4);//室
OLED_ShowCHinese(18,6,5);//内
OLED_ShowNum(36,0,enter_namber,3,16);
OLED_ShowNum(36,3,out_number,3,16);
OLED_ShowNum(36,6,also_have,3,16);
}
这个功能可以统计室内人数，以及进出入的总次数，至于连接云端，后期会继续更新的。
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