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初學stm8l15x芯片，看了下網上的一些例程，改寫了一個使用STM8L152K4芯片讀取外部光敏電阻電壓值，并使用芯片內部ad轉換，將對應電壓轉換為光敏值，同時在高于2.0時觸發高報繼電器，低于1.0時觸發低報繼電器；
/*采集外部光敏電壓輸出值，通過內置12位ad轉換顯示出對應的光敏值，
高于x1觸發繼電器一，低于x2觸發繼電器二，
同時將采集到的光敏值通過lcd四位顯示出來
2020-08-13
by 倪sir*/
#include "stm8l15x.h"
#include "lcd.h"
unsigned char Ht1621Tab[]={0x00,0x00,0x00,0x00};
//以下定義LED與按鍵的接口
#define LED1_GPIO_PORT GPIOC //BLUE
#define LED1_GPIO_PINS GPIO_Pin_1
#define LED2_GPIO_PORT GPIOC //RED
#define LED2_GPIO_PINS GPIO_Pin_0
/*不精確延時函數*/
void Delay(__IO uint16_t nCount)
{
/* Decrement nCount value */
while (nCount != 0)
{
nCount--;
}
}
/*ad的初始化函數*/
void ad_init()
{
CLK_PeripheralClockConfig (CLK_Peripheral_ADC1,ENABLE);
ADC_Init (ADC1,ADC_ConversionMode_Single,ADC_Resolution_12Bit,ADC_Prescaler_1);//ADC1，單次采樣，12位，1分頻
ADC_SamplingTimeConfig(ADC1,ADC_Group_FastChannels,ADC_SamplingTime_384Cycles);//采樣周期設置
//ADC_VrefintCmd(ENABLE);//內部基準電壓使能
ADC_ChannelCmd (ADC1,ADC_Channel_8,ENABLE);//adc1的8通道為pd6引腳
//ADC_ChannelCmd (ADC1,ADC_Channel_Vrefint,ENABLE);
ADC_Cmd(ADC1,ENABLE);//ADC1使能
}
void gpio_init()
{
GPIO_Init(LED1_GPIO_PORT, LED1_GPIO_PINS, GPIO_Mode_Out_PP_Low_Slow);//初始化LED1，GPC4高速高電平推挽輸出
GPIO_Init(LED2_GPIO_PORT, LED2_GPIO_PINS, GPIO_Mode_Out_PP_Low_Slow);//初始化LED2，GPC4高速高電平推挽輸出
CLK_PeripheralClockConfig (CLK_Peripheral_TIM4,ENABLE); //使能外設時鐘，STM8L默認所有外設時鐘初始時關閉，使用前徐開啟
}
int main( void )
{
u16 u16_adc1_value;
u16 VoltageValue;
InitLCD();
gpio_init();
ad_init();
while(1)
{
ADC_SoftwareStartConv (ADC1);//開啟軟件轉換
while(!ADC_GetFlagStatus (ADC1,ADC_FLAG_EOC));//等待轉換結束
ADC_ClearFlag (ADC1,ADC_FLAG_EOC);//清除相關標識
u16_adc1_value=ADC_GetConversionValue (ADC1);//獲取轉換值
VoltageValue=u16_adc1_value*3300UL/4095UL;
data_convertor(VoltageValue);
Display();
Display_lcd_dot();
// Delay(5000);
if(VoltageValue >=2000)
{
GPIO_SetBits(LED1_GPIO_PORT, LED1_GPIO_PINS);
GPIO_ResetBits(LED2_GPIO_PORT, LED2_GPIO_PINS);
}
if((VoltageValue<2000)&&(VoltageValue>1000))
{
GPIO_ResetBits(LED1_GPIO_PORT, LED1_GPIO_PINS);
GPIO_ResetBits(LED2_GPIO_PORT, LED2_GPIO_PINS);
}
if((VoltageValue<2000)&&(VoltageValue>1000))
{
GPIO_ResetBits(LED1_GPIO_PORT, LED1_GPIO_PINS);
GPIO_SetBits(LED2_GPIO_PORT, LED2_GPIO_PINS);
}
}
Delay(5000);
Delay(5000);
Delay(5000);
Delay(5000);
Delay(5000);
Delay(5000);
Delay(5000);
Delay(5000);
Delay(5000);
}
#ifdef USE_FULL_ASSERT
/**
* @brief Reports the name of the source file and the source line number
* where the assert_param error has occurred.
* @param file: pointer to the source file name
* @param line: assert_param error line source number
* @retval None
*/
void assert_failed(uint8_t* file, uint32_t line)
{
/* User can add his own implementation to report the file name and line number,
ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
/* Infinite loop */
while (1)
{
}
}
#endif
/**
* @}
*/
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
```
lcd顯示函數
```c
#include "stm8l15x.h"
#include "lcd.h"
uint8_t LCD_DisBuffer[4];//顯示緩沖區
//碼值表 /* 0 1 2 3 4 */
__CONST uint16_t NumberMap[10] = {0x3132, 0x2020, 0x3212, 0x3222, 0x2320,
/* 5 6 7 8 9 */
0x1322, 0x1332, 0x3020, 0x3332, 0x3322};
//數值 BAGFCEDP 碼值
//0 11011110 3132
//1 10001000 2020
//2 11100110 3212
//3 11101010 3222
unsigned int tmp,n1, n2, n3, n4;
void InitLCD(void)
{
CLK_PeripheralClockConfig(CLK_Peripheral_LCD, ENABLE);//LCD驅動時鐘門控使能
CLK_RTCClockConfig(CLK_RTCCLKSource_LSI, CLK_RTCCLKDiv_1);//配置RTC LSI或LSE
LCD_DeInit( );//LCD相關寄存器恢復初值
LCD_Init(LCD_Prescaler_4, LCD_Divider_16,//LCD驅動初始化，LCD刷新頻率
LCD_Duty_1_4, LCD_Bias_1_3,//1/4DUTY 1/3BIAS，看屏幕參數
LCD_VoltageSource_External);//選擇LCD驅動電源，外部或內部
LCD_PortMaskConfig(LCD_PortMaskRegister_0, 0x00); //SEG0-7，STM8L152K4T6沒有
LCD_PortMaskConfig(LCD_PortMaskRegister_1, 0xFF); //SEG8-SEG15，STM8L參考手冊228頁
LCD_PortMaskConfig(LCD_PortMaskRegister_2, 0x00); //以下SEG均沒選用
LCD_PortMaskConfig(LCD_PortMaskRegister_3, 0x00);
LCD_PortMaskConfig(LCD_PortMaskRegister_4, 0x00);
LCD_PortMaskConfig(LCD_PortMaskRegister_5, 0x00);
LCD_ContrastConfig(LCD_Contrast_3V3);//配置對比度
LCD_DeadTimeConfig(LCD_DeadTime_0); //設置死區時間
LCD_PulseOnDurationConfig(LCD_PulseOnDuration_5);// 配置LCD脈沖持續時間
LCD_HighDriveCmd(ENABLE);
LCD_Cmd(ENABLE);
}
/*數據轉換函數*/
void data_convertor(unsigned long adc_value)
{
tmp=adc_value; //adc
n4=tmp/1000;
tmp=tmp%1000;
n3=tmp/100;
tmp=tmp%100;
n2=tmp/10;
tmp=tmp%10;
n1=tmp;
}
void Display()
{ //對顯示緩沖區操作，要結合液晶說明書
LCD_DisBuffer[0]=(((NumberMap[n4] &0xf000)>>12)<<0)|(((NumberMap[n3] &0xf000)>>12)<<2)|(((NumberMap[n2] &0xf000)>>12)<<4)|(((NumberMap[n1] &0xf000)>>12)<<6);//COM0,SEG15-SEG8
LCD_DisBuffer[1]=(((NumberMap[n4] &0x0f00)>>8)<<0)|(((NumberMap[n3] &0x0f00)>>8)<<2)|(((NumberMap[n2] &0x0f00)>>8)<<4)|(((NumberMap[n1] &0x0f00)>>8)<<6); //COM1
LCD_DisBuffer[2]=(((NumberMap[n4] &0x00f0)>>4)<<0)|(((NumberMap[n3] &0x00f0)>>4)<<2)|(((NumberMap[n2] &0x00f0)>>4)<<4)|(((NumberMap[n1] &0x00f0)>>4)<<6); //COM2
LCD_DisBuffer[3]=(((NumberMap[n4] &0x000f)>>0)<<0)|(((NumberMap[n3] &0x000f)>>0)<<2)|(((NumberMap[n2] &0x000f)>>0)<<4)|(((NumberMap[n1] &0x000f)>>0)<<6); //COM3
LCD_WriteRAM(LCD_RAMRegister_1,LCD_DisBuffer[0]); //SEG8-SEG15對應寄存器RAM1，COM0
LCD_WriteRAM(LCD_RAMRegister_4,LCD_DisBuffer[1]<<4);//COM1，SEG8-SEG11對應RAM4高四位
LCD_WriteRAM(LCD_RAMRegister_5,LCD_DisBuffer[1]>>4);//COM1，SEG12-SEG15對應RAM5低四位
LCD_WriteRAM(LCD_RAMRegister_8,LCD_DisBuffer[2]); //COM2，SEG8-SEG15對應RAM8
LCD_WriteRAM(LCD_RAMRegister_11,LCD_DisBuffer[3]<<4);//COM3，SEG8-SEG11對應RAM11高四位
LCD_WriteRAM(LCD_RAMRegister_12,LCD_DisBuffer[3]>>4);//COM3，SEG12-SEG15對應RAM12低四位
}
void Display_lcd_dot(void)
{
LCD_WriteRAM(LCD_RAMRegister_11,(LCD_DisBuffer[3]<<4)|0x40);//2P,COM3，SEG10對應RAM的第7位，所以要與0X40相或
// LCD_WriteRAM(LCD_RAMRegister_12,LCD_DisBuffer[3]>>4|0x04; //4P
//LCD_WriteRAM(LCD_RAMRegister_12,LCD_DisBuffer[3]>>4|0x01;//3P
}
```
希望自己早些入門，敬上��！
有需要stm8l15x庫函數，自�。�
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