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- ******************************************/
- #define MAIN_Fosc 22118400L //定義主時鐘
- #include "STC15Fxxxx.H"
- /***********************************************************/
- #define DIS_DOT 0x20
- #define DIS_BLACK 0x10
- #define DIS_ 0x11
- #define P1n_pure_input(bitn) P1M1 |= (bitn), P1M0 &= ~(bitn)
- /****************************** 用戶定義宏 ***********************************/
- #define Cal_MODE 0 //每次測量只讀1次ADC. 分辨率0.01V
- // #define Cal_MODE 1 //每次測量連續讀16次ADC 再平均計算. 分辨率0.01V
- #define Timer0_Reload (65536UL -(MAIN_Fosc / 1000)) //Timer 0 中斷頻率, 1000次/秒
- /*****************************************************************************/
- /************* 本地常量聲明 **************/
- u8 code t_display[]={ //標準字庫
- // 0 1 2 3 4 5 6 7 8 9 A B C D E F
- 0x3F,0x06,0x5B,0x4F,0x66,0x6D,0x7D,0x07,0x7F,0x6F,0x77,0x7C,0x39,0x5E,0x79,0x71,
- //black - H J K L N o P U t G Q r M y
- 0x00,0x40,0x76,0x1E,0x70,0x38,0x37,0x5C,0x73,0x3E,0x78,0x3d,0x67,0x50,0x37,0x6e,
- 0xBF,0x86,0xDB,0xCF,0xE6,0xED,0xFD,0x87,0xFF,0xEF,0x46}; //0. 1. 2. 3. 4. 5. 6. 7. 8. 9. -1
- u8 code T_COM[]={0x01,0x02,0x04,0x08,0x10,0x20,0x40,0x80}; //位碼
- /************* IO口定義 **************/
- sbit P_HC595_SER = P4^0; //pin 14 SER data input
- sbit P_HC595_RCLK = P5^4; //pin 12 RCLk store (latch) clock
- sbit P_HC595_SRCLK = P4^3; //pin 11 SRCLK Shift data clock
- /************* 本地變量聲明 **************/
- u8 LED8[8]; //顯示緩沖
- u8 display_index; //顯示位索引
- bit B_1ms; //1ms標志
- u16 msecond;
- u16 Bandgap;
- u16 Get_ADC10bitResult(u8 channel); //channel = 0~7
- /**********************************************/
- void main(void)
- {
- u8 i;
- u16 j;
- P0M1 = 0; P0M0 = 0; //設置為準雙向口
- P1M1 = 0; P1M0 = 0; //設置為準雙向口
- P2M1 = 0; P2M0 = 0; //設置為準雙向口
- P3M1 = 0; P3M0 = 0; //設置為準雙向口
- P4M1 = 0; P4M0 = 0; //設置為準雙向口
- P5M1 = 0; P5M0 = 0; //設置為準雙向口
- P6M1 = 0; P6M0 = 0; //設置為準雙向口
- P7M1 = 0; P7M0 = 0; //設置為準雙向口
-
- display_index = 0;
- P1ASF = (1<<2) + (1<<3); //P1.2 P1.3做ADC
- P1M1 |= (0xc0); P1M0 &= ~(0xc0); //P1.2 P1.3設置成高阻
- ADC_CONTR = 0xE0; //90T, ADC power on
-
- Timer0_1T();
- Timer0_AsTimer();
- Timer0_16bitAutoReload();
- Timer0_Load(Timer0_Reload);
- Timer0_InterruptEnable();
- Timer0_Run();
- EA = 1; //打開總中斷
-
- for(i=0; i<8; i++) LED8[i] = 0x10; //上電消隱
-
- while(1)
- {
- if(B_1ms) //1ms到
- {
- B_1ms = 0;
- if(++msecond >= 300) //300ms到
- {
- msecond = 0;
- #if (Cal_MODE == 0)
- //=================== 只讀1次ADC, 10bit ADC. 分辨率0.01V ===============================
- Get_ADC10bitResult(2); //通道改變, 先讀一次并丟棄結果, 讓內部的采樣電容的電壓等于輸入值.
- Bandgap = Get_ADC10bitResult(2); //讀外部基準TL431對應的ADC
- Get_ADC10bitResult(3); //通道改變, 先讀一次并丟棄結果, 讓內部的采樣電容的電壓等于輸入值.
- j = Get_ADC10bitResult(3); //讀外部電壓ADC
- j = (u16)((u32)j * 250 / Bandgap); //計算外部電壓, TL431電壓為2.50V, 測電壓分辨率0.01V
- #endif
- //==========================================================================
- //===== 連續讀16次ADC 再平均計算. 分辨率0.01V =========
- #if (Cal_MODE == 1)
- Get_ADC10bitResult(2); //通道改變, 先讀一次并丟棄結果, 讓內部的采樣電容的電壓等于輸入值.
- for(j=0, i=0; i<16; i++)
- {
- j += Get_ADC10bitResult(2); //讀外部基準TL431對應的ADC
- }
- Bandgap = j >> 4; //16次平均
- Get_ADC10bitResult(3); //通道改變, 先讀一次并丟棄結果, 讓內部的采樣電容的電壓等于輸入值.
- for(j=0, i=0; i<16; i++)
- {
- j += Get_ADC10bitResult(3); //讀外部電壓ADC
- }
- j = j >> 4; //16次平均
- j = (u16)((u32)j * 250 / Bandgap); //計算外部電壓, TL431電壓為2.50V, 測電壓分辨率0.01V
- #endif
- //==========================================================================
-
- LED8[5] = j / 100 + DIS_DOT; //顯示外部電壓值
- LED8[6] = (j % 100) / 10;
- LED8[7] = j % 10;
- // j = Bandgap;
- // LED8[0] = j / 1000; //顯示Bandgap ADC值
- // LED8[1] = (j % 1000) / 100;
- // LED8[2] = (j % 100) / 10;
- // LED8[3] = j % 10;
-
- }
- }
- }
- }
- /**********************************************/
- //========================================================================
- // 函數: u16 Get_ADC10bitResult(u8 channel)
- // 描述: 查詢法讀一次ADC結果.
- // 參數: channel: 選擇要轉換的ADC.
- // 返回: 10位ADC結果.
- // 版本: V1.0, 2012-10-22
- //========================================================================
- u16 Get_ADC10bitResult(u8 channel) //channel = 0~7
- {
- ADC_RES = 0;
- ADC_RESL = 0;
- ADC_CONTR = (ADC_CONTR & 0xe0) | 0x08 | channel; //start the ADC
- NOP(4);
- while((ADC_CONTR & 0x10) == 0) ; //wait for ADC finish
- ADC_CONTR &= ~0x10; //清除ADC結束標志
- return (((u16)ADC_RES << 2) | (ADC_RESL & 3));
- }
- /**************** 向HC595發送一個字節函數 ******************/
- void Send_595(u8 dat)
- {
- u8 i;
- for(i=0; i<8; i++)
- {
- dat <<= 1;
- P_HC595_SER = CY;
- P_HC595_SRCLK = 1;
- P_HC595_SRCLK = 0;
- }
- }
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