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                ` `使用FPGA采集數據,為驗證數據正確性,嘗試用串口將數據傳到電腦顯示,利用arduino的串口繪圖器可以將圖像畫出來,一形象的查看數據的準確性。發送數據格式為:data1,data2,.....回車換行。 ` `以下利用arduino產生的兩個正弦波形并通過串口繪圖器繪制。 ``` #define ledPin 13 #define min ( 65536-(62500*0.5)) int dir = 1; int timer1_counter; int value = 0; void setup() { pinMode(ledPin, OUTPUT); noInterrupts(); TCCR1A = 0; TCCR1B = 0; //timer1_counter = 65536-(62500*0.5); //0.5s 定時器中斷 timer1_counter = min; //預加載timer1 65536-16Mhz/256/2Hz TCNT1 = timer1_counter; TCCR1B |= (1 << CS12); TIMSK1 |= (1 << TOIE1); interrupts(); Serial.begin(9600); } ISR(TIMER1_OVF_vect) { digitalWrite(ledPin, digitalRead(ledPin) ^ 1); } float data1 = 0; float dd1,dd2; String temp = ""; void loop() { dd1 = 10*sin(data1); dd2 = 5*sin(data1); Serial.print(dd1); Serial.print(','); Serial.print(dd2); Serial.println(temp); data1+=0.1; delay(30); } ``` ` `現象: ![](https://img.kancloud.cn/ee/f5/eef5a51fba606ef96155a731d1aed9a5_1787x1005.png) ## 寫通用函數 ` `為了使用畫圖,可以編寫一個通用的函數,如下: ``` /** * 打開arduino的串口繪圖器,調用該函數可將數組a中的數據分為幾組畫出來 */ void send2draw(float a[],int len) { for(int i =0;i<len;i++) { printf("%f",a[i]); if(i<len-1)printf(","); } printf("\r\n"); } ```
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