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发表于 2016-12-9 11:09:03
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此贴甚好。呼应一下！
网上对STM32F10X系列的RTC时钟有不少的议论，都觉得很不准确。有空用此板做了一下试验，觉得还不错。下面先上程序，请各位不吝赐教。
//Analog Input speed test (STM32F103C8T6 AD RTC.ino)
#include <RTClock.h>
#define LED_PIN PC13
RTClock rt (RTCSEL_HSE); //RTClock rt (RTCSEL_LSE);
int i=0,THH,TMM,TSS;
int sensorPin0 = 0,sensorValue0;//
int sensorPin1 = 1,sensorValue1;
int sensorPin2 = 2,sensorValue2;
long TimeVar;
void blink () {
digitalWrite(LED_PIN,!digitalRead(LED_PIN));
//RTC_GetCounter() % 86400;
TimeVar=rt.getTime();
if (TimeVar>86399){rtc_set_count(0);}
THH = TimeVar / 3600;// Compute hours
TMM = TimeVar / 60;
while (TMM>59){TMM=TMM-60;}// Compute minutes
TSS = TimeVar % 60; // Compute seconds
Serial.print(THH);Serial.print(":");
Serial.print(TMM);Serial.print(":");
Serial.print(TSS);Serial.print(" ");
Serial.print(sensorValue0);Serial.print(" ");
Serial.print(sensorValue1);Serial.print(" ");
Serial.print(sensorValue2);Serial.print(" ");
Serial.println(i);
i=0;
}
void setup() {
Serial.begin(115200);
pinMode(LED_PIN, OUTPUT);
//pinMode(sensorPin0, INPUT_ANALOG);
//pinMode(sensorPin1, INPUT_ANALOG);
//pinMode(sensorPin2, INPUT_ANALOG);
rtc_set_prescaler_load(62500); //rtc_set_prescaler_load(32768);
rtc_set_count(43199);//11:59:59
rt.attachSecondsInterrupt(blink);
Serial.println("start");
}
void loop() {
sensorValue0=analogRead(sensorPin0);
sensorValue1=analogRead(sensorPin1);
sensorValue2=analogRead(sensorPin2);
i=i+1;
}
程序里顺便把AD的读取速度测了。我用的是8M晶振分频方式，也可用32768晶振，即上面标注的LSE方式。原板上的晶振有问题，已换掉了。 |
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楼主: lyy-cy
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