硬件

//GY-30
//SCL–P1.4
//SDA–P1.5
//VCC–3.3V
//GND–GND
//ADDR–不接

部分程序

#include <msp430.h>
#include "gy30.h"void Send_Byte(char data)
{while (!(IFG2 & UCA0TXIFG));                // USCI_A0 TX buffer ready?UCA0TXBUF = data;                    // TX -> RXed character
}void Print_Str(char *s)
{while (*s != '\0'){Send_Byte(*s++);delay_ms(5);}
}int lx;
int main(void)
{char SENDSTR[20];WDTCTL = WDTPW + WDTHOLD; /* Stop WDT */if (CALBC1_1MHZ == 0xFF)                  // If calibration constant erased{while (1);                               // do not load, trap CPU!!}DCOCTL = 0;                          // Select lowest DCOx and MODx settingsBCSCTL1 = CALBC1_1MHZ;                    // Set rangeDCOCTL = CALDCO_1MHZ;                     // Set DCO step + modulation */while (1){lx = (int)get_lightpower();Print_Str("GY30:");SENDSTR[0] = lx % 100000 / 10000 + '0';SENDSTR[1] = lx % 10000 / 1000 + '0';SENDSTR[2] = lx % 1000 / 100 + '0';SENDSTR[3] = lx % 100 / 10 + '0';SENDSTR[4] = lx % 10 + '0';SENDSTR[5] = 0;Print_Str (SENDSTR);                   //原始數據Print_Str("\r\n");delay_ms(200);}
}

全部程序

https://docs.qq.com/sheet/DUEdqZ2lmbmR6UVdU?tab=BB08J2