功能
声音越大,亮的灯越多。
oled显示出当前的声音大小。
硬件接线
//OLED----MSP430
//GND-----GND
led
P4八个引脚
adc
P6.0
部分代码
cpp
_EINT();
while (1)
{
adok_ifg = 1; /* 转换结束后变成0 */
ADC12CTL0 |= ADC12SC; // Sampling open
delay_ms(500);
while (adok_ifg == 1)
; /* 等待装换结束 */
fute = adcvalue * 0.00805;
xianshi[0] = fute % 100 / 10 + '0';
xianshi[1] = '.';
xianshi[2] = fute % 10 + '0';
xianshi[3] = 'V';
xianshi[4] = 0;
OLED_ShowString(0, 0, xianshi);
xianshi[0] = adcvalue % 10000 / 1000 + '0';
xianshi[1] = adcvalue % 1000 / 100 + '0';
xianshi[2] = adcvalue % 100 / 10 + '0';
xianshi[3] = adcvalue % 10 + '0';
xianshi[4] = 'X';
xianshi[5] = 0;
OLED_ShowString(0, 2, xianshi);
if (adcvalue <= min_YIN)
adcvalue = min_YIN;
if (adcvalue > max_YIN)
adcvalue = max_YIN;
adcvalue = adcvalue - min_YIN;
temp1 = max_YIN - min_YIN;
duan = temp1 / 8;
if (adcvalue > duan * 7)
{
P4OUT = 0X00;
}
else if (adcvalue > duan * 6)
{
P4OUT = BIT7;
}
else if (adcvalue > duan * 5)
{
P4OUT = BIT7 + BIT6;
}
else if (adcvalue > duan * 4)
{
P4OUT = BIT7 + BIT6 + BIT5;
}
else if (adcvalue > duan * 3)
{
P4OUT = BIT7 + BIT6 + BIT5 + BIT4;
}
else if (adcvalue > duan * 2)
{
P4OUT = BIT7 + BIT6 + BIT5 + BIT4 + BIT3;
}
else if (adcvalue > duan * 1)
{
P4OUT = BIT7 + BIT6 + BIT5 + BIT4 + BIT3 + BIT2;
}
else if (adcvalue > 50)
{
P4OUT = BIT7 + BIT6 + BIT5 + BIT4 + BIT3 + BIT2 + BIT1;
}
else
{
P4OUT = 0XFF;
}
temp1 = max_YIN - min_YIN;
temp2 = (float) adcvalue / (float) temp1 * 300;
temp3 = temp2;
temp1 = 210 + temp3;
CCR1 = temp1; //设置为210到510
xianshi[0] = 'P';
xianshi[1] = 'W';
xianshi[2] = 'M';
xianshi[3] = temp1 % 10000 / 1000 + '0';
xianshi[4] = temp1 % 1000 / 100 + '0';
xianshi[5] = temp1 % 100 / 10 + '0';
xianshi[6] = temp1 % 10 + '0';
xianshi[7] = 0;
OLED_ShowString(0, 4, xianshi);
}
}
// ADC12 interrupt service routine
#pragma vector=ADC12_VECTOR
__interrupt void ADC12_ISR(void)
{
adcvalue = ADC12MEM0;
adok_ifg = 0;
}
全部代码
cpp
https://docs.qq.com/sheet/DUEdqZ2lmbmR6UVdU?u=bdf8eeb84961492ba2b62f7bfee641ea&tab=BB08J2