ADC12MCTL1 |=ADC12INCH_2+ADC12EOS;
时间: 2024-06-19 10:04:42 浏览: 4
ADC12MCTL1是MSP430内置ADC12模块的第2个模拟输入通道的控制寄存器。这条语句的意思是将ADC12MCTL1寄存器的位ADC12INCH_2和ADC12EOS设置为1,以选择模拟输入通道2并且启用转换序列结束位。
其中,ADC12INCH_2是一个宏定义,表示第2个模拟输入通道。ADC12EOS也是一个宏定义,表示转换序列结束位。
总之,这条语句的作用是配置ADC12模块,使其可以读取模拟输入通道2的数据,并且当转换序列结束时,中断会被触发。
相关问题
msp430f5529adc
msp430f5529adc采样程序可以参考以下代码:
#include <msp430.h>
#define ADC_CHANNELS 8
volatile unsigned int adc_values[ADC_CHANNELS];
void init_adc(void)
{
ADC12CTL = ADC12ON + ADC12MSC + ADC12SHT_8 + ADC12REFON; // ADC12ON, ADC12MSC, ADC12SHT_8, ADC12REFON
ADC12CTL1 = ADC12SHP + ADC12CONSEQ_3; // ADC12SHP, ADC12CONSEQ_3
ADC12CTL2 = ADC12RES_2; // ADC12RES_2
ADC12MCTL = ADC12INCH_; // ADC12INCH_
ADC12MCTL1 = ADC12INCH_1; // ADC12INCH_1
ADC12MCTL2 = ADC12INCH_2; // ADC12INCH_2
ADC12MCTL3 = ADC12INCH_3; // ADC12INCH_3
ADC12MCTL4 = ADC12INCH_4; // ADC12INCH_4
ADC12MCTL5 = ADC12INCH_5; // ADC12INCH_5
ADC12MCTL6 = ADC12INCH_6; // ADC12INCH_6
ADC12MCTL7 = ADC12INCH_7 + ADC12EOS; // ADC12INCH_7, ADC12EOS
ADC12IE = x80; // Enable ADC12IFG.7
ADC12CTL |= ADC12ENC; // Enable conversions
}
#pragma vector=ADC12_VECTOR
__interrupt void adc_isr(void)
{
static unsigned int i = ;
adc_values[i++] = ADC12MEM;
adc_values[i++] = ADC12MEM1;
adc_values[i++] = ADC12MEM2;
adc_values[i++] = ADC12MEM3;
adc_values[i++] = ADC12MEM4;
adc_values[i++] = ADC12MEM5;
adc_values[i++] = ADC12MEM6;
adc_values[i++] = ADC12MEM7;
if (i == ADC_CHANNELS) {
i = ;
}
}
int main(void)
{
WDTCTL = WDTPW + WDTHOLD; // Stop WDT
P6SEL |= xFF; // Enable A/D channel inputs
init_adc();
__enable_interrupt();
while (1) {
// Do something with adc_values
}
return ;
}
msp4305529ADC采样代码
以下是 MSP430F5529 的 ADC 采样代码示例:
```c
#include <msp430.h>
int main(void)
{
WDTCTL = WDTPW | WDTHOLD; // 停用看门狗定时器
ADC12CTL0 = ADC12SHT0_9 | ADC12ON; // 配置 ADC12 采样时间和开启 ADC12
ADC12CTL1 = ADC12SHP | ADC12CONSEQ_2; // 配置 ADC12 转换模式为序列转换模式
ADC12MCTL0 = ADC12INCH_0; // 配置 A0 通道为 ADC12MCTL0
ADC12MCTL1 = ADC12INCH_1 | ADC12EOS; // 配置 A1 通道为 ADC12MCTL1,并设置为序列结束
ADC12IE = 0x02; // 允许 A1 通道的转换结束中断
ADC12CTL0 |= ADC12ENC; // 使能 ADC12 转换
P6SEL |= BIT0 + BIT1; // 配置 P6.0 和 P6.1 为模拟输入通道
while(1)
{
ADC12CTL0 |= ADC12SC; // 开始 ADC12 转换
__bis_SR_register(LPM0_bits + GIE); // CPU 进入低功耗模式0,等待 ADC12 转换完成并触发中断
__no_operation(); // 空操作以防止编译器优化
}
}
#pragma vector = ADC12_VECTOR // ADC12 转换结束中断
__interrupt void ADC12ISR(void)
{
switch(__even_in_range(ADC12IV,34)) // 根据 ADC12IV 寄存器的值判断 ADC12 转换是否完成
{
case 0: break; // 未发生中断
case 2: // A0 转换结束
ADC12CTL0 &= ~ADC12ENC; // 禁止 ADC12 转换
ADC12MCTL0 &= ~ADC12INCH_0; // 清除 A0 通道
ADC12MCTL1 |= ADC12INCH_1; // 配置 A1 通道为 ADC12MCTL1
ADC12CTL0 |= ADC12ENC; // 使能 ADC12 转换
break;
case 4: // A1 转换结束
ADC12CTL0 &= ~ADC12ENC; // 禁止 ADC12 转换
ADC12MCTL1 &= ~ADC12INCH_1; // 清除 A1 通道
ADC12MCTL0 |= ADC12INCH_0; // 配置 A0 通道为 ADC12MCTL0
__bic_SR_register_on_exit(LPM0_bits); // 跳出低功耗模式0
break;
default: break; // 未知的 ADC12 中断
}
}
```
此代码配置 ADC12 为序列转换模式,通过 A0 和 A1 两个通道轮流进行采样,每次采样结束后触发中断,通过中断函数切换 ADC12 的采样通道。
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