用MK22FN512VLH12的官方库函数里配置PORTB0,PORTB1,PORTB2和PORTB3为16位ADC,并且写一个读取采样值函数设置PORTB0为0,PORTB1为1,PORTB2为2和PORTB3为3,输入函数(0)就输出ADC通道PORTB0采样的值
时间: 2024-03-02 15:52:17 浏览: 32
好的,我明白了。为了配置PORTB0,PORTB1,PORTB2和PORTB3为16位ADC,您可以使用MK22FN512VLH12的官方库函数,具体步骤如下:
1. 首先需要打开ADC模块。可以使用ADC_Init()函数实现。
2. 接下来需要配置ADC通道。可以使用ADC_Configuration()函数实现。
3. 然后需要设置ADC采样时钟。可以使用ADC_Clock_Set()函数实现。
4. 最后,需要启动ADC转换。可以使用ADC_Start()函数实现。
下面是一份示例代码,您可以参考一下:
```c
#include "MK22F51212.h"
void ADC_Init(void)
{
SIM->SCGC6 |= SIM_SCGC6_ADC0_MASK; // Enable ADC0 clock gate
ADC0->CFG1 |= ADC_CFG1_ADICLK(0); // Clock source: Bus clock / 2
ADC0->CFG1 |= ADC_CFG1_ADIV(0); // Clock divide: 1
ADC0->CFG1 |= ADC_CFG1_MODE(3); // 16-bit mode
ADC0->SC2 |= ADC_SC2_ADTRG_MASK; // Enable hardware trigger
}
void ADC_Configuration(void)
{
PORTB->PCR[0] |= PORT_PCR_MUX(0); // Set PORTB0 to ADC0_SE8
PORTB->PCR[1] |= PORT_PCR_MUX(0); // Set PORTB1 to ADC0_SE9
PORTB->PCR[2] |= PORT_PCR_MUX(0); // Set PORTB2 to ADC0_SE10
PORTB->PCR[3] |= PORT_PCR_MUX(0); // Set PORTB3 to ADC0_SE11
ADC0->SC1[0] |= ADC_SC1_ADCH(8); // Select ADC0_SE8 as input channel
ADC0->SC1[1] |= ADC_SC1_ADCH(9); // Select ADC0_SE9 as input channel
ADC0->SC1[2] |= ADC_SC1_ADCH(10); // Select ADC0_SE10 as input channel
ADC0->SC1[3] |= ADC_SC1_ADCH(11); // Select ADC0_SE11 as input channel
}
void ADC_Clock_Set(void)
{
SIM->SCGC6 |= SIM_SCGC6_ADC0_MASK; // Enable ADC0 clock gate
ADC0->CFG2 |= ADC_CFG2_ADHSC_MASK; // High speed conversion mode
ADC0->CFG1 |= ADC_CFG1_ADLSMP_MASK; // Long sample time
ADC0->CFG1 |= ADC_CFG1_ADICLK(0); // Clock source: Bus clock / 2
ADC0->CFG1 |= ADC_CFG1_ADIV(0); // Clock divide: 1
}
void ADC_Start(void)
{
ADC0->SC1[0] |= ADC_SC1_ADCH(8); // Start conversion on ADC0_SE8
ADC0->SC1[1] |= ADC_SC1_ADCH(9); // Start conversion on ADC0_SE9
ADC0->SC1[2] |= ADC_SC1_ADCH(10); // Start conversion on ADC0_SE10
ADC0->SC1[3] |= ADC_SC1_ADCH(11); // Start conversion on ADC0_SE11
}
int ADC_Read(int channel)
{
int result = 0;
switch (channel)
{
case 0:
result = ADC0->R[0];
break;
case 1:
result = ADC0->R[1];
break;
case 2:
result = ADC0->R[2];
break;
case 3:
result = ADC0->R[3];
break;
default:
break;
}
return result;
}
void ADC_Set_Channel(int channel)
{
switch (channel)
{
case 0:
PORTB->PCR[0] |= PORT_PCR_MUX(0);
PORTB->PCR[1] &= ~PORT_PCR_MUX(0);
PORTB->PCR[2] &= ~PORT_PCR_MUX(0);
PORTB->PCR[3] &= ~PORT_PCR_MUX(0);
ADC0->SC1[0] |= ADC_SC1_ADCH(8);
break;
case 1:
PORTB->PCR[0] &= ~PORT_PCR_MUX(0);
PORTB->PCR[1] |= PORT_PCR_MUX(0);
PORTB->PCR[2] &= ~PORT_PCR_MUX(0);
PORTB->PCR[3] &= ~PORT_PCR_MUX(0);
ADC0->SC1[1] |= ADC_SC1_ADCH(9);
break;
case 2:
PORTB->PCR[0] &= ~PORT_PCR_MUX(0);
PORTB->PCR[1] &= ~PORT_PCR_MUX(0);
PORTB->PCR[2] |= PORT_PCR_MUX(0);
PORTB->PCR[3] &= ~PORT_PCR_MUX(0);
ADC0->SC1[2] |= ADC_SC1_ADCH(10);
break;
case 3:
PORTB->PCR[0] &= ~PORT_PCR_MUX(0);
PORTB->PCR[1] &= ~PORT_PCR_MUX(0);
PORTB->PCR[2] &= ~PORT_PCR_MUX(0);
PORTB->PCR[3] |= PORT_PCR_MUX(0);
ADC0->SC1[3] |= ADC_SC1_ADCH(11);
break;
default:
break;
}
}
int ADC_Get_Value(int channel)
{
ADC_Set_Channel(channel);
while (!(ADC0->SC1[channel] & ADC_SC1_COCO_MASK));
return ADC_Read(channel);
}
```
上面的代码实现了配置PORTB0,PORTB1,PORTB2和PORTB3为16位ADC,并且写了一个读取采样值函数设置PORTB0为0,PORTB1为1,PORTB2为2和PORTB3为3,输入函数(0)就输出ADC通道PORTB0采样的值。您可以根据需要进行修改。