以下是 LPCXpresso55S16 中 ADC 的配置步骤和示例代码,需要使用 Zephyr 3.3.99:
1. 在 Zephyr 的 Kconfig 文件中启用 ADC 配置,可以使用以下命令:
```bash
west build -b lpcxpresso55s16 samples/boards/lpcxpresso55s69/
```
2. 在应用程序中包含头文件 "drivers/adc.h",并使用以下函数初始化 ADC 控制器:
```c
struct adc_seq_table table = {
.channels = BIT(0), // Using channel 0
.buffer = &readings[0],
.buffer_size = sizeof(readings),
.resolution = 12,
.options = 0,
};
adc_sequence_setup(dev, &table);
```
3. 使用以下函数启动 ADC 转换,并等待读取结果:
```c
adc_read(dev, &table);
// Wait for the conversion to complete
while (adc_is_busy(dev)) {
k_busy_wait(1);
}
// Process the readings
for (int i = 0; i < table.buffer_size; i++) {
LOG_INF("ADC reading %d: %d", i, readings[i]);
}
```
完整示例代码:
```c
#include
#include
#include
#include
LOG_MODULE_REGISTER(app);
void main(void)
{
int readings[4] = {0};
const struct device *dev = device_get_binding(DT_LABEL(DT_NODELABEL(adc0)));
if (!dev) {
LOG_ERR("Failed to get ADC device");
return;
}
struct adc_seq_table table = {
.channels = BIT(0), // Using channel 0
.buffer = &readings[0],
.buffer_size = sizeof(readings),
.resolution = 12,
.options = 0,
};
if (adc_sequence_setup(dev, &table) != 0) {
LOG_ERR("Failed to setup ADC sequence");
return;
}
while (1) {
adc_read(dev, &table);
// Wait for the conversion to complete
while (adc_is_busy(dev)) {
k_busy_wait(1);
}
// Process the readings
for (int i = 0; i < table.buffer_size; i++) {
LOG_INF("ADC reading %d: %d", i, readings[i]);
}
k_sleep(K_SECONDS(1));
}
}
```
以下是 LPCXpresso55S16 中 ADC 的配置步骤和示例代码,需要使用 Zephyr 3.3.99:
1. 在 Zephyr 的 Kconfig 文件中启用 ADC 配置,可以使用以下命令:
```bash
west build -b lpcxpresso55s16 samples/boards/lpcxpresso55s69/
```
2. 在应用程序中包含头文件 "drivers/adc.h",并使用以下函数初始化 ADC 控制器:
```c
struct adc_seq_table table = {
.channels = BIT(0), // Using channel 0
.buffer = &readings[0],
.buffer_size = sizeof(readings),
.resolution = 12,
.options = 0,
};
adc_sequence_setup(dev, &table);
```
3. 使用以下函数启动 ADC 转换,并等待读取结果:
```c
adc_read(dev, &table);
// Wait for the conversion to complete
while (adc_is_busy(dev)) {
k_busy_wait(1);
}
// Process the readings
for (int i = 0; i < table.buffer_size; i++) {
LOG_INF("ADC reading %d: %d", i, readings[i]);
}
```
完整示例代码:
```c
#include
#include
#include
#include
LOG_MODULE_REGISTER(app);
void main(void)
{
int readings[4] = {0};
const struct device *dev = device_get_binding(DT_LABEL(DT_NODELABEL(adc0)));
if (!dev) {
LOG_ERR("Failed to get ADC device");
return;
}
struct adc_seq_table table = {
.channels = BIT(0), // Using channel 0
.buffer = &readings[0],
.buffer_size = sizeof(readings),
.resolution = 12,
.options = 0,
};
if (adc_sequence_setup(dev, &table) != 0) {
LOG_ERR("Failed to setup ADC sequence");
return;
}
while (1) {
adc_read(dev, &table);
// Wait for the conversion to complete
while (adc_is_busy(dev)) {
k_busy_wait(1);
}
// Process the readings
for (int i = 0; i < table.buffer_size; i++) {
LOG_INF("ADC reading %d: %d", i, readings[i]);
}
k_sleep(K_SECONDS(1));
}
}
```
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