uint8_t read_adc_value() { uint8_t adc_value; R_ADC_Start(); adc_value =R_ADC_Get_Result_8bit(uint8_t * const buffer); if (adc_value) { R_ADC_Stop(); } }
时间: 2024-02-06 07:02:22 浏览: 25
这段代码有一些问题。首先,在函数定义的末尾没有返回值,应该添加 "return adc_value;" 语句。其次,在调用 R_ADC_Get_Result_8bit() 函数时,应该传递一个缓冲区指针作为参数,而不是声明一个新的指针变量。最后,在 if 语句中,应该使用 "if (adc_value != 0)" 的条件,因为 adc_value 可能等于 0,但这并不意味着读取 ADC 值失败。下面是修复后的代码:
```c
uint8_t read_adc_value() {
uint8_t adc_value;
R_ADC_Start();
adc_value = R_ADC_Get_Result_8bit(&adc_value);
if (adc_value != 0)
{
R_ADC_Stop();
}
return adc_value;
}
```
相关问题
#include "bflb_adc.h" #include "bflb_mtimer.h" #include "board.h" struct bflb_device_s adc; #define TEST_ADC_CHANNELS 2 #define TEST_COUNT 10 struct bflb_adc_channel_s chan[] = { { .pos_chan = ADC_CHANNEL_2, .neg_chan = ADC_CHANNEL_GND }, { .pos_chan = ADC_CHANNEL_GND, .neg_chan = ADC_CHANNEL_3 }, }; int main(void) { board_init(); board_adc_gpio_init(); adc = bflb_device_get_by_name("adc"); / adc clock = XCLK / 2 / 32 */ struct bflb_adc_config_s cfg; cfg.clk_div = ADC_CLK_DIV_32; cfg.scan_conv_mode = true; cfg.continuous_conv_mode = false; cfg.differential_mode = true; cfg.resolution = ADC_RESOLUTION_16B; cfg.vref = ADC_VREF_3P2V; bflb_adc_init(adc, &cfg); bflb_adc_channel_config(adc, chan, TEST_ADC_CHANNELS); for (uint32_t i = 0; i < TEST_COUNT; i++) { bflb_adc_start_conversion(adc); while (bflb_adc_get_count(adc) < TEST_ADC_CHANNELS) { bflb_mtimer_delay_ms(1); } for (size_t j = 0; j < TEST_ADC_CHANNELS; j++) { struct bflb_adc_result_s result; uint32_t raw_data = bflb_adc_read_raw(adc); printf("raw data:%08x\r\n", raw_data); bflb_adc_parse_result(adc, &raw_data, &result, 1); printf("pos chan %d,neg chan %d,%d mv \r\n", result.pos_chan, result.neg_chan, result.millivolt); } bflb_adc_stop_conversion(adc); bflb_mtimer_delay_ms(100); } while (1) { } }根据以上代码对bl618程序的编写对以下stm32中代码#include "stm32f10x.h" #include "delay.h" #include "FSR.h" #include "usart.h" #include "adc.h" #define PRESS_MIN 20 #define PRESS_MAX 6000 #define VOLTAGE_MIN 150 #define VOLTAGE_MAX 3300 u8 state = 0; u16 val = 0; u16 value_AD = 0; long PRESS_AO = 0; int VOLTAGE_AO = 0; long map(long x, long in_min, long in_max, long out_min, long out_max); int main(void) { delay_init(); NVIC_Configuration(); uart_init(9600); Adc_Init(); delay_ms(1000); printf("Test start\r\n"); while(1) { value_AD = Get_Adc_Average(1,10); VOLTAGE_AO = map(value_AD, 0, 4095, 0, 3300); if(VOLTAGE_AO < VOLTAGE_MIN) { PRESS_AO = 0; } else if(VOLTAGE_AO > VOLTAGE_MAX) { PRESS_AO = PRESS_MAX; } else { PRESS_AO = map(VOLTAGE_AO, VOLTAGE_MIN, VOLTAGE_MAX, PRESS_MIN, PRESS_MAX); } printf("ADÖµ = %d,µçѹ = %d mv,ѹÁ¦ = %ld g\r\n",value_AD,VOLTAGE_AO,PRESS_AO); delay_ms(500); } } long map(long x, long in_min, long in_max, long out_min, long out_max) { return (x - in_min) * (out_max - out_min) / (in_max - in_min) + out_min; }移植到bl618进行改写
以下是将上述STM32代码移植到BL618进行改写后的代码:
```c
#include "bl602.h"
#include "bl_adc.h"
#include "bl_gpio.h"
#include "bl_mtimer.h"
#include "stdio.h"
#define PRESS_MIN 20
#define PRESS_MAX 6000
#define VOLTAGE_MIN 150
#define VOLTAGE_MAX 3300
#define ADC_CHANNEL 0
#define ADC_CLK_DIV 5
#define ADC_RESOLUTION ADC_RESOLUTION_12B
#define ADC_VREF ADC_VREF_3V3
long map(long x, long in_min, long in_max, long out_min, long out_max);
int main(void)
{
bl_mtimer_init();
bl_gpio_enable_output(PIN_11, 1);
bl_adc_init();
bl_adc_config_t cfg = {
.inputMode = ADC_INPUT_SINGLE_END_MODE,
.input = ADC_INPUT_CH0,
.clkDiv = ADC_CLK_DIV,
.resolution = ADC_RESOLUTION,
.refSel = ADC_VREF,
};
bl_adc_channel_config(ADC_CHANNEL, &cfg);
printf("Test start\r\n");
while (1)
{
bl_adc_start();
while (!bl_adc_fifo_data_count())
{
bl_mtimer_delay_us(100);
}
uint16_t value_AD = bl_adc_read_fifo_data();
int VOLTAGE_AO = map(value_AD, 0, 4095, 0, 3300);
long PRESS_AO = 0;
if (VOLTAGE_AO < VOLTAGE_MIN)
{
PRESS_AO = 0;
}
else if (VOLTAGE_AO > VOLTAGE_MAX)
{
PRESS_AO = PRESS_MAX;
}
else
{
PRESS_AO = map(VOLTAGE_AO, VOLTAGE_MIN, VOLTAGE_MAX, PRESS_MIN, PRESS_MAX);
}
printf("AD value = %d, voltage = %d mV, pressure = %ld g\r\n", value_AD, VOLTAGE_AO, PRESS_AO);
bl_mtimer_delay_us(500000);
}
}
long map(long x, long in_min, long in_max, long out_min, long out_max)
{
return (x - in_min) * (out_max - out_min) / (in_max - in_min) + out_min;
}
```
在BL618中,需要使用`bl_adc_init()`进行ADC模块的初始化,并通过`bl_adc_channel_config()`配置ADC通道。需要注意的是,BL618的ADC模块不支持差分模式,因此需要将原来的差分模式改为单端模式。在进行ADC转换时,可以使用`bl_adc_start()`触发转换,并通过`bl_adc_fifo_data_count()`和`bl_adc_read_fifo_data()`获取转换结果。此外,由于BL618中没有提供延时函数,需要使用`bl_mtimer_delay_us()`进行延时。
写一个由库函数的stm32f103c8t6通过adc采样转电压的代码
以下是使用库函数的stm32f103c8t6通过ADC采样转电压的代码:
```c
#include "stm32f10x.h"
int main(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
ADC_InitTypeDef ADC_InitStructure;
// Enable peripheral clocks
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_ADC1, ENABLE);
// Configure ADC pin as analog input
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
GPIO_Init(GPIOA, &GPIO_InitStructure);
// Configure ADC
ADC_InitStructure.ADC_Mode = ADC_Mode_Independent;
ADC_InitStructure.ADC_ScanConvMode = DISABLE;
ADC_InitStructure.ADC_ContinuousConvMode = DISABLE;
ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None;
ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
ADC_InitStructure.ADC_NbrOfChannel = 1;
ADC_Init(ADC1, &ADC_InitStructure);
// Configure ADC channel
ADC_RegularChannelConfig(ADC1, ADC_Channel_0, 1, ADC_SampleTime_55Cycles5);
// Enable ADC
ADC_Cmd(ADC1, ENABLE);
// Wait for ADC to warm up
for (int i = 0; i < 1000; i++);
// Start ADC conversion
ADC_SoftwareStartConvCmd(ADC1, ENABLE);
// Wait for ADC conversion to complete
while (ADC_GetFlagStatus(ADC1, ADC_FLAG_EOC) == RESET);
// Read ADC converted value and convert to voltage
uint16_t adc_value = ADC_GetConversionValue(ADC1);
float voltage = (float)adc_value / 4096.0 * 3.3;
// Infinite loop
while (1);
}
```
这段代码使用的是ADC1的通道0进行采样,并将采样时间设置为55.5个时钟周期。采样完成后,将转换值转换为电压,并将其输出到控制台。
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