209 lines
5.9 KiB
C
209 lines
5.9 KiB
C
/**
|
|
* @file main.c
|
|
* @brief
|
|
*
|
|
* Copyright (c) 2021 Bouffalolab team
|
|
*
|
|
* Licensed to the Apache Software Foundation (ASF) under one or more
|
|
* contributor license agreements. See the NOTICE file distributed with
|
|
* this work for additional information regarding copyright ownership. The
|
|
* ASF licenses this file to you under the Apache License, Version 2.0 (the
|
|
* "License"); you may not use this file except in compliance with the
|
|
* License. You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
|
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
|
|
* License for the specific language governing permissions and limitations
|
|
* under the License.
|
|
*
|
|
*/
|
|
#include "hal_adc.h"
|
|
#include "hal_gpio.h"
|
|
|
|
#define KEY0_ADC_VALUE (0)
|
|
#define KEY1_ADC_VALUE (100)
|
|
#define KEY2_ADC_VALUE (200)
|
|
#define KEY3_ADC_VALUE (300)
|
|
#define KEY4_ADC_VALUE (430)
|
|
#define KEY_NO_VALUE (3000)
|
|
#define KEY_MEASURE_OFFSET (30)
|
|
|
|
#define KEY_FILTER_NUM (200)
|
|
typedef struct
|
|
{
|
|
uint32_t vaildKeyNum;
|
|
uint16_t keyValue[KEY_FILTER_NUM];
|
|
} adc_keys_status;
|
|
|
|
adc_channel_t posChList[] = { ADC_CHANNEL8 };
|
|
adc_channel_t negChList[] = { ADC_CHANNEL_GND };
|
|
adc_channel_val_t result_val;
|
|
|
|
adc_keys_status key_machine;
|
|
|
|
struct device *adc_key;
|
|
|
|
uint32_t adc_value[2] = { 0 };
|
|
uint32_t key_voltage = 0;
|
|
|
|
/**
|
|
* @brief init adc key machine
|
|
*
|
|
*/
|
|
static void key_machine_init(void)
|
|
{
|
|
key_machine.vaildKeyNum = 0;
|
|
memset(key_machine.keyValue, 0xff, KEY_FILTER_NUM * 2);
|
|
}
|
|
|
|
/**
|
|
* @brief Get the adc value range object
|
|
*
|
|
* @param Vmv input adc value ,unit is mV
|
|
* @return uint16_t
|
|
*/
|
|
static uint16_t get_adc_value_range(uint32_t Vmv)
|
|
{
|
|
if (Vmv > KEY4_ADC_VALUE - KEY_MEASURE_OFFSET && Vmv < KEY4_ADC_VALUE + KEY_MEASURE_OFFSET) {
|
|
return KEY4_ADC_VALUE;
|
|
} else if (Vmv > KEY3_ADC_VALUE - KEY_MEASURE_OFFSET && Vmv < KEY3_ADC_VALUE + KEY_MEASURE_OFFSET) {
|
|
return KEY3_ADC_VALUE;
|
|
} else if (Vmv > KEY2_ADC_VALUE - KEY_MEASURE_OFFSET && Vmv < KEY2_ADC_VALUE + KEY_MEASURE_OFFSET) {
|
|
return KEY2_ADC_VALUE;
|
|
} else if (Vmv > KEY1_ADC_VALUE - KEY_MEASURE_OFFSET && Vmv < KEY1_ADC_VALUE + KEY_MEASURE_OFFSET) {
|
|
return KEY1_ADC_VALUE;
|
|
} else if (Vmv < KEY_MEASURE_OFFSET) {
|
|
return KEY0_ADC_VALUE;
|
|
} else {
|
|
return KEY_NO_VALUE;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @brief Get the adc key value object
|
|
*
|
|
* @param Vmv input adc value ,unit is mV
|
|
* @return int
|
|
*/
|
|
static int get_adc_key_value(uint32_t Vmv)
|
|
{
|
|
volatile uint16_t key_num[5] = { 0 };
|
|
uint8_t bigger = 0, i = 0, j = 0;
|
|
|
|
if (Vmv >= KEY0_ADC_VALUE && Vmv <= KEY4_ADC_VALUE + KEY_MEASURE_OFFSET) {
|
|
key_machine.keyValue[key_machine.vaildKeyNum] = get_adc_value_range(Vmv);
|
|
key_machine.vaildKeyNum++;
|
|
|
|
if (key_machine.vaildKeyNum > KEY_FILTER_NUM) {
|
|
for (i = 0; i < KEY_FILTER_NUM; i++) {
|
|
//Count the most Key Value
|
|
switch (key_machine.keyValue[i]) {
|
|
case KEY0_ADC_VALUE:
|
|
key_num[0]++;
|
|
break;
|
|
|
|
case KEY1_ADC_VALUE:
|
|
key_num[1]++;
|
|
break;
|
|
|
|
case KEY2_ADC_VALUE:
|
|
key_num[2]++;
|
|
break;
|
|
|
|
case KEY3_ADC_VALUE:
|
|
key_num[3]++;
|
|
break;
|
|
|
|
case KEY4_ADC_VALUE:
|
|
key_num[4]++;
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
for (i = 0; i < 5; i++) {
|
|
for (j = 0; j < 5; j++) {
|
|
if (key_num[i] >= key_num[j]) {
|
|
bigger = 1;
|
|
} else {
|
|
bigger = 0;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (bigger) {
|
|
key_machine_init();
|
|
return i;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
return KEY_NO_VALUE;
|
|
}
|
|
|
|
// uint32_t sum = 0;
|
|
// static uint32_t adc_val_filter(void)
|
|
// {
|
|
// static uint32_t cnt_filter = 0;
|
|
// static uint32_t volt_value = 0;
|
|
|
|
// volt_value += adc_value[0];
|
|
|
|
// if( ++cnt_filter >= 20)
|
|
// {
|
|
// cnt_filter = 0;
|
|
// key_voltage = (volt_value / 20 * 30 + key_voltage * 70) / 100;
|
|
// volt_value = 0;
|
|
// }
|
|
// }
|
|
|
|
int main(void)
|
|
{
|
|
bflb_platform_init(0);
|
|
uint16_t keyValue = 0;
|
|
|
|
adc_channel_cfg_t adc_channel_cfg;
|
|
|
|
adc_channel_cfg.pos_channel = posChList;
|
|
adc_channel_cfg.neg_channel = negChList;
|
|
adc_channel_cfg.num = 1;
|
|
|
|
adc_register(ADC0_INDEX, "adc_key");
|
|
|
|
adc_key = device_find("adc_key");
|
|
|
|
if (adc_key) {
|
|
ADC_DEV(adc_key)->continuous_conv_mode = ENABLE;
|
|
device_open(adc_key, DEVICE_OFLAG_STREAM_RX);
|
|
|
|
if (device_control(adc_key, DEVICE_CTRL_ADC_CHANNEL_CONFIG, &adc_channel_cfg) == ERROR) {
|
|
MSG("ADC channel config error , Please check the channel corresponding to IO is initial success by board system or Channel is invaild \r\n");
|
|
BL_CASE_FAIL;
|
|
while (1)
|
|
;
|
|
}
|
|
|
|
} else {
|
|
MSG("device open failed\r\n");
|
|
}
|
|
|
|
key_machine_init();
|
|
|
|
adc_channel_start(adc_key);
|
|
|
|
while (1) {
|
|
device_read(adc_key, 0, (void *)&result_val, 1); /*max size is 32*/
|
|
keyValue = get_adc_key_value(result_val.volt * 1000);
|
|
|
|
if (keyValue != KEY_NO_VALUE) {
|
|
MSG("key %d pressed\r\n", keyValue);
|
|
MSG("result_val.volt: %0.2f mv\n", (result_val.volt * 1000));
|
|
}
|
|
}
|
|
} |