pinebuds/tests/anc_usb/mic_key.c

155 lines
4.2 KiB
C

/***************************************************************************
*
* Copyright 2015-2019 BES.
* All rights reserved. All unpublished rights reserved.
*
* No part of this work may be used or reproduced in any form or by any
* means, or stored in a database or retrieval system, without prior written
* permission of BES.
*
* Use of this work is governed by a license granted by BES.
* This work contains confidential and proprietary information of
* BES. which is protected by copyright, trade secret,
* trademark and other intellectual property rights.
*
****************************************************************************/
#ifdef CFG_MIC_KEY
#include "hal_timer.h"
#include "hal_trace.h"
#include "hwtimer_list.h"
#include "hal_iomux.h"
#include "hal_gpadc.h"
#include "analog.h"
#include "usb_audio.h"
#include "tgt_hardware.h"
#define MIC_KEY_CHK_TIMES 20
#define MIC_KEY_SKIP_CNT 8
#define MIC_KEY_CHK_INTERVAL MS_TO_TICKS(1) // in ticks
static struct {
HWTIMER_ID chk_timer;
uint16_t chk_val[MIC_KEY_CHK_TIMES-MIC_KEY_SKIP_CNT];
uint8_t chk_times;
uint8_t gpio_dn;
uint8_t key_dn[MIC_KEY_NUM];
} s_mic_key_ctx;
extern void mic_key_gpio_irq_set (void);
void mic_key_irq_hdl (uint16_t irq_val, HAL_GPADC_MV_T volt)
{
hal_gpadc_close(mic_key_gpadc_chan);
if (++s_mic_key_ctx.chk_times >= MIC_KEY_CHK_TIMES) {
uint8_t i, j;
uint32_t mean;
for (i = 0; i < MIC_KEY_NUM; i++) {
mean = 0;
for (j = 0; j < MIC_KEY_CHK_TIMES-MIC_KEY_SKIP_CNT; j++) {
mean += (uint32_t)s_mic_key_ctx.chk_val[j];
}
mean /= MIC_KEY_CHK_TIMES-MIC_KEY_SKIP_CNT;
if ((mean > mic_key_cfg_lst[i].ref_vol_low) && (mean <= mic_key_cfg_lst[i].ref_vol_high))
break;
}
if (i < MIC_KEY_NUM) {
TRACE(2,"ana_key: key[%d] matched at [%dmv]", i, mean);
usb_audio_hid_set_event(mic_key_cfg_lst[i].hid_evt, 1);
s_mic_key_ctx.key_dn[i] = 1;
} else {
TRACE(1,"ana_key: no key matched [%dmv]", mean);
}
return;
}
if (s_mic_key_ctx.chk_times > MIC_KEY_SKIP_CNT) {
s_mic_key_ctx.chk_val[s_mic_key_ctx.chk_times - MIC_KEY_SKIP_CNT - 1] = volt;
}
hwtimer_start(s_mic_key_ctx.chk_timer, MIC_KEY_CHK_INTERVAL);
}
void mic_key_gpio_det_irq_hdl (enum HAL_GPIO_PIN_T pin)
{
if (pin != mic_key_det_gpio_pin)
return;
TRACE(1,"GPIO detected at status[%d]", s_mic_key_ctx.gpio_dn);
if (s_mic_key_ctx.gpio_dn) {
uint8_t i;
for (i = 0; i < MIC_KEY_NUM; i++) {
if (s_mic_key_ctx.key_dn[i]) {
break;
}
}
if (i < MIC_KEY_NUM) {
usb_audio_hid_set_event(mic_key_cfg_lst[i].hid_evt, 0);
s_mic_key_ctx.key_dn[i] = 0;
}
s_mic_key_ctx.gpio_dn = 0;
} else {
s_mic_key_ctx.chk_times = 0;
s_mic_key_ctx.gpio_dn = 1;
hal_gpadc_open(mic_key_gpadc_chan, HAL_GPADC_ATP_ONESHOT, mic_key_irq_hdl);
}
mic_key_gpio_irq_set();
}
void mic_key_periodic_check (void* param)
{
hal_gpadc_open(mic_key_gpadc_chan, HAL_GPADC_ATP_ONESHOT, mic_key_irq_hdl);
}
void mic_key_gpio_irq_set (void)
{
struct HAL_GPIO_IRQ_CFG_T cfg;
cfg.irq_debounce = 1;
cfg.irq_enable = 1;
cfg.irq_type = HAL_GPIO_IRQ_TYPE_EDGE_SENSITIVE;
if (s_mic_key_ctx.gpio_dn) {
cfg.irq_polarity = HAL_GPIO_IRQ_POLARITY_HIGH_RISING;
} else {
cfg.irq_polarity = HAL_GPIO_IRQ_POLARITY_LOW_FALLING;
}
cfg.irq_handler = mic_key_gpio_det_irq_hdl;
hal_gpio_setup_irq(mic_key_det_gpio_pin, &cfg);
}
void mic_key_open (void)
{
struct HAL_IOMUX_PIN_FUNCTION_MAP pinmux_key_det[] = {
{0, HAL_IOMUX_FUNC_GPIO, HAL_IOMUX_PIN_VOLTAGE_MEM, HAL_IOMUX_PIN_NOPULL},
};
TRACE(1,"%s", __func__);
pinmux_key_det[0].pin = mic_key_det_gpio_pin;
hal_iomux_init(pinmux_key_det, ARRAY_SIZE(pinmux_key_det));
analog_aud_mickey_enable(true);
s_mic_key_ctx.chk_timer = hwtimer_alloc(mic_key_periodic_check, NULL);
hal_gpio_pin_set_dir(mic_key_det_gpio_pin, HAL_GPIO_DIR_IN, 0);
mic_key_gpio_irq_set();
}
#endif