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/**************************************************************************//**
* @copyright (C) 2020 Nuvoton Technology Corp. All rights reserved.
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2022-02-22 Wayne First version
*
******************************************************************************/
#include <rtthread.h>
#if defined(NU_PKG_USING_ADC_TOUCH_SW)
#include "rtdevice.h"
#include "touch_sw.h"
/* Private define ---------------------------------------------------------------*/
#define DEF_ADC_TOUCH_SMPL_TICK 40
#define TOUCH_MQ_LENGTH 32
/* Private Typedef --------------------------------------------------------------*/
static rt_timer_t g_psRtTouchMenuTimer;
static rt_mq_t g_pmqTouchXYZ;
static S_TOUCH_SW *g_psTouchSW = RT_NULL;
static rt_bool_t bDoSmpling = RT_FALSE;
struct nu_adc_touch_data
{
uint32_t u32X;
uint32_t u32Y;
uint32_t u32Z0;
uint32_t u32Z1;
};
typedef struct nu_adc_touch_data *nu_adc_touch_data_t;
static rt_uint32_t Get_X(S_TOUCH_SW *psTouchSW)
{
/*=== Get X from ADC input ===*/
rt_pin_mode(psTouchSW->pin[evXR], PIN_MODE_OUTPUT);
rt_pin_mode(psTouchSW->pin[evYD], PIN_MODE_INPUT);
rt_pin_mode(psTouchSW->pin[evXL], PIN_MODE_OUTPUT);
rt_pin_write(psTouchSW->pin[evXR], PIN_HIGH);
rt_pin_write(psTouchSW->pin[evXL], PIN_LOW);
psTouchSW->switch_to_digital(psTouchSW->pin[evXR]);
psTouchSW->switch_to_digital(psTouchSW->pin[evYD]);
psTouchSW->switch_to_digital(psTouchSW->pin[evXL]);
/* Disable the digital input path to avoid the leakage current. */
/* Configure the ADC analog input pins. */
psTouchSW->switch_to_analog(psTouchSW->pin[evYU]);
return rt_adc_read((rt_adc_device_t)psTouchSW->adc, psTouchSW->i32ADCChnYU) & 0x0FFF;
}
static rt_uint32_t Get_Y(S_TOUCH_SW *psTouchSW)
{
/*=== Get Y from ADC input ===*/
rt_pin_mode(psTouchSW->pin[evYU], PIN_MODE_OUTPUT);
rt_pin_mode(psTouchSW->pin[evYD], PIN_MODE_OUTPUT);
rt_pin_mode(psTouchSW->pin[evXL], PIN_MODE_INPUT);
rt_pin_write(psTouchSW->pin[evYU], PIN_HIGH);
rt_pin_write(psTouchSW->pin[evYD], PIN_LOW);
psTouchSW->switch_to_digital(psTouchSW->pin[evYU]);
psTouchSW->switch_to_digital(psTouchSW->pin[evYD]);
psTouchSW->switch_to_digital(psTouchSW->pin[evXL]);
/* Disable the digital input path to avoid the leakage current. */
/* Configure the ADC analog input pins. */
psTouchSW->switch_to_analog(psTouchSW->pin[evXR]);
return rt_adc_read((rt_adc_device_t)psTouchSW->adc, psTouchSW->i32ADCChnXR) & 0x0FFF;
}
static void nu_adc_touch_smpl(void *p)
{
static rt_bool_t bDrop = RT_FALSE;
static uint32_t u32LastZ0 = 0xffffu;
struct nu_adc_touch_data point;
S_TOUCH_SW *psTouchSW;
if (!bDoSmpling)
return ;
psTouchSW = (S_TOUCH_SW *)p;
rt_memset(&point, 0, sizeof(struct nu_adc_touch_data));
/* Get X, Y ADC converting data */
point.u32X = Get_X(psTouchSW);
point.u32Y = Get_Y(psTouchSW);
if ((point.u32X < 4000) && (point.u32Y < 4000))
{
point.u32Z0 = point.u32Z1 = 1;
bDrop = RT_FALSE;
}
else
{
bDrop = RT_TRUE;
}
// rt_kprintf("%04x %04x %d %d\n", point.u32X, point.u32Y, point.u32Z0, bDrop);
if ((!bDrop || (u32LastZ0 != 0)) && (rt_mq_send(g_pmqTouchXYZ, (const void *)&point, sizeof(struct nu_adc_touch_data)) == RT_EOK))
{
if (psTouchSW->psRtTouch != RT_NULL)
rt_hw_touch_isr(psTouchSW->psRtTouch);
}
u32LastZ0 = point.u32Z0;
}
int32_t nu_adc_touch_read_xyz(uint32_t *bufX, uint32_t *bufY, uint32_t *bufZ0, uint32_t *bufZ1, int32_t dataCnt)
{
int i;
struct nu_adc_touch_data value;
for (i = 0 ; i < dataCnt; i++)
{
if (rt_mq_recv(g_pmqTouchXYZ, (void *)&value, sizeof(struct nu_adc_touch_data), 0) == -RT_ETIMEOUT)
break;
bufX[i] = value.u32X;
bufY[i] = value.u32Y;
bufZ0[i] = value.u32Z0;
bufZ1[i] = value.u32Z1;
}
return i;
}
void nu_adc_touch_detect(rt_bool_t bStartDetect)
{
}
rt_err_t nu_adc_touch_enable(rt_touch_t psRtTouch)
{
if (g_psTouchSW->adc)
{
g_psTouchSW->psRtTouch = psRtTouch;
rt_adc_enable((rt_adc_device_t)g_psTouchSW->adc, g_psTouchSW->i32ADCChnXR);
rt_adc_enable((rt_adc_device_t)g_psTouchSW->adc, g_psTouchSW->i32ADCChnYU);
bDoSmpling = RT_TRUE;
/* Start sampling procedure. */
rt_timer_start(g_psRtTouchMenuTimer);
return RT_EOK;
}
return -RT_ERROR;
}
rt_err_t nu_adc_touch_disable(void)
{
if (g_psTouchSW->adc)
{
/* Stop sampling procedure. */
rt_timer_stop(g_psRtTouchMenuTimer);
bDoSmpling = RT_FALSE;
rt_adc_disable((rt_adc_device_t)g_psTouchSW->adc, g_psTouchSW->i32ADCChnXR);
rt_adc_disable((rt_adc_device_t)g_psTouchSW->adc, g_psTouchSW->i32ADCChnYU);
g_psTouchSW->psRtTouch = RT_NULL;
return RT_EOK;
}
return -RT_ERROR;
}
rt_err_t nu_adc_touch_sw_register(S_TOUCH_SW *psTouchSW)
{
RT_ASSERT(psTouchSW);
psTouchSW->adc = rt_device_find(psTouchSW->adc_name);
RT_ASSERT(psTouchSW->adc);
g_pmqTouchXYZ = rt_mq_create("ADC_TOUCH_SW", sizeof(struct nu_adc_touch_data), TOUCH_MQ_LENGTH, RT_IPC_FLAG_FIFO);
RT_ASSERT(g_pmqTouchXYZ);
g_psRtTouchMenuTimer = rt_timer_create("TOUCH_SMPL_TIMER", nu_adc_touch_smpl, (void *)psTouchSW, DEF_ADC_TOUCH_SMPL_TICK, RT_TIMER_FLAG_PERIODIC);
RT_ASSERT(g_psRtTouchMenuTimer);
g_psTouchSW = psTouchSW;
return RT_EOK;
}
#endif //#if defined(NU_PKG_USING_ADC_TOUCH_SW)
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