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/*
* Copyright (c) 2006-2023, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2022-07-28 Rbb666 first version
*/
#include <rtthread.h>
#include "drv_common.h"
#ifdef BSP_USING_SLIDER
#include "cycfg_capsense.h"
#define CAPSENSE_INTR_PRIORITY (7u)
#define EZI2C_INTR_PRIORITY (6u)
/* Allowed duty cycle for maximum brightness */
#define LED_MAX_BRIGHTNESS (100u)
/* Allowed duty cycle for minimum brightness*/
#define LED_MIN_BRIGHTNESS (0u)
#define GET_DUTY_CYCLE(x) (1 * 1000 * 1000 - x * 10 * 1000)
typedef enum
{
LED_OFF,
LED_ON
} led_state_t;
typedef struct
{
led_state_t state;
uint32_t brightness;
} led_data_t;
static rt_sem_t trans_done_semphr = RT_NULL;
static rt_thread_t sld_thread = RT_NULL;
#ifndef RT_USING_PWM
#error You need enable PWM to use this sample
#else
#define PWM_DEV_NAME "pwm0"
#define PWM_DEV_CHANNEL 0
static struct rt_device_pwm *pwm_dev;
#endif
static void capsense_isr(void)
{
/* enter interrupt */
rt_interrupt_enter();
Cy_CapSense_InterruptHandler(CYBSP_CSD_HW, &cy_capsense_context);
/* leave interrupt */
rt_interrupt_leave();
}
void capsense_callback(cy_stc_active_scan_sns_t *ptrActiveScan)
{
rt_sem_release(trans_done_semphr);
}
static uint32_t initialize_capsense(void)
{
uint32_t status = CYRET_SUCCESS;
/* CapSense interrupt configuration parameters */
static const cy_stc_sysint_t capSense_intr_config = {
.intrSrc = csd_interrupt_IRQn,
.intrPriority = CAPSENSE_INTR_PRIORITY,
};
/* Capture the CSD HW block and initialize it to the default state. */
status = Cy_CapSense_Init(&cy_capsense_context);
if (CYRET_SUCCESS != status)
{
return status;
}
/* Initialize CapSense interrupt */
cyhal_system_set_isr(csd_interrupt_IRQn, csd_interrupt_IRQn, CAPSENSE_INTR_PRIORITY, &capsense_isr);
NVIC_ClearPendingIRQ(capSense_intr_config.intrSrc);
NVIC_EnableIRQ(capSense_intr_config.intrSrc);
/* Initialize the CapSense firmware modules. */
status = Cy_CapSense_Enable(&cy_capsense_context);
if (CYRET_SUCCESS != status)
{
return status;
}
/* Assign a callback function to indicate end of CapSense scan. */
status = Cy_CapSense_RegisterCallback(CY_CAPSENSE_END_OF_SCAN_E,
capsense_callback, &cy_capsense_context);
if (CYRET_SUCCESS != status)
{
return status;
}
return status;
}
void Slider_Init(void)
{
cy_rslt_t result;
result = initialize_capsense();
if (CYRET_SUCCESS != result)
{
/* Halt the CPU if CapSense initialization failed */
RT_ASSERT(0);
}
/* Initiate first scan */
Cy_CapSense_ScanAllWidgets(&cy_capsense_context);
trans_done_semphr = rt_sem_create("slider_sem", 0, RT_IPC_FLAG_PRIO);
if (trans_done_semphr == RT_NULL)
{
rt_kprintf("create transform done semphr failed.\n");
RT_ASSERT(0);
return;
}
#ifdef BSP_USING_PWM0_CH0_PORT0
/* Initiate PWM*/
pwm_dev = (struct rt_device_pwm *)rt_device_find(PWM_DEV_NAME);
if (pwm_dev == RT_NULL)
{
rt_kprintf("PWM init failed! can't find %s device!\n", PWM_DEV_NAME);
RT_ASSERT(0);
}
/*default period:1ms pulse:0*/
rt_pwm_set(pwm_dev, PWM_DEV_CHANNEL, 1 * 1000 * 1000, 1 * 1000 * 1000);
rt_pwm_enable(pwm_dev, PWM_DEV_CHANNEL);
#endif
}
void update_led_state(led_data_t *ledData)
{
if (ledData->brightness >= 0)
{
uint32_t brightness = (ledData->brightness < LED_MIN_BRIGHTNESS) ? LED_MIN_BRIGHTNESS : ledData->brightness;
/* Drive the LED with brightness */
rt_pwm_set(pwm_dev, PWM_DEV_CHANNEL, 1 * 1000 * 1000, GET_DUTY_CYCLE(brightness));
}
}
static void process_touch(void)
{
cy_stc_capsense_touch_t *slider_touch_info;
uint16_t slider_pos;
uint8_t slider_touch_status;
bool led_update_req = false;
static uint16_t slider_pos_prev;
static led_data_t led_data = { LED_ON, LED_MAX_BRIGHTNESS };
/* Get slider status */
slider_touch_info = Cy_CapSense_GetTouchInfo(
CY_CAPSENSE_LINEARSLIDER0_WDGT_ID, &cy_capsense_context);
slider_touch_status = slider_touch_info->numPosition;
slider_pos = slider_touch_info->ptrPosition->x;
/* Detect the new touch on slider */
if ((RT_NULL != slider_touch_status) &&
(slider_pos != slider_pos_prev))
{
led_data.brightness = (slider_pos * 100) / cy_capsense_context.ptrWdConfig[CY_CAPSENSE_LINEARSLIDER0_WDGT_ID].xResolution;
led_update_req = true;
}
#ifndef RT_USING_PWM
#error You need enable PWM to use this sample
#else
/* Update the LED state if requested */
if (led_update_req)
{
update_led_state(&led_data);
}
#endif
slider_pos_prev = slider_pos;
}
static void Slider_thread_entry(void *parameter)
{
Slider_Init();
for (;;)
{
rt_sem_take(trans_done_semphr, RT_WAITING_FOREVER);
/* Process all widgets */
Cy_CapSense_ProcessAllWidgets(&cy_capsense_context);
/* Process touch input */
process_touch();
/* Establishes synchronized operation between the CapSense
* middleware and the CapSense Tuner tool.
*/
Cy_CapSense_RunTuner(&cy_capsense_context);
/* Initiate next scan */
Cy_CapSense_ScanAllWidgets(&cy_capsense_context);
rt_thread_mdelay(50);
}
}
int Slider_ctrl_sample(void)
{
rt_err_t ret = RT_EOK;
sld_thread = rt_thread_create("slider_th",
Slider_thread_entry,
RT_NULL,
1024,
25,
10);
if (sld_thread != RT_NULL)
{
rt_thread_startup(sld_thread);
}
else
{
ret = -RT_ERROR;
}
return ret;
}
MSH_CMD_EXPORT(Slider_ctrl_sample, Slider sample to ctrl led);
#endif
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