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/*
* Copyright (c) 2006-2021, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2020-11-26 bigmagic first version
*/
#include <rtthread.h>
#include <rtdevice.h>
#include "mbox.h"
#include "drv_dsi_touch.h"
#define DBG_TAG "dsi_touch"
#define DBG_LVL DBG_INFO
#include <rtdbg.h>
static rt_touch_t touch_device = RT_NULL;
static struct rt_semaphore dsi_touch_ack;
static rt_uint32_t touch_x;
static rt_uint32_t touch_y;
static rt_uint32_t touch_state;
static rt_thread_t dsi_touch_tid = RT_NULL;
#define DSI_TOUCH_THREAD_STACK_SIZE (4096)
#define DSI_TOUCH_THREAD_PRIORITY (25)
#define DSI_TOUCH_THREAD_TIMESLICE (10)
#define MAXIMUM_SUPPORTED_POINTS (10)
struct touch_regs
{
uint8_t device_mode;
uint8_t gesture_id;
uint8_t num_points;
struct touch
{
uint8_t xh;
uint8_t xl;
uint8_t yh;
uint8_t yl;
uint8_t res1;
uint8_t res2;
} point[MAXIMUM_SUPPORTED_POINTS];
};
static void dsi_touch_thread_entry(void *param)
{
static volatile uint32_t touchbuf;
touchbuf = bcm271x_mbox_get_touch(); //0x0f436000
if(touchbuf == RT_NULL)
{
rt_kprintf("init dsi touch err!\n");
return;
}
while (1)
{
struct touch_regs *regs = (struct touch_regs *)touchbuf;
if ((regs->num_points > 0) && (regs->num_points < MAXIMUM_SUPPORTED_POINTS))
{
//only one touch point
touch_x = (((int)regs->point[0].xh & 0xf) << 8) + regs->point[0].xl;
touch_y = (((int)regs->point[0].yh & 0xf) << 8) + regs->point[0].yl;
touch_state = 1;
}
else
{
touch_state = 0;
}
rt_thread_mdelay(50);
}
}
static rt_ssize_t dsi_read_point(struct rt_touch_device *touch, void *buf, rt_size_t read_num)
{
rt_uint16_t* touchxy = (rt_uint16_t *)buf;
if((read_num != 0) && (touch_state == 1))
{
touchxy[0] = touch_x;
touchxy[1] = touch_y;
touch_state = 0;
return read_num;
}
else
{
return 0;
}
}
static rt_err_t dsi_control(struct rt_touch_device *device, int cmd, void *data)
{
return RT_EOK;
}
static struct rt_touch_ops dsi_touch_ops =
{
.touch_readpoint = dsi_read_point,
.touch_control = dsi_control,
};
static int hw_dsi_touch_init(void)
{
//touch sem
rt_sem_init(&dsi_touch_ack, "dsi_touch_ack", 0, RT_IPC_FLAG_FIFO);
dsi_touch_tid = rt_thread_create("dsi_touch",
dsi_touch_thread_entry, RT_NULL,
DSI_TOUCH_THREAD_STACK_SIZE,
DSI_TOUCH_THREAD_PRIORITY, DSI_TOUCH_THREAD_TIMESLICE);
if (dsi_touch_tid != RT_NULL)
rt_thread_startup(dsi_touch_tid);
touch_device = (rt_touch_t)rt_calloc(1, sizeof(struct rt_touch_device));
if (touch_device == RT_NULL)
return -RT_ERROR;
/* register touch device */
touch_device->info.type = RT_TOUCH_TYPE_RESISTANCE;
touch_device->info.vendor = RT_TOUCH_VENDOR_UNKNOWN;
//rt_memcpy(&touch_device->config, cfg, sizeof(struct rt_touch_config));
touch_device->ops = &dsi_touch_ops;
rt_hw_touch_register(touch_device, "dsi_touch", RT_DEVICE_FLAG_INT_RX, RT_NULL);
return 0;
}
INIT_DEVICE_EXPORT(hw_dsi_touch_init);
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