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