Application Layer vs Module Driver Layer Function Correspondence Table

The following table shows the operations at various application layers (here, the application layer refers to the rt_device layer calls) and the corresponding events occurring in the underlying driver：

Application layer operations for the screen and their corresponding low-level function calls

Process of opening the screen call

应用层调用函数：

rt_device_open(lcd_device, RT_DEVICE_OFLAG_RDWR); //打开屏幕

顺序	驱动层调用函数	函数在文件路径	描述
1	BSP_LCD_PowerUp(void);	bsp_lcd_tp.c	Power up the screen
2	LCD_Init(hlcdc)	nv3051f1.c	Screen driver initialization function
3	LCD_ReadID(hlcdc)	nv3051f1.c	Screen presence detection（开机检测1次）

Process of closing the screen call

应用层调用函数：

rt_device_close(lcd_device); //关闭屏幕

顺序	驱动层调用函数	函数在文件路径	描述
1	LCD_DisplayOff(hlcdc)	nv3051f1.c	Turn off the LCD
2	LCD_SetBrightness(hlcdc, br)	nv3051f1.c	Set backlight brightness to 0
3	BSP_LCD_PowerDown(void);	bsp_lcd_tp.c	Power down the screen

Set the screen data receiving area

应用层调用函数：

rt_graphix_ops(lcd_device)->set_window(0,0,239,319); //设置起始坐标为{0,0}，高宽为240x320的接收区域

顺序	驱动层调用函数	函数在文件路径	描述
1	LCD_SetRegion(hlcdc, Xpos0, Ypos0, Xpos1, Ypos1)	nv3051f1.c	Set the screen reception area

Push Framebuffer to the screen

应用层调用函数：

uint8_t framebuffer[240*320];
rt_graphix_ops(lcd_device)->draw_rect_async((const char *)&frambuffer, 0,0,239,319); //推送起始坐标为{0,0}，高宽为240x320的Framebuffer到屏幕

顺序	驱动层调用函数	函数在文件路径	描述
1	LCD_WriteMultiplePixels(hlcdc, const uint8_t *RGBCode, Xpos0, Ypos0, Xpos1, Ypos1)	nv3051f1.c	Push Framebuffer to the screen

Set screen brightness

应用层调用函数：

uint8_t brightness = 100;//背光亮度百分比值
rt_device_control(lcd_device, RTGRAPHIC_CTRL_SET_BRIGHTNESS, &brightness); //Set backlight brightness

顺序	驱动层调用函数	函数在文件路径	描述
1	LCD_SetBrightness(hlcdc, br)	nv3051f1.c	Set backlight brightness
2	LCD_DisplayOn(hlcdc)	nv3051f1.c	Turn on the LCD screen

Application layer operations for TP and their corresponding low-level function calls

Open the TP device

rt_device_open(touch_device, RT_DEVICE_FLAG_RDONLY); //Open the TP device

顺序	驱动层调用函数	函数在文件路径	描述
1	BSP_TP_PowerUp	bsp_lcd_tp.c	Touch power up
2	rt_bool_t probe(void)	gt911.c	Touch presence detection（只做1次）
3	rt_err_t init(void)	gt911.c	Touch initialization

Close the TP device

rt_device_close(touch_device); //Close the TP device

顺序	驱动层调用函数	函数在文件路径	描述
1	rt_err_t deinit(void)	gt911.c	Touch deinitialization
2	BSP_TP_PowerUp	bsp_lcd_tp.c	Touch power up

Read TP data points

struct touch_message touch_data;
rt_device_read(touch_device, 0, &touch_data, 1); //Read TP data points

顺序	驱动层调用函数	函数在文件路径	描述
1	rt_err_t read_point(touch_msg_t p_msg)	gt911.c	Touch read data point