added by Jeff Rowberg 2013-05-07: Arduino Wire-style "beginTransmission" function (takes 7-bit device address like the Wire method, NOT 8-bit: 0x68, n

* Add an object to a group * @param group pointer to a group * @param obj pointer to an object to add */

* Get the last point of an input device (for LV_INDEV_TYPE_POINTER and LV_INDEV_TYPE_BUTTON) * @param indev pointer to an input device * @param poin

* Get the type of an input device * @param indev pointer to an input device * @return the type of the input device from `lv_hal_indev_type_t` (`LV_I

* Set a style of a list * @param list pointer to a list object * @param type which style should be set * @param style pointer to a style */

* Set the y coordinate of a object * @param obj pointer to an object * @param y new distance from the top of the parent */

* Set the scroll bar mode on a page * @param page pointer to a page object * @param sb_mode the new mode from 'lv_page_sb.mode_t' enum */

* Get the page (content area) of a tab * @param tabview pointer to Tab view object * @param id index of the btn (>= 0) * @return pointer to page (l

* Get the align attribute * @param label pointer to a label object * @return LV_LABEL_ALIGN_LEFT or LV_LABEL_ALIGN_CENTER */

* Set the x coordinate of a object * @param obj pointer to an object * @param x new distance from the left side from the parent */

* @brief Enables or disables the Low Speed APB (APB1) peripheral clock. * @note After reset, the peripheral clock (used for registers read/write

* @brief 读取引脚电平 * @param Pin: 引脚编号 * @retval 引脚电平 */

* Get the common parts of two areas * @param res_p pointer to an area, the result will be stored here * @param a1_p pointer to the first area * @pa

* Set a new map. Buttons will be created/deleted according to the map. The * button matrix keeps a reference to the map and so the string array must

* Set the style of a container * @param cont pointer to a container object * @param type which style should be set (can be only `LV_CONT_STYLE_MAIN`

* Delete 'obj' and all of its children * @param obj pointer to an object to delete * @return LV_RES_INV because the object is deleted */

* Set a style of a slider * @param slider pointer to a slider object * @param type which style should be set * @param style pointer to a style */

* Set the value of a cell. * @param table pointer to a Table object * @param row id of the row [0 .. row_cnt -1] * @param col id of the column [0 .

* @brief 将数字HIGH(1)或LOW(0)值写入数字引脚 * @param Pin:引脚编号 * @param val: 写入值 * @retval 无 */

* Get the width of a glyph with kerning * @param font pointer to a font * @param letter an UNICODE letter * @param letter_next the next letter afte

* Get the style of an label object * @param label pointer to an label object * @param type which style should be get (can be only `LV_LABEL_STYLE_MA

* Set a new formatted text for a label. Memory will be allocated to store the text by the label. * @param label pointer to a label object * @param f

* Return with head node of the linked list * @param ll_p pointer to linked list * @return pointer to the head of 'll_p' */

* Insert a text to the current cursor position * @param ta pointer to a text area object * @param txt a '\0' terminated string to insert */

* Get the current state of the button * @param btn pointer to a button object * @return the state of the button (from lv_btn_state_t enum) */

* Allocate and add a data series to the chart * @param chart pointer to a chart object * @param color color of the data series * @return pointer to

* Set the cursor type. * @param ta pointer to a text area object * @param cur_type: element of 'lv_ta_cursor_type_t' */

* Create a new lv_task * @param task_xcb a callback which is the task itself. It will be called periodically. * (the 'x' in the argu

* Get the elapsed milliseconds since a previous time stamp * @param prev_tick a previous time stamp (return value of systick_get() ) * @return the e

* @brief Configures the AES-CCM and AES-GCM phases * @note This function is used only with AES-CCM or AES-GCM Algorithms * @param CRYP_Phase

* Set a style of a calendar. * @param calendar pointer to calendar object * @param type which style should be set * @param style pointer to a style

* Refresh the size of drop down list according to its status (open or closed) * @param ddlist pointer to a drop down list object * @param anim Chang

* Get the default display * @return pointer to the default display */

* Get the current mode (edit or navigate). * @param group pointer to group * @return true: edit mode; false: navigate mode */

* Get the focused object or NULL if there isn't one * @param group pointer to a group * @return pointer to the focused object */

* Create a text area objects * @param par pointer to an object, it will be the parent of the new text area * @param copy pointer to a text area obje

* Delete a the left character from the current cursor position * @param ta pointer to a text area object */

* @brief Programs a half word (16-bit) at a specified address. * @note This function must be used when the device voltage range is from 2.1V to

* Set the fit policy horizontally and vertically separately. * It tells how to change the container's size automatically. * @param cont pointer to a

* Draw a line * @param point1 first point of the line * @param point2 second point of the line * @param mask the line will be drawn only on this ar

* Iterate through the children of an object (start from the "oldest") * @param obj pointer to an object * @param child NULL at first call to get the

* Get the hidden attribute of an object * @param obj pointer to an object * @return true: the object is hidden */

* Check at least one bit of a given protect bitfield is set * @param obj pointer to an object * @param prot protect bits to test ('OR'ed values of `

* Give the length of a text with a given font * @param txt a '\0' terminate string * @param length length of 'txt' in byte count and not characters

* Add control button to the header of the window * @param win pointer to a window object * @param img_src an image source ('lv_img_t' variable, path

* Set a style of a window * @param win pointer to a window object * @param type which style should be set * @param style pointer to a style */

* @brief Checks whether the CAN interrupt has occurred or not. * @param CAN_Reg: specifies the CAN interrupt register to check. * @param It_Bit

\brief Instruction Synchronization Barrier Instruction Synchronization Barrier flushes the pipeline in the processor, so that all instructio

* Set a layout on a container * @param cont pointer to a container object * @param layout a layout from 'lv_cont_layout_t' */

* Refresh the label with its text stored in its extended data * @param label pointer to a label object */

* Set the align of the label (left or center) * @param label pointer to a label object * @param align 'LV_LABEL_ALIGN_LEFT' or 'LV_LABEL_ALIGN_LEFT'

* Get the next button from list. (Starts from the top button) * @param list pointer to a list object * @param prev_btn pointer to button. Search the

* Get the previous button from list. (Starts from the bottom button) * @param list pointer to a list object * @param prev_btn pointer to button. Sea

* Make a button selected * @param list pointer to a list object * @param btn pointer to a button to select * NULL to not select any butt

* Return with the pointer of the next node after 'n_act' * @param ll_p pointer to linked list * @param n_act pointer a node * @return pointer to th

* Remove the node 'node_p' from 'll_p' linked list. * It does not free the the memory of node. * @param ll_p pointer to the linked list of 'node_p'

* Delete all children of an object * @param obj pointer to an object */

* Mark an area of an object as invalid. * This area will be redrawn by 'lv_refr_task' * @param obj pointer to an object * @param area the area to r

* Hide an object. It won't be visible and clickable. * @param obj pointer to an object * @param en true: hide the object */

* Get the active screen of the default display * @return pointer to the active screen */

* Set a new value on the slider * @param slider pointer to a slider object * @param value new value * @param anim LV_ANIM_ON: set the value with an

* Register an object on the tileview. The register object will able to slide the tileview * @param tileview pointer to a Tileview object * @param el

* @brief Flushes the IN and OUT FIFOs (that is read and write pointers of the * FIFOs are reset) * @note The FIFOs must be flushed onl

* @brief Initializes the CRYP peripheral according to the specified parameters * in the CRYP_InitStruct. * @param CRYP_InitStruct: point

* @brief Initializes the CRYP Keys according to the specified parameters in * the CRYP_KeyInitStruct. * @param CRYP_KeyInitStruct: point

* @brief Enables or disables the specified SPI peripheral. * @param SPIx: where x can be 1, 2, 3, 4, 5 or 6 to select the SPI peripheral. * @par

* Set a style of a check box * @param cb pointer to check box object * @param type which style should be set * @param style pointer to a style *

* Initialize a display buffer * @param disp_buf pointer `lv_disp_buf_t` variable to initialize * @param buf1 A buffer to be used by LittlevGL to dra

* Send a 'LV_SIGNAL_REFR_EXT_SIZE' signal to the object * @param obj pointer to an object */

* Set the fit policy horizontally and vertically separately. * It tell how to change the page size automatically. * @param page pointer to a page ob

* @brief Returns the last stored variable data, if found, * which correspond to the passed virtual address * @param Address: Variable vi

* @brief Changes the mapping of the specified pin. * @param GPIOx: where x can be (A..K) to select the GPIO peripheral for STM32F405xx/407xx and S

* @brief Enables or disables the High Speed APB (APB2) peripheral clock. * @note After reset, the peripheral clock (used for registers read/write

\brief No Operation No Operation does nothing. This instruction can be used for code alignment purposes. */

* Initialize an area * @param area_p pointer to an area * @param x1 left coordinate of the area * @param y1 top coordinate of the area * @param x2

* Set a new value on the bar * @param bar pointer to a bar object * @param value new value * @param anim LV_ANIM_ON: set the value with an animatio

* Create a check box objects * @param par pointer to an object, it will be the parent of the new check box * @param copy pointer to a check box obje

* Create a chart background objects * @param par pointer to an object, it will be the parent of the new chart background * @param copy pointer to a

* Set a style of a drop down list * @param ddlist pointer to a drop down list object * @param type which style should be set * @param style pointer

* Add a horizontal anti-aliasing segment (pixels with decreasing opacity) * @param x start point x coordinate * @param y start point y coordinate *

* Add a vertical anti-aliasing segment (pixels with decreasing opacity) * @param x start point x coordinate * @param y start point y coordinate *

* Set a style of a keyboard * @param kb pointer to a keyboard object * @param type which style should be set * @param style pointer to a style */

* Enable the recoloring by in-line commands * @param label pointer to a label object * @param en true: enable recoloring, false: disable */

* Initialize linked list * @param ll_dsc pointer to ll_dsc variable * @param node_size the size of 1 node in bytes */

* Move and object to the foreground * @param obj pointer to an object */

* Set the display which is being refreshed. * It shouldn1t be used directly by the user. * It can be used to trick the drawing functions about there

* Create a slider objects * @param par pointer to an object, it will be the parent of the new slider * @param copy pointer to a slider object, if no

* Create a Tab view object * @param par pointer to an object, it will be the parent of the new tab * @param copy pointer to a tab object, if not NUL

* Get size of a text * @param size_res pointer to a 'point_t' variable to store the result * @param text pointer to a text * @param font pinter to

* Set the 'next node pointer' of a node * @param ll_p pointer to linked list * @param act pointer to a node which next node pointer should be set *

* Set the 'pervious node pointer' of a node * @param ll_p pointer to linked list * @param act pointer to a node which prev. node pointer should be s