Guillermo Stedile
Forked para SNOCC
RA8875.h
- Committer:
- WiredHome
- Date:
- 2016-02-27
- Revision:
- 106:c80828f5dea4
- Parent:
- 105:4f116006ba1f
- Child:
- 107:f9ccffcb84f1
File content as of revision 106:c80828f5dea4:
///
/// @mainpage RA8875 Display Controller Driver library
///
/// The RA8875 Display controller is a powerful interface for low cost displays. It
/// can support displays up to 800 x 600 pixels x 16-bit color. Another common
/// implementation is 480 x 272 x 16 with two layers. The two layers can be
/// exchanged, or blended in various ways (transparency, OR, AND, and more).
/// It includes graphics acceleration capabilities for drawing primitives,
/// such as line, rectangle, circles, and more.
///
/// It is not a display for super-fast animations, video, picture frames and so forth,
/// at least when using the SPI ports. Performance has not been evaluated with one
/// of the parallel port options.
///
/// The controller additionally supports backlight control (via PWM), keypad scanning
/// (for a 4 x 5 matrix) and resistive touch-panel support. Others have provides
/// support for a capacitive touch screen.
///
/// @section Display_Config Display Configuration
///
/// This section details basics for bringing the display online. At a minimum,
/// the display is instantiated. After that any of the available commands
/// may be issued.
///
/// During the instantiation, the display is powered on, cleared, and the backlight
/// is energized. Additionally, the keypad and touchscreen features are activated.
/// It is important to keep in mind that the keypad had the default mapping, and
/// the touchscreen does not have the calibration matrix configured, so additional
/// steps may be necessary.
///
/// @code
/// RA8875 lcd(p5, p6, p7, p12, NC, "tft");
/// lcd.init();
/// lcd.foreground(Blue);
/// lcd.line(0,0, 479,271);
/// ...
/// @endcode
///
/// @section Touch_Panel Touch Panel
///
/// The supported touch panel interface is for a resistive panel, and is natively
/// supported by the RA8875 controller. There are a few steps to enable this interface.
///
/// @subsection Touch_Panel_Enable Touch Panel Enable
///
/// See @ref TouchPanelInit has two forms - fully automatic, and controlled. See the APIs for
/// details.
///
/// @subsection Touch_Panel_Calibration
///
/// The touch panel is not initially calibrated on startup. The application should
/// provide a means to activate the calibration process, and that should not require
/// the touchscreen as it may not yet be usable. Alternately, a calibration matrix
/// can be loaded from non-volatile and installed.
///
/// @section Keypad Keypad
///
/// The keypad has a default keypad mapping, but there is an API that permits
/// installing a custom keymap.
///
/// @todo Add APIs for the 2nd PWM channel, which might be quite useful as a simple
/// beeper.
/// @todo Figure out how to "init()" in the constructor. I ran into some issues if
/// the display was instantiated before main(), and the code would not run,
/// thus the exposure and activation of the init() function. If the constructor
/// was within main(), then it seemed to work as expected.
///
#ifndef RA8875_H
#define RA8875_H
#include <mbed.h>
#include "RA8875_Regs.h"
#include "GraphicsDisplay.h"
#define RA8875_DEFAULT_SPI_FREQ 5000000
// Define this to enable code that monitors the performance of various
// graphics commands.
//#define PERF_METRICS
// What better place for some test code than in here and the companion
// .cpp file. See also the bottom of this file.
//#define TESTENABLE
/// DOS colors - slightly color enhanced
#define Black (color_t)(RGB(0,0,0))
#define Blue (color_t)(RGB(0,0,187))
#define Green (color_t)(RGB(0,187,0))
#define Cyan (color_t)(RGB(0,187,187))
#define Red (color_t)(RGB(187,0,0))
#define Magenta (color_t)(RGB(187,0,187))
#define Brown (color_t)(RGB(63,63,0))
#define Gray (color_t)(RGB(187,187,187))
#define Charcoal (color_t)(RGB(85,85,85))
#define BrightBlue (color_t)(RGB(0,0,255))
#define BrightGreen (color_t)(RGB(0,255,0))
#define BrightCyan (color_t)(RGB(0,255,255))
#define BrightRed (color_t)(RGB(255,0,0))
#define Orange (color_t)(RGB(255,85,85))
#define Pink (color_t)(RGB(255,85,255))
#define Yellow (color_t)(RGB(187,187,0))
#define White (color_t)(RGB(255,255,255))
#define DarkBlue (color_t)(RGB(0,0,63))
#define DarkGreen (color_t)(RGB(0,63,0))
#define DarkCyan (color_t)(RGB(0,63,63))
#define DarkRed (color_t)(RGB(63,0,0))
#define DarkMagenta (color_t)(RGB(63,0,63))
#define DarkBrown (color_t)(RGB(63,63,0))
#define DarkGray (color_t)(RGB(63,63,63))
#define min(a,b) ((a<b)?a:b)
#define max(a,b) ((a>b)?a:b)
//namespace SW_graphics
//{
class FPointerDummy; // used by the callback methods.
/// This is a graphics library for the Raio RA8875 Display Controller chip
/// attached to a 4-wire SPI interface.
///
/// It offers both primitive and high level APIs.
///
/// Central to this API is a coordinate system, where the origin (0,0) is in
/// the top-left corner of the display, and the width (x) extends positive to the
/// right and the height (y) extends positive toward the bottom.
///
/// @caution As there are both graphics and text commands, one must take care to use
/// the proper coordinate system for each. Some of the text APIs are in units
/// of column and row, which is measured in character positions (and dependent
/// on the font size), where other text APIs permit pixel level positioning.
///
/// @code
/// #include "RA8875.h"
/// RA8875 lcd(p5, p6, p7, p12, NC, "tft");
///
/// int main()
/// {
/// lcd.init();
/// lcd.printf("printing 3 x 2 = %d", 3*2);
/// lcd.circle( 400,25, 25, BrightRed);
/// lcd.fillcircle( 400,25, 15, RGB(128,255,128));
/// lcd.ellipse( 440,75, 35,20, BrightBlue);
/// lcd.fillellipse( 440,75, 25,10, Blue);
/// lcd.triangle( 440,100, 475,110, 450,125, Magenta);
/// lcd.filltriangle( 445,105, 467,111, 452,120, Cyan);
/// lcd.rect( 400,130, 475,155, Brown);
/// lcd.fillrect( 405,135, 470,150, Pink);
/// lcd.roundrect( 410,160, 475,190, 10,8, Yellow);
/// lcd.fillroundrect(415,165, 470,185, 5,3, Orange);
/// lcd.line( 430,200, 460,230, RGB(0,255,0));
/// for (int i=0; i<=30; i+=5)
/// lcd.pixel(435+i,200+i, White);
/// }
/// @endcode
///
/// @todo Add Scroll support for text.
/// @todo Improve sync between internal and external font support - cursor, window, scroll.
/// @todo Add Hardware reset signal - but testing to date indicates it is not needed.
/// @todo Add high level objects - x-y graph, meter, others... but these will
/// probably be best served in another class, since they may not
/// be needed for many uses.
///
class RA8875 : public GraphicsDisplay
{
public:
/// cursor type to be shown as the text cursor.
typedef enum
{
NOCURSOR, ///< cursor is hidden
IBEAM, ///< | cursor
UNDER, ///< _ cursor
BLOCK ///< Block cursor
} cursor_t;
/// font type selection.
typedef enum
{
ISO8859_1, ///< ISO8859-1 font
ISO8859_2, ///< ISO8859-2 font
ISO8859_3, ///< ISO8859-3 font
ISO8859_4 ///< ISO8859-4 font
} font_t;
/// display orientation
typedef enum
{
normal, ///< normal (landscape) orientation
rotate_0 = normal, ///< alternate to 'normal'
rotate_90, ///< rotated clockwise 90 degree
rotate_180, ///< rotated (clockwise) 180 degree
rotate_270, ///< rotated clockwise 270 degree
} orientation_t;
/// alignment
typedef enum
{
align_none, ///< align - none
align_full ///< align - full
} alignment_t;
/// Scale factor - 1, 2, 3 4
typedef int HorizontalScale;
/// Scale factor - 1, 2, 3, 4
typedef int VerticalScale;
/// Clear screen region
typedef enum
{
FULLWINDOW, ///< Full screen
ACTIVEWINDOW ///< active window/region
} Region_t;
/// Set the Layer Display Mode. @ref SetLayerMode
typedef enum
{
ShowLayer0, ///< Only layer 0 is visible, layer 1 is hidden (default)
ShowLayer1, ///< Only layer 1 is visible, layer 0 is hidden
LightenOverlay, ///< Lighten-overlay mode
TransparentMode, ///< Transparent mode
BooleanOR, ///< Boolean OR mode
BooleanAND, ///< Boolean AND mode
FloatingWindow ///< Floating Window mode
} LayerMode_T;
/// Touch Panel modes
typedef enum
{
TP_Auto, ///< Auto touch detection mode
TP_Manual, ///< Manual touch detection mode
} tpmode_t;
/// printscreen callback commands
typedef enum
{
OPEN, ///< command to open the file. cast uint32_t * to the buffer to get the total size to be written.
WRITE, ///< command to write some data, buffer points to the data and the size is in bytes.
CLOSE, ///< command to close the file
} filecmd_t;
/// print screen callback
///
/// The special form of the print screen will pass one blob at a time
/// to the callback. There are basic command declaring that the stream
/// can be opened, a block written, and the stream closed. There is
/// also a command to communicate the total size being delivered.
///
/// @code
/// lcd.PrintScreen(x,y,w,h,callback);
/// ...
/// void callback(filecmd_t cmd, uint8_t * buffer, uint16_t size) {
/// switch(cmd) {
/// case OPEN:
/// pc.printf("About to write %u bytes\r\n", *(uint32_t *)buffer);
/// fh = fopen("file.bmp", "w+b");
/// break;
/// case WRITE:
/// fwrite(buffer, size, fh);
/// break;
/// case CLOSE:
/// fclose(fh);
/// break;
/// default:
/// pc.printf("Unexpected callback %d\r\n", cmd);
/// break;
/// }
/// }
/// @endcode
///
/// @param cmd is the command to execute. See @ref filecmd_t.
/// @param buffer is a pointer to the buffer being passed.
/// @param size is the number of bytes in the buffer.
///
typedef RetCode_t (* PrintCallback_T)(filecmd_t cmd, uint8_t * buffer, uint16_t size);
/// Constructor for a display based on the RAiO RA8875
/// display controller.
///
/// This configures the registers and calls the @ref init method.
///
/// @code
/// #include "RA8875.h"
/// RA8875 lcd(p5, p6, p7, p12, NC, "tft");
///
/// int main()
/// {
/// lcd.init();
/// lcd.printf("printing 3 x 2 = %d", 3*2);
/// lcd.circle(400,25, 25, BrightRed);
/// }
/// @endcode
///
/// @param[in] mosi is the SPI master out slave in pin on the mbed.
/// @param[in] miso is the SPI master in slave out pin on the mbed.
/// @param[in] sclk is the SPI shift clock pin on the mbed.
/// @param[in] csel is the DigitalOut pin on the mbed to use as the
/// active low chip select for the display controller.
/// @param[in] reset is the DigitalOut pin on the mbed to use as the
/// active low reset input on the display controller -
/// but this is not currently used.
/// @param[in] name is a text name for this object, which will permit
/// capturing stdout to puts() and printf() directly to it.
///
RA8875(PinName mosi, PinName miso, PinName sclk, PinName csel, PinName reset, const char * name = "lcd");
// Destructor doesn't have much to do as this would typically be created
// at startup, and not at runtime.
//~RA8875();
/// Initialize the driver.
///
/// The RA8875 can scale to 800x600, and it supports 8 or 16-bit color. It also supports
/// layers, but it cannot support layers at the maximum color and screen size. When configured
/// under 800x600, it will support both 16-bit and 2 layers. But at 800x600, it can
/// support either 16-bit color, or 2 layers, but not both.
///
/// @param[in] width in pixels to configure the display for. This parameter is optional
/// and the default is 480.
/// @param[in] height in pixels to configure the display for. This parameter is optional
/// and the default is 272.
/// @param[in] color_bpp can be either 8 or 16, but must be consistent
/// with the width and height parameters. This parameter is optional
/// and the default is 16.
/// @param[in] power defines if the display should be left in the power-on or off state.
/// If power is true (on), the backlight is set to 100%. This parameter is optional
/// and the default is true (on). See @ref Power.
/// @param[in] keypadon defines if the keypad support should be enabled. This parameter is optional
/// and the default is true (enabled). See @ref KeypadInit.
/// @param[in] touchscreeenon defines if the keypad support should be enabled. This parameter is optional
/// and the default is true (enabled). See @ref TouchPanelInit.
/// @returns success/failure code. See @ref RetCode_t.
///
RetCode_t init(int width = 480, int height = 272, int color_bpp = 16,
bool poweron = true, bool keypadon = true, bool touchscreeenon = true);
/// Get a pointer to the error code.
///
/// This method returns a pointer to a text string that matches the
/// code. See @ref RetCode_t.
///
/// @param[in] code is the return value from RetCode_t to look up.
/// @returns a pointer to the text message representing code. If code
/// is not a valid value, then it returns the text for bad_parameter;
const char * GetErrorMessage(RetCode_t code);
/// Select the drawing layer for subsequent commands.
///
/// If the screen configuration is 480 x 272, or if it is 800 x 480
/// and 8-bit color, the the display supports two layers, which can
/// be independently drawn on and shown. Additionally, complex
/// operations involving both layers are permitted.
///
/// @code
/// //lcd.SetLayerMode(OnlyLayer0); // default is layer 0
/// lcd.rect(400,130, 475,155,Brown);
/// lcd.SelectDrawingLayer(1);
/// lcd.circle(400,25, 25, BrightRed);
/// wait(1);
/// lcd.SetLayerMode(ShowLayer1);
/// @endcode
///
/// @attention The user manual refers to Layer 1 and Layer 2, however the
/// actual register values are value 0 and 1. This API as well as
/// others that reference the layers use the values 0 and 1 for
/// cleaner iteration in the code.
///
/// @param[in] layer is 0 or 1 to select the layer for subsequent
/// commands.
/// @returns success/failure code. See @ref RetCode_t.
///
RetCode_t SelectDrawingLayer(uint16_t layer);
/// Get the currently active drawing layer.
///
/// This returns a value, 0 or 1, based on the screen configuration
/// and the currently active drawing layer.
///
/// @code
/// uint16_t prevLayer = lcd.GetDrawingLayer();
/// lcd.SelectDrawingLayer(x);
/// lcd.circle(400,25, 25, BrightRed);
/// lcd.SelectDrawingLayer(prevLayer);
/// @endcode
///
/// @attention The user manual refers to Layer 1 and Layer 2, however the
/// actual register values are value 0 and 1. This API as well as
/// others that reference the layers use the values 0 and 1 for
/// cleaner iteration in the code.
///
/// @returns the current drawing layer; 0 or 1.
///
uint16_t GetDrawingLayer(void);
/// Set the Layer presentation mode.
///
/// This sets the presentation mode for layers, and permits showing
/// a single layer, or applying a mode where the two layers
/// are combined using one of the hardware methods.
///
/// Refer to the RA8875 data sheet for full details.
///
/// @code
/// //lcd.SetLayerMode(OnlyLayer0); // default is layer 0
/// lcd.rect(400,130, 475,155,Brown);
/// lcd.SelectDrawingLayer(1);
/// lcd.circle(400,25, 25, BrightRed);
/// wait(1);
/// lcd.SetLayerMode(ShowLayer1);
/// @endcode
///
/// @param[in] mode sets the mode in the Layer Transparency Register.
/// @returns success/failure code. See @ref RetCode_t.
///
RetCode_t SetLayerMode(LayerMode_T mode);
/// Get the Layer presentation mode.
///
/// This gets the current layer mode. See @ref LayerMode_T.
///
/// @returns layer mode.
///
LayerMode_T GetLayerMode(void);
/// Set the layer transparency for each layer.
///
/// Set the transparency, where the range of values is
/// from zero (fully visible) to eight (fully transparent).
/// The input value is automatically limited to this range.
///
/// @code
/// // draw something on each layer, then step-fade across
/// display.SetLayerMode(RA8875::TransparentMode);
/// for (i=0; i<=8; i++) {
/// display.SetLayerTransparency(i, 8-i);
/// wait_ms(200);
/// }
/// @endcode
///
/// @param[in] layer1 sets the layer 1 transparency.
/// @param[in] layer2 sets the layer 2 transparency.
/// @returns success/failure code. See @ref RetCode_t.
///
RetCode_t SetLayerTransparency(uint8_t layer1, uint8_t layer2);
/// Set the background color register used for transparency.
///
/// This command sets the background color registers that are used
/// in the transparent color operations involving the layers.
///
/// @param[in] color is optional and expressed in 16-bit format. If not
/// supplied, a default of Black is used.
/// @returns success/failure code. See @ref RetCode_t.
///
RetCode_t SetBackgroundTransparencyColor(color_t color = RGB(0,0,0));
/// Get the background color value used for transparency.
///
/// This command reads the background color registers that define
/// the transparency color for operations involving layers.
///
/// @returns the color.
///
color_t GetBackgroundTransparencyColor(void);
/// Initialize theTouch Panel controller with default values
///
/// This activates the simplified touch panel init, which may work for
/// most uses. The alternate API is available if fine-grained control
/// is needed for the numerous settings.
///
/// @returns success/failure code. See @ref RetCode_t.
///
RetCode_t TouchPanelInit(void);
/// Initialize the Touch Panel controller with detailed settings.
///
/// This is the detailed touch panel init, which provides the ability
/// to set nearly every possible option.
///
/// @param[in] bTpEnable Touch Panel enable/disable control:
/// - TP_ENABLE: enable the touch panel
/// - TP_DISABLE: disable the touch panel
/// @param[in] bTpAutoManual Touch Panel operating mode:
/// - TP_MODE_AUTO: automatic capture
/// - TP_MODE_MANUAL: manual capture
/// @param[in] bTpDebounce Debounce circuit enable for touch panel interrupt:
/// - TP_DEBOUNCE_OFF: disable the debounce circuit
/// - TP_DEBOUNCE_ON: enable the debounce circuit
/// @param[in] bTpManualMode When Manual Mode is selected, this sets the mode:
/// - TP_MANUAL_IDLE: touch panel is idle
/// - TP_MANUAL_WAIT: wait for touch panel event
/// - TP_MANUAL_LATCH_X: latch X data
/// - TP_MANUAL_LATCH_Y: latch Y data
/// @param[in] bTpAdcClkDiv Sets the ADC clock as a fraction of the System CLK:
/// - TP_ADC_CLKDIV_1: Use CLK
/// - TP_ADC_CLKDIV_2: Use CLK/2
/// - TP_ADC_CLKDIV_4: Use CLK/4
/// - TP_ADC_CLKDIV_8: Use CLK/8
/// - TP_ADC_CLKDIV_16: Use CLK/16
/// - TP_ADC_CLKDIV_32: Use CLK/32
/// - TP_ADC_CLKDIV_64: Use CLK/64
/// - TP_ADC_CLKDIV_128: Use CLK/128
/// @param[in] bTpAdcSampleTime Touch Panel sample time delay before ADC data is ready:
/// - TP_ADC_SAMPLE_512_CLKS: Wait 512 system clocks
/// - TP_ADC_SAMPLE_1024_CLKS: Wait 1024 system clocks
/// - TP_ADC_SAMPLE_2048_CLKS: Wait 2048 system clocks
/// - TP_ADC_SAMPLE_4096_CLKS: Wait 4096 system clocks
/// - TP_ADC_SAMPLE_8192_CLKS: Wait 8192 system clocks
/// - TP_ADC_SAMPLE_16384_CLKS: Wait 16384 system clocks
/// - TP_ADC_SAMPLE_32768_CLKS: Wait 32768 system clocks
/// - TP_ADC_SAMPLE_65536_CLKS: Wait 65536 system clocks
/// @returns success/failure code. See @ref RetCode_t.
///
RetCode_t TouchPanelInit(uint8_t bTpEnable, uint8_t bTpAutoManual, uint8_t bTpDebounce,
uint8_t bTpManualMode, uint8_t bTpAdcClkDiv, uint8_t bTpAdcSampleTime);
/// Poll the TouchPanel and on a touch event return the a to d filtered x, y coordinates.
///
/// This method reads the touch controller, which has a 10-bit range for each the
/// x and the y axis.
///
/// @note The returned values are not in display (pixel) units but are in analog to
/// digital converter units.
///
/// @note This API is usually not needed. See @ref TouchPanelComputeCalibration.
/// See @ref TouchPanelReadable.
///
/// @param[out] x is the x scale a/d value.
/// @param[out] y is the y scale a/d value.
/// @returns a value indicating the state of the touch,
/// - no_cal: no calibration matrix is available, touch coordinates are not returned.
/// - no_touch: no touch is detected, touch coordinates are not returned.
/// - touch: touch is detected, touch coordinates are returned.
/// - held: held after touch, touch coordinates are returned.
/// - release: indicates a release, touch coordinates are returned.
///
TouchCode_t TouchPanelA2DFiltered(int *x, int *y);
/// Poll the TouchPanel and on a touch event return the a to d raw x, y coordinates.
///
/// This method reads the touch controller, which has a 10-bit range for each the
/// x and the y axis. A number of samples of the raw data are taken, filtered,
/// and the results are returned.
///
/// @note The returned values are not in display (pixel) units but are in analog to
/// digital converter units.
///
/// @note This API is usually not needed. See @ref TouchPanelComputeCalibration.
/// See @ref TouchPanelReadable.
///
/// @param[out] x is the x scale a/d value.
/// @param[out] y is the y scale a/d value.
/// @returns a value indicating the state of the touch,
/// - no_cal: no calibration matrix is available, touch coordinates are not returned.
/// - no_touch: no touch is detected, touch coordinates are not returned.
/// - touch: touch is detected, touch coordinates are returned.
/// - held: held after touch, touch coordinates are returned.
/// - release: indicates a release, touch coordinates are returned.
///
TouchCode_t TouchPanelA2DRaw(int *x, int *y);
/// Get the screen calibrated point of touch.
///
/// This method determines if there is a touch and if so it will provide
/// the screen-relative touch coordinates. This method can be used in
/// a manner similar to Serial.readable(), to determine if there was a
/// touch and indicate that - but not care about the coordinates. Alternately,
/// if a valid pointer to a point_t is provided, then if a touch is detected
/// the point_t will be populated with data.
///
/// @code
/// Timer t;
/// t.start();
/// do {
/// point_t point = {0, 0};
/// if (display.TouchPanelReadable(&point)) {
/// display.pixel(point, Red);
/// }
/// } while (t.read_ms() < 30000);
/// @endcode
///
/// @param[in, out] TouchPoint is a pointer to a point_t, which is set as the touch point, if a touch is registered.
/// @returns a value indicating the state of the touch,
/// - no_cal: no calibration matrix is available, touch coordinates are not returned.
/// - no_touch: no touch is detected, touch coordinates are not returned.
/// - touch: touch is detected, touch coordinates are returned.
/// - held: held after touch, touch coordinates are returned.
/// - release: indicates a release, touch coordinates are returned.
///
TouchCode_t TouchPanelReadable(point_t * TouchPoint = NULL);
/// Wait for a touch panel touch and return it.
///
/// This method is similar to Serial.getc() in that it will wait for a touch
/// and then return. In order to extract the coordinates of the touch, a
/// valid pointer to a point_t must be provided.
///
/// @note There is no timeout on this function, so its use is not recommended.
///
/// @code
/// Timer t;
/// t.start();
/// do {
/// point_t point = {0, 0};
/// display.TouchPanelGet(&point); // hangs here until touch
/// display.pixel(point, Red);
/// } while (t.read_ms() < 30000);
/// @endcode
///
/// @param[out] TouchPoint is the touch point, if a touch is registered.
/// @returns a value indicating the state of the touch,
/// - no_cal: no calibration matrix is available, touch coordinates are not returned.
/// - no_touch: no touch is detected, touch coordinates are not returned.
/// - touch: touch is detected, touch coordinates are returned.
/// - held: held after touch, touch coordinates are returned.
/// - release: indicates a release, touch coordinates are returned.
///
TouchCode_t TouchPanelGet(point_t * TouchPoint);
/// Calibrate the touch panel.
///
/// This method accepts two lists - one list is target points in ,
/// display coordinates and the other is a lit of raw touch coordinate
/// values. It generates a calibration matrix for later use. This
/// matrix is also accessible to the calling API, which may store
/// the matrix in persistent memory and then install the calibration
/// matrix on the next power cycle. By doing so, it can avoid the
/// need to calibrate on every power cycle.
///
/// @note The methods "TouchPanelComputeCalibration", "TouchPanelReadable", and
/// indirectly the "TouchPanelSetMatrix" methods are all derived
/// from a program by Carlos E. Vidales. See the copyright note
/// for further details. See also the article
/// http://www.embedded.com/design/system-integration/4023968/How-To-Calibrate-Touch-Screens
///
/// @copyright Copyright (c) 2001, Carlos E. Vidales. All rights reserved.
/// This sample program was written and put in the public domain
/// by Carlos E. Vidales. The program is provided "as is"
/// without warranty of any kind, either expressed or implied.
/// If you choose to use the program within your own products
/// you do so at your own risk, and assume the responsibility
/// for servicing, repairing or correcting the program should
/// it prove defective in any manner.
/// You may copy and distribute the program's source code in any
/// medium, provided that you also include in each copy an
/// appropriate copyright notice and disclaimer of warranty.
/// You may also modify this program and distribute copies of
/// it provided that you include prominent notices stating
/// that you changed the file(s) and the date of any change,
/// and that you do not charge any royalties or licenses for
/// its use.
///
/// @param[in] display is a pointer to a set of 3 points, which
/// are in display units of measure. These are the targets
/// the calibration was aiming for.
/// @param[in] screen is a pointer to a set of 3 points, which
/// are in touchscreen units of measure. These are the
/// registered touches.
/// @param[out] matrix is an optional parameter to hold the calibration matrix
/// as a result of the calibration. This can be saved in
/// non-volatile memory to recover the calibration after a power fail.
/// @returns success/failure code. See @ref RetCode_t.
///
RetCode_t TouchPanelComputeCalibration(point_t display[3], point_t screen[3], tpMatrix_t * matrix);
/// Perform the touch panel calibration process.
///
/// This method provides the easy "shortcut" to calibrating the touch panel.
/// The process will automatically generate the calibration points, present
/// the targets on-screen, detect the touches, compute the calibration
/// matrix, and optionally provide the calibration matrix to the calling code
/// for persistence in non-volatile memory.
///
/// @param[out] matrix is an optional parameter to hold the calibration matrix
/// as a result of the calibration. This can be saved in
/// non-volatile memory to recover the calibration after a power fail.
/// @returns success/failure code. See @ref RetCode_t.
///
RetCode_t TouchPanelCalibrate(tpMatrix_t * matrix = NULL);
/// Perform the touch panel calibration process.
///
/// This method provides the easy "shortcut" to calibrating the touch panel.
/// The process will automatically generate the calibration points, present
/// the targets on-screen, detect the touches, compute the calibration
/// matrix, and optionally provide the calibration matrix to the calling code
/// for persistence in non-volatile memory.
///
/// @param[in] msg is a text message to present on the screen during the
/// calibration process.
/// @param[out] matrix is an optional parameter to hold the calibration matrix
/// as a result of the calibration. This can be saved in
/// non-volatile memory to recover the calibration after a power fail.
/// @param[in] maxwait_s is the maximum number of seconds to wait for a touch
/// calibration. If no touch panel installed, it then reports
/// touch_cal_timeout.
/// @returns success/failure code. See @ref RetCode_t.
///
RetCode_t TouchPanelCalibrate(const char * msg, tpMatrix_t * matrix = NULL, int maxwait_s = 15);
/// Set the calibration matrix for the touch panel.
///
/// This method is used to set the calibration matrix for the touch panel. After
/// performing the calibration (See @ref TouchPanelComputeCalibration), the matrix can be stored.
/// On a subsequence power cycle, the matrix may be restored from non-volatile and
/// passed in to this method. It will then be held to perform the corrections when
/// reading the touch panel point.
///
/// @code
/// FILE * fh = fopen("/local/tpmatrix.cfg", "r");
/// if (fh) {
/// tpMatrix_t matrix;
/// if (fread(fh, &matrix, sizeof(tpMatrix_t))) {
/// lcd.TouchPanelSetMatrix(&matrix);
/// }
/// fclose(fh);
/// }
/// @endcode
///
/// @param[in] matrix is a pointer to the touch panel calibration matrix.
/// @returns success/failure code. See @ref RetCode_t.
///
RetCode_t TouchPanelSetMatrix(tpMatrix_t * matrix);
#if 0
/// Append interrupt handler for specific RA8875 interrupt source
///
/// @param[in] bISRType Interrupt Source, should be:
/// - RA8875_INT_KEYSCAN: KEYCAN interrupt
/// - RA8875_INT_DMA: DMA interrupt
/// - RA8875_INT_TP: Touch panel interrupt
/// - RA8875_INT_BTE: BTE process complete interrupt
/// - RA8875_INT_BTEMCU_FONTWR: Multi-purpose interrupt (see spec sheet)
/// @param[in] fptr is a callback function to handle the interrupt event.
/// @returns none
///
void AppendISR(uint8_t bISRType, void(*fptr)(void));
/// Unappend interrupt handler for specific RA8875 interrupt source
///
/// @param[in] bISRType Interrupt Source, should be:
/// - RA8875_INT_KEYSCAN: KEYCAN interrupt
/// - RA8875_INT_DMA: DMA interrupt
/// - RA8875_INT_TP: Touch panel interrupt
/// - RA8875_INT_BTE: BTE process complete interrupt
/// - RA8875_INT_BTEMCU_FONTWR: Multi-purpose interrupt (see spec sheet)
/// @return none
///
void UnAppendISR(uint8_t bISRType);
#endif
/// Initialize the keypad interface on the RA8875 controller.
///
/// Enables the keypad subsystem. It will scan the 4 x 5 matrix
/// and make available key presses.
///
/// @note See section 5-13 of RAIO RA8875 data sheet for more details.
/// @caution When using the display from buy-display.com, be sure that
/// the option for the keypad is configured on the hardware.
///
/// All parameters are optional.
/// @param[in] scanEnable when true, enables the key scan function (default: true).
/// @param[in] longDetect when true, additionally enables the long key held detection (default: false).
/// @param[in] sampleTime setting (range: 0 - 3, default: 0).
/// @param[in] scanFrequency setting (range: 0 - 7, default: 0).
/// @param[in] longTimeAdjustment (range: 0 - 3, default: 0).
/// @param[in] interruptEnable when true, enables interrupts from keypress (default: false).
/// @param[in] wakeupEnable when true, activates the wakeup function (default: false).
///
/// @returns success/failure code. See @ref RetCode_t.
///
RetCode_t KeypadInit(bool scanEnable = true, bool longDetect = false,
uint8_t sampleTime = 0, uint8_t scanFrequency = 0,
uint8_t longTimeAdjustment = 0,
bool interruptEnable = false, bool wakeupEnable = false);
/// Create Key Code definitions for the key matrix.
///
/// This API provides a table of 22 key-code assignments for the matrix of keys.
/// This can be used to translate the keys 1 - 20 into some other value, as
/// well as to communicate the "no key" (zero) and "error state" (21).
///
/// In this way, a keypad could easily emulate a piece of a keyboard, transforming
/// 0 - 20 into the values 0, '0', '1', '2', '3', '4', '5', '6', '7', '8',
/// '9', '+', '-', '*' , '/', '=', '<bs>', '<cr>', and so on...
///
/// @code
/// // Return Value by Row, Column Example reassignment
/// // Column 0 1 2 3 4
/// // +-------------------------+ +-------------------------+
/// // Row 0 | 1 2 3 4 5 | | '7' '8' '9' ',' '<-' |
/// // 1 | 6 7 8 9 10 | | '4' '5' '6' '/' '-' |
/// // 2 | 11 12 13 14 15 | | '1' '2' '3' '*' '+' |
/// // 3 | 16 17 18 19 20 | | '0' '.' '(' ')' '\n' |
/// // +-------------------------+ +-------------------------+
/// // Return value 0 = No Key pressed
/// // Return value 21 = Error
/// const uint8_t CodeList[22] =
/// {0, '7', '8', '9', ',', '\h',
/// '4', '5', '6', '/', '-',
/// '1', '2', '3', '*', '+',
/// '0', '.', '(', ')', '\n',
/// '\x1b'};
/// lcd.SetKeyMap(CodeList);
/// @endcode
///
/// @param[in] CodeList is a pointer to an always available byte-array
/// where the first 22 bytes are used as the transformation
/// from raw code to your reassigned value.
/// If CodeList is NULL, the original raw value key map is
/// restored.
/// @returns noerror.
///
RetCode_t SetKeyMap(const uint8_t * CodeList = NULL);
/// Determine if a key has been hit
///
/// @returns true if a key has been hit
///
bool readable();
/// Blocking read of the keypad.
///
/// @caution: This is a blocking read, so it is important to first call _kbhit()
/// to avoid hanging your processes.
///
/// A keypad connected to the RA8875 is connected in a matrix of 4 rows and 5 columns.
/// When pressed, this method will return a code in the range of 1 through 20, reserving
/// the value 0 to indicate that no key is pressed.
///
/// Additionally, if configured to detect a "long press", bit 7 will be set to indicate
/// this. In this situation, first a "normal press" would be detected and signaled and
/// soon after that a "long press" of the same key would be detected and communicated.
///
/// @return 8-bit where bit 7 indicates a long press. The remaining bits indicate the
/// keypress using 0 = no key pressed, 1 - 20 = the key pressed.
///
uint8_t getc();
/// Determine if a point is within a rectangle.
///
/// @param[in] rect is a rectangular region to use.
/// @param[in] p is a point to analyze to see if it is within the rect.
/// @returns true if p is within rect.
///
bool Intersect(rect_t rect, point_t p);
/// Write a command to the display with a word of data.
///
/// This is a high level command, and may invoke several primitives.
///
/// @param[in] command is the command to write.
/// @param[in] data is data to be written to the command register.
/// @returns success/failure code. See @ref RetCode_t.
///
RetCode_t WriteCommandW(uint8_t command, uint16_t data);
/// Write a command to the display
///
/// This is a high level command, and may invoke several primitives.
///
/// @param[in] command is the command to write.
/// @param[in] data is optional data to be written to the command register
/// and only occurs if the data is in the range [0 - 0xFF].
/// @returns success/failure code. See @ref RetCode_t.
///
virtual RetCode_t WriteCommand(unsigned char command, unsigned int data = 0xFFFF);
/// Write a data word to the display
///
/// This is a high level command, and may invoke several primitives.
///
/// @param[in] data is the data to write.
/// @returns success/failure code. See @ref RetCode_t.
///
RetCode_t WriteDataW(uint16_t data);
/// Write a data byte to the display
///
/// This is a high level command, and may invoke several primitives.
///
/// @param[in] data is the data to write.
/// @returns success/failure code. See @ref RetCode_t.
///
virtual RetCode_t WriteData(unsigned char data);
/// Read a command register
///
/// @param[in] command is the command register to read.
/// @returns the value read from the register.
///
unsigned char ReadCommand(unsigned char command);
/// Read a data byte from the display
///
/// This is a high level command, and may invoke several primitives.
///
/// @returns data that was read.
///
unsigned char ReadData(void);
/// Read a word from the display
///
/// This is a high level command, and may invoke several primitives.
///
/// @returns data that was read.
///
uint16_t ReadDataW(void);
/// Read the display status
///
/// This is a high level command, and may invoke several primitives.
///
/// @returns data that was read.
///
unsigned char ReadStatus(void);
/// get the width in pixels of the currently active font
///
/// @returns font width in pixels.
///
dim_t fontwidth(void);
/// get the height in pixels of the currently active font
///
/// @returns font height in pixels.
///
dim_t fontheight(void);
/// get the number of colums based on the currently active font
///
/// @returns number of columns.
///
virtual int columns(void);
/// get the number of rows based on the currently active font
///
/// @returns number of rows.
///
virtual int rows(void);
/// get the screen width in pixels
///
/// @returns screen width in pixels.
///
virtual dim_t width(void);
/// get the screen height in pixels
///
/// @returns screen height in pixels.
///
virtual dim_t height(void);
/// get the color depth in bits per pixel.
///
/// @returns 8 or 16 only.
///
virtual dim_t color_bpp(void);
/// Set cursor position based on the current font size.
///
/// @param[in] column is the horizontal position in character positions
/// @param[in] row is the vertical position in character positions
/// @returns success/failure code. See @ref RetCode_t.
///
virtual RetCode_t locate(textloc_t column, textloc_t row);
/// Prepare the controller to write text to the screen by positioning
/// the cursor.
///
/// @code
/// lcd.SetTextCursor(100, 25);
/// lcd.puts("Hello");
/// @endcode
///
/// @param[in] x is the horizontal position in pixels (from the left edge)
/// @param[in] y is the vertical position in pixels (from the top edge)
/// @returns success/failure code. See @ref RetCode_t.
///
RetCode_t SetTextCursor(loc_t x, loc_t y);
/// Prepare the controller to write text to the screen by positioning
/// the cursor.
///
/// @code
/// point_t point = {100, 25};
/// lcd.SetTextCursor(point);
/// lcd.puts("Hello");
/// @endcode
///
/// @param[in] p is the x:y point in pixels from the top-left.
/// @returns success/failure code. See @ref RetCode_t.
///
RetCode_t SetTextCursor(point_t p);
/// Get the current cursor position in pixels.
///
/// @code
/// point_t point = GetTextCursor();
/// if (point.x > 100 && point.y > 150)
/// //...
/// @endcode
///
/// @returns cursor position.
///
point_t GetTextCursor(void);
/// Get the current cursor horizontal position in pixels.
///
/// @returns cursor position horizontal offset.
///
loc_t GetTextCursor_X(void);
/// Get the current cursor vertical position in pixels.
///
/// @returns cursor position vertical offset.
///
loc_t GetTextCursor_Y(void);
/// Configure additional Cursor Control settings.
///
/// This API lets you modify other cursor control settings;
/// Cursor visible/hidden, Cursor blink/normal,
/// Cursor I-Beam/underscore/box.
///
/// @param[in] cursor can be set to NOCURSOR (default), IBEAM,
/// UNDER, or BLOCK.
/// @param[in] blink can be set to true or false (default false)
/// @returns success/failure code. See @ref RetCode_t
///
RetCode_t SetTextCursorControl(cursor_t cursor = NOCURSOR, bool blink = false);
/// Select the built-in ISO 8859-X font to use next.
///
/// Supported fonts: ISO 8859-1, -2, -3, -4
///
/// @caution This only modifies the choice of font from the RA8875 internal
/// fonts.
///
/// @param[in] font selects the font for the subsequent text rendering.
///
/// @note if either hScale or vScale is outside of its permitted range,
/// the command is not executed.
/// @returns success/failure code. See @ref RetCode_t.
///
RetCode_t SetTextFont(font_t font = ISO8859_1);
/// Sets the display orientation.
///
/// @note This command does not let you "merge" text onto an existing
/// image, since it reuses the memory for the new orientation.
/// Therefore, it is recommended that you issue a cls() prior
/// to sending text to the screen, or you end with a blended
/// image that is probably not as intended.
///
/// @caution This command only operates on the RA8875 internal fonts.
///
/// @code
/// lcd.cls();
/// lcd.SetOrientation(RA8875::normal);
/// lcd.puts(30,30, "Normal Landscape");
/// wait_ms(2500);
///
/// lcd.cls();
/// lcd.SetOrientation(RA8875::rotate_90);
/// lcd.puts(30,30, "Rotated 90 Text\r\n");
/// wait_ms(2500);
///
/// lcd.cls();
/// lcd.SetOrientation(RA8875::rotate_180);
/// lcd.puts(30,30, "Rotated 180 Text\r\n");
/// wait_ms(2500);
///
/// lcd.cls();
/// lcd.SetOrientation(RA8875::rotate_270);
/// lcd.puts(30,30, "Rotated 270 Text\r\n");
/// wait_ms(2500);
/// @endcode
///
/// @param[in] angle defaults to normal, but can be rotated
/// - normal | rotate_0
/// - rotate_90 (clockwise)
/// - rotate_180
/// - rotate_270 (clockwise)
/// @returns success/failure code. See @ref RetCode_t.
///
RetCode_t SetOrientation(orientation_t angle = normal);
/// Control the font behavior.
///
/// This command lets you make several modifications to any text that
/// will be written to the screen.
///
/// @caution This command only operates on the RA8875 internal fonts.
///
/// Options can be combined:
/// Default:
/// @li Full alignment disabled,
/// @li Font with Background color,
/// @li Font in normal orientiation, or rotated 90, 180, or 270 clockwise,
/// @li Horizontal scale x 1, 2, 3, or 4
/// @li Vertical scale x 1, 2, 3, or 4
///
/// @note alignment is a special mode for the fonts, when mixing half and
/// full fonts on one presentation. 'align_full' starts each full
/// character on an even alignment. See section 7-4-7 of the RA8875
/// specification.
///
/// @param[in] fillit defaults to FILL, but can be NOFILL
/// @param[in] hScale defaults to 1, but can be 1, 2, 3, or 4,
/// and scales the font size by this amount.
/// @param[in] vScale defaults to 1, but can be 1, 2, 3, or 4,
/// and scales the font size by this amount.
/// @param[in] alignment defaults to align_none, but can be
/// align_full.
///
/// @note if either hScale or vScale is outside of its permitted range,
/// the command is not executed.
/// @returns success/failure code. See @ref RetCode_t.
///
RetCode_t SetTextFontControl(fill_t fillit = FILL,
HorizontalScale hScale = 1,
VerticalScale vScale = 1,
alignment_t alignment = align_none);
/// Control the font size of the RA8875 internal fonts.
///
/// This command lets you set the font enlargement for both horizontal
/// and vertical, independent of the rotation, background, and
/// alignment. See @ref SetTextFontControl.
///
/// @caution This command only operates on the RA8875 internal fonts.
///
/// @param[in] hScale defaults to 1, but can be 1, 2, 3, or 4,
/// and scales the font size by this amount.
/// @param[in] vScale is an optional parameter that defaults to the hScale value,
/// but can be 1, 2, 3, or 4, and scales the font size by this amount.
///
/// @code
/// lcd.SetTextFontSize(2); // Set the font to 2x normal size
/// lcd.puts("Two times");
/// lcd.SetTextFontSize(2,3); // Set the font to 2x Width and 3x Height
/// lcd.puts("2*2 3*h");
/// lcd.SetTextFontSize(); // Restore to normal size in both dimensions
/// lcd.puts("normal");
/// @endcode
///
/// @note if either hScale or vScale is outside of its permitted range,
/// the command is not executed.
/// @returns success/failure code. See @ref RetCode_t.
///
RetCode_t SetTextFontSize(HorizontalScale hScale = 1, VerticalScale vScale = -1);
/// put a character on the screen.
///
/// @param[in] c is the character.
/// @returns the character, or EOF if there is an error.
///
virtual int _putc(int c);
/// Write string of text to the display
///
/// @code
/// lcd.puts("Test STring");
/// @endcode
///
/// @param[in] string is the null terminated string to send to the display.
///
void puts(const char * string);
/// Write string of text to the display at the specified location.
///
/// @code
/// lcd.puts(10,25, "Test STring");
/// @endcode
///
/// @param[in] x is the horizontal position in pixels (from the left edge)
/// @param[in] y is the vertical position in pixels (from the top edge)
/// @param[in] string is the null terminated string to send to the display.
///
void puts(loc_t x, loc_t y, const char * string);
/// Prepare the controller to write binary data to the screen by positioning
/// the memory cursor.
///
/// @param[in] x is the horizontal position in pixels (from the left edge)
/// @param[in] y is the vertical position in pixels (from the top edge)
/// @returns success/failure code. See @ref RetCode_t.
///
virtual RetCode_t SetGraphicsCursor(loc_t x, loc_t y);
/// Prepare the controller to read binary data from the screen by positioning
/// the memory read cursor.
///
/// @param[in] x is the horizontal position in pixels (from the left edge)
/// @param[in] y is the vertical position in pixels (from the top edge)
/// @returns success/failure code. See @ref RetCode_t.
///
virtual RetCode_t SetGraphicsCursorRead(loc_t x, loc_t y);
/// Set the window, which controls where items are written to the screen.
///
/// When something hits the window width, it wraps back to the left side
/// and down a row. If the initial write is outside the window, it will
/// be captured into the window when it crosses a boundary.
///
/// @code
/// lcd.window(10,10, 80,80);
/// lcd.puts("012345678901234567890123456789012345678901234567890");
/// @endcode
///
/// @param[in] x is the left edge in pixels.
/// @param[in] y is the top edge in pixels.
/// @param[in] width is the window width in pixels.
/// @param[in] height is the window height in pixels.
/// @returns success/failure code. See @ref RetCode_t.
///
virtual RetCode_t window(loc_t x, loc_t y, dim_t width, dim_t height);
/// Clear either the specified layer, or the active layer.
///
/// The behavior is to clear the whole screen for the specified
/// layer. When not specified, the active drawing layer is cleared.
/// This command can also be used to specifically clear either,
/// or both layers. See @ref clsw().
///
/// @code
/// lcd.cls();
/// @endcode
///
/// @param[in] layers is optional. If not provided, the active layer
/// is cleared. If bit 0 is set, layer 0 is cleared, if bit
/// 1 is set, layer 1 is cleared. If both are set, both layers
/// are cleared. Any other value does not cause an action.
///
/// @returns success/failure code. See @ref RetCode_t.
///
virtual RetCode_t cls(uint16_t layers = 0);
/// Clear the screen, or clear only the active window.
///
/// The default behavior is to clear the whole screen. With the optional
/// parameter, the action can be restricted to the active window, which
/// can be set with the See @ref window method.
///
/// @code
/// lcd.window(20,20, 40,10);
/// lcd.clsw();
/// @endcode
///
/// @param[in] region is an optional parameter that defaults to FULLWINDOW
/// or may be set to ACTIVEWINDOW.
/// @returns success/failure code. See @ref RetCode_t.
///
RetCode_t clsw(RA8875::Region_t region = FULLWINDOW);
/// Set the background color.
///
/// @param[in] color is expressed in 16-bit format.
/// @returns success/failure code. See @ref RetCode_t.
///
virtual RetCode_t background(color_t color);
/// Set the background color.
///
/// @param[in] r is the red element of the color.
/// @param[in] g is the green element of the color.
/// @param[in] b is the blue element of the color.
/// @returns success/failure code. See @ref RetCode_t.
///
virtual RetCode_t background(unsigned char r, unsigned char g, unsigned char b);
/// Set the foreground color.
///
/// @param[in] color is expressed in 16-bit format.
/// @returns success/failure code. See @ref RetCode_t.
///
virtual RetCode_t foreground(color_t color);
/// Set the foreground color.
///
/// @param[in] r is the red element of the color.
/// @param[in] g is the green element of the color.
/// @param[in] b is the blue element of the color.
/// @returns success/failure code. See @ref RetCode_t.
///
virtual RetCode_t foreground(unsigned char r, unsigned char g, unsigned char b);
/// Get the current foreground color value.
///
/// @returns the current foreground color.
///
color_t GetForeColor(void);
/// Draw a pixel in the specified color.
///
/// @note Unlike many other operations, this does not
/// set the forecolor!
///
/// @param[in] p is the point_t defining the location.
/// @returns success/failure code. See @ref RetCode_t.
///
virtual RetCode_t pixel(point_t p, color_t color);
/// Draw a pixel in the current foreground color.
///
/// @param[in] p is the point_t defining the location.
/// @returns success/failure code. See @ref RetCode_t.
///
virtual RetCode_t pixel(point_t p);
/// Draw a pixel in the specified color.
///
/// @note Unlike many other operations, this does not
/// set the forecolor!
///
/// @param[in] x is the horizontal offset to this pixel.
/// @param[in] y is the vertical offset to this pixel.
/// @param[in] color defines the color for the pixel.
/// @returns success/failure code. See @ref RetCode_t.
///
virtual RetCode_t pixel(loc_t x, loc_t y, color_t color);
/// Draw a pixel in the current foreground color.
///
/// @param[in] x is the horizontal offset to this pixel.
/// @param[in] y is the veritical offset to this pixel.
/// @returns success/failure code. See @ref RetCode_t.
///
virtual RetCode_t pixel(loc_t x, loc_t y);
/// Get a pixel from the display.
///
/// @param[in] x is the horizontal offset to this pixel.
/// @param[in] y is the vertical offset to this pixel.
/// @returns the pixel. see @color_t
///
virtual color_t getPixel(loc_t x, loc_t y);
/// Write a stream of pixels to the display.
///
/// @param[in] p is a pointer to a color_t array to write.
/// @param[in] count is the number of pixels to write.
/// @param[in] x is the horizontal position on the display.
/// @param[in] y is the vertical position on the display.
/// @returns success/failure code. See @ref RetCode_t.
///
virtual RetCode_t pixelStream(color_t * p, uint32_t count, loc_t x, loc_t y);
/// Get a stream of pixels from the display.
///
/// @param[in] p is a pointer to a color_t array to accept the stream.
/// @param[in] count is the number of pixels to read.
/// @param[in] x is the horizontal offset to this pixel.
/// @param[in] y is the vertical offset to this pixel.
/// @returns success/failure code. See @ref RetCode_t.
///
virtual RetCode_t getPixelStream(color_t * p, uint32_t count, loc_t x, loc_t y);
/// Draw a line in the specified color
///
/// @note As a side effect, this changes the current
/// foreground color for subsequent operations.
///
/// @param[in] p1 is the point to start the line.
/// @param[in] p2 is the point to end the line.
/// @param[in] color defines the foreground color.
/// @returns success/failure code. See @ref RetCode_t.
///
RetCode_t line(point_t p1, point_t p2, color_t color);
/// Draw a line
///
/// Draws a line using the foreground color setting.
///
/// @param[in] p1 is the point to start the line.
/// @param[in] p2 is the point to end the line.
/// @returns success/failure code. See @ref RetCode_t.
///
RetCode_t line(point_t p1, point_t p2);
/// Draw a line in the specified color
///
/// @note As a side effect, this changes the current
/// foreground color for subsequent operations.
///
/// @param[in] x1 is the horizontal start of the line.
/// @param[in] y1 is the vertical start of the line.
/// @param[in] x2 is the horizontal end of the line.
/// @param[in] y2 is the vertical end of the line.
/// @param[in] color defines the foreground color.
/// @returns success/failure code. See @ref RetCode_t.
///
RetCode_t line(loc_t x1, loc_t y1, loc_t x2, loc_t y2, color_t color);
/// Draw a line
///
/// Draws a line using the foreground color setting.
///
/// @param[in] x1 is the horizontal start of the line.
/// @param[in] y1 is the vertical start of the line.
/// @param[in] x2 is the horizontal end of the line.
/// @param[in] y2 is the vertical end of the line.
/// @returns success/failure code. See @ref RetCode_t.
///
RetCode_t line(loc_t x1, loc_t y1, loc_t x2, loc_t y2);
/// Draw a rectangle in the specified color
///
/// @note As a side effect, this changes the current
/// foreground color for subsequent operations.
///
/// @param[in] rect defines the rectangle.
/// @param[in] color defines the foreground color.
/// @param[in] fillit is optional to FILL the rectangle. default is NOFILL.
/// @returns success/failure code. See @ref RetCode_t.
///
RetCode_t rect(rect_t rect, color_t color, fill_t fillit = NOFILL);
/// Draw a filled rectangle in the specified color
///
/// @note As a side effect, this changes the current
/// foreground color for subsequent operations.
///
/// @param[in] rect defines the rectangle.
/// @param[in] color defines the foreground color.
/// @param[in] fillit is optional to FILL the rectangle. default is NOFILL.
/// @returns success/failure code. See @ref RetCode_t.
///
RetCode_t fillrect(rect_t rect, color_t color, fill_t fillit = FILL);
/// Draw a rectangle in the specified color
///
/// @note As a side effect, this changes the current
/// foreground color for subsequent operations.
///
/// @param[in] x1 is the horizontal start of the line.
/// @param[in] y1 is the vertical start of the line.
/// @param[in] x2 is the horizontal end of the line.
/// @param[in] y2 is the vertical end of the line.
/// @param[in] color defines the foreground color.
/// @param[in] fillit is optional to FILL the rectangle. default is FILL.
/// @returns success/failure code. See @ref RetCode_t.
///
RetCode_t rect(loc_t x1, loc_t y1, loc_t x2, loc_t y2,
color_t color, fill_t fillit = NOFILL);
/// Draw a filled rectangle in the specified color
///
/// @note As a side effect, this changes the current
/// foreground color for subsequent operations.
///
/// @param[in] x1 is the horizontal start of the line.
/// @param[in] y1 is the vertical start of the line.
/// @param[in] x2 is the horizontal end of the line.
/// @param[in] y2 is the vertical end of the line.
/// @param[in] color defines the foreground color.
/// @param[in] fillit is optional to NOFILL the rectangle. default is FILL.
/// @returns success/failure code. See @ref RetCode_t.
///
virtual RetCode_t fillrect(loc_t x1, loc_t y1, loc_t x2, loc_t y2,
color_t color, fill_t fillit = FILL);
/// Draw a rectangle
///
/// Draws a rectangle using the foreground color setting.
///
/// @param[in] x1 is the horizontal start of the line.
/// @param[in] y1 is the vertical start of the line.
/// @param[in] x2 is the horizontal end of the line.
/// @param[in] y2 is the vertical end of the line.
/// @param[in] fillit is optional to FILL the rectangle. default is NOFILL.
/// @returns success/failure code. See @ref RetCode_t.
///
RetCode_t rect(loc_t x1, loc_t y1, loc_t x2, loc_t y2,
fill_t fillit = NOFILL);
/// Draw a filled rectangle with rounded corners using the specified color.
///
/// This draws a rounded rectangle. A numbers of checks are made on the values,
/// and it could reduce this to drawing a line (if either x1 == x2, or y1 == y2),
/// or a single point (x1 == x2 && y1 == y2). If the radius parameters are
/// > 1/2 the length of that side (width or height), an error value is returned.
///
/// @note As a side effect, this changes the current
/// foreground color for subsequent operations.
///
/// @param[in] x1 is the horizontal start of the line and must be <= x2.
/// @param[in] y1 is the vertical start of the line and must be <= y2.
/// @param[in] x2 is the horizontal end of the line and must be >= x1.
/// @param[in] y2 is the vertical end of the line and must be >= y1.
/// @param[in] radius1 defines the horizontal radius of the curved corner. Take care
/// that this value < 1/2 the width of the rectangle, or bad_parameter
/// is returned.
/// @param[in] radius2 defines the vertical radius of the curved corner. Take care
/// that this value < 1/2 the height of the rectangle, or bad_parameter
/// is returned.
/// @param[in] color defines the foreground color.
/// @param[in] fillit is optional to FILL the rectangle. default is NOFILL.
/// @returns success/failure code. See @ref RetCode_t.
///
RetCode_t fillroundrect(loc_t x1, loc_t y1, loc_t x2, loc_t y2,
dim_t radius1, dim_t radius2, color_t color, fill_t fillit = FILL);
/// Draw a rectangle with rounded corners using the specified color.
///
/// This draws a rounded rectangle. A numbers of checks are made on the values,
/// and it could reduce this to drawing a line (if either x1 == x2, or y1 == y2),
/// or a single point (x1 == x2 && y1 == y2). If the radius parameters are
/// > 1/2 the length of that side (width or height), an error value is returned.
///
/// @note As a side effect, this changes the current
/// foreground color for subsequent operations.
///
/// @param[in] x1 is the horizontal start of the line and must be <= x2.
/// @param[in] y1 is the vertical start of the line and must be <= y2.
/// @param[in] x2 is the horizontal end of the line and must be >= x1.
/// @param[in] y2 is the vertical end of the line and must be >= y1.
/// @param[in] radius1 defines the horizontal radius of the curved corner. Take care
/// that this value < 1/2 the width of the rectangle, or bad_parameter
/// is returned.
/// @param[in] radius2 defines the vertical radius of the curved corner. Take care
/// that this value < 1/2 the height of the rectangle, or bad_parameter
/// is returned.
/// @param[in] color defines the foreground color.
/// @param[in] fillit is optional to FILL the rectangle. default is NOFILL.
/// @returns success/failure code. See @ref RetCode_t.
///
RetCode_t roundrect(loc_t x1, loc_t y1, loc_t x2, loc_t y2,
dim_t radius1, dim_t radius2, color_t color, fill_t fillit = NOFILL);
/// Draw a rectangle with rounded corners.
///
/// This draws a rounded rectangle. A numbers of checks are made on the values,
/// and it could reduce this to drawing a line (if either x1 == x2, or y1 == y2),
/// or a single point (x1 == x2 && y1 == y2). If the radius parameters are
/// > 1/2 the length of that side (width or height), an error value is returned.
///
/// @param[in] x1 is the horizontal start of the line and must be <= x2.
/// @param[in] y1 is the vertical start of the line and must be <= y2.
/// @param[in] x2 is the horizontal end of the line and must be >= x1.
/// @param[in] y2 is the vertical end of the line and must be >= y1.
/// @param[in] radius1 defines the horizontal radius of the curved corner. Take care
/// that this value < 1/2 the width of the rectangle, or bad_parameter
/// is returned.
/// @param[in] radius2 defines the vertical radius of the curved corner. Take care
/// that this value < 1/2 the height of the rectangle, or bad_parameter
/// is returned.
/// @param[in] fillit is optional to FILL the rectangle. default is NOFILL.
/// @returns success/failure code. See @ref RetCode_t.
///
RetCode_t roundrect(loc_t x1, loc_t y1, loc_t x2, loc_t y2,
dim_t radius1, dim_t radius2, fill_t fillit = NOFILL);
/// Draw a triangle in the specified color.
///
/// @note As a side effect, this changes the current
/// foreground color for subsequent operations.
///
/// @param[in] x1 is the horizontal for point 1.
/// @param[in] y1 is the vertical for point 1.
/// @param[in] x2 is the horizontal for point 2.
/// @param[in] y2 is the vertical for point 2.
/// @param[in] x3 is the horizontal for point 3.
/// @param[in] y3 is the vertical for point 3.
/// @param[in] color defines the foreground color.
/// @param[in] fillit is optional to FILL the rectangle. default is NOFILL.
/// @returns success/failure code. See @ref RetCode_t.
///
RetCode_t triangle(loc_t x1, loc_t y1, loc_t x2, loc_t y2,
loc_t x3, loc_t y3, color_t color, fill_t fillit = NOFILL);
/// Draw a filled triangle in the specified color.
///
/// @note As a side effect, this changes the current
/// foreground color for subsequent operations.
///
/// @param[in] x1 is the horizontal for point 1.
/// @param[in] y1 is the vertical for point 1.
/// @param[in] x2 is the horizontal for point 2.
/// @param[in] y2 is the vertical for point 2.
/// @param[in] x3 is the horizontal for point 3.
/// @param[in] y3 is the vertical for point 3.
/// @param[in] color defines the foreground color.
/// @param[in] fillit is optional to FILL the rectangle. default is NOFILL.
/// @returns success/failure code. See @ref RetCode_t.
///
RetCode_t filltriangle(loc_t x1, loc_t y1, loc_t x2, loc_t y2,
loc_t x3, loc_t y3, color_t color, fill_t fillit = FILL);
/// Draw a triangle
///
/// Draws a triangle using the foreground color setting.
///
/// @param[in] x1 is the horizontal for point 1.
/// @param[in] y1 is the vertical for point 1.
/// @param[in] x2 is the horizontal for point 2.
/// @param[in] y2 is the vertical for point 2.
/// @param[in] x3 is the horizontal for point 3.
/// @param[in] y3 is the vertical for point 3.
/// @param[in] fillit is optional to FILL the rectangle. default is NOFILL.
/// @returns success/failure code. See @ref RetCode_t.
///
RetCode_t triangle(loc_t x1, loc_t y1, loc_t x2, loc_t y2,
loc_t x3, loc_t y3, fill_t fillit = NOFILL);
/// Draw a circle using the specified color.
///
/// @note As a side effect, this changes the current
/// foreground color for subsequent operations.
///
/// @param[in] p defines the center of the circle.
/// @param[in] radius defines the size of the circle.
/// @param[in] color defines the foreground color.
/// @returns success/failure code. See @ref RetCode_t.
///
RetCode_t circle(point_t p, dim_t radius, color_t color, fill_t fillit = NOFILL);
/// Draw a filled circle using the specified color.
///
/// @note As a side effect, this changes the current
/// foreground color for subsequent operations.
///
/// @param[in] p defines the center of the circle.
/// @param[in] radius defines the size of the circle.
/// @param[in] color defines the foreground color.
/// @returns success/failure code. See @ref RetCode_t.
///
RetCode_t fillcircle(point_t p, dim_t radius, color_t color, fill_t fillit = FILL);
/// Draw a circle.
///
/// Draws a circle using the foreground color setting.
///
/// @param[in] p defines the center of the circle.
/// @param[in] radius defines the size of the circle.
/// @returns success/failure code. See @ref RetCode_t.
///
RetCode_t circle(point_t p, dim_t radius, fill_t fillit = NOFILL);
/// Draw a circle using the specified color.
///
/// @note As a side effect, this changes the current
/// foreground color for subsequent operations.
///
/// @param[in] x is the horizontal center of the circle.
/// @param[in] y is the vertical center of the circle.
/// @param[in] radius defines the size of the circle.
/// @param[in] color defines the foreground color.
/// @returns success/failure code. See @ref RetCode_t.
///
RetCode_t circle(loc_t x, loc_t y, dim_t radius, color_t color, fill_t fillit = NOFILL);
/// Draw a filled circle using the specified color.
///
/// @note As a side effect, this changes the current
/// foreground color for subsequent operations.
///
/// @param[in] x is the horizontal center of the circle.
/// @param[in] y is the vertical center of the circle.
/// @param[in] radius defines the size of the circle.
/// @param[in] color defines the foreground color.
/// @returns success/failure code. See @ref RetCode_t.
///
RetCode_t fillcircle(loc_t x, loc_t y, dim_t radius, color_t color, fill_t fillit = FILL);
/// Draw a circle.
///
/// Draws a circle using the foreground color setting.
///
/// @param[in] x is the horizontal center of the circle.
/// @param[in] y is the vertical center of the circle.
/// @param[in] radius defines the size of the circle.
/// @returns success/failure code. See @ref RetCode_t.
///
RetCode_t circle(loc_t x, loc_t y, dim_t radius, fill_t fillit = NOFILL);
/// Draw an Ellipse using the specified color
///
/// @note As a side effect, this changes the current
/// foreground color for subsequent operations.
///
/// @param[in] x is the horizontal center of the ellipse.
/// @param[in] y is the vertical center of the ellipse.
/// @param[in] radius1 defines the horizontal radius of the ellipse.
/// @param[in] radius2 defines the vertical radius of the ellipse.
/// @param[in] color defines the foreground color.
/// @param[in] fillit defines whether the circle is filled or not.
/// @returns success/failure code. See @ref RetCode_t.
///
RetCode_t ellipse(loc_t x, loc_t y, dim_t radius1, dim_t radius2,
color_t color, fill_t fillit = NOFILL);
/// Draw a filled Ellipse using the specified color
///
/// @note As a side effect, this changes the current
/// foreground color for subsequent operations.
///
/// @param[in] x is the horizontal center of the ellipse.
/// @param[in] y is the vertical center of the ellipse.
/// @param[in] radius1 defines the horizontal radius of the ellipse.
/// @param[in] radius2 defines the vertical radius of the ellipse.
/// @param[in] color defines the foreground color.
/// @param[in] fillit defines whether the circle is filled or not.
/// @returns success/failure code. See @ref RetCode_t.
///
RetCode_t fillellipse(loc_t x, loc_t y, dim_t radius1, dim_t radius2,
color_t color, fill_t fillit = FILL);
/// Draw an Ellipse
///
/// Draws it using the foreground color setting.
///
/// @param[in] x is the horizontal center of the ellipse.
/// @param[in] y is the vertical center of the ellipse.
/// @param[in] radius1 defines the horizontal radius of the ellipse.
/// @param[in] radius2 defines the vertical radius of the ellipse.
/// @param[in] fillit defines whether the circle is filled or not.
/// @returns success/failure code. See @ref RetCode_t.
///
RetCode_t ellipse(loc_t x, loc_t y, dim_t radius1, dim_t radius2, fill_t fillit = NOFILL);
/// Control display power
///
/// @param[in] on when set to true will turn on the display, when false it is turned off.
/// @returns success/failure code. See @ref RetCode_t.
///
RetCode_t Power(bool on);
/// Reset the display controller via the Software Reset interface.
///
/// @returns success/failure code. See @ref RetCode_t.
///
RetCode_t Reset(void);
/// Set backlight brightness.
///
/// When the built-in PWM is used to control the backlight, this
/// API can be used to set the brightness.
///
/// @param[in] brightness ranges from 0 (off) to 255 (full on)
/// @returns success/failure code. See @ref RetCode_t.
///
RetCode_t Backlight_u8(unsigned char brightness);
/// Get backlight brightness.
///
/// @returns backlight setting from 0 (off) to 255 (full on).
///
uint8_t GetBacklight_u8(void);
/// Set backlight brightness.
///
/// When the built-in PWM is used to control the backlight, this
/// API can be used to set the brightness.
///
/// @param[in] brightness ranges from 0.0 (off) to 1.0 (full on)
/// @returns success/failure code. See @ref RetCode_t.
///
RetCode_t Backlight(float brightness);
/// Get backlight brightness.
///
/// @returns backlight setting from 0 (off) to 1.0 (full on).
///
float GetBacklight(void);
/// Select a User Font for all subsequent text.
///
/// @note Tool to create the fonts is accessible from its creator
/// available at http://www.mikroe.com.
/// For version 1.2.0.0, choose the "Export for TFT and new GLCD"
/// format.
///
/// @param[in] font is a pointer to a specially formed font resource.
/// @returns error code.
///
virtual RetCode_t SelectUserFont(const uint8_t * font = NULL);
typedef uint8_t byte;
/// Get the RGB value for a DOS color.
///
/// @param[in] i is the color, in the range 0 to 15;
/// @returns the RGB color of the selected index, or 0
/// if the index is out of bounds.
///
color_t DOSColor(int i);
/// Get the color name (string) for a DOS color.
///
/// @param[in] i is the color, in the range 0 to 15;
/// @returns a pointer to a string with the color name,
/// or NULL if the index is out of bounds.
///
const char * DOSColorNames(int i);
/// Advanced method indicating the start of a graphics stream.
///
/// This is called prior to a stream of pixel data being sent.
/// This may cause register configuration changes in the derived
/// class in order to prepare the hardware to accept the streaming
/// data.
///
/// Following this command, a series of See @ref _putp() commands can
/// be used to send individual pixels to the screen.
///
/// To conclude the graphics stream, See @ref _EndGraphicsStream should
/// be callled.
///
/// @returns error code.
///
virtual RetCode_t _StartGraphicsStream(void);
/// Advanced method to put a single color pixel to the screen.
///
/// This method may be called as many times as necessary after
/// See @ref _StartGraphicsStream() is called, and it should be followed
/// by _EndGraphicsStream.
///
/// @param[in] pixel is a color value to be put on the screen.
/// @returns error code.
///
virtual RetCode_t _putp(color_t pixel);
/// Advanced method indicating the end of a graphics stream.
///
/// This is called to conclude a stream of pixel data that was sent.
/// This may cause register configuration changes in the derived
/// class in order to stop the hardware from accept the streaming
/// data.
///
/// @returns error code.
///
virtual RetCode_t _EndGraphicsStream(void);
/// Set the SPI port frequency (in Hz).
///
/// This uses the mbed SPI driver, and is therefore dependent on
/// its capabilities. The RA8875 can accept writes via SPI faster
/// than a read can be performed. The frequency set by this API
/// is for the SPI writes. It will automatically reduce the SPI
/// clock rate when a read is performed, and restore it for the
/// next write. Alternately, the 2nd parameters permits setting
/// the read speed rather than letting it compute it automatically.
///
/// @note The primary effect of this is to recover more CPU cycles
/// for your application code. Keep in mind that when more than
/// one command is sent to the display controller, that it
/// will wait for the controller to finish the prior command.
/// In this case, the performance is limited by the RA8875.
///
/// @param[in] Hz is the frequency in Hz, tested range includes the
/// range from 1,000,000 (1MHz) to 10,000,000 (10 MHz). Values
/// outside this range will be accepted, but operation may
/// be unreliable. This depends partially on your hardware design
/// and the wires connecting the display module.
/// The default value is 5,000,000, which should work for most
/// applications as a starting point.
/// @param[in] Hz2 is an optional parameter and will set the read
/// speed independently of the write speed.
/// @returns success/failure code. See @ref RetCode_t.
///
RetCode_t frequency(unsigned long Hz = RA8875_DEFAULT_SPI_FREQ, unsigned long Hz2 = 0);
/// This method captures the specified area as a 24-bit bitmap file.
///
/// Even though this is a 16-bit display, the stored image is in
/// 24-bit format.
///
/// This method will interrogate the current display setting and
/// create a bitmap based on those settings. For instance, if
/// only layer 1 is visible, then the bitmap is only layer 1. However,
/// if there is some other operation in effect (transparent mode).
///
/// @param[in] x is the left edge of the region to capture
/// @param[in] y is the top edge of the region to capture
/// @param[in] w is the width of the region to capture
/// @param[in] h is the height of the region to capture.
/// @param[out] Name_BMP is the filename to write the image to.
/// @return success or error code.
///
RetCode_t PrintScreen(loc_t x, loc_t y, dim_t w, dim_t h, const char *Name_BMP);
/// This method captures the specified area as a 24-bit bitmap file
/// and delivers it to the previously attached callback.
///
/// Even though this is a 16-bit display, the stored image is in
/// 24-bit format.
///
/// This method will interrogate the current display setting and
/// create a bitmap based on those settings. For instance, if
/// only layer 1 is visible, then the bitmap is only layer 1. However,
/// if there is some other operation in effect (transparent mode), it
/// will return the blended image.
///
/// @param[in] x is the left edge of the region to capture
/// @param[in] y is the top edge of the region to capture
/// @param[in] w is the width of the region to capture
/// @param[in] h is the height of the region to capture.
/// @return success or error code.
///
RetCode_t PrintScreen(loc_t x, loc_t y, dim_t w, dim_t h);
/// PrintScreen callback registration.
///
/// This method attaches a simple c-compatible callback of type PrintCallback_T.
/// Then, the PrintScreen(x,y,w,h) method is called. Each chunk of data in the
/// BMP file to be created is passed to this callback.
///
/// @param callback is the callback function.
///
void AttachPrintHandler(PrintCallback_T callback) { c_callback = callback; }
/// PrintScreen callback registration.
///
/// This method attaches a c++ class method as a callback of type PrintCallback_T.
/// Then, the PrintScreen(x,y,w,h) method is called. Each chunk of data in the
/// BMP file to be created is passed to this callback.
///
/// @param object is the class hosting the callback function.
/// @param method is the callback method in the object to activate.
///
template <class T>
void AttachPrintHandler(T *object, RetCode_t (T::*method)(void)) {
obj_callback = (FPointerDummy *)object;
method_callback = (uint32_t (FPointerDummy::*)(uint32_t))method;
}
/// This method captures the specified area as a 24-bit bitmap file,
/// including the option of layer selection.
///
/// @caution This method is deprecated as the alternate PrintScreen API
/// automatically examines the display layer configuration.
/// Therefore, calls to this API will ignore the layer parameter
/// and automatically execute the other method.
///
/// Even though this is a 16-bit display, the stored image is in
/// 24-bit format.
///
/// @param[in] layer is 0 or 1 to select the layer to extract.
/// @param[in] x is the left edge of the region to capture
/// @param[in] y is the top edge of the region to capture
/// @param[in] w is the width of the region to capture
/// @param[in] h is the height of the region to capture.
/// @param[out] Name_BMP is the filename to write the image to.
/// @return success or error code.
///
RetCode_t PrintScreen(uint16_t layer, loc_t x, loc_t y, dim_t w, dim_t h, const char *Name_BMP);
#ifdef PERF_METRICS
/// Clear the performance metrics to zero.
void ClearPerformance();
/// Count idle time.
///
/// @param[in] t is the amount of idle time to accumulate.
///
void CountIdleTime(uint32_t t);
/// Report the performance metrics for drawing functions using
/// the available serial channel.
///
/// @param[in,out] pc is the serial channel to write to.
///
void ReportPerformance(Serial & pc);
#endif
private:
/// Touch Panel register name definitions
#define TPCR0 0x70
#define TPCR1 0x71
#define TPXH 0x72
#define TPYH 0x73
#define TPXYL 0x74
#define INTC1 0xF0
#define INTC2 0xF1
/// Specify the default settings for the Touch Panel, where different from the chip defaults
#define TP_MODE_DEFAULT TP_MODE_AUTO
#define TP_DEBOUNCE_DEFAULT TP_DEBOUNCE_ON
#define TP_ADC_CLKDIV_DEFAULT TP_ADC_CLKDIV_8
#define TP_ADC_SAMPLE_DEFAULT_CLKS TP_ADC_SAMPLE_8192_CLKS
/// Other Touch Panel params
#define TPBUFSIZE 16 // Depth of the averaging buffers for x and y data
// Needs both a ticker and a timer. (could have created a timer from the ticker, but this is easier).
// on a touch, the timer is reset.
// the ticker monitors the timer to see if it has been a long time since
// a touch, and if so, it then clears the sample counter so it doesn't get partial old
// and partial new.
/// Touch State used by TouchPanelReadable. See @ref TouchCode_t.
TouchCode_t touchState;
/// Touch Panel ticker
Ticker touchTicker;
/// Touch Panel timer
Timer touchTimer;
/// keeps track of which sample we're collecting to filter out the noise.
int touchSample;
/// Private function for touch ticker callback.
void _TouchTicker(void);
/// Touch Panel calibration matrix.
tpMatrix_t tpMatrix;
/// Internal function to put a character using the built-in (internal) font engine
///
/// @param[in] c is the character to put to the screen.
/// @returns the character put.
///
int _internal_putc(int c);
/// Internal function to put a character using the external font engine
///
/// @param[in] c is the character to put to the screen.
/// @returns the character put.
///
int _external_putc(int c);
/// Internal function to get the actual width of a character when using the external font engine
///
/// @param[in] c is the character to get the width.
/// @returns the width in pixels of the character. zero if not found.
///
int _external_getCharWidth(int c);
/// Convert a 16-bit color value to an 8-bit value
///
/// @param[in] c16 is the 16-bit color value to convert.
/// @returns 8-bit color value.
///
uint8_t _cvt16to8(color_t c16);
/// Convert an 8-bit color value to a 16-bit value
///
/// @param[in] c8 is the 8-bit color value to convert.
/// @returns 16-bit color value.
///
color_t _cvt8to16(uint8_t c8);
/// Select the peripheral to use it.
///
/// @param[in] chipsel when true will select the peripheral, and when false
/// will deselect the chip. This is the logical selection, and
/// the pin selection is the invert of this.
/// @returns success/failure code. See @ref RetCode_t.
///
RetCode_t _select(bool chipsel);
/// Wait while the status register indicates the controller is busy.
///
/// @param[in] mask is the mask of bits to monitor.
/// @returns true if a normal exit.
/// @returns false if a timeout exit.
///
bool _WaitWhileBusy(uint8_t mask);
/// Wait while the the register anded with the mask is true.
///
/// @param[in] reg is the register to monitor
/// @param[in] mask is the bit mask to monitor
/// @returns true if it was a normal exit
/// @returns false if it was a timeout that caused the exit.
///
bool _WaitWhileReg(uint8_t reg, uint8_t mask);
/// set the spi port to either the write or the read speed.
///
/// This is a private API used to toggle between the write
/// and the read speed for the SPI port to the RA8875, since
/// it can accept writes faster than reads.
///
/// @param[in] writeSpeed when true selects the write frequency,
/// and when false it selects the read frequency.
///
void _setWriteSpeed(bool writeSpeed);
/// The most primitive - to write a data value to the SPI interface.
///
/// @param[in] data is the value to write.
/// @returns a value read from the port, since SPI is often shift
/// in while shifting out.
///
unsigned char _spiwrite(unsigned char data);
/// The most primitive - to read a data value to the SPI interface.
///
/// This is really just a specialcase of the write command, where
/// the value zero is written in order to read.
///
/// @returns a value read from the port, since SPI is often shift
/// in while shifting out.
///
unsigned char _spiread();
const uint8_t * pKeyMap;
SPI spi; ///< spi port
bool spiWriteSpeed; ///< indicates if the current mode is write or read
unsigned long spiwritefreq; ///< saved write freq
unsigned long spireadfreq; ///< saved read freq
DigitalOut cs; ///< chip select pin, assumed active low
DigitalOut res; ///< reset pin, assumed active low
// display metrics to avoid lengthy spi read queries
uint8_t screenbpp; ///< configured bits per pixel
dim_t screenwidth; ///< configured screen width
dim_t screenheight; ///< configured screen height
bool portraitmode; ///< set true when in portrait mode (w,h are reversed)
const unsigned char * font; ///< reference to an external font somewhere in memory
uint8_t extFontHeight; ///< computed from the font table when the user sets the font
uint8_t extFontWidth; ///< computed from the font table when the user sets the font
loc_t cursor_x, cursor_y; ///< used for external fonts only
#ifdef PERF_METRICS
typedef enum
{
PRF_CLS,
PRF_DRAWPIXEL,
PRF_PIXELSTREAM,
PRF_READPIXEL,
PRF_READPIXELSTREAM,
PRF_DRAWLINE,
PRF_DRAWRECTANGLE,
PRF_DRAWROUNDEDRECTANGLE,
PRF_DRAWTRIANGLE,
PRF_DRAWCIRCLE,
PRF_DRAWELLIPSE,
METRICCOUNT
} method_e;
unsigned long metrics[METRICCOUNT];
unsigned long idletime_usec;
void RegisterPerformance(method_e method);
Timer performance;
#endif
RetCode_t _printCallback(RA8875::filecmd_t cmd, uint8_t * buffer, uint16_t size);
FILE * _printFH; ///< PrintScreen file handle
RetCode_t privateCallback(filecmd_t cmd, uint8_t * buffer, uint16_t size) {
if (c_callback != NULL) {
return (*c_callback)(cmd, buffer, size);
}
else {
if (obj_callback != NULL && method_callback != NULL) {
return (obj_callback->*method_callback)(cmd, buffer, size);
}
}
return noerror;
}
RetCode_t (* c_callback)(filecmd_t cmd, uint8_t * buffer, uint16_t size);
FPointerDummy *obj_callback;
RetCode_t (FPointerDummy::*method_callback)(filecmd_t cmd, uint8_t * buffer, uint16_t size);
};
//} // namespace
//using namespace SW_graphics;
#ifdef TESTENABLE
// ______________ ______________ ______________ _______________
// /_____ _____/ / ___________/ / ___________/ /_____ ______/
// / / / / / / / /
// / / / /___ / /__________ / /
// / / / ____/ /__________ / / /
// / / / / / / / /
// / / / /__________ ___________/ / / /
// /__/ /_____________/ /_____________/ /__/
#include "WebColors.h"
#include <algorithm>
extern "C" void mbed_reset();
/// This activates a small set of tests for the graphics library.
///
/// Call this API and pass it the reference to the display class.
/// It will then run a series of tests. It accepts interaction via
/// stdin to switch from automatic test mode to manual, run a specific
/// test, or to exit the test mode.
///
/// @param[in] lcd is a reference to the display class.
/// @param[in] pc is a reference to a serial interface, typically the USB to PC.
///
void RunTestSet(RA8875 & lcd, Serial & pc);
// To enable the test code, uncomment this section, or copy the
// necessary pieces to your "main()".
//
// #include "mbed.h"
// #include "RA8875.h"
// RA8875 lcd(p5, p6, p7, p12, NC, "tft"); // MOSI, MISO, SCK, /ChipSelect, /reset, name
// Serial pc(USBTX, USBRX);
// extern "C" void mbed_reset();
// int main()
// {
// pc.baud(460800); // I like a snappy terminal, so crank it up!
// pc.printf("\r\nRA8875 Test - Build " __DATE__ " " __TIME__ "\r\n");
//
// pc.printf("Turning on display\r\n");
// lcd.init();
// lcd.Reset();
// lcd.Power(true); // display power is on, but the backlight is independent
// lcd.Backlight(0.5);
// RunTestSet(lcd, pc);
// }
#endif // TESTENABLE
#endif