main.cpp

00001 /*
00002  * e-Paper control program
00003  *
00004  * Copyright (c) 2019 Kenji Arai / JH1PJL
00005  *  http://www.page.sannet.ne.jp/kenjia/index.html
00006  *  http://mbed.org/users/kenjiArai/
00007  *      Created:    April     27th, 2019
00008  *      Revised:    August    29th, 2019
00009  *
00010  *  Tested on nRF52-DK with mbed-os5.13.3
00011  *
00012  *  Refrence software
00013  *  https://github.com/waveshare/e-Paper
00014  *  https://os.mbed.com/users/imachooon/code/epd1in54/
00015  *          Thanks imamura-san
00016  *
00017  *  Technical documents
00018  *  https://www.waveshare.com/wiki/2.13inch_e-Paper_HAT_(B)
00019  *
00020  *  Product
00021  *  http://akizukidenshi.com/catalog/g/gP-13757/
00022  *  https://www.waveshare.com/2.13inch-e-paper-hat-b.htm
00023  */
00024 
00025 //  Include --------------------------------------------------------------------
00026 #include "mbed.h"
00027 #include "epd4in2b.h"
00028 #include "epdpaint.h"
00029 
00030 //  Definition -----------------------------------------------------------------
00031 #define COLORED     0
00032 #define UNCOLORED   1
00033 
00034 #define DEBUG  0
00035 
00036 #if DEBUG
00037 #define DBG(...)    pc.printf(__VA_ARGS__)
00038 #else
00039 #define DBG(...)    {;}
00040 #endif
00041 
00042 //  Constructor ----------------------------------------------------------------
00043 #if defined(TARGET_NRF52832)
00044 //             mosi,miso,  sclk,    cs,    dc,   rst, busy,   pwr
00045 Epd epd = Epd(P0_23,  NC, P0_25, P0_22, P0_19, P0_20, P0_2, P0_11);
00046 DigitalIn button1(P0_13);
00047 #elif defined(TARGET_NRF52840)
00048 //             mosi,miso,  sclk,    cs,    dc,   rst, busy,   pwr
00049 Epd epd = Epd(P1_13,  NC, P1_15, P1_12, P1_10, P1_11, P0_2, P1_1);
00050 DigitalIn button1(P0_11);
00051 #else
00052 #error "Only for nRF52840 & nRF52832 CPU"
00053 #endif
00054 Serial pc(USBTX, USBRX);
00055 Timer t;
00056 
00057 //  RAM ------------------------------------------------------------------------
00058 uint8_t image[EPD_HEIGHT*(EPD_WIDTH/8 + 1)];
00059 
00060 //  ROM / Constant data --------------------------------------------------------
00061 
00062 //  Function prototypes --------------------------------------------------------
00063 extern void time_enter_mode(void);
00064 
00065 //------------------------------------------------------------------------------
00066 //  Control Program
00067 //------------------------------------------------------------------------------
00068 void set_p14_for_detect()
00069 {
00070     NRF_GPIO->PIN_CNF[14] = 3UL << 16;  // BTN2
00071 }
00072 
00073 int main()
00074 {
00075     time_t seconds;
00076     char buf[32];
00077 
00078     DBG("line:%d\r\n", __LINE__);
00079     t.reset();
00080     t.start();
00081     if (button1 == 0) {  // USER BUTTON1 is on then go to time enter mode
00082         time_enter_mode();
00083     }
00084     epd.PwrOn();
00085     ThisThread::sleep_for(10);
00086     DBG("line:%d\r\n", __LINE__);
00087     seconds = time(NULL);   // read current time
00088     if (epd.Init() != 0) {  // initialize e-Paper control program
00089         printf("e-Paper init failed");
00090         return -1;
00091     }
00092     DBG("line:%d\r\n", __LINE__);
00093     epd.ClearFrame();
00094     ThisThread::sleep_for(200);
00095     Paint paint(image, EPD_WIDTH, EPD_HEIGHT);
00096     paint.Clear(UNCOLORED);
00097     //paint.SetRotate(ROTATE_90);
00098     DBG("line:%d\r\n", __LINE__);
00099     paint.DrawStringAt(0,  4,  "123456789012345678901234567890123456789012345678901234567890",
00100                        &Font12, COLORED);
00101     paint.DrawStringAt(0, 16, "  Waveshare 4.2 e-Paper WBY",
00102                        &Font12, COLORED);
00103     paint.DrawStringAt(0, 30, "Run on mbed-os5.13.4 Latest Revision",
00104                        &Font16, COLORED);
00105     paint.DrawStringAt(0, 45, "   tested on Nordic nRF52-DK & nRF52840-DK",
00106                        &Font12, COLORED);
00107     paint.DrawStringAt(0, 58, "         by JH1PJL Kenji Arai",
00108                        &Font12, COLORED);
00109     DBG("line:%d\r\n", __LINE__);
00110     strftime(buf, 30, "'%y-%m-%d %H:%M", localtime(&seconds));
00111     paint.DrawStringAt(0, 90, buf, &Font16, COLORED);
00112     strftime(buf, 30, " %B %d,'%y, %H:%M:%S", localtime(&seconds));
00113     pc.puts(buf);
00114     paint.DrawStringAt(0, 110, " e-Paper 4.2inch",
00115                        &Font8, COLORED);
00116     paint.DrawStringAt(0, 120, " e-Paper 4.2inch",
00117                        &Font12, COLORED);
00118     paint.DrawStringAt(0, 135, " e-Paper 4.2inch",
00119                        &Font16, COLORED);
00120     paint.DrawStringAt(0, 150, " e-Paper 4.2inch",
00121                        &Font20, COLORED);
00122     paint.DrawStringAt(0, 175, " e-Paper 4.2inch",
00123                        &Font24, COLORED);
00124     paint.DrawStringAt(0, 200, " e-Paper 4.2inch",
00125                        &Font2829, COLORED);
00126     paint.DrawStringAt(0, 230, " e-Paper 4.2inch",
00127                        &Font4040, COLORED);
00128 
00129     epd.SetPartialWindowBlack(paint.GetImage(), 0, 8,
00130                               paint.GetWidth(), paint.GetHeight());
00131     paint.Clear(UNCOLORED);
00132     //paint.SetRotate(ROTATE_90);
00133     paint.DrawFilledRectangle(0, 28, 400, 29, COLORED);
00134     paint.DrawFilledRectangle(0, 43, 400, 44, COLORED);
00135     paint.DrawFilledRectangle(0, 74, 350, 80, COLORED);
00136     paint.DrawFilledCircle(350, 76, 30, COLORED);
00137     epd.SetPartialWindowRed(paint.GetImage(), 0, 8,
00138                                paint.GetWidth(), paint.GetHeight());
00139     epd.DisplayFrame();
00140     epd.Sleep();
00141     epd.PwrOff();
00142     ThisThread::sleep_for(1000);
00143     pc.printf("  Display + Refresh time = %5.1f Sec\r\n", t.read());
00144     ThisThread::sleep_for(10);
00145     set_p14_for_detect();
00146     NRF_POWER->SYSTEMOFF = 1;
00147     while(true) {
00148         ;
00149     }
00150     system_reset(); // restart
00151 }