u8g_dev_st7920_202x32.c

00001 /*
00002 
00003   u8g_dev_st7920_202x32.c
00004   tested with CFAG20232
00005   
00006 
00007   Universal 8bit Graphics Library
00008   
00009   Copyright (c) 2011, olikraus@gmail.com
00010   All rights reserved.
00011 
00012   Redistribution and use in source and binary forms, with or without modification, 
00013   are permitted provided that the following conditions are met:
00014 
00015   * Redistributions of source code must retain the above copyright notice, this list 
00016     of conditions and the following disclaimer.
00017     
00018   * Redistributions in binary form must reproduce the above copyright notice, this 
00019     list of conditions and the following disclaimer in the documentation and/or other 
00020     materials provided with the distribution.
00021 
00022   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND 
00023   CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, 
00024   INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
00025   MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 
00026   DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR 
00027   CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 
00028   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 
00029   NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 
00030   LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER 
00031   CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 
00032   STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 
00033   ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 
00034   ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.  
00035   
00036   
00037 */
00038 
00039 #include "u8g.h"
00040 
00041 #define WIDTH 202
00042 #define HEIGHT 32
00043 #define PAGE_HEIGHT 8
00044 
00045 
00046 /* init sequence from https://github.com/adafruit/ST7565-LCD/blob/master/ST7565/ST7565.cpp */
00047 static const uint8_t u8g_dev_st7920_202x32_init_seq[] PROGMEM = {
00048   U8G_ESC_CS(0),             /* disable chip */
00049   U8G_ESC_ADR(0),           /* instruction mode */
00050   U8G_ESC_RST(15),           /* do reset low pulse with (15*16)+2 milliseconds (=maximum delay)*/
00051   U8G_ESC_DLY(100),         /* 8 Dez 2012: additional delay 100 ms because of reset*/
00052   U8G_ESC_CS(1),             /* enable chip */
00053   U8G_ESC_DLY(50),         /* delay 50 ms */
00054 
00055   0x038,                                /* 8 Bit interface (DL=1), basic instruction set (RE=0) */
00056   0x00c,                                /* display on, cursor & blink off; 0x08: all off */
00057   0x006,                                /* Entry mode: Cursor move to right ,DDRAM address counter (AC) plus 1, no shift */
00058   0x002,                                /* disable scroll, enable CGRAM adress */
00059   0x001,                                /* clear RAM, needs 1.6 ms */
00060   U8G_ESC_DLY(100),               /* delay 10 ms */
00061   
00062   U8G_ESC_CS(0),             /* disable chip */
00063   U8G_ESC_END                /* end of sequence */
00064 };
00065 
00066 uint8_t u8g_dev_st7920_202x32_fn(u8g_t *u8g, u8g_dev_t *dev, uint8_t msg, void *arg)
00067 {
00068   switch(msg)
00069   {
00070     case U8G_DEV_MSG_INIT:
00071       u8g_InitCom(u8g, dev, U8G_SPI_CLK_CYCLE_400NS);
00072       u8g_WriteEscSeqP(u8g, dev, u8g_dev_st7920_202x32_init_seq);
00073       break;
00074     case U8G_DEV_MSG_STOP:
00075       break;
00076     case U8G_DEV_MSG_PAGE_NEXT:
00077       {
00078         uint8_t y, i;
00079         uint8_t *ptr;
00080         u8g_pb_t *pb = (u8g_pb_t *)(dev->dev_mem);
00081         
00082         u8g_SetAddress(u8g, dev, 0);           /* cmd mode */
00083         u8g_SetChipSelect(u8g, dev, 1);
00084         y = pb->p.page_y0;
00085         ptr = pb->buf;
00086         for( i = 0; i < 8; i ++ )
00087         {
00088           u8g_SetAddress(u8g, dev, 0);           /* cmd mode */
00089           u8g_WriteByte(u8g, dev, 0x03e );      /* enable extended mode */
00090           u8g_WriteByte(u8g, dev, 0x080 | y );      /* y pos  */
00091           u8g_WriteByte(u8g, dev, 0x080  );      /* set x pos to 0*/          
00092           u8g_SetAddress(u8g, dev, 1);                  /* data mode */
00093           u8g_WriteSequence(u8g, dev, WIDTH/8, ptr);
00094           ptr += WIDTH/8;
00095           y++;
00096         }
00097         u8g_SetChipSelect(u8g, dev, 0);
00098       }
00099       break;
00100   }
00101   return u8g_dev_pb8h1_base_fn(u8g, dev, msg, arg);
00102 }
00103 
00104 uint8_t u8g_dev_st7920_202x32_4x_fn(u8g_t *u8g, u8g_dev_t *dev, uint8_t msg, void *arg)
00105 {
00106   switch(msg)
00107   {
00108     case U8G_DEV_MSG_INIT:
00109       u8g_InitCom(u8g, dev, U8G_SPI_CLK_CYCLE_400NS);
00110       u8g_WriteEscSeqP(u8g, dev, u8g_dev_st7920_202x32_init_seq);
00111       break;
00112     case U8G_DEV_MSG_STOP:
00113       break;
00114     case U8G_DEV_MSG_PAGE_NEXT:
00115       {
00116         uint8_t y, i;
00117         uint8_t *ptr;
00118         u8g_pb_t *pb = (u8g_pb_t *)(dev->dev_mem);
00119         
00120         u8g_SetAddress(u8g, dev, 0);           /* cmd mode */
00121         u8g_SetChipSelect(u8g, dev, 1);
00122         y = pb->p.page_y0;
00123         ptr = pb->buf;
00124         for( i = 0; i < 32; i ++ )
00125         {
00126           u8g_SetAddress(u8g, dev, 0);           /* cmd mode */
00127           u8g_WriteByte(u8g, dev, 0x03e );      /* enable extended mode */
00128           u8g_WriteByte(u8g, dev, 0x080 | y );      /* y pos  */
00129           u8g_WriteByte(u8g, dev, 0x080  );      /* set x pos to 0*/          
00130           u8g_SetAddress(u8g, dev, 1);                  /* data mode */
00131           u8g_WriteSequence(u8g, dev, WIDTH/8, ptr);
00132           ptr += WIDTH/8;
00133           y++;
00134         }
00135         u8g_SetChipSelect(u8g, dev, 0);
00136       }
00137       break;
00138   }
00139   return u8g_dev_pb32h1_base_fn(u8g, dev, msg, arg);
00140 }
00141 
00142 
00143 U8G_PB_DEV(u8g_dev_st7920_202x32_sw_spi, WIDTH, HEIGHT, PAGE_HEIGHT, u8g_dev_st7920_202x32_fn, U8G_COM_ST7920_SW_SPI);
00144 U8G_PB_DEV(u8g_dev_st7920_202x32_hw_spi, WIDTH, HEIGHT, PAGE_HEIGHT, u8g_dev_st7920_202x32_fn, U8G_COM_ST7920_HW_SPI);
00145 U8G_PB_DEV(u8g_dev_st7920_202x32_8bit, WIDTH, HEIGHT, PAGE_HEIGHT, u8g_dev_st7920_202x32_fn, U8G_COM_FAST_PARALLEL);
00146 
00147 #define QWIDTH (WIDTH*4)
00148 uint8_t u8g_dev_st7920_202x32_4x_buf[QWIDTH] U8G_NOCOMMON ; 
00149 u8g_pb_t u8g_dev_st7920_202x32_4x_pb = { {32, HEIGHT, 0, 0, 0},  WIDTH, u8g_dev_st7920_202x32_4x_buf}; 
00150 u8g_dev_t u8g_dev_st7920_202x32_4x_sw_spi = { u8g_dev_st7920_202x32_4x_fn, &u8g_dev_st7920_202x32_4x_pb, U8G_COM_ST7920_SW_SPI };
00151 u8g_dev_t u8g_dev_st7920_202x32_4x_hw_spi = { u8g_dev_st7920_202x32_4x_fn, &u8g_dev_st7920_202x32_4x_pb, U8G_COM_ST7920_HW_SPI };
00152 u8g_dev_t u8g_dev_st7920_202x32_4x_8bit = { u8g_dev_st7920_202x32_4x_fn, &u8g_dev_st7920_202x32_4x_pb, U8G_COM_FAST_PARALLEL };
00153 
00154 
00155