/**************************************************************************** * drivers/lcd/ug-2864ambag01.c * * Licensed to the Apache Software Foundation (ASF) under one or more * contributor license agreements. See the NOTICE file distributed with * this work for additional information regarding copyright ownership. The * ASF licenses this file to you under the Apache License, Version 2.0 (the * "License"); you may not use this file except in compliance with the * License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the * License for the specific language governing permissions and limitations * under the License. * ****************************************************************************/ /* Driver for Univision UG-2864AMBAG01 OLED display (with SH1101A controller) * in SPI mode * * References: * 1. Product Specification (Preliminary), * Part Name: OEL Display Module, Part ID: * UG-2864AMBAG01, Doc No: SASI-9015-A, Univision Technology Inc. * 2. SH1101A, 132 X 64 Dot Matrix OLED/PLED, * Preliminary Segment/Common Driver with * Controller, Sino Wealth */ /**************************************************************************** * Device memory organization: * * +----------------------------+ * | Column | * --------+----+---+---+---+-...-+-----+ * Page | 0 | 1 | 2 | 3 | ... | 131 | * --------+----+---+---+---+-...-+-----+ * Page 0 | D0 | X | | | | | * | D1 | X | | | | | * | D2 | X | | | | | * | D3 | X | | | | | * | D4 | X | | | | | * | D5 | X | | | | | * | D6 | X | | | | | * | D7 | X | | | | | * --------+----+---+---+---+-...-+-----+ * Page 1 | | | | | | | * --------+----+---+---+---+-...-+-----+ * Page 2 | | | | | | | * --------+----+---+---+---+-...-+-----+ * Page 3 | | | | | | | * --------+----+---+---+---+-...-+-----+ * Page 4 | | | | | | | * --------+----+---+---+---+-...-+-----+ * Page 5 | | | | | | | * --------+----+---+---+---+-...-+-----+ * Page 6 | | | | | | | * --------+----+---+---+---+-...-+-----+ * Page 7 | | | | | | | * --------+----+---+---+---+-...-+-----+ * * ----------------------------------+-------------------------------------- * Landscape Display: | Reverse Landscape Display: * --------+-----------------------+ | -------+---------------------------+ * | Column | | | Column | * --------+---+---+---+-...-+-----+ | -------+-----+-----+-----+-...-+---+ * Page 0 | 0 | 1 | 2 | | 131 | | Page 7 | 131 | 130 | 129 | | 0 | * --------+---+---+---+-...-+-----+ | -------+-----+-----+-----+-...-+---+ * Page 1 | V | | Page 6 | ^ | * --------+---+---+---+-...-+-----+ | -------+-----+-----+-----+-...-+---+ * Page 2 | V | | Page 5 | ^ | * --------+---+---+---+-...-+-----+ | -------+-----+-----+-----+-...-+---+ * Page 3 | V | | Page 4 | ^ | * --------+---+---+---+-...-+-----+ | -------+-----+-----+-----+-...-+---+ * Page 4 | V | | Page 3 | ^ | * --------+---+---+---+-...-+-----+ | -------+-----+-----+-----+-...-+---+ * Page 5 | V | | Page 2 | ^ | * --------+---+---+---+-...-+-----+ | -------+-----+-----+-----+-...-+---+ * Page 6 | V | | Page 1 | ^ | * --------+---+---+---+-...-+-----+ | -------+-----+-----+-----+-...-+---+ * Page 7 | V | | Page 0 | ^ | * --------+---+---+---+-...-+-----+ | -------+-----+-----+-----+-...-+---+ * ----------------------------------+-------------------------------------- * * ----------------------------------+-------------------------------------- * Portrait Display: | Reverse Portrait Display: * -----------+---------------------+| -----------+---------------------+ * | Page || | Page | * -----------+---+---+---+-...-+---+| -----------+---+---+---+-...-+---+ * Column 0 | 0 | 1 | 2 | | 7 || Column 131 | 7 | 6 | 5 | | 0 | * -----------+---+---+---+-...-+---+| -----------+---+---+---+-...-+---+ * Column 1 | > > > > > || Column 130 | | * -----------+---+---+---+-...-+---+| -----------+---+---+---+-...-+---+ * Column 2 | || Column 129 | | * -----------+---+---+---+-...-+---+| -----------+---+---+---+-...-+---+ * ... | || ... | | * -----------+---+---+---+-...-+---+| -----------+---+---+---+-...-+---+ * Column 131 | || Column 0 | < < < < < | * -----------+---+---+---+-...-+---+| -----------+---+---+---+-...-+---+ * ----------------------------------+-------------------------------------- ****************************************************************************/ /**************************************************************************** * Included Files ****************************************************************************/ #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef CONFIG_LCD_UG2864AMBAG01 /**************************************************************************** * Pre-processor Definitions ****************************************************************************/ /* Configuration ************************************************************/ /* Limitations of the current configuration that I hope to fix someday */ #if CONFIG_UG2864AMBAG01_NINTERFACES != 1 # warning "This implementation supports only a single OLED device" # undef CONFIG_UG2864AMBAG01_NINTERFACES # define CONFIG_UG2864AMBAG01_NINTERFACES 1 #endif #if defined(CONFIG_LCD_PORTRAIT) || defined(CONFIG_LCD_RPORTRAIT) # warning "No support yet for portrait modes" # define CONFIG_LCD_LANDSCAPE 1 # undef CONFIG_LCD_PORTRAIT # undef CONFIG_LCD_RLANDSCAPE # undef CONFIG_LCD_RPORTRAIT #endif /* SH1101A Commands *********************************************************/ #define SH1101A_SETCOLL(ad) (0x00 | ((ad) & 0x0f)) /* Set Lower Column Address: (00h - 0fh) */ #define SH1101A_SETCOLH(ad) (0x10 | ((ad) & 0x0f)) /* Set Higher Column Address: (10h - 1fh) */ #define SH1101A_STARTLINE(ln) (0x40 | ((ln) & 0x3f)) /* Set Display Start Line: (40h - 7fh) */ #define SH1101A_CONTRAST_MODE (0x81) /* Set Contrast Control Register: (Double Bytes Command) */ # define SH1101A_CONTRAST(c) (c) #define SH1101A_SEGREMAP(m) (0xa0 | ((m) & 0x01)) /* Set Segment Re-map: (a0h - a1h) */ # define SH1101A_REMAPRIGHT SH1101A_SEGREMAP(0) /* Right rotation */ # define SH1101A_REMAPPLEFT SH1101A_SEGREMAP(1) /* Left rotation */ #define SH1101A_EDISPOFFON(s) (0xa4 | ((s) & 0x01)) /* Set Entire Display OFF/ON: (a4h - a5h) */ # define SH1101A_EDISPOFF SH1101A_EDISPOFFON(0) /* Display off */ # define SH1101A_EDISPON SH1101A_EDISPOFFON(1) /* Display on */ #define SH1101A_NORMREV(s) (0xa6 | ((s) & 0x01)) /* Set Normal/Reverse Display: (a6h -a7h) */ # define SH1101A_NORMAL SH1101A_NORMREV(0) /* Normal display */ # define SH1101A_REVERSE SH1101A_NORMREV(1) /* Reverse display */ #define SH1101A_MRATIO_MODE (0xa8) /* Set Multiplex Ration: (Double Bytes Command) */ # define SH1101A_MRATIO(d) ((d) & 0x3f) #define SH1101A_DCDC_MODE (0xad) /* Set DC-DC OFF/ON: (Double Bytes Command) */ # define SH1101A_DCDC_OFF (0x8a) # define SH1101A_DCDC_ON (0x8b) #define SH1101A_DISPOFFON(s) (0xae | ((s) & 0x01)) /* Display OFF/ON: (aeh - afh) */ # define SH1101A_DISPOFF SH1101A_DISPOFFON(0) /* Display off */ # define SH1101A_DISPON SH1101A_DISPOFFON(1) /* Display on */ #define SH1101A_PAGEADDR(a) (0xb0 | ((a) & 0x0f)) /* Set Page Address: (b0h - b7h) */ #define SH1101A_SCANDIR(d) (0xc0 | ((d) & 0x08)) /* Set Common Output Scan Direction: (c0h - c8h) */ # define SH1101A_SCANFROMCOM0 SH1101A_SCANDIR(0x00) /* Scan from COM[0] to COM[n-1]*/ # define SH1101A_SCANTOCOM0 SH1101A_SCANDIR(0x08) /* Scan from COM[n-1] to COM[0] */ #define SH1101A_DISPOFFS_MODE (0xd3) /* Set Display Offset: (Double Bytes Command) */ # define SH1101A_DISPOFFS(o) ((o) & 0x3f) #define SH1101A_CLKDIV_SET (0xd5) /* Set Display Clock Divide Ratio/Oscillator Frequency: (Double Bytes Command) */ # define SH1101A_CLKDIV(f,d) ((((f) & 0x0f) << 4) | ((d) & 0x0f)) #define SH1101A_CHRGPER_SET (0xd9) /* Set Dis-charge/Pre-charge Period: (Double Bytes Command) */ # define SH1101A_CHRGPER(d,p) ((((d) & 0x0f) << 4) | ((p) & 0x0f)) #define SH1101A_CMNPAD_CONFIG (0xda) /* Set Common pads hardware configuration: (Double Bytes Command) */ #define SH1101A_CMNPAD(c) ((0x02) | ((c) & 0x10)) #define SH1101A_VCOM_SET (0xdb) /* Set VCOM Deselect Level: (Double Bytes Command) */ # define SH1101A_VCOM(v) (v) #define SH1101A_RMWSTART (0xe0) /* Read-Modify-Write: (e0h) */ #define SH1101A_NOP (0xe3) /* NOP: (e3h) */ #define SH1101A_END (0xee) /* End: (eeh) */ #define SH1101A_WRDATA(d) (d) /* Write Display Data */ #define SH1101A_STATUS_BUSY (0x80) /* Read Status */ #define SH1101A_STATUS_ONOFF (0x40) #define SH1101A_RDDATA(d) (d) /* Read Display Data */ /* Color Properties *********************************************************/ /* Display Resolution * * The SH1101A display controller can handle a resolution of 132x64. * The UG-2864AMBAG01 on the base board is 128x64. */ #define UG2864AMBAG01_DEV_XRES 128 /* Only 128 of 131 columns used */ #define UG2864AMBAG01_DEV_YRES 64 /* 8 pages each 8 rows */ #define UG2864AMBAG01_DEV_XOFFSET 2 /* Offset to logical column 0 */ #define UG2864AMBAG01_DEV_PAGES 8 /* 8 pages */ #if defined(CONFIG_LCD_LANDSCAPE) || defined(CONFIG_LCD_RLANDSCAPE) # define UG2864AMBAG01_XRES UG2864AMBAG01_DEV_XRES # define UG2864AMBAG01_YRES UG2864AMBAG01_DEV_YRES #else # define UG2864AMBAG01_XRES UG2864AMBAG01_DEV_YRES # define UG2864AMBAG01_YRES UG2864AMBAG01_DEV_XRES #endif /* Color depth and format */ #define UG2864AMBAG01_BPP 1 #define UG2864AMBAG01_COLORFMT FB_FMT_Y1 /* Bytes per logical row and actual device row */ #define UG2864AMBAG01_XSTRIDE (UG2864AMBAG01_XRES >> 3) #define UG2864AMBAG01_YSTRIDE (UG2864AMBAG01_YRES >> 3) /* Default contrast */ #define UG2864AMBAG01_CONTRAST (128) /* The size of the shadow frame buffer or one row buffer. * * Frame buffer size: 128 columns x 64 rows / 8 bits-per-pixel * Row size: 128 columns x 8 rows-per-page / 8 bits-per-pixel */ #define UG2864AMBAG01_FBSIZE (UG2864AMBAG01_XSTRIDE * UG2864AMBAG01_YRES) #define UG2864AMBAG01_ROWSIZE (UG2864AMBAG01_XSTRIDE) /* Orientation */ #if defined(CONFIG_LCD_LANDSCAPE) # undef UG2864AMBAG01_DEV_REVERSEX # undef UG2864AMBAG01_DEV_REVERSEY #elif defined(CONFIG_LCD_RLANDSCAPE) # define UG2864AMBAG01_DEV_REVERSEX 1 # define UG2864AMBAG01_DEV_REVERSEY 1 #endif /* Bit helpers */ #define LS_BIT (1 << 0) #define MS_BIT (1 << 7) /**************************************************************************** * Private Type Definition ****************************************************************************/ /* This structure describes the state of this driver */ struct ug2864ambag01_dev_s { struct lcd_dev_s dev; /* Publicly visible device structure */ /* Private LCD-specific information follows */ FAR struct spi_dev_s *spi; /* Cached SPI device reference */ uint8_t contrast; /* Current contrast setting */ bool on; /* true: display is on */ /* The SH1101A does not support reading from the display memory in SPI * mode. Since there is 1 BPP and access is byte-by-byte, it is necessary * to keep a shadow copy of the framebuffer memory. At 128x64, this amounts * to 1KB. */ uint8_t fb[UG2864AMBAG01_FBSIZE]; }; /**************************************************************************** * Private Function Protototypes ****************************************************************************/ /* Low-level SPI helpers */ static void ug2864ambag01_lock(FAR struct spi_dev_s *spi); static void ug2864ambag01_unlock(FAR struct spi_dev_s *spi); /* LCD Data Transfer Methods */ static int ug2864ambag01_putrun(FAR struct lcd_dev_s *dev, fb_coord_t row, fb_coord_t col, FAR const uint8_t *buffer, size_t npixels); static int ug2864ambag01_getrun(FAR struct lcd_dev_s *dev, fb_coord_t row, fb_coord_t col, FAR uint8_t *buffer, size_t npixels); /* LCD Configuration */ static int ug2864ambag01_getvideoinfo(FAR struct lcd_dev_s *dev, FAR struct fb_videoinfo_s *vinfo); static int ug2864ambag01_getplaneinfo(FAR struct lcd_dev_s *dev, unsigned int planeno, FAR struct lcd_planeinfo_s *pinfo); /* LCD RGB Mapping */ #ifdef CONFIG_FB_CMAP # error "RGB color mapping not supported by this driver" #endif /* Cursor Controls */ #ifdef CONFIG_FB_HWCURSOR # error "Cursor control not supported by this driver" #endif /* LCD Specific Controls */ static int ug2864ambag01_getpower(struct lcd_dev_s *dev); static int ug2864ambag01_setpower(struct lcd_dev_s *dev, int power); static int ug2864ambag01_getcontrast(struct lcd_dev_s *dev); static int ug2864ambag01_setcontrast(struct lcd_dev_s *dev, unsigned int contrast); /**************************************************************************** * Private Data ****************************************************************************/ /* This is working memory allocated by the LCD driver for each LCD device * and for each color plane. This memory will hold one raster line of data. * The size of the allocated run buffer must therefore be at least * (bpp * xres / 8). Actual alignment of the buffer must conform to the * bitwidth of the underlying pixel type. * * If there are multiple planes, they may share the same working buffer * because different planes will not be operate on concurrently. However, * if there are multiple LCD devices, they must each have unique run buffers. */ static uint8_t g_runbuffer[UG2864AMBAG01_ROWSIZE]; /* This structure describes the overall LCD video controller */ static const struct fb_videoinfo_s g_videoinfo = { .fmt = UG2864AMBAG01_COLORFMT, /* Color format: RGB16-565: RRRR RGGG GGGB BBBB */ .xres = UG2864AMBAG01_XRES, /* Horizontal resolution in pixel columns */ .yres = UG2864AMBAG01_YRES, /* Vertical resolution in pixel rows */ .nplanes = 1, /* Number of color planes supported */ }; /* This is the standard, NuttX Plane information object */ static const struct lcd_planeinfo_s g_planeinfo = { .putrun = ug2864ambag01_putrun, /* Put a run into LCD memory */ .getrun = ug2864ambag01_getrun, /* Get a run from LCD memory */ .buffer = (FAR uint8_t *)g_runbuffer, /* Run scratch buffer */ .bpp = UG2864AMBAG01_BPP, /* Bits-per-pixel */ }; /* This is the OLED driver instance * (only a single device is supported for now) */ static struct ug2864ambag01_dev_s g_oleddev = { .dev = { /* LCD Configuration */ .getvideoinfo = ug2864ambag01_getvideoinfo, .getplaneinfo = ug2864ambag01_getplaneinfo, /* LCD RGB Mapping -- Not supported */ /* Cursor Controls -- Not supported */ /* LCD Specific Controls */ .getpower = ug2864ambag01_getpower, .setpower = ug2864ambag01_setpower, .getcontrast = ug2864ambag01_getcontrast, .setcontrast = ug2864ambag01_setcontrast, }, }; /**************************************************************************** * Private Functions ****************************************************************************/ /**************************************************************************** * Name: ug2864ambag01_lock * * Description: * Select the SPI, locking and re-configuring if necessary * * Input Parameters: * spi - Reference to the SPI driver structure * * Returned Value: * None * * Assumptions: * ****************************************************************************/ static inline void ug2864ambag01_lock(FAR struct spi_dev_s *spi) { /* Lock the SPI bus if there are multiple devices competing for the SPI * bus. */ SPI_LOCK(spi, true); /* Now make sure that the SPI bus is configured for the UG-2864AMBAG01 (it * might have gotten configured for a different device while unlocked) */ SPI_SETMODE(spi, CONFIG_UG2864AMBAG01_SPIMODE); SPI_SETBITS(spi, 8); SPI_HWFEATURES(spi, 0); SPI_SETFREQUENCY(spi, CONFIG_UG2864AMBAG01_FREQUENCY); } /**************************************************************************** * Name: ug2864ambag01_unlock * * Description: * De-select the SPI * * Input Parameters: * spi - Reference to the SPI driver structure * * Returned Value: * None * * Assumptions: * ****************************************************************************/ static inline void ug2864ambag01_unlock(FAR struct spi_dev_s *spi) { /* De-select UG-2864AMBAG01 chip and relinquish the SPI bus. */ SPI_LOCK(spi, false); } /**************************************************************************** * Name: ug2864ambag01_putrun * * Description: * This method can be used to write a partial raster line to the LCD. * * Input Parameters: * dev - The lcd device * row - Starting row to write to (range: 0 <= row < yres) * col - Starting column to write to (range: 0 <= col <= xres-npixels) * buffer - The buffer containing the run to be written to the LCD * npixels - The number of pixels to write to the LCD * (range: 0 < npixels <= xres-col) * ****************************************************************************/ #if defined(CONFIG_LCD_LANDSCAPE) || defined(CONFIG_LCD_RLANDSCAPE) static int ug2864ambag01_putrun(FAR struct lcd_dev_s *dev, fb_coord_t row, fb_coord_t col, FAR const uint8_t *buffer, size_t npixels) { FAR struct ug2864ambag01_dev_s *priv = (FAR struct ug2864ambag01_dev_s *) dev; FAR uint8_t *fbptr; FAR uint8_t *ptr; uint8_t devcol; uint8_t fbmask; uint8_t page; uint8_t usrmask; int pixlen; uint8_t i; lcdinfo("row: %d col: %d npixels: %d\n", row, col, npixels); DEBUGASSERT(buffer); /* Clip the run to the display */ pixlen = npixels; if ((unsigned int)col + (unsigned int)pixlen > (unsigned int)UG2864AMBAG01_XRES) { pixlen = (int)UG2864AMBAG01_XRES - (int)col; } /* Verify that some portion of the run remains on the display */ if (pixlen <= 0 || row > UG2864AMBAG01_YRES) { return OK; } /* Perform coordinate conversion for reverse landscape mode. * If the rows are reversed then rows are are a mirror reflection of * top to bottom. */ #ifdef UG2864AMBAG01_DEV_REVERSEY row = (UG2864AMBAG01_DEV_YRES - 1) - row; #endif /* If the column is switched then the start of the run is the mirror of * the end of the run. * * col+pixlen-1 * col | * 0 | | XRES * . S>>>>>>E . * . E<<<<<> 3; /* Update the shadow frame buffer memory. First determine the pixel * position in the frame buffer memory. Pixels are organized like * this: * * --------+---+---+---+---+-...-+-----+ * Segment | 0 | 1 | 2 | 3 | ... | 131 | * --------+---+---+---+---+-...-+-----+ * D0 | | X | | | | | * D1 | | X | | | | | * D2 | | X | | | | | * D3 | | X | | | | | * D4 | | X | | | | | * D5 | | X | | | | | * D6 | | X | | | | | * D7 | | X | | | | | * --------+---+---+---+---+-...-+-----+ * * So, in order to draw a white, horizontal line, at row 45. we * would have to modify all of the bytes in page 45/8 = 5. We * would have to set bit 45%8 = 5 in every byte in the page. */ fbmask = 1 << (row & 7); fbptr = &priv->fb[page * UG2864AMBAG01_XRES + col]; #ifdef UG2864AMBAG01_DEV_REVERSEX ptr = fbptr + (pixlen - 1); #else ptr = fbptr; #endif #ifdef CONFIG_LCD_PACKEDMSFIRST usrmask = MS_BIT; #else usrmask = LS_BIT; #endif for (i = 0; i < pixlen; i++) { /* Set or clear the corresponding bit */ #ifdef UG2864AMBAG01_DEV_REVERSEX if ((*buffer & usrmask) != 0) { *ptr-- |= fbmask; } else { *ptr-- &= ~fbmask; } #else if ((*buffer & usrmask) != 0) { *ptr++ |= fbmask; } else { *ptr++ &= ~fbmask; } #endif /* Inc/Decrement to the next source pixel */ #ifdef CONFIG_LCD_PACKEDMSFIRST if (usrmask == LS_BIT) { buffer++; usrmask = MS_BIT; } else { usrmask >>= 1; } #else if (usrmask == MS_BIT) { buffer++; usrmask = LS_BIT; } else { usrmask <<= 1; } #endif } /* Offset the column position to account for smaller horizontal * display range. */ devcol = col + UG2864AMBAG01_DEV_XOFFSET; /* Lock and select device */ ug2864ambag01_lock(priv->spi); SPI_SELECT(priv->spi, SPIDEV_DISPLAY(0), true); /* Select command transfer */ SPI_CMDDATA(priv->spi, SPIDEV_DISPLAY(0), true); /* Set the starting position for the run */ /* Set the column address to the XOFFSET value */ SPI_SEND(priv->spi, SH1101A_SETCOLL(devcol & 0x0f)); SPI_SEND(priv->spi, SH1101A_SETCOLH(devcol >> 4)); /* Set the page address */ SPI_SEND(priv->spi, SH1101A_PAGEADDR(page)); /* Select data transfer */ SPI_CMDDATA(priv->spi, SPIDEV_DISPLAY(0), false); /* Then transfer all of the data */ SPI_SNDBLOCK(priv->spi, fbptr, pixlen); /* De-select and unlock the device */ SPI_SELECT(priv->spi, SPIDEV_DISPLAY(0), false); ug2864ambag01_unlock(priv->spi); return OK; } #else # error "Configuration not implemented" #endif /**************************************************************************** * Name: ug2864ambag01_getrun * * Description: * This method can be used to read a partial raster line from the LCD. * * Description: * This method can be used to write a partial raster line to the LCD. * * dev - The lcd device * row - Starting row to read from (range: 0 <= row < yres) * col - Starting column to read read (range: 0 <= col <= xres-npixels) * buffer - The buffer in which to return the run read from the LCD * npixels - The number of pixels to read from the LCD * (range: 0 < npixels <= xres-col) * ****************************************************************************/ #if defined(CONFIG_LCD_LANDSCAPE) || defined(CONFIG_LCD_RLANDSCAPE) static int ug2864ambag01_getrun(FAR struct lcd_dev_s *dev, fb_coord_t row, fb_coord_t col, FAR uint8_t *buffer, size_t npixels) { FAR struct ug2864ambag01_dev_s *priv = (FAR struct ug2864ambag01_dev_s *) dev; FAR uint8_t *fbptr; uint8_t page; uint8_t fbmask; uint8_t usrmask; int pixlen; uint8_t i; lcdinfo("row: %d col: %d npixels: %d\n", row, col, npixels); DEBUGASSERT(buffer); /* Clip the run to the display */ pixlen = npixels; if ((unsigned int)col + (unsigned int)pixlen > (unsigned int)UG2864AMBAG01_XRES) { pixlen = (int)UG2864AMBAG01_XRES - (int)col; } /* Verify that some portion of the run is actually the display */ if (pixlen <= 0 || row > UG2864AMBAG01_YRES) { return -EINVAL; } /* Perform coordinate conversion for reverse landscape mode. * If the rows are reversed then rows are are a mirror reflection of * top to bottom. */ #ifdef UG2864AMBAG01_DEV_REVERSEY row = (UG2864AMBAG01_DEV_YRES - 1) - row; #endif /* If the column is switched then the start of the run is the mirror of * the end of the run. * * col+pixlen-1 * col | * 0 | | XRES * . S>>>>>>E . * . E<<<<<> 3; /* Update the shadow frame buffer memory. First determine the pixel * position in the frame buffer memory. Pixels are organized like * this: * * --------+---+---+---+---+-...-+-----+ * Segment | 0 | 1 | 2 | 3 | ... | 131 | * --------+---+---+---+---+-...-+-----+ * D0 | | X | | | | | * D1 | | X | | | | | * D2 | | X | | | | | * D3 | | X | | | | | * D4 | | X | | | | | * D5 | | X | | | | | * D6 | | X | | | | | * D7 | | X | | | | | * --------+---+---+---+---+-...-+-----+ * * So, in order to draw a white, horizontal line, at row 45. we * would have to modify all of the bytes in page 45/8 = 5. We * would have to set bit 45%8 = 5 in every byte in the page. */ fbmask = 1 << (row & 7); fbptr = &priv->fb[page * UG2864AMBAG01_XRES + col]; #ifdef CONFIG_LCD_PACKEDMSFIRST usrmask = MS_BIT; #else usrmask = LS_BIT; #endif *buffer = 0; for (i = 0; i < pixlen; i++) { /* Set or clear the corresponding bit */ #ifdef UG2864AMBAG01_DEV_REVERSEX uint8_t byte = *fbptr--; #else uint8_t byte = *fbptr++; #endif if ((byte & fbmask) != 0) { *buffer |= usrmask; } /* Inc/Decrement to the next destination pixel. Hmmmm. It looks like * this logic could write past the end of the user buffer. Revisit * this! */ #ifdef CONFIG_LCD_PACKEDMSFIRST if (usrmask == LS_BIT) { buffer++; *buffer = 0; usrmask = MS_BIT; } else { usrmask >>= 1; } #else if (usrmask == MS_BIT) { buffer++; *buffer = 0; usrmask = LS_BIT; } else { usrmask <<= 1; } #endif } return OK; } #else # error "Configuration not implemented" #endif /**************************************************************************** * Name: ug2864ambag01_getvideoinfo * * Description: * Get information about the LCD video controller configuration. * ****************************************************************************/ static int ug2864ambag01_getvideoinfo(FAR struct lcd_dev_s *dev, FAR struct fb_videoinfo_s *vinfo) { DEBUGASSERT(dev && vinfo); lcdinfo("fmt: %d xres: %d yres: %d nplanes: %d\n", g_videoinfo.fmt, g_videoinfo.xres, g_videoinfo.yres, g_videoinfo.nplanes); memcpy(vinfo, &g_videoinfo, sizeof(struct fb_videoinfo_s)); return OK; } /**************************************************************************** * Name: ug2864ambag01_getplaneinfo * * Description: * Get information about the configuration of each LCD color plane. * ****************************************************************************/ static int ug2864ambag01_getplaneinfo(FAR struct lcd_dev_s *dev, unsigned int planeno, FAR struct lcd_planeinfo_s *pinfo) { DEBUGASSERT(pinfo && planeno == 0); lcdinfo("planeno: %d bpp: %d\n", planeno, g_planeinfo.bpp); memcpy(pinfo, &g_planeinfo, sizeof(struct lcd_planeinfo_s)); pinfo->dev = dev; return OK; } /**************************************************************************** * Name: ug2864ambag01_getpower * * Description: * Get the LCD panel power status * (0: full off - CONFIG_LCD_MAXPOWER: full on.) * On backlit LCDs, this setting may correspond to the backlight setting. * ****************************************************************************/ static int ug2864ambag01_getpower(FAR struct lcd_dev_s *dev) { FAR struct ug2864ambag01_dev_s *priv = (FAR struct ug2864ambag01_dev_s *)dev; DEBUGASSERT(priv); lcdinfo("power: %s\n", priv->on ? "ON" : "OFF"); return priv->on ? CONFIG_LCD_MAXPOWER : 0; } /**************************************************************************** * Name: ug2864ambag01_setpower * * Description: * Enable/disable LCD panel power * (0: full off - CONFIG_LCD_MAXPOWER: full on). On * backlit LCDs, this setting may correspond to the backlight setting. * ****************************************************************************/ static int ug2864ambag01_setpower(struct lcd_dev_s *dev, int power) { struct ug2864ambag01_dev_s *priv = (struct ug2864ambag01_dev_s *)dev; DEBUGASSERT(priv && (unsigned)power <= CONFIG_LCD_MAXPOWER && priv->spi); lcdinfo("power: %d [%d]\n", power, priv->on ? CONFIG_LCD_MAXPOWER : 0); /* Lock and select device */ ug2864ambag01_lock(priv->spi); SPI_SELECT(priv->spi, SPIDEV_DISPLAY(0), true); if (power <= 0) { /* Turn the display off */ SPI_SEND(priv->spi, SH1101A_DISPOFF); priv->on = false; } else { /* Turn the display on */ SPI_SEND(priv->spi, SH1101A_DISPON); priv->on = true; } /* De-select and unlock the device */ SPI_SELECT(priv->spi, SPIDEV_DISPLAY(0), false); ug2864ambag01_unlock(priv->spi); return OK; } /**************************************************************************** * Name: ug2864ambag01_getcontrast * * Description: * Get the current contrast setting (0-CONFIG_LCD_MAXCONTRAST). * ****************************************************************************/ static int ug2864ambag01_getcontrast(struct lcd_dev_s *dev) { struct ug2864ambag01_dev_s *priv = (struct ug2864ambag01_dev_s *)dev; DEBUGASSERT(priv); lcdinfo("contrast: %d\n", priv->contrast); return priv->contrast; } /**************************************************************************** * Name: ug2864ambag01_setcontrast * * Description: * Set LCD panel contrast (0-CONFIG_LCD_MAXCONTRAST). * ****************************************************************************/ static int ug2864ambag01_setcontrast(struct lcd_dev_s *dev, unsigned int contrast) { struct ug2864ambag01_dev_s *priv = (struct ug2864ambag01_dev_s *)dev; unsigned int scaled; lcdinfo("contrast: %d\n", contrast); DEBUGASSERT(priv); /* Verify the contrast value */ #ifdef CONFIG_DEBUG_FEATURES if (contrast > CONFIG_LCD_MAXCONTRAST) { return -EINVAL; } #endif /* Scale contrast: newcontrast = 255 * contrast / CONFIG_LCD_MAXCONTRAST * Where contrast is in the range {1,255} */ #if CONFIG_LCD_MAXCONTRAST != 255 scaled = ((contrast << 8) - 1) / CONFIG_LCD_MAXCONTRAST; #else scaled = contrast; #endif /* Lock and select device */ ug2864ambag01_lock(priv->spi); SPI_SELECT(priv->spi, SPIDEV_DISPLAY(0), true); /* Select command transfer */ SPI_CMDDATA(priv->spi, SPIDEV_DISPLAY(0), true); /* Set the contrast */ SPI_SEND(priv->spi, SH1101A_CONTRAST_MODE); /* Set contrast control register */ SPI_SEND(priv->spi, SH1101A_CONTRAST(scaled)); /* Data 1: Set 1 of 256 contrast steps */ priv->contrast = contrast; /* De-select and unlock the device */ SPI_SELECT(priv->spi, SPIDEV_DISPLAY(0), false); ug2864ambag01_unlock(priv->spi); return OK; } /**************************************************************************** * Public Functions ****************************************************************************/ /**************************************************************************** * Name: ug2864ambag01_initialize * * Description: * Initialize the UG-2864AMBAG01 video hardware. The initial state of the * OLED is fully initialized, display memory cleared, and the OLED ready * to use, but with the power setting at 0 (full off == sleep mode). * * Input Parameters: * * spi - A reference to the SPI driver instance. * devno - A value in the range of 0 through * CONFIG_UG2864AMBAG01_NINTERFACES-1. * This allows support for multiple OLED devices. * * Returned Value: * * On success, this function returns a reference to the LCD object for * the specified OLED. NULL is returned on any failure. * ****************************************************************************/ FAR struct lcd_dev_s *ug2864ambag01_initialize(FAR struct spi_dev_s *spi, unsigned int devno) { FAR struct ug2864ambag01_dev_s *priv = &g_oleddev; lcdinfo("Initializing\n"); DEBUGASSERT(spi && devno == 0); /* Save the reference to the SPI device */ priv->spi = spi; /* Lock and select device */ ug2864ambag01_lock(priv->spi); SPI_SELECT(spi, SPIDEV_DISPLAY(0), true); /* Select command transfer */ SPI_CMDDATA(spi, SPIDEV_DISPLAY(0), true); /* Configure the device */ SPI_SEND(spi, SH1101A_DISPOFF); /* Display off */ SPI_SEND(spi, SH1101A_SETCOLL(0)); /* Set lower column address */ SPI_SEND(spi, SH1101A_SETCOLH(0)); /* Set higher column address */ SPI_SEND(spi, SH1101A_STARTLINE(0)); /* Set display start line */ SPI_SEND(spi, SH1101A_PAGEADDR(0)); /* Set page address */ SPI_SEND(spi, SH1101A_CONTRAST_MODE); /* Contrast control */ SPI_SEND(spi, UG2864AMBAG01_CONTRAST); /* Default contrast */ SPI_SEND(spi, SH1101A_REMAPPLEFT); /* Set segment remap left */ SPI_SEND(spi, SH1101A_EDISPOFF); /* Normal display */ SPI_SEND(spi, SH1101A_NORMAL); /* Normal (un-reversed) display mode */ SPI_SEND(spi, SH1101A_MRATIO_MODE); /* Multiplex ratio */ SPI_SEND(spi, SH1101A_MRATIO(0x3f)); /* Duty = 1/64 */ SPI_SEND(spi, SH1101A_SCANTOCOM0); /* Com scan direction: Scan from COM[n-1] to COM[0] */ SPI_SEND(spi, SH1101A_DISPOFFS_MODE); /* Set display offset */ SPI_SEND(spi, SH1101A_DISPOFFS(0)); SPI_SEND(spi, SH1101A_CLKDIV_SET); /* Set clock divider */ SPI_SEND(spi, SH1101A_CLKDIV(0, 0)); SPI_SEND(spi, SH1101A_CMNPAD_CONFIG); /* Set common pads */ SPI_SEND(spi, SH1101A_CMNPAD(0x10)); SPI_SEND(spi, SH1101A_VCOM_SET); SPI_SEND(spi, SH1101A_VCOM(0x40)); SPI_SEND(spi, SH1101A_DCDC_MODE); /* DC/DC control mode: on */ SPI_SEND(spi, SH1101A_DCDC_ON); SPI_SEND(spi, SH1101A_DISPON); /* display ON */ /* De-select and unlock the device */ SPI_SELECT(spi, SPIDEV_DISPLAY(0), false); ug2864ambag01_unlock(priv->spi); /* Clear the display */ up_mdelay(100); ug2864ambag01_fill(&priv->dev, UG_Y1_BLACK); return &priv->dev; } /**************************************************************************** * Name: ug2864ambag01_fill * * Description: * This non-standard method can be used to clear the entire display by * writing one color to the display. * This is much faster than writing a series of runs. * * Input Parameters: * priv - Reference to private driver structure * * Assumptions: * Caller has selected the OLED section. * ****************************************************************************/ void ug2864ambag01_fill(FAR struct lcd_dev_s *dev, uint8_t color) { FAR struct ug2864ambag01_dev_s *priv = &g_oleddev; unsigned int page; /* Make an 8-bit version of the selected color */ if (color & 1) { color = 0xff; } else { color = 0; } /* Initialize the framebuffer */ memset(priv->fb, color, UG2864AMBAG01_FBSIZE); /* Lock and select device */ ug2864ambag01_lock(priv->spi); SPI_SELECT(priv->spi, SPIDEV_DISPLAY(0), true); /* Visit each page */ for (page = 0; page < UG2864AMBAG01_DEV_PAGES; page++) { /* Select command transfer */ SPI_CMDDATA(priv->spi, SPIDEV_DISPLAY(0), true); /* Set the column address to the XOFFSET value */ SPI_SEND(priv->spi, SH1101A_SETCOLL(UG2864AMBAG01_DEV_XOFFSET)); SPI_SEND(priv->spi, SH1101A_SETCOLH(0)); /* Set the page address */ SPI_SEND(priv->spi, SH1101A_PAGEADDR(page)); /* Select data transfer */ SPI_CMDDATA(priv->spi, SPIDEV_DISPLAY(0), false); /* Transfer one page of the selected color */ SPI_SNDBLOCK(priv->spi, &priv->fb[page * UG2864AMBAG01_XRES], UG2864AMBAG01_XRES); } /* De-select and unlock the device */ SPI_SELECT(priv->spi, SPIDEV_DISPLAY(0), false); ug2864ambag01_unlock(priv->spi); } #endif /* CONFIG_LCD_UG2864AMBAG01 */