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drivers/lcd: Minor updates to FT80x initialization.

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This commit is contained in:
Gregory Nutt 2018-02-18 11:04:29 -06:00
parent eb3663721e
commit be73c65b64
2 changed files with 75 additions and 18 deletions
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74
drivers/lcd/ft80x.c
View file

@ -78,12 +78,14 @@
* Pre-processor Definitions
****************************************************************************/
#define CHIPID 0x7c
#define ROMID_MASK 0x0000ffff
#if defined(CONFIG_LCD_FT800)
# define DEVNAME "/dev/ft800"
# define ROMID 0x01000800
# define DEVNAME "/dev/ft800"
# define ROMID 0x00000800
#elif defined(CONFIG_LCD_FT801)
# define DEVNAME "/dev/ft801"
# define ROMID 0x01000801
# define DEVNAME "/dev/ft801"
# define ROMID 0x00000801
#else
# error No FT80x device configured
#endif
@ -800,6 +802,7 @@ static int ft80x_unlink(FAR struct inode *inode)
static int ft80x_initialize(FAR struct ft80x_dev_s *priv)
{
uint32_t timeout;
uint8_t regval32;
uint8_t regval8;
@ -874,23 +877,39 @@ static int ft80x_initialize(FAR struct ft80x_dev_s *priv)
/* 2. Send Host command CLKEXT to FT800
* 3. Send Host command ACTIVE to enable clock to FT800.
*
* PLL output should default to 48MHz.
*/
ft80x_host_command(priv, FT80X_CMD_CLKEXT);
ft80x_host_command(priv, FT80X_CMD_ACTIVE);
/* Verify the chip ID */
/* Verify the chip ID. Read repeatedly until FT80x is ready. */
regval32 = ft80x_read_word(priv, FT80X_REG_ID);
if ((regval32 & ID_MASK) != 0x7c)
timeout = 0;
for (; ; )
{
lcderr("ERROR: Bad chip ID: %02x\n",
(unsigned int)(regval32 & ID_MASK));
return -ENODEV;
/* Read the Chip ID */
regval8 = ft80x_read_byte(priv, FT80X_REG_ID);
if (regval8 == CHIPID)
{
/* Chip ID verify so FT80x is ready */
break;
}
/* Initial Chip ID read may fail because the chip is not yet ready. */
if (++timeout > 100000)
{
lcderr("ERROR: Bad chip ID: %02x\n", regval8);
return -ENODEV;
}
}
regval32 = ft80x_read_word(priv, FT80X_ROM_CHIPID);
if (regval32 != ROMID)
if ((regval32 & ROMID_MASK) != ROMID)
{
lcderr("ERROR: Bad ROM chip ID: %08lx\n", (unsigned long)regval32);
return -ENODEV;
@ -907,8 +926,8 @@ static int ft80x_initialize(FAR struct ft80x_dev_s *priv)
* b. Set the following registers with values for the chosen display.
* Typical WQVGA and QVGA values are shown:
*
* Register Description WQVGA QVGA 320 x 240
* 480x272 320x240
* Register Description WQVGA QVGA
* 480x272 320x240
* FT80X_REG_PCLK_POL Pixel Clock Polarity 1 0
* FT80X_REG_HSIZE Image width in pixels 480 320
* FT80X_REG_HCYCLE Total number of clocks per line 548 408
@ -958,7 +977,7 @@ static int ft80x_initialize(FAR struct ft80x_dev_s *priv)
ft80x_write_hword(priv, FT80X_REG_VOFFSET, 13);
ft80x_write_hword(priv, FT80X_REG_VSYNC0, 0);
ft80x_write_hword(priv, FT80X_REG_VSYNC1, 2);
ft80x_write_byte(priv, FT80X_REG_SWIZZLE, 0); /* REVISIT */
ft80x_write_byte(priv, FT80X_REG_SWIZZLE, 2);
ft80x_write_byte(priv, FT80X_REG_PCLK_POL, 0);
ft80x_write_byte(priv, FT80X_REG_CSPREAD, 1);
ft80x_write_hword(priv, FT80X_REG_HSIZE, 320);
@ -998,19 +1017,42 @@ static int ft80x_initialize(FAR struct ft80x_dev_s *priv)
/* 8. Write FT80X_REG_PCLK, video output begins with the first display list */
#if defined(CONFIG_LCD_FT80X_WQVGA)
ft80x_write_byte(priv, FT80X_REG_PCLK, 5);
#elif defined(CONFIG_LCD_FT80X_QVGA)
ft80x_write_byte(priv, FT80X_REG_PCLK, 8);
#else
# error Unknown display size
#endif
/* 9. Use MCU SPI clock not more than 30MHz */
DEBUGASSERT(priv->lower->op_frequency <= 30000000);
priv->frequency = priv->lower->op_frequency;
/* Configure touch threshold.
* REVISIT: For FT800 set REG_TOUCH_RZTHRESH to 1200.
*/
#if defined(CONFIG_LCD_FT800)
/* Configure the REG_TOUCH_RZTHRESH the value 1200 may need to be tweaked
* for your application.
*/
ft80x_write_hword(priv, FT80X_REG_TOUCH_RZTHRESH, 1200);
#elif defined(CONFIG_LCD_FT801)
# warning Missing logic
#else
# error No FT80x device configured
#endif
return OK;
}
/**************************************************************************************
/****************************************************************************
* Public Functions
**************************************************************************************/
****************************************************************************/
/****************************************************************************
* Name: ft80x_register

19
include/nuttx/lcd/ft80x.h
View file

@ -53,6 +53,7 @@
****************************************************************************/
#include <nuttx/config.h>
#include <nuttx/irq.h>
#include <nuttx/spi/spi.h>
#include <nuttx/i2c/i2c_master.h>
#include <nuttx/lcd/lcd_ioctl.h>
@ -62,13 +63,23 @@
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/* Configuration */
/* Configuration ************************************************************/
#ifdef CONFIG_DISABLE_SIGNALS
# error Signal support is required by this driver
#endif
/* FT80x IOCTL commands:
#if defined(CONFIG_LCD_FT80X_WQVGA)
# define FT80X_DISPLAY_WIDTH 480
# define FT80X_DISPLAY_HEIGHT 272
#elif defined(CONFIG_LCD_FT80X_QVGA)
# define FT80X_DISPLAY_WIDTH 320
# define FT80X_DISPLAY_HEIGHT 240
#else
# error Unknown display size
#endif
/* FT80x IOCTL commands *****************************************************
*
* FT80X_IOC_CREATEDL:
* Description: Write a display list to the FT80x display list memory
@ -144,6 +155,7 @@
#define FT80X_IOC_GETTRACKER _LCDIOC(FT80X_NIOCTL_BASE + 3)
#define FT80X_IOC_EVENTNOTIFY _LCDIOC(FT80X_NIOCTL_BASE + 4)
/* FT80x Display List Commands **********************************************/
/* Host commands. 3 word commands. The first word begins with 0b01, the next two are zero */
#define FT80X_CMD_ACTIVE 0x00 /* Switch from Standby/Sleep modes to active mode */
@ -466,6 +478,7 @@
* Public Types
****************************************************************************/
/* FT80x Lower Half Interface Definitions ***********************************/
/* Pins relevant to software control. The FT80X is a 48-pin part. Most of
* the pins are associated with the TFT panel and other board-related
* support. A few a relevant to software control of the part. Those are
@ -524,6 +537,7 @@ struct ft80x_config_s
#endif
};
/* FT80x Display List Command Structures ************************************/
/* This structure describes one generic display list command */
struct ft80x_dlcmd_s
@ -1034,6 +1048,7 @@ struct ft80x_cmd_translate_s
int32_t ty; /* 8: Y translate factor (b16) (input) */
};
/* FT80x IOCTL Argument Structures ******************************************/
/* This container structure is used by FT80X_IOC_CREATEDL and FT80X_IOC_APPENDDL. It
* and defines the list of display commands to be written into display list memory.
*/