diff options
Diffstat (limited to 'nuttx/configs/shenzhou/src/up_ssd1289.c')
| -rw-r--r-- | nuttx/configs/shenzhou/src/up_ssd1289.c | 184 |
1 files changed, 133 insertions, 51 deletions
diff --git a/nuttx/configs/shenzhou/src/up_ssd1289.c b/nuttx/configs/shenzhou/src/up_ssd1289.c index 2b48c78ca..cf02b36d1 100644 --- a/nuttx/configs/shenzhou/src/up_ssd1289.c +++ b/nuttx/configs/shenzhou/src/up_ssd1289.c @@ -76,6 +76,7 @@ # undef CONFIG_DEBUG_VERBOSE # undef CONFIG_DEBUG_GRAPHICS # undef CONFIG_DEBUG_LCD +# undef CONFIG_LCD_REGDEBUG #endif #ifndef CONFIG_DEBUG_VERBOSE @@ -100,14 +101,29 @@ * Private Type Definition ************************************************************************************/ +/* This structure describes the state of this driver */ + +struct stm32_lower_s +{ + struct ssd1289_lcd_s dev; /* This is externally visible the driver state */ + FAR struct lcd_dev_s *drvr; /* The saved instance of the LCD driver */ + bool output; /* True: Configured for output */ +}; + /************************************************************************************** * Private Function Protototypes **************************************************************************************/ /* Helpers */ -static void stm32_wrdata(uint16_t data); +#ifdef CONFIG_LCD_REGDEBUG +static void stm32_lcdshow(FAR struct stm32_lower_s *priv, FAR const char *msg); +#else +# define stm32_lcdshow(p,m) +#endif + +static void stm32_wrdata(FAR struct stm32_lower_s *priv, uint16_t data); #ifndef CONFIG_SSD1289_WRONLY -static uint16_t stm32_rddata(void); +static inline uint16_t stm32_rddata(FAR struct stm32_lower_s *priv); #endif /* Low Level LCD access */ @@ -121,6 +137,11 @@ static uint16_t stm32_read(FAR struct ssd1289_lcd_s *dev); static void stm32_write(FAR struct ssd1289_lcd_s *dev, uint16_t data); static void stm32_backlight(FAR struct ssd1289_lcd_s *dev, int power); +/* Initialization */ + +static void stm32_lcdinput(FAR struct stm32_lower_s *priv); +static void stm32_lcdoutput(FAR struct stm32_lower_s *priv); + /************************************************************************************ * Private Data ************************************************************************************/ @@ -224,29 +245,56 @@ static const uint32_t g_lcdconfig[] = }; #define NLCD_CONFIG (sizeof(g_lcdconfig)/sizeof(uint32_t)) -/* This is the driver state structure (there is no retained state information) */ +/* Driver state structure (only supports one LCD) */ -static struct ssd1289_lcd_s g_ssd1289 = +static struct stm32_lower_s g_lcdlower = { - .select = stm32_select, - .deselect = stm32_deselect, - .index = stm32_index, + { + .select = stm32_select, + .deselect = stm32_deselect, + .index = stm32_index, #ifndef CONFIG_SSD1289_WRONLY - .read = stm32_read, + .read = stm32_read, #endif - .write = stm32_write, - .backlight = stm32_backlight + .write = stm32_write, + .backlight = stm32_backlight + }, + .drvr = NULL, + .output = false }; -/* The saved instance of the LCD driver */ - -static FAR struct lcd_dev_s *g_ssd1289drvr; - /************************************************************************************ * Private Functions ************************************************************************************/ /************************************************************************************ + * Name: stm32_lcdshow + * + * Description: + * Show the state of the interface + * + ************************************************************************************/ + +#ifdef CONFIG_LCD_REGDEBUG +static void stm32_lcdshow(FAR struct stm32_lower_s *priv, FAR const char *msg) +{ + dbg("%s:\n", msg); + dbg(" CRTL RS: %d CS: %d RD: %d WR: %d LE: %d\n", + getreg32(LCD_RS_READ), getreg32(LCD_CS_READ), getreg32(LCD_RD_READ), + getreg32(LCD_WR_READ), getreg32(LCD_LE_READ)); + dbg(" DATA CR: %08x %08x\n", getreg32(LCD_CRL), getreg32(LCD_CRH)); + if (priv->output) + { + dbg(" OUTPUT: %08x\n", getreg32(LCD_ODR)); + } + else + { + dbg(" INPUT: %08x\n", getreg32(LCD_IDR)); + } +} +#endif + +/************************************************************************************ * Name: stm32_wrdata * * Description: @@ -254,11 +302,11 @@ static FAR struct lcd_dev_s *g_ssd1289drvr; * ************************************************************************************/ -static void stm32_wrdata(uint16_t data) +static void stm32_wrdata(FAR struct stm32_lower_s *priv, uint16_t data) { /* Make sure D0-D15 are configured as outputs */ - stm32_lcdoutput(); + stm32_lcdoutput(priv); /* Latch the 16-bit LCD data and toggle the WR line */ @@ -276,18 +324,17 @@ static void stm32_wrdata(uint16_t data) ************************************************************************************/ #ifndef CONFIG_SSD1289_WRONLY -static uint16_t stm32_rddata(void); +static inline uint16_t stm32_rddata(FAR struct stm32_lower_s *priv) { /* Make sure D0-D15 are configured as inputs */ - stm32_lcdinput(); + stm32_lcdinput(priv); /* Toggle the RD line to latch the 16-bit LCD data */ -#warning "Requires pins configured as inputs" putreg32(1, LCD_RD_CLEAR); putreg32(1, LCD_RD_SET); - return (uin16_t)getreg32(LCD_IDR); + return (uint16_t)getreg32(LCD_IDR); } #endif @@ -322,7 +369,7 @@ static void stm32_deselect(FAR struct ssd1289_lcd_s *dev) } /************************************************************************************ - * Name: stm32_deselect + * Name: stm32_index * * Description: * Set the index register @@ -331,13 +378,15 @@ static void stm32_deselect(FAR struct ssd1289_lcd_s *dev) static void stm32_index(FAR struct ssd1289_lcd_s *dev, uint8_t index) { - /* Clear the RS signal */ + FAR struct stm32_lower_s *priv = (FAR struct stm32_lower_s *)dev; - putreg32(1, LCD_RS_CLR); + /* Clear the RS signal to select the index address */ + + putreg32(1, LCD_RS_CLEAR); /* And write the index */ - stm32_wrdata((uint16_t)index); + stm32_wrdata(priv, (uint16_t)index); } /************************************************************************************ @@ -351,13 +400,15 @@ static void stm32_index(FAR struct ssd1289_lcd_s *dev, uint8_t index) #ifndef CONFIG_SSD1289_WRONLY static uint16_t stm32_read(FAR struct ssd1289_lcd_s *dev) { - /* Set the RS signal */ + FAR struct stm32_lower_s *priv = (FAR struct stm32_lower_s *)dev; + + /* Set the RS signal to select the data address */ - putreg32(1, LCD_RS_CLR); + putreg32(1, LCD_RS_SET); - /* And return the data */ + /* Read and return the data */ - return stm32_rddata(); + return stm32_rddata(priv); } #endif @@ -371,13 +422,15 @@ static uint16_t stm32_read(FAR struct ssd1289_lcd_s *dev) static void stm32_write(FAR struct ssd1289_lcd_s *dev, uint16_t data) { - /* Set the RS signal */ + FAR struct stm32_lower_s *priv = (FAR struct stm32_lower_s *)dev; - putreg32(1, LCD_RS_CLR); + /* Set the RS signal to select the data address */ + + putreg32(1, LCD_RS_SET); /* And write the data */ - stm32_wrdata(data); + stm32_wrdata(priv, data); } /************************************************************************************ @@ -401,21 +454,31 @@ static void stm32_backlight(FAR struct ssd1289_lcd_s *dev, int power) * ************************************************************************************/ -static void stm32_lcdinput(void) +static void stm32_lcdinput(FAR struct stm32_lower_s *priv) { -#ifdef CONFIG_LCD_FASTCONFIG - putreg32(LCD_INPUT, LCD_CRL); - putreg32(LCD_INPUT, LCD_CRH); -#else +#ifndef CONFIG_LCD_FASTCONFIG int i; +#endif - /* Configure GPIO data lines as inputs */ + /* Check if we are already configured for input */ - for (i = 0; i < 16; i++) + if (priv->output) { - stm32_configgpio(g_lcdin[i]); - } + /* Configure GPIO data lines as inputs */ + +#ifdef CONFIG_LCD_FASTCONFIG + putreg32(LCD_INPUT, LCD_CRL); + putreg32(LCD_INPUT, LCD_CRH); +#else + for (i = 0; i < 16; i++) + { + stm32_configgpio(g_lcdin[i]); + } #endif + /* No longer configured for output */ + + priv->output = false; + } } /************************************************************************************ @@ -426,15 +489,30 @@ static void stm32_lcdinput(void) * ************************************************************************************/ -static void stm32_lcdoutput(void) +static void stm32_lcdoutput(FAR struct stm32_lower_s *priv) { +#ifndef CONFIG_LCD_FASTCONFIG int i; +#endif - /* Configure GPIO data lines as outputs */ + /* Check if we are already configured for output */ - for (i = 0; i < 16; i++) + if (!priv->output) { - stm32_configgpio(g_lcdout[i]); + /* Configure GPIO data lines as outputs */ + +#ifdef CONFIG_LCD_FASTCONFIG + putreg32(LCD_OUTPUT, LCD_CRL); + putreg32(LCD_OUTPUT, LCD_CRH); +#else + for (i = 0; i < 16; i++) + { + stm32_configgpio(g_lcdout[i]); + } +#endif + /* Now we are configured for output */ + + priv->output = true; } } @@ -454,17 +532,18 @@ static void stm32_lcdoutput(void) int up_lcdinitialize(void) { + FAR struct stm32_lower_s *priv = &g_lcdlower; int i; /* Only initialize the driver once */ - if (!g_ssd1289drvr) + if (!priv->drvr) { lcdvdbg("Initializing\n"); /* Configure GPIO pins */ - stm32_lcdoutput(); + stm32_lcdoutput(priv); for (i = 0; i < NLCD_CONFIG; i++) { stm32_configgpio(g_lcdconfig[i]); @@ -472,8 +551,8 @@ int up_lcdinitialize(void) /* Configure and enable the LCD */ - g_ssd1289drvr = ssd1289_lcdinitialize(&g_ssd1289); - if (!g_ssd1289drvr) + priv->drvr = ssd1289_lcdinitialize(&priv->dev); + if (!priv->drvr) { lcddbg("ERROR: ssd1289_lcdinitialize failed\n"); return -ENODEV; @@ -482,7 +561,7 @@ int up_lcdinitialize(void) /* Turn the display off */ - g_ssd1289drvr->setpower(g_ssd1289drvr, 0); + priv->drvr->setpower(priv->drvr, 0); return OK; } @@ -497,8 +576,9 @@ int up_lcdinitialize(void) FAR struct lcd_dev_s *up_lcdgetdev(int lcddev) { + FAR struct stm32_lower_s *priv = &g_lcdlower; DEBUGASSERT(lcddev == 0); - return g_ssd1289drvr; + return priv->drvr; } /************************************************************************************ @@ -511,9 +591,11 @@ FAR struct lcd_dev_s *up_lcdgetdev(int lcddev) void up_lcduninitialize(void) { + FAR struct stm32_lower_s *priv = &g_lcdlower; + /* Turn the display off */ - g_ssd1289drvr->setpower(g_ssd1289drvr, 0); + priv->drvr->setpower(priv->drvr, 0); } #endif /* CONFIG_LCD_SSD1289 */ |