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author | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2009-02-19 02:08:36 +0000 |
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committer | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2009-02-19 02:08:36 +0000 |
commit | 0fe675d58c8be8b7eaafc8c36cbd096c3738a761 (patch) | |
tree | 7a1ed67684df0e6888dc07629bf55d044205ef65 /nuttx/arch/sh/src/m16c/m16c_lowputc.c | |
parent | d5f59548acb539c73b4d9f3667ce705b0682d7d2 (diff) | |
download | px4-nuttx-0fe675d58c8be8b7eaafc8c36cbd096c3738a761.tar.gz px4-nuttx-0fe675d58c8be8b7eaafc8c36cbd096c3738a761.tar.bz2 px4-nuttx-0fe675d58c8be8b7eaafc8c36cbd096c3738a761.zip |
Add basic LCD support
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@1517 42af7a65-404d-4744-a932-0658087f49c3
Diffstat (limited to 'nuttx/arch/sh/src/m16c/m16c_lowputc.c')
-rw-r--r-- | nuttx/arch/sh/src/m16c/m16c_lowputc.c | 124 |
1 files changed, 80 insertions, 44 deletions
diff --git a/nuttx/arch/sh/src/m16c/m16c_lowputc.c b/nuttx/arch/sh/src/m16c/m16c_lowputc.c index c08a0ec20..6c10a6468 100644 --- a/nuttx/arch/sh/src/m16c/m16c_lowputc.c +++ b/nuttx/arch/sh/src/m16c/m16c_lowputc.c @@ -49,12 +49,6 @@ #include "up_internal.h" #include "m16c_uart.h" -/* Is there any serial support? This might be the case if the board does - * not have serial ports but supports stdout through, say, an LCD. - */ - -#if !defined(CONFIG_UART0_DISABLE) && !defined(CONFIG_UART1_DISABLE) && !defined(CONFIG_UART2_DISABLE) - /************************************************************************** * Private Definitions **************************************************************************/ @@ -65,26 +59,40 @@ # define M16C_XIN_PRESCALER 1 #endif -/* We know that we have a serial port enabled. Is one of them a serial console? */ +/* Is there any serial support? This might be the case if the board does + * not have serial ports but supports stdout through, say, an LCD. + */ + +#if defined(CONFIG_UART0_DISABLE) || defined(CONFIG_UART1_DISABLE) || defined(CONFIG_UART2_DISABLE) +# define HAVE_SERIAL +#else +# undef HAVE_SERIAL +#endif + +/* Is one of the serial ports a console? */ #if defined(CONFIG_UART0_SERIAL_CONSOLE) && !defined(CONFIG_UART0_DISABLE) -# define HAVE_CONSOLE 1 +# define HAVE_SERIALCONSOLE 1 # undef CONFIG_UART1_SERIAL_CONSOLE # undef CONFIG_UART2_SERIAL_CONSOLE #elif defined(CONFIG_UART1_SERIAL_CONSOLE) && !defined(CONFIG_UART1_DISABLE) -# define HAVE_CONSOLE 1 +# define HAVE_SERIALCONSOLE 1 # undef CONFIG_UART0_SERIAL_CONSOLE # undef CONFIG_UART2_SERIAL_CONSOLE #elif defined(CONFIG_UART2_SERIAL_CONSOLE) && !defined(CONFIG_UART2_DISABLE) -# define HAVE_CONSOLE 1 +# define HAVE_SERIALCONSOLE 1 # undef CONFIG_UART0_SERIAL_CONSOLE # undef CONFIG_UART1_SERIAL_CONSOLE #else -# undef HAVE_CONSOLE +# if defined(CONFIG_UART0_SERIAL_CONSOLE) || defined(CONFIG_UART1_SERIAL_CONSOLE)|| defined(CONFIG_UART2_SERIAL_CONSOLE) +# error "A serial console selected, but corresponding UART not enabled" +# endif +# undef HAVE_SERIALCONSOLE #endif /* Select UART parameters for the selected console */ +#ifdef HAVE_SERIALCONSOLE #if defined(CONFIG_UART0_SERIAL_CONSOLE) # define M16C_UART_BASE M16C_UART0_BASE # define M16C_UART_BAUD CONFIG_UART0_BAUD @@ -155,6 +163,8 @@ #define M16C_UART_BRG_VALUE \ ((M16C_XIN_FREQ / (16 * M16C_XIN_PRESCALER * M16C_UART_BAUD)) - 1) +#endif /* HAVE_SERIALCONSOLE */ + /************************************************************************** * Private Types **************************************************************************/ @@ -183,42 +193,17 @@ * **************************************************************************/ -#ifdef HAVE_CONSOLE +#ifdef HAVE_SERIALCONSOLE static inline int up_txready(void) { /* Check the TI bit in the CI register. 1=Transmit buffer empty */ return ((getreg8(M16C_UART_BASE + M16C_UART_C1) & UART_C1_TI) != 0); } -#endif - -/************************************************************************** - * Public Functions - **************************************************************************/ +#endif /* HAVE_SERIALCONSOLE */ /************************************************************************** - * Name: up_lowputc - * - * Description: - * Output one byte on the serial console - * - **************************************************************************/ - -void up_lowputc(char ch) -{ -#ifdef HAVE_CONSOLE - /* Wait until the transmit buffer is empty */ - - while (!up_txready()); - - /* Write the data to the transmit buffer */ - - putreg16((uint16)ch, M16C_UART_BASE + M16C_UART_TB); -#endif -} - -/************************************************************************** - * Name: up_lowsetup + * Name: up_lowserialsetup * * Description: * This performs basic initialization of the UART used for the serial @@ -227,9 +212,9 @@ void up_lowputc(char ch) * **************************************************************************/ -void up_lowsetup(void) +#if defined(HAVE_SERIALCONSOLE) && !defined(CONFIG_SUPPRESS_UART_CONFIG) +static inline void up_lowserialsetup(void) { -#if defined(HAVE_CONSOLE) && !defined(CONFIG_SUPPRESS_UART_CONFIG) ubyte regval; /* Set the baud rate generator */ @@ -292,10 +277,61 @@ void up_lowsetup(void) /* Read any data left in the RX fifo */ regval = (ubyte)getreg16(M16C_UART_BASE + M16C_UART_RB); +} +#endif /* HAVE_SERIALCONFIG && !CONFIG_SUPPRESS_UART_CONFIG */ + +/************************************************************************** + * Public Functions + **************************************************************************/ + +/************************************************************************** + * Name: up_lowputc + * + * Description: + * Output one byte on the serial console. + * + **************************************************************************/ + +#ifdef HAVE_SERIAL /* Assume needed if we have serial. See for e.g., up_lcd.c */ +void up_lowputc(char ch) +{ +#ifdef HAVE_SERIALCONSOLE + /* Wait until the transmit buffer is empty */ + + while (!up_txready()); + + /* Write the data to the transmit buffer */ + + putreg16((uint16)ch, M16C_UART_BASE + M16C_UART_TB); #endif } +#endif -#elif defined(CONFIG_UART0_SERIAL_CONSOLE) || defined(CONFIG_UART1_SERIAL_CONSOLE)|| defined(CONFIG_UART2_SERIAL_CONSOLE) -# error "A serial console selected, but corresponding UART not enabled" -#endif /* !CONFIG_UART0_DISABLE && !CONFIG_UART1_DISABLE && !CONFIG_UART2_DISABLE */ +/************************************************************************** + * Name: up_lowsetup + * + * Description: + * This performs basic initialization of the UART used for the serial + * console. Its purpose is to get the console output availabe as soon + * as possible. + * + **************************************************************************/ + +void up_lowsetup(void) +{ + /* Here we initialize the serial console early so that it can be used + * for bring-up debugging. + */ +#if defined(HAVE_SERIALCONSOLE) && !defined(CONFIG_SUPPRESS_UART_CONFIG) + up_lowserialsetup() +#endif + + /* The LCD is initialized here to because it may be that the LCD is + * used for console output. + */ + +#ifdef CONFIG_ARCH_LCD + up_lcdinit(); +#endif +} |