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author | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2011-02-20 15:19:44 +0000 |
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committer | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2011-02-20 15:19:44 +0000 |
commit | 2d795267b97ca49c544ca4a38dbf3771d3cd4697 (patch) | |
tree | 84c0f2def09c2c2e7712cc448ed152cb3652ad4b /nuttx/arch/hc/src/m9s12 | |
parent | 2beb149e9bbba41c18ec8b3d83c2ba81c39b35a0 (diff) | |
download | px4-nuttx-2d795267b97ca49c544ca4a38dbf3771d3cd4697.tar.gz px4-nuttx-2d795267b97ca49c544ca4a38dbf3771d3cd4697.tar.bz2 px4-nuttx-2d795267b97ca49c544ca4a38dbf3771d3cd4697.zip |
Add m9s12 serial logic
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@3305 42af7a65-404d-4744-a932-0658087f49c3
Diffstat (limited to 'nuttx/arch/hc/src/m9s12')
-rwxr-xr-x | nuttx/arch/hc/src/m9s12/m9s12_lowputc.S | 107 | ||||
-rwxr-xr-x | nuttx/arch/hc/src/m9s12/m9s12_serial.h | 94 | ||||
-rwxr-xr-x | nuttx/arch/hc/src/m9s12/m9s12_start.S | 5 |
3 files changed, 202 insertions, 4 deletions
diff --git a/nuttx/arch/hc/src/m9s12/m9s12_lowputc.S b/nuttx/arch/hc/src/m9s12/m9s12_lowputc.S index e4bc7858c..a04d6a1d8 100755 --- a/nuttx/arch/hc/src/m9s12/m9s12_lowputc.S +++ b/nuttx/arch/hc/src/m9s12/m9s12_lowputc.S @@ -41,12 +41,65 @@ #include "up_internal.h" #include "m9s12_internal.h" -#include "m9s12_flash.h" +#include "m9s12_sci.h" +#include "m9s12_serial.h" + +#ifdef CONFIG_HCS12_SERIALMON +# include "m9s12_flash.h" +#endif /************************************************************************** * Private Definitions **************************************************************************/ +/* Select SCI parameters for the selected console */ + +#if defined(CONFIG_SCI0_SERIAL_CONSOLE) +# define HCS12_CONSOLE_BASE HCS12_SCI0_BASE +# define HCS12_CONSOLE_BAUD CONFIG_SCI0_BAUD +# define HCS12_CONSOLE_BITS CONFIG_SCI0_BITS +# define HCS12_CONSOLE_PARITY CONFIG_SCI0_PARITY +# define HCS12_CONSOLE_2STOP CONFIG_SCI0_2STOP +#elif defined(CONFIG_SCI1_SERIAL_CONSOLE) +# define HCS12_CONSOLE_BASE HCS12_SCI1_BASE +# define HCS12_CONSOLE_BAUD CONFIG_SCI1_BAUD +# define HCS12_CONSOLE_BITS CONFIG_SCI1_BITS +# define HCS12_CONSOLE_PARITY CONFIG_SCI1_PARITY +# define HCS12_CONSOLE_2STOP CONFIG_SCI1_2STOP +#else +# warning "No CONFIG_SCIn_SERIAL_CONSOLE Setting" +#endif + +/* Selete the SCIBR register value */ + +#define CONSOLE_SCIBR_VALUE SCIBR_VALUE(HCS12_CONSOLE_BAUD) + +/* Select the SCICR1 register settings */ + +#if HCS12_CONSOLE_BITS == 9 +# define UART_SCICR1_NBITS SCI_CR1_M +#elif HCS12_CONSOLE_BITS == 8 +# define UART_SCICR1_NBITS 0 +#else +# warning "Number of bits not supported" +#endif + +#if HCS12_CONSOLE_PARITY == 0 +# define UART_SCICR1_PARITY 0 +#elif HCS12_CONSOLE_PARITY == 1 +# define UART_SCICR1_PARITY SCI_CR1_PE +#elif HCS12_CONSOLE_PARITY == 2 +# define UART_SCICR1_PARITY (SCI_CR1_PE|SCI_CR1_PT) +#else +# error "ERROR: Invalid parity selection" +#endif + +#if HCS12_CONSOLE_2STOP != 0 +# warning "Only a single stop bit supported" +#endif + +#define CONSOLE_SCICR_VALUE (UART_SCICR1_NBITS|UART_SCICR1_PARITY) + /************************************************************************** * Private Types **************************************************************************/ @@ -82,7 +135,31 @@ up_lowsetup: #ifdef CONFIG_HCS12_SERIALMON rts #else -# error "up_lowsetup not implemented" + /* Disable the console */ + + ldab #0 + stab (HCS12_CONSOLE_BASE+HCS12_SCI_CR1_OFFSET) + stab (HCS12_CONSOLE_BASE+HCS12_SCI_CR2_OFFSET) + + /* Set the BAUD pre-scaler value */ + + ldab #(CONSOLE_SCIBR_VALUE >> 8) + stab (HCS12_CONSOLE_BASE+HCS12_SCI_BDH_OFFSET) + + ldab #(CONSOLE_SCIBR_VALUE & 0xff) + stab (HCS12_CONSOLE_BASE+HCS12_SCI_BDL_OFFSET) + + /* Set number of bits, parity, stop bits, etc. */ + + ldab #CONSOLE_SCICR_VALUE + stab (HCS12_CONSOLE_BASE+HCS12_SCI_CR1_OFFSET) + + /* Enable transmitter and receiver */ + + ldab #(SCI_CR2_RE|SCI_CR2_TE) + stab (HCS12_CONSOLE_BASE+HCS12_SCI_CR2_OFFSET) + rts + #endif .size up_lowsetup, . - up_lowsetup @@ -97,7 +174,31 @@ up_lowputc: #ifdef CONFIG_HCS12_SERIALMON jmp PutChar #else -# error "up_lowputc not implemented" +# if HCS12_CONSOLE_BITS == 9 + staa 1, -sp +# endif + + /* Wait for the transmit data register to be available (TRDE==1) */ + +.Lwait: + ldaa (HCS12_CONSOLE_BASE+HCS12_SCI_SR1_OFFSET) + bita #SCI_SR1_TDRE + bne .Lwait + + /* Then write the byte to the transmit data register */ + +# if HCS12_CONSOLE_BITS == 9 + ldaa 1, sp+ + bita #(0x01) + bne .L8bit + ldaa #SCI_DRH_T8 + bra .Lwrdrh +.L8bit: + ldaa #0 +.Lwrdrh: + staa (HCS12_CONSOLE_BASE+HCS12_SCI_DRH_OFFSET) +# endif + stab (HCS12_CONSOLE_BASE+HCS12_SCI_DRL_OFFSET) rts #endif .size up_lowputc, . - up_lowputc diff --git a/nuttx/arch/hc/src/m9s12/m9s12_serial.h b/nuttx/arch/hc/src/m9s12/m9s12_serial.h new file mode 100755 index 000000000..107440616 --- /dev/null +++ b/nuttx/arch/hc/src/m9s12/m9s12_serial.h @@ -0,0 +1,94 @@ +/************************************************************************************ + * arch/hc/src/m9s12/serial.h + * + * Copyright (C) 2011 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <spudmonkey@racsa.co.cr> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ************************************************************************************/ + +#ifndef __ARCH_HC_SRC_M9S12_CHIP_H +#define __ARCH_HC_SRC_M9S12_CHIP_H + +/************************************************************************************ + * Included Files + ************************************************************************************/ + +#include <nuttx/config.h> +#include <arch/board/board.h> + +/************************************************************************************ + * Pre-processor Definitions + ************************************************************************************/ +/* Configuration ********************************************************************/ + +/* Is there a SCI enabled? */ + +#if defined(CONFIG_SCI0_DISABLE) && defined(CONFIG_SCI1_DISABLE) +# error "No SCIs enabled" +#endif + +/* Is there a serial console? */ + +#if defined(CONFIG_SCI0_SERIAL_CONSOLE) && !defined(CONFIG_SCI0_DISABLE) +# undef CONFIG_SCI1_SERIAL_CONSOLE +# define HAVE_CONSOLE 1 +#elif defined(CONFIG_SCI1_SERIAL_CONSOLE) && !defined(CONFIG_SCI1_DISABLE) +# undef CONFIG_SCI0_SERIAL_CONSOLE +# define HAVE_CONSOLE 1 +#else +# warning "No valid CONFIG_SCIn_SERIAL_CONSOLE Setting" +# undef CONFIG_SCI0_SERIAL_CONSOLE +# undef CONFIG_SCI1_SERIAL_CONSOLE +# undef HAVE_CONSOLE +#endif + +/* BAUD *****************************************************************************/ +/* Baud calculations. The SCI module is driven by the BUSCLK. The SCIBR + * register value divides down the BUSCLK to accomplish the required BAUD. + * + * BAUD = HCS12_BUSCLK / (16 * SCIBR) + * SCIBR = HCS12_BUSCLK / (16 * BAUD) + */ + +#define SCIBR_VALUE(b) ((HCS12_BUSCLK * (b) + ((b) << 3))/((b) << 4)) + +/************************************************************************************ + * Public Types + ************************************************************************************/ + +/************************************************************************************ + * Public Data + ************************************************************************************/ + +/************************************************************************************ + * Public Functions + ************************************************************************************/ + +#endif /* __ARCH_HC_SRC_M9S12_CHIP_H */ diff --git a/nuttx/arch/hc/src/m9s12/m9s12_start.S b/nuttx/arch/hc/src/m9s12/m9s12_start.S index b7585d75b..ad5a39c0d 100755 --- a/nuttx/arch/hc/src/m9s12/m9s12_start.S +++ b/nuttx/arch/hc/src/m9s12/m9s12_start.S @@ -40,6 +40,8 @@ #include <nuttx/config.h> +#include <arch/board/board.h> + #include "m9s12_internal.h" #include "m9s12_mmc.h" #include "m9s12_crg.h" @@ -118,8 +120,9 @@ /* Set the multipler and divider and enable the PLL */ bclr *HCS12_CRG_PLLCTL #CRG_PLLCTL_PLLON - ldab #15 + ldab #HCS12_SYNR_VALUE stab HCS12_CRG_SYNR + ldab #HCS12_REFDV_VALUE stab HCS12_CRG_REFDV bset *HCS12_CRG_PLLCTL #CRG_PLLCTL_PLLON |