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author | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2012-09-13 18:32:24 +0000 |
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committer | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2012-09-13 18:32:24 +0000 |
commit | df4622c8aa68493604f1e611eeb50c0960bb61a9 (patch) | |
tree | 1628300d9dbfac947ef9a9a8ec6013337cba17bb /nuttx/configs/teensy/src/up_spi.c | |
parent | 0661f846bdd4ef584ab5d0e85e3fecf74a1d9922 (diff) | |
download | px4-nuttx-df4622c8aa68493604f1e611eeb50c0960bb61a9.tar.gz px4-nuttx-df4622c8aa68493604f1e611eeb50c0960bb61a9.tar.bz2 px4-nuttx-df4622c8aa68493604f1e611eeb50c0960bb61a9.zip |
Email address change in nuttx/
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@5145 42af7a65-404d-4744-a932-0658087f49c3
Diffstat (limited to 'nuttx/configs/teensy/src/up_spi.c')
-rw-r--r-- | nuttx/configs/teensy/src/up_spi.c | 404 |
1 files changed, 202 insertions, 202 deletions
diff --git a/nuttx/configs/teensy/src/up_spi.c b/nuttx/configs/teensy/src/up_spi.c index e3284be08..a4eed9836 100644 --- a/nuttx/configs/teensy/src/up_spi.c +++ b/nuttx/configs/teensy/src/up_spi.c @@ -1,202 +1,202 @@ -/************************************************************************************
- * configs/teensy/src/up_spi.c
- * arch/arm/src/board/up_spi.c
- *
- * 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.
- *
- ************************************************************************************/
-
-/************************************************************************************
- * Included Files
- ************************************************************************************/
-
-#include <nuttx/config.h>
-
-#include <stdint.h>
-#include <stdbool.h>
-#include <debug.h>
-
-#include <nuttx/spi.h>
-#include <arch/board/board.h>
-#include <avr/io.h>
-
-#include "up_arch.h"
-#include "chip.h"
-#include "at90usb_internal.h"
-#include "teensy_internal.h"
-
-#ifdef CONFIG_AVR_SPI
-
-/************************************************************************************
- * Definitions
- ************************************************************************************/
-/* Teensy SPI Connection
- *
- * -- ---- -- ------------------------- -------
- * J2 NAME PIN NAME PAD
- * -- ---- -- ------------------------- -------
- * 1 VIN -- Connected to USB +RV
- * 2 GND -- Connected to USB GND
- * 3 3V3 -- Not used ---
- * 4 NC -- Not used
- * 5 CS 10 (SS/PCINT0) PB0 Pad B0
- * 6 DI 12 (PDI/PCINT2/MOSI) PB2 Pad B2
- * 7 SCK 11 (PCINT1/SCLK) PB1 Pad B1
- * 8 DO 13 (PDO/PCINT3/MISO) PB3 Pad B3
- * 9 IRQ -- Not used ---
- * 10 CD 14 (PCINT4/OC.2A) PB4 Pad B4
- * 11 WP 15 (PCINT5/OC.1A) PB5 Pad B5
- * -- ---- -- ------------------------- -------
- */
-
-#define TEENSY_CS (1 << 0)
-#define TEENSY_CD (1 << 4)
-#define TEENSY_WP (1 << 5)
-
-/* The following enable debug output from this file (needs CONFIG_DEBUG too).
- *
- * CONFIG_SPI_DEBUG - Define to enable basic SSP debug
- * CONFIG_SPI_VERBOSE - Define to enable verbose SSP debug
- */
-
-#ifdef CONFIG_SPI_DEBUG
-# define sspdbg lldbg
-# ifdef CONFIG_SPI_VERBOSE
-# define sspvdbg lldbg
-# else
-# define sspvdbg(x...)
-# endif
-#else
-# undef CONFIG_SPI_VERBOSE
-# define sspdbg(x...)
-# define sspvdbg(x...)
-#endif
-
-/************************************************************************************
- * Private Functions
- ************************************************************************************/
-
-/************************************************************************************
- * Public Functions
- ************************************************************************************/
-
-/************************************************************************************
- * Name: at90usb_spiinitialize
- *
- * Description:
- * Called to configure SPI chip select GPIO pins for the LPC1766-STK.
- *
- ************************************************************************************/
-
-void weak_function at90usb_spiinitialize(void)
-{
- /* The Teensy board has no dedicated SPI devices so we assume that SS is used
- * for chip select:
- *
- * "When the SPI is configured as a Master (MSTR in SPCR is set), the user
- * can determine the direction of the SS pin. If SS is configured as an
- * output, the pin is a general output pin which does not affect the SPI
- * system. ...
- *
- * "If SS is configured as an input, it must be held high to ensure Master
- * SPI operation. If the SS pin is driven low by peripheral circuitry when
- * the SPI is configured as a Master with the SS pin defined as an input,
- * the SPI system interprets this as another master selecting the SPI ...
- */
-
- DDRB |= TEENSY_CS; /* B0 is an output */
- PORTB |= TEENSY_CS; /* Low de-selects */
- DDRB &= ~(TEENSY_CD | TEENSY_WP); /* B4 and B5 are inputs */
- PORTB |= (TEENSY_CD | TEENSY_WP); /* Pull high */
-}
-
-/************************************************************************************
- * Name: avr_spiselect and avr_spistatus
- *
- * Description:
- * The external functions, avr_spiselect and avr_spistatus must be provided by
- * board-specific logic. They are implementations of the select and status methods
- * of the SPI interface defined by struct spi_ops_s (see include/nuttx/spi.h). All
- * other methods (including up_spiinitialize()) are provided by common AVR logic.
- * To use this common SPI logic on your board:
- *
- * 1. Provide logic in avr_sspinitialize() to configure SPI chip select pins.
- * 2. Provide avr_spiselect() and avr_spistatus() functions in your board-specific
- * logic. These functions will perform chip selection and status operations
- * in the way your board is configured.
- * 3. Add a calls to at90usb_spiinitialize() in your low level application
- * initialization logic
- * 4. The handle returned by up_spiinitialize() may then be used to bind the
- * SPI driver to higher level logic (e.g., calling mmcsd_spislotinitialize(),
- * for example, will bind the SPI driver to the SPI MMC/SD driver).
- *
- ************************************************************************************/
-
-void avr_spiselect(FAR struct spi_dev_s *dev, enum spi_dev_e devid, bool selected)
-{
- sspdbg("devid: %d CS: %s\n", (int)devid, selected ? "assert" : "de-assert");
-
- /* Assert/de-assert the CS pin to the card */
-
- if (selected)
- {
- PORTB &= ~TEENSY_CS;
- }
- else
- {
- PORTB |= TEENSY_CS;
- }
-}
-
-uint8_t avr_spistatus(FAR struct spi_dev_s *dev, enum spi_dev_e devid)
-{
- uint8_t ret = 0;
- uint8_t regval = PINB;
-
- /* Both the CD and WP pins are pull high by the AT90USB and will be
- * grounded it a card is inserted or write protected.
- */
-
- if ((regval & TEENSY_CD) == 0)
- {
- ret |= SPI_STATUS_PRESENT;
- }
-
- if ((regval & TEENSY_WP) == 0)
- {
- ret |= SPI_STATUS_WRPROTECTED;
- }
-
- sspdbg("Returning %02x\n", ret);
- return ret;
-}
-
-#endif /* CONFIG_AVR_SPI */
+/************************************************************************************ + * configs/teensy/src/up_spi.c + * arch/arm/src/board/up_spi.c + * + * Copyright (C) 2011 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <gnutt@nuttx.org> + * + * 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. + * + ************************************************************************************/ + +/************************************************************************************ + * Included Files + ************************************************************************************/ + +#include <nuttx/config.h> + +#include <stdint.h> +#include <stdbool.h> +#include <debug.h> + +#include <nuttx/spi.h> +#include <arch/board/board.h> +#include <avr/io.h> + +#include "up_arch.h" +#include "chip.h" +#include "at90usb_internal.h" +#include "teensy_internal.h" + +#ifdef CONFIG_AVR_SPI + +/************************************************************************************ + * Definitions + ************************************************************************************/ +/* Teensy SPI Connection + * + * -- ---- -- ------------------------- ------- + * J2 NAME PIN NAME PAD + * -- ---- -- ------------------------- ------- + * 1 VIN -- Connected to USB +RV + * 2 GND -- Connected to USB GND + * 3 3V3 -- Not used --- + * 4 NC -- Not used + * 5 CS 10 (SS/PCINT0) PB0 Pad B0 + * 6 DI 12 (PDI/PCINT2/MOSI) PB2 Pad B2 + * 7 SCK 11 (PCINT1/SCLK) PB1 Pad B1 + * 8 DO 13 (PDO/PCINT3/MISO) PB3 Pad B3 + * 9 IRQ -- Not used --- + * 10 CD 14 (PCINT4/OC.2A) PB4 Pad B4 + * 11 WP 15 (PCINT5/OC.1A) PB5 Pad B5 + * -- ---- -- ------------------------- ------- + */ + +#define TEENSY_CS (1 << 0) +#define TEENSY_CD (1 << 4) +#define TEENSY_WP (1 << 5) + +/* The following enable debug output from this file (needs CONFIG_DEBUG too). + * + * CONFIG_SPI_DEBUG - Define to enable basic SSP debug + * CONFIG_SPI_VERBOSE - Define to enable verbose SSP debug + */ + +#ifdef CONFIG_SPI_DEBUG +# define sspdbg lldbg +# ifdef CONFIG_SPI_VERBOSE +# define sspvdbg lldbg +# else +# define sspvdbg(x...) +# endif +#else +# undef CONFIG_SPI_VERBOSE +# define sspdbg(x...) +# define sspvdbg(x...) +#endif + +/************************************************************************************ + * Private Functions + ************************************************************************************/ + +/************************************************************************************ + * Public Functions + ************************************************************************************/ + +/************************************************************************************ + * Name: at90usb_spiinitialize + * + * Description: + * Called to configure SPI chip select GPIO pins for the LPC1766-STK. + * + ************************************************************************************/ + +void weak_function at90usb_spiinitialize(void) +{ + /* The Teensy board has no dedicated SPI devices so we assume that SS is used + * for chip select: + * + * "When the SPI is configured as a Master (MSTR in SPCR is set), the user + * can determine the direction of the SS pin. If SS is configured as an + * output, the pin is a general output pin which does not affect the SPI + * system. ... + * + * "If SS is configured as an input, it must be held high to ensure Master + * SPI operation. If the SS pin is driven low by peripheral circuitry when + * the SPI is configured as a Master with the SS pin defined as an input, + * the SPI system interprets this as another master selecting the SPI ... + */ + + DDRB |= TEENSY_CS; /* B0 is an output */ + PORTB |= TEENSY_CS; /* Low de-selects */ + DDRB &= ~(TEENSY_CD | TEENSY_WP); /* B4 and B5 are inputs */ + PORTB |= (TEENSY_CD | TEENSY_WP); /* Pull high */ +} + +/************************************************************************************ + * Name: avr_spiselect and avr_spistatus + * + * Description: + * The external functions, avr_spiselect and avr_spistatus must be provided by + * board-specific logic. They are implementations of the select and status methods + * of the SPI interface defined by struct spi_ops_s (see include/nuttx/spi.h). All + * other methods (including up_spiinitialize()) are provided by common AVR logic. + * To use this common SPI logic on your board: + * + * 1. Provide logic in avr_sspinitialize() to configure SPI chip select pins. + * 2. Provide avr_spiselect() and avr_spistatus() functions in your board-specific + * logic. These functions will perform chip selection and status operations + * in the way your board is configured. + * 3. Add a calls to at90usb_spiinitialize() in your low level application + * initialization logic + * 4. The handle returned by up_spiinitialize() may then be used to bind the + * SPI driver to higher level logic (e.g., calling mmcsd_spislotinitialize(), + * for example, will bind the SPI driver to the SPI MMC/SD driver). + * + ************************************************************************************/ + +void avr_spiselect(FAR struct spi_dev_s *dev, enum spi_dev_e devid, bool selected) +{ + sspdbg("devid: %d CS: %s\n", (int)devid, selected ? "assert" : "de-assert"); + + /* Assert/de-assert the CS pin to the card */ + + if (selected) + { + PORTB &= ~TEENSY_CS; + } + else + { + PORTB |= TEENSY_CS; + } +} + +uint8_t avr_spistatus(FAR struct spi_dev_s *dev, enum spi_dev_e devid) +{ + uint8_t ret = 0; + uint8_t regval = PINB; + + /* Both the CD and WP pins are pull high by the AT90USB and will be + * grounded it a card is inserted or write protected. + */ + + if ((regval & TEENSY_CD) == 0) + { + ret |= SPI_STATUS_PRESENT; + } + + if ((regval & TEENSY_WP) == 0) + { + ret |= SPI_STATUS_WRPROTECTED; + } + + sspdbg("Returning %02x\n", ret); + return ret; +} + +#endif /* CONFIG_AVR_SPI */ |