200 lines
6.6 KiB
C
200 lines
6.6 KiB
C
/****************************************************************************
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* apps/system/spi/spitool.h
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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#ifndef __APPS_SYSTEM_SPI_SPITOOLS_H
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#define __APPS_SYSTEM_SPI_SPITOOLS_H
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <nuttx/compiler.h>
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#include <sys/types.h>
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#include <stdio.h>
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#include <stdint.h>
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#include <stdbool.h>
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#include <errno.h>
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#include <nuttx/spi/spi_transfer.h>
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/* Configuration ************************************************************/
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/* CONFIG_NSH_BUILTIN_APPS - Build the tools as an NSH built-in command
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* CONFIG_SPITOOL_MINBUS - Smallest bus index supported by the hardware
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* (default 0).
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* CONFIG_SPITOOL_MAXBUS - Largest bus index supported by the hardware
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* (default 3)
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* CONFIG_SPITOOL_DEFFREQ - Default frequency (default: 40000000)
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* CONFIG_SPITOOL_DEFMODE - Default mode, where;
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* 0 = CPOL=0, CPHA=0
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* 1 = CPOL=0, CPHA=1
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* 2 = CPOL=1, CPHA=0
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* 3 = CPOL=1, CPHA=1
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* CONFIG_SPITOOL_DEFWIDTH - Default bit width (default 8)
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* CONFIG_SPITOOL_DEFWORDS - Default number of words to exchange
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* (default 1)
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*/
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#ifndef CONFIG_SPITOOL_MINBUS
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# define CONFIG_SPITOOL_MINBUS 0
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#endif
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#ifndef CONFIG_SPITOOL_MAXBUS
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# define CONFIG_SPITOOL_MAXBUS 3
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#endif
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#ifndef CONFIG_SPITOOL_DEFFREQ
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# define CONFIG_SPITOOL_DEFFREQ 4000000
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#endif
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#ifndef CONFIG_SPITOOL_DEFMODE
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#define CONFIG_SPITOOL_DEFMODE 0 /* CPOL=0, CPHA=0 */
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#endif
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#ifndef CONFIG_SPITOOL_DEFWIDTH
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#define CONFIG_SPITOOL_DEFWIDTH 8
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#endif
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#ifndef CONFIG_SPITOOL_DEFWORDS
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#define CONFIG_SPITOOL_DEFWORDS 1
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#endif
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/* This is the maximum number of arguments that will be accepted for a
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* command. This is only used for sizing a hardcoded array and is set
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* to be sufficiently large to support all possible SPI tool arguments and
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* then some.
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*/
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#define MAX_ARGUMENTS 12
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/* Maximum size of one command line */
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#define MAX_LINELEN 80
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#define MAX_XDATA (MAX_LINELEN/2)
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/* Are we using the NuttX console for I/O? Or some other character device? */
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#ifdef CONFIG_SPITOOL_INDEV
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# define INFD(p) ((p)->ss_infd)
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# define INSTREAM(p) ((p)->ss_instream)
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#else
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# define INFD(p) 0
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# define INSTREAM(p) stdin
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#endif
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#ifdef CONFIG_SPITOOL_OUTDEV
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# define OUTFD(p) ((p)->ss_outfd)
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# define OUTSTREAM(p) ((p)->ss_outstream)
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#else
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# define OUTFD(p) 1
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# define OUTSTREAM(p) stdout
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#endif
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/* Output is via printf but can be changed using this macro */
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# define spi_output printf
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/****************************************************************************
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* Public Types
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****************************************************************************/
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struct spitool_s
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{
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/* Sticky options */
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uint8_t bus; /* [-b bus] is the SPI bus number */
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uint8_t width; /* [-w width] is the data width (8 or 16) */
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uint32_t freq; /* [-f freq] SPI frequency */
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uint32_t count; /* [-x count] No of words to exchange */
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uint32_t csn; /* [-n CSn] Chip select number for devtype */
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uint32_t devtype; /* [-t devtype] DevType (see spi_devtype_e) */
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bool command; /* [-c 0|1] Send as command or data? */
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useconds_t udelay; /* [-u udelay] Delay in uS after transfer */
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uint8_t mode; /* [-m mode] Mode to use for transfer */
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/* Output streams */
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#ifdef CONFIG_SPITOOL_OUTDEV
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int ss_outfd; /* Output file descriptor */
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FILE *ss_outstream; /* Output stream */
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#endif
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};
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typedef int (*cmd_t)(FAR struct spitool_s *spitool, int argc,
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FAR char **argv);
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struct cmdmap_s
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{
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FAR const char *cmd; /* Name of the command */
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cmd_t handler; /* Function that handles the command */
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FAR const char *desc; /* Short description */
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FAR const char *usage; /* Usage instructions for 'help' command */
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};
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/****************************************************************************
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* Public Data
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****************************************************************************/
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extern const char g_spiargrequired[];
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extern const char g_spiarginvalid[];
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extern const char g_spiargrange[];
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extern const char g_spiincompleteparam[];
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extern const char g_spicmdnotfound[];
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extern const char g_spitoomanyargs[];
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extern const char g_spicmdfailed[];
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extern const char g_spixfrerror[];
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/****************************************************************************
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* Public Function Prototypes
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****************************************************************************/
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/* Message handler */
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ssize_t spitool_exchange(FAR struct spitool_s *spitool,
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FAR const void *outbuffer, size_t noutbytes,
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FAR void *inbuffer, size_t ninbytes);
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int spitool_printf(FAR struct spitool_s *spitool, const char *fmt, ...)
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printflike(2, 3);
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void spitool_flush(FAR struct spitool_s *spitool);
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/* Command handlers */
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int spicmd_bus(FAR struct spitool_s *spitool, int argc, FAR char **argv);
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int spicmd_exch(FAR struct spitool_s *spitool, int argc, FAR char **argv);
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/* Common logic */
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int spitool_common_args(FAR struct spitool_s *spitool, FAR char **arg);
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/* Driver access utilities */
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FAR char *spidev_path(int bus);
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bool spidev_exists(int bus);
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int spidev_open(int bus);
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int spidev_transfer(int fd, FAR struct spi_sequence_s *seq);
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#endif /* __APPS_SYSTEM_SPI_SPITOOLS_H */
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