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author | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2012-05-05 17:27:03 +0000 |
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committer | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2012-05-05 17:27:03 +0000 |
commit | fffb5bd4f05cf422e06f650f4d13b40fe9675463 (patch) | |
tree | 9577ae1a5cdf524bd9c355f4a5bd286be9268d5e /nuttx/drivers | |
parent | 1f003cf9e6a6318af036b8d1df70aa4d64ea6d05 (diff) | |
download | px4-nuttx-fffb5bd4f05cf422e06f650f4d13b40fe9675463.tar.gz px4-nuttx-fffb5bd4f05cf422e06f650f4d13b40fe9675463.tar.bz2 px4-nuttx-fffb5bd4f05cf422e06f650f4d13b40fe9675463.zip |
Beginning of an SMTPE11 touchscreen/IO expander driver
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@4700 42af7a65-404d-4744-a932-0658087f49c3
Diffstat (limited to 'nuttx/drivers')
-rw-r--r-- | nuttx/drivers/input/Make.defs | 4 | ||||
-rw-r--r-- | nuttx/drivers/input/stmpe11.h | 127 | ||||
-rw-r--r-- | nuttx/drivers/input/stmpe11_base.c | 366 |
3 files changed, 487 insertions, 10 deletions
diff --git a/nuttx/drivers/input/Make.defs b/nuttx/drivers/input/Make.defs index e32dc4549..ff01217cb 100644 --- a/nuttx/drivers/input/Make.defs +++ b/nuttx/drivers/input/Make.defs @@ -47,6 +47,10 @@ ifeq ($(CONFIG_INPUT_ADS7843E),y) CSRCS += ads7843e.c endif +ifeq ($(CONFIG_INPUT_STMPE11),y) + CSRCS += stmpe11_base.c +endif + # Include input device driver build support DEPPATH += --dep-path input diff --git a/nuttx/drivers/input/stmpe11.h b/nuttx/drivers/input/stmpe11.h index c02cff488..1ab347191 100644 --- a/nuttx/drivers/input/stmpe11.h +++ b/nuttx/drivers/input/stmpe11.h @@ -44,28 +44,135 @@ * Included Files ********************************************************************************************/ +#include <nuttx/config.h> + +#include <semaphore.h> + +#include <nuttx/wqueue.h> +#include <nuttx/input/stmpe11.h> + +#if defined(CONFIG_INPUT) && defined(CONFIG_INPUT_STMPE11) + /******************************************************************************************** * Pre-Processor Definitions ********************************************************************************************/ +/* Configuration ****************************************************************************/ +/* Reference counting is partially implemented, but not needed in the current design. + */ + +#undef CONFIG_STMPE11_REFCNT + +/* No support for the SPI interface yet */ + +#ifdef CONFIG_STMPE11_SPI +# error "Only the STMPE11 I2C interface is supported by this driver" +#endif + +/* Driver support ***************************************************************************/ +/* This format is used to construct the /dev/input[n] device driver path. It defined here + * so that it will be used consistently in all places. + */ + +#define DEV_FORMAT "/dev/input%d" +#define DEV_NAMELEN 16 /******************************************************************************************** * Public Types ********************************************************************************************/ +/* This describes the state of one contact */ -/******************************************************************************************** - * Public Function Prototypes - ********************************************************************************************/ +enum stmpe11_contact_3 +{ + CONTACT_NONE = 0, /* No contact */ + CONTACT_DOWN, /* First contact */ + CONTACT_MOVE, /* Same contact, possibly different position */ + CONTACT_UP, /* Contact lost */ +}; + +/* This structure describes the results of one STMPE11 sample */ -#ifdef __cplusplus -#define EXTERN extern "C" -extern "C" { +struct stmpe11_sample_s +{ + uint8_t id; /* Sampled touch point ID */ + uint8_t contact; /* Contact state (see enum stmpe11_contact_e) */ + uint16_t x; /* Measured X position */ + uint16_t y; /* Measured Y position */ + uint16_t z; /* Measured Z position */ +}; + +/* This structure represents the state of the SMTPE11 driver */ + +struct stmpe11_dev_s +{ +#ifdef CONFIG_STMPE11_MULTIPLE + FAR struct stmpe11_dev_s *flink; /* Supports a singly linked list of drivers */ +#endif +#ifdef CONFIG_STMPE11_REFCNT + uint8_t crefs; /* Number of times the device has been opened */ +#endif + uint8_t nwaiters; /* Number of threads waiting for STMPE11 data */ + uint8_t inuse; /* SMTPE11 pins in use */ + uint8_t id; /* Current touch point ID (TSC only) */ + uint8_t minor; /* Touchscreen minor device number (TSC only) */ + volatile bool penchange; /* An unreported event is buffered (TSC only) */ + sem_t devsem; /* Manages exclusive access to this structure */ + sem_t waitsem; /* Used to wait for the availability of data */ + uint32_t threshx; /* Thresholded X value (TSC only) */ + uint32_t threshy; /* Thresholded Y value (TSC only) */ + +#ifdef CONFIG_STMPE11_SPI + FAR struct spi_dev_s *spi; /* Saved SPI driver instance */ #else -#define EXTERN extern + FAR struct i2c_dev_s *i2c; /* Saved I2C driver instance */ #endif -#undef EXTERN -#ifdef __cplusplus -} + FAR struct stmpe11_config_s *config; /* Board configuration data (TSC only) */ + struct work_s work; /* Supports the interrupt handling "bottom half" */ + struct stmpe11_sample_s sample; /* Last sampled touch point data (TSC only) */ + + /* The following is a list if poll structures of threads waiting for + * driver events. The 'struct pollfd' reference for each open is also + * retained in the f_priv field of the 'struct file'. + */ + +#ifndef CONFIG_DISABLE_POLL + struct pollfd *fds[CONFIG_STMPE11_NPOLLWAITERS]; #endif +}; + +/******************************************************************************************** + * Public Function Prototypes + ********************************************************************************************/ + +/******************************************************************************************** + * Name: stmpe11_getreg8 + * + * Description: + * Read from an 8-bit STMPE11 register + * + ********************************************************************************************/ + +static uint8_t stmpe11_getreg8(FAR struct stmpe11_dev_s *priv, uint8_t regaddr); + +/******************************************************************************************** + * Name: stmpe11_putreg8 + * + * Description: + * Write a value to an 8-bit STMPE11 register + * + ********************************************************************************************/ + +void stmpe11_putreg8(FAR struct stmpe11_dev_s *priv, uint8_t regaddr, uint8_t regval); + +/******************************************************************************************** + * Name: stmpe11_getreg16 + * + * Description: + * Read 16-bits of data from an STMPE-11 register + * + ********************************************************************************************/ + +uint16_t stmpe11_getreg16(FAR struct stmpe11_dev_s *priv, uint8_t regaddr); +#endif /* CONFIG_INPUT && CONFIG_INPUT_STMPE11 */ #endif /* __DRIVERS_INPUT_STMPE11_H */ diff --git a/nuttx/drivers/input/stmpe11_base.c b/nuttx/drivers/input/stmpe11_base.c new file mode 100644 index 000000000..25f6a1e81 --- /dev/null +++ b/nuttx/drivers/input/stmpe11_base.c @@ -0,0 +1,366 @@ +/**************************************************************************** + * drivers/input/stmpe11_base.c + * + * Copyright (C) 2012 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <gnutt@nuttx.org> + * + * References: + * "STMPE811 S-Touch® advanced resistive touchscreen controller with 8-bit + * GPIO expander," Doc ID 14489 Rev 6, CD00186725, STMicroelectronics" + * + * 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 <errno.h> +#include <debug.h> + +#include <nuttx/arch.h> +#include <nuttx/input/stmpe11.h> + +#include "stmpe11.h" + +#if defined(CONFIG_INPUT) && defined(CONFIG_INPUT_STMPE11) + +/**************************************************************************** + * Private Types + ****************************************************************************/ + +/**************************************************************************** + * Private Data + ****************************************************************************/ + +/* If only a single STMPE11 device is supported, then the driver state + * structure may as well be pre-allocated. + */ + +#ifndef CONFIG_STMPE11_MULTIPLE +static struct stmpe11_dev_s g_stmpe11; + +/* Otherwise, we will need to maintain allocated driver instances in a list */ + +#else +static struct stmpe11_dev_s *g_stmpe11list; +#endif + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: stmpe11_checkid + * + * Description: + * Read and verify the STMPE11 chip ID + * + ****************************************************************************/ + +static int stmpe11_checkid(FAR struct stmpe11_dev_s *priv) +{ + uint16_t devid = 0; + + /* Read device ID */ + + devid = stmpe11_getreg8(priv, STMPE11_CHIP_ID); + devid = (uint32_t)(devid << 8); + devid |= (uint32_t)stmpe11_getreg8(priv, STMPE11_CHIP_ID+1); + ivdbg("devid: %04x\n", devid); + + if (devid != (uint16_t)CHIP_ID) + { + /* ID is not Correct */ + + return -ENODEV; + } + + return OK; +} + +/**************************************************************************** + * Name: stmpe11_reset + * + * Description: + * Reset the STMPE11 + * + ****************************************************************************/ + +static void stmpe11_reset(FAR struct stmpe11_dev_s *priv) +{ + /* Power Down the STMPE11 */ + + stmpe11_putreg8(priv, STMPE11_SYS_CTRL1, SYS_CTRL1_SOFTRESET); + + /* Wait a bit */ + + up_mdelay(20); + + /* Then power on again. All registers will be in their reset state. */ + + stmpe11_putreg8(priv, STMPE11_SYS_CTRL1, 0); +} + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: stmpe11_instantiate + * + * Description: + * Instantiate and configure the STMPE11 device driver to use the provided + * I2C or SPIdevice instance. + * + * Input Parameters: + * dev - An I2C or SPI driver instance + * config - Persistant board configuration data + * + * Returned Value: + * A non-zero handle is returned on success. This handle may then be used + * to configure the STMPE11 driver as necessary. A NULL handle value is + * returned on failure. + * + ****************************************************************************/ + +#ifdef CONFIG_STMPE11_SPI +STMPE11_HANDLE stmpe11_instantiate(FAR struct spi_dev_s *dev, + FAR struct stmpe11_config_s *config) +#else +STMPE11_HANDLE stmpe11_instantiate(FAR struct i2c_dev_s *dev, + FAR struct stmpe11_config_s *config) +#endif +{ + FAR struct stmpe11_dev_s *priv; + int ret; + + /* On entry the following is assumed: + * + * I2C initialization ready + * GPIO pins already configured. + */ + + /* Allocate the device state structure */ + +#ifdef CONFIG_STMPE11_MULTIPLE + priv = (FAR struct stmpe11_dev_s *)kzalloc(sizeof(struct stmpe11_dev_s)); + if (!priv) + { + return -ENOMEM; + } + + /* And save the device structure in the list of STMPE11 so that we can find it later */ + + priv->flink = g_stmpe11list; + g_stmpe11list = priv; +#else + + /* Use the one-and-only STMPE11 driver instance */ + + priv = &g_stmpe11; +#endif + + /* Initialize the device state structure */ + +#ifdef CONFIG_STMPE11_SPI + priv->spi = dev; +#else + priv->i2c = dev; +#endif + + /* Read and verify the STMPE11 chip ID */ + + ret = stmpe11_checkid(priv); + if (ret < 0) + { +#ifdef CONFIG_STMPE11_MULTIPLE + kfree(priv); +#endif + return NULL; + } + + /* Generate STMPE11 Software reset */ + + stmpe11_reset(priv); + return (STMPE11_HANDLE)priv; +} + +/**************************************************************************** + * Name: stmpe11_getreg8 + * + * Description: + * Read from an 8-bit STMPE11 register + * + ****************************************************************************/ + +#ifdef CONFIG_STMPE11_I2C +uint8_t stmpe11_getreg8(FAR struct stmpe11_dev_s *priv, uint8_t regaddr) +{ + /* 8-bit data read sequence: + * + * Start - I2C_Write_Address - STMPE11_Reg_Address - + * Repeated_Start - I2C_Read_Address - STMPE11_Read_Data - STOP + */ + + struct i2c_msg_s msg[2]; + uint8_t regval; + int ret; + + /* Setup 8-bit STMPE11 address write message */ + + msg[0].addr = priv->config->address; /* 7-bit address */ + msg[0].flags = 0; /* Write transaction, beginning with START */ + msg[0].buffer = ®addr; /* Transfer from this address */ + msg[0].length = 1; /* Send one byte following the address + * (no STOP) */ + + /* Set up the 8-bit STMPE11 data read message */ + + msg[1].addr = priv->config->address; /* 7-bit address */ + msg[1].flags = I2C_M_READ; /* Read transaction, beginning with Re-START */ + msg[1].buffer = ®val; /* Transfer to this address */ + msg[1].length = 1; /* Receive one byte following the address + * (then STOP) */ + + /* Perform the transfer */ + + ret = I2C_TRANSFER(priv->i2c, msg, 2); + if (ret < 0) + { + idbg("I2C_TRANSFER failed: %d\n", ret); + return 0; + } + + return regval; +} +#endif + +/**************************************************************************** + * Name: stmpe11_putreg8 + * + * Description: + * Write a value to an 8-bit STMPE11 register + * + ****************************************************************************/ + +#ifdef CONFIG_STMPE11_I2C +void stmpe11_putreg8(FAR struct stmpe11_dev_s *priv, + uint8_t regaddr, uint8_t regval) +{ + /* 8-bit data read sequence: + * + * Start - I2C_Write_Address - STMPE11_Reg_Address - STMPE11_Write_Data - STOP + */ + + struct i2c_msg_s msg; + uint8_t txbuffer[2]; + int ret; + + /* Setup to the data to be transferred. Two bytes: The STMPE11 register + * address followed by one byte of data. + */ + + txbuffer[0] = regaddr; + txbuffer[1] = regval; + + /* Setup 8-bit STMPE11 address write message */ + + msg.addr = priv->config->address; /* 7-bit address */ + msg.flags = 0; /* Write transaction, beginning with START */ + msg.buffer = txbuffer; /* Transfer from this address */ + msg.length = 2; /* Send two byte following the address + * (then STOP) */ + + /* Perform the transfer */ + + ret = I2C_TRANSFER(priv->i2c, &msg, 1); + if (ret < 0) + { + idbg("I2C_TRANSFER failed: %d\n", ret); + } +} +#endif + +/**************************************************************************** + * Name: stmpe11_getreg16 + * + * Description: + * Read 16-bits of data from an STMPE-11 register + * + ****************************************************************************/ + +#ifdef CONFIG_STMPE11_I2C +uint16_t stmpe11_getreg16(FAR struct stmpe11_dev_s *priv, uint8_t regaddr) +{ + /* 16-bit data read sequence: + * + * Start - I2C_Write_Address - STMPE11_Reg_Address - + * Repeated_Start - I2C_Read_Address - STMPE11_Read_Data_1 - + * STMPE11_Read_Data_2 - STOP + */ + + + struct i2c_msg_s msg[2]; + uint8_t rxbuffer[2]; + int ret; + + /* Setup 8-bit STMPE11 address write message */ + + msg[0].addr = priv->config->address; /* 7-bit address */ + msg[0].flags = 0; /* Write transaction, beginning with START */ + msg[0].buffer = ®addr; /* Transfer from this address */ + msg[0].length = 1; /* Send one byte following the address + * (no STOP) */ + + /* Set up the 8-bit STMPE11 data read message */ + + msg[1].addr = priv->config->address; /* 7-bit address */ + msg[1].flags = I2C_M_READ; /* Read transaction, beginning with Re-START */ + msg[1].buffer = rxbuffer; /* Transfer to this address */ + msg[1].length = 2; /* Receive two bytes following the address + * (then STOP) */ + + /* Perform the transfer */ + + ret = I2C_TRANSFER(priv->i2c, msg, 2); + if (ret < 0) + { + idbg("I2C_TRANSFER failed: %d\n", ret); + return 0; + } + + return (uint16_t)rxbuffer[0] << 16 | (uint16_t)rxbuffer[1]; +} +#endif + +#endif /* CONFIG_INPUT && CONFIG_INPUT_STMPE11 */ + |