drivers/ft5x06: Add a polled mode of operation for the FT5x06 in attempt to work around the fact that the LPCXpresso-LPC54628 chose a non-interrupt pin for the FT5x06 interrupt. Driver is still not yet functional.
This commit is contained in:
Gregory Nutt
parent
783d2cabee
commit
23dfc0bf06
6 changed files with 218 additions and 23 deletions
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@ -63,10 +63,14 @@ STATUS
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system asserts during boot up. This is because the FT5x06 interrupt
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is on pin P4.0 but pin interrupts are only supported on P0.m and
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P1.m, m=0..31. Does this mean that TSC interrupts are not supported?
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I think so! I think that a polled solution will have to be used.
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I think so!
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2017-12-18: Added an option to the FT5x06 driver to support a timer-
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based poll instead of interrupts. This is very inefficient in that it
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will introduce delays in touchscreen response and will consume more CPU
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bandwidth.
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If you want to use the fb configuration in the near future, you should
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disable CONFIG_INPUT_FT5x06 to prevent this assertion.
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The FT5x06 driver is not, however, functional. It is generating hard
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faults.
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Configurations
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==============
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@ -154,6 +158,29 @@ Configurations
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is not yet usable. Others work fine with no user include: charset,
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xmas, firework, worms, rain, for examples.
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3. I2C2 is enabled (will be used with the capacitive touchscreen). In
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order to verify I2C functionality, the I2C tool at apps/system/i2ctool
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is enabled in this configuration.
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nsh> i2c dev -b 2 3 77
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0 1 2 3 4 5 6 7 8 9 a b c d e f
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00: -- -- -- -- -- -- -- -- -- -- -- -- --
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10: -- -- -- -- -- -- -- -- -- -- 1a -- -- 1d -- --
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20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
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30: -- -- -- -- -- -- -- -- 38 -- -- -- -- -- -- --
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40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
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50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
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60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
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70: -- -- -- -- -- -- -- --
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Codec I2C address: 0x1a
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Accel I2C address: 0x1d
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Touch panel I2C address: 0x38
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4. The touchscreen test program at apps/examples/touchscreen is also
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included in this configuration. As of this writing, touchscreen
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is not yet functional, however.
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nsh:
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Configures the NuttShell (nsh) application located at examples/nsh.
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@ -17,6 +17,7 @@ CONFIG_FAT_LCNAMES=y
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CONFIG_FAT_LFN=y
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CONFIG_FS_FAT=y
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CONFIG_FS_PROCFS=y
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CONFIG_FT5X06_POLLMODE=y
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CONFIG_GRAPHICS_PDCURSES=y
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CONFIG_I2CTOOL_MAXBUS=9
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CONFIG_INPUT_FT5X06=y
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@ -62,11 +62,14 @@
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* Private Function Ptototypes
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****************************************************************************/
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#ifndef CONFIG_FT5X06_POLLMODE
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static int lpc54_ft5x06_attach(FAR const struct ft5x06_config_s *config,
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xcpt_t isr, FAR void *arg);
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static void lpc54_ft5x06_enable(FAR const struct ft5x06_config_s *config,
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bool enable);
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static void lpc54_ft5x06_clear(FAR const struct ft5x06_config_s *config);
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#endif
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static void lpc54_ft5x06_wakeup(FAR const struct ft5x06_config_s *config);
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static void lpc54_ft5x06_nreset(FAR const struct ft5x06_config_s *config,
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bool state);
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@ -79,14 +82,18 @@ static const struct ft5x06_config_s g_ft5x06_config =
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{
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.address = FT5x06_I2C_ADDRESS,
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.frequency = FT5x06_FREQUENCY,
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#ifndef CONFIG_FT5X06_POLLMODE
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.attach = lpc54_ft5x06_attach,
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.enable = lpc54_ft5x06_enable,
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.clear = lpc54_ft5x06_clear,
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#endif
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.wakeup = lpc54_ft5x06_wakeup,
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.nreset = lpc54_ft5x06_nreset
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};
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#ifndef CONFIG_FT5X06_POLLMODE
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static uint8_t g_ft5x06_irq;
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#endif
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/****************************************************************************
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* Private Functions
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@ -100,11 +107,13 @@ static uint8_t g_ft5x06_irq;
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*
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****************************************************************************/
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#ifndef CONFIG_FT5X06_POLLMODE
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static int lpc54_ft5x06_attach(FAR const struct ft5x06_config_s *config,
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xcpt_t isr, FAR void *arg)
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{
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return irq_attach(g_ft5x06_irq, isr, arg);
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}
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#endif
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/****************************************************************************
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* Name: lpc54_ft5x06_enable
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@ -114,6 +123,7 @@ static int lpc54_ft5x06_attach(FAR const struct ft5x06_config_s *config,
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*
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****************************************************************************/
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#ifndef CONFIG_FT5X06_POLLMODE
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static void lpc54_ft5x06_enable(FAR const struct ft5x06_config_s *config,
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bool enable)
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{
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@ -126,6 +136,7 @@ static void lpc54_ft5x06_enable(FAR const struct ft5x06_config_s *config,
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up_disable_irq(g_ft5x06_irq);
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}
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}
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#endif
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/****************************************************************************
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* Name: lpc54_ft5x06_clear
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@ -135,10 +146,12 @@ static void lpc54_ft5x06_enable(FAR const struct ft5x06_config_s *config,
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*
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****************************************************************************/
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#ifndef CONFIG_FT5X06_POLLMODE
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static void lpc54_ft5x06_clear(FAR const struct ft5x06_config_s *config)
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{
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(void)lpc54_gpio_ackedge(g_ft5x06_irq);
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}
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#endif
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/****************************************************************************
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* Name: lpc54_ft5x06_wakeup
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@ -183,9 +196,11 @@ static void lpc54_ft5x06_nreset(FAR const struct ft5x06_config_s *config,
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int lpc54_ft5x06_register(void)
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{
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FAR struct i2c_master_s *i2c;
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int irq;
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int ret;
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#ifndef CONFIG_FT5X06_POLLMODE
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int irq;
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/* Initialize GPIO pins. NOTE: The nRST pin was already configured during
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* early LCD initialization. The Part is in reset now.
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*/
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@ -199,6 +214,7 @@ int lpc54_ft5x06_register(void)
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lpc54_gpio_ackedge(irq);
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up_disable_irq(irq);
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#endif
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/* Take the FT5x06 out of reset */
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@ -75,13 +75,28 @@ config INPUT_FT5336
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Enable support for the FocalTech FT5x06 multi-touch, capacitive
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touch panel controller
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if INPUT_FT5X06
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config FT5X06_POLLMODE
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bool " FT5336/FT5x06 polled mode"
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default n
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---help---
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Run the FT5x06 in a non-interrupt driven polled mode. Events will
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not be driven by interrupts but rather based on a timed poll.
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This is a non-optimal design both because (1) it will lead to delays
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in detecting touch related events and (2) it will consume a
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significant amount of CPU time to perform the polling.
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config FT5X06_NPOLLWAITERS
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int "Number FT5336/FT5x06 poll waiters"
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default 4
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depends on !DISABLE_POLL && INPUT_FT5X06
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depends on !DISABLE_POLL
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---help---
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Maximum number of threads that can be waiting on poll()
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endif # INPUT_FT5X06
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config INPUT_ADS7843E
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bool "TI ADS7843/TSC2046 touchscreen controller"
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default n
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@ -78,9 +78,8 @@
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#include <nuttx/fs/fs.h>
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#include <nuttx/i2c/i2c_master.h>
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#include <nuttx/wqueue.h>
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#include <nuttx/random.h>
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#include <nuttx/wdog.h>
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#include <nuttx/signal.h>
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#include <nuttx/input/touchscreen.h>
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#include <nuttx/input/ft5x06.h>
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@ -95,8 +94,17 @@
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* defined here so that it will be used consistently in all places.
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*/
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#define DEV_FORMAT "/dev/input%d"
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#define DEV_NAMELEN 16
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#define DEV_FORMAT "/dev/input%d"
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#define DEV_NAMELEN 16
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/* In polled mode, the polling rate will decrease when there is no touch
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* activity. These definitions represent the maximum and the minimum
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* polling rates.
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*/
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#define POLL_MINDELAY MSEC2TICK(50)
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#define POLL_MAXDELAY MSEC2TICK(200)
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#define POLL_INCREMENT MSEC2TICK(10)
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/****************************************************************************
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* Private Types
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@ -117,11 +125,17 @@ struct ft5x06_dev_s
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sem_t waitsem; /* Used to wait for the
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* availability of data */
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uint32_t frequency; /* Current I2C frequency */
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#ifdef CONFIG_FT5X06_POLLMODE
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uint32_t delay; /* Current poll delay */
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#endif
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FAR const struct ft5x06_config_s *config; /* Board configuration data */
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FAR struct i2c_master_s *i2c; /* Saved I2C driver instance */
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struct work_s work; /* Supports the interrupt handling
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* "bottom half" */
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#ifdef CONFIG_FT5X06_POLLMODE
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WDOG_ID polltimer; /* Poll timer */
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#endif
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uint8_t touchbuf[FT5x06_TOUCH_DATA_LEN]; /* Raw touch data */
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#ifndef CONFIG_DISABLE_POLL
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@ -140,7 +154,11 @@ struct ft5x06_dev_s
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static void ft5x06_notify(FAR struct ft5x06_dev_s *priv);
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static void ft5x06_data_worker(FAR void *arg);
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#ifdef CONFIG_FT5X06_POLLMODE
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static void ft5x06_poll_timeout(int argc, wdparm_t arg1, ...);
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#else
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static int ft5x06_data_interrupt(int irq, FAR void *context, FAR void *arg);
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#endif
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static ssize_t ft5x06_sample(FAR struct ft5x06_dev_s *priv, FAR char *buffer,
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size_t len);
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static ssize_t ft5x06_waitsample(FAR struct ft5x06_dev_s *priv,
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@ -248,8 +266,10 @@ static void ft5x06_data_worker(FAR void *arg)
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{
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FAR struct ft5x06_dev_s *priv = (FAR struct ft5x06_dev_s *)arg;
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FAR const struct ft5x06_config_s *config;
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FAR struct ft5x06_touch_data_s *sample;
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struct i2c_msg_s msg[2];
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uint8_t regaddr;
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uint8_t ntouches;
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int ret;
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/* Get a pointer the callbacks for convenience */
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@ -281,32 +301,92 @@ static void ft5x06_data_worker(FAR void *arg)
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/* Set up the data read operation */
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msg[0].frequency = priv->frequency; /* I2C frequency */
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msg[0].addr = config->address; /* 7-bit address */
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msg[0].flags = I2C_M_READ; /* Read transaction with Re-START */
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msg[0].buffer = priv->touchbuf; /* Read all touch data */
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msg[0].length = FT5x06_TOUCH_DATA_LEN;
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msg[1].frequency = priv->frequency; /* I2C frequency */
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msg[1].addr = config->address; /* 7-bit address */
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msg[1].flags = I2C_M_READ; /* Read transaction with Re-START */
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msg[1].buffer = priv->touchbuf; /* Read all touch data */
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msg[1].length = FT5x06_TOUCH_DATA_LEN;
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ret = I2C_TRANSFER(priv->i2c, msg, 2);
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if (ret >= 0)
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sample = (FAR struct ft5x06_touch_data_s *)priv->touchbuf;
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ntouches = sample->tdstatus;
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if (ret >= 0 && ntouches > 0)
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{
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/* Notify any waiters that new FT5x06 data is available */
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priv->valid = true;
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ft5x06_notify(priv);
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}
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#ifdef CONFIG_FT5X06_POLLMODE
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else
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{
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ntouches = 0;
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}
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/* Update the poll rate */
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if (ntouches > 0)
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{
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priv->delay = POLL_MINDELAY;
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}
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else if (priv->delay < POLL_MAXDELAY)
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{
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priv->delay += POLL_INCREMENT;
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}
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/* Exit, re-starting the poll (unless there is no longer any task waiting
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* for touch data).
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*/
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if (priv->nwaiters > 0)
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{
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(void)wd_start(priv->polltimer, priv->delay, ft5x06_poll_timeout, 1,
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priv);
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}
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#else
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/* Exit, re-enabling FT5x06 interrupts */
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config->enable(config, true);
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#endif
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nxsem_post(&priv->devsem);
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}
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/****************************************************************************
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* Name: ft5x06_poll_timeout
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****************************************************************************/
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#ifdef CONFIG_FT5X06_POLLMODE
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static void ft5x06_poll_timeout(int argc, wdparm_t arg1, ...)
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{
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FAR struct ft5x06_dev_s *priv = (FAR struct ft5x06_dev_s *)arg1;
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int ret;
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/* Transfer processing to the worker thread. Since FT5x06 poll timer is
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* disabled while the work is pending, no special action should be
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* required to protected the work queue.
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*/
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if (priv->nwaiters > 0)
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{
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DEBUGASSERT(priv->work.worker == NULL);
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ret = work_queue(HPWORK, &priv->work, ft5x06_data_worker, priv, 0);
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if (ret != 0)
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{
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ierr("ERROR: Failed to queue work: %d\n", ret);
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}
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}
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}
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#endif
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/****************************************************************************
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* Name: ft5x06_data_interrupt
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****************************************************************************/
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#ifndef CONFIG_FT5X06_POLLMODE
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static int ft5x06_data_interrupt(int irq, FAR void *context, FAR void *arg)
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{
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FAR struct ft5x06_dev_s *priv = (FAR struct ft5x06_dev_s *)arg;
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@ -341,6 +421,7 @@ static int ft5x06_data_interrupt(int irq, FAR void *context, FAR void *arg)
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config->clear(config);
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return OK;
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}
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#endif
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/****************************************************************************
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* Name: ft5x06_sample
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@ -442,9 +523,31 @@ static ssize_t ft5x06_waitsample(FAR struct ft5x06_dev_s *priv,
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while (!priv->valid)
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{
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/* Wait for a change in the FT5x06 state */
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/* Increment the count of waiters */
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priv->nwaiters++;
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#ifdef CONFIG_FT5X06_POLLMODE
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/* The poll timer is stopped when there are no waiters. So we may
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* need to restart with at the maximum rate.
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*/
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if (priv->nwaiters == 1)
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{
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priv->delay = POLL_MINDELAY;
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ret = wd_start(priv->polltimer, priv->delay, ft5x06_poll_timeout,
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1, priv);
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if (ret < 0)
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{
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ierr("ERROR: nxsem_wait failed: %d\n", ret);
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goto errout;
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}
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}
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#endif
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/* Wait for a change in the FT5x06 state */
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ret = nxsem_wait(&priv->waitsem);
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priv->nwaiters--;
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@ -523,10 +626,12 @@ static int ft5x06_bringup(FAR struct ft5x06_dev_s *priv)
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return ret;
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}
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#ifndef CONFIG_FT5X06_POLLMODE
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/* Enable FT5x06 interrupts */
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config->clear(config);
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config->enable(config, true);
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#endif
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return OK;
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}
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@ -536,6 +641,12 @@ static int ft5x06_bringup(FAR struct ft5x06_dev_s *priv)
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static void ft5x06_shutdown(FAR struct ft5x06_dev_s *priv)
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{
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#ifdef CONFIG_FT5X06_POLLMODE
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/* Stop the poll timer */
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(void)wd_cancel(priv->polltimer);
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#else
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FAR const struct ft5x06_config_s *config = priv->config;
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/* Make sure that the FT5x06 interrupt is disabled */
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@ -546,6 +657,7 @@ static void ft5x06_shutdown(FAR struct ft5x06_dev_s *priv)
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/* Attach the interrupt handler */
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(void)config->attach(config, NULL, NULL);
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#endif
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}
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/****************************************************************************
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@ -597,7 +709,7 @@ static int ft5x06_open(FAR struct file *filep)
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ret = ft5x06_bringup(priv);
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if (ret < 0)
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{
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ierr("ERROR: nxsem_wait failed: %d\n", ret);
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ierr("ERROR: ft5x06_bringup failed: %d\n", ret);
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goto errout_with_sem;
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}
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}
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@ -929,8 +1041,13 @@ int ft5x06_register(FAR struct i2c_master_s *i2c,
|
|||
/* Debug-only sanity checks */
|
||||
|
||||
DEBUGASSERT(i2c != NULL && config != NULL && minor >= 0 && minor < 100);
|
||||
DEBUGASSERT(config->attach != NULL && config->enable != NULL &&
|
||||
config->clear != NULL && config->nreset != NULL);
|
||||
#ifdef CONFIG_FT5X06_POLLMODE
|
||||
DEBUGASSERT(config->wakeup != NULL && config->nreset != NULL);
|
||||
#else
|
||||
DEBUGASSERT(config->attach != NULL && config->enable != NULL &&
|
||||
config->clear != NULL && config->wakeup != NULL &&
|
||||
config->nreset != NULL);
|
||||
#endif
|
||||
|
||||
/* Create and initialize a FT5x06 device driver instance */
|
||||
|
||||
|
|
@ -956,6 +1073,17 @@ int ft5x06_register(FAR struct i2c_master_s *i2c,
|
|||
|
||||
nxsem_setprotocol(&priv->waitsem, SEM_PRIO_NONE);
|
||||
|
||||
#ifdef CONFIG_FT5X06_POLLMODE
|
||||
/* Allocate a timer for polling the FT5x06 */
|
||||
|
||||
priv->delay = POLL_MAXDELAY;
|
||||
priv->polltimer = wd_create();
|
||||
if (priv->polltimer == NULL)
|
||||
{
|
||||
ierr("ERROR: Failed to allocate polltimer\n");
|
||||
goto errout_with_priv;
|
||||
}
|
||||
#else
|
||||
/* Make sure that the FT5x06 interrupt interrupt is disabled */
|
||||
|
||||
config->clear(config);
|
||||
|
|
@ -968,8 +1096,9 @@ int ft5x06_register(FAR struct i2c_master_s *i2c,
|
|||
if (ret < 0)
|
||||
{
|
||||
ierr("ERROR: Failed to attach interrupt\n");
|
||||
goto errout_with_priv;
|
||||
goto errout_with_timer;
|
||||
}
|
||||
#endif
|
||||
|
||||
/* Register the device as an input device */
|
||||
|
||||
|
|
@ -980,7 +1109,7 @@ int ft5x06_register(FAR struct i2c_master_s *i2c,
|
|||
if (ret < 0)
|
||||
{
|
||||
ierr("ERROR: register_driver() failed: %d\n", ret);
|
||||
goto errout_with_priv;
|
||||
goto errout_with_timer;
|
||||
}
|
||||
|
||||
/* Schedule work to perform the initial sampling and to set the data
|
||||
|
|
@ -991,13 +1120,18 @@ int ft5x06_register(FAR struct i2c_master_s *i2c,
|
|||
if (ret != 0)
|
||||
{
|
||||
ierr("ERROR: Failed to queue work: %d\n", ret);
|
||||
goto errout_with_priv;
|
||||
goto errout_with_timer;
|
||||
}
|
||||
|
||||
/* And return success */
|
||||
|
||||
return OK;
|
||||
|
||||
errout_with_timer:
|
||||
#ifdef CONFIG_FT5X06_POLLMODE
|
||||
(void)wd_delete(priv->polltimer);
|
||||
#endif
|
||||
|
||||
errout_with_priv:
|
||||
nxsem_destroy(&priv->devsem);
|
||||
kmm_free(priv);
|
||||
|
|
|
|||
|
|
@ -116,10 +116,12 @@ struct ft5x06_config_s
|
|||
|
||||
*/
|
||||
|
||||
#ifndef CONFIG_FT5X06_POLLMODE
|
||||
int (*attach)(FAR const struct ft5x06_config_s *config, xcpt_t isr,
|
||||
FAR void *arg);
|
||||
void (*enable)(FAR const struct ft5x06_config_s *config, bool enable);
|
||||
void (*clear)(FAR const struct ft5x06_config_s *config);
|
||||
#endif
|
||||
void (*wakeup)(FAR const struct ft5x06_config_s *config);
|
||||
void (*nreset)(FAR const struct ft5x06_config_s *config,
|
||||
bool state);
|
||||
|
|
|
|||
Loading…
Add table
Reference in a new issue