TTP223: Adding C source

Signed-off-by: Abhishek Malik <abhishek.malik@intel.com>

src/ttp223/CMakeLists.txt

@@ -1,5 +1,9 @@
-set (libname "ttp223")
-set (libdescription "upm ttp223")
-set (module_src ${libname}.cxx)
-set (module_hpp ${libname}.hpp)
-upm_module_init()
+upm_mixed_module_init (NAME ttp223
+    DESCRIPTION "upm ttp223 touch sensor module"
+    C_HDR ttp223.h
+    C_SRC ttp223.c
+    CPP_HDR ttp223.hpp
+    CPP_SRC ttp223.cxx
+    FTI_SRC ttp223_fti.c
+    CPP_WRAPS_C
+    REQUIRES libmraa)

src/ttp223/ttp223.c

@@ -0,0 +1,80 @@
+/*
+ * Author: Sarah Knepper <sarah.knepper@intel.com>
+ *         Abhishek Malik <abhishek.malik@intel.com>
+ * Copyright (c) 2015 Intel Corporation.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#include "ttp223.h"
+
+ttp223_context ttp223_init(int pin){
+    ttp223_context dev = 
+      (ttp223_context) malloc(sizeof(struct _ttp223_context));
+
+    if (dev == NULL) {
+        printf("Unable to allocate space for the sensor struct\n");
+        return NULL;
+    }
+
+    dev->gpio_pin = pin;
+
+    dev->gpio = mraa_gpio_init(dev->gpio_pin);
+    mraa_gpio_dir(dev->gpio, MRAA_GPIO_IN);
+    dev->isr_installed = false;
+
+    return dev;
+}
+
+void ttp223_close(ttp223_context dev){
+  mraa_gpio_close(dev->gpio);
+  free(dev);
+}
+
+upm_result_t ttp223_is_pressed(ttp223_context dev, bool* value) {
+    int ret = mraa_gpio_read(dev->gpio);
+
+    if (ret > 0)
+        *value = true;
+    else
+        *value = false;
+
+    return UPM_SUCCESS;
+}
+
+upm_result_t upm_ttp223_install_isr(ttp223_context dev,
+                                    mraa_gpio_edge_t edge_level,
+                                    void (*isr)(void *), void *arg){
+    ttp223_uninstall_isr(dev);
+
+    mraa_gpio_isr(dev->gpio, edge_level, isr, arg);
+    dev->isr_installed = true;
+
+    return UPM_SUCCESS;
+}
+
+upm_result_t ttp223_uninstall_isr(ttp223_context dev){
+    if (dev->isr_installed)
+        mraa_gpio_isr_exit(dev->gpio);
+
+    dev->isr_installed = false;
+
+    return UPM_SUCCESS;
+}

src/ttp223/ttp223.h

@@ -0,0 +1,81 @@
+/*
+ * Author: Sarah Knepper <sarah.knepper@intel.com>
+ *         Abhishek Malik <abhishek.malik@intel.com>
+ * Copyright (c) 2015 Intel Corporation.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef TTP223_H_
+#define TTP223_H_
+
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+
+#include "upm.h"
+#include "mraa/gpio.h"
+
+/**
+ * device context
+ */
+typedef struct _ttp223_context {
+    mraa_gpio_context       gpio;
+    uint8_t                 gpio_pin;
+    bool                    isr_installed;
+} *ttp223_context;
+
+/**
+ * Sensor Init function
+ *
+ * @param pin The pin number the sensor is attached to
+ * @return void* pointer to the sensor struct
+ */
+ttp223_context ttp223_init(int pin);
+
+/**
+ * Sensor Module close function
+ *
+ * @param dev pointer to the sensor struct
+ */
+void ttp223_close(ttp223_context dev);
+
+/**
+ * Function to tell if the sensor is pressed
+ *
+ * @param dev pointer to the sensor struct
+ * @param value pointer to store whether the sensor is pressed or not
+ * @result upm_result_t UPM success/error code
+ */
+upm_result_t ttp223_is_pressed(ttp223_context dev, bool* value);
+
+/**
+ *
+ */
+upm_result_t ttp223_install_isr(ttp223_context dev,
+                                mraa_gpio_edge_t edge_level,
+                                void (*isr)(void *), void *arg);
+
+/**
+ *
+ */
+upm_result_t ttp223_uninstall_isr(ttp223_context);
+
+#endif /* TTP223_H_ */

src/ttp223/ttp223_fti.c

@@ -0,0 +1,93 @@
+/*
+ * Author: Sarah Knepper <sarah.knepper@intel.com>
+ *         Abhishek Malik <abhishek.malik@intel.com>
+ * Copyright (c) 2015 Intel Corporation.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#include "ttp223.h"
+#include "upm_fti.h"
+
+/** 
+ * This file implements the Function Table Interface (FTI) for this sensor
+ */
+
+const char upm_ttp223_name[] = "TTP223";
+const char upm_ttp223_description[] = "TTP223 Touch Detector Sensor";
+const upm_protocol_t upm_ttp223_protocol[] = {UPM_GPIO};
+const upm_sensor_t upm_ttp223_category[] = {UPM_SWITCH};
+
+// forward declarations
+const upm_sensor_descriptor_t upm_ttp223_get_descriptor();
+const void* upm_ttp223_get_ft(upm_sensor_t sensor_type);
+void* upm_ttp223_init_name();
+void upm_ttp223_close(void* dev);
+upm_result_t upm_ttp223_is_pressed(void* dev, bool* value, int num);
+
+const upm_sensor_descriptor_t upm_ttp223_get_descriptor(){
+    upm_sensor_descriptor_t usd;
+    usd.name = upm_ttp223_name;
+    usd.description = upm_ttp223_description;
+    usd.protocol_size = 1;
+    usd.protocol = upm_ttp223_protocol;
+    usd.category_size = 1;
+    usd.category = upm_ttp223_category;
+    return usd;
+}
+
+static const upm_sensor_ft ft =
+{
+    .upm_sensor_init_name = &upm_ttp223_init_name,
+    .upm_sensor_close = &upm_ttp223_close,
+    .upm_sensor_get_descriptor = &upm_ttp223_get_descriptor
+};
+
+static const upm_switch_ft sft =
+{
+    .upm_switch_get_value = &upm_ttp223_is_pressed
+};
+
+const void* upm_ttp223_get_ft(upm_sensor_t sensor_type){
+    if(sensor_type == UPM_SWITCH){
+        return &sft;
+    }
+    else if(sensor_type == UPM_SENSOR){
+        return &ft;
+    }
+    return NULL;
+}
+
+void* upm_ttp223_init_name(){
+    return NULL;
+}
+
+void upm_ttp223_close(void* dev){
+    ttp223_close((ttp223_context)dev);
+}
+
+upm_result_t upm_ttp223_is_pressed(void* dev, bool* value, int num) {
+    if(num != 1){
+        printf("Sorry this sensor driver supports only one touch pad\n");
+        return UPM_ERROR_OUT_OF_RANGE;
+    }
+
+    return ttp223_is_pressed((ttp223_context)dev, value);
+}