--- /dev/null
+Limited example of AT42QT1012 capacitive touch sensor support
+
+Copyright 2015 Nathael Pajani <nathael.pajani@ed3l.fr>
+
+
+/* ****************************************************************************
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ *
+ *************************************************************************** */
+
+This example shows the support of the AT42QT1012 touch sensor support.
+
+This sensor basically acts as a button, and can be handled as such. Thus, this
+code is almost the same as the GPIO interrupt exemple.
+
+For this example, the sensor must be connected to GPIO_0_7. Refer to the user
+manual of the module you selected to test this example to know how to connect
+to this GPIO.
+
+Any contact change on touch button turns on the Green status led and displays
+a message on UART0
+
--- /dev/null
+/****************************************************************************
+ * touch_sensor/main.c
+ *
+ * AT42QT1012 capacitive touch sensor example
+ *
+ * Copyright 2020 Nathael Pajani <nathael.pajani@ed3l.fr>
+ *
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ *
+ *************************************************************************** */
+
+/*
+ * Any contact change on touch button turns on the Green status led and
+ * displays a message on UART0
+*/
+
+#include "core/system.h"
+#include "core/systick.h"
+#include "core/pio.h"
+#include "lib/stdio.h"
+#include "drivers/serial.h"
+#include "drivers/gpio.h"
+#include "extdrv/status_led.h"
+
+
+#define MODULE_VERSION 0x04
+#define MODULE_NAME "GPIO Demo Module"
+
+
+#define SELECTED_FREQ FREQ_SEL_48MHz
+
+/***************************************************************************** */
+/* Pins configuration */
+/* pins blocks are passed to set_pins() for pins configuration.
+ * Unused pin blocks can be removed safely with the corresponding set_pins() call
+ * All pins blocks may be safelly merged in a single block for single set_pins() call..
+ */
+const struct pio_config common_pins[] = {
+ /* UART 0 */
+ { LPC_UART0_RX_PIO_0_1, LPC_IO_DIGITAL },
+ { LPC_UART0_TX_PIO_0_2, LPC_IO_DIGITAL },
+ { LPC_GPIO_0_7, LPC_IO_DIGITAL },
+ ARRAY_LAST_PIO,
+};
+
+const struct pio status_led_green = LPC_GPIO_1_4;
+const struct pio status_led_red = LPC_GPIO_1_5;
+
+const struct pio button = LPC_GPIO_0_12; /* ISP button */
+const struct pio touch = LPC_GPIO_0_7; /* Touch button - AT42QT1012 */
+
+
+/***************************************************************************** */
+void system_init()
+{
+ /* Stop the watchdog */
+ startup_watchdog_disable(); /* Do it right now, before it gets a chance to break in */
+ system_brown_out_detection_config(0); /* No ADC used */
+ system_set_default_power_state();
+ clock_config(SELECTED_FREQ);
+ set_pins(common_pins);
+ gpio_on();
+ status_led_config(&status_led_green, &status_led_red);
+ /* System tick timer MUST be configured and running in order to use the sleeping
+ * functions */
+ systick_timer_on(1); /* 1ms */
+ systick_start();
+}
+
+/* Define our fault handler. This one is not mandatory, the dummy fault handler
+ * will be used when it's not overridden here.
+ * Note : The default one does a simple infinite loop. If the watchdog is deactivated
+ * the system will hang.
+ */
+void fault_info(const char* name, uint32_t len)
+{
+ uprintf(UART0, name);
+ while (1);
+}
+
+
+volatile uint8_t activation_request = 0;
+void activate(uint32_t gpio) {
+ activation_request = gpio;
+}
+
+
+/***************************************************************************** */
+int main(void)
+{
+ system_init();
+ uart_on(UART0, 115200, NULL);
+
+ /* Activate the interrupt on both edges (button press and button release) */
+ config_gpio(&touch, 0, GPIO_DIR_IN, 0);
+ set_gpio_callback(activate, &touch, EDGES_BOTH);
+
+
+ uprintf(UART0, "Configured\n");
+ while (1) {
+ if (activation_request != 0) {
+ status_led(green_only);
+ uprintf(UART0, "Detection: %d : %s\n", activation_request, (gpio_read(touch) ? "ON" : "OFF"));
+ msleep(100);
+ activation_request = 0;
+ }
+ status_led(none);
+ msleep(200);
+ }
+ return 0;
+}
+
+
+
