examples: gpio_bank2_imx: gpio example using just GPIO2

This example control a led and a button just using GPIOs from
the bank 2 (GPIO2).

Signed-off-by: Raul Munoz <raul.munoz@toradex.com>
Signed-off-by: Stefan Agner <stefan.agner@toradex.com>

1 files changed, 94 insertions, 0 deletions

diff --git a/examples/imx7_colibri_m4/driver_examples/gpio_bank2_imx/main.c b/examples/imx7_colibri_m4/driver_examples/gpio_bank2_imx/main.c
new file mode 100644
index 0000000..c130c31
--- /dev/null
+++ b/examples/imx7_colibri_m4/driver_examples/gpio_bank2_imx/main.c
@@ -0,0 +1,94 @@
+/*
+ * Copyright (c) 2015, Freescale Semiconductor, Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * o Redistributions of source code must retain the above copyright notice, this list
+ *   of conditions and the following disclaimer.
+ *
+ * o 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.
+ *
+ * o Neither the name of Freescale Semiconductor, Inc. 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 HOLDER 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.
+ */
+
+#include <stdio.h>
+#include "board.h"
+#include "gpio_pins.h"
+#include "gpio_imx.h"
+#include "gpio_ctrl.h"
+#include "debug_console_imx.h"
+
+
+/* button relevent variables */
+static uint8_t keyPressCount;
+static uint8_t keyPressCountOld;
+
+
+/******************************************************************************
+*
+* Function Name: main
+* Comments: Hello World Example with GPIO.
+*   This example include:
+*   Configure BUTTON1 as GPIO functionality
+*     and check the button's state(pressed or released). According to the Button
+*     status, copy it to the LED
+*
+******************************************************************************/
+int main(void)
+{
+    /* hardware initialiize, include RDC, IOMUX, Uart debug initialize */
+    hardware_init();
+    PRINTF("\n\r\n\r\n\r");
+    PRINTF("=======================================================\n\r");
+    PRINTF("================= GPIO Bank 2 Example =================\n\r");
+    PRINTF("===== Change the Led Status according to the Key ======\n\r");
+    PRINTF("=======================================================\n\r");
+
+    /* GPIO module initialize, configure "LED" as output and button as interrupt mode. */
+    GPIO_Ctrl_Init();
+
+    keyPressCount = 0;
+    keyPressCountOld = 0;
+
+    /* Initialize enviroments and led status */
+    keyPressCount = GPIO_Ctrl_GetKey(BOARD_GPIO_SWITCH1_CONFIG);
+    keyPressCountOld = keyPressCount;
+    GPIO_Ctrl_WriteLed(BOARD_GPIO_LED1_CONFIG, BOARD_GPIO_LED1_RDC_PDAP, keyPressCount);
+
+    PRINTF("================== Hello World GPIO ===================\n\r");
+
+    while(true)
+    {
+        /* wait for user change button leve */
+        keyPressCount = GPIO_Ctrl_GetKey(BOARD_GPIO_SWITCH1_CONFIG);
+        /* If button change, than print and update LED */
+        if(keyPressCount != keyPressCountOld)
+        {
+            keyPressCountOld = keyPressCount;
+            GPIO_Ctrl_WriteLed(BOARD_GPIO_LED1_CONFIG, BOARD_GPIO_LED1_RDC_PDAP, keyPressCount);
+            PRINTF("================== keyPressCount = %d ==================\n\r", keyPressCount);
+        }
+    }
+}
+
+
+/*******************************************************************************
+ * EOF
+ ******************************************************************************/