1 files changed, 117 insertions, 0 deletions
diff --git a/examples/imx7_colibri_m4/demo_apps/blinking_imx_demo/gpt_timer.c b/examples/imx7_colibri_m4/demo_apps/blinking_imx_demo/gpt_timer.c
new file mode 100644
index 0000000..4b035cb
--- /dev/null
+++ b/examples/imx7_colibri_m4/demo_apps/blinking_imx_demo/gpt_timer.c
@@ -0,0 +1,117 @@
+/*
+ * 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.
+ */
+/****************************************************************************
+*
+* Comments:
+*   This file contains the functions which write and read the SPI memories
+*   using the ECSPI driver in interrupt mode.
+*
+****************************************************************************/
+
+#include "FreeRTOS.h"
+#include "semphr.h"
+#include "gpt.h"
+#include "gpt_timer.h"
+#include "board.h"
+
+static SemaphoreHandle_t xSemaphore;
+
+void GPT_Timer_Init()
+{
+    gpt_mode_config_t config = {
+        .freeRun    = false,
+        .waitEnable = true,
+        .stopEnable = true,
+        .dozeEnable = true,
+        .dbgEnable  = false,
+        .enableMode = true
+    };
+
+    xSemaphore = xSemaphoreCreateBinary();
+
+    /* Initialize GPT module */
+    GPT_Init(BOARD_GPTA_BASEADDR, &config);
+
+    /* Set GPT clock source to 24M OSC */
+    GPT_SetClockSource(BOARD_GPTA_BASEADDR, gptClockSourceOsc);
+
+    /* Set GPT interrupt priority 3 */
+    NVIC_SetPriority(BOARD_GPTA_IRQ_NUM, 3);
+
+    /* Enable NVIC interrupt */
+    NVIC_EnableIRQ(BOARD_GPTA_IRQ_NUM);
+}
+
+void GPT_Timer_Delay(uint32_t ms)
+{
+    uint64_t counter = 24000 * ms; /* First get the counter needed by delay time */
+    uint32_t high;
+    uint32_t div24m, div;
+
+    /* Get the value that exceed maximum register counter */
+    high = (uint32_t)(counter >> 32);
+
+    /* high could not exceed 24000, so that predivider is enough */
+    div24m = high / 4096; /* We need PRESCALER24M only if high exceed PRESCALER maximum value */
+    div = high / (div24m + 1); /* Get PRESCALER value */
+
+    /* Now set prescaler */
+    GPT_SetOscPrescaler(BOARD_GPTA_BASEADDR, div24m);
+    GPT_SetPrescaler(BOARD_GPTA_BASEADDR, div);
+
+    /* Set GPT compare value */
+    GPT_SetOutputCompareValue(BOARD_GPTA_BASEADDR, gptOutputCompareChannel1,
+                              (uint32_t)(counter / (div24m + 1) / (div + 1)));
+
+    /* Enable GPT Output Compare1 interrupt */
+    GPT_SetIntCmd(BOARD_GPTA_BASEADDR, gptStatusFlagOutputCompare1, true);
+
+    /* GPT start */
+    GPT_Enable(BOARD_GPTA_BASEADDR);
+
+    /* Wait until GPT event happens. */
+    xSemaphoreTake(xSemaphore, portMAX_DELAY);
+}
+
+void BOARD_GPTA_HANDLER()
+{
+    BaseType_t xHigherPriorityTaskWoken;
+
+    /* When GPT timeout, we disable GPT to make sure this is a oneshot event */
+    GPT_Disable(BOARD_GPTA_BASEADDR);
+    GPT_SetIntCmd(BOARD_GPTA_BASEADDR, gptStatusFlagOutputCompare1, false);
+    GPT_ClearStatusFlag(BOARD_GPTA_BASEADDR, gptStatusFlagOutputCompare1);
+
+    xSemaphoreGiveFromISR(xSemaphore, &xHigherPriorityTaskWoken);
+}
+
+/*******************************************************************************
+ * EOF
+ ******************************************************************************/