add examples

RTL00_SDKV35a/example_sources/gtimer/readme.txt

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+Example Description
+
+This example describes how to use general timer.
+
+Requirement Components:
+    2 LED
+
+Connect the two LED to port PC_0 and PC_1 respectivly.  
+
+Behavior:
+The two LED will blink at different frequence.
+
+    Two timers are intialized in this example
+    (1) Periodic timer
+    (2) One shut timer
+
+

RTL00_SDKV35a/example_sources/gtimer/src/main.c

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+/*
+ *  Routines to access hardware
+ *
+ *  Copyright (c) 2013 Realtek Semiconductor Corp.
+ *
+ *  This module is a confidential and proprietary property of RealTek and
+ *  possession or use of this module requires written permission of RealTek.
+ */
+
+#include "device.h"
+#include "gpio_api.h"   // mbed
+#include "timer_api.h"
+#include "main.h"
+
+#define GPIO_LED_PIN1       PC_0
+#define GPIO_LED_PIN2       PC_1
+
+/**
+  * @brief  Main program.
+  * @param  None
+  * @retval None
+  */
+//int main_app(IN u16 argc, IN u8 *argv[])
+
+gtimer_t my_timer1;
+gtimer_t my_timer2;
+gpio_t gpio_led1;
+gpio_t gpio_led2;
+volatile uint32_t time2_expired=0;
+
+void timer1_timeout_handler(uint32_t id)
+{
+    gpio_t *gpio_led = (gpio_t *)id;
+
+    gpio_write(gpio_led, !gpio_read(gpio_led));    
+}
+
+void timer2_timeout_handler(uint32_t id)
+{
+    time2_expired = 1;
+}
+
+void main(void)
+{
+    // Init LED control pin
+    gpio_init(&gpio_led1, GPIO_LED_PIN1);
+    gpio_dir(&gpio_led1, PIN_OUTPUT);    // Direction: Output
+    gpio_mode(&gpio_led1, PullNone);     // No pull
+
+    gpio_init(&gpio_led2, GPIO_LED_PIN2);
+    gpio_dir(&gpio_led2, PIN_OUTPUT);    // Direction: Output
+    gpio_mode(&gpio_led2, PullNone);     // No pull
+
+    // Initial a periodical timer
+    gtimer_init(&my_timer1, TIMER0);
+    gtimer_start_periodical(&my_timer1, 1000000, (void*)timer1_timeout_handler, (uint32_t)&gpio_led1);
+
+    // Initial a one-shout timer and re-trigger it in while loop
+    gtimer_init(&my_timer2, TIMER1);
+    time2_expired = 0;
+    gtimer_start_one_shout(&my_timer2, 500000, (void*)timer2_timeout_handler, NULL);
+    
+    while(1){
+        if (time2_expired) {
+            gpio_write(&gpio_led2, !gpio_read(&gpio_led2));
+            time2_expired = 0;
+            gtimer_start_one_shout(&my_timer2, 500000, (void*)timer2_timeout_handler, NULL);
+        }
+    }
+}
+