[fix] fix grammar bug, and fix tencent evb mx+ key mismatch problem

[update] change dirs and add examples directory

Signed-off-by: MurphyZhao <d2014zjt@163.com>

README.md

@@ -35,7 +35,7 @@ ARMCC -O0 优化的情况下，FlexibleButton 资源占用如下：
 
 ## 快速体验
 
-FlexibleButton 库中提供了一个测试例程 [`./flexible_button_demo.c`](./flexible_button_demo.c)，该例程基于 RT-Thread OS 进行测试，硬件平台选择了 *RT-Thread IoT Board Pandora v2.51* 开发板。当然你可以选择使用其他的 OS，或者使用裸机测试，只需要移除 OS 相关的特性即可。
+FlexibleButton 库中提供了一个测试例程 [`./examples/demo_rtt_iotboard.c`](./examples/demo_rtt_iotboard.c)，该例程基于 RT-Thread OS 进行测试，硬件平台选择了 *RT-Thread IoT Board Pandora v2.51* 开发板。当然你可以选择使用其他的 OS，或者使用裸机测试，只需要移除 OS 相关的特性即可。
 
 如果你使用自己的硬件平台，只需要将 FlexibleButton 库源码和例程加入你既有的工程下即可。
 
@@ -294,7 +294,7 @@ void flex_button_scan(void);
 
 ### 关于组合按键
 
-该按键库仅做了底层的按键扫描处理，一次扫描可以确定所有的按键状态，并上报对应的按键事件，如果需要支持组合按键，请再封一层，根据按键库返回的事件封装需要的组合按键。[示例程序](./flexible_button_demo.c)提供了简单的实现。
+该按键库仅做了底层的按键扫描处理，一次扫描可以确定所有的按键状态，并上报对应的按键事件，如果需要支持组合按键，请再封一层，根据按键库返回的事件封装需要的组合按键。[示例程序](./examples/demo_rtt_iotboard.c)提供了简单的实现。
 
 ### 关于矩阵键盘
 

SConscript

@@ -11,7 +11,7 @@ flexible_button.c
 ''')
 
 if GetDepend(['PKG_USING_FLEXIBLE_BUTTON_DEMO']):
-    src += Glob("flexible_button_demo.c")
+    src += Glob("examples/demo_rtt_iotboard.c")
 
 CPPPATH = [cwd]
 

flexible_button_demo.c → examples/demo_rtt_iotboard.c

@@ -1,5 +1,5 @@
 /**
- * @File:    flexible_button_demo.c
+ * @File:    demo_rtt_iotboard.c
  * @Author:  MurphyZhao
  * @Date:    2018-09-29
  * 
@@ -20,10 +20,16 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  *
+ * message:
+ * This demo is base on rt-thread IoT Board, reference
+ *     https://github.com/RT-Thread/IoT_Board
+ * Hardware version: RT-Thread IoT Board Pandora v2.51.
+ * 
  * Change logs:
  * Date        Author       Notes
  * 2018-09-29  MurphyZhao   First add
  * 2019-08-02  MurphyZhao   Migrate code to github.com/murphyzhao account
+ * 2020-02-14  MurphyZhao   Fix grammar bug
 */
 
 #include <rtthread.h>
@@ -119,7 +125,8 @@ static void common_btn_evt_cb(void *arg)
         btn->event, enum_event_string[btn->event],
         btn->click_cnt);
 
-    if (flex_button_event_read(&user_button[USER_BUTTON_0]) == flex_button_event_read(&user_button[USER_BUTTON_1]) == FLEX_BTN_PRESS_CLICK)
+    if ((flex_button_event_read(&user_button[USER_BUTTON_0]) == FLEX_BTN_PRESS_CLICK) &&\
+        (flex_button_event_read(&user_button[USER_BUTTON_1]) == FLEX_BTN_PRESS_CLICK))
     {
         rt_kprintf("[combination]: button 0 and button 1\n");
     }

flexible_button_tencentos_tiny_demo.c → examples/demo_tos_evb_mx_plus.c

@@ -1,5 +1,5 @@
 /**
- * @File:    flexible_button_demo.c
+ * @File:    demo_tos_evb_mx_plus.c
  * @Author:  MurphyZhao
  * @Date:    2018-09-29
  * 
@@ -20,17 +20,22 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  *
+ * message:
+ * This demo is base on TencentOSTiny EVB_MX+, reference
+ *     https://github.com/Tencent/TencentOS-tiny
+ * Hardware: TencentOSTiny EVB_MX+.
+ * 
  * Change logs:
  * Date        Author       Notes
- * 2018-09-29  MurphyZhao   First add
- * 2019-08-02  MurphyZhao   Migrate code to github.com/murphyzhao account
+ * 2020-01-20  MurphyZhao   First add
+ * 2020-02-14  MurphyZhao   Fix Key mismatch problem and fix grammar bug
 */
 
+#include "stdio.h"
 #include "mcu_init.h"
 #include "cmsis_os.h"
 
-#include "stm32l4xx_hal.h"
-#include "stdio.h"
+#include "main.h"
 
 #include "flexible_button.h"
 
@@ -38,34 +43,34 @@
 static void button_scan(void *arg);
 osThreadDef(button_scan, osPriorityNormal, 1, FLEXIBLE_BTN_STK_SIZE);
 
-#ifndef PIN_KEY1
-#define PORT_KEY1 GPIOB
-#define PIN_KEY1 GPIO_PIN_12 // PB12
+#ifndef PIN_KEY4
+#define PORT_KEY4 GPIOB
+#define PIN_KEY4 GPIO_PIN_12 // PB12
 #endif
 
-#ifndef PIN_KEY2
-#define PORT_KEY2 GPIOB
-#define PIN_KEY2 GPIO_PIN_2  // PB2
+#ifndef PIN_KEY3
+#define PORT_KEY3 GPIOB
+#define PIN_KEY3 GPIO_PIN_2  // PB2
 #endif
 
-#ifndef PIN_KEY3
-#define PORT_KEY3 GPIOC
-#define PIN_KEY3 GPIO_PIN_10 // PC10
+#ifndef PIN_KEY2
+#define PORT_KEY2 GPIOC
+#define PIN_KEY2 GPIO_PIN_10 // PC10
 #endif
 
-#ifndef PIN_KEY4
-#define PORT_KEY4 GPIOB
-#define PIN_KEY4 GPIO_PIN_13 // PB13
+#ifndef PIN_KEY1
+#define PORT_KEY1 GPIOB
+#define PIN_KEY1 GPIO_PIN_13 // PB13
 #endif
 
 #define ENUM_TO_STR(e) (#e)
 
 typedef enum
 {
-    USER_BUTTON_0 = 0,
-    USER_BUTTON_1,
+    USER_BUTTON_1 = 0,
     USER_BUTTON_2,
     USER_BUTTON_3,
+    USER_BUTTON_4,
     USER_BUTTON_MAX
 } user_button_t;
 
@@ -85,10 +90,10 @@ static char *enum_event_string[] = {
 };
 
 static char *enum_btn_id_string[] = {
-    ENUM_TO_STR(USER_BUTTON_0),
-    ENUM_TO_STR(USER_BUTTON_1),
-    ENUM_TO_STR(USER_BUTTON_2),
-    ENUM_TO_STR(USER_BUTTON_3),
+    ENUM_TO_STR(F1),
+    ENUM_TO_STR(F2),
+    ENUM_TO_STR(F3),
+    ENUM_TO_STR(F4),
     ENUM_TO_STR(USER_BUTTON_MAX),
 };
 
@@ -102,17 +107,17 @@ static uint8_t common_btn_read(void *arg)
 
     switch (btn->id)
     {
-    case USER_BUTTON_0:
-        value = HAL_GPIO_ReadPin(PORT_KEY1, PIN_KEY1);
-        break;
     case USER_BUTTON_1:
-        value = HAL_GPIO_ReadPin(PORT_KEY2, PIN_KEY2);;
+        value = HAL_GPIO_ReadPin(PORT_KEY1, PIN_KEY1);
         break;
     case USER_BUTTON_2:
-        value = HAL_GPIO_ReadPin(PORT_KEY3, PIN_KEY3);;
+        value = HAL_GPIO_ReadPin(PORT_KEY2, PIN_KEY2);
         break;
     case USER_BUTTON_3:
-        value = HAL_GPIO_ReadPin(PORT_KEY4, PIN_KEY4);;
+        value = HAL_GPIO_ReadPin(PORT_KEY3, PIN_KEY3);
+        break;
+    case USER_BUTTON_4:
+        value = HAL_GPIO_ReadPin(PORT_KEY4, PIN_KEY4);
         break;
     default:
         break;
@@ -130,9 +135,10 @@ static void common_btn_evt_cb(void *arg)
         btn->event, enum_event_string[btn->event],
         btn->click_cnt);
 
-    if (flex_button_event_read(&user_button[USER_BUTTON_0]) == flex_button_event_read(&user_button[USER_BUTTON_1]) == FLEX_BTN_PRESS_CLICK)
+    if ((flex_button_event_read(&user_button[USER_BUTTON_1]) == FLEX_BTN_PRESS_CLICK) &&\
+        (flex_button_event_read(&user_button[USER_BUTTON_2]) == FLEX_BTN_PRESS_CLICK))
     {
-        printf("[combination]: button 0 and button 1\r\n");
+        printf("[combination]: button 1 and button 2\r\n");
     }
 }
 
@@ -155,12 +161,12 @@ static void user_button_init(void)
     __HAL_RCC_GPIOB_CLK_ENABLE();
     __HAL_RCC_GPIOC_CLK_ENABLE();
     
-    GPIO_InitStruct.Pin = PIN_KEY1 | PIN_KEY2 | PIN_KEY4;
+    GPIO_InitStruct.Pin = PIN_KEY1 | PIN_KEY3 | PIN_KEY4;
     GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
     GPIO_InitStruct.Pull = GPIO_PULLUP;
     HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
 
-    GPIO_InitStruct.Pin = PIN_KEY3;
+    GPIO_InitStruct.Pin = PIN_KEY2;
     GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
     GPIO_InitStruct.Pull = GPIO_PULLUP;
     HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);
@@ -179,6 +185,12 @@ static void user_button_init(void)
     }
 }
 
+/**
+ * flex_button_main
+ * 
+ * @brief please call this function in application.
+ * 
+*/
 int flex_button_main(void)
 {
     user_button_init();