库函数与寄存器IO初始化及点灯

我是纯玩STM32的，第一次接触LPC的板子，经过这些天的学习发现，LPC的初始化方式跟STM32大同小异，毕竟都是m4内核么，但是细节实现又有很多不同，下面把LPC的初始化方式简单介绍下：控制LED应将IO口配置为输出模式。
第一步，时钟初始化：
CLOCK_EnableClock(kCLOCK_Gpio0);//这里LED对应引脚为0.15
首先是寄存器方式：
port是端口号，pin是引脚号

1. void myled_reg_init(uint32_t port, uint32_t pin)
   
2. {
   
3. GPIO->DIR[port] |= 1U << pin;
   
4. GPIO->B[port][pin] = 1;
   
5. IOCON->PIO[port][pin] = IOCON_MODE_PULLUP;
   
6. }

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接下来是库函数：

1. void myled_init(uint32_t port, uint32_t pin)
   
2. {
   
3.     gpio_pin_config_t config=
   
4.     {
   
5.             kGPIO_DigitalOutput,
   
6.             1
   
7.     };
   
8.     GPIO_PinInit(GPIO, port, pin, &config);
   
9.     IOCON_PinMuxSet(IOCON, port, pin, IOCON_MODE_PULLUP);
   
10. }

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控制引脚电平：
寄存器方式
引脚0.15输出低电平：GPIO->B[0][15] = 0;
引脚0.15输出高电平：
GPIO->B[0][15] = 1;

库函数方式：
output变量决定电平高低：

1. GPIO_WritePinOutput(GPIO_Type *base, uint32_t port, uint32_t pin, uint8_t output)

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引脚设置高电平：

1. GPIO_SetPinsOutput(GPIO_Type *base, uint32_t port, uint32_t mask)

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引脚设置低电平：

1. GPIO_ClearPinsOutput(GPIO_Type *base, uint32_t port, uint32_t mask)

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反转IO电平

1. GPIO_TogglePinsOutput(GPIO_Type *base, uint32_t port, uint32_t mask)

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完整的代码如下：

1. /*
   
2. * Copyright (c) 2013 - 2015, Freescale Semiconductor, Inc.
   
3. * All rights reserved.
   
4. *
   
5. * Redistribution and use in source and binary forms, with or without modification,
   
6. * are permitted provided that the following conditions are met:
   
7. *
   
8. * o Redistributions of source code must retain the above copyright notice, this list
   
9. *   of conditions and the following disclaimer.
   
10. *
    
11. * o Redistributions in binary form must reproduce the above copyright notice, this
    
12. *   list of conditions and the following disclaimer in the documentation and/or
    
13. *   other materials provided with the distribution.
    
14. *
    
15. * o Neither the name of Freescale Semiconductor, Inc. nor the names of its
    
16. *   contributors may be used to endorse or promote products derived from this
    
17. *   software without specific prior written permission.
    
18. *
    
19. * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
    
20. * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
    
21. * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
    
22. * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
    
23. * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
    
24. * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
    
25. * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
    
26. * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
    
27. * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
    
28. * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
    
29. */
    
30. 
    
31. #include "fsl_device_registers.h"
    
32. #include "fsl_debug_console.h"
    
33. #include "board.h"
    
34. 
    
35. #include "pin_mux.h"
    
36. 
    
37. #include "fsl_common.h"
    
38. #include "fsl_iocon.h"
    
39. 
    
40. #include <stdbool.h>
    
41. 
    
42. 
    
43. #include "app_interrupt.h"
    
44. #include "app_led.h"
    
45. #include "app_adc.h"
    
46. #include "app_key.h"
    
47. #include "app_dmic.h"
    
48. #include "app_spiflash.h"
    
49. #include "app_pct2075.h"
    
50. #include "app_wm8904.h"
    
51. #include "app_usbdmsc.h"
    
52. #include "ff.h"
    
53. #include "diskio.h"
    
54. #include "app_spisd.h"
    
55. 
    
56. #include "fsl_dmic.h"
    
57. 
    
58. /*******************************************************************************
    
59. * Definitions
    
60. ******************************************************************************/
    
61. 
    
62. 
    
63. /*******************************************************************************
    
64. * Prototypes
    
65. ******************************************************************************/
    
66. volatile float fPCTValue;
    
67. static FATFS g_fileSystem; /* File system object */
    
68. const TCHAR driverNumberBuffer[3U] = {SDSPIDISK + '0', ':', '/'};
    
69. unsigned int gvalue = 1000;
    
70. uint16_t wADCValue = 0;
    
71. 
    
72. /*******************************************************************************
    
73. * Code
    
74. ******************************************************************************/
    
75. void myled_init(uint32_t port, uint32_t pin)
    
76. {
    
77.     gpio_pin_config_t config=
    
78.     {
    
79.             kGPIO_DigitalOutput,
    
80.             1
    
81.     };
    
82.     GPIO_PinInit(GPIO, port, pin, &config);
    
83.     IOCON_PinMuxSet(IOCON, port, pin, IOCON_MODE_PULLUP);
    
84. }
    
85. 
    
86. void myled_reg_init(uint32_t port, uint32_t pin)
    
87. {
    
88.         GPIO->DIR[port] |= 1U << pin;
    
89.         GPIO->B[port][pin] = 1;
    
90.     IOCON->PIO[port][pin] = IOCON_MODE_PULLUP;
    
91. }
    
92. 
    
93. 
    
94. /*！
    
95. * @brief Main function
    
96. */
    
97. int main(void)
    
98. {
    
99.         char ch;
    
100. 
     
101.         uint8_t ret;
     
102.         
     
103.         /* Init board hardware.  */
     
104.         /* attach 12 MHz clock to FLEXCOMM0 (debug console) */
     
105.         CLOCK_AttachClk(BOARD_DEBUG_UART_CLK_ATTACH);
     
106. 
     
107.         BOARD_InitPins();
     
108.         BOARD_BootClockRUN();
     
109.         BOARD_InitDebugConsole();
     
110.         
     
111.         SystemCoreClockUpdate();
     
112.         
     
113.         SysTick_Config(SystemCoreClock/1000);
     
114.         
     
115.         PRINTF("\r\n-------------------------------\r\n\r\n");
     
116.         PRINTF("hello world.\r\n");
     
117.         PRINTF("LPC54110 Sys Clock is %dMhz.\r\n", SystemCoreClock/1000000);
     
118.         PRINTF("\r\n-------------------------------\r\n");
     
119.         
     
120.         CLOCK_EnableClock(kCLOCK_InputMux);
     
121.         CLOCK_EnableClock(kCLOCK_Iocon);
     
122.         CLOCK_EnableClock(kCLOCK_Gpio0);
     
123.         CLOCK_EnableClock(kCLOCK_Gpio1);
     
124.         
     
125.         // led_init();
     
126.         myled_init(0, 15);
     
127.         key_init();
     
128.         adc_init();
     
129. 
     
130.         while (1)
     
131.         {
     
132. // ADC test schedule
     
133.                 wADCValue = adc_read(ADC_CHANNEL_NUM);
     
134.                 gvalue = wADCValue;
     
135. 
     
136.        for(gvalue = wADCValue;gvalue > 0;gvalue--)
     
137.        {
     
138.            uint32_t i = 0;
     
139.            for(i=1000;i>0;i--);
     
140.        }
     
141. 
     
142.                    GPIO->B[0][15] = 0;
     
143.         
     
144.         for(gvalue = wADCValue;gvalue > 0;gvalue--)
     
145.         {
     
146.             uint32_t i = 0;
     
147.             for(i=1000;i>0;i--);
     
148.         }
     
149. 
     
150.                    GPIO->B[0][15] = 1;
     
151.             // GPIO->NOT[0] |= 1<<15;
     
152.                
     
153. //                usbdmsc_proc();
     
154. //                __WFI();
     
155.         }
     
156. }
     

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