1: /*

   2:     头文件包含

   3: */

   4: #include "lpc12xx_libcfg.h"

   5:  

   6: /*********************************************************************************************************

   7:   宏定义

   8: *********************************************************************************************************/

   9: #define LED_PORT    LPC_GPIO1                                           /* LED引脚端口P1                */

  10: #define LED_PINS    2                                                   /* LED引脚P1.2                  */

  11:  

  12: /*********************************************************************************************************

  13:   全局变量定义

  14: *********************************************************************************************************/

  15: static uint16_t GusGPIO1Port[7] = {                                     /* GPIO1端口引脚类型            */

  16:     IOCON_PIO_1_0,

  17:     IOCON_PIO_1_1,

  18:     IOCON_PIO_1_2,

  19:     IOCON_PIO_1_3,

  20:     IOCON_PIO_1_4,

  21:     IOCON_PIO_1_5,

  22:     IOCON_PIO_1_6

  23: };

  24:  

  25: void myDelay (uint32_t ulTime)    //软件延时

  26: {

  27:     uint32_t i = 0;

  28:     

  29:     while (ulTime--) {

  30:         for (i = 0; i < 5000; i++);

  31:     }

  32: }

  33:  

  34: void ledOn (void) // 点亮LED(输出低电平)

  35: {

  36:     GPIO_SetLowLevel(LED_PORT, LED_PINS, ENABLE);                       /* 输出低电平，点亮LED          */

  37: }

  38:  

  39:  

  40: void ledOff (void)//Descriptions:        熄灭LED(输出高电平)

  41: {

  42:     GPIO_SetHighLevel(LED_PORT, LED_PINS, ENABLE);                      /* 输出高电平，熄灭LED          */

  43: }

  44:  

  45:  

  46: void ledInit (void)        //Descriptions:        LED初始化

  47: {

  48:     IOCON_PIO_CFG_Type PIO_mode;

  49:  

  50:     IOCON_StructInit(&PIO_mode);                                        /* 初始化端口模式               */

  51:     PIO_mode.type = GusGPIO1Port[LED_PINS];

  52:     IOCON_SetFunc(&PIO_mode);                                           /* 设置LED引脚为GPIO功能        */

  53:  

  54:     GPIO_SetDir(LED_PORT, LED_PINS, GPIO_DIR_OUTPUT);                   /* 设置LED引脚为输出            */

  55:     

  56:     ledOff();                                                           /* 熄灭LED                      */

  57: }

  58:  

  59:  

  60: int main (void)                // 运行程序，观察LED1状态.LED1以约200ms为周期闪烁

  61: {

  62:     SystemInit();                                                       /* 系统时钟初始化               */

  63:     SYS_ConfigAHBCLK(SYS_AHBCLKCTRL_IOCON, ENABLE);                     /* IOCON模块使能                */

  64:     SYS_ConfigAHBCLK(SYS_AHBCLKCTRL_GPIO1, ENABLE);                     /* GPIO1时钟使能                */

  65:  

  66:     ledInit();                                                          /* LED初始化                    */

  67:  

  68:     while(1) {

  69:         ledOn();

  70:         myDelay(100);

  71:         ledOff();

  72:         myDelay(200); 

  73:     } 

  74: }

  75:  

  76: #ifdef  DEBUG

  77: /*********************************************************************************************************

  78: ** Function name:       check_failed

  79: ** Descriptions:

  80: ** input parameters:    无

  81: ** output parameters:   无

  82: ** Returned value:      无

  83: *********************************************************************************************************/

  84: void check_failed (uint8_t *file, uint32_t line)

  85: {

  86:     while(1);                                                           /* Infinite loop                */

  87: }

  88: #endif

   1: /**

   2:   * @brief  使能或者禁止系统和外围时钟.

   3:                 Disable or enable system and peripheral clock.

   4:   *

   5:   * @param  AHBClk_Type: 外围模块时钟类型,AHB clock type.

   6:   * @param  CmdState:使能/禁止 Enable or disable the clock for System or 

   7:   *                      peripheral blocks.  

   8:   *         This parameter can be ENABLE or DISABLE.  

   9:   * @retval None.

  10:   */                

  11: void SYS_ConfigAHBCLK(uint32_t AHBClk_Type, FunctionalState CmdState)

  12: {

  13:     if(CmdState) LPC_SYSCON->SYSAHBCLKCTRL |= AHBClk_Type;

  14:     else LPC_SYSCON->SYSAHBCLKCTRL &= ~(AHBClk_Type);

  15: }

   1: /**

   2:   * @brief       Set Value for bits that have output direction on GPIO port.

   3:                    设置GPIO端口的输出值.

   4:   * @param pGPIO      LPC_GPIOn 哪个GPIO

   5:                           Port Number selection, should be LPC_GPIO0, LPC_GPIO1, LPC_GPIO2

   6:   * @param bitPosi    n 哪个引脚号

   7:                           bit position value, should be from 0 to 31, if it is oxff, set 'value'

   8:   * @param value        值:0/1

   9:                                    if bitPosi is from 0 to 31, Direction value, should be:

  10:   *                              - 0: no effect

  11:   *                              - 1: high level.

  12:   *                             if bitPosi is oxff, set the all 32-bits of register

  13:   * @return                  None

  14:   *

  15:   * Note:

  16:   * - For all bits that has been set as input direction, this function will

  17:   * not effect.

  18:   * - For all remaining bits that are not activated in bitValue (value '0')

  19:   * will not be effected by this function.

  20:   */

  21: void GPIO_SetHighLevel(LPC_GPIO_TypeDef* pGPIO, uint8_t bitPosi, uint32_t value)

  22: {

  23:     CHECK_PARAM(PARAM_GPIOx(pGPIO));

  24:  

  25:     gpio_setvalue((uint32_t *)&pGPIO->SET, bitPosi, value);

  26: }

  27:  

  28: /**

  29:   * @brief    Clear Value for bits that have output direction on GPIO port.

  30:   * @param pGPIO       Port Number selection, should be LPC_GPIO0, LPC_GPIO1, LPC_GPIO2

  31:   * @param bitPosi       bit position value, should be from 0 to 31, if it is oxff, set 'value'

  32:   * @param value        if bitPosi is from 0 to 31, Direction value, should be:

  33:   *                              - 0: No effect.

  34:   *                              - 1: low level.

  35:   *                             if bitPosi is oxff, set the all 32-bits of register

  36:   * @return  None

  37:   *

  38:   * Note:

  39:   * - For all bits that has been set as input direction, this function will

  40:   * not effect.

  41:   * - For all remaining bits that are not activated in bitValue (value '0')

  42:   * will not be effected by this function.

  43:   */

  44: void GPIO_SetLowLevel(LPC_GPIO_TypeDef* pGPIO, uint8_t bitPosi, uint32_t value)

  45: {

  46:     CHECK_PARAM(PARAM_GPIOx(pGPIO));

  47:  

  48:     gpio_setvalue((uint32_t *)&pGPIO->CLR, bitPosi, value);   

  49: }

   1: #ifdef  DEBUG

   2: /*******************************************************************************

   3: * @brief  这个函数用于某个函数的参数检查,只在DEBUG模式下编译时使用.

   4: *         The CHECK_PARAM macro is used for function's parameters check.

   5: *                 It is used only if the library is compiled in DEBUG mode.

   6: * @param[in]   表达式,如果表达式为假,调用参数检查失败(check_failed.)函数

   7: *  expr - If expr is false, it calls check_failed() function

   8: *                        which reports the name of the source file and the source

   9: *                        line number of the call that failed.

  10: *                    - If expr is true, it returns no value.

  11: * @return        None

  12: *******************************************************************************/

  13: #define CHECK_PARAM(expr) ((expr) ? (void)0 : check_failed((uint8_t *)__FILE__, __LINE__))

  14: #else

  15: #define CHECK_PARAM(expr)

16: #endif /* DEBUG */

   1: #define PARAM_GPIOx(n)  ((((uint32_t *)n)==((uint32_t *)LPC_GPIO0)) || \

   2:                          (((uint32_t *)n)==((uint32_t *)LPC_GPIO1)) || \

   3:                          (((uint32_t *)n)==((uint32_t *)LPC_GPIO2)))

   4:  

   5: volatile uint32_t GPIOShadowPort[3];

   1:  

   2: /**

   3:   * @brief    Set GPIO register.

   4:   * @param pGPIO         LPC_GPIOn     Port Number selection, should be LPC_GPIO0, LPC_GPIO1, LPC_GPIO2

   5:   * @param offset        寄存器的偏移值    Register offset value.  

   6:   * @param bitPosi       操作比特位/直接设置值    bit position value, should be from 0 to 31, if it is oxff, set 'value'

   7:   * @param value        如果操作比特位,那么值为0/1

   8:   *                                      if bitPosi is from 0 to 31, Direction value, should be:

   9:   *                              - 0: no mask.

  10:   *                              - 1: mask.

  11:   *                             if bitPosi is oxff, set the all 32-bits of register

  12:   * @return  None

  13:   *

  14:   * Note: All remaining bits that are not activated in bitValue (value '0')

  15:   * will not be effected by this function.

  16:   */

  17: static void gpio_setvalue(uint32_t *p, uint8_t bitPosi, uint32_t value)

  18: {

  19:     CHECK_PARAM(( bitPosi < 0x20 ) || ( bitPosi == 0xFF )); 

  20:     CHECK_PARAM(( value == 0 ) || ( value == 1 ));

  21:     

  22:     if(bitPosi < 0x20){

  23:         if (value) {

  24:             *(uint32_t *)p |= (0x1<<bitPosi);

  25:         }

  26:         else {

  27:             *(uint32_t *)p &= ~(0x1<<bitPosi);

  28:         }

  29:     }

  30:     else if(bitPosi == 0xFF){

  31:         *(uint32_t *)p = value;

  32:     }

  33: }