【NXP OKdo E1双核Cortex M33开发板】测评+ LED灯控制

jinglixixi

在OKdo E1开发板上，配置了3个LED灯，其原理图如图1所示。

图1   LED灯原理图

由此可知LED灯与MCU的连接关系为：

LEDR---PIO1_4

LEDB---PIO1_6

LEDG---PIO1_7

为便于相关引脚的设置，故编写了一个LED灯的配置函数：

1. void LEDS_InitPins(void)
   
2. {
   
3. /* Enables the clock for the I/O controller.: Enable Clock. */
   
4. CLOCK_EnableClock(kCLOCK_Iocon);
   
5. /* Enables the clock for the GPIO1 module */
   
6. CLOCK_EnableClock(kCLOCK_Gpio1);
   
7. gpio_pin_config_t LED_BULE_config = {
   
8. .pinDirection = kGPIO_DigitalOutput,
   
9. .outputLogic = 0U
   
10. };
    
11. /* Initialize GPIO functionality on pin PIO1_4 (pin 1)  */
    
12. GPIO_PinInit(GPIO, 1U, 4U, 1u <<4U);
    
13. GPIO_PinInit(GPIO, 1U, 6U, 1u <<6U);
    
14. GPIO_PinInit(GPIO, 1U, 7U, 1u <<7U);
    
15. const uint32_t port0_pin10_config = (/* Pin is configured as SWO */
    
16. IOCON_PIO_FUNC6 |
    
17. /* No addition pin function */
    
18. IOCON_PIO_MODE_INACT |
    
19. /* Standard mode, output slew rate control is enabled */
    
20. IOCON_PIO_SLEW_STANDARD |
    
21. /* Input function is not inverted */
    
22. IOCON_PIO_INV_DI |
    
23. /* Enables digital function */
    
24. IOCON_PIO_DIGITAL_EN |
    
25. /* Open drain is disabled */
    
26. IOCON_PIO_OPENDRAIN_DI |
    
27. /* Analog switch is disabled */
    
28. IOCON_PIO_ASW_DIS_DI);
    
29. /* PORT0 PIN10 (coords: 21) is configured as SWO */
    
30. IOCON_PinMuxSet(IOCON, 0U, 10U, port0_pin10_config);
    
31. const uint32_t LEDS = (/* Pin is configured as PIO1_4 */
    
32. IOCON_PIO_FUNC0 |
    
33. /* Selects pull-up function */
    
34. IOCON_PIO_MODE_PULLUP |
    
35. /* Standard mode, output slew rate control is enabled */
    
36. IOCON_PIO_SLEW_STANDARD |
    
37. /* Input function is not inverted */
    
38. IOCON_PIO_INV_DI |
    
39. /* Enables digital function */
    
40. IOCON_PIO_DIGITAL_EN |
    
41. /* Open drain is disabled */
    
42. IOCON_PIO_OPENDRAIN_DI);
    
43. /* PORT1 PIN4 (coords: 1) is configured as PIO1_4 */
    
44. IOCON_PinMuxSet(IOCON, 1U, 4U, LEDS);
    
45. IOCON_PinMuxSet(IOCON, 1U, 6U, LEDS);
    
46. IOCON_PinMuxSet(IOCON, 1U, 7U, LEDS);
    
47. }

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控制LED灯依次点亮的主程序如下：

1. int main(void)
   
2. {
   
3. /* Init output LED GPIO. */
   
4. GPIO_PortInit(GPIO, 1U);
   
5. /* set BOD VBAT level to 1.65V */
   
6. POWER_SetBodVbatLevel(kPOWER_BodVbatLevel1650mv, kPOWER_BodHystLevel50mv, false);
   
7. LEDS_InitPins();
   
8. SystemCoreClockUpdate();
   
9. /* Set systick reload value to generate 1ms interrupt */
   
10. if (SysTick_Config(SystemCoreClock / 1000U))
    
11. {
    
12. while (1)
    
13. {
    
14. }
    
15. }
    
16. while (1)
    
17. {
    
18. GPIO_PortClear(GPIO, 1U, 1u <<4U);//RED
    
19. SysTick_DelayTicks(1000U);
    
20. GPIO_PortSet(GPIO, 1U, 1u <<4U);
    
21. SysTick_DelayTicks(1000U);
    
22. 
    
23.                               GPIO_PortClear(GPIO, 1U, 1u <<6U);//BLUE
    
24. SysTick_DelayTicks(1000U);
    
25. GPIO_PortSet(GPIO, 1U, 1u <<6U);
    
26. SysTick_DelayTicks(1000U);
    
27. 
    
28.                               GPIO_PortClear(GPIO, 1U, 1u <<7U);//GREEN
    
29. SysTick_DelayTicks(1000U);
    
30. GPIO_PortSet(GPIO, 1U, 1u <<7U);
    
31. SysTick_DelayTicks(1000U);
    
32. }
    
33. }

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编译下载后，其运行效果如图2所示。

图2  LED灯控制效果

目标代码：