OKdo E1开发板之按键控制LED灯

ID:776997 · 发表于 2020-11-3 10:17

在OKdo E1开发板上配置了LED和KEY，通过它们可以学习和掌握I/O口的使用方法，其原理图见图1所示。

图1 LED和KEY原理图

由此我们可以获知它们与MCU的连接关系如下：

LEDR ---PIO1_4

LEDB ---PIO1_6

LEDG ---PIO1_7

WAKEUP--- PIO1_18

USER --- PIO1_9

ISP --- PIO0_5

为此LED和KEY的初始定义如下：

LED的引脚定义：

#defineLEDR_PORT 1u

#defineLEDR_PIN 4u

#defineLEDR_FUNC (IOCON_FUNC0 | IOCON_MODE_PULLUP |IOCON_DIGITAL_EN)

#defineLEDG_PORT 1u

#defineLEDG_PIN 7u

#defineLEDG_FUNC (IOCON_FUNC0 | IOCON_MODE_PULLUP | IOCON_DIGITAL_EN)

#defineLEDB_PORT 1u

#defineLEDB_PIN 6u

#defineLEDB_FUNC (IOCON_FUNC0 | IOCON_MODE_PULLUP |IOCON_DIGITAL_EN)

#defineLEDR_NUM 1u

#defineLEDG_NUM 2u

#defineLEDB_NUM 3u

KEY的引脚定义：

#defineKEY_S2_PORT 0u

#defineKEY_S2_PIN 5u

#defineKEY_S2_FUNC (IOCON_FUNC0 |IOCON_MODE_PULLUP | IOCON_DIGITAL_EN)

#defineKEY_S3_PORT 1u

#defineKEY_S3_PIN 18u

#defineKEY_S3_FUNC (IOCON_FUNC0 | IOCON_MODE_PULLUP| IOCON_DIGITAL_EN)

#defineKEY_S1_PORT 1u

#defineKEY_S1_PIN 9u

#defineKEY_S1_FUNC (IOCON_FUNC0 |IOCON_MODE_PULLUP | IOCON_DIGITAL_EN)

#defineKEY2_NUM 0x02

#defineKEY3_NUM 0x01

#define KEY1_NUM 0x04

LED的初始化函数：

void led_init(void)
{
gpio_pin_config_t gpioPinConfig;
gpioPinConfig.pinDirection = kGPIO_DigitalOutput;
gpioPinConfig.outputLogic = 1u; /* output high as default. */
GPIO_PinInit (GPIO, LEDR_PORT, LEDR_PIN, &gpioPinConfig);
GPIO_PinInit (GPIO, LEDG_PORT, LEDG_PIN, &gpioPinConfig);
GPIO_PinInit (GPIO, LEDB_PORT, LEDB_PIN, &gpioPinConfig);
}

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KEY的初始化函数：

void key_init(void)
{
static uint32_t i = 0;
gpio_pin_config_t gpioPinConfig;
gpioPinConfig.pinDirection = kGPIO_DigitalInput;
gpioPinConfig.outputLogic = 1u;
CLOCK_EnableClock(kCLOCK_Iocon);
IOCON->PIO[KEY_S2_PORT][KEY_S2_PIN] = KEY_S2_FUNC;
IOCON->PIO[KEY_S3_PORT][KEY_S3_PIN] = KEY_S3_FUNC;
IOCON->PIO[KEY_S1_PORT][KEY_S1_PIN] = KEY_S1_FUNC;
CLOCK_DisableClock(kCLOCK_Iocon);
GPIO_PinInit (GPIO, KEY_S2_PORT, KEY_S2_PIN, &gpioPinConfig);
GPIO_PinInit (GPIO, KEY_S3_PORT, KEY_S3_PIN, &gpioPinConfig);
GPIO_PinInit (GPIO, KEY_S1_PORT, KEY_S1_PIN, &gpioPinConfig);
}

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KEY控制LED的主程序：

int main(void)
{
volatile uint8_t s_KeyValue = 0;
POWER_SetBodVbatLevel(kPOWER_BodVbatLevel1650mv, kPOWER_BodHystLevel50mv, false);
CLOCK_EnableClock(kCLOCK_Gpio0);
CLOCK_EnableClock(kCLOCK_Gpio1);
BOARD_BootClockFROHF96M();
led_init();
key_init();
while (1)
{
s_KeyValue = key_read();
if( (s_KeyValue&KEY2_NUM) == KEY2_NUM) // ISP
{
led_set(LEDR_NUM, 0);
}
else
{
led_set(LEDR_NUM, 1);
}
if( (s_KeyValue&KEY3_NUM) == KEY3_NUM) // WAKE
{
led_set(LEDG_NUM, 0);
}
else
{
led_set(LEDG_NUM, 1);
}
if( (s_KeyValue&KEY1_NUM) == KEY1_NUM) // USER
{
led_set(LEDB_NUM, 0);
}
else
{
led_set(LEDB_NUM, 1);
}
}
}

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经编译下载，其运行效果如图2~图4所示。

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OKdo E1开发板之按键控制LED灯

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