器材
- 1x Tequila Nano + RA_LINK 调试器
电路连接
不需要进行额外连线
原理
Tequila Nano 的 PA2 针脚上连接板上自带的蓝色 LED 灯。LED 为 开漏连接，一端连接 3V3 电源，另一端连到 PA2 引脚，因此我们可以通过 GPIO 的开漏或推挽模式进行控制
Tequila Nano 上的蓝色 LED
代码
/**C
* @file main.c
* @version 1.0
* @date 2021-07-27
*
* The onboard LED for RATH Tequila Nano is connected to PA2, with the other end connected to
* 3V3. Thus, pulling the pin to LOW will turn on the LED, while pulling the pin to HIGH will
* turn off the LED.
*
*/
#include "rath_hal.h"
static void AG_RCU_init(void);
static void AG_GPIO_init(void);
int main(void) {
AG_RCU_init();
AG_GPIO_init();
while (1) {
/* set the pin to output low voltage, thus turn ON the LED */
HAL_GPIO_writePin(GPIOA, GPIO_PIN_2, LOW);
/* delay for 0.1 second */
HAL_delay(100);
/* set the pin to output high voltage, thus turn OFF the LED */
HAL_GPIO_writePin(GPIOA, GPIO_PIN_2, HIGH);
/* delay for 0.1 second */
HAL_delay(100);
}
}
static void AG_RCU_init(void) {
HAL_RCU_resetPeriphClock(RCU_GPIOA);
HAL_RCU_enablePeriphClock(RCU_GPIOA);
}
static void AG_GPIO_init(void) {
GPIO_InitTypeDef GPIO_init;
/* configure PA2 as output open drain */
GPIO_init.pin = GPIO_PIN_2;
GPIO_init.mode = GPIO_MODE_OUTPUT_OD;
GPIO_init.speed = GPIO_SPEED_50MHZ;
GPIO_init.pull = GPIO_PULL_NONE;
HAL_GPIO_init(GPIOA, &GPIO_init);
}
