Discuz! Board

标题: 求助，请问INTENSET一个被重复赋值了四次，这样IN0-2不是被覆盖了吗，为何还能用？ [打印本页]

作者: XJing 时间: 2022-6-22 15:58
标题: 求助，请问INTENSET一个被重复赋值了四次，这样IN0-2不是被覆盖了吗，为何还能用？
void gpiote_init(void)
{

nrf_gpio_cfg_input(PCA10040_BUTTON1, NRF_GPIO_PIN_PULLUP);
nrf_gpio_cfg_input(PCA10040_BUTTON2, NRF_GPIO_PIN_PULLUP);
nrf_gpio_cfg_input(PCA10040_BUTTON3, NRF_GPIO_PIN_PULLUP);
nrf_gpio_cfg_input(PCA10040_BUTTON4, NRF_GPIO_PIN_PULLUP);

NVIC_EnableIRQ(GPIOTE_IRQn); /* Enable Interrupt */

NRF_GPIOTE->CONFIG[0] = (GPIOTE_CONFIG_MODE_Event << GPIOTE_CONFIG_MODE_Pos) | (PCA10040_BUTTON1 << GPIOTE_CONFIG_PSEL_Pos) |(GPIOTE_CONFIG_POLARITY_HiToLo << GPIOTE_CONFIG_POLARITY_Pos);
NRF_GPIOTE->CONFIG[1] = (GPIOTE_CONFIG_MODE_Event << GPIOTE_CONFIG_MODE_Pos) | (PCA10040_BUTTON2 << GPIOTE_CONFIG_PSEL_Pos) |(GPIOTE_CONFIG_POLARITY_HiToLo << GPIOTE_CONFIG_POLARITY_Pos);
NRF_GPIOTE->CONFIG[2] = (GPIOTE_CONFIG_MODE_Event << GPIOTE_CONFIG_MODE_Pos) | (PCA10040_BUTTON3 << GPIOTE_CONFIG_PSEL_Pos) |(GPIOTE_CONFIG_POLARITY_HiToLo << GPIOTE_CONFIG_POLARITY_Pos);
NRF_GPIOTE->CONFIG[3] = (GPIOTE_CONFIG_MODE_Event << GPIOTE_CONFIG_MODE_Pos) | (PCA10040_BUTTON4 << GPIOTE_CONFIG_PSEL_Pos) |(GPIOTE_CONFIG_POLARITY_HiToLo << GPIOTE_CONFIG_POLARITY_Pos);

NRF_GPIOTE->INTENSET = GPIOTE_INTENSET_IN0_Set << GPIOTE_INTENSET_IN0_Pos;
NRF_GPIOTE->INTENSET = GPIOTE_INTENSET_IN1_Set << GPIOTE_INTENSET_IN1_Pos;
NRF_GPIOTE->INTENSET = GPIOTE_INTENSET_IN2_Set << GPIOTE_INTENSET_IN2_Pos;
NRF_GPIOTE->INTENSET = GPIOTE_INTENSET_IN3_Set << GPIOTE_INTENSET_IN3_Pos;

}

作者: XJing 时间: 2023-1-12 21:56
本帖最后由 XJing 于 2023-1-12 21:58 编辑

鉴于这么久没人理我，我自己回复一下初学时的低级问题，这个寄存器只管开门不管关门，置零没啥用，请和INTENCLR搭配使用。

欢迎光临 Discuz! Board (http://qfv8.com/)