关于lpc824两个gpio函数的用法

jyysns · 发表于 2019-8-10 16:14:25

新手请教，我找到了两个读取gpio电平的函数，请问这两个函数有什么区别。另外请问函数里的参数（LPC_GPIO_T *pGPIO和uint8_t pin）怎么得到，我只知道uint8_t port可以看原理图得到。
/**
* @brief Get a GPIO pin state via the GPIO byte register
* @param pGPIO : The base of GPIO peripheral on the chip
* @param port : GPIO port to read (supports port 0 only)
* @param pin : GPIO pin to get state for
* @return true if the GPIO is high, false if low
* @note This function replaces Chip_GPIO_ReadPortBit()
*/
STATIC INLINE bool Chip_GPIO_PinGetState(LPC_GPIO_T *pGPIO, uint8_t port, uint8_t pin)
{
return (bool) pGPIO->B[port][pin];
}
/**
* @brief Get a GPIO pin state via the GPIO byte register
* @param pGPIO : The base of GPIO peripheral on the chip
* @param port : GPIO port to read (supports port 0 only)
* @param pin : GPIO pin to get state for
* @return true if the GPIO is high, false if low
* @note This function replaces Chip_GPIO_ReadPortBit()
*/
STATIC INLINE void Chip_GPIO_PinToggleState(LPC_GPIO_T *pGPIO, uint8_t port, uint8_t pin)
{
pGPIO->NOT[port] = 1UL << pin;
}