英飞凌IO学习总结

1、一 端口引脚通用结构图PORTn->HWSEL 引脚硬件选择寄存器 PORTn->PPS 引脚省电寄存器PORTn->IOCR 输入输出控制寄存器 PORTn->PHCR 焊盘滞后控制寄存器PORTn->IN 输入寄存器 PORTn->OMR 输出修改寄存器PORTn->OUT 输出寄存器二寄存器操作（1）输入模式（前四个直接输入，后四个反相输入）端口引脚的电压通过焊盘内的施密特触发器被转换逻辑电平0或1，可以选择将该电平反相输入或直接输入，Pn_IN读取。还可以通过ALTIN连接多个片内外设。通过控制PORTn->IOCR来控制输入模式，Pn_

2、IN和ALTIN始终都是代表输入，与引脚配置成输入输出无关。#define INPUT 0x00U 不激活上/下拉器件#define INPUT_PD 0x08U 激活下拉#define INPUT_PU 0x10U 激活上拉（高）#define INPUT_PPS 0x18U 不激活，Pn_OUT连续采样输入值#define INPUT_INV 0x20U 不激活上/下拉器件#define INPUT_INV_PD 0x28U 激活下拉#define INPUT_INV_PU 0x30U 激活上拉#define INPUT_INV_PPS 0x38U 不激活，Pn_OUT连续采样输入例如：_

3、STATIC_INLINE void P0_0_set_mode(uint8_t mode) PORT0->IOCR0 &= 0x000000f8UL; PORT0->IOCR0 |= mode << 0;_STATIC_INLINE void P0_0_set_standard_hysteresis() PORT0->PHCR0 &= 0x00000004UL;_STATIC_INLINE void P0_0_set_large_hysteresis() PORT0->PHCR0 |= 0x00000004UL;（2）输出模式配置PORTn

4、->IOCR来选择输出模式，通过PORTn->OUT输出结果。如果要修改输出，应该配置PORTn->OMR，这样不会影响PORTn->OUT的其他位。#define OUTPUT_PP_GP 0x80U 推挽通用输出#define OUTPUT_PP_AF1 0x88U 推挽复用1#define OUTPUT_PP_AF2 0x90U#define OUTPUT_PP_AF3 0x98U#define OUTPUT_PP_AF4 0xA0U#define OUTPUT_PP_AF5 0xA8U#define OUTPUT_PP_AF6 0xB0U#define OUTP

5、UT_PP_AF7 0xB8U 推挽复用7#define OUTPUT_OD_GP 0xC0U 开漏通用处处#define OUTPUT_OD_AF1 0xC8U 开漏复用1#define OUTPUT_OD_AF2 0xD0U#define OUTPUT_OD_AF3 0xD8U#define OUTPUT_OD_AF4 0XE0U#define OUTPUT_OD_AF5 0xE8U#define OUTPUT_OD_AF6 0xF0U#define OUTPUT_OD_AF7 0XF8U 开漏复用7 _STATIC_INLINE void P0_0_set(void) PORT0->

6、;OMR = 0x00000001UL;_STATIC_INLINE void P0_0_reset(void) PORT0->OMR = 0x00010000UL;_STATIC_INLINE void P0_0_toggle(void) PORT0->OMR = 0x00010001UL;（3）硬件控制的IOPORTn->HWSEL允许选择不同的硬件”主机。例如：_STATIC_INLINE void P0_0_set_hwsel(uint32_t config)PORT0->HWSEL &= 0x00000003UL;PORT0->HWSEL |=

7、config << 0;（4）省电模式例如：_STATIC_INLINE void P0_0_enable_pps(void) PORT0->PPS |= 0x00000001UL;_STATIC_INLINE void P0_0_disable_pps(void) PORT0->PPS &= 0x00000001UL;三IO口操作流程示例#include <XMC1300.h>#include "PORTS.h"void PORTS_vInit(void)SCU_GENERAL->PASSWD = 0x000000C0UL;SCU_CLK->CLKCR = 0x3FF00400UL;/ 8 MHz MCLK, 8 MHz PCLKwhile(SCU_CLK->CLKCR)&0x40000000UL);/ 等待VDDC电压稳定SCU_GENERAL->PASSWD = 0x000000C3UL; P0_0_set_mode(INPUT); / P0_0为不激活拉器件输入P0_1_set_mode(OUTPUT_PP_GP); / 推挽通用输出P0_6_set_mode(OUTPUT_PP_GP); /P0_7_set_mode(OUTPUT_PP_GP); /void POR