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STC 32-bit 8051 single chip microcomputer development example tutorial II i/o working mode and its configuration
2022-07-01 19:59:00 【Bill66】
1. I/O Working mode STC 32G Series MCU has at most 64Pin Pin , At most 60 individual I/O mouth . As shown in the figure below ：
STC32G A series of single chip computers I/O Every mouth has 4 Working mode ： Quasi two-way port （ Weak pull-up ）、 Push pull output （ Strong pull up ）、 High impedance input （ Current cannot flow in or out ）、 Open drain output .P30、P31 The power on reset state is quasi bidirectional （ Weak pull-up ） Pattern , rest I/O The power on reset state of the port is high resistance input , This is related to STC15 series , Somewhat different .
To use I/O Port configuration required I/O Working mode of port ,STC32G Besides the port configuration register related to the working mode configuration （PxM0、PxM1）、 Outside the port data register Px, There is also a port pull-up resistor control register （enable/disable Inside 4.1K Pull up resistance ）PxPU、 Port Schmidt trigger control register （enable/disable Schmidt trigger function ）PxNCS、 Port level conversion speed control register （ Make the conversion speed switch fast or slow ）、 Port drive current control register （ Enable the port drive capability to switch between general drive capability and enhanced drive capability ）PxSR、 Port digital signal input enable control register （enable/disable Digital signal input ）PxIE、 Port pull-down resistance control register （enable/disable Inside 10K Pull down resistance ）. a STC15 Series single chip microcomputer is much more complicated .
STC32G A series of single chip computers I/O The working mode of the port is through the port configuration register （PxM0、PxM1） To configure the , The configuration method is as follows ：
2. Under different working modes I/O chart
STC32G Quasi bidirectional of Series MCU I/O Structure diagram is as follows ：
STC32G Push pull output of Series MCU I/O Structure diagram is as follows ：
STC32G High resistance input of Series MCU I/O Structure diagram is as follows ：
STC32G Leakage opening of series single chip microcomputer I/O Structure diagram is as follows ：
STC32G Series single chip microcomputer is relative to STC8 position 8051 SCM added 4.1K Pull up the resistance on 10K Pull down resistance , as follows ：
4. Library function STC The official website provides STC32G The latest library function of is 4 edition , The date of issue is 2022 year 6 month 9 Number . Download after decompression , stay library The files visible under the folder are as follows ：
among STC32G_GPIO.h The code for is as follows ：
/*---------------------------------------------------------------------*/
/* --- STC MCU Limited ------------------------------------------------*/
/* --- STC 1T Series MCU Demo Programme -------------------------------*/
/* --- Mobile: (86)13922805190 ----------------------------------------*/
/* --- Fax: 86-0513-55012956,55012947,55012969 ------------------------*/
/* --- Tel: 86-0513-55012928,55012929,55012966 ------------------------*/
/* --- Web: www.STCMCU.com --------------------------------------------*/
/* --- Web: www.STCMCUDATA.com ---------------------------------------*/
/* --- QQ: 800003751 -------------------------------------------------*/
/* If you want to use... In this program , Please indicate in the procedure that the STC Information and procedures */
/*---------------------------------------------------------------------*/
#ifndef __STC32G_GPIO_H
#define __STC32G_GPIO_H
#include "config.h"
//========================================================================
// Port mode settings
//========================================================================
// Quasi two-way port
#define P0_MODE_IO_PU(Pin) {P0M1 &= ~(Pin), P0M0 &= ~(Pin);}
#define P1_MODE_IO_PU(Pin) {P1M1 &= ~(Pin), P1M0 &= ~(Pin);}
#define P2_MODE_IO_PU(Pin) {P2M1 &= ~(Pin), P2M0 &= ~(Pin);}
#define P3_MODE_IO_PU(Pin) {P3M1 &= ~(Pin), P3M0 &= ~(Pin);}
#define P4_MODE_IO_PU(Pin) {P4M1 &= ~(Pin), P4M0 &= ~(Pin);}
#define P5_MODE_IO_PU(Pin) {P5M1 &= ~(Pin), P5M0 &= ~(Pin);}
#define P6_MODE_IO_PU(Pin) {P6M1 &= ~(Pin), P6M0 &= ~(Pin);}
#define P7_MODE_IO_PU(Pin) {P7M1 &= ~(Pin), P7M0 &= ~(Pin);}
// High impedance input
#define P0_MODE_IN_HIZ(Pin) {P0M1 |= (Pin), P0M0 &= ~(Pin);}
#define P1_MODE_IN_HIZ(Pin) {P1M1 |= (Pin), P1M0 &= ~(Pin);}
#define P2_MODE_IN_HIZ(Pin) {P2M1 |= (Pin), P2M0 &= ~(Pin);}
#define P3_MODE_IN_HIZ(Pin) {P3M1 |= (Pin), P3M0 &= ~(Pin);}
#define P4_MODE_IN_HIZ(Pin) {P4M1 |= (Pin), P4M0 &= ~(Pin);}
#define P5_MODE_IN_HIZ(Pin) {P5M1 |= (Pin), P5M0 &= ~(Pin);}
#define P6_MODE_IN_HIZ(Pin) {P6M1 |= (Pin), P6M0 &= ~(Pin);}
#define P7_MODE_IN_HIZ(Pin) {P7M1 |= (Pin), P7M0 &= ~(Pin);}
// Open drain
#define P0_MODE_OUT_OD(Pin) {P0M1 |= (Pin), P0M0 |= (Pin);}
#define P1_MODE_OUT_OD(Pin) {P1M1 |= (Pin), P1M0 |= (Pin);}
#define P2_MODE_OUT_OD(Pin) {P2M1 |= (Pin), P2M0 |= (Pin);}
#define P3_MODE_OUT_OD(Pin) {P3M1 |= (Pin), P3M0 |= (Pin);}
#define P4_MODE_OUT_OD(Pin) {P4M1 |= (Pin), P4M0 |= (Pin);}
#define P5_MODE_OUT_OD(Pin) {P5M1 |= (Pin), P5M0 |= (Pin);}
#define P6_MODE_OUT_OD(Pin) {P6M1 |= (Pin), P6M0 |= (Pin);}
#define P7_MODE_OUT_OD(Pin) {P7M1 |= (Pin), P7M0 |= (Pin);}
// Push pull output
#define P0_MODE_OUT_PP(Pin) {P0M1 &= ~(Pin), P0M0 |= (Pin);}
#define P1_MODE_OUT_PP(Pin) {P1M1 &= ~(Pin), P1M0 |= (Pin);}
#define P2_MODE_OUT_PP(Pin) {P2M1 &= ~(Pin), P2M0 |= (Pin);}
#define P3_MODE_OUT_PP(Pin) {P3M1 &= ~(Pin), P3M0 |= (Pin);}
#define P4_MODE_OUT_PP(Pin) {P4M1 &= ~(Pin), P4M0 |= (Pin);}
#define P5_MODE_OUT_PP(Pin) {P5M1 &= ~(Pin), P5M0 |= (Pin);}
#define P6_MODE_OUT_PP(Pin) {P6M1 &= ~(Pin), P6M0 |= (Pin);}
#define P7_MODE_OUT_PP(Pin) {P7M1 &= ~(Pin), P7M0 |= (Pin);}
//========================================================================
// Port internal 4.1K Pull up settings
//========================================================================
// Pull up enable
#define P0_PULL_UP_ENABLE(Pin) P0PU |= (Pin)
#define P1_PULL_UP_ENABLE(Pin) P1PU |= (Pin)
#define P2_PULL_UP_ENABLE(Pin) P2PU |= (Pin)
#define P3_PULL_UP_ENABLE(Pin) P3PU |= (Pin)
#define P4_PULL_UP_ENABLE(Pin) P4PU |= (Pin)
#define P5_PULL_UP_ENABLE(Pin) P5PU |= (Pin)
#define P6_PULL_UP_ENABLE(Pin) P6PU |= (Pin)
#define P7_PULL_UP_ENABLE(Pin) P7PU |= (Pin)
// Pull up forbidden
#define P0_PULL_UP_DISABLE(Pin) P0PU &= ~(Pin)
#define P1_PULL_UP_DISABLE(Pin) P1PU &= ~(Pin)
#define P2_PULL_UP_DISABLE(Pin) P2PU &= ~(Pin)
#define P3_PULL_UP_DISABLE(Pin) P3PU &= ~(Pin)
#define P4_PULL_UP_DISABLE(Pin) P4PU &= ~(Pin)
#define P5_PULL_UP_DISABLE(Pin) P5PU &= ~(Pin)
#define P6_PULL_UP_DISABLE(Pin) P6PU &= ~(Pin)
#define P7_PULL_UP_DISABLE(Pin) P7PU &= ~(Pin)
//========================================================================
// Port Schmidt trigger setting
//========================================================================
// Schmidt trigger enable
#define P0_ST_ENABLE(Pin) P0NCS &= ~(Pin)
#define P1_ST_ENABLE(Pin) P1NCS &= ~(Pin)
#define P2_ST_ENABLE(Pin) P2NCS &= ~(Pin)
#define P3_ST_ENABLE(Pin) P3NCS &= ~(Pin)
#define P4_ST_ENABLE(Pin) P4NCS &= ~(Pin)
#define P5_ST_ENABLE(Pin) P5NCS &= ~(Pin)
#define P6_ST_ENABLE(Pin) P6NCS &= ~(Pin)
#define P7_ST_ENABLE(Pin) P7NCS &= ~(Pin)
// Schmidt trigger inhibit
#define P0_ST_DISABLE(Pin) P0NCS |= (Pin)
#define P1_ST_DISABLE(Pin) P1NCS |= (Pin)
#define P2_ST_DISABLE(Pin) P2NCS |= (Pin)
#define P3_ST_DISABLE(Pin) P3NCS |= (Pin)
#define P4_ST_DISABLE(Pin) P4NCS |= (Pin)
#define P5_ST_DISABLE(Pin) P5NCS |= (Pin)
#define P6_ST_DISABLE(Pin) P6NCS |= (Pin)
#define P7_ST_DISABLE(Pin) P7NCS |= (Pin)
//========================================================================
// Port level conversion speed setting
//========================================================================
// Level conversion is slow , The corresponding up and down rush is relatively small
#define P0_SPEED_LOW(Pin) P0SR |= (Pin)
#define P1_SPEED_LOW(Pin) P1SR |= (Pin)
#define P2_SPEED_LOW(Pin) P2SR |= (Pin)
#define P3_SPEED_LOW(Pin) P3SR |= (Pin)
#define P4_SPEED_LOW(Pin) P4SR |= (Pin)
#define P5_SPEED_LOW(Pin) P5SR |= (Pin)
#define P6_SPEED_LOW(Pin) P6SR |= (Pin)
#define P7_SPEED_LOW(Pin) P7SR |= (Pin)
// Fast level conversion , The corresponding up and down rush is relatively large
#define P0_SPEED_HIGH(Pin) P0SR &= ~(Pin)
#define P1_SPEED_HIGH(Pin) P1SR &= ~(Pin)
#define P2_SPEED_HIGH(Pin) P2SR &= ~(Pin)
#define P3_SPEED_HIGH(Pin) P3SR &= ~(Pin)
#define P4_SPEED_HIGH(Pin) P4SR &= ~(Pin)
#define P5_SPEED_HIGH(Pin) P5SR &= ~(Pin)
#define P6_SPEED_HIGH(Pin) P6SR &= ~(Pin)
#define P7_SPEED_HIGH(Pin) P7SR &= ~(Pin)
//========================================================================
// Port drive current control settings
//========================================================================
// General drive capability
#define P0_DRIVE_MEDIUM(Pin) P0DR |= (Pin)
#define P1_DRIVE_MEDIUM(Pin) P1DR |= (Pin)
#define P2_DRIVE_MEDIUM(Pin) P2DR |= (Pin)
#define P3_DRIVE_MEDIUM(Pin) P3DR |= (Pin)
#define P4_DRIVE_MEDIUM(Pin) P4DR |= (Pin)
#define P5_DRIVE_MEDIUM(Pin) P5DR |= (Pin)
#define P6_DRIVE_MEDIUM(Pin) P6DR |= (Pin)
#define P7_DRIVE_MEDIUM(Pin) P7DR |= (Pin)
// Enhance driving capability
#define P0_DRIVE_HIGH(Pin) P0DR &= ~(Pin)
#define P1_DRIVE_HIGH(Pin) P1DR &= ~(Pin)
#define P2_DRIVE_HIGH(Pin) P2DR &= ~(Pin)
#define P3_DRIVE_HIGH(Pin) P3DR &= ~(Pin)
#define P4_DRIVE_HIGH(Pin) P4DR &= ~(Pin)
#define P5_DRIVE_HIGH(Pin) P5DR &= ~(Pin)
#define P6_DRIVE_HIGH(Pin) P6DR &= ~(Pin)
#define P7_DRIVE_HIGH(Pin) P7DR &= ~(Pin)
//========================================================================
// Port digital signal input enable
//========================================================================
// Enable digital signal input
#define P0_DIGIT_IN_ENABLE(Pin) P0IE |= (Pin)
#define P1_DIGIT_IN_ENABLE(Pin) P1IE |= (Pin)
#define P2_DIGIT_IN_ENABLE(Pin) P2IE |= (Pin)
#define P3_DIGIT_IN_ENABLE(Pin) P3IE |= (Pin)
#define P4_DIGIT_IN_ENABLE(Pin) P4IE |= (Pin)
#define P5_DIGIT_IN_ENABLE(Pin) P5IE |= (Pin)
#define P6_DIGIT_IN_ENABLE(Pin) P6IE |= (Pin)
#define P7_DIGIT_IN_ENABLE(Pin) P7IE |= (Pin)
// Prohibit digital signal input
#define P0_DIGIT_IN_DISABLE(Pin) P0IE &= ~(Pin)
#define P1_DIGIT_IN_DISABLE(Pin) P1IE &= ~(Pin)
#define P2_DIGIT_IN_DISABLE(Pin) P2IE &= ~(Pin)
#define P3_DIGIT_IN_DISABLE(Pin) P3IE &= ~(Pin)
#define P4_DIGIT_IN_DISABLE(Pin) P4IE &= ~(Pin)
#define P5_DIGIT_IN_DISABLE(Pin) P5IE &= ~(Pin)
#define P6_DIGIT_IN_DISABLE(Pin) P6IE &= ~(Pin)
#define P7_DIGIT_IN_DISABLE(Pin) P7IE &= ~(Pin)
//========================================================================
// Definition statement
//========================================================================
#define GPIO_PullUp 0 // Pull up the quasi two-way opening
#define GPIO_HighZ 1 // Floating input
#define GPIO_OUT_OD 2 // Open drain output
#define GPIO_OUT_PP 3 // Push pull output
#define GPIO_Pin_0 0x01 //IO Pin Px.0
#define GPIO_Pin_1 0x02 //IO Pin Px.1
#define GPIO_Pin_2 0x04 //IO Pin Px.2
#define GPIO_Pin_3 0x08 //IO Pin Px.3
#define GPIO_Pin_4 0x10 //IO Pin Px.4
#define GPIO_Pin_5 0x20 //IO Pin Px.5
#define GPIO_Pin_6 0x40 //IO Pin Px.6
#define GPIO_Pin_7 0x80 //IO Pin Px.7
#define GPIO_Pin_LOW 0x0F //IO low 4 Bit pin
#define GPIO_Pin_HIGH 0xF0 //IO high 4 Bit pin
#define GPIO_Pin_All 0xFF //IO All pins
#define GPIO_P0 0 //
#define GPIO_P1 1
#define GPIO_P2 2
#define GPIO_P3 3
#define GPIO_P4 4
#define GPIO_P5 5
#define GPIO_P6 6
#define GPIO_P7 7
typedef struct
{
u8 Mode; //IO Pattern , GPIO_PullUp,GPIO_HighZ,GPIO_OUT_OD,GPIO_OUT_PP
u8 Pin; // Port to set
} GPIO_InitTypeDef;
u8 GPIO_Inilize(u8 GPIO, GPIO_InitTypeDef *GPIOx);
#endif
STC32G_GPIO.c The code in is as follows ：
/*---------------------------------------------------------------------*/
/* --- STC MCU Limited ------------------------------------------------*/
/* --- STC 1T Series MCU Demo Programme -------------------------------*/
/* --- Mobile: (86)13922805190 ----------------------------------------*/
/* --- Fax: 86-0513-55012956,55012947,55012969 ------------------------*/
/* --- Tel: 86-0513-55012928,55012929,55012966 ------------------------*/
/* --- Web: www.STCMCU.com --------------------------------------------*/
/* --- Web: www.STCMCUDATA.com ---------------------------------------*/
/* --- QQ: 800003751 -------------------------------------------------*/
/* If you want to use... In this program , Please indicate in the procedure that the STC Information and procedures */
/*---------------------------------------------------------------------*/
#include "STC32G_GPIO.h"
//========================================================================
// function : u8 GPIO_Inilize(u8 GPIO, GPIO_InitTypeDef *GPIOx)
// describe : initialization IO mouth .
// Parameters : GPIOx: Structural parameters , Please refer to timer.h Definition in .
// return : Successfully returns SUCCESS, Erroneous return FAIL.
// edition : V1.0, 2012-10-22
//========================================================================
u8 GPIO_Inilize(u8 GPIO, GPIO_InitTypeDef *GPIOx)
{
if(GPIO > GPIO_P7) return FAIL; // error
if(GPIOx->Mode > GPIO_OUT_PP) return FAIL; // error
if(GPIO == GPIO_P0)
{
if(GPIOx->Mode == GPIO_PullUp) P0M1 &= ~GPIOx->Pin, P0M0 &= ~GPIOx->Pin; // Pull up the quasi two-way opening
if(GPIOx->Mode == GPIO_HighZ) P0M1 |= GPIOx->Pin, P0M0 &= ~GPIOx->Pin; // Floating input
if(GPIOx->Mode == GPIO_OUT_OD) P0M1 |= GPIOx->Pin, P0M0 |= GPIOx->Pin; // Open drain output
if(GPIOx->Mode == GPIO_OUT_PP) P0M1 &= ~GPIOx->Pin, P0M0 |= GPIOx->Pin; // Push pull output
}
if(GPIO == GPIO_P1)
{
if(GPIOx->Mode == GPIO_PullUp) P1M1 &= ~GPIOx->Pin, P1M0 &= ~GPIOx->Pin; // Pull up the quasi two-way opening
if(GPIOx->Mode == GPIO_HighZ) P1M1 |= GPIOx->Pin, P1M0 &= ~GPIOx->Pin; // Floating input
if(GPIOx->Mode == GPIO_OUT_OD) P1M1 |= GPIOx->Pin, P1M0 |= GPIOx->Pin; // Open drain output
if(GPIOx->Mode == GPIO_OUT_PP) P1M1 &= ~GPIOx->Pin, P1M0 |= GPIOx->Pin; // Push pull output
}
if(GPIO == GPIO_P2)
{
if(GPIOx->Mode == GPIO_PullUp) P2M1 &= ~GPIOx->Pin, P2M0 &= ~GPIOx->Pin; // Pull up the quasi two-way opening
if(GPIOx->Mode == GPIO_HighZ) P2M1 |= GPIOx->Pin, P2M0 &= ~GPIOx->Pin; // Floating input
if(GPIOx->Mode == GPIO_OUT_OD) P2M1 |= GPIOx->Pin, P2M0 |= GPIOx->Pin; // Open drain output
if(GPIOx->Mode == GPIO_OUT_PP) P2M1 &= ~GPIOx->Pin, P2M0 |= GPIOx->Pin; // Push pull output
}
if(GPIO == GPIO_P3)
{
if(GPIOx->Mode == GPIO_PullUp) P3M1 &= ~GPIOx->Pin, P3M0 &= ~GPIOx->Pin; // Pull up the quasi two-way opening
if(GPIOx->Mode == GPIO_HighZ) P3M1 |= GPIOx->Pin, P3M0 &= ~GPIOx->Pin; // Floating input
if(GPIOx->Mode == GPIO_OUT_OD) P3M1 |= GPIOx->Pin, P3M0 |= GPIOx->Pin; // Open drain output
if(GPIOx->Mode == GPIO_OUT_PP) P3M1 &= ~GPIOx->Pin, P3M0 |= GPIOx->Pin; // Push pull output
}
if(GPIO == GPIO_P4)
{
if(GPIOx->Mode == GPIO_PullUp) P4M1 &= ~GPIOx->Pin, P4M0 &= ~GPIOx->Pin; // Pull up the quasi two-way opening
if(GPIOx->Mode == GPIO_HighZ) P4M1 |= GPIOx->Pin, P4M0 &= ~GPIOx->Pin; // Floating input
if(GPIOx->Mode == GPIO_OUT_OD) P4M1 |= GPIOx->Pin, P4M0 |= GPIOx->Pin; // Open drain output
if(GPIOx->Mode == GPIO_OUT_PP) P4M1 &= ~GPIOx->Pin, P4M0 |= GPIOx->Pin; // Push pull output
}
if(GPIO == GPIO_P5)
{
if(GPIOx->Mode == GPIO_PullUp) P5M1 &= ~GPIOx->Pin, P5M0 &= ~GPIOx->Pin; // Pull up the quasi two-way opening
if(GPIOx->Mode == GPIO_HighZ) P5M1 |= GPIOx->Pin, P5M0 &= ~GPIOx->Pin; // Floating input
if(GPIOx->Mode == GPIO_OUT_OD) P5M1 |= GPIOx->Pin, P5M0 |= GPIOx->Pin; // Open drain output
if(GPIOx->Mode == GPIO_OUT_PP) P5M1 &= ~GPIOx->Pin, P5M0 |= GPIOx->Pin; // Push pull output
}
if(GPIO == GPIO_P6)
{
if(GPIOx->Mode == GPIO_PullUp) P6M1 &= ~GPIOx->Pin, P6M0 &= ~GPIOx->Pin; // Pull up the quasi two-way opening
if(GPIOx->Mode == GPIO_HighZ) P6M1 |= GPIOx->Pin, P6M0 &= ~GPIOx->Pin; // Floating input
if(GPIOx->Mode == GPIO_OUT_OD) P6M1 |= GPIOx->Pin, P6M0 |= GPIOx->Pin; // Open drain output
if(GPIOx->Mode == GPIO_OUT_PP) P6M1 &= ~GPIOx->Pin, P6M0 |= GPIOx->Pin; // Push pull output
}
if(GPIO == GPIO_P7)
{
if(GPIOx->Mode == GPIO_PullUp) P7M1 &= ~GPIOx->Pin, P7M0 &= ~GPIOx->Pin; // Pull up the quasi two-way opening
if(GPIOx->Mode == GPIO_HighZ) P7M1 |= GPIOx->Pin, P7M0 &= ~GPIOx->Pin; // Floating input
if(GPIOx->Mode == GPIO_OUT_OD) P7M1 |= GPIOx->Pin, P7M0 |= GPIOx->Pin; // Open drain output
if(GPIOx->Mode == GPIO_OUT_PP) P7M1 &= ~GPIOx->Pin, P7M0 |= GPIOx->Pin; // Push pull output
}
return SUCCESS; // success
}
Be careful STC32G_GPIO.h Contains header files config.h And custom data type symbols , Need from Independent_Programme The following two header files will be in the subdirectory under the folder Copy To library Under the folder , Otherwise the compilation will report an error .
The following is the library function I wrote myself , The header file is as follows ：
/*STC32G_GPIO.h
Designed by Bill Liu
Version 0.0
Modified last by Bill Liu on 06/23/2022
*/
#ifndef __STC32G_GPIO_H
#define __STC32G_GPIO_H
#include <STC32G.h>
#include "config.h"
#include "mtype.h"
//***************************************
typedef enum
{
PIN0 = 0x01,
PIN1 = 0x02,
PIN2 = 0x04,
PIN3 = 0x08,
PIN4 = 0x10,
PIN5 = 0x20,
PIN6 = 0x40,
PIN7 = 0x80
}IOPORT_PIN;
//***************************************
typedef enum
{
SCT_P0 = 0x01, //P0 port
SCT_P1 = 0x02, //P1 port
SCT_P2 = 0x04, //P2 port
SCT_P3 = 0x08, //P3 port
SCT_P4 = 0x10, //P4 port
SCT_P5 = 0x20, //P5 port
SCT_P6 = 0x40, //P6 port
SCT_P7 = 0x80 //P7 port
}STC32G_IOPORT;
//***************************************
typedef enum
{
BI_IO = 0, //bidirectional I/O
PP_OUT, //push_pull out
HI_IN, //high impendence in
ODR_OUT //open drain out
}STC32G_IOMODE;
/****************************************
Function: STC32G_P0PinsInit(ui8 pins, STC32G_IOMODE mode, BOOL pullUpEnable, BOOL pullDownEnable,BOOL drvEn,BOOL speedHi,BOOL dIEnable, BOOL sTEnable);
Return value: void
pins: pins to init,
mode: configure work mode
pullUpEnable: 0-pullup disable, 1-pull up enable
pullDownEnable: 0-pull down disable,1-pull down enable
drvEn: 1-drive ability enhance enable, 0-drive ability enhance disable
speedHi; 1- I/O speed high enable, 0- I/O speed high disable
dIEnable: 1- digital singal input enable, 0- digital singal input enable
sTEnable: 1-schmitt trigger enable, 0-schmitt trigger disable
Example:
STC32G_P0PinsInit(PIN0|PIN3, BI_IO, 0, 0,0,1,1,1);
****************************************/
void STC32G_P0PinsInit(ui8 pins, STC32G_IOMODE mode, BOOL pullUpEnable, BOOL pullDownEnable,BOOL drvEn,BOOL speedHi,BOOL dIEnable, BOOL sTEnable);
/****************************************
Function: STC32G_P1PinsInit(ui8 pins, STC32G_IOMODE mode, BOOL pullUpEnable, BOOL pullDownEnable,BOOL drvEn,BOOL speedHi,BOOL dIEnable, BOOL sTEnable);
Return value: void
pins: pins to init,
mode: configure work mode
pullUpEnable: 0-pullup disable, 1-pull up enable
pullDownEnable: 0-pull down disable,1-pull down enable
drvEn: 1-drive ability enhance enable, 0-drive ability enhance disable
speedHi; 1- I/O speed high enable, 0- I/O speed high disable
dIEnable: 1- digital singal input enable, 0- digital singal input enable
sTEnable: 1-schmitt trigger enable, 0-schmitt trigger disable
Example:
STC32G_P1PinsInit(PIN0|PIN3, BI_IO, 0, 0,0,1,1,1);
****************************************/
void STC32G_P1PinsInit(ui8 pins, STC32G_IOMODE mode, BOOL pullUpEnable, BOOL pullDownEnable,BOOL drvEn,BOOL speedHi,BOOL dIEnable, BOOL sTEnable);
/****************************************
Function: STC32G_P2PinsInit(ui8 pins, STC32G_IOMODE mode, BOOL pullUpEnable, BOOL pullDownEnable,BOOL drvEn,BOOL speedHi,BOOL dIEnable, BOOL sTEnable);
Return value: void
pins: pins to init,
mode: configure work mode
pullUpEnable: 0-pullup disable, 1-pull up enable
pullDownEnable: 0-pull down disable,1-pull down enable
drvEn: 1-drive ability enhance enable, 0-drive ability enhance disable
speedHi; 1- I/O speed high enable, 0- I/O speed high disable
dIEnable: 1- digital singal input enable, 0- digital singal input enable
sTEnable: 1-schmitt trigger enable, 0-schmitt trigger disable
Example:
STC32G_P2PinsInit(PIN0|PIN3, BI_IO, 0, 0,0,1,1,1);
****************************************/
void STC32G_P2PinsInit(ui8 pins, STC32G_IOMODE mode, BOOL pullUpEnable, BOOL pullDownEnable,BOOL drvEn,BOOL speedHi,BOOL dIEnable, BOOL sTEnable);
/****************************************
Function: STC32G_P3PinsInit(ui8 pins, STC32G_IOMODE mode, BOOL pullUpEnable, BOOL pullDownEnable,BOOL drvEn,BOOL speedHi,BOOL dIEnable, BOOL sTEnable);
Return value: void
pins: pins to init,
mode: configure work mode
pullUpEnable: 0-pullup disable, 1-pull up enable
pullDownEnable: 0-pull down disable,1-pull down enable
drvEn: 1-drive ability enhance enable, 0-drive ability enhance disable
speedHi; 1- I/O speed high enable, 0- I/O speed high disable
dIEnable: 1- digital singal input enable, 0- digital singal input enable
sTEnable: 1-schmitt trigger enable, 0-schmitt trigger disable
Example:
STC32G_P3PinsInit(PIN0|PIN3, BI_IO, 0, 0,0,1,1,1);
****************************************/
void STC32G_P3PinsInit(ui8 pins, STC32G_IOMODE mode, BOOL pullUpEnable, BOOL pullDownEnable,BOOL drvEn,BOOL speedHi,BOOL dIEnable, BOOL sTEnable);
/****************************************
Function: STC32G_P4PinsInit(ui8 pins, STC32G_IOMODE mode, BOOL pullUpEnable, BOOL pullDownEnable,BOOL drvEn,BOOL speedHi,BOOL dIEnable, BOOL sTEnable);
Return value: void
pins: pins to init,
mode: configure work mode
pullUpEnable: 0-pullup disable, 1-pull up enable
pullDownEnable: 0-pull down disable,1-pull down enable
drvEn: 1-drive ability enhance enable, 0-drive ability enhance disable
speedHi; 1- I/O speed high enable, 0- I/O speed high disable
dIEnable: 1- digital singal input enable, 0- digital singal input enable
sTEnable: 1-schmitt trigger enable, 0-schmitt trigger disable
Example:
STC32G_P4PinsInit(PIN0|PIN3, BI_IO, 0, 0,0,1,1,1);
****************************************/
void STC32G_P4PinsInit(ui8 pins, STC32G_IOMODE mode, BOOL pullUpEnable, BOOL pullDownEnable,BOOL drvEn,BOOL speedHi,BOOL dIEnable, BOOL sTEnable);
/****************************************
Function: STC32G_P5PinsInit(ui8 pins, STC32G_IOMODE mode, BOOL pullUpEnable, BOOL pullDownEnable,BOOL drvEn,BOOL speedHi,BOOL dIEnable, BOOL sTEnable);
Return value: void
pins: pins to init,
mode: configure work mode
pullUpEnable: 0-pullup disable, 1-pull up enable
pullDownEnable: 0-pull down disable,1-pull down enable
drvEn: 1-drive ability enhance enable, 0-drive ability enhance disable
speedHi; 1- I/O speed high enable, 0- I/O speed high disable
dIEnable: 1- digital singal input enable, 0- digital singal input enable
sTEnable: 1-schmitt trigger enable, 0-schmitt trigger disable
Example:
STC32G_P5PinsInit(PIN0|PIN3, BI_IO, 0, 0,0,1,1,1);
****************************************/
void STC32G_P5PinsInit(ui8 pins, STC32G_IOMODE mode, BOOL pullUpEnable, BOOL pullDownEnable,BOOL drvEn,BOOL speedHi,BOOL dIEnable, BOOL sTEnable);
/****************************************
Function: STC32G_P6PinsInit(ui8 pins, STC32G_IOMODE mode, BOOL pullUpEnable, BOOL pullDownEnable,BOOL drvEn,BOOL speedHi,BOOL dIEnable, BOOL sTEnable);
Return value: void
pins: pins to init,
mode: configure work mode
pullUpEnable: 0-pullup disable, 1-pull up enable
pullDownEnable: 0-pull down disable,1-pull down enable
drvEn: 1-drive ability enhance enable, 0-drive ability enhance disable
speedHi; 1- I/O speed high enable, 0- I/O speed high disable
dIEnable: 1- digital singal input enable, 0- digital singal input enable
sTEnable: 1-schmitt trigger enable, 0-schmitt trigger disable
Example:
STC32G_P6PinsInit(PIN0|PIN3, BI_IO, 0, 0,0,1,1,1);
****************************************/
void STC32G_P6PinsInit(ui8 pins, STC32G_IOMODE mode, BOOL pullUpEnable, BOOL pullDownEnable,BOOL drvEn,BOOL speedHi,BOOL dIEnable, BOOL sTEnable);
/****************************************
Function: STC32G_P7PinsInit(ui8 pins, STC32G_IOMODE mode, BOOL pullUpEnable, BOOL pullDownEnable,BOOL drvEn,BOOL speedHi,BOOL dIEnable, BOOL sTEnable);
Return value: void
pins: pins to init,
mode: configure work mode
pullUpEnable: 0-pullup disable, 1-pull up enable
pullDownEnable: 0-pull down disable,1-pull down enable
drvEn: 1-drive ability enhance enable, 0-drive ability enhance disable
speedHi; 1- I/O speed high enable, 0- I/O speed high disable
dIEnable: 1- digital singal input enable, 0- digital singal input enable
sTEnable: 1-schmitt trigger enable, 0-schmitt trigger disable
Example:
STC32G_P7PinsInit(PIN0|PIN3, BI_IO, 0, 0,0,1,1,1);
****************************************/
void STC32G_P7PinsInit(ui8 pins, STC32G_IOMODE mode, BOOL pullUpEnable, BOOL pullDownEnable,BOOL drvEn,BOOL speedHi,BOOL dIEnable, BOOL sTEnable);
/****************************************
Function: STC32G_PortsPinsInit(ui8 ports,ui8 pins, STC32G_IOMODE mode, BOOL pullUpEnable, BOOL pullDownEnable,BOOL drvEn,BOOL speedHi,BOOL dIEnable, BOOL sTEnable);
Return value: void
ports: ports to init
pins: pins to init,
mode: configure work mode
pullUpEnable: 0-pullup disable, 1-pull up enable
pullDownEnable: 0-pull down disable,1-pull down enable
drvEn: 1-drive ability enhance enable, 0-drive ability enhance disable
speedHi; 1- I/O speed high enable, 0- I/O speed high disable
dIEnable: 1- digital singal input enable, 0- digital singal input enable
sTEnable: 1-schmitt trigger enable, 0-schmitt trigger disable
Example:
STC32G_PortsPinsInit(SCT_P0|SCT_P1|SCT_P6,PIN0|PIN3, BI_IO, 0, 0,0,1,1,1);
****************************************/
void STC32G_PortsPinsInit(ui8 ports,ui8 pins, STC32G_IOMODE mode, BOOL pullUpEnable, BOOL pullDownEnable,BOOL drvEn,BOOL speedHi,BOOL dIEnable, BOOL sTEnable);
#endifThe source code of the library function is as follows ：
/*STC32G_GPIO.h
Designed by Bill Liu
Version 0.0
Modified last by Bill Liu on 06/23/2022
*/
#include "STC32G_GPIO.h"
//*********************************************************************************************************************************************/
void STC32G_P0PinsInit(ui8 pins, STC32G_IOMODE mode, BOOL pullUpEnable, BOOL pullDownEnable,BOOL drvEn,BOOL speedHi,BOOL dIEnable, BOOL sTEnable)
{
SysInit();
switch(mode)
{
case BI_IO:
P0M1 &= ~pins;
P0M0 &= ~pins;
break;
case PP_OUT:
P0M1 &= ~pins;
P0M0 |= pins;
break;
case HI_IN:
P0M1 |= pins;
P0M0 &= pins;
break;
case ODR_OUT:
P0M1 |= pins;
P0M0 |= pins;
break;
}
if(pullUpEnable)
P0PU |= pins;
else
P0PU &= ~pins;
if(pullDownEnable)
P0DR |= pins;
else
P0DR &= ~pins;
if(drvEn)
P0DR &= ~pins;
else
P0DR |= pins;
if(speedHi)
P0SR &= ~pins;
else
P0SR |= pins;
if(dIEnable)
P0IE |= pins;
else
P0IE &= ~pins;
if(sTEnable)
P0NCS &= ~pins;
else
P0NCS |= pins;
}
//End of STC32G_P0PinsInit(ui8 pins, STC32G_IOMODE mode, BOOL pullUpEnable, BOOL pullDownEnable,BOOL drvEn,BOOL speedHi,BOOL dIEnable, BOOL sTEnable)
//*********************************************************************************************************************************************/
void STC32G_P1PinsInit(ui8 pins, STC32G_IOMODE mode, BOOL pullUpEnable, BOOL pullDownEnable,BOOL drvEn,BOOL speedHi,BOOL dIEnable, BOOL sTEnable)
{
SysInit();
switch(mode)
{
case BI_IO:
P1M1 &= ~pins;
P1M0 &= ~pins;
break;
case PP_OUT:
P1M1 &= ~pins;
P1M0 |= pins;
break;
case HI_IN:
P1M1 |= pins;
P1M0 &= pins;
break;
case ODR_OUT:
P1M1 |= pins;
P1M0 |= pins;
break;
}
if(pullUpEnable)
P1PU |= pins;
else
P1PU &= ~pins;
if(pullDownEnable)
P1DR |= pins;
else
P1DR &= ~pins;
if(drvEn)
P1DR &= ~pins;
else
P1DR |= pins;
if(speedHi)
P1SR &= ~pins;
else
P1SR |= pins;
if(dIEnable)
P1IE |= pins;
else
P1IE &= ~pins;
if(sTEnable)
P1NCS &= ~pins;
else
P1NCS |= pins;
}
//End of STC32G_P1PinsInit(ui8 pins, STC32G_IOMODE mode, BOOL pullUpEnable, BOOL pullDownEnable,BOOL drvEn,BOOL speedHi,BOOL dIEnable, BOOL sTEnable)
//**********************************************************************************************************************************************/
void STC32G_P2PinsInit(ui8 pins, STC32G_IOMODE mode, BOOL pullUpEnable, BOOL pullDownEnable,BOOL drvEn,BOOL speedHi,BOOL dIEnable, BOOL sTEnable)
{
SysInit();
switch(mode)
{
case BI_IO:
P2M1 &= ~pins;
P2M0 &= ~pins;
break;
case PP_OUT:
P2M1 &= ~pins;
P2M0 |= pins;
break;
case HI_IN:
P2M1 |= pins;
P2M0 &= pins;
break;
case ODR_OUT:
P2M1 |= pins;
P2M0 |= pins;
break;
}
if(pullUpEnable)
P2PU |= pins;
else
P2PU &= ~pins;
if(pullDownEnable)
P2DR |= pins;
else
P2DR &= ~pins;
if(drvEn)
P2DR &= ~pins;
else
P2DR |= pins;
if(speedHi)
P2SR &= ~pins;
else
P2SR |= pins;
if(dIEnable)
P2IE |= pins;
else
P2IE &= ~pins;
if(sTEnable)
P2NCS &= ~pins;
else
P2NCS |= pins;
}
//End of STC32G_P2PinsInit(ui8 pins, STC32G_IOMODE mode, BOOL pullUpEnable, BOOL pullDownEnable,BOOL drvEn,BOOL speedHi,BOOL dIEnable, BOOL sTEnable)
//*********************************************************************************************************************************************/
void STC32G_P3PinsInit(ui8 pins, STC32G_IOMODE mode, BOOL pullUpEnable, BOOL pullDownEnable,BOOL drvEn,BOOL speedHi,BOOL dIEnable, BOOL sTEnable)
{
SysInit();
switch(mode)
{
case BI_IO:
P3M1 &= ~pins;
P3M0 &= ~pins;
break;
case PP_OUT:
P3M1 &= ~pins;
P3M0 |= pins;
break;
case HI_IN:
P3M1 |= pins;
P3M0 &= pins;
break;
case ODR_OUT:
P3M1 |= pins;
P3M0 |= pins;
break;
}
if(pullUpEnable)
P3PU |= pins;
else
P3PU &= ~pins;
if(pullDownEnable)
P3DR |= pins;
else
P3DR &= ~pins;
if(drvEn)
P3DR &= ~pins;
else
P3DR |= pins;
if(speedHi)
P3SR &= ~pins;
else
P3SR |= pins;
if(dIEnable)
P3IE |= pins;
else
P3IE &= ~pins;
if(sTEnable)
P3NCS &= ~pins;
else
P3NCS |= pins;
}
//End of STC32G_P3PinsInit(ui8 pins, STC32G_IOMODE mode, BOOL pullUpEnable, BOOL pullDownEnable,BOOL drvEn,BOOL speedHi,BOOL dIEnable, BOOL sTEnable)
//**********************************************************************************************************************************************/
void STC32G_P4PinsInit(ui8 pins, STC32G_IOMODE mode, BOOL pullUpEnable, BOOL pullDownEnable,BOOL drvEn,BOOL speedHi,BOOL dIEnable, BOOL sTEnable)
{
SysInit();
switch(mode)
{
case BI_IO:
P4M1 &= ~pins;
P4M0 &= ~pins;
break;
case PP_OUT:
P4M1 &= ~pins;
P4M0 |= pins;
break;
case HI_IN:
P4M1 |= pins;
P4M0 &= pins;
break;
case ODR_OUT:
P4M1 |= pins;
P4M0 |= pins;
break;
}
if(pullUpEnable)
P4PU |= pins;
else
P4PU &= ~pins;
if(pullDownEnable)
P4DR |= pins;
else
P4DR &= ~pins;
if(drvEn)
P4DR &= ~pins;
else
P4DR |= pins;
if(speedHi)
P4SR &= ~pins;
else
P4SR |= pins;
if(dIEnable)
P4IE |= pins;
else
P4IE &= ~pins;
if(sTEnable)
P4NCS &= ~pins;
else
P4NCS |= pins;
}
//End of STC32G_P4PinsInit(ui8 pins, STC32G_IOMODE mode, BOOL pullUpEnable, BOOL pullDownEnable,BOOL drvEn,BOOL speedHi,BOOL dIEnable, BOOL sTEnable)
//**********************************************************************************************************************************************/
void STC32G_P5PinsInit(ui8 pins, STC32G_IOMODE mode, BOOL pullUpEnable, BOOL pullDownEnable,BOOL drvEn,BOOL speedHi,BOOL dIEnable, BOOL sTEnable)
{
SysInit();
switch(mode)
{
case BI_IO:
P5M1 &= ~pins;
P5M0 &= ~pins;
break;
case PP_OUT:
P5M1 &= ~pins;
P5M0 |= pins;
break;
case HI_IN:
P5M1 |= pins;
P5M0 &= pins;
break;
case ODR_OUT:
P5M1 |= pins;
P5M0 |= pins;
break;
}
if(pullUpEnable)
P5PU |= pins;
else
P5PU &= ~pins;
if(pullDownEnable)
P5DR |= pins;
else
P5DR &= ~pins;
if(drvEn)
P5DR &= ~pins;
else
P5DR |= pins;
if(speedHi)
P5SR &= ~pins;
else
P5SR |= pins;
if(dIEnable)
P5IE |= pins;
else
P5IE &= ~pins;
if(sTEnable)
P5NCS &= ~pins;
else
P5NCS |= pins;
}
//End of STC32G_P5PinsInit(ui8 pins, STC32G_IOMODE mode, BOOL pullUpEnable, BOOL pullDownEnable,BOOL drvEn,BOOL speedHi,BOOL dIEnable, BOOL sTEnable)
//**********************************************************************************************************************************************/
void STC32G_P6PinsInit(ui8 pins, STC32G_IOMODE mode, BOOL pullUpEnable, BOOL pullDownEnable,BOOL drvEn,BOOL speedHi,BOOL dIEnable, BOOL sTEnable)
{
SysInit();
switch(mode)
{
case BI_IO:
P6M1 &= ~pins;
P6M0 &= ~pins;
break;
case PP_OUT:
P6M1 &= ~pins;
P6M0 |= pins;
break;
case HI_IN:
P6M1 |= pins;
P6M0 &= pins;
break;
case ODR_OUT:
P6M1 |= pins;
P6M0 |= pins;
break;
}
if(pullUpEnable)
P6PU |= pins;
else
P6PU &= ~pins;
if(pullDownEnable)
P6DR |= pins;
else
P6DR &= ~pins;
if(drvEn)
P6DR &= ~pins;
else
P6DR |= pins;
if(speedHi)
P6SR &= ~pins;
else
P6SR |= pins;
if(dIEnable)
P6IE |= pins;
else
P6IE &= ~pins;
if(sTEnable)
P6NCS &= ~pins;
else
P6NCS |= pins;
}
//End of STC32G_P6PinsInit(ui8 pins, STC32G_IOMODE mode, BOOL pullUpEnable, BOOL pullDownEnable,BOOL drvEn,BOOL speedHi,BOOL dIEnable, BOOL sTEnable)
//**********************************************************************************************************************************************/
void STC32G_P7PinsInit(ui8 pins, STC32G_IOMODE mode, BOOL pullUpEnable, BOOL pullDownEnable,BOOL drvEn,BOOL speedHi,BOOL dIEnable, BOOL sTEnable)
{
SysInit();
switch(mode)
{
case BI_IO:
P7M1 &= ~pins;
P7M0 &= ~pins;
break;
case PP_OUT:
P7M1 &= ~pins;
P7M0 |= pins;
break;
case HI_IN:
P7M1 |= pins;
P7M0 &= pins;
break;
case ODR_OUT:
P7M1 |= pins;
P7M0 |= pins;
break;
}
if(pullUpEnable)
P7PU |= pins;
else
P7PU &= ~pins;
if(pullDownEnable)
P7DR |= pins;
else
P7DR &= ~pins;
if(drvEn)
P7DR &= ~pins;
else
P7DR |= pins;
if(speedHi)
P7SR &= ~pins;
else
P7SR |= pins;
if(dIEnable)
P7IE |= pins;
else
P7IE &= ~pins;
if(sTEnable)
P7NCS &= ~pins;
else
P7NCS |= pins;
}
//End of STC32G_P7PinsInit(ui8 pins, STC32G_IOMODE mode, BOOL pullUpEnable, BOOL pullDownEnable,BOOL drvEn,BOOL speedHi,BOOL dIEnable, BOOL sTEnable)
/***************************************************************************************************************************************************/
void STC32G_PortsPinsInit(ui8 ports,ui8 pins, STC32G_IOMODE mode, BOOL pullUpEnable, BOOL pullDownEnable,BOOL drvEn,BOOL speedHi,BOOL dIEnable, BOOL sTEnable)
{
ui8 i;
for(i = 0; i < 8; i++)
{
if(ports & (1 << i))
{
switch(i)
{
case 0:
STC32G_P0PinsInit(pins, mode, pullUpEnable, pullDownEnable,drvEn,speedHi,dIEnable, sTEnable);
break;
case 1:
STC32G_P1PinsInit(pins, mode, pullUpEnable, pullDownEnable,drvEn,speedHi,dIEnable, sTEnable);
break;
case 2:
STC32G_P2PinsInit(pins, mode, pullUpEnable, pullDownEnable,drvEn,speedHi,dIEnable, sTEnable);
break;
case 3:
STC32G_P3PinsInit(pins, mode, pullUpEnable, pullDownEnable,drvEn,speedHi,dIEnable, sTEnable);
break;
case 4:
STC32G_P4PinsInit(pins, mode, pullUpEnable, pullDownEnable,drvEn,speedHi,dIEnable, sTEnable);
break;
case 5:
STC32G_P5PinsInit(pins, mode, pullUpEnable, pullDownEnable,drvEn,speedHi,dIEnable, sTEnable);
break;
case 6:
STC32G_P6PinsInit(pins, mode, pullUpEnable, pullDownEnable,drvEn,speedHi,dIEnable, sTEnable);
break;
case 7:
STC32G_P7PinsInit(pins, mode, pullUpEnable, pullDownEnable,drvEn,speedHi,dIEnable, sTEnable);
break;
}
}
}
}
//End of STC32G_PortsPinsInit(ui8 ports,ui8 pins, STC32G_IOMODE mode, BOOL pullUpEnable, BOOL pullDownEnable,BOOL drvEn,BOOL speedHi,BOOL dIEnable, BOOL sTEnable)I will also config.h Made modifications , The modified code is as follows ：
/*STC32G_GPIO.h
Designed by Bill Liu
Version 0.0
Modified last by Bill Liu on 06/23/2022
*/
#ifndef __CONFIG_H__
#define __CONFIG_H__
#define FOSC 35000000UL
//#define FOSC 24000000UL
//#define FOSC 27000000UL
//#define FOSC 30000000UL
//#define FOSC 33177600UL
//********************************************************
void SysInit(); //init System speed fastest
#endifconfig.c The source code is as follows ：
/*config.c
Designed by Bill Liu
Version 0.0
Modified last by Bill Liu on 06/22/2022
*/
#include <STC32G.h>
#include "config.h"
//********************************************************
void SysInit() //init System speed fastest
{
EAXFR = 1; //visit XFR enable
CKCON = 0x00; //set outer data bus speed fastest
WTST = 0x00; //CPU wait 0 to run program
}
//End of SysInit()5. I/O Configure the instance Next, I will use the library function written by myself to demonstrate the verification I/O To configure . I will use the following board to verify
The board is separated by white lines and divided into three areas , On the left is the power area , In the middle are analog sampling and MCU Area , On the right is the logic input and output area . Take another look at the model of single chip microcomputer ：
First compile the following empty program , Download it to the MCU , See if you can succeed .
/*main.c
Designed by Bill Liu
Version 0.0
Modified last by Bill Liu on 06/22/2022
*/
#include "main.h"
#include "config.h"
void main()
{
}
//End of main()Download successful , as follows ：
Take a test I/O Output voltage of port , Choose one at will I/O Mouth test （ The actual test is P73）, The test results are as follows .
Depending on the output low level , It should output neither high level nor low level （ No current flows , No current flows out ), See if it can drive Led, The following is one that can be lit normally LED：
First, keep the power terminal unchanged , Put it on the other end Connect with P73 On the connecting pin , see LED Whether it is lit , give the result as follows ：
LED Not lit It indicates that there is no current input .SCT32G Power on reset I/O The port is in the high resistance input state , On the one hand, it can enhance the anti-interference ability , On the other hand, it can avoid the misoperation of the circuit controlled by the single chip microcomputer when it is powered on and reset .
stay main() Insert the following code into the function ：
void main()
{
STC32G_P7PinsInit(PIN3, BI_IO, 0, 0, 0, 0, 0, 0);
P73 = 0;
while(1);
}
//End of main()Compile and download , If the library function is ok ,LED It should light , give the result as follows ：
It indicates that there is no error in the library function . take main() The code in the function is modified as follows ：
void main()
{
STC32G_P7PinsInit(PIN3, BI_IO, 0, 0, 0, 0, 0, 0);
P73 = 1;
while(1);
}
//End of main()Compile and download to MCU , Let's test the two-way I/O Weak pull-up positive driving ability . give the result as follows ：
LED Only a faint light , explain I/O Weak forward driving ability . Now pull up the resistor to enable , That is, the third parameter of the library function is set to 1, modify main() The code in the function is as follows ：
void main()
{
STC32G_P7PinsInit(PIN3, BI_IO, 1, 0, 0, 0, 0, 0);
P73 = 1;
while(1);
}
//End of main()The results after compiling and downloading are as follows ：
LED Brighten , It shows that the forward driving ability has been enhanced . Now increase the driving current , Set the variables in the red box below to 1, Look at the results and changes ：
void main()
{
STC32G_P7PinsInit(PIN3, BI_IO, 0, 0, 1, 0, 0, 0);
P73 = 1;
while(1);
}
//End of main()Compile and download , give the result as follows ：
Feeling and two-way I/O The forward driving ability of weak pull-up is similar . Look again. , When the pull-down resistor is turned on, it is bidirectional I/O Weak pull-up positive driving ability . modify main() The function code is as follows ：
void main()
{
STC32G_P7PinsInit(PIN3, BI_IO, 0, 1, 0, 0, 0, 0);
P73 = 1;
while(1);
}
//End of main()The results of compiling and downloading to the MCU are as follows ：
Feeling LED The brightness change is not obvious .
STC32G Of I/O a STC15 Of I/O New functions and registers added , As can be seen from the above test ,I/O It has strong negative driving ability （ It can withstand large perfusion current ）, Weak forward driving ability , If you want to make I/O The mouth has a large positive driving ability , It needs to be set to push-pull mode , If it is set to bidirectional I/O, It is necessary to pull up the resistor to improve its forward driving ability , Can make PxDR Provide two-way I/O The forward driving ability of is not obvious , Maybe it's just for improving I/O The level conversion speed of is useful .
Let's test it again I/O Read and write , take main() The code of the function is modified as follows ：
void main()
{
STC32G_P7PinsInit(PIN3, BI_IO, 1, 0, 1, 0, 1, 0);
P73 = 1;
STC32G_P0PinsInit(0xFF, BI_IO, 0, 0, 0, 0, 1, 1); //init to bidirectional I/O, pull up disable, pull down disable , dive ability enhance disable,
//high speed disable, digital singal input enable, schmitt trigger enable
STC32G_P2PinsInit(0xFF, BI_IO, 0, 0, 0, 0, 1, 1);
P0 = 0xA0;
P2 = 0xFF;
while(1)
{
if(P2==P0)
P73 = 1;
else
P73 = 0;
}
}
//End of main()The results after compiling and downloading are as follows ：
LED by P73 Forward drive ,LED bright , explain P2、P0 Read data normally . Now will main() The code of the function is modified as follows ：
void main()
{
STC32G_P7PinsInit(PIN3, BI_IO, 1, 0, 1, 0, 1, 0);
P73 = 1;
STC32G_P0PinsInit(0xFF, BI_IO, 0, 0, 0, 0, 1, 1); //init to bidirectional I/O, pull up disable, pull down disable , dive ability enhance disable,
//high speed disable, digital singal input enable, schmitt trigger enable
STC32G_P2PinsInit(0xFF, BI_IO, 0, 0, 0, 0, 1, 0);
P0 = 0xA0;
P2 = 0xFF;
while(1)
{
if(P2==P0)
P73 = 1;
else
P73 = 0;
}
}
//End of main()The compilation and download results are as follows ：
Explain that even if Schmidt trigger is not enabled , Data can still be read .
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