Transcript 4.NuMicro_GPIO.ppt

General Purpose Input/Output
Department of Electrical Engineering,
National Taiwan Ocean University
3/21/2013
Richard Kuo
Assistant Professor
www.ee.ntou.edu.tw
Outline
Department of Electrical Engineering,
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Cortex-M0 MCU General Purpose Input/Output
4.NuMicro_GPIO.PPT
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Exercise : GPIO to scan 3x3 keypad (Smpl_7seg_Keypad)
Exercise : GPIO controlled by 3x3 keypad (Smple_GPIO_Keypad)
Exercise : GPIO to read Body Infrared Sensor
(Smpl_GPIO_BodyInfrared)
Exercise : GPIO connecting to LCM16x2 (Smpl_GPIO_LCM16x2)
Exercise : GPIO interface to 16x16 LED Matrix
(Smpl_GPIO_LED16x16)
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Nu-LB-NUC140 Learning Board
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7 segment LEDs
RGB LED GPA12,13,14
LEDs GPC12,13,14,15
Buzzer
GPB11
3x3Keypad
3x3 Keypad schematic
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Control Pins used for 3x3 Keypad
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Column control : GPA2, 1, 0
Raw control : GPA 3, 4, 5
► Key1 = GPA3 & GPA2
► Key2 = GPA3 & GPA1
► Key3 = GPA3 & GPA0
► Key4 = GPA4 & GPA2
► Key5 = GPA4 & GPA1
► Key6 = GPA4 & GPA0
► Key7 = GPA5 & GPA2
► Key8 = GPA5 & GPA1
► Key9 = GPA5 & GPA0
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Smpl_7seg_Keypad
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Display Number = 5
Press middle key
Keypad Driver – Scankey.c
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#include <stdio.h>
#include "Driver\DrvGPIO.h"
#include "ScanKey.h"
void delay(void)
{
int j;
for(j=0;j<1000;j++);
}
void OpenKeyPad(void)
{
uint8_t i;
/* Initial key pad */
for(i=0;i<6;i++)
DrvGPIO_Open(E_GPA, i, E_IO_QUASI);
}
void CloseKeyPad(void)
{
uint8_t i;
for(i=0;i<6;i++)
DrvGPIO_Close(E_GPA, i);
}
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Keypad Driver – Scankey.c
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uint8_t Scankey(void)
{
uint8_t act[4]={0x3b, 0x3d, 0x3e};
uint8_t i,temp,pin;
for(i=0;i<3;i++)
{
temp=act[i];
for(pin=0;pin<6;pin++)
{
if((temp&0x01)==0x01)
DrvGPIO_SetBit(E_GPA,pin);
else
DrvGPIO_ClrBit(E_GPA,pin);
temp>>=1;
}
delay();
if(DrvGPIO_GetBit(E_GPA,3)==0)
return(i+1);
if(DrvGPIO_GetBit(E_GPA,4)==0)
return(i+4);
if(DrvGPIO_GetBit(E_GPA,5)==0)
return(i+7);
}
return 0;
}
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Smpl_7seg_Keypad
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int32_t main (void)
{
int8_t number;
UNLOCKREG();
DrvSYS_Open(48000000);
LOCKREG();
OpenKeyPad();
while(1)
{
number = Scankey();
// scan keypad to get a number (1~9)
show_seven_segment(0,number); // display number on 7-segment LEDs
DrvSYS_Delay(5000);
// delay time for keeping 7-segment display
close_seven_segment();
// turn off 7-segment LEDs
}
}
Smpl_GPIO_Keypad
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Press key
Control GPIO outputs
GPIOs control 4-port Relay
Smpl_GPIO_Keypad
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Press key1
Press key2
Press key3
Press key4
Relay #1 off
Relay #2 off
Relay #3 off
Relay #4 off
Vcc = 3.3V, GPIO output hi (base)  Relay Control pin = low (collector)
Smpl_GPIO_Keypad
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int32_t main (void)
{
char TEXT1[16] = "number:
int8_t i, number;
";
UNLOCKREG();
SYSCLK->PWRCON.XTL12M_EN = 1;
SYSCLK->CLKSEL0.HCLK_S = 0;
LOCKREG();
Initial_panel();
clr_all_panel();
for (i=0; i<9; i++) {
DrvGPIO_Open(E_GPB, i, E_IO_OUTPUT);
DrvGPIO_ClrBit(E_GPB, i);
}
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OpenKeyPad();
print_lcd(0,"Smpl_GPIO_Keypad");
while(1)
{
number = Scankey();
sprintf(TEXT1+8,"%d", number);
print_lcd(1,TEXT1);
if (number!=0) DrvGPIO_SetBit(E_GPB,
number-1);
else
for (i=0; i<9; i++) DrvGPIO_ClrBit(E_GPB, i);
}
}
Smpl_GPIO_BodyInfrared
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Display Detected !
Human Body Infrared Detector
Smpl_GPIO_BodyInfrared
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int main(void)
{
UNLOCKREG();
SYSCLK->PWRCON.XTL12M_EN = 1; //Enable 12Mhz crystal and set HCLK=12Mhz
SYSCLK->CLKSEL0.HCLK_S = 0;
LOCKREG();
DrvGPIO_Open(E_GPA, 0, E_IO_INPUT); // set GPA0 to input mode
Initial_panel();
clr_all_panel();
print_lcd(0, "Body Infrared ");
print_lcd(1, "GPA0 input......");
while(1) {
if (DrvGPIO_GetBit(E_GPA,0)==0) print_lcd(2, "Object Detected!");
else
print_lcd(2, "No Detection! ");
}
}
LCD MODULE - PC1602
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Operating at 5V
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LCM16x2 Pin Description
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// LCD 16x2 Module
// pin1 Gnd
// pin2 Vcc:
// pin3 Vo : brightness control
// pin4 RS : 1=Data, 0=Instruction
// pin5 RW : 1=Read, 0=Write
// pin6 E : Chip Enable
// pin7~14 : D0~D7
// pin15 A : backlight+
// pin16 K : backlight-
(to Gnd)
(to +5V)
(to Gnd)
(to GPA0)
(to GPA1)
(to GPA2)
(to GPE0~7)
(to Vcc) no backlight, no coonection
(to Gnd) no backlight, no connection
// DB[7:0] : Description
// 0000_0001: Clear Display
// 0000_001x: Return to Home (Display RAM address=0)
// 0000_01DS: Cursor move direction, Display Shift
// 0000_1DCB: Display/Cursor/Blinking on/off
// 0001_SRxx: Curosor move, shift R/L
// 01xx_xxxx: set CGRAM
// 1xxx_xxxx: set DDRAM
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Smpl_GPIO_LCM16x2
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void LCD_data(unsigned char wdata)
{
LCD_DATA=wdata;
LCD_RS_SET;
LCD_RW_CLR;
LCD_E_CLR;
DrvSYS_Delay(100);
LCD_E_SET;
}
void LCD_cmd(unsigned char wdata)
{
LCD_DATA=wdata;
LCD_RS_CLR;
LCD_RW_CLR;
LCD_E_CLR;
DrvSYS_Delay(100);
LCD_E_SET;
}
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Smpl_GPIO_LCM16x2
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void Init_LCM16x2(void)
{
LCD_DATA=0;
DrvSYS_Delay(40000);
LCD_cmd(0x38);
DrvSYS_Delay(1000);
LCD_cmd(0x38);
DrvSYS_Delay(37);
LCD_cmd(0x06);
DrvSYS_Delay(37);
LCD_cmd(0x0C);
DrvSYS_Delay(37);
LCD_cmd(0x01);
DrvSYS_Delay(1520);
}
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// wait time >40ms after Vcc>4.5V
// 8-bit Interface
// Cursor Move to right, no shift
// Display ON, Cursor Off, Blinking off
// Display Clear
Smpl_GPIO_LCM16x2
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void display_xy(uint8_t x,uint8_t y)
{
if(y==1) x+=0x40;
x+=0x80;
LCD_cmd(x);
}
void display_char(uint8_t x, uint8_t y,
unsigned char dat)
{
display_xy(x,y);
LCD_data(dat);
}
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void display_string(uint8_t x,uint8_t y,unsigned
char *s)
{
uint8_t i;
display_xy(x,y);
i=0;
while((x+i)<16)
{
LCD_data(*s);
s++;
i++;
}
}
Smpl_GPIO_LCM16x2
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main()
{
unsigned char LcdBuf1[16]= "Welcome to NTOU ";
unsigned char LcdBuf2[16]= "Cortex-M0 MCU !!";
Init_LCM16x2();
display_string(0,0,LcdBuf1); // display line 1
display_string(0,1,LcdBuf2); // display line 2
}
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Smpl_GPIO_LCM8x2
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Smpl_GPIO_LCM8x2
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//
// NuMicro Nu-LB-NUC140
// Sample Code : Smpl_GPIO_LCM8x2
//
// LCD 8x2 Module
// pin1 Vss:
// pin2 Vcc: to +5V
// pin3 Vee : brightness control
// pin4 RS : 1=Data, 0=Instruction
// pin5 RW : 1=Read, 0=Write
// pin6 E : Chip Enable
// pin7~14 : D0~D7
(to Gnd)
(to +5V)
(to Gnd)
(to GPA0)
(to GPA1)
(to GPA2)
(to GPB0~7)
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Smpl_GPIO_LCM8x2
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#include <stdio.h>
#include "NUC1xx.h"
#include "Driver\DrvGPIO.h"
#include "Driver\DrvUART.h"
#include "Driver\DrvSYS.h"
#define LCD_DATA GPIOB->DOUT
// D0~7 pin = GPB0~7
#define LCD_RS_HI DrvGPIO_SetBit(E_GPA,0)
// RS pin = GPA0
#define LCD_RS_LO DrvGPIO_ClrBit(E_GPA,0)
#define LCD_RW_HI DrvGPIO_SetBit(E_GPA,1) // RW pin = GPA1
#define LCD_RW_LO DrvGPIO_ClrBit(E_GPA,1)
#define LCD_E_HI DrvGPIO_SetBit(E_GPA,2)
// E pin = GPA2
#define LCD_E_LO DrvGPIO_ClrBit(E_GPA,2)
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Smpl_GPIO_LCM8x2
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void Init_GPIO(void)
{
DrvGPIO_Open(E_GPA, 0, E_IO_OUTPUT);
DrvGPIO_Open(E_GPA, 1, E_IO_OUTPUT);
DrvGPIO_Open(E_GPA, 2, E_IO_OUTPUT);
DrvGPIO_ClrBit(E_GPA, 0);
DrvGPIO_ClrBit(E_GPA, 1);
DrvGPIO_ClrBit(E_GPA, 2);
}
void LCD_data(unsigned char wdata)
{
LCD_DATA=wdata;
LCD_RS_HI;
LCD_RW_LO;
LCD_E_HI;
DrvSYS_Delay(1000);
LCD_E_LO;
}
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void LCD_cmd(unsigned char wdata)
{
LCD_DATA=wdata;
LCD_RS_LO;
LCD_RW_LO;
LCD_E_HI;
DrvSYS_Delay(1000);
LCD_E_LO;
}
Smpl_GPIO_LCM8x2
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void Init_LCM8x2(void)
{
LCD_DATA=0;
DrvSYS_Delay(37);// wait time >40ms after Vcc>4.5V
LCD_cmd(0x38);
DrvSYS_Delay(37);
LCD_cmd(0x38);
DrvSYS_Delay(37);
LCD_cmd(0x38);
DrvSYS_Delay(37);
LCD_cmd(0x0C);
DrvSYS_Delay(37);
LCD_cmd(0x01);
DrvSYS_Delay(1520);
LCD_cmd(0x06);
DrvSYS_Delay(37);
}
void display_xy(uint8_t x,uint8_t y)
{
if(y==1) x+=0x40;
x+=0x80;
LCD_cmd(x);
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void display_char(uint8_t x, uint8_t y, unsigned char dat)
{
display_xy(x,y);
LCD_data(dat);
}
void display_string(uint8_t x,uint8_t y,unsigned char *s)
{
uint8_t i;
display_xy(x,y);
i=0;
while((x+i)<8)
{
LCD_data(*s);
s++;
i++;
}
}
Smpl_GPIO_LCM8x2
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main()
{
unsigned char LcdBuf1[8]= "Nuvoton ";
unsigned char LcdBuf2[8]= "CortexM0";
UNLOCKREG();
DrvSYS_SetOscCtrl(E_SYS_XTL12M, 1); // Enable the 12MHz oscillator oscillation
DrvSYS_SelectHCLKSource(0); // HCLK clock source. 0: external 12MHz; 4:internal
22MHz RC oscillator
LOCKREG();
Init_GPIO();
Init_LCM8x2();
display_string(0,0,LcdBuf1);//顯示第一行，第一列第0位置開始
display_string(0,1,LcdBuf2);//顯示第二行，第二列第0位置開始
}
16x16 LED Matrix
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►
Interface Signals:
–
–
–
–
–
–
VCC
GND
P24
P23
P22
P21
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16x16 LED Matrix schematic
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Sample Code : Smpl_GPIO_LED16x16
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Smpl_GPIO_LED16x16
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// LED Matrix 16x16
// pin description & connection
// P24 : CLK to GPA4
// P23 : AB to GPA3
// P22 : RCK to GPA2
// P21 : SRCK to GPA1
// P20 : SER to GPA0
#include <stdio.h>
#include "NUC1xx.h"
#include "Driver\DrvSYS.h"
#include "Driver\DrvGPIO.h"
#define
#define
#define
#define
#define
#define
GPIO_port E_GPA
LED16x16_CLK 4 // 74HC164 clock
LED16x16_AB 3 // 74HC164 AB
LED16x16_RCK 2 // 74HC595 register clock
LED16x16_SRCK 1 // 74HC595 shift register clock
LED16x16_SER 0 // 74HC595 serial in
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Smpl_GPIO_LED16x16
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void InitLED16x16(void)
{
DrvGPIO_InitFunction(E_FUNC_GPIO);
DrvGPIO_Open(GPIO_port, LED16x16_CLK, E_IO_OUTPUT);
DrvGPIO_Open(GPIO_port, LED16x16_AB, E_IO_OUTPUT);
DrvGPIO_Open(GPIO_port, LED16x16_RCK, E_IO_OUTPUT);
DrvGPIO_Open(GPIO_port, LED16x16_SRCK, E_IO_OUTPUT);
DrvGPIO_Open(GPIO_port, LED16x16_SER, E_IO_OUTPUT);
// set to default
DrvGPIO_ClrBit(GPIO_port, LED16x16_CLK);
DrvGPIO_ClrBit(GPIO_port, LED16x16_AB);
DrvGPIO_ClrBit(GPIO_port, LED16x16_RCK);
DrvGPIO_ClrBit(GPIO_port, LED16x16_SRCK);
DrvGPIO_ClrBit(GPIO_port, LED16x16_SER);
}
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Smpl_GPIO_LED16x16
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void CLK(uint8_t level) {
if (level==0) DrvGPIO_ClrBit(GPIO_port, LED16x16_CLK);
else
DrvGPIO_SetBit(GPIO_port, LED16x16_CLK); }
void AB(uint8_t level) {
if (level==0) DrvGPIO_ClrBit(GPIO_port, LED16x16_AB);
else
DrvGPIO_SetBit(GPIO_port, LED16x16_AB); }
void RCK(uint8_t level) {
if (level==0) DrvGPIO_ClrBit(GPIO_port, LED16x16_RCK);
else
DrvGPIO_SetBit(GPIO_port, LED16x16_RCK); }
void SRCK(uint8_t level) {
if (level==0) DrvGPIO_ClrBit(GPIO_port, LED16x16_SRCK);
else
DrvGPIO_SetBit(GPIO_port, LED16x16_SRCK); }
void SER(uint8_t level) {
if (level==0) DrvGPIO_ClrBit(GPIO_port, LED16x16_SER);
else
DrvGPIO_SetBit(GPIO_port, LED16x16_SER); }
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Smpl_GPIO_LED16x16
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void display() {
uint8_t i,ia,j,tmp;
AB(0);
for(i=0;i<16;i++) {
CLK(0);
RCK(0);
SRCK(0);
for(ia=2; ia>0; ia--) {
tmp = ~ data[(i*2)+ia-1];
for(j=0; j<8; j++) {
SRCK(0);
SER(( (tmp>>j) & 0x01));
SRCK(1); }
}
RCK(1);
CLK(1);
AB(1);
}
SRCK(0);
RCK(0);
CLK(0);
}
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// even-byte will shift to Right, odd-byte at Left
Smpl_GPIO_LED16x16
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int32_t main (void)
{
uint8_t k;
UNLOCKREG();
DrvSYS_SetOscCtrl(E_SYS_XTL12M, 1); //Enable the 12MHz oscillator oscillation
DrvSYS_Delay(5000); //Waiting for 12M Xtal stable
DrvSYS_SelectHCLKSource(0); // HCLK clock source. 0: external 12MHz; 4:internal 22MHz RC oscillator
LOCKREG();
DrvSYS_SetClockDivider(E_SYS_HCLK_DIV, 0);
InitLED16x16();
while(1)
{
for(k=0;k<32;k++) data[k]=greenman1[k];
display();
Delay(50000);
}
}
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