notes:code8051
Table of Contents
8051 Codes
Example codes (in C) for the classical Intel-8051 (mcu51) microcontroller core. Using my1code51 library. Tested using sdcc open source compiler and stc12 device.
Codes for NMK322
Testing IR module and HC-SR04 ultrasonic sensor module.
- test0.c
/*----------------------------------------------------------------------------*/ #include "uart.h" #include "timer.h" #define FPSIZE 2 #include "utils_float.h" #define _LCD_4BIT_INTERFACE_ /** DB4-DB7 => P0 (UPPER NIBBLE) */ /** E => P0.2 : NEEDS -ve EDGE */ /** R/W => P0.1 : 0=WR 1=RD */ /** RS => P0.0 : 0=CMD 1=DAT */ #include "textlcd.h" /*----------------------------------------------------------------------------*/ /** * Testing IR module and HC-SR04 ultrasonic sensor module * - display on both uart and lcd **/ /*----------------------------------------------------------------------------*/ MY1SBIT(IRMOD,PIN10); MY1SBIT(TRIG,PIN16); MY1SBIT(ECHO,PIN17); /*----------------------------------------------------------------------------*/ MY1SBIT(TEST_IR,PIN14); MY1SBIT(TEST_HC,PIN15); /*----------------------------------------------------------------------------*/ #define FLAG_IR 0x01 #define FLAG_HC 0x02 /*----------------------------------------------------------------------------*/ void main(void) { unsigned char wait; unsigned int tval,loop, flag; float fval, dist; char buff[16]; uart_init(); uart_puts("\r\nTESTING NMK322 STUFFS\r\n"); lcd_init(); lcd_goto_line1(); lcd_puts("TESTKIT 4 NMK322"); timer_init(); flag = 0; while (1) { if (TEST_IR==0) { if ((flag&FLAG_IR)==0) { lcd_goto_line1(); lcd_puts("TEST 4 IR MODULE"); uart_puts("\r\nTESTING IR MODULE\r\n"); flag = FLAG_IR; } lcd_goto_line2(); lcd_puts(" "); lcd_goto_line2(); lcd_puts("Waiting... "); uart_puts("\r\nWaiting... "); while (IRMOD); // outputs logic low when obstacle detected lcd_puts("|*"); uart_puts("|*"); while (!IRMOD); lcd_puts("|"); uart_puts("|\r\n"); for (loop=65000;loop;loop--); } if (TEST_HC==0) { if ((flag&FLAG_HC)==0) { lcd_goto_line1(); lcd_puts("TEST HC-SR04 MOD"); uart_puts("\r\nTESTING HC-SR04 MODULE\r\n"); flag = FLAG_HC; } lcd_goto_line2(); lcd_puts(" "); lcd_goto_line2(); timer_prep(0); TRIG = 1; for (wait=10;wait;wait--); // arounf 10us? TRIG = 0; while (!ECHO); timer_exec(); while (ECHO); timer_stop(); tval = ((unsigned int)TH0<<8)|TL0; fval = (float)tval * 1.085; // in us dist = fval / 58.0; // in cm lcd_puts("Dist:"); uart_puts("-- Distance="); float2str(buff,dist); lcd_puts(buff); lcd_puts("cm"); uart_puts(buff); uart_puts(" cm\r\n"); for (loop=65000;loop;loop--); } } } /*----------------------------------------------------------------------------*/
Testing HC06 bluetooth module , TowerPro MG996R servo & Text LCD.
- nmk322_test1.c
/*----------------------------------------------------------------------------*/ /** * Testing HC06 bluetooth module , TowerPro MG996R servo & Text LCD * - note: servo pin (1|orange:PWM)(2|red:vcc)(3|brown:ground) **/ /*----------------------------------------------------------------------------*/ #define BTNAME "nmk322bt" #define BTPASS "0000" #include "hc06.h" #include "uart.h" #include "timer.h" #include "utils.h" /*----------------------------------------------------------------------------*/ /** interface as defined in nmk322 lab module */ #define _LCD_8BIT_INTERFACE_ #define _LCD_PINS_DEFINED_ MY1SFR(LCD_DATA,0xA0); MY1SBIT(LCD_BUSY,0xA7); MY1SBIT(LCD_DNC,0x87); MY1SBIT(LCD_RNW,0x86); MY1SBIT(LCD_ENB,0x85); /*----------------------------------------------------------------------------*/ #include "textlcd.h" /*----------------------------------------------------------------------------*/ #define SERVO_PIN P1_0 #include "servo.h" /*----------------------------------------------------------------------------*/ MY1SBIT(GO000,PIN15); MY1SBIT(GO1MS,PIN16); MY1SBIT(GO2MS,PIN17); /*----------------------------------------------------------------------------*/ #define BUFFSIZE 128 /*----------------------------------------------------------------------------*/ __xdata char buff[BUFFSIZE]; /*----------------------------------------------------------------------------*/ void main(void) { unsigned char curr, test; GO000 = 1; GO1MS = 1; GO2MS = 1; timer_init(); servo_init(); lcd_init(); lcd_goto_line1(); lcd_puts("NMK322 SV/LCD/BT"); uart_init(); uart_puts("NMK322 SV/LCD/BT\r\n\r\n"); hc06_init(); curr = 3; do { uart_puts("-- Sending AT... "); hc06_find(); if (hc06_wait_ok()==HC06_OK) { uart_puts("OK.\r\n"); uart_puts("\r\nSet default name & pin\r\n"); uart_puts("-- Set Name ("); uart_puts(BTNAME); uart_puts("): "); hc06_setname(buff,BUFFSIZE); uart_puts(buff); uart_puts("\r\n"); timer_delay1s(test,1); /* set pass */ uart_puts("-- Set Pin ("); uart_puts(BTPASS); uart_puts("): "); hc06_setpin(buff,BUFFSIZE); uart_puts(buff); uart_puts("\r\n"); timer_delay1s(test,1); break; } uart_puts("timeout.\n"); timer_delay1s(test,1); } while (--curr); while (1) { if (hc06_peek()) { if (hc06_wait(buff,BUFFSIZE)>1) { if (buff[0]=='#') { curr = (unsigned char) str2uint(&buff[1]); if (curr>=5&&curr<=25) { uart_puts("## Turning to ("); uart_puts(&buff[1]); uart_puts(")\r\n"); servo_turn(curr); } else { uart_puts("** Invalid angle ("); uart_puts(&buff[1]); uart_puts(")\r\n"); } } else { uart_puts(">> "); uart_puts(buff); uart_puts("\r\n"); } } } if (GO000==0) { lcd_goto_line2(); lcd_puts("ServoTurn CENTER"); servo_turn(15); while (!GO000); lcd_goto_line2(); lcd_puts(" "); } if (GO1MS==0) { lcd_goto_line2(); lcd_puts("ServoTurn PWM1ms"); servo_turn(10); // 1ms pwm while (!GO1MS); lcd_goto_line2(); lcd_puts(" "); } if (GO2MS==0) { lcd_goto_line2(); lcd_puts("ServoTurn PWM2ms"); servo_turn(20); // 2ms pwm while (!GO2MS); lcd_goto_line2(); lcd_puts(" "); } } } /*----------------------------------------------------------------------------*/
Code: relay
- relay.c
/*----------------------------------------------------------------------------*/ #include "timer.h" #include "uart.h" /*----------------------------------------------------------------------------*/ MY1SBIT(DRIVE,PIN20); MY1SBIT(INPUT,PIN10); /*----------------------------------------------------------------------------*/ void main(void) { unsigned char wait; timer_init(); uart_init(); uart_puts("\nTESTING RELAY\n"); DRIVE = 1; /* active low */ INPUT = 1; while(1) { if (INPUT==0) { uart_puts("-- Switch ON... "); DRIVE = 0; wait = 3*TIMER_LOOP_1S; do { timer_wait(TIMER_VAL50MS); } while (--wait); uart_puts("OFF.\n"); DRIVE = 1; while (!INPUT); } } } /*----------------------------------------------------------------------------*/
Code: gtuc51
Test code for the old GTUC51B001 development board.
- gtuc51.c
/*----------------------------------------------------------------------------*/ /** * Demo program for gtuc51 (with io board) **/ /*----------------------------------------------------------------------------*/ #include "adc0831.h" #include "keypad_922.h" #include "textlcd.h" #include "utils_float.h" /*----------------------------------------------------------------------------*/ /** * Switch & LED Interface for gtuc51 i/o board * - multiplexed (dual/purpose) * - require jumper link settings! **/ /** SW0, SW1 => P3.3, P3.2 - LAYOUT ERROR */ __sbit __at (0xB3) SW0; __sbit __at (0xB2) SW1; /** LED{0-3} => P3.4-P3.7 */ __sbit __at (0xB4) LED0; __sbit __at (0xB5) LED1; __sbit __at (0xB6) LED2; __sbit __at (0xB7) LED3; /** LED{RX,TX} => P3.1, P3.0 - LAYOUT ERROR */ __sbit __at (0xB1) LEDRX; __sbit __at (0xB0) LEDTX; /** alias LEDX=-2 and LEDY=-1 (LEFT OF LED0) **/ __sbit __at (0xB1) LEDX; __sbit __at (0xB0) LEDY; /*----------------------------------------------------------------------------*/ char display[LCD_MAX_CHAR]; unsigned char lcdi, loop; float value; keybyte_t keyin; adcbyte_t check; __bit adc, adcgo, left, demo; /*----------------------------------------------------------------------------*/ #define DEMO_IO 1 #define DEMO_ADC 0 /*----------------------------------------------------------------------------*/ #define LOOP_COUNT 20 /*----------------------------------------------------------------------------*/ /* interrupt service routine for timer0 */ void timer_blink(void) __interrupt TF0_VECTOR { TR0 = 0; loop--; P1 = ~P1; if (loop==0) { if (!left) { loop = LED0; LED0 = LED1; LED1 = LED2; LED2 = LED3; LED3 = LEDX; LEDX = LEDY; LEDY = loop; } else { loop = LED3; LED3 = LED2; LED2 = LED1; LED1 = LED0; LED0 = LEDY; LEDY = LEDX; LEDX = loop; } loop = LOOP_COUNT; } TH0 = 0x4B; TL0 = 0xFD; TR0 = 1; /** 50ms */ } /*----------------------------------------------------------------------------*/ /* interrupt service routine for timer1 */ void timer_goadc(void) __interrupt TF1_VECTOR { TR1 = 0; TH1 = 0x4B; TL1 = 0xFD; if (loop>0) { TR1 = 1; /** 50ms */ loop--; } else { loop = LOOP_COUNT; adcgo = adc; } } /*----------------------------------------------------------------------------*/ /* interrupt service routine for int1 */ void check_switch0(void) __interrupt IE1_VECTOR { left = 0; if (lcdi<LCD_MAX_CHAR) { lcd_data(0x30); lcdi++; } } /*----------------------------------------------------------------------------*/ /* interrupt service routine for int0 */ void check_switch1(void) __interrupt IE0_VECTOR { left = 1; if (lcdi<LCD_MAX_CHAR) { lcd_data(0x31); lcdi++; } } /*----------------------------------------------------------------------------*/ /* main function */ void main(void) { /** initalize stuffs */ demo = DEMO_IO; /* default... just in case */ TMOD = 0x11; P1 = 0xFF; P3 = 0xFF; lcd_init(); lcd_goto_line1(); lcd_puts("8051 Select Demo"); lcd_goto_line2(); lcd_puts("[SW0]IO [SW1]ADC"); /* wait for user key press */ while (1) { if (!SW0) { demo = DEMO_IO; /* demo switch, led, keypad and P1 */ while(!SW0); /** wait until the user press & let go */ break; } else if (!SW1) { demo = DEMO_ADC; /* demo adc */ while(!SW1); break; } } /* select! */ if (demo==DEMO_IO) { lcd_goto_line1(); lcd_puts("MY18051 I/O DEMO"); lcd_goto_line2(); lcd_puts(" "); lcd_goto_line2(); /** set timer 0 overflow every 50ms - with interrupt handler */ loop = LOOP_COUNT; lcdi = 0; left = 0; P1 = 0xAA; LED0 = 0; IT0 = 1; IT1 = 1; EA = 1; ET0 = 1; EX0 = 1; EX1 = 1; TH0 = 0x4B; TL0 = 0xFD; TR0 = 1; /** main loop */ while (1) { keyin = key_wait_922(); if (keyin<10&&lcdi<LCD_MAX_CHAR) { /** numeric key! */ lcd_data(keyin+0x30); lcdi++; } else if(keyin==0x0F) { /** '#' key! */ lcd_goto_line2(); lcd_puts("HASHED! "); lcd_goto_line2(); lcdi = LCD_MAX_CHAR; } else if(keyin==0x0E) { /** '*' key! */ lcd_goto_line2(); lcd_puts(" "); lcd_goto_line2(); lcdi = 0; } } } else { lcd_goto_line1(); lcd_puts("MY18051 ADC DEMO"); lcd_goto_line2(); lcd_puts("SW0:ADC, SW1:CLR"); /* initialize adc */ adc_init(); adc = 0; adcgo = 0; EA = 1; /** adc status indicator */ LEDRX = adc; LEDTX = !adc; /** main loop */ while (1) { if (!SW0) { while (!SW0); /** wait until the user lets go */ adc = !adc; adcgo = adc; if (!adcgo) { ET1 = 0; TR1 = 0; lcd_puts("*"); } LEDRX = adc; LEDTX = !adc; } else if(!SW1) { while (!SW1); /** wait until the user lets go */ lcd_goto_line2(); lcd_puts("SW0:ADC, SW1:CLR"); } if (adcgo) { adcgo = 0; lcd_goto_line2(); lcd_puts(" "); /** read adc */ check = adc_get_data(); value = ((float) check / 255.0) * VREF; lcd_goto_line2(); lcd_puts("ADC: "); float2str(display,value); lcd_puts(display); lcd_puts(" ("); int2str(display,check); lcd_puts(display); lcd_puts(")"); /** set timer 1 overflow every 50ms - with interrupt handler */ ET1 = 1; TH1 = 0x4B; TL1 = 0xFD; TR1 = 1; } } } } /*----------------------------------------------------------------------------*/
notes/code8051.txt · Last modified: 2024/01/25 17:49 by azman