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igmarin/main.c

Last active Sep 3, 2017
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Main ejemplo LCD
#include <hidef.h> /* common defines and macros */
#include "derivative.h" // Definiciones de la familia del micro
#include <mc9s12c32.h> /******* Definiciones específicas del micro *******/
#include "LCD.H"
#include "PLL.H"
#pragma LINK_INFO DERIVATIVE "mc9s12c32"
void TimerInit(void){
DDRT = 0x01; // PT.0 como salida (LED), PT.1 y PT2 como entradas (Switch)
DDRA = 0x01; // PA.0 como salida (LED)
DDRB = 0x04; // PB.4 como salida (LED)
TSCR1 = 0x80; // Enable TCNT, 24MHz in both boo tand run modes
TSCR2 = 0x04; // divide by 16 TCNT prescale, TCNT at 667nsec
PACTL = 0; // timer prescale used for TCNT
/* Bottom three bits of TSCR2 (PR2,PR1,PR0) determine TCNT period
divide 24MHz E clock
000 1 42ns TOF 2.73ms
001 2 84ns TOF 5.46ms
010 4 167ns TOF 10.9ms
011 8 333ns TOF 21.8ms
100 16 667ns TOF 43.7ms
101 32 1.33us TOF 87.4ms
110 64 2.67us TOF 174.8ms
111 128 5.33us TOF 349.5ms */
// Be careful, TSCR1 and TSCR2 maybe set in other rituals
}
//---------------------mwait---------------------
// wait specified number of msec
// Input: number of msec to wait
// Output: none
// assumes TCNT timer is running at 667ns
void mwait(unsigned short msec){
unsigned short startTime;
for(; msec>0; msec--){
startTime = TCNT;
while((TCNT-startTime) <= 1500){}
}
}
//---------------------check---------------------
// if LCD broken toggle LED1 at 2Hz
// Input: last LCD status, 0 means bad
// Output: none
// Error: if status is zero, this function will not return
void check(short status){ // 0 if LCD is broken
if(status ==0){
for(;;) {
PORTA ^= 0x01; // fast toggle LEDA
mwait(250); // 0.25 sec wait
}
}
}
//---------------------swait---------------------
// wait specified 2 sec, then clear LCD
// Input: none
// Output: none
// uses mswait and TCNT timer
void swait(void){
PORTB ^= 0x04; // toggle LEDB
mwait(2000); // 2 sec wait
check(LCD_Clear());
}
//---------------------blank---------------------
// move cursor to second half of LCD display
// 32 spaces from address 08 to 40
// Input: none
// Output: none
void blank(void){
check(LCD_OutString(" "));
}
void main(void) {
// unsigned char cont;
PLL_Init(); // set E clock to 24 MHz
TimerInit(); // enable Port T
check(LCD_Open(LCDINC+LCDNOSHIFT,
LCDNOCURSOR+LCDNOBLINK,
LCDNOSCROLL+LCDLEFT,
LCD2LINE+LCD7DOT));
check(LCD_OutString("9S12C32 ")); blank();
check(LCD_OutString("Valvano ")); swait();
//asm cli // allows debugger to run
for(;;) {
/* if ( (PTT & 0x02) != 0){
if (cont<15){
cont++;
mwait(50); ;
} else if (cont>16){
cont = 0;
mwait(50);
}
}
if ( (PTT & 0x04) != 0){
if (cont>0){
cont--;
mwait(50);
} else if (cont<0){
cont = 15;
mwait(50);
}
} */
//check(LCD_OutString("ABCDEFGH "));
//short(LCD_OutDec(unsigned char *cont));
//blank();
check(LCD_OutString("IJKLMNOP 1 1 1 1")); swait();
check(LCD_OutString("01234567 2 2 2 2")); blank();
check(LCD_OutString("890,./<> 3 3 3 3")); swait();
check(LCD_OutString("abcdefgh 4 4 4 4")); blank();
check(LCD_OutString("ijklmnop 5 5 5 5")); swait();
check(LCD_OutString("!@#$%^&* 6 6 6 6")); blank();
check(LCD_OutString("()_+-=[] 7 7 7 7")); swait();
}
}
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