7u83/stc_rpncalc
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This commit is contained in:
Jeff Wang
2019-03-20 03:21:11 -04:00
parent f4f70853c1
commit 84b6888d7e
7 changed files with 119 additions and 8 deletions
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19
src/lcd.c
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@ -150,13 +150,13 @@ static void LCD_OutChar(unsigned char c) {
void LCD_Open(void) {
static int open_error = 0;
if (!OpenFlag) {
//set ports to output
//P2
//set ports to push-pull output M[1:0] = b01
//P2 entire port
P2M1 = 0;
P2M0 = 0xff;
//P3
P3M1 &= ~(0xfe);
P3M0 |= (0xfe);
//P3 pins 7:4
P3M1 &= ~(0xf0);
P3M0 |= (0xf0);
_delay_ms(30); // to allow LCD powerup
outCsrBlindNibble(0x03); // (DL=1 8-bit mode)
@ -251,6 +251,15 @@ short TERMIO_PutChar(unsigned char letter) {
return 1;
}
void LCD_OutNibble(uint8_t x){
x &= 0xf; //ensure only bottom nibble
if (x <= 9){
TERMIO_PutChar(x + '0');
} else {
TERMIO_PutChar(x - 10 + 'a');
}
}
void LCD_Clear() {
if (OpenFlag) {
outCsr(0x01);