diff --git a/USART.c b/USART.c new file mode 100644 index 0000000..875933b --- /dev/null +++ b/USART.c @@ -0,0 +1,55 @@ +/** + * (C) Copyright Collin J. Doering 2015 + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see . +*/ + +/** + * File: USART.c + * Author: Collin J. Doering + * Date: Oct 6, 2015 + */ + +#include +#include "USART.h" +#include + +#ifndef BAUD /* if not defined in Makefile... */ +#define BAUD 9600 /* set a safe default baud rate */ +#endif + +void initUSART(void) { /* requires BAUD */ + UBRR0H = UBRRH_VALUE; /* defined in setbaud.h */ + UBRR0L = UBRRL_VALUE; +#if USE_2X + UCSR0A |= (1 << U2X0); +#else + UCSR0A &= ~(1 << U2X0); +#endif + /* Enable USART transmitter/receiver */ + UCSR0B = (1 << TXEN0) | (1 << RXEN0); + UCSR0C = (1 << UCSZ01) | (1 << UCSZ00); /* 8 data bits, 1 stop bit */ +} + + +void transmitByte(uint8_t data) { + /* Wait for empty transmit buffer */ + loop_until_bit_is_set(UCSR0A, UDRE0); + UDR0 = data; /* send data */ +} + +uint8_t receiveByte(void) { + loop_until_bit_is_set(UCSR0A, RXC0); /* Wait for incoming data */ + return UDR0; /* return register value */ +} diff --git a/USART.h b/USART.h new file mode 100644 index 0000000..170e7ce --- /dev/null +++ b/USART.h @@ -0,0 +1,28 @@ +/** + * (C) Copyright Collin J. Doering 2015 + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see . +*/ + +/** + * File: USART.h + * Author: Collin J. Doering + * Date: Oct 6, 2015 + */ + +void initUSART(void); + +void transmitByte(uint8_t data); + +uint8_t receiveByte(void); diff --git a/lcdOutput.c b/lcdOutput.c index 2e1081c..34219cf 100644 --- a/lcdOutput.c +++ b/lcdOutput.c @@ -31,27 +31,38 @@ #include #include "lcdLib.h" +#include "USART.h" + +void showSomePrases(void) { + const char* data[4] = { "Hello there friend!!\nIsn't it a nice day.\nAnyways, I must go..\nTo a midnight show;)", + "This is some other text. It should be wrapped appropriately.\nIsn't that neat!", + "Welcome! (line 1)\nThis is line 2.\nAnd here is line 3.\nAnd finally, line 4.", + "Finally, this is the\nend; of the array,\nthat is.\nCheers."}; + + for (uint8_t i = 0; i < 4; i++) { + writeStringToLCD(data[i]); + _delay_ms(5000); + clearDisplay(); + } + _delay_ms(3000); +} int main(void) { clock_prescale_set(clock_div_1); STATUS_LED_DDR |= 1 << STATUS_LED; // DEBUG - const char* data[4] = { "Hello there friend!!\nIsn't it a nice day.\nAnyways, I must go..\nTo a midnight show;)", - "This is some other text. It should be wrapped appropriately.\nIsn't that neat!", - "Welcome! (line 1)\nThis is line 2.\nAnd here is line 3.\nAnd finally, line 4.", - "Finally, this is the\nend; of the array,\nthat is.\nCheers."}; + initUSART(); + char serialChar; initLCD(); //initLCDByInternalReset(); - + + showSomePrases(); + while (1) { - for (uint8_t i = 0; i < 4; i++) { - writeStringToLCD(data[i]); - _delay_ms(10000); - clearDisplay(); - } - _delay_ms(3000); + serialChar = receiveByte(); + writeCharToLCD(serialChar); } return 0;