// Manar-ul Islam Swaby // 12/ 2016 // hello.TxRxRGB.44.c // // step response transmit-receive hello-world // 9600 baud FTDI interface // // RGB LED software PWM hello-world // // #include #include #include // #include #include //rgb.44 #define output(directions,pin) (directions |= pin) // set port direction for output #define set(port,pin) (port |= pin) // set port pin #define clear(port,pin) (port &= (~pin)) // clear port pin #define pin_test(pins,pin) (pins & pin) // test for port pin #define bit_test(byte,bit) (byte & (1 << bit)) // test for bit set #define PWM_delay() _delay_us(25) // PWM delay #define led_port PORTA #define led_direction DDRA #define red (1 << PA0) #define green (1 << PA1) #define blue (1 << PA2) //#define button_port PORTA //#define button (1 << PAO) //txrx.44 //#define output(directions,pin) (directions |= pin) // set port direction for output //#define set(port,pin) (port |= pin) // set port pin //#define clear(port,pin) (port &= (~pin)) // clear port pin //#define pin_test(pins,pin) (pins & pin) // test for port pin //#define bit_test(byte,bit) (byte & (1 << bit)) // test for bit set #define bit_delay_time 102 // bit delay for 9600 with overhead #define bit_delay() _delay_us(bit_delay_time) // RS232 bit delay #define half_bit_delay() _delay_us(bit_delay_time/2) // RS232 half bit delay #define settle_delay() _delay_us(100) // settle delay #define char_delay() _delay_ms(10) // char delay #define nloop 100 // loops to accumulate //this is for serial connection to the python script #define serial_port PORTB #define serial_direction DDRB #define serial_pin_out (1 << PB1) #define transmit_port PORTA #define transmit_direction DDRA #define transmit_pin (1 << PA4) void put_char(volatile unsigned char *port, unsigned char pin, char txchar) { // //start bit // clear(*port,pin); bit_delay(); // unrolled loop to write data bits // if bit_test(txchar,0) set(*port,pin); else clear(*port,pin); bit_delay(); if bit_test(txchar,1) set(*port,pin); else clear(*port,pin); bit_delay(); if bit_test(txchar,2) set(*port,pin); else clear(*port,pin); bit_delay(); if bit_test(txchar,3) set(*port,pin); else clear(*port,pin); bit_delay(); if bit_test(txchar,4) set(*port,pin); else clear(*port,pin); bit_delay(); if bit_test(txchar,5) set(*port,pin); else clear(*port,pin); bit_delay(); if bit_test(txchar,6) set(*port,pin); else clear(*port,pin); bit_delay(); if bit_test(txchar,7) set(*port,pin); else clear(*port,pin); bit_delay(); // // stop bit // set(*port,pin); bit_delay(); // // char delay // bit_delay(); } // int main(void) { //bc error message about stating count twice static unsigned char count; static uint16_t up,down,diff; // unsigned char pwm; // // set clock divider to /1 // CLKPR = (1 << CLKPCE); CLKPR = (0 << CLKPS3) | (0 << CLKPS2) | (0 << CLKPS1) | (0 << CLKPS0); // // initialize output pins //don't need the first piece because this is where in the original code it was talking to python script set(serial_port, serial_pin_out); output(serial_direction, serial_pin_out); clear(transmit_port, transmit_pin); output(transmit_direction, transmit_pin); // // // initialize RGB LED pins set(led_port, red); output(led_direction, red); set(led_port, green); output(led_direction, green); set(led_port, blue); output(led_direction, blue); // // init A/D // ADMUX = (0 << REFS1) | (0 << REFS0) // Vcc ref | (0 << MUX5) | (0 << MUX4) | (0 << MUX3) | (1 << MUX2) | (1 << MUX1) | (1 << MUX0); // PA7 ADCSRA = (1 << ADEN) // enable | (1 << ADPS2) | (1 << ADPS1) | (0 << ADPS0); // prescaler /128 // // main loop // while (1) { // // accumulate // up = 0; down = 0; //comment out for loop and then the cummulative nature of up and down for (count = 0; count < nloop; ++count) { // // settle, charge // settle_delay(); set(transmit_port, transmit_pin); // // initiate conversion // ADCSRA |= (1 << ADSC); // // wait for completion // while (ADCSRA & (1 << ADSC)) ; // // save result // //up += ADC; up = ADC; // settle, discharge // settle_delay(); clear(transmit_port, transmit_pin); // // initiate conversion // ADCSRA |= (1 << ADSC); // // wait for completion // while (ADCSRA & (1 << ADSC)) ; // // save result // //down += ADC; down = ADC; diff = up - down; // // //Diff is less than a certain value //Rob says that diff will be around 100-150, so we shall see what happens with this tryout experience. if (diff < 1023) { //if still doesn't work try this one insetad of the what's there. for (count = 0; count < nloop; ++count) { for (count = 0; count < 100; ++count) { set(led_port, red); clear(led_port, green); clear(led_port, blue); for (pwm = 0; pwm < count; ++pwm); PWM_delay(); }} else if (diff = 1023) { //if still doesn't work try this one insetad of the what's there. for (count = 0; count < nloop; ++count) { for (count = 0; count < 100; ++count) { clear(led_port, red); set(led_port, green); clear(led_port, blue); for (pwm = 0; pwm < count; ++pwm); PWM_delay(); }} else if (diff > 1023) { for (count = 0; count < 100; ++count) { set(led_port, red); set(led_port, green); clear(led_port, blue); for (pwm = 0; pwm < count; ++pwm); PWM_delay(); }} // else { for (count =0; count <100; ++count) { set (led_port, red); set (led_port, blue); clear (led_port, green); for (pwm=0; pwm < count; ++pwm); PWM_delay(); }} } put_char(&serial_port, serial_pin_out, 1); char_delay(); put_char(&serial_port, serial_pin_out, 2); char_delay(); put_char(&serial_port, serial_pin_out, 3); char_delay(); put_char(&serial_port, serial_pin_out, 4); // // send result // put_char(&serial_port, serial_pin_out, (up & 255)); char_delay(); put_char(&serial_port, serial_pin_out, ((up >> 8) & 255)); char_delay(); put_char(&serial_port, serial_pin_out, (down & 255)); char_delay(); put_char(&serial_port, serial_pin_out, ((down >> 8) & 255)); char_delay(); /*put_char(&serial_port, serial_pin_out, (diff & 255)); char_delay(); put_char(&serial_port, serial_pin_out, ((diff >> 8) & 255)); char_delay();*/ } } // // //My own code. have nothing about the rgb here.