// format and display eeprom data on lcd
void show_eeprom_data(EEPROM_DATA *data){
lcd_line_three();
fprintf_P(&lcd_stream, PSTR("%1d %s %04X %02X %4.2f"),
data->need_initalization,
data->author,
data->read_count,
data->brightness,
data->version
);
}
void getTemp() {
uint16_t last_sample = 0;
double this_temp;
double temp_avg;
uint16_t i;
temp_avg = 0.0;
for (i=0; i<500; i++) {
last_sample = adc_read();
this_temp = sampleToFahrenheit(last_sample);
temp_avg = temp_avg + this_temp/500.0;
}
double c = fahrenheitToCelsius(temp_avg);
double k = celsiusToKelvin(c);
// write message to LCD
lcd_init();
FILE lcd_stream = FDEV_SETUP_STREAM(lcd_putchar, 0, _FDEV_SETUP_WRITE);
lcd_home();
lcd_write_string(PSTR("ADC: "));
lcd_write_int16(last_sample);
lcd_write_string(PSTR(" of 1024 "));
lcd_line_two();
fprintf_P(&lcd_stream, PSTR("%.2f"), temp_avg);
lcd_write_data(0xdf);
lcd_write_string(PSTR("F"));
lcd_line_three();
fprintf_P(&lcd_stream, PSTR("%.2f"), c);
lcd_write_data(0xdf);
lcd_write_string(PSTR("C"));
lcd_line_four();
fprintf_P(&lcd_stream, PSTR("%.2f"), k);
lcd_write_data(0xdf);
lcd_write_string(PSTR("K"));
}
void poll(){
// Main polling loop
// Check for a character from the USART
// See if there is a command comming in
if (uart_char_is_waiting()) {
char c = uart_read();
// Update the command state-machine
if (c == '\n' || c == '\r' ) {
// End of a command, process it and reset the command string
if (current_command == COMMAND_NONE) {
} else if (current_command == COMMAND_INFLATE) {
syringe_inflate();
current_state = STATE_INFLATE;
} else if (current_command == COMMAND_DEFLATE) {
syringe_deflate();
current_state = STATE_DEFLATE;
} else if (current_command == COMMAND_SET_PRESSURE) {
int ret = sscanf_P(value_str, PSTR("%d"), &target_pressure);
// printf_P(PSTR("1 = %d\r\n"), ret );
// printf_P(PSTR("2 = %d\r\n"), target_pressure );
}
value_str_i = 0;
current_command = COMMAND_NONE;
current_command_state = CMD_STATE_COMMAND;
} else {
// In a command string
if (current_command_state == CMD_STATE_COMMAND) {
// Command character
if (c == 'i') {
// Inflate
current_command = COMMAND_INFLATE;
} else if (c == 'd') {
// Deflate
current_command = COMMAND_DEFLATE;
} else if (c == 'p') {
// Set pressure point
current_command = COMMAND_SET_PRESSURE;
} else {
current_command = COMMAND_NONE;
}
current_command_state = CMD_STATE_EQUAL;
} else if (current_command_state == CMD_STATE_EQUAL) {
// Assume the second char is always '='
current_command_state = CMD_STATE_VALUE;
} else if (current_command_state == CMD_STATE_VALUE) {
// In value part of command
value_str[value_str_i++] = c;
if (value_str_i >= MAX_VALUE_LENGTH) {
value_str_i = MAX_VALUE_LENGTH-1;
}
value_str[value_str_i] = 0; // Write NULL terminator
}
}
}
// Check the current pressure
// take 100 samples and average them!
// holder variables for temperature data
uint16_t last_sample = 0;
double this_temp;
double pres_avg = 0.0;
uint8_t i;
for(i=0; i<100; i++) {
last_sample = adc_read();
//this_temp = sampleTokPi(last_sample);
this_temp = last_sample;
// add this contribution to the average
pres_avg = pres_avg + this_temp/100.0;
}
// Check to see if we hit the target presure
if ( current_state == STATE_INFLATE ) {
if ( pres_avg >= target_pressure ) {
// Stop Inflating
syringe_off();
current_state = STATE_IDLE;
}
} else if ( current_state == STATE_DEFLATE ) {
if ( pres_avg <= target_pressure ) {
// Stop Deflating
syringe_off();
current_state = STATE_IDLE;
}
}
// write message to LCD
lcd_home();
lcd_write_string(PSTR("ADC: "));
lcd_write_int16(last_sample);
lcd_write_string(PSTR(" of 1024 "));
lcd_line_two();
if ( current_state == STATE_IDLE ) {
fprintf_P(&lcd_stream, PSTR("State: Idle "));
} else if ( current_state == STATE_RECV ) {
fprintf_P(&lcd_stream, PSTR("State: Recv "));
} else if ( current_state == STATE_INFLATE ) {
fprintf_P(&lcd_stream, PSTR("State: Inflate "));
} else if ( current_state == STATE_DEFLATE ) {
fprintf_P(&lcd_stream, PSTR("State: Deflate "));
}
lcd_line_three();
fprintf_P(&lcd_stream, PSTR("Target Pres: %d"), target_pressure );
// write message to serial port
//printf_P(PSTR("%.2f degrees F\r\n"), temp_avg);
//printf_P(PSTR("Pres = %d\r\n"), target_pressure );
//printf_P(PSTR("Value = %s\r\n"), value_str );
}
