static void show_help(void)
{
uint8_t i;
for(i = 0; cmds[i].name != 0; i++)
{
softuart_puts(cmds[i].name);
softuart_puts_p(PSTR(" - "));
softuart_puts(cmds[i].help);
softuart_puts_p(PSTR("\r\n"));
}
}
int main(void)
{
static char cmd[10];
char c, *p = cmd;
setup();
while(1)
{
if(softuart_kbhit()) {
c = softuart_getchar();
switch(c)
{
case '\n':
case '\r':
{
softuart_putchar(c);
*p = 0;
p = cmd;
if((cmd[0] == '\0') || (execute_cmd(cmd) == CMD_OK))
softuart_puts_p(PSTR("ok\r\n"));
else
softuart_puts_p(PSTR("error\r\n"));
break;
}
default:
{
if(p < cmd+(sizeof(cmd)))
{
*p++ = c;
softuart_putchar(c);
}
else
{
softuart_putchar(7); // bell
}
}
}
}
}
return 0;
}
// main routine
int main(void)
{
// initiate software-uart for serial communication
softuart_init();
// initialize input and output ports
io_init();
struct {
unsigned heating:1;
unsigned ready:1;
} state;
// pwm-counter
uint8_t pwm_ctr = 0;
// while .. forever
while(1)
{
// read temp
uint16_t val = io_get_temp_adc();
// detect sensor shortage or breakage
if(val < 24 || val > 1000)
{
// write message to serial
softuart_puts_p(PSTR("ACD-Value out of range: "));
softuart_puts_uint16(val);
softuart_putc('\n');
// turn heater off
io_set_heating(0);
// make ready-led blink
io_set_ready(0);
_delay_ms(250);
io_set_ready(1);
_delay_ms(250);
// try again
continue;
}
// pwm switching difference
uint8_t pwm = 0;
if(val > Vshould)
{
pwm = val - Vshould;
}
// pwm switch
if (pwm < pwm_ctr)
{
state.heating = 0;
}
else
{
state.heating = 1;
}
// pwm increases with the temperature rising
// 11+ = heating is always-on
// 5 = heating is 1/2 the time on
// 0 = heating is always-off
if(pwm < 5)
{
state.ready = 1;
}
else if(pwm > 8)
{
state.ready = 0;
}
// pwm counter increment
if(++pwm_ctr >= 10)
pwm_ctr = 0;
// set heater status
io_set_heating(state.heating);
// set ready status
io_set_ready(state.ready);
// write status to serial
softuart_puts_p(PSTR("ADC-Value: "));
softuart_puts_uint16(val);
softuart_puts_p(PSTR(", ADC-Goal: "));
softuart_puts_uint16(Vshould);
softuart_puts_p(PSTR(", Ready: "));
softuart_puts_uint16(state.ready);
softuart_puts_p(PSTR(", Heating: "));
softuart_puts_uint16(state.heating);
softuart_putc('\n');
// wait 1/4 second
_delay_ms(250);
}
// end of program
return 0;
}
static void show_version(void)
{
softuart_puts_p(PSTR("c128power v1.0\r\n"));
}
