int main(void)
{
struct Clock_Struct clock;
//char str_buf[CLOCK_STRING_LENGTH];
buffer *rx_buf = NULL;
buffer *tx_buf = NULL;
uint8_t bytes_read;
GPIO_init();
Timer_init();
UART_init();
NVIC_init();
// 16000000hz
// 0.0000000625s
//
// prescale 16000
// 1000hz
// 0.001s
Clock_reset(&clock);
Timer_set_mode(WTIMER0A, PERIODIC);
Timer_set_config(WTIMER0A, INDEPENDENT);
Timer_set_prescale(WTIMER0A, 16000);
Timer_set_load(WTIMER0A, _wide_timer_load);
Timer_enable_interrupt(WTIMER0A);
Timer_enable(WTIMER0A);
/*Timer_set_mode(TIMER0A, PERIODIC);
Timer_set_config(TIMER0A, INDEPENDENT);
Timer_set_prescale(TIMER0A, 160);
Timer_set_load(TIMER0A, 50000);
Timer_enable_interrupt(TIMER0A);
Timer_enable(TIMER0A);*/
tx_buf = get_buffer();
strncpy(tx_buf->buf, "Clock application starting...\n\r", 32);
tx_buf->fill = 32;
UART_tx_message(tx_buf);
tx_buf = NULL;
tx_buf = get_buffer();
Clock_to_string(&clock, tx_buf->buf, CLOCK_STRING_LENGTH);
tx_buf->fill = CLOCK_STRING_LENGTH;
UART_tx_message(tx_buf);
tx_buf = NULL;
while (1)
{
if (_output_flag)
{
Clock_tick(&clock);
if (_current_time_message_flag)
{
/*str_buf = get_buffer();
Clock_to_string(&clock, str_buf->buf, CLOCK_STRING_LENGTH);
str_buf->fill = CLOCK_STRING_LENGTH;
//UART_out_string(str_buf);
UART_tx_message(str_buf);*/
tx_buf = get_buffer();
Clock_to_string(&clock, tx_buf->buf, CLOCK_STRING_LENGTH);
tx_buf->fill = CLOCK_STRING_LENGTH;
UART_tx_message(tx_buf);
tx_buf = NULL;
}
_output_flag = 0;
}
// UART RX FIFO is half filled
if (_rx_fill_flag)
{
if (rx_buf == NULL)
{
rx_buf = UART_rx_message();
}
bytes_read = UART_read_bytes(rx_buf->buf + rx_buf->fill, FILL_LEVEL_BYTES);
rx_buf->fill += bytes_read;
_rx_carriage_return_received_flag = received_carriage_return(rx_buf->buf + rx_buf->fill, bytes_read);
_rx_fill_flag = 0;
}
// UART RX FIFO timed out
if (_rx_timeout_flag)
{
if (rx_buf == NULL)
{
rx_buf = UART_rx_message();
}
bytes_read = UART_read_bytes(rx_buf->buf + rx_buf->fill, FILL_LEVEL_BYTES);
rx_buf->fill += bytes_read;
_rx_carriage_return_received_flag = received_carriage_return(rx_buf->buf + rx_buf->fill, bytes_read);
_rx_timeout_flag = 0;
}
if (_rx_carriage_return_received_flag)
{
rx_buf->buf[(rx_buf->fill)++] = '\n';
rx_buf->buf[(rx_buf->fill)++] = '\0';
_rx_input_flag = 1;
_rx_carriage_return_received_flag = 0;
}
if (_rx_input_flag)
{
char h_str[3];
char m_str[3];
uint8_t h;
uint8_t m;
_rx_input_command_enum = parse_command(rx_buf->buf);
switch (_rx_input_command_enum)
{
case SET_TIME:
h_str[0] = rx_buf->buf[1]; m_str[0] = rx_buf->buf[4];
h_str[1] = rx_buf->buf[2]; m_str[1] = rx_buf->buf[5];
h_str[2] = '\0'; m_str[2] = '\0';
h = atoi(h_str);
m = atoi(m_str);
Clock_set(&clock, h, m, 0);
break;
case PAUSE:
pause_output();
break;
case CONTINUE:
continue_output();
break;
case FASTER:
faster_timer();
break;
case SLOWER:
slower_timer();
break;
case INVALID:
default:
break;
}
tx_buf = rx_buf;
rx_buf = NULL;
_rx_input_flag = 0;
}
if (tx_buf != NULL)
{
if (_rx_input_command_enum != INVALID)
{
UART_tx_message(tx_buf);
tx_buf = NULL;
}
else
{
release_buffer(tx_buf);
tx_buf = NULL;
}
}
if (_button_pressed_flag)
{
tx_buf = get_buffer();
strncpy(tx_buf->buf, "Button Pressed\r\n", 17);
tx_buf->fill = 17;
UART_tx_message(tx_buf);
tx_buf = NULL;
_button_pressed_flag = 0;
}
}
buffer_queue_clean();
}
/**
Start a timer.
Specify if you'd like the timer to repeat and, if so, the interval at which
you'd like it to repeat. If you have set up a handler with setHandler() then your
handler function will get called at the specified interval. If the timer is already
running, this will reset it.
@param millis The number of milliseconds
@param repeat Whether or not to repeat - true by default.
*/
int Timer_start( Timer *timer, int millis, bool repeat, bool freeOnStop )
{
// debug
if (millis < 0) {
panic("Timer_start");
return CONTROLLER_ERROR_ILLEGAL_PARAMETER_VALUE;
}
//timer->started = timeval;
timer->started = Timer_tick_count();
timer->value = millis;
timer->timeCurrent = 0;
timer->timeInitial = millis * TIMER_CYCLES_PER_MS;
timer->repeat = repeat;
timer->freeOnStop = freeOnStop;
Timer *nextEntry = timer->next;
timer->next = NULL;
TRACE_TMR(">>Timer_start %x %d %d %d %d\r\n", timer, millis, repeat, freeOnStop, timer_manager.servicing);
// this could be a lot smarter - for example, modifying the current period?
if (sync && !timer_manager.servicing ) {
Task_enterCritical();
//xSemaphoreTake(timer_mutex, -1);
}
TIMER_DBG_PROCESSING(true);
if ( !timer_manager.running )
{
// Timer_SetActive( true );
Timer_setTimeTarget( timer->timeInitial );
Timer_enable();
}
/*
// Calculate how long remaining
int target = Timer_getTimeTarget();
int timeCurrent = Timer_getTime();
int remaining = target - timeCurrent;
TRACE_TMR("t %d tc %d r %d\r\n", target, timeCurrent, remaining);
*/
// Get the entry ready to roll
timer->timeCurrent = timer->timeInitial;
// Add entry
Timer* first = timer_manager.first;
timer_manager.first = timer;
timer->next = first;
// Are we actually servicing an interupt right now?
if ( !timer_manager.servicing )
{
TRACE_TMR("srv 0\r\n");
// No - so does the time requested by this new timer make the time need to come earlier?
// first, unlink the timer
Timer *te = timer;
while (te) {
if (te->next && te->next == timer) {
te->next = nextEntry;
TRACE_TMR("Unlinking from the list %x\r\n", nextEntry);
break;
}
te = te->next;
}
// Calculate how long remaining
int target = Timer_getTimeTarget();
int timeCurrent = Timer_getTime();
int remaining = target - timeCurrent;
TRACE_TMR("t %d tc %d r %d\r\n", target, timeCurrent, remaining);
TRACE_TMR("%d < %d %d\r\n", timer->timeCurrent, remaining, TIMER_MARGIN);
if ( timer->timeCurrent < ( remaining - TIMER_MARGIN ) )
{
// Damn it! Reschedule the next callback
Timer_setTimeTarget( target - ( remaining - timer->timeCurrent ));
TRACE_TMR("%x rc %d cv %d\r\n", timer, timer_manager.tc->TC_RC, timer_manager.tc->TC_CV);
// pretend that the existing time has been with us for the whole slice so that when the
// IRQ happens it credits the correct (reduced) time.
timer->timeCurrent += timeCurrent;
}
else
{
// pretend that the existing time has been with us for the whole slice so that when the
// IRQ happens it credits the correct (reduced) time.
timer->timeCurrent += timeCurrent;
TRACE_TMR("sch %d\r\n", timer->timeCurrent);
}
}
else
{
TRACE_TMR("srv 1\r\n");
// Yep... we're servicing something right now
// Make sure the previous pointer is OK. This comes up if we were servicing the first item
// and it subsequently wants to delete itself, it would need to alter the next pointer of the
// the new head... err... kind of a pain, this
if ( timer_manager.previous == NULL )
timer_manager.previous = timer;
// Need to make sure that if this new time is the lowest yet, that the IRQ routine
// knows that. Since we added this entry onto the beginning of the list, the IRQ
// won't look at it again
if ( timer_manager.nextTime == -1 || timer_manager.nextTime > timer->timeCurrent )
timer_manager.nextTime = timer->timeCurrent;
}
TIMER_DBG_PROCESSING(false);
if (sync && !timer_manager.servicing ) {
Task_exitCritical();
//xSemaphoreGive(timer_mutex);
}
TRACE_TMR("<<Timer_start %x\r\n", timer);
return CONTROLLER_OK;
}