kingkevin/led_clock-old
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minor cleanup

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This commit is contained in:
King Kévin 2016-03-25 19:19:34 +01:00
parent 0fe1994cc9
commit d674488e2a
1 changed files with 14 additions and 17 deletions
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31
main.c
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@ -49,11 +49,10 @@ The time is read from a DS1307 RTC module.
volatile bool button_flag = false; /**< flag set if board user button has been pressed */
/** @} */
/** the number of ticks in one second
* @note the other values are derived from this value @ref main_ticks
*/
#define TICKS_PER_SECOND 255
#define TICKS_PER_SECOND 256 /**< the number of ticks in one second */
#define SQUARE_WAVE_FREQUENCY 1 /**< square wave output frequency from the RTC IC */
/** @defgroup main_ticks ticks per time units
* @note these are derived from TICKS_PER_SECOND
* @note I have to use type variables because defines would be stored in signed integers, leading to an overflow it later calculations
* @{
*/
@ -91,18 +90,18 @@ int _write(int file, char *ptr, int len)
void led_on(void)
{
#ifdef SYSTEM_BOARD
#if defined(SYSTEM_BOARD) || defined(BLUE_PILL)
gpio_clear(LED_PORT, LED_PIN);
#elif MAPLE_MINI
#elif defined(MAPLE_MINI)
gpio_set(LED_PORT, LED_PIN);
#endif
}
void led_off(void)
{
#ifdef SYSTEM_BOARD
#if defined(SYSTEM_BOARD) || defined(BLUE_PILL)
gpio_set(LED_PORT, LED_PIN);
#elif MAPLE_MINI
#elif defined(MAPLE_MINI)
gpio_clear(LED_PORT, LED_PIN);
#endif
}
@ -288,7 +287,7 @@ int main(void)
// setup RTC module
rtc_setup(); // setup RTC module
rtc_write_square_wave(1); // set square wave output to 1 Hz
rtc_write_square_wave(SQUARE_WAVE_FREQUENCY); // set square wave output frequency
printf("welcome to the CuVoodoo LED clock\n"); // print welcome message
led_on(); // switch on LED to indicate setup completed
@ -311,31 +310,30 @@ int main(void)
button_flag = false; // reset button flag
char c = ' '; // to store received character
bool char_flag = false; // a new character has been received
/* toggle the LED with every transmitted character */
while (true) { // infinite loop
while (usart_received) { // echo every received character
while (usart_received) { // data received over UART
action = true; // action has been performed
led_toggle(); // toggle LED
c = usart_getchar(); // store receive character
char_flag = true; // notify character has been received
}
while (cdcacm_received) { // echo every received character
while (cdcacm_received) { // data received over USB
action = true; // action has been performed
led_toggle(); // toggle LED
c = usart_getchar(); // store receive character
char_flag = true; // notify character has been received
}
while (char_flag) {
while (char_flag) { // user data received
char_flag = false; // reset flag
action = true; // action has been performed
printf("%c",c); // echo receive character
}
while (button_flag) {
while (button_flag) { // user pressed button
button_flag = false; // reset flag
action = true; // action has been performed
led_toggle(); // toggle LED
}
while (square_wave_flag) {
while (square_wave_flag) { // time passed
square_wave_flag = false; // reset flag
action = true; // action has been performed
led_toggle();
@ -344,8 +342,7 @@ int main(void)
clock_set_time(current_time); // set time
printf("it is now %02lu:%02lu:%02lu\n", current_time/ticks_hour, (current_time%ticks_hour)/ticks_minute, (current_time%ticks_minute)/ticks_second); // display time
}
// go to sleep if nothing had to be done, else recheck for activity
if (action) {
if (action) { // go to sleep if nothing had to be done, else recheck for activity
action = false;
} else {
__WFI(); // go to sleep