/*************************************************************************
* Description: Task for blinking LED
* Returns: none
* Notes: none
*************************************************************************/
void led_task(
void)
{
if (Off_Delay_Milliseconds_1) {
if (timer_elapsed_milliseconds(TIMER_LED_1, Off_Delay_Milliseconds_1)) {
Off_Delay_Milliseconds_1 = 0;
led_off(LED_1);
}
}
if (Off_Delay_Milliseconds_2) {
if (timer_elapsed_milliseconds(TIMER_LED_2, Off_Delay_Milliseconds_2)) {
Off_Delay_Milliseconds_2 = 0;
led_off(LED_2);
}
}
if (Off_Delay_Milliseconds_3) {
if (timer_elapsed_milliseconds(TIMER_LED_3, Off_Delay_Milliseconds_3)) {
Off_Delay_Milliseconds_3 = 0;
led_off(LED_3);
}
}
if (Off_Delay_Milliseconds_4) {
if (timer_elapsed_milliseconds(TIMER_LED_4, Off_Delay_Milliseconds_4)) {
Off_Delay_Milliseconds_4 = 0;
led_off(LED_4);
}
}
}
void rs485_turnaround_delay(
void)
{
uint16_t turnaround_time;
/* delay after reception before trasmitting - per MS/TP spec */
/* wait a minimum 40 bit times since reception */
/* at least 1 ms for errors: rounding, clock tick */
turnaround_time = 1 + ((Tturnaround * 1000UL) / Baud_Rate);
while (!timer_elapsed_milliseconds(TIMER_SILENCE, turnaround_time)) {
/* do nothing - wait for timer to increment */
};
}
void lse_init(
void)
{
uint32_t LSE_Delay = 0;
struct etimer Delay_Timer;
/* Enable access to the backup register => LSE can be enabled */
PWR_BackupAccessCmd(ENABLE);
/* Enable LSE (Low Speed External Oscillation) */
RCC_LSEConfig(RCC_LSE_ON);
/* Check the LSE Status */
while (1) {
if (LSE_Delay < LSE_FAIL_FLAG) {
timer_elapsed_start(&Delay_Timer);
while (!timer_elapsed_milliseconds(&Delay_Timer, 500)) {
/* do nothing */
}
/* check whether LSE is ready, with 4 seconds timeout */
LSE_Delay += 0x10;
if (RCC_GetFlagStatus(RCC_FLAG_LSERDY) != RESET) {
/* Set flag: LSE PASS */
LSE_Delay |= LSE_PASS_FLAG;
led_ld4_off();
/* Disable LSE */
RCC_LSEConfig(RCC_LSE_OFF);
break;
}
}
/* LSE_FAIL_FLAG = 0x80 */
else if (LSE_Delay >= LSE_FAIL_FLAG) {
if (RCC_GetFlagStatus(RCC_FLAG_LSERDY) == RESET) {
/* Set flag: LSE FAIL */
LSE_Delay |= LSE_FAIL_FLAG;
led_ld4_on();
}
/* Disable LSE */
RCC_LSEConfig(RCC_LSE_OFF);
break;
}
}
}
/*************************************************************************
* Description: Use the silence timer to determine turnaround time.
* Returns: true if turnaround time has expired.
* Notes: none
**************************************************************************/
bool rs485_turnaround_elapsed(
void)
{
return timer_elapsed_milliseconds(&Silence_Timer, rs485_turnaround_time());
}
/*************************************************************************
* Description: Determine the amount of silence on the wire from the timer.
* Returns: true if the amount of time has elapsed
* Notes: none
**************************************************************************/
bool rs485_silence_elapsed(
uint32_t interval)
{
return timer_elapsed_milliseconds(&Silence_Timer, interval);
}
