/*
* idx indicate Timer0L, Timer0H, Timer1L,Timer1H
* Timer affect circular in buffer.
*/
void stop_timer(uint8_t idx)
{
uint8_t ep = (idx + 1) | 0x80;
circular_buffer_pools_t * cb_in = circular_buffer_pointer(ep);
uint16_t timer_reload = circular_buffer_timer_reload(cb_in);
switch(idx)
{
case 0:
SI32_TIMER_A_stop_low_timer (SI32_TIMER_0);
SI32_TIMER_A_clear_low_overflow_interrupt (SI32_TIMER_0);
SI32_TIMER_A_set_low_count (SI32_TIMER_0, timer_reload);
break;
case 1:
SI32_TIMER_A_stop_high_timer (SI32_TIMER_0);
SI32_TIMER_A_clear_high_overflow_interrupt (SI32_TIMER_0);
SI32_TIMER_A_set_high_count (SI32_TIMER_0, timer_reload);
break;
case 2:
SI32_TIMER_A_stop_low_timer (SI32_TIMER_1);
SI32_TIMER_A_clear_low_overflow_interrupt (SI32_TIMER_1);
SI32_TIMER_A_set_low_count (SI32_TIMER_1, timer_reload);
break;
case 3:
SI32_TIMER_A_stop_high_timer (SI32_TIMER_1);
SI32_TIMER_A_clear_high_overflow_interrupt (SI32_TIMER_1);
SI32_TIMER_A_set_high_count (SI32_TIMER_1, timer_reload);
break;
}
circular_buffer_put_read_ready(cb_in,1);
}
void wave_4k_init(void)
{
SI32_TIMER_A_Type* SI32_TIMER = SI32_TIMER_1;
uint16_t reload_value = get_wave_reload_value(WAVE_4K);
SI32_CLKCTRL_A_enable_apb_to_modules_0(SI32_CLKCTRL_0, SI32_CLKCTRL_A_APBCLKG0_TIMER1);
SI32_TIMER_A_select_low_auto_reload_mode(SI32_TIMER);
SI32_TIMER_A_enable_low_overflow_interrupt(SI32_TIMER);
SI32_TIMER_A_disable_low_extra_interrupt(SI32_TIMER);
SI32_TIMER_A_select_low_clock_source_apb_clock(SI32_TIMER);
SI32_TIMER_A_set_low_count(SI32_TIMER,reload_value);
SI32_TIMER_A_set_low_reload(SI32_TIMER,reload_value);
SI32_TIMER_A_clear_low_overflow_interrupt(SI32_TIMER);
NVIC_ClearPendingIRQ( TIMER1L_IRQn );
NVIC_EnableIRQ( TIMER1L_IRQn );
}
void TIMER1L_IRQHandler(void)
{
SI32_TIMER_A_clear_low_overflow_interrupt(SI32_TIMER_1);
NVIC_ClearPendingIRQ( TIMER1L_IRQn );
exciter_cnt++;
switch(exciter_state)
{
case EXCITER_IDLE:
break;
case EXCITER_BURST:
if(burst_cnt < CARRIER_BURST_LEN)
{
wave_125k_start();
burst_cnt++;
}
else
{
wave_125k_stop();
burst_cnt = 0;
preamble_cnt = 0;
exciter_state = EXCITER_PREAMBLE;
}
break;
case EXCITER_PREAMBLE:
if(preamble_cnt < PREAMBLE_LEN-1)
{
if(preamble_cnt&0x01)
{
wave_125k_stop();
}
else
{
wave_125k_start();
}
preamble_cnt++;
}
else
{
if(preamble_cnt&0x01)
{
wave_125k_stop();
}
else
{
wave_125k_start();
}
preamble_cnt = 0;
pattern_cnt = 0;
pattern_temp = pattern_data;
exciter_state = EXCITER_PATTERN;
}
break;
case EXCITER_PATTERN:
if(pattern_cnt < PATTERN_LEN-1)
{
if(pattern_temp&0x8000)
{
wave_125k_start();
}
else
{
wave_125k_stop();
}
pattern_temp <<= 1;
pattern_cnt++;
}
else
{
if(pattern_temp&0x8000)
{
wave_125k_start();
}
else
{
wave_125k_stop();
}
pattern_cnt = 0;
exciter_data_cnt = 0;
exciter_send_index = 0;
exciter_data_len = (exciter_man_data.data_len)<<3;
p_exciter_send_buff = exciter_man_data.data;
exciter_state = EXCITER_DATA;
}
break;
case EXCITER_DATA:
if(exciter_data_cnt < exciter_data_len)
{
if(!(exciter_data_cnt & 0x07))
exciter_send_temp = *p_exciter_send_buff++;
if(exciter_send_temp&EXCITER_MASK)
{
wave_125k_start();
}
else
{
wave_125k_stop();
}
exciter_data_cnt++;
exciter_send_temp <<= 1;
}
else
{
wave_125k_stop();
wave_4k_stop();
exciter_state = EXCITER_IDLE;
exciter_over_event = 1;
}
break;
}
}
