TELINK SEMICONDUCTOR TLSR8232 - Page 185

Telink TLSR8232 BLE SDK Developer Handbook
AN-19112700-E1 184 Ver.1.0.0
data
FifoTask_data
FifoTask_idle_repeat*n
FifoTask_repeat*n
repeat
IR dma fifo done
interrupt
IR dma fifo done
interrupt
IR dma fifo done
interrupt
IR start
110 mS * n 110 mS * n
repeat
repeat
repeat repeat
110mS
……
1
n
……
1
n
2,3...
2,3...
……
……
Figure 10-6 IR Timing 2
As per the IR timing design above, corresponding code in SW flow is shown as below:
At IR start, invoke the function “ir_nec_send”, enable FifoTask_data, and use interrupt to
control the following flow. In the interrupt when FifoTask_data is finished, enable
FifoTask_idle. In the interrupt when FifoTask_idle is finished, enable FifoTask_repeat.
Before manually stopping IR DMA FIFO mode, FifoTask_repeat is executed continually.
void ir_nec_send(u8 addr1, u8 addr2, u8 cmd)
{
//Add FifoTask_data to Dma
ir_send_ctrl.is_sending = IR_SENDING_DATA;
ir_send_ctrl.sending_start_time = clock_time();
pwm_start_dma_ir_sending();
}
void rc_ir_irq_prc(void)
{
if(reg_pwm_irq_sta & FLD_IRQ_PWM0_IR_DMA_FIFO_DONE)
{
reg_pwm_irq_sta = FLD_IRQ_PWM0_IR_DMA_FIFO_DONE;
if(ir_send_ctrl.repeat_enable){
if(ir_send_ctrl.is_sending == IR_SENDING_DATA){
ir_send_ctrl.is_sending = IR_SENDING_REPEAT;
//Add FifoTask_idle_repeat*n to Dma
pwm_start_dma_ir_sending();
}