Posted on July 06, 2018 at 07:27Hi,
I'm using a Nucleo-F401RE whith HSE at 9.8304MHz.
I try to receive, on UART6, IRDA frames of unknown dimension : from 4 to 60 bytes max; the third code received specify, by a table, the length of the frame. (STX, DEST ADDRESS, COMMAND_CODE, (N-PARAMETERS))
Interrupt is enabled and I'm using receiveng byte after byte:
HAL_IRDA_Receive_IT(&hirda6, DataTemp,1);
IRDA settings are:
hirda6.Init.BaudRate = 38400;
hirda6.Init.WordLength = IRDA_WORDLENGTH_8B;
hirda6.Init.Parity = IRDA_PARITY_NONE;
hirda6.Init.Mode = IRDA_MODE_TX_RX;
hirda6.Init.Prescaler = 1;
hirda6.Init.IrDAMode = IRDA_POWERMODE_NORMAL;
Receiving is made by a personal procedure due to the arriving frames:
void USART6_IRQHandler(void)
{
uint32_t isrflags = READ_REG(hirda6.Instance->SR);
uint32_t cr1its = READ_REG(hirda6.Instance->CR1);
/*UART Receiver? -----------------------------------------------*/
if(((isrflags & USART_SR_RXNE) != RESET) && ((cr1its & USART_CR1_RXNEIE) != RESET))
{
/*data ready?*/
if(hirda6.Instance->SR & USART_SR_RXNE)
{
temp=hirda6.Instance->DR;
Buffer_irDA_RX[irDA_RX_index] = temp;
if(irDA_RX_index++>irDA_RX_MAX
dataAnalize(); //where I close the communication and reset IRDA
else if(irDA_R_index==3)
irDA_RX_MAX=Table[temp];
}
}
The question: after 4 bytes received system 'stops' the reception for sometime, so some bytes are irrecuperable (may be 5 or 6) From debugger NO ERRORS FOUND OF ANY TYPE ON IRDA
Some Idea? many thanks.
Luciano
