Hi
for few days I seem to got stack in using together UART and radio on nRF21LE01 in ESB mode and I suspect irq_flags = hal_nrf_get_clear_irq_flags(); to be cause of my problem.
What I want to achieve is to communicate to terminal via UART messages every time my receiver gets message from transmitter (nRF51822). The radio part works flawlessly and on the TXs side i.e nRF51822 which works also in ESB mode the radio and UART work happily together.
On RX side the UART also works anywhere in the program but in the NRF_ISR() code section which services received packets. I suspect that irq_flags = hal_nrf_get_clear_irq_flags(); function which supposed to read and clear radio interrupts messes up all interrupts including UARTs.
Am I making some fundamental mistake here? Despite searching web for answers, Nordic FAQ and reading extensively nrf24LE01 related docs I am unable to make this work. Can anyone put me on the right path with this please?
Regards
Adam //----------------------------------------------------------------------------------- The code structure is simple.
main() // Initializes the UART hal_uart_init(UART_BAUD_9K6);
// Wait for XOSC to start to ensure proper UART baudrate while(hal_clk_get_16m_source() != HAL_CLK_XOSC16M) {} Blink(3); //<- just tests that anything happens
// Enable global interrupt EA = 1;
// Enable the radio clock RFCKEN = 1; // Enable RF interrupt RF = 1;
// Print "Hello World" at start-up putstring("\r\nXOSC has started!\r\n"); //<- works!
// Configure radio as primary receiver (PTX) hal_nrf_set_operation_mode(HAL_NRF_PRX);
//This has to be here for nrf24LE01 to receive from nrf51... in ESB hal_nrf_setup_dynamic_payload(0xFF); hal_nrf_enable_dynamic_payload(true); hal_nrf_enable_ack_payload(true); hal_nrf_set_rf_channel(10);
// Power up radio hal_nrf_set_power_mode(HAL_NRF_PWR_UP);
// Enable receiver CE_HIGH();
// Print "Hello World" at start-up putstring("\r\nHaha!\r\n"); //<- works!
for(;;){} }
// Radio interrupt NRF_ISR() { uint8_t irq_flags;
// Read and clear IRQ flags from radio irq_flags = hal_nrf_get_clear_irq_flags(); //<-- Is this my problem?
// If data received if((irq_flags & (1<<(uint8_t)HAL_NRF_RX_DR)) > 0) { // Read payload while(!hal_nrf_rx_fifo_empty()) { hal_nrf_read_rx_payload(payload); } } putstring("\r\nPacket received!\r\n"); //<- DOES NOT WORK! Blink(1); //<- works! }
