nrf24L01+ not all packages sent or received?

[Sergy]

Hi,

Im trying to send 20 packages of 30bytes each as fast as possible, so I created the following loop:

for( pack=0; pack<20; pack++) { w_tx_payload_noack(30, MegaBuffer[pointerOUT]); msprf24_activate_tx(); //__delay_cycles(5000); }

On the receiving side I get only 6 packets. If I decrease number to 10 packets then I receive only 3.

Im sure there should be a logical explanation. I tried to add a delay into the loop it didnt help. Here are the functions used:

void msprf24_activate_tx() { char c; msprf24_standby(); // Cancel any outstanding TX interrupt w_reg(RF24_STATUS, RF24_TX_DS|RF24_MAX_RT); c = r_reg(RF24_STATUS); // Pulse CE for 10us to activate PTX pulse_ce(); }

void pulse_ce() { CE_HIGH(); __delay_cycles(CE_HIGH_TIME); CE_LOW(); }

Any idea on where Im misusing the device?

Thanks, Sergey

[Sergy]

Hi Mike,

Ive adjusted the code to check for space in TX FIFO:

msprf24_standby(); int pack=0; int cnt = 10;

		for( pack=0; pack<100; pack++)
		{
			while((r_reg(RF24_FIFO_STATUS) & RF24_FIFO_FULL));
			w_tx_payload_noack(30, beacon_buf);
			pulse_ce();
			//__delay_cycles(1800);
			//msprf24_activate_tx();
		}

Unfortunately it doesnt help anyways.

Here is the standby function:

// Enable Standby-I, 26uA power draw void msprf24_standby() { unsigned char state = msprf24_current_state(); if (state == RF24_STATE_NOTPRESENT || state == RF24_STATE_STANDBY_I) return; CE_LOW(); msprf24_set_config(RF24_PWR_UP); // PWR_UP=1, PRIM_RX=0 if (state == RF24_STATE_POWERDOWN) // If we're powering up from deep powerdown... __delay_cycles(DELAY_CYCLES_5MS); // Then wait 5ms for the crystal oscillator to spin up. }