nRF52832 Shockburst (not Enhanced) compatibility

RE: nRF52832 Shockburst (not Enhanced) compatibility

Kenneth — Thu, 18 Feb 2021 15:21:45 GMT

Thanks for sharing the details. There is one note on the 250kbps mode that it is: Deprecated
https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.nrf52832.ps.v1.1/radio.html#register.MODE

The 250kbps mode is no longer qualified or tested, and you will find in the electrical specifications that there are no electrical parameters listed for this mode.

RE: nRF52832 Shockburst (not Enhanced) compatibility

Julian Schindler — Thu, 18 Feb 2021 14:38:59 GMT

I just got the same problem,

and found a solution by using this example: \nRF5_SDK_14.2.0_17b948a\examples\peripheral\radio\receiver

I modified the following files to communicate (Rx/Tx) successful between NRF52832 and NRF24L01+

Shockburst (not ESB)
250kBit
No auto ACK
Default NRF24L01 RX pipe0 address (0xE7E7E7E7E7)
Address len 5 byte
fixed payload len: 32 byte
CRC 16 bit

main.c

static uint32_t packet; /**< Packet to transmit. */
static uint8_t packet[32]; /**< Packet to receive 32 byte. */

radio_config.c

void radio_configure()

{

NRF_RADIO->MODE = (RADIO_MODE_MODE_Nrf_1Mbit << RADIO_MODE_MODE_Pos);

NRF_RADIO->MODE = (RADIO_MODE_MODE_Nrf_250Kbit << RADIO_MODE_MODE_Pos);

...

| ((uint32_t)swap_bits(0xC0) << 0); // Prefix byte of address 0 converted to nRF24L series format

| ((uint32_t)swap_bits(0xE7) << 0); // Prefix byte of address 0 converted to nRF24L series format - default NRF24L01

....

NRF_RADIO->BASE0 = bytewise_bitswap(0x01234567UL); // Base address for prefix 0 converted to nRF24L series format
NRF_RADIO->BASE0 = bytewise_bitswap(0xE7E7E7E7UL); // Base address for prefix 0 converted to nRF24L series format - default

}

radio_config.h
#define PACKET_STATIC_LENGTH (1UL) //!< Packet static length in bytes
#define PACKET_STATIC_LENGTH (32UL) //!< Packet static length in bytes

RE: nRF52832 Shockburst (not Enhanced) compatibility

Kenneth — Thu, 18 Feb 2021 14:17:17 GMT

Hello,

It is possible to setup the packet format to the legacy SB, however the nRF52-series don't support the 250kbps mode, so unfortunately it won't work. The nRF51822 can support 250kbps, the latest nRF5 SDK that support the nRF51822 is nRF5 SDK v12.3, and the closest example would be:

https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.sdk5.v12.3.0/nrf_dev_radio_tx_example.html

https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.sdk5.v12.3.0/nrf_dev_radio_rx_example.html

Best regards,
Kenneth