We are trying to max out the wifi throughput via nRF7002 when connected to SPI4. Currently we only achieve around 6.3Mbits/sec (TCP Upload to peer).
When measuring the SPI4 CLK we only see 16Mhz despite configuring 32Mhz in app overlay.
Question: What can we do to configure SPI4 for 32Mhz? Will this lead to higher throughput?
Hardware:
- nRF5340-DK
- nRF7002-EK
- Modifikations: CLK, MISO and MOSI pins are connected to P0.08, P0.10 and P0.09
Software:
- nrf connect sdk version: 2.9.1
- sample: wifi/throughput
- EXTRA_CONF_FILE: overlay-high-performance.conf
- SHIELD: nrf7002ek
- custom app.overlay:
&pinctrl {
spi4_default: spi4_default {
group1 {
psels = <NRF_PSEL(SPIM_SCK, 0, 8)>,
<NRF_PSEL(SPIM_MISO, 0, 10)>,
<NRF_PSEL(SPIM_MOSI, 0, 9)>;
nordic,drive-mode = <NRF_DRIVE_H0H1>;
};
};
spi4_sleep: spi4_sleep {
group1 {
psels = <NRF_PSEL(SPIM_SCK, 0, 8)>,
<NRF_PSEL(SPIM_MISO, 0, 10)>,
<NRF_PSEL(SPIM_MOSI, 0, 9)>;
low-power-enable;
};
};
};
&spi4 {
max-frequency = <33000000>;
clock-frequency = <32000000>;
nrf70: nrf7002-spi@0 {
spi-max-frequency = <33000000>;
};
};
Commandline:
west build -p -b nrf5340dk/nrf5340/cpuapp -- -DSHIELD=nrf7002ek -DEXTRA_CONF_FILE=overlay-high-performance.conf
Zperf:
zperf tcp upload XXX.XXX.XXX.XXX 5001 60 1024