- Ask a related questionWhat is a related question?A related question is a question created from another question. When the related question is created, it will be automatically linked to the original question.
I am planning to use CC2500 along with with RFX2401C (external amplifier) for my transmitter RF Module. For this purpose, I am using pins GDO0 & GDO2 of CC2500 for driving TXEN and RXEN of RFX2401C respectively. And I am using the following code (found on GitHub) to work with this configuration.
void CC2500_SetTxRxMode(uint8_t mode)
{
if(mode == TX_EN)
{
CC2500_WriteReg(CC2500_00_IOCFG2, 0x2F);
CC2500_WriteReg(CC2500_02_IOCFG0, 0x2F | 0x40);
}
else
if (mode == RX_EN)
{
CC2500_WriteReg(CC2500_02_IOCFG0, 0x2F);
CC2500_WriteReg(CC2500_00_IOCFG2, 0x2F | 0x40);
}
else
{
CC2500_WriteReg(CC2500_02_IOCFG0, 0x2F);
CC2500_WriteReg(CC2500_00_IOCFG2, 0x2F);
}
}
I believe the TXEN & RXEN pins are active high. With the changes made to registers from above code, I am expecting GDO0 & GD2 to become high when needed.. Is my understanding correct? Or do I need to make some changes?
Hi,
Please find the schematic..
Also, one more thing, do GDO0 & GDO2 become floating anytime? Like if CSN is low but chip is powered (with 3.3V) on will these GDO pins give some output?
If these pins still give output based on registers, I have one more question.. When the chip is switched off and switched on do these registers reset to some value? / save previous configuration?
Thanks for the help in advance...
