Bit banging RF remote

[Marco]

I am a starting user of Flowcode. So maybe my question is not as hard to answer but it is for me.
My goal is to simulate a train of bits like they are produces by a RF remote controll.

I have read a lot and I think I have to bit bang these pulses but maybe there is a better solution. I have to transmit 128 bits at a speed of 1500bit/s

Does anyone have a good example in Flowcode or C code I can use in FLowcode?

[Benj]

Hello

Get a PICmicro with a UART and use the RS232 component. Much easier.

[Sean]

You can use a Flowcode C Code block to gain access to the C function 'delay_10us()'.

delay_10us(67); will give you a 1500bit/s delay with approximately 0.5% accuracy. A 16-byte array (declared as a Flowcode string) can by used to store the 128-bits of data.

The delay function can be used to control the cycle time of a While() loop.

You can use counter variables within the loop to locate the bit required for transmission in the data array on each cycle of the loop.

The data in individual bytes can be shifted using the << (shift left) or >> (shift right) operator:

data[0] = data[0] << 1 will shift the contents of data[0] one place to the left

Individual bits can be read from a byte using the AND operator.

Example:
tx_val = data[0] AND 64 will copy bit 6 of data[0] to tx_val.
Note: The result of this operation would be 0 or 64, the bit value should be be treated as zero = 0, non-zero = 1

Greater timing accuracy would probably require the use of hardware timers and interrupts.