Thread: converting a string into binary for data transfer

This can easily be generalized to an entire string:

Code:

uint8_t text[] = "Hello";
uint8_t i;
uint8_t *p = &text[0];

/* Transmit the first character. */
for (i = 0; i < 8; ++i)
{
    /* Wait for next edge */
    if ((uint8_t)(1 << i) & *p)
    {
        OUT_PORT |= 1 << PIN_NUMBER;
    }
    else
    {
        OUT_PORT &= ~(1 << PIN_NUMBER);
    }
}

You can replace the for loop with a static counter if you need to do the sending inside an ISR.