Chapter 12 Footstep Detector - Minor Fix for Serial Comm

[TheEJM3]

This isn't really a fix, just an alternative for terminals to read the serial data as ASCII instead of bytes:

Original code:
transmitByte(adcValue - 512 + 127);
transmitByte((lowValue >> 4) - 512 + 127);
transmitByte((highValue >> 4) - 512 + 127);
_delay_ms(CYCLE_DELAY);

Replace with:
printByte(adcValue - 512 + 127);
printString(" - ");
printByte((lowValue >> 4) - 512 + 127);
printString(" - ");
printByte((highValue >> 4) - 512 + 127);
printString("\r\n");
_delay_ms(CYCLE_DELAY);

The serial comm will look like this afterward:
124 - 124 - 125
124 - 124 - 125
124 - 124 - 125
124 - 124 - 125
...

Hope this helps!

-TheEJM3

[TheEJM3]

Forgot to add...

Elliot, great book. I've been learning a ton. I jumped right into learning the Cortex M series and took a step back after finding a lack of structured tutorials. This is a great introduction to embedded system programming in C. Fun and hands on. Thank you.

-TheEJM3

[hexagon5un]

That's awesome -- both the fix and that you've used the book to springboard into the ARM chips. Thanks very much for submitting.