imraa_concept

gistfile1.txt

/etc/imraa.conf

Defines how pins will be used:

{
  "lockfile-location": "xxx",
  "Platform" :[
    {"id":"512", "type":"GENERIC_FIRMATA", "flash":"/var/cache/101/firmata.img", "usbserial": "auto"}
  ],
  "IO" :[
    {"type":"gpio", "index":0, "raw": false, "label": "none"},
    {"type":"i2c", "index":0, "raw": false, "label": "i2c-0"}
  ]
}

1. runs mraa_init(), initilise platform, if subplatforms set to flash then do so
2. write pinmuxing to set IO into mode via mraa:XXX calls and then setting ownership to 'false' so close/cleanup never happens
3. writes json lockfile in /tmp/ with subplatform ids
{
  "Platform" :[
    {"id": "0", "type":"NULL_PLATFORM"},
    {"id":"512", "type":"GENERIC_FIRMATA", "uart": "/dev/ttyACM0"}
}
4. when mraa_init() runs check for lockfile, if lockfile read subplatform info