Wire library and blocking read/writes

-

hello, there way preform non blocking read/writes on twi? spend long time staring @ twi.c, hoping stick some:

if (a long time has passed) {
 return -1 or equally absurd;
}

flavoured statements somewhere drew blank.

i 'm guessing code expecting respond interrupts somewhere. 'm amazed google doesn't seem find in response (am missing something?), seems me having arduino hang if cable i2c device gets unplugged can rather serious problem lot of applications.

as far can tell arduino twi functions non-blocking. because built application used external i2c eeprom chip , if unplugged eeprom application continued run, returning ones read requests.

lefty


Arduino Forum > Forum 2005-2010 (read only) > Software > Development > Wire library and blocking read/writes


arduino

Comments

Post a Comment

Popular posts from this blog

CAN'T INSTALL MAMBELFISH 1.5 FROM DIRECTORY - Joomla! Forum - community, help and support

-
hi, i want install mambelfish 1.5 component in joomla! 1.0.4 stable [ sundial ] site, reason following error: failed create directory "/home/virtual/site13/fst/var/www/html/components/com_mambelfish/" i new joomla! , still not familiar it. great if build multilingual sites using joomla!. just clarify... media/ writeable administrator/components/ writeable components/ writeable images/stories/ writeable how install component? use  upload package file or use  install directory ? Board index Joomla! Older Version Support Joomla! 1.0 Extensions - 1.0.x Components
Read more

error: expected initializer before 'void'

-
whenever try compile code following error : 'error: expected initializer before 'void'' code: [select] #include <afmotor.h> af_dcmotor motor1(1, motor12_64khz); // create motor #1, 64khz pwm af_dcmotor motor2(2, motor12_64khz); // motor #2 void setup() {  serial.begin(9600);           // set serial library @ 9600 bps  serial.println("motor test!"); } void loop() { go(); backup(); halt(); }   void go() {  serial.println("all motors ahead - fast");    motor1.run(forward);  motor2.run(forward);  motor1.setspeed(255);  motor2.setspeed(255);  return; } void backup() {  serial.println("all motors backward - fast");  motor1.run(backward);  motor2.run(backward);  motor1.setspeed(255);  motor2.setspeed(255);  return; } void halt() {  uint8_t i;  for (i=255; i!=0; i--) ...
Read more

CPU load monitoring using GPIO and leds - Raspberry Pi Forums

-
Image
hello ! wrote today article on blog cpu load monitoring (using gpio , leds) on raspberry's. simple (written in little shell script), think can useful (for people want learn leds stuff on r. pi) there 5 leds turning on , off regarding cpu load: - cpu < 20%: 1 led - cpu < 40%: 2 leds - cpu < 60%: 3 leds - cpu < 80%: 4 leds - cpu < 90%: 5/5 leds - cpu >= 90%: 5 leds flashing here article: written in french, can watch youtube video , download code @ bottom of article. http://www.chteuchteu.com/2012/10/26/ra ... e-au-gpio/ if find errors in code, can post comment on article. ! up code enhancements ? raspberrypi
Read more