function io_check_hardware($in1, $in2, $in3, $in4, $out1, $out2)
{
# set all pins as inputs on the input boards
$error = 0;
if ($i1 = I2C_Write($in1, 255) < 0) {
$error++;
}
//chip is bidirectional, set outputs to 1 to read as input
if ($i2 = I2C_Write($in2, 255) < 0) {
$error++;
}
//chip is bidirectional, set outputs to 1 to read as input
if ($i3 = I2C_Write($in3, 255) < 0) {
$error++;
}
//chip is bidirectional, set outputs to 1 to read as input
if ($i4 = I2C_Write($in4, 255) < 0) {
$error++;
}
//chip is bidirectional, set outputs to 1 to read as input
if ($i1) {
logformat(sprintf("Opto input board 1 with address: 0x%X is missing or not functioning!\n", PCF8574_ADDR1), 1);
}
if ($i2) {
logformat(sprintf("Opto input board 2 with address: 0x%X is missing or not functioning!\n", PCF8574_ADDR2), 1);
}
if ($i3) {
logformat(sprintf("Opto input board 3 with address: 0x%X is missing or not functioning!\n", PCF8574_ADDR3), 1);
}
if ($i4) {
logformat(sprintf("Opto input board 4 with address: 0x%X is missing or not functioning!\n", PCF8574_ADDR4), 1);
}
if ($error) {
return $error;
}
#set all pins as outputs on the output boards and set all outputs high
if ($o1 = I2C_WriteReg16($out1, PCA9555_CONFPORT0, 0) < 0) {
$error++;
}
//sends to CONFPORT0 and 1
if ($o2 = I2C_WriteReg16($out2, PCA9555_CONFPORT0, 0) < 0) {
$error++;
}
//sends to CONFPORT0 and 1
if ($o1) {
logformat(sprintf("PCA9555 based output board 1 with address: 0x%X is missing or not functioning!\n", PCA9555_ADDR1), 1);
}
if ($o2) {
logformat(sprintf("PCA9555 based output board 2 with address: 0x%X is missing or not functioning!\n", PCA9555_ADDR2), 1);
}
if ($error) {
return $error;
}
return 0;
}
$in1 = I2C_Setup(PCF8574_ADDR1);
$in2 = I2C_Setup(PCF8574_ADDR2);
$in3 = I2C_Setup(PCF8574_ADDR3);
$in4 = I2C_Setup(PCF8574_ADDR4);
$out1 = I2C_Setup(PCA9555_ADDR1);
$out2 = I2C_Setup(PCA9555_ADDR2);
// set all pins as inputs on the input boards
// set all pins as outputs on the output boards
$error = io_check_hardware($in1, $in2, $in3, $in4, $out1, $out2);
if ($error) {
exit(1);
}
// and set all outputs high
$o = I2C_WriteReg16($out1, PCA9555_OUTPORT0, 65535);
//sends to OUTPORT0 and 1
$o = I2C_WriteReg16($out2, PCA9555_OUTPORT0, 65535);
//sends to OUTPORT0 and 1
$pc_up = array_fill(0, IN_PINS, 0);
$pc_dn = array_fill(0, IN_PINS, 0);
$out_states = '';
//these will be 64 2 digit hex items
$in_states = '';
$in_programs = '';
$in_levels = '';
$inames = array();
//input names id=>name
$onames = array();
//output names id=>name
$itypes = array();
//input switch type
$otypes = array();
function set_outputs(&$out_states)
{
global $out1, $out2;
$o = '';
for ($i = 0; $i < 64; $i++) {
$o .= hexdec(substr($out_states, $i * 2, 2)) ? '1' : '0';
}
$r = I2C_WriteReg16($out1, PCA9555_OUTPORT0, bindec(substr($o, 0, 16)));
//sends to OUTPORT0 and 1
$r = I2C_WriteReg16($out2, PCA9555_OUTPORT0, bindec(substr($o, 16, 16)));
//sends to OUTPORT0 and 1
}
