PHP code example of php-io-extensions / ftdi

    
        
<?php
require_once('vendor/autoload.php');

/* Start to develop here. Best regards https://php-download.com/ */

    

php-io-extensions / ftdi example snippets

use Ftdi\FtdiProductId;
use Ftdi\FtdiVendorId;

$ftdi = ftdi_new() ?? throw new RuntimeException('ftdi_new() failed');

$found = ftdi_usb_find_all($ftdi, FtdiVendorId::FTDI->value, FtdiProductId::FT232H->value);

foreach ($found['devices'] as $device) {
    $strings = ftdi_usb_get_strings($ftdi, $device);
    printf("%s, serial %s\n", $strings['description'], $strings['serial']);
}

$ftdi = ftdi_new() ?? throw new RuntimeException('ftdi_new() failed');

if (ftdi_usb_open($ftdi, FtdiVendorId::FTDI->value, FtdiProductId::FT232H->value) < 0) {
    throw new RuntimeException(ftdi_get_error_string($ftdi));
}

ftdi_usb_reset($ftdi);
ftdi_set_bitmode($ftdi, 0x00, BITMODE_RESET);
ftdi_set_bitmode($ftdi, 0x00, BITMODE_MPSSE);
ftdi_tcio_flush($ftdi);

// SEND_IMMEDIATE makes the chip answer now instead of when its buffer fills.
ftdi_write_data($ftdi, chr(GET_BITS_LOW) . chr(SEND_IMMEDIATE), 2);

$reply = '';
while (strlen($reply) < 1) {
    $chunk = ftdi_read_data($ftdi, 1);      // "" until the answer arrives
    if ($chunk === false) {
        throw new RuntimeException(ftdi_get_error_string($ftdi));
    }
    $reply .= $chunk;
}
printf("ADBUS 0b%08b\n", ord($reply));

$tx = ftdi_write_data_submit($ftdi, chr(GET_BITS_LOW) . chr(SEND_IMMEDIATE), 2)
    ?? throw new RuntimeException(ftdi_get_error_string($ftdi));
$rx = ftdi_read_data_submit($ftdi, 1)
    ?? throw new RuntimeException(ftdi_get_error_string($ftdi));

while (! ftdi_transfer_completed($rx)) {
    ftdi_handle_events_timeout($ftdi, 10_000);      // microseconds
}

$written = ftdi_transfer_data_done($tx);            // 2
$pins = ftdi_transfer_read_done($rx);               // the byte read

ftdi_usb_close($ftdi);
ftdi_free($ftdi);

bash
./install-macos.sh                     # Homebrew [email protected] and [email protected]
./install-debian-trixie.sh             # the php on PATH: Debian trixie, Raspberry Pi OS, Ubuntu 24.04+
./install-macos.sh /path/to/bin/php    # either script takes specific PHP binaries

bash
phpize && ./configure --enable-ftdi && make && make install
echo 'extension=ftdi' > "$(php -r 'echo PHP_CONFIG_FILE_SCAN_DIR;')/30-ftdi.ini"