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16-bit Counter Card for SR9000
"Smartstar" System (SSCTC-HS)

Industrial Automation Systems

The SSCTC board has 8 TTL input counters, which will count up to 16 bits at 15Khz.

Each input will have a 16 bit( 2 bytes), software reset able counter. We will include a pic.lib library file for you to use in communicating with the card. The library instructions read as follows:

• int read_counter( int ctr, unsigned long *count); // Return the counter value.
• int set_counter( int ctr, unsigned long count); // Set counter to a specified value.
• int enable_counter( int ctr);
• int disable_counter( int ctr);
• int read_adc( int ad_chan); // return the value of the 0-5 V analog input.

The card also contains a TTL-RS232 converter for use as an additional serial port.

Custom programming for the PIC is done via the 26 pin connector shown.

Currently we have libraries for the PIC, in Smartstar systems, to perform the following functions:
1) A/D conversion.
2) PWM output at 100 Hz 10% to 90% duty cycle for automotive applications.
3) PWM output at 1.2Khz for 0-5 V analog output.
4) Frequency measurement of flow rates.
5) 5 Wire Touch Overlay control input for an LCD display.

PIC software library functions include the following instructions:
1) R/W an address in PIC RAM. ( This also allows setting control registers)
2) R/W an I/O bit on the PIC chip. ( This also allows setting control registers)
3) R/W PWM duty cycle.
4) Read Touch overlay key hit.
5) Read frequency of the counter input.

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