DM300019 Microchip Technology, DM300019 Datasheet - Page 32

• Manufacturer Part Number: DM300019
• Description: BOARD DEMO DSPICDEM 80L STARTER
• Manufacturer: Microchip Technology
• Type: MCUr

Specifications of DM300019

• Contents: Board, CD, Sample Part
• Processor To Be Evaluated: dsPIC30F and dsPIC33F
• Interface Type: RS-232
• Silicon Manufacturer: Microchip
• Silicon Core Number: DsPIC30F6014A, DsPIC33FJ256GP710
• Silicon Family Name: DsPIC30F And DsPIC33F
• Kit Contents: Development Board And Docs On CD
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With/related Products: dsPIC30F, dsPIC33F
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

dsPICDEM™ 80-Pin Starter Development Board User’s Guide
DS51584B-page 28
3.4.2
This program consists of two subroutines which (1) perform the A/D conversion and (2)
transmit the converted value over an RS-232 serial connection (see Figure 3-2). The
A/D conversion routine samples the analog output of Potentiometer RB2. The transmit
routine converts the 12-bit binary value from ADC12 to a three-digit HEX code,
converts the HEX code to an ASCII character and loads the ASCII value into the
transmission buffer of UART1. UART1 transmits each ASCII character with a CR and
LF to delimit each sample as a separate line on the receiving terminal.
FIGURE 3-2:
Analog-to-Digital Conversion
Convert 12-bit Binary
ADC Complete?
Generate ASCII
Generate ASCII
Digit 3 to ASCII
Digit 2 to ASCII
Digit 1 to ASCII
Delay 10 msec
to 3-digit HEX
Convert HEX
Convert HEX
Convert HEX
INIT ADC12
Conversion
INIT UART
Start A/D
START
CR
LF
Yes
ANALOG-TO-DIGITAL CONVERSION FLOW DIAGRAM
No
Buffer Full?
Buffer Full?
Buffer Full?
Buffer Full?
Buffer Full?
Yes
Yes
Yes
Yes
Yes
No
No
No
No
No
Load Digit 3 into
Load Digit 2 into
Load Digit 1 into
Transmit Buffer
Transmit Buffer
Transmit Buffer
Transmit Buffer
Load Transmit
Load CR into
Buffer
© 2006 Microchip Technology Inc.