Polling.zip

/********************************************************************** * $Id$ abstract.txt *//** * @file abstract.txt * @brief Example description file * @version 2.0 * @date * @author NXP MCU SW Application Team * * Copyright(C) 2010, NXP Semiconductor * All rights reserved. * *********************************************************************** * Software that is described herein is for illustrative purposes only * which provides customers with programming information regarding the * products. This software is supplied "AS IS" without any warranties. * NXP Semiconductors assumes no responsibility or liability for the * use of the software, conveys no license or title under any patent, * copyright, or mask work right to the product. NXP Semiconductors * reserves the right to make changes in the software without * notification. NXP Semiconductors also make no representation or * warranty that such application will be suitable for the specified * use without further testing or modification. **********************************************************************/ @Example description: Purpose: This example describes how to use ADC conversion in polling mode. Process: Because the potentiometer on different board connect to different ADC channel, so we have to configure correct ADC channel on each board respectively. In this case, - If using MCB1700 board: ADC is configured to convert signal on channel 2 - If using IAR-LPC1768-KS board: ADC is configured to convert signal on channel 5 DMA channel 0 was configured in this example. The ADC conversion rate is 200KHz. A fully A fully accurate conversion requires 65 of these clocks. So ADC clock = 200KHz * 65 = 13MHz. Note that maximum ADC clock input is 13MHz. After start ADC operation, polling "DONE" bit. If "DONE" bit is set, store ADC converted data in "adc_value" and display this data via UART0 and re-start ADC for next conversion. Turn potentiometer to change ADC signal input. @Directory contents: \EWARM: includes EWARM (IAR) project and configuration files \Keil: includes RVMDK (Keil)project and configuration files lpc17xx_libcfg.h: Library configuration file - include needed driver library for this example makefile: Example's makefile (to build with GNU toolchain) adc_polling_test.c: Main program @How to run: Hardware configuration: This example was tested on: Keil MCB1700 with LPC1768 vers.1 These jumpers must be configured as following: - VDDIO: ON - VDDREGS: ON - VBUS: ON - AD0.2: ON - Remain jumpers: OFF IAR LPC1768 KickStart vers.A These jumpers must be configured as following: - PWR_SEL: depend on power source - DBG_EN : ON - Remain jumpers: OFF Serial display configuration: (e.g: TeraTerm, Hyperterminal, Flash Magic...) – 115200bps – 8 data bit – No parity – 1 stop bit – No flow control Running mode: This example can run on RAM/ROM mode. Note: If want to burn hex file to board by using Flash Magic, these jumpers need to be connected: - MCB1700 with LPC1768 ver.1: + RST: ON + ISP: ON - IAR LPC1768 KickStart vers.A: + RST_E: ON + ISP_E: ON (Please reference "LPC1000 Software Development Toolchain" - chapter 4 "Creating and working with LPC1000CMSIS project" for more information) Step to run: - Step 1: Choose correct working board by uncomment correct defined board in adc_polling_test.c file + If using MCB1700 board, uncomment "#define MCB_LPC_1768" + If using IAR-LPC1768-KS board, uncomment "#define MCB_LPC_1768" (Should not uncomment both symbols at the same time) - Step 2: Build example. - Step 3: Burn hex file into board (if run on ROM mode) - Step 4: Connect UART0 on this board to COM port on your computer - Step 5: Configure hardware and serial display as above instruction - Step 6: Run example, turn potetiometer and observe data on serial display (Pls see "LPC17xx Example Description" document - chapter "Examples > ADC > Polling" for more details) @Tip: - Open \EWARM\*.eww project file to run example on IAR - Open \RVMDK\*.uvproj project file to run example on Keil