These are the examples provided for [[/users/frank26080115/libraries/LPC1700CMSIS_Lib/]] Note, the entire "program" is not compilable!
ADC/HardwareTrigger/adc_hardware_trigger_test.c
- Committer:
- frank26080115
- Date:
- 2011-03-20
- Revision:
- 0:bf7b9fba3924
File content as of revision 0:bf7b9fba3924:
/*** * @file adc_hardware_trigger_test.c * @purpose This example describes how to use ADC conversion in * interrupt mode * @version 1.0 * @date 18. June. 2010 * @author NXP MCU SW Application Team *--------------------------------------------------------------------- * 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. **********************************************************************/ #include "lpc17xx_adc.h" #include "lpc17xx_libcfg.h" #include "lpc17xx_pinsel.h" #include "debug_frmwrk.h" /* Example group ----------------------------------------------------------- */ /** @defgroup ADC_HardwareTrigger HardwareTrigger * @ingroup ADC_Examples * @{ */ /************************** PRIVATE DEFINITIONS ***********************/ #define _ADC_INT ADC_ADINTEN2 #define _ADC_CHANNEL ADC_CHANNEL_2 /************************** PRIVATE VARIABLES *************************/ uint8_t menu1[] = "********************************************************************************\n\r" "Hello NXP Semiconductors \n\r" " ADC demo \n\r" "\t - MCU: LPC17xx \n\r" "\t - Core: ARM CORTEX-M3 \n\r" "\t - Communicate via: UART0 - 115200 bps \n\r" " Use ADC with 12-bit resolution rate of 200KHz, read in hardware-triggred mode\n\r" " Press INT0 button to start ADC conversion, ADC interrupt when conversion completed\n\r" " ADC channel value is read back and displayed via UART0\n\r" " Turn the potentiometer to see how ADC value changes\n\r" "********************************************************************************\n\r"; uint32_t adc_value; /************************** PRIVATE FUNCTION *************************/ void ADC_IRQHandler(void); void print_menu(void); /*----------------- INTERRUPT SERVICE ROUTINES --------------------------*/ /*********************************************************************//** * @brief ADC interrupt handler sub-routine * @param[in] None * @return None **********************************************************************/ void ADC_IRQHandler(void) { adc_value = 0; if (ADC_ChannelGetStatus(LPC_ADC,ADC_CHANNEL_2,ADC_DATA_DONE)) { adc_value = ADC_ChannelGetData(LPC_ADC,ADC_CHANNEL_2); NVIC_DisableIRQ(ADC_IRQn); } } /*-------------------------PRIVATE FUNCTIONS------------------------------*/ /*********************************************************************//** * @brief Print menu * @param[in] None * @return None **********************************************************************/ void print_menu(void) { _DBG(menu1); } /*-------------------------MAIN FUNCTION------------------------------*/ /*********************************************************************//** * @brief c_entry: Main ADC program body * @param[in] None * @return int **********************************************************************/ int c_entry(void) { PINSEL_CFG_Type PinCfg; /* Initialize debug via UART0 * 115200bps * 8 data bit * No parity * 1 stop bit * No flow control */ debug_frmwrk_init(); // print welcome screen print_menu(); /* * Init ADC pin connect * AD0.2 on P0.25 */ PinCfg.Funcnum = 1; PinCfg.OpenDrain = 0; PinCfg.Pinmode = 0; PinCfg.Pinnum = 25; PinCfg.Portnum = 0; PINSEL_ConfigPin(&PinCfg); /* * Init P2.10 * */ PinCfg.Funcnum = 1; //EINT0 PinCfg.OpenDrain = 0; PinCfg.Pinmode = 0; PinCfg.Pinnum = 10; PinCfg.Portnum = 2; PINSEL_ConfigPin(&PinCfg); /* Configuration for ADC: * select: ADC channel 2 (if using MCB1700 board) * ADC channel 5 (if using IAR-LPC1768 board) * ADC conversion rate = 200KHz */ ADC_Init(LPC_ADC, 200000); ADC_IntConfig(LPC_ADC,_ADC_INT,ENABLE); ADC_ChannelCmd(LPC_ADC,_ADC_CHANNEL,ENABLE); ADC_EdgeStartConfig(LPC_ADC,ADC_START_ON_FALLING); /* preemption = 1, sub-priority = 1 */ NVIC_SetPriority(ADC_IRQn, ((0x01<<3)|0x01)); while(1) { adc_value = 0; // Start conversion on EINT0 falling edge ADC_StartCmd(LPC_ADC,ADC_START_ON_EINT0); /* Enable ADC in NVIC */ NVIC_EnableIRQ(ADC_IRQn); _DBG("Press INT0 button to start ADC conversion on AD0.2...");_DBG_(""); while(adc_value==0); //Display the result of conversion on the UART0 _DBG("ADC value on channel 2: "); _DBD32(adc_value); _DBG_(""); } ADC_DeInit(LPC_ADC); return (0); } /* Support required entry point for other toolchain */ int main (void) { return c_entry(); } #ifdef DEBUG /******************************************************************************* * @brief Reports the name of the source file and the source line number * where the CHECK_PARAM error has occurred. * @param[in] file Pointer to the source file name * @param[in] line assert_param error line source number * @return None *******************************************************************************/ void check_failed(uint8_t *file, uint32_t line) { /* User can add his own implementation to report the file name and line number, ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */ /* Infinite loop */ while(1); } #endif /* * @} */