NXP's driver library for LPC17xx, ported to mbed's online compiler. Not tested! I had to fix a lot of warings and found a couple of pretty obvious bugs, so the chances are there are more. Original: http://ics.nxp.com/support/documents/microcontrollers/zip/lpc17xx.cmsis.driver.library.zip
Diff: source/lpc17xx_adc.c
- Revision:
- 0:1063a091a062
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/source/lpc17xx_adc.c Wed Feb 17 16:22:39 2010 +0000 @@ -0,0 +1,335 @@ +/** + * @file : lpc17xx_adc.c + * @brief : Contains all functions support for ADC firmware library on LPC17xx + * @version : 1.0 + * @date : 3. April. 2009 + * @author : NgaDinh + ************************************************************************** + * 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. + **********************************************************************/ + +/* Peripheral group ----------------------------------------------------------- */ +/** @addtogroup ADC + * @{ + */ + +/* Includes ------------------------------------------------------------------- */ +#include "lpc17xx_adc.h" +#include "lpc17xx_clkpwr.h" + +/* If this source file built with example, the LPC17xx FW library configuration + * file in each example directory ("lpc17xx_libcfg.h") must be included, + * otherwise the default FW library configuration file must be included instead + */ +#ifdef __BUILD_WITH_EXAMPLE__ +#include "lpc17xx_libcfg.h" +#else +#include "lpc17xx_libcfg_default.h" +#endif /* __BUILD_WITH_EXAMPLE__ */ + + +#ifdef _ADC + +/* Public Functions ----------------------------------------------------------- */ +/** @addtogroup ADC_Public_Functions + * @{ + */ + +/*********************************************************************//** + * @brief Initial for ADC + * - Set bit PCADC + * - Set clock for ADC + * - Set Clock Frequency + * + * @param[in] ADCx pointer to LPC_ADC_TypeDef + * @param[in] ConvFreq Clock frequency + * @return None + **********************************************************************/ +void ADC_Init(LPC_ADC_TypeDef *ADCx, uint32_t ConvFreq) + +{ + uint32_t temp, tmp; + + CHECK_PARAM(PARAM_ADCx(ADCx)); + CHECK_PARAM(PARAM_ADC_FREQUENCY(ConvFreq)); + + // Turn on power and clock + CLKPWR_ConfigPPWR (CLKPWR_PCONP_PCAD, ENABLE); + // Set clock divider for ADC to 4 from CCLK as default + // CLKPWR_SetPCLKDiv(CLKPWR_PCLKSEL_ADC,CLKPWR_PCLKSEL_CCLK_DIV_4); + + ADCx->ADCR = 0; + + //Enable PDN bit + tmp = ADC_CR_PDN; + // Set clock frequency + temp = CLKPWR_GetPCLK(CLKPWR_PCLKSEL_ADC) ; + temp = (temp /ConvFreq) - 1; + tmp |= ADC_CR_CLKDIV(temp); + + ADCx->ADCR = tmp; +} + + +/*********************************************************************//** +* @brief Close ADC +* @param[in] ADCx pointer to ADC +* @return None +**********************************************************************/ +void ADC_DeInit(LPC_ADC_TypeDef *ADCx) +{ + CHECK_PARAM(PARAM_ADCx(ADCx)); + + // Clear PDN bit + ADCx->ADCR &= ~ADC_CR_PDN; + // Turn on power and clock + CLKPWR_ConfigPPWR (CLKPWR_PCONP_PCAD, DISABLE); +} + + +/*********************************************************************//** +* @brief Get Result conversion from A/D data register +* @param[in] channel number which want to read back the result +* @return Result of conversion +*********************************************************************/ +uint32_t ADC_GetData(uint32_t channel) +{ + uint32_t adc_value; + + CHECK_PARAM(PARAM_ADC_CHANNEL_SELECTION(channel)); + + adc_value = *(uint32_t *)((&LPC_ADC->ADDR0) + channel); + return ADC_GDR_RESULT(adc_value); +} + +/*********************************************************************//** +* @brief Set start mode for ADC +* @param[in] ADCx pointer to LPC_ADC_TypeDef +* @param[in] start_mode Start mode choose one of modes in +* 'ADC_START_OPT' enumeration type definition +* @return None +*********************************************************************/ +void ADC_StartCmd(LPC_ADC_TypeDef *ADCx, uint8_t start_mode) +{ + CHECK_PARAM(PARAM_ADCx(ADCx)); + CHECK_PARAM(PARAM_ADC_START_OPT(start_mode)); + + ADCx->ADCR &= ~ADC_CR_START_MASK; + ADCx->ADCR |=ADC_CR_START_MODE_SEL((uint32_t)start_mode); +} + + +/*********************************************************************//** +* @brief ADC Burst mode setting +* +* @param[in] ADCx pointer to ADC +* @param[in] NewState +* - 1: Set Burst mode +* - 0: reset Burst mode +* @return None +**********************************************************************/ +void ADC_BurstCmd(LPC_ADC_TypeDef *ADCx, FunctionalState NewState) +{ + CHECK_PARAM(PARAM_ADCx(ADCx)); + + ADCx->ADCR &= ~ADC_CR_BURST; + if (NewState){ + ADCx->ADCR |= ADC_CR_BURST; + } + +} + +/*********************************************************************//** +* @brief Set AD conversion in power mode +* +* @param[in] ADCx pointer to ADC +* @param[in] NewState +* - 1: AD converter is optional +* - 0: AD Converter is in power down mode +* @return None +**********************************************************************/ +void ADC_PowerdownCmd(LPC_ADC_TypeDef *ADCx, FunctionalState NewState) +{ + CHECK_PARAM(PARAM_ADCx(ADCx)); + + ADCx->ADCR &= ~ADC_CR_PDN; + if (NewState){ + ADCx->ADCR |= ADC_CR_PDN; + } +} + +/*********************************************************************//** +* @brief Set Edge start configuration +* +* @param[in] ADCx pointer to ADC +* @param[in] EdgeOption is ADC_START_ON_RISING and ADC_START_ON_FALLING +* 0:ADC_START_ON_RISING +* 1:ADC_START_ON_FALLING +* +* @return None +**********************************************************************/ +void ADC_EdgeStartConfig(LPC_ADC_TypeDef *ADCx, uint8_t EdgeOption) +{ + CHECK_PARAM(PARAM_ADCx(ADCx)); + CHECK_PARAM(PARAM_ADC_START_ON_EDGE_OPT(EdgeOption)); + + ADCx->ADCR &= ~ADC_CR_EDGE; + if (EdgeOption){ + ADCx->ADCR |= ADC_CR_EDGE; + } +} + +/*********************************************************************//** +* @brief ADC interrupt configuration +* @param[in] ADCx pointer to ADC +* @param[in] IntType +* @param[in] NewState: +* - SET : enable ADC interrupt +* - RESET: disable ADC interrupt +* +* @return None +**********************************************************************/ +void ADC_IntConfig (LPC_ADC_TypeDef *ADCx, ADC_TYPE_INT_OPT IntType, FunctionalState NewState) +{ + CHECK_PARAM(PARAM_ADCx(ADCx)); + CHECK_PARAM(PARAM_ADC_TYPE_INT_OPT(IntType)); + + ADCx->ADINTEN &= ~ADC_INTEN_CH(IntType); + if (NewState){ + ADCx->ADINTEN |= ADC_INTEN_CH(IntType); + } +} + +/*********************************************************************//** +* @brief Enable/Disable ADC channel number +* @param[in] ADCx pointer to ADC +* @param[in] Channel channel number +* @param[in] NewState Enable or Disable +* +* @return None +**********************************************************************/ +void ADC_ChannelCmd (LPC_ADC_TypeDef *ADCx, uint8_t Channel, FunctionalState NewState) +{ + CHECK_PARAM(PARAM_ADCx(ADCx)); + CHECK_PARAM(PARAM_ADC_CHANNEL_SELECTION(Channel)); + + if (NewState == ENABLE) { + ADCx->ADCR |= ADC_CR_CH_SEL(Channel); + } else { + ADCx->ADCR &= ~ADC_CR_CH_SEL(Channel); + } +} + +/*********************************************************************//** +* @brief Get ADC result +* @param[in] ADCx pointer to ADC +* @param[in] channel channel number +* @return Data conversion +**********************************************************************/ +uint16_t ADC_ChannelGetData(LPC_ADC_TypeDef *ADCx, uint8_t channel) +{ + uint32_t adc_value; + + CHECK_PARAM(PARAM_ADCx(ADCx)); + CHECK_PARAM(PARAM_ADC_CHANNEL_SELECTION(channel)); + + adc_value = *(uint32_t *) ((&ADCx->ADDR0) + channel); + return ADC_DR_RESULT(adc_value); +} + +/*********************************************************************//** +* @brief Get ADC Chanel status from ADC data register +* @param[in] ADCx pointer to ADC +* @param[in] channel channel number +* @param[in] StatusType +* 0:Burst status +* 1:Done status +* @return SET / RESET +**********************************************************************/ +FlagStatus ADC_ChannelGetStatus(LPC_ADC_TypeDef *ADCx, uint8_t channel, uint32_t StatusType) +{ + uint32_t temp; + + CHECK_PARAM(PARAM_ADCx(ADCx)); + CHECK_PARAM(PARAM_ADC_CHANNEL_SELECTION(channel)); + CHECK_PARAM(PARAM_ADC_DATA_STATUS(StatusType)); + + temp = *(uint32_t *) ((&ADCx->ADDR0) + channel); + if (StatusType) { + temp &= ADC_DR_DONE_FLAG; + }else{ + temp &= ADC_DR_OVERRUN_FLAG; + } + if (temp) { + return SET; + } else { + return RESET; + } + +} + +/*********************************************************************//** +* @brief Get ADC Data from AD Global register +* @param[in] ADCx pointer to ADC +* @param[in] channel channel number +* @return Result of conversion +**********************************************************************/ +uint16_t ADC_GlobalGetData(LPC_ADC_TypeDef *ADCx, uint8_t channel) +{ + CHECK_PARAM(PARAM_ADCx(ADCx)); + CHECK_PARAM(PARAM_ADC_CHANNEL_SELECTION(channel)); + + //ADCx->ADGDR &= ~ADC_GDR_CH_MASK; + //ADCx->ADGDR |= ADC_GDR_CH(channel); + return (uint16_t)(ADC_GDR_RESULT(ADCx->ADGDR)); +} + +/*********************************************************************//** +* @brief Get ADC Chanel status from AD global data register +* @param[in] ADCx pointer to ADC +* @param[in] StatusType +* 0:Burst status +* 1:Done status +* @return SET / RESET +**********************************************************************/ +FlagStatus ADC_GlobalGetStatus(LPC_ADC_TypeDef *ADCx, uint32_t StatusType) +{ + uint32_t temp; + + CHECK_PARAM(PARAM_ADCx(ADCx)); + CHECK_PARAM(PARAM_ADC_DATA_STATUS(StatusType)); + + temp = ADCx->ADGDR; + if (StatusType){ + temp &= ADC_DR_DONE_FLAG; + }else{ + temp &= ADC_DR_OVERRUN_FLAG; + } + if (temp){ + return SET; + }else{ + return RESET; + } +} + +/** + * @} + */ + +#endif /* _ADC */ + +/** + * @} + */ + +/* --------------------------------- End Of File ------------------------------ */ +