Diff: lpc17xx_adc.c

Revision:

0:84d7747641aa

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/lpc17xx_adc.c	Sun Mar 20 18:45:15 2011 +0000
@@ -0,0 +1,340 @@
+/***********************************************************************//**
+ * @file        lpc17xx_adc.c
+ * @brief        Contains all functions support for ADC firmware library on LPC17xx
+ * @version        3.0
+ * @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.
+ **********************************************************************/
+
+/* 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, should be: LPC_ADC
+ * @param[in]    rate ADC conversion rate, should be <=200KHz
+ * @return         None
+ **********************************************************************/
+void ADC_Init(LPC_ADC_TypeDef *ADCx, uint32_t rate)
+{
+    uint32_t temp, tmp;
+
+    CHECK_PARAM(PARAM_ADCx(ADCx));
+    CHECK_PARAM(PARAM_ADC_RATE(rate));
+
+    // Turn on power and clock
+    CLKPWR_ConfigPPWR (CLKPWR_PCONP_PCAD, ENABLE);
+
+    ADCx->ADCR = 0;
+
+    //Enable PDN bit
+    tmp = ADC_CR_PDN;
+    // Set clock frequency
+    temp = CLKPWR_GetPCLK(CLKPWR_PCLKSEL_ADC);
+    /* The APB clock (PCLK_ADC0) is divided by (CLKDIV+1) to produce the clock for
+     * A/D converter, which should be less than or equal to 13MHz.
+     * A fully conversion requires 65 of these clocks.
+     * ADC clock = PCLK_ADC0 / (CLKDIV + 1);
+     * ADC rate = ADC clock / 65;
+     */
+    temp = (temp /(rate * 65)) - 1;
+    tmp |=  ADC_CR_CLKDIV(temp);
+
+    ADCx->ADCR = tmp;
+}
+
+
+/*********************************************************************//**
+* @brief         Close ADC
+* @param[in]    ADCx pointer to LPC_ADC_TypeDef, should be: LPC_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, should be: LPC_ADC
+* @param[in]    start_mode Start mode choose one of modes in
+*                 'ADC_START_OPT' enumeration type definition, should be:
+*                 - ADC_START_CONTINUOUS
+*                 - ADC_START_NOW
+*                 - ADC_START_ON_EINT0
+*                 - ADC_START_ON_CAP01
+*                - ADC_START_ON_MAT01
+*                - ADC_START_ON_MAT03
+*                - ADC_START_ON_MAT10
+*                - ADC_START_ON_MAT11
+* @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 LPC_ADC_TypeDef, should be: LPC_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 LPC_ADC_TypeDef, should be: LPC_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 LPC_ADC_TypeDef, should be: LPC_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 LPC_ADC_TypeDef, should be: LPC_ADC
+* @param[in]    IntType: type of interrupt, should be:
+*                 - ADC_ADINTEN0: Interrupt channel 0
+*                 - ADC_ADINTEN1: Interrupt channel 1
+*                 ...
+*                 - ADC_ADINTEN7: Interrupt channel 7
+*                 - ADC_ADGINTEN: Individual channel/global flag done generate an interrupt
+* @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 LPC_ADC_TypeDef, should be: LPC_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 LPC_ADC_TypeDef, should be: LPC_ADC
+* @param[in]    channel: channel number, should be 0...7
+* @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 LPC_ADC_TypeDef, should be: LPC_ADC
+* @param[in]    channel: channel number, should be 0..7
+* @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 LPC_ADC_TypeDef, should be: LPC_ADC
+* @return         Result of conversion
+**********************************************************************/
+uint32_t ADC_GlobalGetData(LPC_ADC_TypeDef *ADCx)
+{
+    CHECK_PARAM(PARAM_ADCx(ADCx));
+
+    return ((uint32_t)(ADCx->ADGDR));
+}
+
+/*********************************************************************//**
+* @brief         Get ADC Chanel status from AD global data register
+* @param[in]    ADCx pointer to LPC_ADC_TypeDef, should be: LPC_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 ------------------------------ */
+