move lpc_chip_13xx files
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hathach
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/*
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* @brief LPC13xx A/D conversion driver
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*
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* @note
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* Copyright(C) NXP Semiconductors, 2012
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* All rights reserved.
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*
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* @par
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* Software that is described herein is for illustrative purposes only
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* which provides customers with programming information regarding the
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* LPC products. This software is supplied "AS IS" without any warranties of
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* any kind, and NXP Semiconductors and its licensor disclaim any and
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* all warranties, express or implied, including all implied warranties of
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* merchantability, fitness for a particular purpose and non-infringement of
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* intellectual property rights. NXP Semiconductors assumes no responsibility
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* or liability for the use of the software, conveys no license or rights under any
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* patent, copyright, mask work right, or any other intellectual property rights in
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* or to any products. NXP Semiconductors reserves the right to make changes
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* in the software without notification. NXP Semiconductors also makes no
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* representation or warranty that such application will be suitable for the
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* specified use without further testing or modification.
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*
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* @par
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* Permission to use, copy, modify, and distribute this software and its
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* documentation is hereby granted, under NXP Semiconductors' and its
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* licensor's relevant copyrights in the software, without fee, provided that it
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* is used in conjunction with NXP Semiconductors microcontrollers. This
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* copyright, permission, and disclaimer notice must appear in all copies of
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* this code.
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*/
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#include "chip.h"
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/*****************************************************************************
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* Private types/enumerations/variables
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****************************************************************************/
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/*****************************************************************************
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* Public types/enumerations/variables
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****************************************************************************/
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/*****************************************************************************
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* Private functions
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****************************************************************************/
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/* Get the number of clock for a full conversion */
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STATIC INLINE uint8_t getFullConvClk(void)
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{
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#if defined(CHIP_LPC1347)
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return 31;
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#else
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return 11;
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#endif
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}
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/* Get divider value */
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STATIC uint8_t getClkDiv(LPC_ADC_T *pADC, bool burstMode, uint32_t adcRate, uint8_t clks)
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{
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uint32_t adcBlockFreq;
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uint32_t fullAdcRate;
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uint8_t div;
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/* The APB clock (PCLK_ADC0) is divided by (CLKDIV+1) to produce the clock for
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A/D converter, which should be less than or equal to 4.5MHz.
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A fully conversion requires (bits_accuracy+1) of these clocks.
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ADC Clock = PCLK_ADC0 / (CLKDIV + 1);
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ADC rate = ADC clock / (the number of clocks required for each conversion);
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*/
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adcBlockFreq = Chip_Clock_GetSystemClockRate();
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#if defined(ADC_ACC_12BITS)
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fullAdcRate = adcRate * getFullConvClk();
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if (clks == ADC_10BITS) {
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fullAdcRate /= 2;
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}
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#else
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if (burstMode) {
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fullAdcRate = adcRate * clks;
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}
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else {
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fullAdcRate = adcRate * getFullConvClk();
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}
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#endif
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/* Get the round value by fomular: (2*A + B)/(2*B) */
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div = ((adcBlockFreq * 2 + fullAdcRate) / (fullAdcRate * 2)) - 1;
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return div;
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}
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/* Set start mode for ADC */
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void setStartMode(LPC_ADC_T *pADC, uint8_t start_mode)
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{
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uint32_t temp;
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temp = pADC->CR & (~ADC_CR_START_MASK);
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pADC->CR = temp | (ADC_CR_START_MODE_SEL((uint32_t) start_mode));
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}
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/* Get the ADC value */
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Status readAdcVal(LPC_ADC_T *pADC, uint8_t channel, uint16_t *data)
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{
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uint32_t temp;
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temp = pADC->DR[channel];
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if (!ADC_DR_DONE(temp)) {
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return ERROR;
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}
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/* if(ADC_DR_OVERRUN(temp) && (pADC->CR & ADC_CR_BURST)) */
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/* return ERROR; */
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*data = (uint16_t) ADC_DR_RESULT(temp);
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return SUCCESS;
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}
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/*****************************************************************************
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* Public functions
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****************************************************************************/
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/* Initialize the ADC peripheral and the ADC setup structure to default value */
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void Chip_ADC_Init(LPC_ADC_T *pADC, ADC_CLOCK_SETUP_T *ADCSetup)
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{
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uint8_t div;
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uint32_t cr = 0;
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uint32_t clk;
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/* Power up ADC */
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Chip_SYSCTL_PowerUp(SYSCTL_POWERDOWN_ADC_PD);
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/* Enable ADC clock */
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Chip_Clock_EnablePeriphClock(SYSCTL_CLOCK_ADC);
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#if defined(ADC_TRIM_SUPPORT)
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pADC->ADTRM = 0xF00;
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#endif
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pADC->INTEN = 0; /* Disable all interrupts */
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#if defined(CHIP_LPC1347)
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cr |= ADC_CR_LPWRMODE;
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#else
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cr |= ADC_CR_PDN;
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#endif
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ADCSetup->adcRate = ADC_MAX_SAMPLE_RATE;
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#if defined(CHIP_LPC1347)
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ADCSetup->bitsAccuracy = ADC_12BITS;
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clk = ADC_12BITS;
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#else
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ADCSetup->bitsAccuracy = ADC_10BITS;
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clk = 11;
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#endif
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ADCSetup->burstMode = false;
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div = getClkDiv(pADC, false, ADCSetup->adcRate, clk);
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cr |= ADC_CR_CLKDIV(div);
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#if !defined(ADC_ACC_12BITS)
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cr |= ADC_CR_BITACC(ADCSetup->bitsAccuracy);
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#endif /*defined(ADC_ACC_12BITS)*/
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pADC->CR = cr;
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}
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/* Shutdown ADC */
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void Chip_ADC_DeInit(LPC_ADC_T *pADC)
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{
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pADC->INTEN = 0x00000100;
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pADC->CR = 0;
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Chip_Clock_DisablePeriphClock(SYSCTL_CLOCK_ADC);
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Chip_SYSCTL_PowerDown(SYSCTL_POWERDOWN_ADC_PD);
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}
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/* Get the ADC value */
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Status Chip_ADC_ReadValue(LPC_ADC_T *pADC, uint8_t channel, uint16_t *data)
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{
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return readAdcVal(pADC, channel, data);
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}
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/* Get ADC Channel status from ADC data register */
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FlagStatus Chip_ADC_ReadStatus(LPC_ADC_T *pADC, uint8_t channel, uint32_t StatusType)
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{
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switch (StatusType) {
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case ADC_DR_DONE_STAT:
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return (pADC->STAT & (1UL << channel)) ? SET : RESET;
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case ADC_DR_OVERRUN_STAT:
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channel += 8;
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return (pADC->STAT & (1UL << channel)) ? SET : RESET;
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case ADC_DR_ADINT_STAT:
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return pADC->STAT >> 16 ? SET : RESET;
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default:
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break;
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}
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return RESET;
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}
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/* Enable/Disable interrupt for ADC channel */
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void Chip_ADC_Int_SetChannelCmd(LPC_ADC_T *pADC, uint8_t channel, FunctionalState NewState)
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{
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if (NewState == ENABLE) {
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pADC->INTEN |= (1UL << channel);
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}
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else {
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pADC->INTEN &= (~(1UL << channel));
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}
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}
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/* Select the mode starting the AD conversion */
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void Chip_ADC_SetStartMode(LPC_ADC_T *pADC, ADC_START_MODE_T mode, ADC_EDGE_CFG_T EdgeOption)
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{
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if ((mode != ADC_START_NOW) && (mode != ADC_NO_START)) {
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if (EdgeOption) {
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pADC->CR |= ADC_CR_EDGE;
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}
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else {
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pADC->CR &= ~ADC_CR_EDGE;
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}
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}
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setStartMode(pADC, (uint8_t) mode);
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}
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/* Set the ADC Sample rate */
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void Chip_ADC_SetSampleRate(LPC_ADC_T *pADC, ADC_CLOCK_SETUP_T *ADCSetup, uint32_t rate)
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{
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uint8_t div;
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uint32_t cr;
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cr = pADC->CR & (~ADC_SAMPLE_RATE_CONFIG_MASK);
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ADCSetup->adcRate = rate;
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#if defined(CHIP_LPC1347)
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div = getClkDiv(pADC, ADCSetup->burstMode, rate, ADCSetup->bitsAccuracy);
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if (ADCSetup->bitsAccuracy == ADC_10BITS) {
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cr |= ADC_CR_MODE10BIT;
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}
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#else
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div = getClkDiv(pADC, ADCSetup->burstMode, rate, (11 - ADCSetup->bitsAccuracy));
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#endif
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cr |= ADC_CR_CLKDIV(div);
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#if !defined(ADC_ACC_12BITS)
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cr |= ADC_CR_BITACC(ADCSetup->bitsAccuracy);
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#endif /*defined(ADC_ACC_12BITS)*/
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pADC->CR = cr;
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}
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/* Set the ADC accuracy bits */
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void Chip_ADC_SetResolution(LPC_ADC_T *pADC, ADC_CLOCK_SETUP_T *ADCSetup, ADC_RESOLUTION_T resolution)
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{
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ADCSetup->bitsAccuracy = resolution;
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Chip_ADC_SetSampleRate(pADC, ADCSetup, ADCSetup->adcRate);
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}
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/* Enable or disable the ADC channel on ADC peripheral */
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void Chip_ADC_EnableChannel(LPC_ADC_T *pADC, ADC_CHANNEL_T channel, FunctionalState NewState)
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{
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if (NewState == ENABLE) {
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pADC->CR |= ADC_CR_CH_SEL(channel);
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}
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else {
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pADC->CR &= ~ADC_CR_START_MASK;
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pADC->CR &= ~ADC_CR_CH_SEL(channel);
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}
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}
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/* Enable burst mode */
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void Chip_ADC_SetBurstCmd(LPC_ADC_T *pADC, FunctionalState NewState)
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{
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setStartMode(pADC, ADC_NO_START);
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#if defined(CHIP_LPC1347)
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pADC->INTEN &= ~(1 << 8);
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#endif
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if (NewState == DISABLE) {
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pADC->CR &= ~ADC_CR_BURST;
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}
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else {
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pADC->CR |= ADC_CR_BURST;
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}
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}
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/* Read the ADC value and convert it to 8bits value */
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Status Chip_ADC_ReadByte(LPC_ADC_T *pADC, ADC_CHANNEL_T channel, uint8_t *data)
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{
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uint16_t temp=0;
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Status rt;
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rt = readAdcVal(pADC, channel, &temp);
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*data = (uint8_t) temp;
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return rt;
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}
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