adc_driver.c

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#include "adc_driver.h"
 
ADC_CHANNEL_T adc_channel_ = ADC_CH0;
 
 
#define MAX_ADC_CHANNELS 8
 
 
void board_adc_init(uint8_t channel)
{
    ADC_CLOCK_SETUP_T adc_config;
    adc_config.adcRate = ADC_MAX_SAMPLE_RATE;
    adc_config.bitsAccuracy = ADC_10BITS;
    adc_config.burstMode = FALSE;
 
    board_adc_set_channel(channel);
 
    Chip_SCU_ADC_Channel_Config(0, adc_channel_);
    Chip_ADC_Init(LPC_ADC0, &adc_config);
    Chip_ADC_EnableChannel(LPC_ADC0, adc_channel_, ENABLE);
}
 
 
void board_adc_int_enable()
{
    NVIC_ClearPendingIRQ(ADC0_IRQn);
    NVIC_EnableIRQ(ADC0_IRQn);
    Chip_ADC_Int_SetChannelCmd(LPC_ADC0, adc_channel_, ENABLE);
    Chip_ADC_SetStartMode(LPC_ADC0, ADC_START_NOW, ADC_TRIGGERMODE_RISING);
}
 
 
void board_adc_set_channel(uint8_t channel)
{
    if (channel < MAX_ADC_CHANNELS) { adc_channel_ = (ADC_CHANNEL_T) channel; }
}
 
uint16_t board_adc_polling()
{
    uint16_t adc_value;
    Chip_ADC_SetStartMode(LPC_ADC0, ADC_START_NOW, ADC_TRIGGERMODE_RISING);
    while (Chip_ADC_ReadStatus(LPC_ADC0, adc_channel_, ADC_DR_DONE_STAT) == RESET) {}
    Chip_ADC_ReadValue(LPC_ADC0, adc_channel_, &adc_value);
    return adc_value;
}