diff options
Diffstat (limited to 'os/hal/platforms/AVR/adc_lld.c')
| -rw-r--r-- | os/hal/platforms/AVR/adc_lld.c | 191 |
1 files changed, 0 insertions, 191 deletions
diff --git a/os/hal/platforms/AVR/adc_lld.c b/os/hal/platforms/AVR/adc_lld.c deleted file mode 100644 index 13656cfdb..000000000 --- a/os/hal/platforms/AVR/adc_lld.c +++ /dev/null @@ -1,191 +0,0 @@ -/*
- ChibiOS/RT - Copyright (C) 2006-2013 Giovanni Di Sirio
-
- Licensed under the Apache License, Version 2.0 (the "License");
- you may not use this file except in compliance with the License.
- You may obtain a copy of the License at
-
- http://www.apache.org/licenses/LICENSE-2.0
-
- Unless required by applicable law or agreed to in writing, software
- distributed under the License is distributed on an "AS IS" BASIS,
- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- See the License for the specific language governing permissions and
- limitations under the License.
-*/
-
-/**
- * @file AVR/adc_lld.c
- * @brief ADC Driver subsystem low level driver source.
- *
- * @addtogroup ADC
- * @{
- */
-
-#include "ch.h"
-#include "hal.h"
-
-#if HAL_USE_ADC || defined(__DOXYGEN__)
-
-/*===========================================================================*/
-/* Driver local definitions. */
-/*===========================================================================*/
-
-/*===========================================================================*/
-/* Driver exported variables. */
-/*===========================================================================*/
-/** @brief ADC1 driver identifier.*/
-#if AVR_ADC_USE_ADC1 || defined(__DOXYGEN__)
-ADCDriver ADCD1;
-#endif
-/*===========================================================================*/
-/* Driver local variables. */
-/*===========================================================================*/
-
-/*===========================================================================*/
-/* Driver local functions. */
-/*===========================================================================*/
-
-static size_t getAdcChannelNumberFromMask(uint8_t mask, uint8_t currentChannel) {
-
- for (uint8_t i = 0; mask > 0; i++) {
- if (mask & 0x01) {
- if (!currentChannel)
- return i;
- currentChannel--;
- }
- mask >>= 1;
- }
-
- /* error, should never reach this line */
-}
-
-static void setAdcChannel(uint8_t channelNum) {
-
- ADMUX = (ADMUX & 0xf8) | (channelNum & 0x07);
-
-}
-
-/*===========================================================================*/
-/* Driver interrupt handlers. */
-/*===========================================================================*/
-
-#include <util/delay.h>
-
-CH_IRQ_HANDLER(ADC_vect) {
-
- CH_IRQ_PROLOGUE();
- uint8_t low = ADCL;
- uint8_t high = ADCH;
- uint16_t result = (high << 8) | low;
-
- ADCD1.samples[ADCD1.currentBufferPosition] = result;
- ADCD1.currentBufferPosition++;
-
- size_t bufferSize = ADCD1.depth * ADCD1.grpp->num_channels;
- size_t currentChannel = ADCD1.currentBufferPosition % ADCD1.grpp->num_channels;
- size_t currentIteration = ADCD1.currentBufferPosition / ADCD1.grpp->num_channels;
- if (ADCD1.grpp->circular && currentChannel == 0 && currentIteration == ADCD1.depth/2) {
- _adc_isr_half_code(&ADCD1);
- }
-
- if (ADCD1.currentBufferPosition == bufferSize) {
- _adc_isr_full_code(&ADCD1);
- } else {
- setAdcChannel(getAdcChannelNumberFromMask(ADCD1.grpp->channelsMask,currentChannel));
- ADCSRA |= 1 << ADSC;
- }
-
- CH_IRQ_EPILOGUE();
-}
-
-/*===========================================================================*/
-/* Driver exported functions. */
-/*===========================================================================*/
-
-/**
- * @brief Low level ADC driver initialization.
- *
- * @notapi
- */
-void adc_lld_init(void) {
-
- adcObjectInit(&ADCD1);
-
- //prescaler 128, only value possible at 20Mhz, interrupt
- ADCSRA = (1 << ADPS2) | (1 << ADPS1) | (1 << ADPS0) | (1 << ADIE);
-
- ADCSRB = 0; //single shot
-
- //uso aref, only valid for arduino. arduino ha aref collegato
- ADMUX = (0 << REFS1) | (0 << REFS0);
-
-}
-
-/**
- * @brief Configures and activates the ADC peripheral.
- *
- * @param[in] adcp pointer to the @p ADCDriver object
- *
- * @notapi
- */
-void adc_lld_start(ADCDriver *adcp) {
-
- if (adcp->state == ADC_STOP) {
- /* Clock activation.*/
- ADCSRA |= (1 << ADEN);
- }
-
- if (adcp->config != NULL) {
- ADMUX = (adcp->config->analog_reference << REFS0);
- }
-}
-
-/**
- * @brief Deactivates the ADC peripheral.
- *
- * @param[in] adcp pointer to the @p ADCDriver object
- *
- * @notapi
- */
-void adc_lld_stop(ADCDriver *adcp) {
-
- if (adcp->state == ADC_READY) {
- /* Clock de-activation.*/
- ADCSRA &= ~(1 << ADEN);
- }
-
-}
-
-/**
- * @brief Starts an ADC conversion.
- *
- * @param[in] adcp pointer to the @p ADCDriver object
- *
- * @notapi
- */
-void adc_lld_start_conversion(ADCDriver *adcp) {
-
- adcp->currentBufferPosition=0;
-
- setAdcChannel(getAdcChannelNumberFromMask(adcp->grpp->channelsMask,0));
- ADCSRA |= 1 << ADSC;
-
-}
-
-/**
- * @brief Stops an ongoing conversion.
- *
- * @param[in] adcp pointer to the @p ADCDriver object
- *
- * @notapi
- */
-void adc_lld_stop_conversion(ADCDriver *adcp) {
-
- ADCSRA &= ~(1 << ADSC);
-
-}
-
-#endif /* HAL_USE_ADC */
-
-/** @} */
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