Files
@ ec79a7a31ac7
Branch filter:
Location: protofuse-firmware/src/adc.c
ec79a7a31ac7
3.0 KiB
text/plain
Added DMA and got the ADC working.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 | /*
* adc.c
*
* Created on: Aug 9, 2016
* Author: Nicholas Orlando
*/
/* Includes ------------------------------------------------------------------*/
#include "adc.h"
#include "gpio.h"
#include "dma.h"
/* USER CODE BEGIN 0 */
/* USER CODE END 0 */
// Peripheral Handles
ADC_HandleTypeDef hadc1;
DMA_HandleTypeDef hdma_adc1;
// Private Variables
static uint16_t adc_readings[3];
uint16_t get_viout_counts(void)
{
return adc_readings[ADC_CHAN_VIOUT];
}
uint16_t get_vbat_counts(void)
{
return adc_readings[ADC_CHAN_VBAT];
}
/* ADC1 init function */
void adc_init(void)
{
/* Peripheral clock enable */
__HAL_RCC_ADC1_CLK_ENABLE();
__HAL_RCC_DMA1_CLK_ENABLE();
__HAL_RCC_GPIOA_CLK_ENABLE();
GPIO_InitTypeDef GPIO_InitStruct;
/**ADC1 GPIO Configuration
PA0 ------> ADC1_IN1
PA1 ------> ADC1_IN2
PA2 ------> ADC1_IN3
*/
GPIO_InitStruct.Pin = GPIO_PIN_0|GPIO_PIN_1|GPIO_PIN_2;
GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;
GPIO_InitStruct.Pull = GPIO_NOPULL;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
/**Common config
*/
hadc1.Instance = ADC1;
hadc1.Init.ClockPrescaler = ADC_CLOCK_ASYNC_DIV1;
hadc1.Init.Resolution = ADC_RESOLUTION_12B;
hadc1.Init.ScanConvMode = ADC_SCAN_ENABLE;
hadc1.Init.ContinuousConvMode = ENABLE;
hadc1.Init.DiscontinuousConvMode = DISABLE;
hadc1.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_NONE;
hadc1.Init.DataAlign = ADC_DATAALIGN_RIGHT;
hadc1.Init.NbrOfConversion = 1;
hadc1.Init.DMAContinuousRequests = ENABLE;
hadc1.Init.EOCSelection = ADC_EOC_SINGLE_CONV;
hadc1.Init.LowPowerAutoWait = DISABLE;
hadc1.Init.Overrun = ADC_OVR_DATA_OVERWRITTEN;
HAL_ADC_Init(&hadc1);
/* Peripheral DMA init*/
hdma_adc1.Instance = DMA1_Channel1;
hdma_adc1.Init.Direction = DMA_PERIPH_TO_MEMORY;
hdma_adc1.Init.PeriphInc = DMA_PINC_DISABLE;
hdma_adc1.Init.MemInc = DMA_MINC_ENABLE;
hdma_adc1.Init.PeriphDataAlignment = DMA_PDATAALIGN_HALFWORD;
hdma_adc1.Init.MemDataAlignment = DMA_MDATAALIGN_HALFWORD;
hdma_adc1.Init.Mode = DMA_CIRCULAR;
hdma_adc1.Init.Priority = DMA_PRIORITY_LOW;
HAL_DMA_Init(&hdma_adc1);
__HAL_LINKDMA(&hadc1,DMA_Handle,hdma_adc1);
ADC_ChannelConfTypeDef sConfig;
// Configure VIOUT channel
sConfig.Channel = ADC_CHANNEL_1;
sConfig.Rank = ADC_REGULAR_RANK_1;
sConfig.SamplingTime = ADC_SAMPLETIME_601CYCLES_5;
HAL_ADC_ConfigChannel(&hadc1, &sConfig);
// Configure VIOUT-GAINS channel
sConfig.Channel = ADC_CHANNEL_2;
sConfig.Rank = ADC_REGULAR_RANK_2;
sConfig.SamplingTime = ADC_SAMPLETIME_601CYCLES_5;
HAL_ADC_ConfigChannel(&hadc1, &sConfig);
// Configure VBAT channel
sConfig.Channel = ADC_CHANNEL_3;
sConfig.Rank = ADC_REGULAR_RANK_3;
sConfig.SamplingTime = ADC_SAMPLETIME_601CYCLES_5;
HAL_ADC_ConfigChannel(&hadc1, &sConfig);
HAL_ADC_Start_DMA(&hadc1, (uint32_t*)adc_readings, 3);
// HAL_NVIC_SetPriority(DMA1_Channel1_IRQn, 0, 0);
// HAL_NVIC_EnableIRQ(DMA1_Channel1_IRQn);
}
|