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CHEBUZZF3 - Implement ADC driver for 3 ADC channels. Use STM32F3 linker

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script so it uses the right values for RAM and FLASH size.
This commit is contained in:
Dominic Clifton 2014-05-12 00:17:14 +01:00
parent b3ee895f97
commit 4be9d953ac
9 changed files with 398 additions and 89 deletions
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111
src/drivers/adc_stm32f30x.c Normal file
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#include <stdbool.h>
#include <stdint.h>
#include "platform.h"
#include "system_common.h"
#include "gpio_common.h"
#include "sensors_common.h" // FIXME dependency into the main code
#include "accgyro_common.h"
#include "adc_common.h"
extern adc_config_t adcConfig[ADC_CHANNEL_COUNT];
extern volatile uint16_t adcValues[ADC_CHANNEL_COUNT];
uint8_t adcChannelCount;
void adcInit(drv_adc_config_t *init)
{
ADC_InitTypeDef ADC_InitStructure;
DMA_InitTypeDef DMA_InitStructure;
GPIO_InitTypeDef GPIO_InitStructure;
uint8_t i;
adcConfig[ADC_BATTERY].adcChannel = ADC_Channel_6;
adcConfig[ADC_BATTERY].dmaIndex = adcChannelCount;
adcChannelCount++;
adcConfig[ADC_EXTERNAL1].adcChannel = ADC_Channel_7;
adcConfig[ADC_EXTERNAL1].dmaIndex = adcChannelCount;
adcChannelCount++;
adcConfig[ADC_EXTERNAL2].adcChannel = ADC_Channel_8;
adcConfig[ADC_EXTERNAL2].dmaIndex = adcChannelCount;
adcChannelCount++;
DMA_DeInit(DMA1_Channel1);
DMA_StructInit(&DMA_InitStructure);
DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)&ADC1->DR;
DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)adcValues;
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
DMA_InitStructure.DMA_BufferSize = adcChannelCount;
DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
DMA_InitStructure.DMA_MemoryInc = adcChannelCount > 1 ? DMA_MemoryInc_Enable : DMA_MemoryInc_Disable;
DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;
DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord;
DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;
DMA_InitStructure.DMA_Priority = DMA_Priority_High;
DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;
DMA_Init(DMA1_Channel1, &DMA_InitStructure);
DMA_Cmd(DMA1_Channel1, ENABLE);
GPIO_StructInit(&GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1 | GPIO_Pin_2 | GPIO_Pin_3;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AN;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL ;
GPIO_Init(GPIOC, &GPIO_InitStructure);
// calibrate
ADC_VoltageRegulatorCmd(ADC1, ENABLE);
delay(10);
ADC_SelectCalibrationMode(ADC1, ADC_CalibrationMode_Single);
ADC_StartCalibration(ADC1);
while(ADC_GetCalibrationStatus(ADC1) != RESET);
ADC_VoltageRegulatorCmd(ADC1, DISABLE);
ADC_CommonInitTypeDef ADC_CommonInitStructure;
ADC_CommonStructInit(&ADC_CommonInitStructure);
ADC_CommonInitStructure.ADC_Mode = ADC_Mode_Independent;
ADC_CommonInitStructure.ADC_Clock = ADC_Clock_SynClkModeDiv4;
ADC_CommonInitStructure.ADC_DMAAccessMode = ADC_DMAAccessMode_1;
ADC_CommonInitStructure.ADC_DMAMode = ADC_DMAMode_Circular;
ADC_CommonInitStructure.ADC_TwoSamplingDelay = 0;
ADC_CommonInit(ADC1, &ADC_CommonInitStructure);
ADC_StructInit(&ADC_InitStructure);
ADC_InitStructure.ADC_ContinuousConvMode = ADC_ContinuousConvMode_Enable;
ADC_InitStructure.ADC_Resolution = ADC_Resolution_12b;
ADC_InitStructure.ADC_ExternalTrigConvEvent = ADC_ExternalTrigConvEvent_0;
ADC_InitStructure.ADC_ExternalTrigEventEdge = ADC_ExternalTrigEventEdge_None;
ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
ADC_InitStructure.ADC_OverrunMode = ADC_OverrunMode_Disable;
ADC_InitStructure.ADC_AutoInjMode = ADC_AutoInjec_Disable;
ADC_InitStructure.ADC_NbrOfRegChannel = adcChannelCount;
ADC_Init(ADC1, &ADC_InitStructure);
for (i = 0; i < adcChannelCount; i++)
ADC_RegularChannelConfig(ADC1, adcConfig[i].adcChannel, i + 1, ADC_SampleTime_181Cycles5);
ADC_Cmd(ADC1, ENABLE);
while(!ADC_GetFlagStatus(ADC1, ADC_FLAG_RDY));
ADC_DMAConfig(ADC1, ADC_DMAMode_Circular);
ADC_DMACmd(ADC1, ENABLE);
ADC_StartConversion(ADC1);
}