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ADC_DMA_main.c File Reference

This code example demonstrates how to read data from ADC. More...

`#include "BlueNRG1.h"`
`#include "BlueNRG1_conf.h"`
`#include "SDK_EVAL_Config.h"`
`#include <stdio.h>`
`#include <stdlib.h>`

Go to the source code of this file.

## Macros

#define | SYST_CLOCK 16000000 /* System clock frequency */
#define | ADC_OUT_ADDRESS (ADC_BASE + 0x14)
#define | ADC_DMA_CH0 (DMA_CH0)
#define | ADC_DMA_BUFFER_LEN (256)

## Functions

void | SdkDelayMs (volatile uint32_t lTimeMs)
| Delay function in ms. More...
void | ADC_Configuration (void)
| ADC_Configuration. More...
void | DMA_Configuration (void)
| DMA_Configuration. More...
int | main (void)
| Main program. More...

## Variables

volatile uint32_t | lSystickCounter =0
ADC_InitType | xADC_InitType
uint32_t | buffer_adc [ADC_DMA_BUFFER_LEN]

## Detailed Description

This code example demonstrates how to read data from ADC.

# ATOLLIC project

To use the project with ATOLLIC TrueSTUDIO for ARM, please follow the instructions below:

1. Open the ATOLLIC TrueSTUDIO for ARM and select File->Import... Project menu.
2. Select Existing Projects into Workspace.
3. Select the ATOLLIC project
4. Select desired configuration to build from Project->Manage Configurations
5. Select Project->Rebuild Project. This will recompile and link the entire application
6. To download the binary image, please connect STLink to JTAG connector in your board (if available).
7. Select Project->Download to download the related binary image.
8. Alternatively, open the BlueNRG1 GUI, put the board in bootloader mode and download the built binary image.

# KEIL project

To use the project with KEIL uVision 5 for ARM, please follow the instructions below:

1. Open the KEIL uVision 5 for ARM and select Project->Open Project menu.
2. Open the KEIL project `...\Project\BlueNRG1_Periph_Examples\ADC\DMA\MDK-ARM\DMA.uvprojx`
3. Select desired configuration to build
4. Select Project->Rebuild all target files. This will recompile and link the entire application
5. To download the binary image, please connect STLink to JTAG connector in your board (if available).
6. Select Project->Download to download the related binary image.
7. Alternatively, open the BlueNRG1 GUI, put the board in bootloader mode and download the built binary image.

# IAR project

To use the project with IAR Embedded Workbench for ARM, please follow the instructions below:

1. Open the Embedded Workbench for ARM and select File->Open->Workspace menu.
2. Open the IAR project `...\Project\BlueNRG1_Periph_Examples\ADC\DMA\EWARM\DMA.eww`
3. Select desired configuration to build
4. Select Project->Rebuild All. This will recompile and link the entire application
5. To download the binary image, please connect STLink to JTAG connector in your board (if available).
6. Select Project->Download and Debug to download the related binary image.
7. Alternatively, open the BlueNRG1 GUI, put the board in bootloader mode and download the built binary image.

## Project configurations

- `Release` - Release configuration

# Boards supported

- `STEVAL-IDB007V1`

# Power configuration settings

STEVAL-IDB007V1
Jumper name |  | Description
JP1 | JP2 |
ON 1-2 | ON 2-3 | USB supply power
ON 2-3 | ON 1-2 | The supply voltage must be provided through battery pins.
ON 1-2 |  | USB supply power to STM32L1, JP2 pin 2 external power to BlueNRG1

# Jumper settings

STEVAL-IDB007V1
Jumper name | Description
JP1 | 1-2: to provide power from USB (JP2:2-3). 2-3: to provide power from battery holder (JP2:1-2)
JP2 | 1-2: to provide power from battery holder (JP1:2-3). 2-3: to provide power from USB (JP1:1-2). Pin2 to VDD to provide external power supply to BlueNRG-1 (JP1: 1-2)
JP3 | pin 1 and 2 UART RX and TX of MCU. pin 3 GND.
JP4 | Fitted: to provide VBLUE to BlueNRG1. It can be used also for current measurement.
JP5 | Fitted : TEST pin to VBLUE. Not fitted: TEST pin to GND

# Pin settings

PIN name | STEVAL-IDB007V1
ADC1 | ADC2 pin
ADC2 | ADC1 pin
IO0 | Not Used
IO1 | Not Used
IO11 | UART RX pin
IO12 | Not Used
IO13 | Not Used
IO14 | Not Used
IO2 | Not Used
IO3 | Not Used
IO4 | Not Used
IO5 | Not Used
IO6 | Not Used
IO7 | Not Used
IO8 | UART TX pin
TEST1 | Not Used

# Serial I/O

The application will listen for keys typed and it will send back in the serial port. In other words everything typed in serial port will be send back.

Parameter name | Value | Unit
Baudrate | 115200 [default] | bit/sec
Data bits | 8 | bit
Parity | None | bit
Stop bits | 1 | bit

# LEDs description

LED name | STEVAL-IDB007V1
DL1 | Not Used
DL2 | Not Used
DL3 | Not Used
DL4 | Power

# Buttons description

BUTTON name | STEVAL-IDB007V1
PUSH1 | Not Used
PUSH2 | Not Used
RESET | Reset BlueNRG1

# Usage

The Analog-to-Digital Converted (ADC) allows to converts continuously of in single ended from different sources: ADC1 pin, ADC2 pin, Battery level, differential ADC1-ADC2. The sampling frequency is 1 MHz.

In the example, the conversion is managed through the ADC DMA channel. The systick timer is used to have a delay of 100ms between two samples. Each sample from ADC is printed through UART (USB-to-SERIAL must be connected to the PC).

The default input is the differential ADC1-ADC2.

Definition in file ADC_DMA_main.c.