blob: ecb06f569dd7753cbaf380b5f7ecae392a9db36f (
plain)
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
|
/******************** (C) COPYRIGHT 2008 STMicroelectronics ********************
* File Name : readme.txt
* Author : MCD Application Team
* Version : V2.0.1
* Date : 06/13/2008
* Description : Description of the ADC external lines trigger example.
********************************************************************************
* THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
* WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE TIME.
* AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY DIRECT,
* INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING FROM THE
* CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE CODING
* INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
*******************************************************************************/
Example description
===================
This example describes how to trigger ADC regular and injected groups channels
conversion using two external line events. Discontinuous mode is enabled for regular
group channel conversion and configured to convert one regular channel on each
external trigger.
ADC1 is configured to start regular group channel conversion on EXTI11 event.
On detection of the first rising edge on PE.11 pin, the conversion of the first regular
channel (ADC channel4) is done and its converted value is transfered by DMA to
ADC_RegularConvertedValueTab table. On the following edge detection, the second
regular channel (ADC channel14) is automatically converted and its converted value
is stored by DMA in the same table. The number of transmitted data by DMA, in this
example is limited to 64 data.
The procedure is repeated for both regular channels on each EXTI11 event.
ADC1 is configured to start injected group channel conversion on EXTI15 event.
On detection of the first rising edge on PE.15 pin all selected injected channels, which
are two in this example (ADC channel11 and channel12), are converted and an interrupt
is generated on JEOC flag rising at the end of all injected channels conversion.
Both injected channels converted results are stored in ADC_InjectedConvertedValueTab
table inside the interrupt routine.
The procedure is repeated for injected channels on each EXTI15 event.
The ADC1 clock is set to 14 MHz.
Directory contents
==================
stm32f10x_conf.h Library Configuration file
stm32f10x_it.c Interrupt handlers
stm32f10x_it.h Interrupt handlers header file
main.c Main program
Hardware environment
====================
This example runs on STMicroelectronics STM3210B-EVAL and STM3210E-EVAL evaluation
boards and can be easily tailored to any other hardware.
- Connect a known voltage, between 0-3.3V, to ADC Channel14 mapped on pin PC.04
(potentiometer RV1 on STM3210B-EVAL and STM3210E-EVAL boards), ADC Channel4 mapped
on pin PA.04, ADC Channel11 mapped on pin PC.01 and ADC Channel12 mapped on pin PC.02.
- Connect a push-button to pin PE.11 (EXTI Line11) and another push-button to
pin PE.15 (EXTI Line15).
How to use it
=============
In order to make the program work, you must do the following :
- Create a project and setup all your toolchain's start-up files
- Compile the directory content files and required Library files :
+ stm32f10x_lib.c
+ stm32f10x_adc.c
+ stm32f10x_dma.c
+ stm32f10x_exti.c
+ stm32f10x_gpio.c
+ stm32f10x_rcc.c
+ stm32f10x_nvic.c
+ stm32f10x_flash.c
- Link all compiled files and load your image into target memory
- Run the example
******************* (C) COPYRIGHT 2008 STMicroelectronics *****END OF FILE******
|
