annotate libs/STM32F10x_StdPeriph_Lib_V3.5.0/Project/STM32F10x_StdPeriph_Examples/I2C/IOExpander/readme.txt @ 55:b21db2b47a27

Enable DMA mode by initing DMA channel and enabling IRQ handler.
author Daniel O'Connor <darius@dons.net.au>
date Sun, 07 Apr 2013 22:34:05 +0930
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1 /**
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2 @page IOExpander_Example I2C and STMPE811 IO Expander communication example
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3
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4 @verbatim
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5 ******************** (C) COPYRIGHT 2011 STMicroelectronics *******************
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6 * @file I2C/IOExpander/readme.txt
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7 * @author MCD Application Team
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8 * @version V3.5.0
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9 * @date 08-April-2011
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10 * @brief Description of the I2C and STMPE811 IO Expander communication
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11 * example.
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12 ******************************************************************************
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13 * THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
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14 * WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE
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15 * TIME. AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY
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16 * DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING
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17 * FROM THE CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE
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18 * CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
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19 ******************************************************************************
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20 @endverbatim
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21
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22 @par Example Description
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23
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24 This firmware provides an example of configuring and using the IO Expander STMPE811
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25 in order to control input Joystick IOs, output IOs and the Touch Screen feature.
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26 This example provides the elementary steps to control the following modules and
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27 use them in an application:
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28 The IO pins are used for:
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29 - Getting Joystick pins status (Polling and interrupt) only for STM3210C-EVAL.
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30 - The Touch Screen controller is used to get the Touched area detection information
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31 in a single point mode (Polling and interrupt).
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32
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33 The input information can be used either in Polling mode (uncomment the define
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34 #define IOE_POLLING_MODE) or in Interrupt mode (uncomment the define #define
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35 IOE_INTERRUPT_MODE). These defines are in main.h file.
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36
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37 After configuring the IO Expander modules and Interrupts (if needed), the output
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38 IOs are set to their default state. These operations are done by the functions:
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39 IOE_Config() and IOE_ITConfig(). If the IO Expander is not operational (or the
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40 I2C pins are not in the correct level) the IOE_Config() function returns a value
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41 different from 0 and a message is displayed on the LCD screen.
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42
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43 To get the status of an input:
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44 - IOE_JoyStickGetState() function is used for Joystick and returns a JOY_State_TypeDef
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45 value indicating the currently pressed key. This information is used to update
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46 the LCD display (the Joystick pressed key name is displayed) (only for STM3210C-EVAL).
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47 - IOE_TS_GetState() function is used for Touch Screen and returns a pointer to
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48 a structure holding the Touch Screen status (did a Touch Detection happened,
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49 X, Y, and Z positions). Only detection into the drawn rectangles areas is
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50 considered and used to update the LEDs status and LCD display (corresponding
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51 LED turned ON when its rectangle is touched, and the LED name is displayed on
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52 the LCD screen).
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53
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54 Besides, the examples checks the status of the other Push-Buttons implemented on
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55 the board (Key, Tamper and WakeUp push-buttons). They are checked in parallel
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56 with the IO Expander IOs and the LCD display and LEDs are updated according to
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57 the push buttons state.
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58
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59
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60 @par Directory contents
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61
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62 - I2C/IOExpander/stm32f10x_conf.h Library Configuration file
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63 - I2C/IOExpander/stm32f10x_it.c Interrupt handlers
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64 - I2C/IOExpander/stm32f10x_it.h Header for stm32f10x_it.c
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65 - I2C/IOExpander/main.c Main program
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66 - I2C/IOExpander/main.h Header for main.c
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67 - I2C/IOExpander/system_stm32f10x.c STM32F10x system source file
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68
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69
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70 @par Hardware and Software environment
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71
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72 - This example runs on STM32F10x Connectivity line, High-Density, High-Density
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73 Value line, Medium-Density, XL-Density, High-Density Value line, Medium-Density
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74 Value line, Low-Density and Low-Density Value line Devices.
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75
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76 - This example has been tested with STMicroelectronics STM32100E-EVAL (High-Density
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77 Value line) and STM3210C-EVAL (Connectivity line) evaluation boards
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78 and can be easily tailored to any other supported device and development
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79 board.
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80
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81 - STM32100E-EVAL Set-up
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82 - Use two IO Expanders connected to I2C2 SCL and SDA pins PB10 and PB11 and
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83 interrupt output pin connected to PA12 (EXTI mode). IO Expander 1 address
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84 pins is connected to Gnd (address is 0x82).
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85 - Use LED1, LED2, LED3 and LED4 connected respectively to PF.06, PF.07, PF.08
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86 and PF.09 pins
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87 - Use LCD connected to SPI3 remapped pins SCK, MISO and MOSI: PC10, PC11,
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88 PC12 and the CS pin PB2.
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89 - Use LCD Touch Screen module connected to IO Expander 1 pins IO_Pin_1,
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90 IO_Pin_2, IO_Pin_3 and IO_Pin_4 (respectively Y-, X-, Y+, X+ lines).
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91
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92 - STM3210C-EVAL Set-up
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93 - Use two IO Expanders connected to I2C1 SCL and SDA pins PB6 and PB7 and
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94 interrupt output pin connected to PB14 (EXTI mode). IO Expander 1 address
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95 pins is connected to Gnd (address is 0x82) and IO Expander 2 address pins
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96 is connected to Vcc (address is 0x88).
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97 - Use LED1, LED2, LED3 and LED4 connected respectively to PD.07, PD.13, PF.03
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98 and PD.04 pins
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99 - Use LCD connected to SPI3 remapped pins SCK, MISO and MOSI: PC10, PC11,
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100 PC12 and the CS pin PB2.
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101 - Use LCD Touch Screen module connected to IO Expander 1 pins IO_Pin_1,
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102 IO_Pin_2, IO_Pin_3 and IO_Pin_4 (respectively Y-, X-, Y+, X+ lines).
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103 - Use Joystick module connected to IO Expander 2 pins IO_Pin_3, IO_Pin_4,
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104 IO_Pin_5, IO_Pin_6 and IO_Pin_7 (respectively UP, Right, Left, Down and Center)
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105
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106
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107 @par How to use it ?
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108
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109 In order to make the program work, you must do the following :
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110 - Copy all source files from this example folder to the template folder under
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111 Project\STM32F10x_StdPeriph_Template
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112 - Open your preferred toolchain
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113 - Rebuild all files and load your image into target memory
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114 - Run the example
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115
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116 @note
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117 - Low-density Value line devices are STM32F100xx microcontrollers where the
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118 Flash memory density ranges between 16 and 32 Kbytes.
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119 - Low-density devices are STM32F101xx, STM32F102xx and STM32F103xx
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120 microcontrollers where the Flash memory density ranges between 16 and 32 Kbytes.
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121 - Medium-density Value line devices are STM32F100xx microcontrollers where
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122 the Flash memory density ranges between 64 and 128 Kbytes.
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123 - Medium-density devices are STM32F101xx, STM32F102xx and STM32F103xx
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124 microcontrollers where the Flash memory density ranges between 64 and 128 Kbytes.
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125 - High-density Value line devices are STM32F100xx microcontrollers where
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126 the Flash memory density ranges between 256 and 512 Kbytes.
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127 - High-density devices are STM32F101xx and STM32F103xx microcontrollers where
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128 the Flash memory density ranges between 256 and 512 Kbytes.
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129 - XL-density devices are STM32F101xx and STM32F103xx microcontrollers where
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130 the Flash memory density ranges between 512 and 1024 Kbytes.
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131 - Connectivity line devices are STM32F105xx and STM32F107xx microcontrollers.
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132
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133 * <h3><center>&copy; COPYRIGHT 2011 STMicroelectronics</center></h3>
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134 */