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Setting Up the Keypad Port (KPP)
i.MX53 System Development User’s Guide, Rev. 1
17-2 Freescale Semiconductor
17.2 Creating a Custom Keymap
The input.h file defines codes for general keyboards, as follows.
...
#define KEY_HOME 102
#define KEY_UP 103
#define KEY_PAGEUP 104
#define KEY_LEFT 105
#define KEY_RIGHT 106
#define KEY_END 107
#define KEY_DOWN 108
#define KEY_PAGEDOWN 109
#define KEY_INSERT 110
#define KEY_DELETE 111
...
Use these labels or add new ones to create your custom keymap.
17.3 Configuring the Pads with the Machine Layer File
The mx53_<board name>.c file contains the structures to configure the pads. They are as follows:
static struct pad_desc mx53common_pads[] = {
…
…
…
/* Keypad */
MX53_PAD_KEY_COL0__KEY_COL0,
MX53_PAD_KEY_ROW0__KEY_ROW0,
MX53_PAD_KEY_COL1__KEY_COL1,
MX53_PAD_KEY_ROW1__KEY_ROW1,
MX53_PAD_KEY_COL2__KEY_COL2,
MX53_PAD_KEY_ROW2__KEY_ROW2,
MX53_PAD_KEY_COL3__KEY_COL3,
MX53_PAD_KEY_ROW3__KEY_ROW3,
MX53_PAD_KEY_COL4__KEY_COL4,
MX53_PAD_KEY_ROW4__KEY_ROW4,
…
…
…
};
Use the following procedure to configure the pads:
1. Add the configured pin's definitions from the iomux-mx53.h files to the structures in the
mx53_<board name>.c file.
NOTE
Remove any entry that can cause pin conflict. i.e.
MX53_PAD_KEY_COL2_KEY_COL2 conflicts with
MX53_PAD_KEY_COL2_TXCAN1.
2. On init function, set up the pads using the function below:
mxc_iomux_v3_setup_multiple_pads(mx53common_pads, ARRAY_SIZE(mx53common_pads));
- User’s Guide 1
- Document Number: MX53UG 2
- Rev. 1, 3/2011 2
- How to Reach Us: 2
- Contents 10
- Freescale Semiconductor xi 11
- Freescale Semiconductor xiii 13
- Number Title 14
- Freescale Semiconductor xiv 15
- About This Guide 17
- Organization 18
- Essential Reference 19
- Signal Conventions 20
- Acronyms and Abbreviations 20
- Hardware Design and Bring-up 25
- I-2 Freescale Semiconductor 26
- Chapter 1 27
- Design Checklist 27
- 1.2 DDR Reference Circuit 34
- 1.3 Avoiding I 35
- C Conflicts 35
- 1.4 JTAG Signal Termination 36
- Chapter 2 37
- 2-2 Freescale Semiconductor 38
- 2.1.1 Fanout 39
- 2.2 Stackup 40
- Freescale Semiconductor 2-5 41
- 2.5 Routing Topologies 43
- 2.5.1 1 Gbyte Topologies 44
- 2.5.2 2 Gbyte Topologies 45
- 2-10 Freescale Semiconductor 46
- Freescale Semiconductor 2-11 47
- 2.5.3 DDR2 Routing Examples 48
- Freescale Semiconductor 2-19 55
- 2.6 Power Recommendations 62
- 2.8 SATA Recommendations 63
- 2.9 LVDS Recommendations 63
- 2.10 Reference Resistors 64
- Freescale Semiconductor 2-29 65
- 2-30 Freescale Semiconductor 66
- Chapter 3 67
- Understanding the IBIS Model 67
- 3.2 Header Information 68
- 3.4 Model Information 70
- 3-6 Freescale Semiconductor 72
- 3.5 Model Golden Waveforms 73
- 3.6.1 [Model Selector] ddr 74
- 3.6.2 [Model Selector] gpio 74
- 3.6.3 [Model Selector] lvio 75
- 3.6.4 [Model Selector] uhvio 75
- 3.8 References 77
- 3-12 Freescale Semiconductor 78
- Chapter 4 79
- Using the IOMUX Design Aid 79
- 4-2 Freescale Semiconductor 80
- Freescale Semiconductor 4-3 81
- 4-4 Freescale Semiconductor 82
- Freescale Semiconductor 4-5 83
- 4-6 Freescale Semiconductor 84
- Freescale Semiconductor 4-7 85
- 4-8 Freescale Semiconductor 86
- Freescale Semiconductor 4-9 87
- 4-10 Freescale Semiconductor 88
- Freescale Semiconductor 4-11 89
- 4-12 Freescale Semiconductor 90
- 4.5 IOMUX Features Guide 91
- 4.5.2.1 File Menu 92
- 4.5.2.2 Device Menu 93
- 4.5.2.3 View Menu 93
- 4.5.2.4 Help Menu 94
- 4.5.5.1 Signals Tab 94
- 4.5.5.2 Ball Diagram Tab 95
- 4-18 Freescale Semiconductor 96
- Chapter 5 97
- Figure 5-1. Internal LDOs 98
- VB UCKC OR E 99
- Setting up Power Management 100
- Figure 5-3. Power Connections 102
- DA9053 103
- Figure 5-3 and Figure 5-4 104
- 5.3.1 Using the I 105
- C Interface 105
- 5.4 Interface Table 106
- NVCC_EIM_DRAM 108
- Freescale Semiconductor 5-13 109
- LTC3589-1 110
- Optional 110
- Freescale Semiconductor 5-15 111
- 5-16 Freescale Semiconductor 112
- 5.6.1 DA9053 113
- 5-18 Freescale Semiconductor 114
- 5.6.2 LTC3589-1 116
- 9729 117
- 5-22 Freescale Semiconductor 118
- Chapter 6 119
- Processor 119
- 6-2 Freescale Semiconductor 120
- 6.2 i.MX53 Memory Interface 121
- 6.5.1 Main Control Register 128
- 6.5.2 Power Down Register 129
- 31 29 28 26 25 21 20 16 130
- 15 14 12 11 9 8 5 4 3 2 0 130
- 6-14 Freescale Semiconductor 132
- Chapter 7 133
- 7.4 Avoiding Reset Pitfalls 134
- Chapter 8 137
- Freescale Semiconductor 8-3 139
- 8-4 Freescale Semiconductor 140
- Chapter 9 141
- 9-2 Freescale Semiconductor 142
- 4. Save the configuration 143
- 9-4 Freescale Semiconductor 144
- Software Development 145
- II-2 Freescale Semiconductor 146
- Chapter 10 147
- 10.2.2 DDR Test 148
- 10.2.9 SPI-NOR Test 150
- Chapter 11 151
- 11-6 Freescale Semiconductor 156
- Chapter 12 157
- Porting the Android Kernel 157
- 12-2 Freescale Semiconductor 158
- 12.3 Initializing Android 160
- Figure 12-3. Linux Kernel 161
- 12-6 Freescale Semiconductor 162
- Chapter 13 163
- 13.2.1 Defining the Pads 164
- 13.2.3 Example—Setting a GPIO 165
- 13.3.2 Machine Layer File 167
- 13.3.3 Example—Setting a GPIO 167
- • 0x294—MUX Control Offset 168
- • 0—Select Input 168
- Chapter 14 169
- Registering a New UART Driver 169
- 14.3 Testing the UART 170
- 14.4 File Names and Locations 170
- 14-4 Freescale Semiconductor 172
- Chapter 15 173
- Table 15-2. ESDHC Pins 178
- 15.3.3 Interface Layouts 179
- 15-8 Freescale Semiconductor 180
- Chapter 16 181
- (MTD) Driver 181
- .size = 0x000100000 182
- Table 16-3. CSPI Parameters 183
- 16.5 Hardware Operation 184
- 16.6 Software Operation 185
- 16-6 Freescale Semiconductor 186
- Chapter 17 187
- 17.2 Creating a Custom Keymap 188
- 17.4 Enabling the Keypad 189
- 17.5 Testing the Keypad 189
- Chapter 18 191
- Figure 18-2. Interface 194
- Table 18-2. Timing Parameters 194
- Parameters 198
- Table 18-7. Sample Values 199
- CLAA057VA01CT LCD 204
- 18-16 Freescale Semiconductor 206
- Chapter 19 207
- 19.2.2 Programming Interface 208
- 19.3 LDB Ports 209
- 19.4 Further Reading 210
- Chapter 20 211
- 20.5 Using the I 216
- Package List > imx-test 219
- Figure 20-3. Chessboard Test 219
- 20-10 Freescale Semiconductor 220
- Freescale Semiconductor 20-11 221
- 20-14 Freescale Semiconductor 224
- Chapter 21 225
- 21-4 Freescale Semiconductor 228
- Chapter 22 229
- 22.2 Source Code 230
- 22.3 Ethernet Configuration 230
- Chapter 23 231
- Porting USB Host1 and USB OTG 231
- 23-2 Freescale Semiconductor 232
- Appendix A 233
- Revision History 233
- A-4 Freescale Semiconductor 234
- Freescale Semiconductor A-5 235
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