Abl-electronic PIC Microcontrollers PIC16 Manual de usuario Pagina 147
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ADC (Analog to Digital Converter) module is available with a number of PIC
MCU models. Library function Adc_Read is included to provide you comfortable
work with the module.
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ADC Library
Prototype
unsigned Adc_Read(char channel);
Returns 10-bit unsigned value read from the specified ADC channel.
Description Initializes PIC’s internal ADC module to work with RC clock. Clock determines the
time period necessary for performing AD conversion (min 12TAD).
Parameter
channel represents the channel from which the analog value is to be
acquired. For channel-to-pin mapping please refer to documentation for the appropriate
PIC MCU.
Requires PIC MCU with built-in ADC module. You should consult the Datasheet documentation
for specific device (most devices from PIC16/18 families have it).
Before using the function, be sure to configure the appropriate TRISA bits to designate
the pins as input. Also, configure the desired pin as analog input, and set Vref (voltage
reference value).
The function is currently unsupported by the following PICmicros: P18F2331,
P18F2431, P18F4331, and P18F4431.
Example
unsigned tmp;
...
tmp = Adc_Read(1);
/* read analog value from channel 1 */
Adc_Read
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- ANSI Standard Issues 40
- Accessing Individual Bits 41
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- LEXICAL ELEMENTS 44
- Comments 45
- CONSTANTS 47
- Floating Point Constants 49
- Character Constants 50
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- /* is same as: */ 77
- Pointer Arithmetic 78
- // so a[3] now equals 6 80
- Structures 82
- // incomplete 83
- // direct access to member m 85
- // identical to (*ps).m 85
- Bit Fields 88
- // Relevant bits 2, 3, and 4 89
- TYPES CONVERSIONS 90
- DECLARATIONS 93
- // No size 96
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- // Add member declarators 96
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- Type Qualifiers 99
- Typedef Specifier 100
- // just a test 101
- Initialization 102
- FUNCTIONS 103
- Function Prototypes 104
- Function Definition 105
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- // prototype 107
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- OPERATORS 108
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- Relational Operators 112
- Bitwise Operators 113
- Logical Operators 115
- /* equals 000000 */ 116
- /* equals 1 */ 116
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- Conditional Operator ? : 117
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- Sizeof Operator 120
- EXPRESSIONS 121
- STATEMENTS 123
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- Selection Statements 124
- Iteration Statements 127
- ;) for a loop body 129
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- /* error handling code */ 131
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- BUILT-IN ROUTINES 144
- Delay_Cyc 145
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- LIBRARY ROUTINES 146
- ADC Library 147
- Library Example 148
- Hardware Connection 148
- CAN Library 149
- CANSetOperationMode 150
- CANGetOperationMode 150
- CANInitialize 151
- CANSetBaudRate 152
- CANSetMask 153
- CANSetFilter 153
- CANWrite 154
- CAN Constants 155
- CANSPI Library 161
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- CANSPIRead 166
- CANSPIWrite 166
- Compact Flash Library 170
- Cf_Total_Size 171
- Cf_Detect 171
- Cf_Enable 172
- Cf_Read_Init 172
- Cf_Disable 172
- Cf_Read_Byte 173
- Cf_Write_Init 173
- Cf_Read_Word 173
- Cf_Write_Byte 174
- Cf_Write_Word 174
- Cf_Find_File 174
- Cf_File_Write_Byte 175
- Cf_Read_Sector 175
- Cf_File_Write_Init 175
- Cf_File_Write_Complete 176
- Cf_Write_Sector 176
- Cf_Set_File_Date 176
- Compact Flash Connector 179
- (TOP VIEW) 179
- Compact Flash Card 179
- PIC16F877A 179
- EEPROM Library 180
- Eeprom_Read 181
- Ethernet Library 182
- Eth_Init 183
- Eth_Set_Ip_Address 183
- Eth_Scan_For_Event 184
- Eth_Set_Inport 184
- Eth_Load_Ip_Packet 185
- Eth_Get_Ip_Hdr_Len 185
- Eth_Get_Dest_Ip_Address 186
- Eth_Get_Hdr_Chksum 186
- Eth_Get_Source_Ip_Address 186
- Eth_Ping_Response 187
- Eth_Get_Icmp_Info 187
- Eth_Arp_Response 187
- Eth_Get_Udp_Dest_Port 188
- Eth_Get_Udp_Source_Port 188
- Eth_Set_Udp_Port 189
- Eth_Get_Udp_Port 189
- Eth_Load_Tcp_Header 190
- Eth_Send_Udp 190
- Eth_Get_Tcp_Flags 191
- Eth_Get_Tcp_Hdr_Offset 191
- Eth_Tcp_Response 192
- Eth_Set_Tcp_Data 192
- RTL8019AS 193
- Flash Memory Library 194
- I2C Library 196
- I2C_Start 197
- I2C_Repeated_Start 197
- I2C_Is_Idle 197
- I2C_Stop 198
- HW Connection 200
- Keypad Library 201
- Keypad_Released 202
- LCD Library (4-bit interface) 205
- Lcd_Init 206
- Lcd_Out_Cp 206
- Lcd_Chr_Cp 207
- LCD Commands 208
- Library Routines 211
- Lcd8_Config 211
- Lcd8_Init 212
- Lcd8_Out 212
- Lcd8_Out_Cp 212
- Lcd8_Chr 213
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- GLCD Library 216
- Glcd_Init 217
- Glcd_Disable 217
- Glcd_Set_Side 217
- Glcd_Set_Page 218
- Glcd_Set_X 218
- Glcd_Read_Data 218
- Glcd_Write_Data 219
- Glcd_Fill 219
- Glcd_Dot 219
- Glcd_Line 220
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- Glcd_Rectangle 221
- Glcd_Box 221
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- Glcd_Image 224
- 0 0 0 0 0 0 227
- 11 1 1 1 227
- Man_Receive_Config 228
- Man_Receive_Init 228
- Man_Receive 228
- Man_Send_Config 229
- Man_Send_Init 229
- Man_Send 229
- Multi Media Card Library 232
- Mmc_Read_Sector 233
- Mmc_Write_Sector 233
- Mmc_Read_Cid 234
- Mmc_Read_Csd 234
- Mmc_Fat_Init 235
- Mmc_Fat_Assign 235
- Mmc_Fat_Reset 236
- Mmc_Fat_Rewrite 236
- Mmc_Fat_Append 236
- Mmc_Fat_Read 237
- Mmc_Fat_Write 237
- Mmc_Set_File_Date 237
- MC33269-3.3 240
- OneWire Library 241
- Ow_Reset 242
- Ow_Write 242
- PS/2 Library 245
- Ps2_Key_Read 246
- PWM Library 248
- Pwm_Change_Duty 249
- Pwm_Start 249
- Pwm_Stop 249
- RS-485 Library 251
- RS485Master_Init 252
- RS485Master_Receive 252
- RS485Master_Send 253
- RS485Slave_Init 253
- RS485Slave_Receive 254
- RS485Slave_Send 254
- Connecting PC and PIC via 256
- RS485 communication line 256
- Secure Digital Library 257
- Sd_Read_Sector 258
- Sd_Write_Sector 258
- Sd_Read_Cid 259
- Sd_Read_Csd 259
- Software I2C Library 262
- Soft_I2C_Start 263
- Soft_I2C_Read 263
- Soft_I2C_Write 264
- Soft_I2C_Stop 264
- Software SPI Library 266
- Soft_Spi_Read 267
- Soft_Spi_Write 267
- Software UART Library 269
- Soft_Uart_Read 270
- Soft_Uart_Write 270
- Sound Library 272
- SPI Library 274
- Spi_Init_Advanced 275
- Spi_Read 276
- Spi_Write 276
- 8. 8. 8. 8. 8. 8. 8. 8 278
- USART Library 279
- Usart_Data_Ready 280
- Usart_Read 280
- Usart_Write 281
- USB HID Library 283
- Hid_Read 284
- Hid_Write 284
- Hid_Disable 284
- PIC18F4550 287
- Util Library 288
- ANSI C Ctype Library 289
- ANSI C Math Library 293
- ANSI C Stdlib Library 299
- ANSI C String Library 303
- Conversions Library 307
- ShortToStr 308
- WordToStr 308
- IntToStr 308
- LongToStr 309
- FloatToStr 309
- Dec2Bcd16 310
- Bcd2Dec16 310
- Trigonometry Library 311
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