ElectRoidWarE

Connect Matrix Keypad with PIC Controller Code

The mikroC PRO for PIC provides a library for working with 4x4 keypad. The library routines can also be used with 4x1, 4x2, or 4x3 keypad. For connections explanation see schematic at the bottom of this page.

External dependencies of Keypad Library

The following variable must be defined in all projects using Keypad Library:	Description :	Example :
`extern sfr char keypadPort;`	Keypad Port.	`char keypadPort at PORTD;`

Library Routines

Keypad_Init
Keypad_Key_Press
Keypad_Key_Click

Connect I²C with PIC

The I²C full master MSSP module is available with a number of PIC MCU models. mikroC PRO for PIC provides library which supports the master I²C mode.

Important :

Some MCUs have multiple I²C modules. In order to use the desired I²C library routine, simply change the number 1 in the prototype with the appropriate module number, i.e. I2C2_Init(100000);

Library Routines

I2C1_Init
I2C1_Start
I2C1_Repeated_Start
I2C1_Is_Idle
I2C1_Rd
I2C1_Wr
I2C1_Stop

Connect Flash Card with PIC18F4520

The Compact Flash Library provides routines for accessing data on Compact Flash card (abbr. CF further in text). CF cards are widely used memory elements, commonly used with digital cameras. Great capacity and excellent access time of only a few microseconds make them very attractive for microcontroller applications.

In CF card, data is divided into sectors. One sector usually comprises 512 bytes. Routines for file handling, the Cf_Fat routines, are not performed directly but successively through 512B buffer.

Important :

Routines for file handling can be used only with FAT16 file system.
Library functions create and read files from the root directory only.
Library functions populate both FAT1 and FAT2 tables when writing to files, but the file data is being read from the FAT1 table only; i.e. there is no recovery if the FAT1 table gets corrupted.
If MMC/SD card has Master Boot Record (MBR), the library will work with the first available primary (logical) partition that has non-zero size. If MMC/SD card has Volume Boot Record (i.e. there is only one logical partition and no MBRs), the library works with entire card as a single partition. For more information on MBR, physical and logical drives, primary/secondary partitions and partition tables, please consult other resources, e.g. Wikipedia and similar.
Before writing operation, make sure not to overwrite boot or FAT sector as it could make your card on PC or digital camera unreadable. Drive mapping tools, such as Winhex, can be of great assistance.

Connect CAN-SPI with PIC Controller

The SPI module is available with a number of the PIC compliant MCUs. The mikroC PRO for PIC provides a library (driver) for working with mikroElektronika's CANSPI Add-on boards (with MCP2515 or MCP2510) via SPI interface.

The CAN is a very robust protocol that has error detection and signalization, self–checking and fault confinement. Faulty CAN data and remote frames are re-transmitted automatically, similar to the Ethernet.

In the mikroC PRO for PIC, each routine of the CAN library has its own CANSPI counterpart with identical syntax. For more information on Controller Area Network, consult the CAN Library. Note that an effective communication speed depends on SPI and certainly is slower than "real" CAN.

Data transfer rates depend on distance. For example, 1 Mbit/s can be achieved at network lengths below 40m while 250 Kbit/s can be achieved at network lengths below 250m. The greater distance the lower maximum bitrate that can be achieved. The lowest bitrate defined by the standard is 200Kbit/s. Cables used are shielded twisted pairs.

CAN supports two message formats:

Standard format, with 11 identifier bits and
Extended format, with 29 identifier bits

Connect CAN Protocol with PIC

The mikroC PRO for PIC provides a library (driver) for working with the CAN module.

Data transfer rates depends on the distance. For example, 1 Mbit/s can be achieved at network lengths below 40m while 250 Kbit/s can be achieved at network lengths below 250m. The greater distance the lower maximum bitrate that can be achieved. The lowest bitrate defined by the standard is 200Kbit/s. Cables used are shielded twisted pairs.

CAN supports two message formats:

Standard format, with 11 identifier bits, and
Extended format, with 29 identifier bits

Important :

Consult the CAN standard about CAN bus termination resistance.

Connect ADC with PIC16F877

ADC (Analog to Digital Converter) module is available with a number of PIC MCU modules. ADC is an electronic circuit that converts continuous signals to discrete digital numbers. ADC Library provides you a comfortable work with the module.

Library Routines

ADC_Init
ADC_Get_Sample
ADC_Read

Control LED Light brightness using PWM

CMO module is available with a number of AVR MCUs. mikroC PRO for AVR provides library which simplifies using PWM HW Module.

Important :

AVR MCUs require you to specify the module you want to use. To select the desired PWM, simply change the letter x in the prototype for a number from 1 to 2. Number of UART modules per MCU differs from chip to chip. Please, read the appropriate datasheet before utilizing this library.

For the XMEGA family of MCUs change the xn in the routine prototype with C0, C1, D0, D1, E0, E1, F0 or F1 (MCU dependent).
For better understanding of PWM module it would be best to start with the example provided in Examples folder of our mikroC PRO for AVR compiler.
When you select a MCU, mikroC PRO for AVR automatically loads the correct PWM library (or libraries), which can be verified by looking at the Library Manager.
PWM library handles and initializes the PWM module on the given AVR MCU, but it is up to user to set the correct pins as PWM output, this topic will be covered later in this section.
mikroC PRO for AVR does not support enhanced PWM modules.