pic24hj256gp210 course 2015-09-23

PIC24HJ256GP210

Prajin Palangsantikulpresentation v0.01

Date 2015/09/23

PIC24HJ256GP210

• ไมม่ี USB

9/23/2015 2Prajin Palangsantikul (www.appsofttech.com)

PIC24 Programming

• Include Head file (.h)

– #include <p24Hxxxx.h>

• Configuration Bits• Configuration Bits

– C:\Program Files(x86)\Microchip\xc16\v1.24\docs\ config_docs\24HJ256GP210.htm

• Configure Oscillator Clock

– oscConfig()


1.I/O Ports: What?


1.I/O Ports: What?

• Parallel I/O (PIO) Ports

– The voltage on a digital input pin can be between -

0.3V to 5.6V

• Open-Drain Configuration• Open-Drain Configuration

– This is controlled by the Open-Drain Control

register, ODCx, associated with each port.

– The open-drain feature allows the generation of

outputs higher than VDD(e.g., 5V) on any desired

digital only pins by using external pull-up resistors


1.I/O Ports: What?

• Configuring Analog Port Pins

– The use of the ADxPCFGH, ADxPCFGL and TRIS registers control the operation of the Analog-to-Digital port pins.

• I/O Port Write/Read Timing• I/O Port Write/Read Timing

– One instruction cycle is required between a port direction change or port write operation and a read operation of the same port. Typically, this instruction would be a NOP.

• Input Change Notification


1.I/O Ports: What?

• Input Change Notification

– Depending on the device pin count, there are up

to 24 external signals (CN0 through CN23) that

can be selected (enabled) for generating an can be selected (enabled) for generating an

interrupt request on a change-of-state.

– There are four control registers associated with

the CN module.

• The CNEN1 and CNEN2

• The CNPU1 and CNPU2


1.I/O Ports: Control Register

• TRISx: Data Direction register

• PORTx: I/O Port register

• LATx: I/O Latch register

• ODCx: Open-Drain control register• ODCx: Open-Drain control register

– The open-drain feature allows the generation of

outputs higher than VDD(e.g., 5V) on any desired

digital only pins by using external pull-up resistors.


1.I/O Ports: The Change Notification (CN) pins


1.I/O Ports: CN Configuration and Operation

1. Set TRISx, digital input

2. Set CEN1/CEN2, Enable Interrupt

3. Set CNPU1/CNPU2, On the weak pull-up

4. Clear CNIF (IFSx register), Clear interrupt flag4. Clear CNIF (IFSx register), Clear interrupt flag

5. Select CNIP<2:0> (IPCx register), Interrupt

priority

6. Set CNIE (IECx register), Enable Interrupt


1.I/O Ports: Peripheral Libraries

• C:\Program Files (x86)\Microchip\xc16\v1.24\

docs\periph_libs\16-bit Peripheral

Libraries.htm

– เลือก PIC24H– เลือก PIC24H


1.I/O Ports: Examples

• Input/Output

– LAB_02_Blink.C Output

– LAB_02_SW.C Input

• Input Change Notification (Interrupt)• Input Change Notification (Interrupt)

– LAB_04_CN5_6.C CNx

• External Interrupt

– LAB_04_INT3.C INTx


LAB_04_CN5_6

9/23/2015

LAB_04_CN5_6

(RB3/CN5, RB4/CN6)

17Prajin Palangsantikul (www.appsofttech.com)

LAB_04_INT3

9/23/2015

LAB_04_INT3

(RA14/INT3)


2.Timers

• Type A timer

– Timer1

• Type B timer

– Timer2, Timer4, Timer6 and Timer8– Timer2, Timer4, Timer6 and Timer8

• Type C timer

– Timer3, Timer5, Timer7 and Timer9


2.Timers: Control Register

• TMRx

– 16-bit Timer Count register

• PRx

– 16-bit Timer Period register associated with the – 16-bit Timer Period register associated with the

timer

• TxCON

– 16-bit Timer Control register associated with the

timer


2.Timers: Interrupt Control Register

• Interrupt Enable Control bit (TxIE)

• Interrupt Flag Status bit (TxIF)

• Interrupt Priority Control bits (TxIP<2:0>)


2.Timers: Type A Timer


2.Timers: Type B Timer


2.Timers: Type C Timer


2.Timers: Timer1 (Type A Timer)

• Timer1 operate in three modes

– 16-bit Timer

– 16-bit Synchronous Counter

– 16-bit Asynchronous Counter– 16-bit Asynchronous Counter


2.Timers: Type A Timer Control Register

• T1CON register


2.Timers: Tick

• T = 1/f

= 1/(FOSC/2)/prescale value

= 1/(40MHz/2)/256

= 0.013 ms= 0.013 ms

• 1ms?

0.013ms = 1 Tick

1ms = 1/0.013

= 76


2.Timers: To configure Timer1 for operation

1. Set the TON bit (= 1) in the T1CON register.

2. Select the timer prescaler ratio using the TCKPS<1:0> bits in

the T1CON register.

3. Set the Clock and Gating modes using the TCS and TGATE

bits in the T1CON register.bits in the T1CON register.

4. Set or clear the TSYNC bit in T1CON to select synchronous or

asynchronous operation.

5. Load the timer period value into the PR1 register.

6. If interrupts are required, set the interrupt enable bit, T1IE.

Use the priority bits, T1IP<2:0>, to set the interrupt priority.


2.Timers: 16-Bit Timer1

• Timer Mode

– LAB_05_Timer.c

• Counter Mode

– LAB_05_Counter.c– LAB_05_Counter.c


2.Timers: Type B/Type C


2.Timers: 32-Bit Timer Access

• the most significant word (msw)

• the least significant word (lsw)


2.Timers: 32-Bit Timer

• Timer Mode

– LAB_05_Timer32.c

• Counter Mode

– LAB_05_Counter32.c– LAB_05_Counter32.c


3. 10-Bit Analog-to-Digital Converter (ADC)

• The PIC24H family devices have up to 32 A/D

input channels.

• These devices also have up to two ADC

modules (ADCx, where x = 1 or 2), each with modules (ADCx, where x = 1 or 2), each with

its own set of Special Function Registers

(SFRs).


3. 10-Bit Analog-to-Digital Converter (ADC)

• The 10-bit or 12-bit Operation Mode (AD12B)

bit in the ADCx Control 1(ADxCON1) register

allows each of the ADC modules to be

configured by the user application as either a configured by the user application as either a

10-bit, 4 Sample/Hold (S/H) ADC (default

configuration) or a 12-bit, 1 Sample/Hold ADC.


• LAB_07_ADC_AN2.c


4.Input Capture


4.Input Capture: Input Capture Event Generation


4.Input Capture: Timer Value Capture


4.Input Capture: Example

• Input Capture

– LAB_08_InputCapture.C (See: Figure12-5)


5.Output Compare


5.Output Compare: operating modes

• Active Low One-Shot mode

• Active High One-Shot mode

• Toggle mode

• Delayed One-Shot mode• Delayed One-Shot mode

• Continuous Pulse mode

• PWM mode

– without fault protection

– with fault protection


5.Output Compare:


5.Output Compare: Output Compare Registers

• OCxCON

– Output Compare Control register

• OCxR

– Output Compare register– Output Compare register

• OCxRS

– Secondary Output Compare register


5.Output Compare: Examples

• Toggle mode (See: Figure13-5)

– LAB_09_OutputCompare_Toggle.C

• PWM mode without fault protection • PWM mode without fault protection

(See: Figure13-12)

– LAB_09_OutputCompare_PWM.C


6. Serial Peripheral Interface (SPI)

• The SPI module is a full duplex synchronous

serial interface useful for communicating with

other peripherals or microcontrollers in

master/slave relationship and it can transfer master/slave relationship and it can transfer

data over short distances at high speeds.



• The peripheral devices may be serial

EEPROMs, shift registers, display drivers,

analog-to-digital converters, etc.

• The SPI module is compatible with Motorola’s • The SPI module is compatible with Motorola’s

SPI and SIOP interfaces.



• The SPI serial interface consists of four pins,

which are further sub-divided into data and

control lines:

– Data lines:– Data lines:

• MOSI – Master Data Output, Slave Data Input

• MISO – Master Data Input, Slave Data Output

– Control lines:

• SCLK – Serial Clock

• /SS – Slave Select (no addressing)


LAB_10_74HC595.c

• PIC24H 74HC595

• -------------------------------

• SDO1/RF8 -> DS pin

• SCK1/RF6 -> SH_CP pin• SCK1/RF6 -> SH_CP pin

• RF5 -> ST_CP pin


LAB_10_74HC595.c

PIC24H

SDO1/RF8


SDO1/RF8

RF5

SCK1/RF6

7. Inter-Integrated Circuit I2C



• 256K I2C™ Serial EEPROM



EEPROM EEPROM 2424LCxxxxLCxxxx PCFPCF85748574A I/O expanderA I/O expander

9/23/2015

PCFPCF8591 88591 8bit A/D and D/Abit A/D and D/ADSDS1307 1307 RealReal--Time ClockTime Clock


LAB_11_PCF8574A.c

• PIC24 PCF8574A

• --------------------------

• xx -> SDA

• xx -> SCL• xx -> SCL

• P0-P7 ตอ่ LED 8 ดวง


LAB_11_PCF8574A.c

xx

xx

PIC24H

9/23/2015

xx


SD card/FAT32 (เพิ�มเติม)


Ref.

• www.microchip.com

• PIC24HJXXXGP-X06-X08-X10 datasheet

• ETT manPIC32-START-KIT manual

9/23/2015 Prajin Palangsantikul (www.appsofttech.com) 67

pic24hj256gp210 course 2015-09-23

Documents