CP316 USART, SPI, and I 2 C Communication

CP316, SPI, and I 2 C Communication Wilfrid Laurier University February 12, 2013

QwikFlash modules

QwikFlash modules ramifications???

QwikFlash modules ramifications??? interrupts; transmit and receive

QwikFlash modules ramifications??? interrupts; transmit and receive Sections 6.4.5 to 6.4.7

QwikFlash modules ramifications??? interrupts; transmit and receive Sections 6.4.5 to 6.4.7 Section 8.2

2 wires, one-to-one

2 wires, one-to-one EIA232 (RS232)

2 wires, one-to-one EIA232 (RS232) Section 9.3

2 wires, one-to-one EIA232 (RS232) Section 9.3 registers

2 wires, one-to-one EIA232 (RS232) Section 9.3 registers Section 9.4.1

2 wires, one-to-one EIA232 (RS232) Section 9.3 registers Section 9.4.1 asynchronous mode

2 wires, one-to-one EIA232 (RS232) Section 9.3 registers Section 9.4.1 asynchronous mode Section 9.4.2

2 wires, one-to-one EIA232 (RS232) Section 9.3 registers Section 9.4.1 asynchronous mode Section 9.4.2 asynchronous mode to EIA232

2 wires, one-to-one EIA232 (RS232) Section 9.3 registers Section 9.4.1 asynchronous mode Section 9.4.2 asynchronous mode to EIA232 Section 9.4.5

2 wires, one-to-one EIA232 (RS232) Section 9.3 registers Section 9.4.1 asynchronous mode Section 9.4.2 asynchronous mode to EIA232 Section 9.4.5 Section 16.0

EIA232 summary

EIA232 summary 2 wires (+ ground), one-to-one

EIA232 summary 2 wires (+ ground), one-to-one TX

EIA232 summary 2 wires (+ ground), one-to-one TX RX

EIA232 summary 2 wires (+ ground), one-to-one TX RX Fixed baud rate, common to both devices

EIA232 summary 2 wires (+ ground), one-to-one TX RX Fixed baud rate, common to both devices At least one start bit

EIA232 summary 2 wires (+ ground), one-to-one TX RX Fixed baud rate, common to both devices At least one start bit At least one stop bit

EIA232 summary 2 wires (+ ground), one-to-one TX RX Fixed baud rate, common to both devices At least one start bit At least one stop bit voltage levels not TTL; inverted (normally)

EIA232 summary 2 wires (+ ground), one-to-one TX RX Fixed baud rate, common to both devices At least one start bit At least one stop bit voltage levels not TTL; inverted (normally) (except TTL serial devices)

EIA232 summary 2 wires (+ ground), one-to-one TX RX Fixed baud rate, common to both devices At least one start bit At least one stop bit voltage levels not TTL; inverted (normally) (except TTL serial devices) packets are single characters

Qwikflash UART connections

2 modes; SPI and I 2 C

2 modes; SPI and I 2 C Section 15.0-15.2

SPI 3 wires +chip select, master-slave

SPI 3 wires +chip select, master-slave overview

SPI 3 wires +chip select, master-slave overview Section 10.2

SPI 3 wires +chip select, master-slave overview Section 10.2 SPI registers

SPI 3 wires +chip select, master-slave overview Section 10.2 SPI registers Section 10.3.1

SPI 3 wires +chip select, master-slave overview Section 10.2 SPI registers Section 10.3.1 operation

SPI 3 wires +chip select, master-slave overview Section 10.2 SPI registers Section 10.3.1 operation Sections 10.3.2 to 10.3.5

SPI 3 wires +chip select, master-slave overview Section 10.2 SPI registers Section 10.3.1 operation Sections 10.3.2 to 10.3.5 Section 15.3

SPI 3 wires +chip select, master-slave overview Section 10.2 SPI registers Section 10.3.1 operation Sections 10.3.2 to 10.3.5 Section 15.3 QwikFlash MAX522 DAC

SPI summary

SPI summary 3 wires (+ ground), one-to-many

SPI summary 3 wires (+ ground), one-to-many SCLK (from master)

SPI summary 3 wires (+ ground), one-to-many SCLK (from master) SDO (serial data out)

SPI summary 3 wires (+ ground), one-to-many SCLK (from master) SDO (serial data out) SDI (serial data in)

SPI summary 3 wires (+ ground), one-to-many SCLK (from master) SDO (serial data out) SDI (serial data in) CS for each device, generated by master

SPI summary 3 wires (+ ground), one-to-many SCLK (from master) SDO (serial data out) SDI (serial data in) CS for each device, generated by master data transmission rate set by SCLK

SPI summary 3 wires (+ ground), one-to-many SCLK (from master) SDO (serial data out) SDI (serial data in) CS for each device, generated by master data transmission rate set by SCLK packets are single characters

Qwikflash SPI connections

I 2 C 2 wires, master-multiple slave

I 2 C 2 wires, master-multiple slave overview

I 2 C 2 wires, master-multiple slave overview Section 11.2

I 2 C 2 wires, master-multiple slave overview Section 11.2 I 2 C module

I 2 C 2 wires, master-multiple slave overview Section 11.2 I 2 C module Sections 11.3 to 11.6

I 2 C 2 wires, master-multiple slave overview Section 11.2 I 2 C module Sections 11.3 to 11.6 Section 15.4

I 2 C summary

I 2 C summary 2 wires (+ ground), one-to-many

I 2 C summary 2 wires (+ ground), one-to-many SCL (from master)

I 2 C summary 2 wires (+ ground), one-to-many SCL (from master) SDA (serial data)

I 2 C summary 2 wires (+ ground), one-to-many SCL (from master) SDA (serial data) data transmission rate set by SCL

I 2 C summary 2 wires (+ ground), one-to-many SCL (from master) SDA (serial data) data transmission rate set by SCL address for each device, preset (but possibly programmable)

I 2 C summary 2 wires (+ ground), one-to-many SCL (from master) SDA (serial data) data transmission rate set by SCL address for each device, preset (but possibly programmable) packets are complex; address of recipient, read or write, data (variable number of bytes)

Qwikflash I 2 C connections

overview

overview reasons

overview reasons NIB

PORT configuration

PORT configuration macro or subroutine?

PORT configuration macro or subroutine? Initiallization

PORT configuration macro or subroutine? Initiallization macro or subroutine?

PORT configuration macro or subroutine? Initiallization macro or subroutine? Write to device

PORT configuration macro or subroutine? Initiallization macro or subroutine? Write to device macro or subroutine?

PORT configuration macro or subroutine? Initiallization macro or subroutine? Write to device macro or subroutine? Read from device

PORT configuration macro or subroutine? Initiallization macro or subroutine? Write to device macro or subroutine? Read from device macro or subroutine?