Simple Atmega TWI echo slave
This commit is contained in:
parent
121a0408c5
commit
1757c1a550
20
TWI/TWI.atsln
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20
TWI/TWI.atsln
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Microsoft Visual Studio Solution File, Format Version 11.00
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# Atmel Studio Solution File, Format Version 11.00
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Project("{E66E83B9-2572-4076-B26E-6BE79FF3018A}") = "TWI", "TWI\TWI.cppproj", "{46349E95-E546-4344-8620-E0A6F53C8C82}"
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EndProject
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Global
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GlobalSection(SolutionConfigurationPlatforms) = preSolution
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Debug|AVR = Debug|AVR
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Release|AVR = Release|AVR
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EndGlobalSection
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GlobalSection(ProjectConfigurationPlatforms) = postSolution
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{46349E95-E546-4344-8620-E0A6F53C8C82}.Debug|AVR.ActiveCfg = Debug|AVR
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{46349E95-E546-4344-8620-E0A6F53C8C82}.Debug|AVR.Build.0 = Debug|AVR
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{46349E95-E546-4344-8620-E0A6F53C8C82}.Release|AVR.ActiveCfg = Release|AVR
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{46349E95-E546-4344-8620-E0A6F53C8C82}.Release|AVR.Build.0 = Release|AVR
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EndGlobalSection
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GlobalSection(SolutionProperties) = preSolution
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HideSolutionNode = FALSE
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EndGlobalSection
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EndGlobal
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43
TWI/TWI/Pin.cpp
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43
TWI/TWI/Pin.cpp
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#include "Pin.h"
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#include "environment.h"
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#include <util/delay.h>
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Pin::Pin(volatile uint8_t *port, uint8_t pin)
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: m_port(port)
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, m_pin(pin)
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{
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}
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void Pin::pulse()
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{
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*m_port |= (1 << m_pin);
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*m_port &= ~(1 << m_pin);
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}
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void Pin::set(bool value)
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{
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if (value == true)
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{
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*m_port |= (1 << m_pin);
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}
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else
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{
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*m_port &= ~(1 << m_pin);
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}
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}
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void Pin::toggle()
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{
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*m_port ^= (1 << m_pin);
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}
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void Pin::blink()
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{
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*m_port |= (1 << m_pin);
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_delay_ms(50);
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*m_port &= ~(1 << m_pin);
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}
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19
TWI/TWI/Pin.h
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19
TWI/TWI/Pin.h
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#pragma once
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#include <avr/io.h>
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class Pin
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{
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private:
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volatile uint8_t *m_port;
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uint8_t m_pin;
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public:
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Pin(volatile uint8_t *port, uint8_t pin);
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void pulse();
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void set(bool value);
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void toggle();
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void blink();
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};
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63
TWI/TWI/TWI.cpp
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63
TWI/TWI/TWI.cpp
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#include "environment.h"
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#include <avr/io.h>
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#include <util/delay.h>
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#include <avr/interrupt.h>
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#include <util/twi.h>
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#include "Pin.h"
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void I2C_init(uint8_t address)
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{
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// load address into TWI address register
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TWAR = (address << 1);
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// set the TWCR to enable address matching and enable TWI, clear TWINT, enable TWI interrupt
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TWCR = (1<<TWIE) | (1<<TWEA) | (1<<TWEN);
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}
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void I2C_stop(void)
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{
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// clear acknowledge and enable bits
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TWCR &= ~( (1<<TWEA) | (1<<TWEN) );
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}
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volatile uint8_t dataBuffer;
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ISR(TWI_vect)
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{
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switch (TW_STATUS)
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{
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case TW_SR_SLA_ACK: // own address has been acknowledged
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// clear TWI interrupt flag, prepare to receive next byte and acknowledge
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TWCR |= (1<<TWIE) | (1<<TWINT) | (1<<TWEA) | (1<<TWEN);
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break;
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case TW_SR_DATA_ACK:
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dataBuffer = TWDR;
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TWCR |= (1<<TWIE) | (1<<TWINT) | (1<<TWEA) | (1<<TWEN);
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break;
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case TW_ST_SLA_ACK:
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TWDR = dataBuffer + 1;
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TWCR |= (1<<TWIE) | (1<<TWINT) | (0<<TWEA) | (1<<TWEN);
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break;
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default:
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// if none of the above apply prepare TWI to be addressed again
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TWCR |= (1<<TWIE) | (1<<TWEA) | (1<<TWEN);
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}
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}
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int main(void)
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{
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DDRD |= (1 << PD6);
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Pin statusLed(&PORTD, PD6);
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statusLed.set(false);
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I2C_init(0x23);
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sei();
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while(1)
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{
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}
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}
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150
TWI/TWI/TWI.cppproj
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150
TWI/TWI/TWI.cppproj
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<?xml version="1.0" encoding="utf-8"?>
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<Project DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
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<PropertyGroup>
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<SchemaVersion>2.0</SchemaVersion>
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<ProjectVersion>6.2</ProjectVersion>
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<ToolchainName>com.Atmel.AVRGCC8.CPP</ToolchainName>
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<ProjectGuid>{46349e95-e546-4344-8620-e0a6f53c8c82}</ProjectGuid>
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<avrdevice>ATmega32</avrdevice>
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<avrdeviceseries>none</avrdeviceseries>
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<OutputType>Executable</OutputType>
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<Language>CPP</Language>
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<OutputFileName>$(MSBuildProjectName)</OutputFileName>
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<OutputFileExtension>.elf</OutputFileExtension>
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<OutputDirectory>$(MSBuildProjectDirectory)\$(Configuration)</OutputDirectory>
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<AssemblyName>TWI</AssemblyName>
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<Name>TWI</Name>
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<RootNamespace>TWI</RootNamespace>
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<ToolchainFlavour>Native</ToolchainFlavour>
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<KeepTimersRunning>true</KeepTimersRunning>
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<OverrideVtor>false</OverrideVtor>
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<CacheFlash>true</CacheFlash>
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<ProgFlashFromRam>true</ProgFlashFromRam>
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<RamSnippetAddress>0x20000000</RamSnippetAddress>
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<UncachedRange />
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<preserveEEPROM>true</preserveEEPROM>
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<OverrideVtorValue>exception_table</OverrideVtorValue>
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<BootSegment>2</BootSegment>
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<eraseonlaunchrule>0</eraseonlaunchrule>
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<AsfFrameworkConfig>
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<framework-data xmlns="">
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<options />
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<configurations />
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<files />
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<documentation help="" />
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<offline-documentation help="" />
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<dependencies>
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<content-extension eid="atmel.asf" uuidref="Atmel.ASF" version="3.29.0" />
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</dependencies>
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</framework-data>
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</AsfFrameworkConfig>
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<avrtool>com.atmel.avrdbg.tool.stk500</avrtool>
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<com_atmel_avrdbg_tool_stk500>
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<ToolOptions>
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<InterfaceProperties>
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<IspClock>125000</IspClock>
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</InterfaceProperties>
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<InterfaceName>ISP</InterfaceName>
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</ToolOptions>
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<ToolType>com.atmel.avrdbg.tool.stk500</ToolType>
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<ToolNumber>
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</ToolNumber>
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<ToolName>STK500</ToolName>
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</com_atmel_avrdbg_tool_stk500>
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<avrtoolinterface>ISP</avrtoolinterface>
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</PropertyGroup>
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<PropertyGroup Condition=" '$(Configuration)' == 'Release' ">
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<ToolchainSettings>
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<AvrGccCpp>
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<avrgcc.common.outputfiles.hex>True</avrgcc.common.outputfiles.hex>
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<avrgcc.common.outputfiles.lss>True</avrgcc.common.outputfiles.lss>
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<avrgcc.common.outputfiles.eep>True</avrgcc.common.outputfiles.eep>
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<avrgcc.common.outputfiles.srec>True</avrgcc.common.outputfiles.srec>
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<avrgcc.common.outputfiles.usersignatures>False</avrgcc.common.outputfiles.usersignatures>
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<avrgcc.compiler.general.ChangeDefaultCharTypeUnsigned>True</avrgcc.compiler.general.ChangeDefaultCharTypeUnsigned>
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<avrgcc.compiler.general.ChangeDefaultBitFieldUnsigned>True</avrgcc.compiler.general.ChangeDefaultBitFieldUnsigned>
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<avrgcc.compiler.symbols.DefSymbols>
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<ListValues>
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<Value>NDEBUG</Value>
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</ListValues>
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</avrgcc.compiler.symbols.DefSymbols>
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<avrgcc.compiler.optimization.level>Optimize for size (-Os)</avrgcc.compiler.optimization.level>
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<avrgcc.compiler.optimization.PackStructureMembers>True</avrgcc.compiler.optimization.PackStructureMembers>
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<avrgcc.compiler.optimization.AllocateBytesNeededForEnum>True</avrgcc.compiler.optimization.AllocateBytesNeededForEnum>
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<avrgcc.compiler.warnings.AllWarnings>True</avrgcc.compiler.warnings.AllWarnings>
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<avrgcccpp.compiler.general.ChangeDefaultCharTypeUnsigned>True</avrgcccpp.compiler.general.ChangeDefaultCharTypeUnsigned>
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<avrgcccpp.compiler.general.ChangeDefaultBitFieldUnsigned>True</avrgcccpp.compiler.general.ChangeDefaultBitFieldUnsigned>
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<avrgcccpp.compiler.symbols.DefSymbols>
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<ListValues>
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<Value>NDEBUG</Value>
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</ListValues>
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</avrgcccpp.compiler.symbols.DefSymbols>
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<avrgcccpp.compiler.optimization.level>Optimize for size (-Os)</avrgcccpp.compiler.optimization.level>
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<avrgcccpp.compiler.optimization.PackStructureMembers>True</avrgcccpp.compiler.optimization.PackStructureMembers>
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<avrgcccpp.compiler.optimization.AllocateBytesNeededForEnum>True</avrgcccpp.compiler.optimization.AllocateBytesNeededForEnum>
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<avrgcccpp.compiler.warnings.AllWarnings>True</avrgcccpp.compiler.warnings.AllWarnings>
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<avrgcccpp.linker.libraries.Libraries>
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<ListValues>
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<Value>libm</Value>
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</ListValues>
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</avrgcccpp.linker.libraries.Libraries>
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</AvrGccCpp>
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</ToolchainSettings>
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</PropertyGroup>
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<PropertyGroup Condition=" '$(Configuration)' == 'Debug' ">
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<ToolchainSettings>
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<AvrGccCpp>
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<avrgcc.common.outputfiles.hex>True</avrgcc.common.outputfiles.hex>
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<avrgcc.common.outputfiles.lss>True</avrgcc.common.outputfiles.lss>
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<avrgcc.common.outputfiles.eep>True</avrgcc.common.outputfiles.eep>
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<avrgcc.common.outputfiles.srec>True</avrgcc.common.outputfiles.srec>
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<avrgcc.common.outputfiles.usersignatures>False</avrgcc.common.outputfiles.usersignatures>
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<avrgcc.compiler.general.ChangeDefaultCharTypeUnsigned>True</avrgcc.compiler.general.ChangeDefaultCharTypeUnsigned>
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<avrgcc.compiler.general.ChangeDefaultBitFieldUnsigned>True</avrgcc.compiler.general.ChangeDefaultBitFieldUnsigned>
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<avrgcc.compiler.symbols.DefSymbols>
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<ListValues>
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<Value>DEBUG</Value>
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</ListValues>
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</avrgcc.compiler.symbols.DefSymbols>
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<avrgcc.compiler.optimization.level>Optimize (-O1)</avrgcc.compiler.optimization.level>
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<avrgcc.compiler.optimization.PackStructureMembers>True</avrgcc.compiler.optimization.PackStructureMembers>
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<avrgcc.compiler.optimization.AllocateBytesNeededForEnum>True</avrgcc.compiler.optimization.AllocateBytesNeededForEnum>
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<avrgcc.compiler.optimization.DebugLevel>Default (-g2)</avrgcc.compiler.optimization.DebugLevel>
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<avrgcc.compiler.warnings.AllWarnings>True</avrgcc.compiler.warnings.AllWarnings>
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<avrgcccpp.compiler.general.ChangeDefaultCharTypeUnsigned>True</avrgcccpp.compiler.general.ChangeDefaultCharTypeUnsigned>
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<avrgcccpp.compiler.general.ChangeDefaultBitFieldUnsigned>True</avrgcccpp.compiler.general.ChangeDefaultBitFieldUnsigned>
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<avrgcccpp.compiler.symbols.DefSymbols>
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<ListValues>
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<Value>DEBUG</Value>
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</ListValues>
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</avrgcccpp.compiler.symbols.DefSymbols>
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<avrgcccpp.compiler.optimization.level>Optimize (-O1)</avrgcccpp.compiler.optimization.level>
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<avrgcccpp.compiler.optimization.PackStructureMembers>True</avrgcccpp.compiler.optimization.PackStructureMembers>
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||||||
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<avrgcccpp.compiler.optimization.AllocateBytesNeededForEnum>True</avrgcccpp.compiler.optimization.AllocateBytesNeededForEnum>
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<avrgcccpp.compiler.optimization.DebugLevel>Default (-g2)</avrgcccpp.compiler.optimization.DebugLevel>
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<avrgcccpp.compiler.warnings.AllWarnings>True</avrgcccpp.compiler.warnings.AllWarnings>
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<avrgcccpp.linker.libraries.Libraries>
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<ListValues>
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||||||
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<Value>libm</Value>
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</ListValues>
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</avrgcccpp.linker.libraries.Libraries>
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<avrgcccpp.assembler.debugging.DebugLevel>Default (-Wa,-g)</avrgcccpp.assembler.debugging.DebugLevel>
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</AvrGccCpp>
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</ToolchainSettings>
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</PropertyGroup>
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<ItemGroup>
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<Compile Include="environment.h">
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<SubType>compile</SubType>
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</Compile>
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<Compile Include="Pin.cpp">
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<SubType>compile</SubType>
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</Compile>
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<Compile Include="Pin.h">
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<SubType>compile</SubType>
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</Compile>
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<Compile Include="TWI.cpp">
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<SubType>compile</SubType>
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</Compile>
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</ItemGroup>
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<Import Project="$(AVRSTUDIO_EXE_PATH)\\Vs\\Compiler.targets" />
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</Project>
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3
TWI/TWI/environment.h
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3
TWI/TWI/environment.h
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#pragma once
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#define F_CPU 12000000
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