Compare commits
3 Commits
| Author | SHA1 | Date | |
|---|---|---|---|
| 3eb298053b | |||
| e82fb9971e | |||
| 4075cb4e63 |
3
.gitmodules
vendored
Normal file
3
.gitmodules
vendored
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@ -0,0 +1,3 @@
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|||||||
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[submodule "i2c/i2c"]
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path = i2c/i2c
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url = git@git.blackmark.me:avr/i2c.git
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2
LICENSE
2
LICENSE
@ -1,6 +1,6 @@
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|||||||
MIT License
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MIT License
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||||||
|
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||||||
Copyright (c) 2019 BlackMark
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Copyright (c) 2020 BlackMark
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||||||
Permission is hereby granted, free of charge, to any person obtaining a copy
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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of this software and associated documentation files (the "Software"), to deal
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|||||||
93
hardware.hpp
93
hardware.hpp
@ -1,93 +0,0 @@
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#pragma once
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#include <stdint.h>
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#include <util/twi.h>
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namespace i2c {
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#if defined(__AVR_ATmega1284P__)
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enum class Prescaler {
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PRESCALER_1 = 0b00,
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PRESCALER_4 = 0b01,
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PRESCALER_16 = 0b10,
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PRESCALER_64 = 0b11,
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};
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template <Prescaler Pres, uint32_t Clock>
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class Hardware {
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public:
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static void init()
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{
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TWSR = static_cast<uint8_t>(Pres);
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TWBR = calcClock();
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}
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template <uint8_t Addr>
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static bool start(bool read)
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{
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TWCR = (1 << TWINT) | (1 << TWSTA) | (1 << TWEN);
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while (!(TWCR & (1 << TWINT)))
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;
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uint8_t status = TW_STATUS & 0xF8;
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if (status != TW_START && status != TW_REP_START)
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return false;
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TWDR = (Addr << 1) | read;
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TWCR = (1 << TWINT) | (1 << TWEN);
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while (!(TWCR & (1 << TWINT)))
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;
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status = TW_STATUS & 0xF8;
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if (status != TW_MT_SLA_ACK && status != TW_MR_SLA_ACK)
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return false;
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return true;
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}
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static bool write(uint8_t data)
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{
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TWDR = data;
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TWCR = (1 << TWINT) | (1 << TWEN);
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while (!(TWCR & (1 << TWINT)))
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;
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uint8_t status = TW_STATUS & 0xF8;
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if (status != TW_MT_DATA_ACK)
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return false;
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return true;
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}
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template <bool LastByte = false>
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static uint8_t read()
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{
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TWCR = (1 << TWINT) | (1 << TWEN) | (!LastByte << TWEA);
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while (!(TWCR & (1 << TWINT)))
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;
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return TWDR;
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}
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static void stop()
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{
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TWCR = (1 << TWINT) | (1 << TWEN) | (1 << TWSTO);
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while (TWCR & (1 << TWSTO))
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;
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}
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private:
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static constexpr uint8_t calcClock()
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{
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return ((F_CPU / Clock) - 16) / 2;
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}
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};
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#endif
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} // namespace i2c
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22
i2c.atsln
Normal file
22
i2c.atsln
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@ -0,0 +1,22 @@
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||||||
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Microsoft Visual Studio Solution File, Format Version 12.00
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# Atmel Studio Solution File, Format Version 11.00
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VisualStudioVersion = 14.0.23107.0
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MinimumVisualStudioVersion = 10.0.40219.1
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||||||
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Project("{E66E83B9-2572-4076-B26E-6BE79FF3018A}") = "i2c", "i2c\i2c.cppproj", "{DCE6C7E3-EE26-4D79-826B-08594B9AD897}"
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EndProject
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||||||
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Global
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||||||
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GlobalSection(SolutionConfigurationPlatforms) = preSolution
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Debug|AVR = Debug|AVR
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||||||
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Release|AVR = Release|AVR
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||||||
|
EndGlobalSection
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||||||
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GlobalSection(ProjectConfigurationPlatforms) = postSolution
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||||||
|
{DCE6C7E3-EE26-4D79-826B-08594B9AD897}.Debug|AVR.ActiveCfg = Debug|AVR
|
||||||
|
{DCE6C7E3-EE26-4D79-826B-08594B9AD897}.Debug|AVR.Build.0 = Debug|AVR
|
||||||
|
{DCE6C7E3-EE26-4D79-826B-08594B9AD897}.Release|AVR.ActiveCfg = Release|AVR
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||||||
|
{DCE6C7E3-EE26-4D79-826B-08594B9AD897}.Release|AVR.Build.0 = Release|AVR
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||||||
|
EndGlobalSection
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||||||
|
GlobalSection(SolutionProperties) = preSolution
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||||||
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HideSolutionNode = FALSE
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||||||
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EndGlobalSection
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||||||
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EndGlobal
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||||||
39
i2c.hpp
39
i2c.hpp
@ -1,39 +0,0 @@
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#pragma once
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#include <stdint.h>
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#include "hardware.hpp"
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namespace i2c {
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||||||
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||||||
template <class Driver>
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struct I2c {
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static void init()
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{
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Driver::init();
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}
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template <uint8_t Addr>
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static bool start(bool read)
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{
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return Driver::template start<Addr>(read);
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}
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||||||
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static bool write(uint8_t data)
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||||||
{
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return Driver::write(data);
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}
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||||||
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||||||
template <bool LastByte = false>
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static uint8_t read()
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||||||
{
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return Driver::template read<LastByte>();
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||||||
}
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||||||
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||||||
static void stop()
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|
||||||
{
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Driver::stop();
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||||||
}
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||||||
};
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||||||
|
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||||||
} // namespace i2c
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4
i2c/clock.hpp
Normal file
4
i2c/clock.hpp
Normal file
@ -0,0 +1,4 @@
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#pragma once
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||||||
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||||||
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#define F_CPU 16000000
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#include <util/delay.h>
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1
i2c/i2c
Submodule
1
i2c/i2c
Submodule
@ -0,0 +1 @@
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|||||||
|
Subproject commit 5c3fb99c1905559f3a01bf18321b570600a3db2e
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||||||
196
i2c/i2c.cppproj
Normal file
196
i2c/i2c.cppproj
Normal file
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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" ToolsVersion="14.0">
|
||||||
|
<PropertyGroup>
|
||||||
|
<SchemaVersion>2.0</SchemaVersion>
|
||||||
|
<ProjectVersion>7.0</ProjectVersion>
|
||||||
|
<ToolchainName>com.Atmel.AVRGCC8.CPP</ToolchainName>
|
||||||
|
<ProjectGuid>dce6c7e3-ee26-4d79-826b-08594b9ad897</ProjectGuid>
|
||||||
|
<avrdevice>ATmega328P</avrdevice>
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||||||
|
<avrdeviceseries>none</avrdeviceseries>
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||||||
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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>
|
||||||
|
<AssemblyName>i2c</AssemblyName>
|
||||||
|
<Name>i2c</Name>
|
||||||
|
<RootNamespace>i2c</RootNamespace>
|
||||||
|
<ToolchainFlavour>avr-g++-9.1.0</ToolchainFlavour>
|
||||||
|
<KeepTimersRunning>true</KeepTimersRunning>
|
||||||
|
<OverrideVtor>false</OverrideVtor>
|
||||||
|
<CacheFlash>true</CacheFlash>
|
||||||
|
<ProgFlashFromRam>true</ProgFlashFromRam>
|
||||||
|
<RamSnippetAddress>0x20000000</RamSnippetAddress>
|
||||||
|
<UncachedRange />
|
||||||
|
<preserveEEPROM>true</preserveEEPROM>
|
||||||
|
<OverrideVtorValue>exception_table</OverrideVtorValue>
|
||||||
|
<BootSegment>2</BootSegment>
|
||||||
|
<ResetRule>0</ResetRule>
|
||||||
|
<eraseonlaunchrule>0</eraseonlaunchrule>
|
||||||
|
<EraseKey />
|
||||||
|
<avrtool>com.atmel.avrdbg.tool.stk500</avrtool>
|
||||||
|
<avrtoolserialnumber />
|
||||||
|
<avrdeviceexpectedsignature>0x1E950F</avrdeviceexpectedsignature>
|
||||||
|
<com_atmel_avrdbg_tool_stk500>
|
||||||
|
<ToolOptions>
|
||||||
|
<InterfaceProperties>
|
||||||
|
<IspClock>125000</IspClock>
|
||||||
|
</InterfaceProperties>
|
||||||
|
<InterfaceName>ISP</InterfaceName>
|
||||||
|
</ToolOptions>
|
||||||
|
<ToolType>com.atmel.avrdbg.tool.stk500</ToolType>
|
||||||
|
<ToolNumber>
|
||||||
|
</ToolNumber>
|
||||||
|
<ToolName>STK500</ToolName>
|
||||||
|
</com_atmel_avrdbg_tool_stk500>
|
||||||
|
<avrtoolinterface>ISP</avrtoolinterface>
|
||||||
|
<avrtoolinterfaceclock>125000</avrtoolinterfaceclock>
|
||||||
|
<AsfFrameworkConfig>
|
||||||
|
<framework-data xmlns="">
|
||||||
|
<options />
|
||||||
|
<configurations />
|
||||||
|
<files />
|
||||||
|
<documentation help="" />
|
||||||
|
<offline-documentation help="" />
|
||||||
|
<dependencies>
|
||||||
|
<content-extension eid="atmel.asf" uuidref="Atmel.ASF" version="3.47.0" />
|
||||||
|
</dependencies>
|
||||||
|
</framework-data>
|
||||||
|
</AsfFrameworkConfig>
|
||||||
|
</PropertyGroup>
|
||||||
|
<PropertyGroup Condition=" '$(Configuration)' == 'Release' ">
|
||||||
|
<ToolchainSettings>
|
||||||
|
<AvrGccCpp>
|
||||||
|
<avrgcc.common.Device>-mmcu=atmega328p</avrgcc.common.Device>
|
||||||
|
<avrgcc.common.outputfiles.hex>True</avrgcc.common.outputfiles.hex>
|
||||||
|
<avrgcc.common.outputfiles.lss>True</avrgcc.common.outputfiles.lss>
|
||||||
|
<avrgcc.common.outputfiles.eep>True</avrgcc.common.outputfiles.eep>
|
||||||
|
<avrgcc.common.outputfiles.srec>True</avrgcc.common.outputfiles.srec>
|
||||||
|
<avrgcc.common.outputfiles.usersignatures>False</avrgcc.common.outputfiles.usersignatures>
|
||||||
|
<avrgcc.compiler.general.ChangeDefaultCharTypeUnsigned>True</avrgcc.compiler.general.ChangeDefaultCharTypeUnsigned>
|
||||||
|
<avrgcc.compiler.general.ChangeDefaultBitFieldUnsigned>True</avrgcc.compiler.general.ChangeDefaultBitFieldUnsigned>
|
||||||
|
<avrgcc.compiler.directories.IncludePaths>
|
||||||
|
<ListValues>
|
||||||
|
<Value>%24(PackRepoDir)\Atmel\ATmega_DFP\1.4.346\include</Value>
|
||||||
|
</ListValues>
|
||||||
|
</avrgcc.compiler.directories.IncludePaths>
|
||||||
|
<avrgcc.compiler.optimization.AllocateBytesNeededForEnum>True</avrgcc.compiler.optimization.AllocateBytesNeededForEnum>
|
||||||
|
<avrgcc.compiler.warnings.AllWarnings>True</avrgcc.compiler.warnings.AllWarnings>
|
||||||
|
<avrgcc.compiler.warnings.ExtraWarnings>True</avrgcc.compiler.warnings.ExtraWarnings>
|
||||||
|
<avrgcc.compiler.warnings.Pedantic>True</avrgcc.compiler.warnings.Pedantic>
|
||||||
|
<avrgcc.compiler.miscellaneous.OtherFlags>-fno-threadsafe-statics -std=c11</avrgcc.compiler.miscellaneous.OtherFlags>
|
||||||
|
<avrgcccpp.compiler.general.ChangeDefaultCharTypeUnsigned>True</avrgcccpp.compiler.general.ChangeDefaultCharTypeUnsigned>
|
||||||
|
<avrgcccpp.compiler.general.ChangeDefaultBitFieldUnsigned>True</avrgcccpp.compiler.general.ChangeDefaultBitFieldUnsigned>
|
||||||
|
<avrgcccpp.compiler.directories.IncludePaths>
|
||||||
|
<ListValues>
|
||||||
|
<Value>%24(PackRepoDir)\Atmel\ATmega_DFP\1.4.346\include</Value>
|
||||||
|
</ListValues>
|
||||||
|
</avrgcccpp.compiler.directories.IncludePaths>
|
||||||
|
<avrgcccpp.compiler.optimization.AllocateBytesNeededForEnum>True</avrgcccpp.compiler.optimization.AllocateBytesNeededForEnum>
|
||||||
|
<avrgcccpp.compiler.warnings.AllWarnings>True</avrgcccpp.compiler.warnings.AllWarnings>
|
||||||
|
<avrgcccpp.compiler.warnings.Pedantic>True</avrgcccpp.compiler.warnings.Pedantic>
|
||||||
|
<avrgcccpp.compiler.miscellaneous.OtherFlags>-fno-threadsafe-statics -Wextra -std=c++17</avrgcccpp.compiler.miscellaneous.OtherFlags>
|
||||||
|
<avrgcccpp.linker.libraries.Libraries>
|
||||||
|
<ListValues>
|
||||||
|
<Value>libm</Value>
|
||||||
|
</ListValues>
|
||||||
|
</avrgcccpp.linker.libraries.Libraries>
|
||||||
|
<avrgcccpp.assembler.general.IncludePaths>
|
||||||
|
<ListValues>
|
||||||
|
<Value>%24(PackRepoDir)\Atmel\ATmega_DFP\1.4.346\include</Value>
|
||||||
|
</ListValues>
|
||||||
|
</avrgcccpp.assembler.general.IncludePaths>
|
||||||
|
<avrgcc.compiler.symbols.DefSymbols>
|
||||||
|
<ListValues>
|
||||||
|
<Value>NDEBUG</Value>
|
||||||
|
</ListValues>
|
||||||
|
</avrgcc.compiler.symbols.DefSymbols>
|
||||||
|
<avrgcc.compiler.optimization.level>Optimize for size (-Os)</avrgcc.compiler.optimization.level>
|
||||||
|
<avrgcccpp.compiler.symbols.DefSymbols>
|
||||||
|
<ListValues>
|
||||||
|
<Value>NDEBUG</Value>
|
||||||
|
</ListValues>
|
||||||
|
</avrgcccpp.compiler.symbols.DefSymbols>
|
||||||
|
<avrgcccpp.compiler.optimization.level>Optimize for size (-Os)</avrgcccpp.compiler.optimization.level>
|
||||||
|
</AvrGccCpp>
|
||||||
|
</ToolchainSettings>
|
||||||
|
</PropertyGroup>
|
||||||
|
<PropertyGroup Condition=" '$(Configuration)' == 'Debug' ">
|
||||||
|
<ToolchainSettings>
|
||||||
|
<AvrGccCpp>
|
||||||
|
<avrgcc.common.Device>-mmcu=atmega328p</avrgcc.common.Device>
|
||||||
|
<avrgcc.common.outputfiles.hex>True</avrgcc.common.outputfiles.hex>
|
||||||
|
<avrgcc.common.outputfiles.lss>True</avrgcc.common.outputfiles.lss>
|
||||||
|
<avrgcc.common.outputfiles.eep>True</avrgcc.common.outputfiles.eep>
|
||||||
|
<avrgcc.common.outputfiles.srec>True</avrgcc.common.outputfiles.srec>
|
||||||
|
<avrgcc.common.outputfiles.usersignatures>False</avrgcc.common.outputfiles.usersignatures>
|
||||||
|
<avrgcc.compiler.general.ChangeDefaultCharTypeUnsigned>True</avrgcc.compiler.general.ChangeDefaultCharTypeUnsigned>
|
||||||
|
<avrgcc.compiler.general.ChangeDefaultBitFieldUnsigned>True</avrgcc.compiler.general.ChangeDefaultBitFieldUnsigned>
|
||||||
|
<avrgcc.compiler.directories.IncludePaths>
|
||||||
|
<ListValues>
|
||||||
|
<Value>%24(PackRepoDir)\Atmel\ATmega_DFP\1.4.346\include</Value>
|
||||||
|
</ListValues>
|
||||||
|
</avrgcc.compiler.directories.IncludePaths>
|
||||||
|
<avrgcc.compiler.optimization.AllocateBytesNeededForEnum>True</avrgcc.compiler.optimization.AllocateBytesNeededForEnum>
|
||||||
|
<avrgcc.compiler.warnings.AllWarnings>True</avrgcc.compiler.warnings.AllWarnings>
|
||||||
|
<avrgcc.compiler.warnings.ExtraWarnings>True</avrgcc.compiler.warnings.ExtraWarnings>
|
||||||
|
<avrgcc.compiler.warnings.Pedantic>True</avrgcc.compiler.warnings.Pedantic>
|
||||||
|
<avrgcc.compiler.miscellaneous.OtherFlags>-fno-threadsafe-statics -std=c11</avrgcc.compiler.miscellaneous.OtherFlags>
|
||||||
|
<avrgcccpp.compiler.general.ChangeDefaultCharTypeUnsigned>True</avrgcccpp.compiler.general.ChangeDefaultCharTypeUnsigned>
|
||||||
|
<avrgcccpp.compiler.general.ChangeDefaultBitFieldUnsigned>True</avrgcccpp.compiler.general.ChangeDefaultBitFieldUnsigned>
|
||||||
|
<avrgcccpp.compiler.directories.IncludePaths>
|
||||||
|
<ListValues>
|
||||||
|
<Value>%24(PackRepoDir)\Atmel\ATmega_DFP\1.4.346\include</Value>
|
||||||
|
</ListValues>
|
||||||
|
</avrgcccpp.compiler.directories.IncludePaths>
|
||||||
|
<avrgcccpp.compiler.optimization.AllocateBytesNeededForEnum>True</avrgcccpp.compiler.optimization.AllocateBytesNeededForEnum>
|
||||||
|
<avrgcccpp.compiler.warnings.AllWarnings>True</avrgcccpp.compiler.warnings.AllWarnings>
|
||||||
|
<avrgcccpp.compiler.warnings.Pedantic>True</avrgcccpp.compiler.warnings.Pedantic>
|
||||||
|
<avrgcccpp.compiler.miscellaneous.OtherFlags>-fno-threadsafe-statics -Wextra -std=c++17</avrgcccpp.compiler.miscellaneous.OtherFlags>
|
||||||
|
<avrgcccpp.linker.libraries.Libraries>
|
||||||
|
<ListValues>
|
||||||
|
<Value>libm</Value>
|
||||||
|
</ListValues>
|
||||||
|
</avrgcccpp.linker.libraries.Libraries>
|
||||||
|
<avrgcccpp.assembler.general.IncludePaths>
|
||||||
|
<ListValues>
|
||||||
|
<Value>%24(PackRepoDir)\Atmel\ATmega_DFP\1.4.346\include</Value>
|
||||||
|
</ListValues>
|
||||||
|
</avrgcccpp.assembler.general.IncludePaths>
|
||||||
|
<avrgcc.compiler.symbols.DefSymbols>
|
||||||
|
<ListValues>
|
||||||
|
<Value>DEBUG</Value>
|
||||||
|
</ListValues>
|
||||||
|
</avrgcc.compiler.symbols.DefSymbols>
|
||||||
|
<avrgcc.compiler.optimization.level>Optimize (-O1)</avrgcc.compiler.optimization.level>
|
||||||
|
<avrgcc.compiler.optimization.DebugLevel>Maximum (-g3)</avrgcc.compiler.optimization.DebugLevel>
|
||||||
|
<avrgcccpp.compiler.symbols.DefSymbols>
|
||||||
|
<ListValues>
|
||||||
|
<Value>DEBUG</Value>
|
||||||
|
</ListValues>
|
||||||
|
</avrgcccpp.compiler.symbols.DefSymbols>
|
||||||
|
<avrgcccpp.compiler.optimization.level>Optimize (-O1)</avrgcccpp.compiler.optimization.level>
|
||||||
|
<avrgcccpp.compiler.optimization.DebugLevel>Maximum (-g3)</avrgcccpp.compiler.optimization.DebugLevel>
|
||||||
|
<avrgcccpp.assembler.debugging.DebugLevel>Default (-Wa,-g)</avrgcccpp.assembler.debugging.DebugLevel>
|
||||||
|
</AvrGccCpp>
|
||||||
|
</ToolchainSettings>
|
||||||
|
</PropertyGroup>
|
||||||
|
<ItemGroup>
|
||||||
|
<Compile Include="clock.hpp">
|
||||||
|
<SubType>compile</SubType>
|
||||||
|
</Compile>
|
||||||
|
<Compile Include="i2c\hardware.hpp">
|
||||||
|
<SubType>compile</SubType>
|
||||||
|
</Compile>
|
||||||
|
<Compile Include="i2c\i2c.hpp">
|
||||||
|
<SubType>compile</SubType>
|
||||||
|
</Compile>
|
||||||
|
<Compile Include="main.cpp">
|
||||||
|
<SubType>compile</SubType>
|
||||||
|
</Compile>
|
||||||
|
</ItemGroup>
|
||||||
|
<ItemGroup>
|
||||||
|
<Folder Include="i2c" />
|
||||||
|
</ItemGroup>
|
||||||
|
<Import Project="$(AVRSTUDIO_EXE_PATH)\\Vs\\Compiler.targets" />
|
||||||
|
</Project>
|
||||||
33
i2c/main.cpp
Normal file
33
i2c/main.cpp
Normal file
@ -0,0 +1,33 @@
|
|||||||
|
#include "clock.hpp"
|
||||||
|
|
||||||
|
#include "i2c/i2c.hpp"
|
||||||
|
|
||||||
|
void i2cTest()
|
||||||
|
{
|
||||||
|
using namespace i2c;
|
||||||
|
using config = Hardware<100000>;
|
||||||
|
|
||||||
|
I2c<config> twi;
|
||||||
|
constexpr auto I2CADDRESS = 0x4B;
|
||||||
|
|
||||||
|
twi.init();
|
||||||
|
|
||||||
|
if (!twi.start<I2CADDRESS>(false)) {
|
||||||
|
twi.stop();
|
||||||
|
return;
|
||||||
|
}
|
||||||
|
|
||||||
|
if (!twi.write(0x7F)) {
|
||||||
|
twi.stop();
|
||||||
|
return;
|
||||||
|
}
|
||||||
|
|
||||||
|
twi.stop();
|
||||||
|
}
|
||||||
|
|
||||||
|
int main()
|
||||||
|
{
|
||||||
|
i2cTest();
|
||||||
|
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
Loading…
Reference in New Issue
Block a user