Add PWM demo code
Add PWM demo code. We use libsoc for handling PWM.
This commit is contained in:
parent
8ddd35a86c
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5b6fdce273
5 changed files with 167 additions and 0 deletions
65
pwm/.cproject
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65
pwm/.cproject
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<?xml version="1.0" encoding="UTF-8" standalone="no"?>
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<?fileVersion 4.0.0?><cproject storage_type_id="org.eclipse.cdt.core.XmlProjectDescriptionStorage">
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<storageModule moduleId="org.eclipse.cdt.core.settings">
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<cconfiguration id="cdt.managedbuild.config.gnu.cross.exe.debug.2021969369">
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<storageModule buildSystemId="org.eclipse.cdt.managedbuilder.core.configurationDataProvider" id="cdt.managedbuild.config.gnu.cross.exe.debug.2021969369" moduleId="org.eclipse.cdt.core.settings" name="Debug">
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<externalSettings/>
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<extensions>
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<extension id="org.eclipse.cdt.core.ELF" point="org.eclipse.cdt.core.BinaryParser"/>
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<extension id="org.eclipse.cdt.core.GASErrorParser" point="org.eclipse.cdt.core.ErrorParser"/>
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<extension id="org.eclipse.cdt.core.GmakeErrorParser" point="org.eclipse.cdt.core.ErrorParser"/>
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<extension id="org.eclipse.cdt.core.GLDErrorParser" point="org.eclipse.cdt.core.ErrorParser"/>
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<extension id="org.eclipse.cdt.core.CWDLocator" point="org.eclipse.cdt.core.ErrorParser"/>
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<extension id="org.eclipse.cdt.core.GCCErrorParser" point="org.eclipse.cdt.core.ErrorParser"/>
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</extensions>
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</storageModule>
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<storageModule moduleId="cdtBuildSystem" version="4.0.0">
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<configuration artifactName="${ProjName}" buildArtefactType="org.eclipse.cdt.build.core.buildArtefactType.exe" buildProperties="org.eclipse.cdt.build.core.buildArtefactType=org.eclipse.cdt.build.core.buildArtefactType.exe,org.eclipse.cdt.build.core.buildType=org.eclipse.cdt.build.core.buildType.debug" cleanCommand="rm -rf" description="" id="cdt.managedbuild.config.gnu.cross.exe.debug.2021969369" name="Debug" parent="cdt.managedbuild.config.gnu.cross.exe.debug">
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<folderInfo id="cdt.managedbuild.config.gnu.cross.exe.debug.2021969369." name="/" resourcePath="">
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<toolChain id="cdt.managedbuild.toolchain.gnu.cross.exe.debug.820647595" name="Cross GCC" superClass="cdt.managedbuild.toolchain.gnu.cross.exe.debug">
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<targetPlatform archList="all" binaryParser="org.eclipse.cdt.core.ELF" id="cdt.managedbuild.targetPlatform.gnu.cross.548900668" isAbstract="false" osList="all" superClass="cdt.managedbuild.targetPlatform.gnu.cross"/>
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<builder buildPath="${workspace_loc:/pwm}/Debug" id="cdt.managedbuild.builder.gnu.cross.1375415820" keepEnvironmentInBuildfile="false" managedBuildOn="true" name="Gnu Make Builder" superClass="cdt.managedbuild.builder.gnu.cross"/>
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<tool command="${CC}" id="cdt.managedbuild.tool.gnu.cross.c.compiler.1368914442" name="Cross GCC Compiler" superClass="cdt.managedbuild.tool.gnu.cross.c.compiler">
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<option defaultValue="gnu.c.optimization.level.none" id="gnu.c.compiler.option.optimization.level.698258441" name="Optimization Level" superClass="gnu.c.compiler.option.optimization.level" useByScannerDiscovery="false" valueType="enumerated"/>
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<option id="gnu.c.compiler.option.debugging.level.1327264068" name="Debug Level" superClass="gnu.c.compiler.option.debugging.level" useByScannerDiscovery="false" value="gnu.c.debugging.level.max" valueType="enumerated"/>
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<option id="gnu.c.compiler.option.misc.other.1221019590" name="Other flags" superClass="gnu.c.compiler.option.misc.other" useByScannerDiscovery="false" value="${CFLAGS} -c --sysroot=/usr/local/oecore-x86_64/sysroots/armv7at2hf-neon-angstrom-linux-gnueabi/" valueType="string"/>
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<inputType id="cdt.managedbuild.tool.gnu.c.compiler.input.1557145701" superClass="cdt.managedbuild.tool.gnu.c.compiler.input"/>
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</tool>
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<tool id="cdt.managedbuild.tool.gnu.cross.cpp.compiler.1069541434" name="Cross G++ Compiler" superClass="cdt.managedbuild.tool.gnu.cross.cpp.compiler">
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<option id="gnu.cpp.compiler.option.optimization.level.1671402547" name="Optimization Level" superClass="gnu.cpp.compiler.option.optimization.level" useByScannerDiscovery="false" value="gnu.cpp.compiler.optimization.level.none" valueType="enumerated"/>
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<option id="gnu.cpp.compiler.option.debugging.level.1127804250" name="Debug Level" superClass="gnu.cpp.compiler.option.debugging.level" useByScannerDiscovery="false" value="gnu.cpp.compiler.debugging.level.max" valueType="enumerated"/>
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</tool>
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<tool command="${CC}" id="cdt.managedbuild.tool.gnu.cross.c.linker.760587897" name="Cross GCC Linker" superClass="cdt.managedbuild.tool.gnu.cross.c.linker">
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<option id="gnu.c.link.option.libs.866397045" superClass="gnu.c.link.option.libs" useByScannerDiscovery="false" valueType="libs">
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<listOptionValue builtIn="false" value="soc"/>
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</option>
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<inputType id="cdt.managedbuild.tool.gnu.c.linker.input.706772069" superClass="cdt.managedbuild.tool.gnu.c.linker.input">
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<additionalInput kind="additionalinputdependency" paths="$(USER_OBJS)"/>
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<additionalInput kind="additionalinput" paths="$(LIBS)"/>
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</inputType>
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</tool>
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<tool id="cdt.managedbuild.tool.gnu.cross.cpp.linker.1290357125" name="Cross G++ Linker" superClass="cdt.managedbuild.tool.gnu.cross.cpp.linker"/>
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<tool id="cdt.managedbuild.tool.gnu.cross.archiver.219000133" name="Cross GCC Archiver" superClass="cdt.managedbuild.tool.gnu.cross.archiver"/>
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<tool command="${AS}" id="cdt.managedbuild.tool.gnu.cross.assembler.755294849" name="Cross GCC Assembler" superClass="cdt.managedbuild.tool.gnu.cross.assembler">
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<inputType id="cdt.managedbuild.tool.gnu.assembler.input.19622702" superClass="cdt.managedbuild.tool.gnu.assembler.input"/>
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</tool>
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</toolChain>
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</folderInfo>
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</configuration>
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</storageModule>
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<storageModule moduleId="org.eclipse.cdt.core.externalSettings"/>
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</cconfiguration>
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</storageModule>
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<storageModule moduleId="cdtBuildSystem" version="4.0.0">
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<project id="pwm.cdt.managedbuild.target.gnu.cross.exe.1936458768" name="Executable" projectType="cdt.managedbuild.target.gnu.cross.exe"/>
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</storageModule>
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<storageModule moduleId="scannerConfiguration">
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<autodiscovery enabled="true" problemReportingEnabled="true" selectedProfileId=""/>
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<scannerConfigBuildInfo instanceId="cdt.managedbuild.config.gnu.cross.exe.debug.2021969369;cdt.managedbuild.config.gnu.cross.exe.debug.2021969369.;cdt.managedbuild.tool.gnu.cross.c.compiler.1368914442;cdt.managedbuild.tool.gnu.c.compiler.input.1557145701">
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<autodiscovery enabled="true" problemReportingEnabled="true" selectedProfileId=""/>
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</scannerConfigBuildInfo>
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</storageModule>
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<storageModule moduleId="org.eclipse.cdt.core.LanguageSettingsProviders"/>
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<storageModule moduleId="org.eclipse.cdt.make.core.buildtargets"/>
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<storageModule moduleId="refreshScope"/>
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</cproject>
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1
pwm/.gitignore
vendored
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1
pwm/.gitignore
vendored
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/Debug/
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26
pwm/.project
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26
pwm/.project
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@ -0,0 +1,26 @@
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<?xml version="1.0" encoding="UTF-8"?>
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<projectDescription>
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<name>pwm</name>
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<comment></comment>
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<projects>
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</projects>
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<buildSpec>
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<buildCommand>
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<name>org.eclipse.cdt.managedbuilder.core.genmakebuilder</name>
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<triggers>clean,full,incremental,</triggers>
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<arguments>
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</arguments>
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</buildCommand>
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<buildCommand>
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<name>org.eclipse.cdt.managedbuilder.core.ScannerConfigBuilder</name>
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<triggers>full,incremental,</triggers>
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<arguments>
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</arguments>
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</buildCommand>
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</buildSpec>
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<natures>
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<nature>org.eclipse.cdt.core.cnature</nature>
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<nature>org.eclipse.cdt.managedbuilder.core.managedBuildNature</nature>
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<nature>org.eclipse.cdt.managedbuilder.core.ScannerConfigNature</nature>
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</natures>
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</projectDescription>
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14
pwm/.settings/language.settings.xml
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14
pwm/.settings/language.settings.xml
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@ -0,0 +1,14 @@
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<?xml version="1.0" encoding="UTF-8" standalone="no"?>
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<project>
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<configuration id="cdt.managedbuild.config.gnu.cross.exe.debug.2021969369" name="Debug">
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<extension point="org.eclipse.cdt.core.LanguageSettingsProvider">
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<provider copy-of="extension" id="org.eclipse.cdt.ui.UserLanguageSettingsProvider"/>
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<provider-reference id="org.eclipse.cdt.core.ReferencedProjectsLanguageSettingsProvider" ref="shared-provider"/>
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<provider-reference id="org.eclipse.cdt.managedbuilder.core.MBSLanguageSettingsProvider" ref="shared-provider"/>
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<provider class="org.eclipse.cdt.internal.build.crossgcc.CrossGCCBuiltinSpecsDetector" console="false" env-hash="666590290315624892" id="org.eclipse.cdt.build.crossgcc.CrossGCCBuiltinSpecsDetector" keep-relative-paths="false" name="CDT Cross GCC Built-in Compiler Settings" parameter="${COMMAND} ${FLAGS} -E -P -v -dD "${INPUTS}"" prefer-non-shared="true">
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<language-scope id="org.eclipse.cdt.core.gcc"/>
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<language-scope id="org.eclipse.cdt.core.g++"/>
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</provider>
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</extension>
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</configuration>
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</project>
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61
pwm/pwm.c
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61
pwm/pwm.c
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h>
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#include <unistd.h>
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#include <stdint.h>
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#include <stdbool.h>
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#include <libsoc_pwm.h>
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/*
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* libsoc PWM API Documentation: https://jackmitch.github.io/libsoc/c/pwm/
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*/
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int main(void)
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{
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pwm* vf_pwm = NULL;
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uint32_t ret = EXIT_SUCCESS;
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uint32_t pwm_period = 0;
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uint32_t pwm_duty_cycle = 0;
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vf_pwm = libsoc_pwm_request(0, 0, LS_WEAK);
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if (vf_pwm == NULL) {
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perror("PWM request failed");
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return EXIT_FAILURE;
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}
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printf("Enter PWM Period:\t");
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scanf("%d", &pwm_period);
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ret = libsoc_pwm_set_period(vf_pwm, pwm_period);
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if (ret == EXIT_FAILURE) {
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perror("PWM set period failed");
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goto exit_failure;
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}
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printf("Enter PWM Duty Cycle:\t");
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scanf("%d", &pwm_duty_cycle);
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ret = libsoc_pwm_set_duty_cycle(vf_pwm, pwm_duty_cycle);
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if (ret == EXIT_FAILURE) {
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perror("PWM set duty cycle failed");
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goto exit_failure;
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}
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ret = libsoc_pwm_set_enabled(vf_pwm, ENABLED);
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if (ret == EXIT_FAILURE) {
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perror("PWM enable failed");
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goto exit_failure;
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}
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printf("PWM will be running for 10 seconds\n");
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sleep(10);
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printf("Disabling PWM\n");
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ret = libsoc_pwm_set_enabled(vf_pwm, DISABLED);
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if (ret == EXIT_FAILURE)
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perror("PWM disable failed");
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exit_failure:
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libsoc_pwm_free(vf_pwm);
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return ret;
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}
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