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Add 0x03_button_cbm: bare-metal RP2350 button driver

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- GPIO15 active-low button input with internal pull-up
- 20ms software debounce via busy-wait confirmation
- LED mirrors button state, UART reports edge transitions
- New gpio_config_input_pullup() in GPIO driver
- 1555B FLASH, 13 source files, zero warnings
This commit is contained in:
Kevin Thomas
2026-04-05 16:06:46 -04:00
parent d072ec5946
commit afdc1fa594
33 changed files with 2313 additions and 0 deletions
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drivers/0x03_button_cbm/.vscode/c_cpp_properties.json
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{
"configurations": [
{
"name": "ARM GCC",
"includePath": [
"${workspaceFolder}/Inc/**"
],
"defines": [
"__GNUC__",
"__ARM_ARCH_8M_MAIN__",
"__ARMCC_VERSION"
],
"compilerPath": "${userHome}/.pico-sdk/toolchain/14_2_Rel1/bin/arm-none-eabi-gcc",
"compileCommands": "${workspaceFolder}/compile_commands.json",
"cStandard": "c11",
"cppStandard": "c++17",
"intelliSenseMode": "gcc-arm",
"compilerArgs": [
"-mcpu=cortex-m33",
"-mthumb"
]
},
{
"name": "ARM GCC (Windows)",
"includePath": [
"${workspaceFolder}/Inc/**"
],
"defines": [
"__GNUC__",
"__ARM_ARCH_8M_MAIN__",
"__ARMCC_VERSION"
],
"compilerPath": "${env:USERPROFILE}/.pico-sdk/toolchain/14_2_Rel1/bin/arm-none-eabi-gcc.exe",
"compileCommands": "${workspaceFolder}/compile_commands.json",
"cStandard": "c11",
"cppStandard": "c++17",
"intelliSenseMode": "gcc-arm",
"compilerArgs": [
"-mcpu=cortex-m33",
"-mthumb"
]
}
],
"version": 4
}
drivers/0x03_button_cbm/.vscode/extensions.json
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{
"recommendations": [
"marus25.cortex-debug",
"ms-vscode.cpptools",
"ms-vscode.cpptools-extension-pack",
"ms-vscode.vscode-serial-monitor",
"raspberry-pi.raspberry-pi-pico"
]
}
drivers/0x03_button_cbm/.vscode/launch.json
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{
"version": "0.2.0",
"configurations": [
{
"name": "Debug RP2350 (OpenOCD)",
"cwd": "${workspaceFolder}",
"executable": "${workspaceFolder}/build/button.elf",
"request": "launch",
"type": "cortex-debug",
"servertype": "openocd",
"serverpath": "${userHome}/.pico-sdk/openocd/0.12.0+dev/openocd",
"searchDir": [
"${userHome}/.pico-sdk/openocd/0.12.0+dev/scripts"
],
"gdbPath": "${userHome}/.pico-sdk/toolchain/14_2_Rel1/bin/arm-none-eabi-gdb",
"device": "RP2350",
"configFiles": [
"interface/cmsis-dap.cfg",
"target/rp2350.cfg"
],
"svdFile": "${userHome}/.pico-sdk/sdk/2.2.0/src/rp2350/hardware_regs/RP2350.svd",
"overrideLaunchCommands": [
"set arch armv8-m.main",
"set output-radix 16",
"monitor reset init",
"load",
"monitor reset halt"
],
"openOCDPreConfigLaunchCommands": [
"set USE_CORE { cm0 cm1 }"
],
"openOCDLaunchCommands": [
"adapter speed 5000"
],
"preLaunchTask": "Compile Project",
"showDevDebugOutput": "raw",
"windows": {
"serverpath": "${env:USERPROFILE}/.pico-sdk/openocd/0.12.0+dev/openocd.exe",
"searchDir": [
"${env:USERPROFILE}/.pico-sdk/openocd/0.12.0+dev/scripts"
],
"gdbPath": "${env:USERPROFILE}/.pico-sdk/toolchain/14_2_Rel1/bin/arm-none-eabi-gdb.exe",
"svdFile": "${env:USERPROFILE}/.pico-sdk/sdk/2.2.0/src/rp2350/hardware_regs/RP2350.svd"
}
}
]
}
drivers/0x03_button_cbm/.vscode/settings.json
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{
"cmake.showSystemKits": false,
"cmake.options.statusBarVisibility": "hidden",
"cmake.options.advanced": {
"build": {
"statusBarVisibility": "hidden"
},
"launch": {
"statusBarVisibility": "hidden"
},
"debug": {
"statusBarVisibility": "hidden"
}
},
"cmake.configureOnEdit": false,
"cmake.automaticReconfigure": false,
"cmake.configureOnOpen": false,
"cmake.generator": "Ninja",
"cmake.cmakePath": "${userHome}/.pico-sdk/cmake/v3.31.5/bin/cmake",
"C_Cpp.debugShortcut": false,
"terminal.integrated.env.windows": {
"PICO_SDK_PATH": "${env:USERPROFILE}/.pico-sdk/sdk/2.2.0",
"PICO_TOOLCHAIN_PATH": "${env:USERPROFILE}/.pico-sdk/toolchain/14_2_Rel1",
"Path": "${env:USERPROFILE}/.pico-sdk/toolchain/14_2_Rel1/bin;${env:USERPROFILE}/.pico-sdk/picotool/2.2.0-a4/picotool;${env:USERPROFILE}/.pico-sdk/cmake/v3.31.5/bin;${env:USERPROFILE}/.pico-sdk/ninja/v1.12.1;${env:PATH}"
},
"terminal.integrated.env.osx": {
"PICO_SDK_PATH": "${env:HOME}/.pico-sdk/sdk/2.2.0",
"PICO_TOOLCHAIN_PATH": "${env:HOME}/.pico-sdk/toolchain/14_2_Rel1",
"PATH": "${env:HOME}/.pico-sdk/toolchain/14_2_Rel1/bin:${env:HOME}/.pico-sdk/picotool/2.2.0-a4/picotool:${env:HOME}/.pico-sdk/cmake/v3.31.5/bin:${env:HOME}/.pico-sdk/ninja/v1.12.1:${env:PATH}"
},
"terminal.integrated.env.linux": {
"PICO_SDK_PATH": "${env:HOME}/.pico-sdk/sdk/2.2.0",
"PICO_TOOLCHAIN_PATH": "${env:HOME}/.pico-sdk/toolchain/14_2_Rel1",
"PATH": "${env:HOME}/.pico-sdk/toolchain/14_2_Rel1/bin:${env:HOME}/.pico-sdk/picotool/2.2.0-a4/picotool:${env:HOME}/.pico-sdk/cmake/v3.31.5/bin:${env:HOME}/.pico-sdk/ninja/v1.12.1:${env:PATH}"
},
"raspberry-pi-pico.cmakeAutoConfigure": true,
"raspberry-pi-pico.useCmakeTools": false,
"raspberry-pi-pico.cmakePath": "${HOME}/.pico-sdk/cmake/v3.31.5/bin/cmake",
"raspberry-pi-pico.ninjaPath": "${HOME}/.pico-sdk/ninja/v1.12.1/ninja"
}
drivers/0x03_button_cbm/.vscode/tasks.json
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{
"version": "2.0.0",
"tasks": [
{
"label": "Compile Project",
"type": "shell",
"command": "make",
"group": {
"kind": "build",
"isDefault": true
},
"presentation": {
"reveal": "always",
"panel": "dedicated"
},
"problemMatcher": "$gcc",
"windows": {
"command": ".\\build.bat"
}
},
{
"label": "Clean Project",
"type": "shell",
"command": "make clean",
"group": "build",
"presentation": {
"reveal": "always",
"panel": "dedicated"
},
"problemMatcher": [],
"windows": {
"command": ".\\clean.bat"
}
},
{
"label": "Run Project",
"type": "shell",
"command": "${userHome}/.pico-sdk/picotool/2.2.0-a4/picotool/picotool",
"args": [
"load",
"build/button.uf2",
"-fx"
],
"presentation": {
"reveal": "always",
"panel": "dedicated"
},
"problemMatcher": [],
"dependsOn": [
"Compile Project"
],
"windows": {
"command": "${env:USERPROFILE}/.pico-sdk/picotool/2.2.0-a4/picotool/picotool.exe"
}
},
{
"label": "Flash",
"type": "shell",
"command": "${userHome}/.pico-sdk/openocd/0.12.0+dev/openocd",
"args": [
"-s",
"${userHome}/.pico-sdk/openocd/0.12.0+dev/scripts",
"-f",
"interface/cmsis-dap.cfg",
"-f",
"target/rp2350.cfg",
"-c",
"adapter speed 5000; program build/button.elf verify reset exit"
],
"problemMatcher": [],
"dependsOn": [
"Compile Project"
],
"windows": {
"command": "${env:USERPROFILE}/.pico-sdk/openocd/0.12.0+dev/openocd.exe"
}
},
{
"label": "Rescue Reset",
"type": "process",
"command": "${userHome}/.pico-sdk/openocd/0.12.0+dev/openocd",
"args": [
"-s",
"${userHome}/.pico-sdk/openocd/0.12.0+dev/scripts",
"-f",
"interface/cmsis-dap.cfg",
"-f",
"target/${command:raspberry-pi-pico.getChip}-rescue.cfg",
"-c",
"adapter speed 5000; reset halt; exit"
],
"problemMatcher": [],
"windows": {
"command": "${env:USERPROFILE}/.pico-sdk/openocd/0.12.0+dev/openocd.exe"
}
},
{
"label": "RISC-V Reset (RP2350)",
"type": "process",
"command": "${userHome}/.pico-sdk/openocd/0.12.0+dev/openocd",
"args": [
"-s",
"${userHome}/.pico-sdk/openocd/0.12.0+dev/scripts",
"-c",
"set USE_CORE { rv0 rv1 cm0 cm1 }",
"-f",
"interface/cmsis-dap.cfg",
"-f",
"target/rp2350.cfg",
"-c",
"adapter speed 5000; init;",
"-c",
"write_memory 0x40120158 8 { 0x3 }; echo [format \"Info : ARCHSEL 0x%02x\" [read_memory 0x40120158 8 1]];",
"-c",
"reset halt; targets rp2350.rv0; echo [format \"Info : ARCHSEL_STATUS 0x%02x\" [read_memory 0x4012015C 8 1]]; exit"
],
"problemMatcher": [],
"windows": {
"command": "${env:USERPROFILE}/.pico-sdk/openocd/0.12.0+dev/openocd.exe"
}
}
]
}
],
"problemMatcher": []
}
]
}