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Added constants

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This commit is contained in:
Kevin Thomas
2025-10-24 17:34:51 -04:00
parent f7c5f1b431
commit 41191e7c6f
17 changed files with 558 additions and 172 deletions
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5
0x0017_constants/.gitignore vendored
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@@ -1,5 +1,2 @@
.idea
_deps
cmake-*
build
.DS_Store
!.vscode/*

1
0x0017_constants/.vscode/.cortex-debug.peripherals.state.json vendored
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[]

1
0x0017_constants/.vscode/.cortex-debug.registers.state.json vendored
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[]

36
0x0017_constants/.vscode/c_cpp_properties.json vendored
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@@ -1,18 +1,22 @@
{
"configurations": [
{
"name": "Pico",
"includePath": [
"${workspaceFolder}/**",
"${env:PICO_SDK_PATH}/**"
],
"defines": [],
"compilerPath": "${env:PICO_INSTALL_PATH}/gcc-arm-none-eabi/bin/arm-none-eabi-gcc.exe",
"cStandard": "c11",
"cppStandard": "c++11",
"intelliSenseMode": "linux-gcc-arm",
"configurationProvider": "ms-vscode.cmake-tools"
}
],
"version": 4
"configurations": [
{
"name": "Pico",
"includePath": [
"${workspaceFolder}/**",
"${userHome}/.pico-sdk/sdk/2.2.0/**"
],
"forcedInclude": [
"${workspaceFolder}/build/generated/pico_base/pico/config_autogen.h",
"${userHome}/.pico-sdk/sdk/2.2.0/src/common/pico_base_headers/include/pico.h"
],
"defines": [],
"compilerPath": "${userHome}/.pico-sdk/toolchain/14_2_Rel1/bin/arm-none-eabi-gcc.exe",
"compileCommands": "${workspaceFolder}/build/compile_commands.json",
"cStandard": "c17",
"cppStandard": "c++14",
"intelliSenseMode": "linux-gcc-arm"
}
],
"version": 4
}

15
0x0017_constants/.vscode/cmake-kits.json vendored Normal file
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@@ -0,0 +1,15 @@
[
{
"name": "Pico",
"compilers": {
"C": "${command:raspberry-pi-pico.getCompilerPath}",
"CXX": "${command:raspberry-pi-pico.getCxxCompilerPath}"
},
"environmentVariables": {
"PATH": "${command:raspberry-pi-pico.getEnvPath};${env:PATH}"
},
"cmakeSettings": {
"Python3_EXECUTABLE": "${command:raspberry-pi-pico.getPythonPath}"
}
}
]

16
0x0017_constants/.vscode/extensions.json vendored
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@@ -1,9 +1,9 @@
{
"recommendations": [
"marus25.cortex-debug",
"ms-vscode.cmake-tools",
"ms-vscode.cpptools",
"ms-vscode.cpptools-extension-pack",
"ms-vscode.vscode-serial-monitor"
]
}
"recommendations": [
"marus25.cortex-debug",
"ms-vscode.cpptools",
"ms-vscode.cpptools-extension-pack",
"ms-vscode.vscode-serial-monitor",
"raspberry-pi.raspberry-pi-pico"
]
}

104
0x0017_constants/.vscode/launch.json vendored
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@@ -1,58 +1,50 @@
{
"version": "0.2.0",
"configurations": [
{
"name": "Pico Debug (Cortex-Debug)",
"cwd": "${workspaceFolder}",
"executable": "${command:cmake.launchTargetPath}",
"request": "launch",
"type": "cortex-debug",
"servertype": "openocd",
"gdbPath": "arm-none-eabi-gdb",
"device": "RP2040",
"configFiles": [
"interface/cmsis-dap.cfg",
"target/rp2040.cfg"
],
"svdFile": "${env:PICO_SDK_PATH}/src/rp2040/hardware_regs/rp2040.svd",
"runToEntryPoint": "main",
"openOCDLaunchCommands": [
"adapter speed 1000"
]
},
{
"name": "Pico Debug (Cortex-Debug with external OpenOCD)",
"cwd": "${workspaceFolder}",
"executable": "${command:cmake.launchTargetPath}",
"request": "launch",
"type": "cortex-debug",
"servertype": "external",
"gdbTarget": "localhost:3333",
"gdbPath": "arm-none-eabi-gdb",
"device": "RP2040",
"svdFile": "${env:PICO_SDK_PATH}/src/rp2040/hardware_regs/rp2040.svd",
"runToEntryPoint": "main"
},
{
"name": "Pico Debug (C++ Debugger)",
"type": "cppdbg",
"request": "launch",
"cwd": "${workspaceFolder}",
"program": "${command:cmake.launchTargetPath}",
"MIMode": "gdb",
"miDebuggerPath": "arm-none-eabi-gdb",
"miDebuggerServerAddress": "localhost:3333",
"debugServerPath": "openocd",
"debugServerArgs": "-f interface/cmsis-dap.cfg -f target/rp2040.cfg -c \"adapter speed 1000\"",
"serverStarted": "Listening on port .* for gdb connections",
"filterStderr": true,
"stopAtEntry": true,
"hardwareBreakpoints": {
"require": true,
"limit": 4
},
"preLaunchTask": "Flash",
"svdPath": "${env:PICO_SDK_PATH}/src/rp2040/hardware_regs/rp2040.svd"
}
]
"version": "0.2.0",
"configurations": [
{
"name": "Pico Debug (Cortex-Debug)",
"cwd": "${userHome}/.pico-sdk/openocd/0.12.0+dev/scripts",
"executable": "${command:raspberry-pi-pico.launchTargetPath}",
"request": "launch",
"type": "cortex-debug",
"servertype": "openocd",
"serverpath": "${userHome}/.pico-sdk/openocd/0.12.0+dev/openocd.exe",
"gdbPath": "${command:raspberry-pi-pico.getGDBPath}",
"device": "${command:raspberry-pi-pico.getChipUppercase}",
"configFiles": [
"interface/cmsis-dap.cfg",
"target/${command:raspberry-pi-pico.getTarget}.cfg"
],
"svdFile": "${userHome}/.pico-sdk/sdk/2.2.0/src/${command:raspberry-pi-pico.getChip}/hardware_regs/${command:raspberry-pi-pico.getChipUppercase}.svd",
"runToEntryPoint": "main",
// Fix for no_flash binaries, where monitor reset halt doesn't do what is expected
// Also works fine for flash binaries
"overrideLaunchCommands": [
"monitor reset init",
"load \"${command:raspberry-pi-pico.launchTargetPath}\""
],
"openOCDLaunchCommands": [
"adapter speed 5000"
]
},
{
"name": "Pico Debug (Cortex-Debug with external OpenOCD)",
"cwd": "${workspaceRoot}",
"executable": "${command:raspberry-pi-pico.launchTargetPath}",
"request": "launch",
"type": "cortex-debug",
"servertype": "external",
"gdbTarget": "localhost:3333",
"gdbPath": "${command:raspberry-pi-pico.getGDBPath}",
"device": "${command:raspberry-pi-pico.getChipUppercase}",
"svdFile": "${userHome}/.pico-sdk/sdk/2.2.0/src/${command:raspberry-pi-pico.getChip}/hardware_regs/${command:raspberry-pi-pico.getChipUppercase}.svd",
"runToEntryPoint": "main",
// Fix for no_flash binaries, where monitor reset halt doesn't do what is expected
// Also works fine for flash binaries
"overrideLaunchCommands": [
"monitor reset init",
"load \"${command:raspberry-pi-pico.launchTargetPath}\""
]
},
]
}

51
0x0017_constants/.vscode/settings.json vendored
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@@ -1,29 +1,42 @@
{
// These settings tweaks to the cmake plugin will ensure
// that you debug using cortex-debug instead of trying to launch
// a Pico binary on the host
"cmake.statusbar.advanced": {
"debug": {
"visibility": "hidden"
"cmake.showSystemKits": false,
"cmake.options.statusBarVisibility": "hidden",
"cmake.options.advanced": {
"build": {
"statusBarVisibility": "hidden"
},
"launch": {
"visibility": "hidden"
"statusBarVisibility": "hidden"
},
"build": {
"visibility": "hidden"
},
"buildTarget": {
"visibility": "hidden"
"debug": {
"statusBarVisibility": "hidden"
}
},
"cmake.buildBeforeRun": true,
"cmake.configureOnOpen": true,
"cmake.configureSettings": {
"CMAKE_MODULE_PATH": "${env:PICO_INSTALL_PATH}/pico-sdk-tools"
},
"cmake.configureOnEdit": false,
"cmake.automaticReconfigure": false,
"cmake.configureOnOpen": false,
"cmake.generator": "Ninja",
"C_Cpp.default.configurationProvider": "ms-vscode.cmake-tools",
"C_Cpp.errorSquiggles": "enabled",
"cmake.cmakePath": "${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",
"files.associations": {
"stdlib.h": "c"
}

127
0x0017_constants/.vscode/tasks.json vendored
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@@ -1,29 +1,102 @@
{
"version": "2.0.0",
"tasks": [
{
"label": "Flash",
"type": "shell",
"command": "openocd",
"args": [
"-f",
"interface/cmsis-dap.cfg",
"-f",
"target/rp2040.cfg",
"-c",
"adapter speed 1000; program {${command:cmake.launchTargetPath}} verify reset exit"
],
"problemMatcher": []
},
{
"label": "Build",
"type": "cmake",
"command": "build",
"problemMatcher": "$gcc",
"group": {
"kind": "build",
"isDefault": true
}
}
]
"version": "2.0.0",
"tasks": [
{
"label": "Compile Project",
"type": "process",
"isBuildCommand": true,
"command": "${userHome}/.pico-sdk/ninja/v1.12.1/ninja",
"args": ["-C", "${workspaceFolder}/build"],
"group": "build",
"presentation": {
"reveal": "always",
"panel": "dedicated"
},
"problemMatcher": "$gcc",
"windows": {
"command": "${env:USERPROFILE}/.pico-sdk/ninja/v1.12.1/ninja.exe"
}
},
{
"label": "Run Project",
"type": "process",
"command": "${env:HOME}/.pico-sdk/picotool/2.2.0-a4/picotool/picotool",
"args": [
"load",
"${command:raspberry-pi-pico.launchTargetPath}",
"-fx"
],
"presentation": {
"reveal": "always",
"panel": "dedicated"
},
"problemMatcher": [],
"windows": {
"command": "${env:USERPROFILE}/.pico-sdk/picotool/2.2.0-a4/picotool/picotool.exe"
}
},
{
"label": "Flash",
"type": "process",
"command": "${userHome}/.pico-sdk/openocd/0.12.0+dev/openocd.exe",
"args": [
"-s",
"${userHome}/.pico-sdk/openocd/0.12.0+dev/scripts",
"-f",
"interface/cmsis-dap.cfg",
"-f",
"target/${command:raspberry-pi-pico.getTarget}.cfg",
"-c",
"adapter speed 5000; program \"${command:raspberry-pi-pico.launchTargetPath}\" verify reset exit"
],
"problemMatcher": [],
"windows": {
"command": "${env:USERPROFILE}/.pico-sdk/openocd/0.12.0+dev/openocd.exe",
}
},
{
"label": "Rescue Reset",
"type": "process",
"command": "${userHome}/.pico-sdk/openocd/0.12.0+dev/openocd.exe",
"args": [
"-s",
"${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": "${userHome}/.pico-sdk/openocd/0.12.0+dev/openocd.exe",
"args": [
"-s",
"${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",
}
}
]
}

35
0x0017_constants/0x0017_constants.c Normal file
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#include <stdio.h>
#include <string.h>
#include "pico/stdlib.h"
#include "hardware/i2c.h"
#include "lcd_1602.h"
#define FAV_NUM 42
#define I2C_PORT i2c1
#define I2C_SDA_PIN 2
#define I2C_SCL_PIN 3
const int OTHER_FAV_NUM = 1337;
int main(void) {
stdio_init_all();
i2c_init(I2C_PORT, 100000);
gpio_set_function(I2C_SDA_PIN, GPIO_FUNC_I2C);
gpio_set_function(I2C_SCL_PIN, GPIO_FUNC_I2C);
gpio_pull_up(I2C_SDA_PIN);
gpio_pull_up(I2C_SCL_PIN);
lcd_i2c_init(I2C_PORT, 0x27, 4, 0x08);
lcd_set_cursor(0, 0);
lcd_puts("Reverse");
lcd_set_cursor(1, 0);
lcd_puts("Engineering");
while (true) {
printf("FAV_NUM: %d\r\n", FAV_NUM);
printf("OTHER_FAV_NUM: %d\r\n", OTHER_FAV_NUM);
}
}

56
0x0017_constants/CMakeLists.txt
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@@ -1,21 +1,59 @@
# Generated Cmake Pico project file
cmake_minimum_required(VERSION 3.13)
include(pico_sdk_import.cmake)
project(0x0017_constant C CXX ASM)
set(CMAKE_C_STANDARD 11)
set(CMAKE_CXX_STANDARD 17)
set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
# Initialise pico_sdk from installed location
# (note this can come from environment, CMake cache etc)
# == DO NOT EDIT THE FOLLOWING LINES for the Raspberry Pi Pico VS Code Extension to work ==
if(WIN32)
set(USERHOME $ENV{USERPROFILE})
else()
set(USERHOME $ENV{HOME})
endif()
set(sdkVersion 2.2.0)
set(toolchainVersion 14_2_Rel1)
set(picotoolVersion 2.2.0-a4)
set(picoVscode ${USERHOME}/.pico-sdk/cmake/pico-vscode.cmake)
if (EXISTS ${picoVscode})
include(${picoVscode})
endif()
# ====================================================================================
set(PICO_BOARD pico2 CACHE STRING "Board type")
# Pull in Raspberry Pi Pico SDK (must be before project)
include(pico_sdk_import.cmake)
project(0x0017_constants C CXX ASM)
# Initialise the Raspberry Pi Pico SDK
pico_sdk_init()
add_executable(0x0017_constant
main.c
)
# Add executable. Default name is the project name, version 0.1
pico_enable_stdio_usb(0x0017_constant 1)
pico_enable_stdio_uart(0x0017_constant 1)
add_executable(0x0017_constants 0x0017_constants.c lcd_1602.c)
pico_add_extra_outputs(0x0017_constant)
pico_set_program_name(0x0017_constants "0x0017_constants")
pico_set_program_version(0x0017_constants "0.1")
target_link_libraries(0x0017_constant
# Modify the below lines to enable/disable output over UART/USB
pico_enable_stdio_uart(0x0017_constants 1)
pico_enable_stdio_usb(0x0017_constants 0)
# Add the standard library to the build
target_link_libraries(0x0017_constants
pico_stdlib
hardware_i2c
hardware_gpio)
# Add the standard include files to the build
target_include_directories(0x0017_constants PRIVATE
${CMAKE_CURRENT_LIST_DIR}
)
pico_add_extra_outputs(0x0017_constants)

114
0x0017_constants/lcd_1602.c Normal file
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/**
* @file lcd_1602.c
* @brief Implementation of PCF8574-backed HD44780 (16x2) LCD driver
* @author Kevin Thomas
* @date 2025
*
* MIT License
*
* Copyright (c) 2025 Kevin Thomas
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include "lcd_1602.h"
#include <string.h>
#include <stdint.h>
static i2c_inst_t *lcd_i2c = NULL;
static uint8_t lcd_addr = 0x27;
static int lcd_nibble_shift = 4;
static uint8_t lcd_backlight_mask = 0x08;
/* PCF8574 -> LCD control pins */
#define PIN_RS 0x01
#define PIN_RW 0x02
#define PIN_EN 0x04
static void pcf_write_byte(uint8_t data) {
if (!lcd_i2c) return;
i2c_write_blocking(lcd_i2c, lcd_addr, &data, 1, false);
}
static void pcf_pulse_enable(uint8_t data) {
pcf_write_byte(data | PIN_EN);
sleep_us(1);
pcf_write_byte(data & ~PIN_EN);
sleep_us(50);
}
static void lcd_write4(uint8_t nibble, uint8_t mode) {
uint8_t data = (nibble & 0x0F) << lcd_nibble_shift;
data |= mode ? PIN_RS : 0;
data |= lcd_backlight_mask;
pcf_pulse_enable(data);
}
static void lcd_send(uint8_t value, uint8_t mode) {
lcd_write4((value >> 4) & 0x0F, mode);
lcd_write4(value & 0x0F, mode);
}
void lcd_i2c_init(i2c_inst_t *i2c, uint8_t pcf_addr, int nibble_shift, uint8_t backlight_mask) {
lcd_i2c = i2c;
lcd_addr = pcf_addr;
lcd_nibble_shift = nibble_shift;
lcd_backlight_mask = backlight_mask;
// Follow init sequence for HD44780 in 4-bit mode
lcd_write4(0x03, 0);
sleep_ms(5);
lcd_write4(0x03, 0);
sleep_us(150);
lcd_write4(0x03, 0);
sleep_us(150);
lcd_write4(0x02, 0);
sleep_us(150);
// Function set: 4-bit, 2 lines
lcd_send(0x28, 0);
// Display on, cursor off
lcd_send(0x0C, 0);
// Clear
lcd_send(0x01, 0);
sleep_ms(2);
// Entry mode set
lcd_send(0x06, 0);
}
void lcd_clear(void) {
lcd_send(0x01, 0);
sleep_ms(2);
}
void lcd_set_cursor(int line, int position) {
const uint8_t row_offsets[] = {0x00, 0x40};
if (line > 1) line = 1;
lcd_send(0x80 | (position + row_offsets[line]), 0);
}
void lcd_puts(const char *s) {
while (*s) {
lcd_send((uint8_t)*s++, 1);
}
}

74
0x0017_constants/lcd_1602.h Normal file
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@@ -0,0 +1,74 @@
/**
* @file lcd_1602.h
* @brief Header for PCF8574-backed HD44780 (16x2) LCD driver
* @author Kevin Thomas
* @date 2025
*
* MIT License
*
* Copyright (c) 2025 Kevin Thomas
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#ifndef LCD_1602_H
#define LCD_1602_H
#include <stdint.h>
#include "pico/stdlib.h"
#include "hardware/i2c.h"
/**
* @brief Initialize the LCD driver over I2C
*
* Configures the internal driver state and performs the HD44780 initialization
* sequence. The driver does not configure I2C pins or call i2c_init; that
* must be done by the caller prior to calling this function.
*
* @param i2c Pointer to the I2C instance (e.g. i2c0 or i2c1)
* @param pcf_addr PCF8574 I2C address (commonly 0x27 or 0x3F)
* @param nibble_shift Bit shift applied to 4-bit nibbles (commonly 4 or 0)
* @param backlight_mask PCF8574 bit mask that controls the backlight
*/
void lcd_i2c_init(i2c_inst_t *i2c, uint8_t pcf_addr, int nibble_shift, uint8_t backlight_mask);
/**
* @brief Clear the LCD display
*
* Clears the display and returns the cursor to the home position. This
* call blocks for the duration required by the HD44780 controller.
*/
void lcd_clear(void);
/**
* @brief Set the cursor position
*
* @param line Line number (0 or 1)
* @param position Column (0..15)
*/
void lcd_set_cursor(int line, int position);
/**
* @brief Write a null-terminated string to the display
*
* @param s The string to write (ASCII)
*/
void lcd_puts(const char *s);
#endif // LCD_1602_H

15
0x0017_constants/main.c
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@@ -1,15 +0,0 @@
#include <stdio.h>
#include "pico/stdlib.h"
#define FAV_NUM 42
const int OTHER_FAV_NUM = 1337;
int main(void) {
stdio_init_all();
while (true) {
printf("FAV_NUM: %d\r\n", FAV_NUM);
printf("regular_fav_num: %d\r\n", OTHER_FAV_NUM);
}
}

80
0x0017_constants/pico_sdk_import.cmake
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@@ -3,6 +3,28 @@
# This can be dropped into an external project to help locate this SDK
# It should be include()ed prior to project()
# Copyright 2020 (c) 2020 Raspberry Pi (Trading) Ltd.
#
# Redistribution and use in source and binary forms, with or without modification, are permitted provided that the
# following conditions are met:
#
# 1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following
# disclaimer.
#
# 2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following
# disclaimer in the documentation and/or other materials provided with the distribution.
#
# 3. Neither the name of the copyright holder nor the names of its contributors may be used to endorse or promote products
# derived from this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
# INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
# DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
# SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
# WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
if (DEFINED ENV{PICO_SDK_PATH} AND (NOT PICO_SDK_PATH))
set(PICO_SDK_PATH $ENV{PICO_SDK_PATH})
message("Using PICO_SDK_PATH from environment ('${PICO_SDK_PATH}')")
@@ -18,9 +40,20 @@ if (DEFINED ENV{PICO_SDK_FETCH_FROM_GIT_PATH} AND (NOT PICO_SDK_FETCH_FROM_GIT_P
message("Using PICO_SDK_FETCH_FROM_GIT_PATH from environment ('${PICO_SDK_FETCH_FROM_GIT_PATH}')")
endif ()
if (DEFINED ENV{PICO_SDK_FETCH_FROM_GIT_TAG} AND (NOT PICO_SDK_FETCH_FROM_GIT_TAG))
set(PICO_SDK_FETCH_FROM_GIT_TAG $ENV{PICO_SDK_FETCH_FROM_GIT_TAG})
message("Using PICO_SDK_FETCH_FROM_GIT_TAG from environment ('${PICO_SDK_FETCH_FROM_GIT_TAG}')")
endif ()
if (PICO_SDK_FETCH_FROM_GIT AND NOT PICO_SDK_FETCH_FROM_GIT_TAG)
set(PICO_SDK_FETCH_FROM_GIT_TAG "master")
message("Using master as default value for PICO_SDK_FETCH_FROM_GIT_TAG")
endif()
set(PICO_SDK_PATH "${PICO_SDK_PATH}" CACHE PATH "Path to the Raspberry Pi Pico SDK")
set(PICO_SDK_FETCH_FROM_GIT "${PICO_SDK_FETCH_FROM_GIT}" CACHE BOOL "Set to ON to fetch copy of SDK from git if not otherwise locatable")
set(PICO_SDK_FETCH_FROM_GIT_PATH "${PICO_SDK_FETCH_FROM_GIT_PATH}" CACHE FILEPATH "location to download SDK")
set(PICO_SDK_FETCH_FROM_GIT_TAG "${PICO_SDK_FETCH_FROM_GIT_TAG}" CACHE FILEPATH "release tag for SDK")
if (NOT PICO_SDK_PATH)
if (PICO_SDK_FETCH_FROM_GIT)
@@ -29,25 +62,40 @@ if (NOT PICO_SDK_PATH)
if (PICO_SDK_FETCH_FROM_GIT_PATH)
get_filename_component(FETCHCONTENT_BASE_DIR "${PICO_SDK_FETCH_FROM_GIT_PATH}" REALPATH BASE_DIR "${CMAKE_SOURCE_DIR}")
endif ()
# GIT_SUBMODULES_RECURSE was added in 3.17
if (${CMAKE_VERSION} VERSION_GREATER_EQUAL "3.17.0")
FetchContent_Declare(
pico_sdk
GIT_REPOSITORY https://github.com/raspberrypi/pico-sdk
GIT_TAG master
GIT_SUBMODULES_RECURSE FALSE
)
else ()
FetchContent_Declare(
pico_sdk
GIT_REPOSITORY https://github.com/raspberrypi/pico-sdk
GIT_TAG master
)
endif ()
FetchContent_Declare(
pico_sdk
GIT_REPOSITORY https://github.com/raspberrypi/pico-sdk
GIT_TAG ${PICO_SDK_FETCH_FROM_GIT_TAG}
)
if (NOT pico_sdk)
message("Downloading Raspberry Pi Pico SDK")
FetchContent_Populate(pico_sdk)
# GIT_SUBMODULES_RECURSE was added in 3.17
if (${CMAKE_VERSION} VERSION_GREATER_EQUAL "3.17.0")
FetchContent_Populate(
pico_sdk
QUIET
GIT_REPOSITORY https://github.com/raspberrypi/pico-sdk
GIT_TAG ${PICO_SDK_FETCH_FROM_GIT_TAG}
GIT_SUBMODULES_RECURSE FALSE
SOURCE_DIR ${FETCHCONTENT_BASE_DIR}/pico_sdk-src
BINARY_DIR ${FETCHCONTENT_BASE_DIR}/pico_sdk-build
SUBBUILD_DIR ${FETCHCONTENT_BASE_DIR}/pico_sdk-subbuild
)
else ()
FetchContent_Populate(
pico_sdk
QUIET
GIT_REPOSITORY https://github.com/raspberrypi/pico-sdk
GIT_TAG ${PICO_SDK_FETCH_FROM_GIT_TAG}
SOURCE_DIR ${FETCHCONTENT_BASE_DIR}/pico_sdk-src
BINARY_DIR ${FETCHCONTENT_BASE_DIR}/pico_sdk-build
SUBBUILD_DIR ${FETCHCONTENT_BASE_DIR}/pico_sdk-subbuild
)
endif ()
set(PICO_SDK_PATH ${pico_sdk_SOURCE_DIR})
endif ()
set(FETCHCONTENT_BASE_DIR ${FETCHCONTENT_BASE_DIR_SAVE})

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