humble beginnings
This commit is contained in:
commit
ef42b36fe5
1
.gitignore
vendored
Normal file
1
.gitignore
vendored
Normal file
@ -0,0 +1 @@
|
||||
build
|
||||
22
.vscode/c_cpp_properties.json
vendored
Normal file
22
.vscode/c_cpp_properties.json
vendored
Normal file
@ -0,0 +1,22 @@
|
||||
{
|
||||
"configurations": [
|
||||
{
|
||||
"name": "Pico",
|
||||
"includePath": [
|
||||
"${workspaceFolder}/**",
|
||||
"${userHome}/.pico-sdk/sdk/2.0.0/**"
|
||||
],
|
||||
"forcedInclude": [
|
||||
"${userHome}/.pico-sdk/sdk/2.0.0/src/common/pico_base_headers/include/pico.h",
|
||||
"${workspaceFolder}/build/generated/pico_base/pico/config_autogen.h"
|
||||
],
|
||||
"defines": [],
|
||||
"compilerPath": "${userHome}/.pico-sdk/toolchain/13_2_Rel1/bin/arm-none-eabi-gcc",
|
||||
"compileCommands": "${workspaceFolder}/build/compile_commands.json",
|
||||
"cStandard": "c17",
|
||||
"cppStandard": "c++14",
|
||||
"intelliSenseMode": "linux-gcc-arm"
|
||||
}
|
||||
],
|
||||
"version": 4
|
||||
}
|
||||
16
.vscode/cmake-kits.json
vendored
Normal file
16
.vscode/cmake-kits.json
vendored
Normal file
@ -0,0 +1,16 @@
|
||||
[
|
||||
{
|
||||
"name": "Pico",
|
||||
"compilers": {
|
||||
"C": "${userHome}/.pico-sdk/toolchain/13_2_Rel1/bin/arm-none-eabi-gcc",
|
||||
"CXX": "${userHome}/.pico-sdk/toolchain/13_2_Rel1/bin/arm-none-eabi-gcc"
|
||||
},
|
||||
"toolchainFile": "${env:HOME}/.pico-sdk/sdk/2.0.0/cmake/preload/toolchains/pico_arm_cortex_m0plus_gcc.cmake",
|
||||
"environmentVariables": {
|
||||
"PATH": "${command:raspberry-pi-pico.getEnvPath};${env:PATH}"
|
||||
},
|
||||
"cmakeSettings": {
|
||||
"Python3_EXECUTABLE": "${command:raspberry-pi-pico.getPythonPath}"
|
||||
}
|
||||
}
|
||||
]
|
||||
9
.vscode/extensions.json
vendored
Normal file
9
.vscode/extensions.json
vendored
Normal file
@ -0,0 +1,9 @@
|
||||
{
|
||||
"recommendations": [
|
||||
"marus25.cortex-debug",
|
||||
"ms-vscode.cpptools",
|
||||
"ms-vscode.cpptools-extension-pack",
|
||||
"ms-vscode.vscode-serial-monitor",
|
||||
"raspberry-pi.raspberry-pi-pico",
|
||||
]
|
||||
}
|
||||
69
.vscode/launch.json
vendored
Normal file
69
.vscode/launch.json
vendored
Normal file
@ -0,0 +1,69 @@
|
||||
{
|
||||
"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": "${userHome}/.pico-sdk/sdk/2.0.0/src/${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": "${userHome}/.pico-sdk/sdk/2.0.0/src/${command:raspberry-pi-pico.getChip}/hardware_regs/${command:raspberry-pi-pico.getChipUppercase}.svd",
|
||||
"runToEntryPoint": "main",
|
||||
// Give restart the same functionality as runToEntryPoint - main
|
||||
"postRestartCommands": [
|
||||
"break main",
|
||||
"continue"
|
||||
]
|
||||
},
|
||||
{
|
||||
"name": "Pico Debug (C++ Debugger)",
|
||||
"type": "cppdbg",
|
||||
"request": "launch",
|
||||
"cwd": "${workspaceRoot}",
|
||||
"program": "${command:raspberry-pi-pico.launchTargetPath}",
|
||||
"MIMode": "gdb",
|
||||
"miDebuggerPath": "${command:raspberry-pi-pico.getGDBPath}",
|
||||
"miDebuggerServerAddress": "localhost:3333",
|
||||
"debugServerPath": "${userHome}/.pico-sdk/openocd/0.12.0+dev/openocd.exe",
|
||||
"debugServerArgs": "-f interface/cmsis-dap.cfg -f target/${command:raspberry-pi-pico.getTarget}.cfg -c \"adapter speed 5000\"",
|
||||
"serverStarted": "Listening on port .* for gdb connections",
|
||||
"filterStderr": true,
|
||||
"hardwareBreakpoints": {
|
||||
"require": true,
|
||||
"limit": 4
|
||||
},
|
||||
"preLaunchTask": "Flash",
|
||||
"svdPath": "${userHome}/.pico-sdk/sdk/2.0.0/src/${command:raspberry-pi-pico.getChip}/hardware_regs/${command:raspberry-pi-pico.getChipUppercase}.svd"
|
||||
},
|
||||
]
|
||||
}
|
||||
39
.vscode/settings.json
vendored
Normal file
39
.vscode/settings.json
vendored
Normal file
@ -0,0 +1,39 @@
|
||||
{
|
||||
"cmake.options.statusBarVisibility": "hidden",
|
||||
"cmake.options.advanced": {
|
||||
"build": {
|
||||
"statusBarVisibility": "hidden"
|
||||
},
|
||||
"launch": {
|
||||
"statusBarVisibility": "hidden"
|
||||
},
|
||||
"debug": {
|
||||
"statusBarVisibility": "hidden"
|
||||
}
|
||||
},
|
||||
"cmake.configureOnEdit": false,
|
||||
"cmake.automaticReconfigure": false,
|
||||
"cmake.configureOnOpen": false,
|
||||
"cmake.generator": "Ninja",
|
||||
"cmake.cmakePath": "cmake",
|
||||
"C_Cpp.debugShortcut": false,
|
||||
"terminal.integrated.env.windows": {
|
||||
"PICO_SDK_PATH": "${env:USERPROFILE}/.pico-sdk/sdk/2.0.0",
|
||||
"PICO_TOOLCHAIN_PATH": "${env:USERPROFILE}/.pico-sdk/toolchain/13_2_Rel1",
|
||||
"Path": "${env:USERPROFILE}/.pico-sdk/toolchain/13_2_Rel1/bin;${env:USERPROFILE}/.pico-sdk/picotool/2.0.0/picotool;;${env:USERPROFILE}/.pico-sdk/ninja/v1.12.1;${env:PATH}"
|
||||
},
|
||||
"terminal.integrated.env.osx": {
|
||||
"PICO_SDK_PATH": "${env:HOME}/.pico-sdk/sdk/2.0.0",
|
||||
"PICO_TOOLCHAIN_PATH": "${env:HOME}/.pico-sdk/toolchain/13_2_Rel1",
|
||||
"PATH": "${env:HOME}/.pico-sdk/toolchain/13_2_Rel1/bin:${env:HOME}/.pico-sdk/picotool/2.0.0/picotool::${env:HOME}/.pico-sdk/ninja/v1.12.1:${env:PATH}"
|
||||
},
|
||||
"terminal.integrated.env.linux": {
|
||||
"PICO_SDK_PATH": "${env:HOME}/.pico-sdk/sdk/2.0.0",
|
||||
"PICO_TOOLCHAIN_PATH": "${env:HOME}/.pico-sdk/toolchain/13_2_Rel1",
|
||||
"PATH": "${env:HOME}/.pico-sdk/toolchain/13_2_Rel1/bin:${env:HOME}/.pico-sdk/picotool/2.0.0/picotool::${env:HOME}/.pico-sdk/ninja/v1.12.1:${env:PATH}"
|
||||
},
|
||||
"raspberry-pi-pico.cmakeAutoConfigure": true,
|
||||
"raspberry-pi-pico.useCmakeTools": false,
|
||||
"raspberry-pi-pico.cmakePath": "cmake",
|
||||
"raspberry-pi-pico.ninjaPath": "${HOME}/.pico-sdk/ninja/v1.12.1/ninja"
|
||||
}
|
||||
58
.vscode/tasks.json
vendored
Normal file
58
.vscode/tasks.json
vendored
Normal file
@ -0,0 +1,58 @@
|
||||
{
|
||||
"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": "${env:HOME}/.pico-sdk/picotool/2.0.0/picotool/picotool",
|
||||
"args": [
|
||||
"load",
|
||||
"${command:raspberry-pi-pico.launchTargetPath}",
|
||||
"-fx"
|
||||
],
|
||||
"presentation": {
|
||||
"reveal": "always",
|
||||
"panel": "dedicated"
|
||||
},
|
||||
"problemMatcher": [],
|
||||
"windows": {
|
||||
"command": "${env:USERPROFILE}/.pico-sdk/picotool/2.0.0/picotool/picotool.exe"
|
||||
}
|
||||
},
|
||||
{
|
||||
"label": "Flash",
|
||||
"type": "process",
|
||||
"command": "${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",
|
||||
}
|
||||
}
|
||||
]
|
||||
}
|
||||
64
CMakeLists.txt
Normal file
64
CMakeLists.txt
Normal file
@ -0,0 +1,64 @@
|
||||
# Generated Cmake Pico project file
|
||||
|
||||
cmake_minimum_required(VERSION 3.13)
|
||||
|
||||
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 NEVER EDIT THE NEXT LINES for Raspberry Pi Pico VS Code Extension to work ==
|
||||
if(WIN32)
|
||||
set(USERHOME $ENV{USERPROFILE})
|
||||
else()
|
||||
set(USERHOME $ENV{HOME})
|
||||
endif()
|
||||
set(sdkVersion 2.0.0)
|
||||
set(toolchainVersion 13_2_Rel1)
|
||||
set(picotoolVersion 2.0.0)
|
||||
set(picoVscode ${USERHOME}/.pico-sdk/cmake/pico-vscode.cmake)
|
||||
if (EXISTS ${picoVscode})
|
||||
include(${picoVscode})
|
||||
endif()
|
||||
# ====================================================================================
|
||||
set(PICO_BOARD pico_w CACHE STRING "Board type")
|
||||
|
||||
# Pull in Raspberry Pi Pico SDK (must be before project)
|
||||
include(pico_sdk_import.cmake)
|
||||
|
||||
project(sensors C CXX ASM)
|
||||
|
||||
# Initialise the Raspberry Pi Pico SDK
|
||||
pico_sdk_init()
|
||||
|
||||
# Add executable. Default name is the project name, version 0.1
|
||||
|
||||
add_executable(sensors sensors.cpp )
|
||||
|
||||
pico_set_program_name(sensors "sensors")
|
||||
pico_set_program_version(sensors "0.1")
|
||||
|
||||
# Modify the below lines to enable/disable output over UART/USB
|
||||
pico_enable_stdio_uart(sensors 0)
|
||||
pico_enable_stdio_usb(sensors 1)
|
||||
|
||||
# Add the standard library to the build
|
||||
target_link_libraries(sensors
|
||||
pico_stdlib)
|
||||
|
||||
# Add the standard include files to the build
|
||||
target_include_directories(sensors PRIVATE
|
||||
${CMAKE_CURRENT_LIST_DIR}
|
||||
${CMAKE_CURRENT_LIST_DIR}/.. # for our common lwipopts or any other standard includes, if required
|
||||
)
|
||||
|
||||
# Add any user requested libraries
|
||||
target_link_libraries(sensors
|
||||
hardware_i2c
|
||||
hardware_pwm
|
||||
)
|
||||
|
||||
pico_add_extra_outputs(sensors)
|
||||
|
||||
84
pico_sdk_import.cmake
Normal file
84
pico_sdk_import.cmake
Normal file
@ -0,0 +1,84 @@
|
||||
# This is a copy of <PICO_SDK_PATH>/external/pico_sdk_import.cmake
|
||||
|
||||
# This can be dropped into an external project to help locate this SDK
|
||||
# It should be include()ed prior to project()
|
||||
|
||||
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}')")
|
||||
endif ()
|
||||
|
||||
if (DEFINED ENV{PICO_SDK_FETCH_FROM_GIT} AND (NOT PICO_SDK_FETCH_FROM_GIT))
|
||||
set(PICO_SDK_FETCH_FROM_GIT $ENV{PICO_SDK_FETCH_FROM_GIT})
|
||||
message("Using PICO_SDK_FETCH_FROM_GIT from environment ('${PICO_SDK_FETCH_FROM_GIT}')")
|
||||
endif ()
|
||||
|
||||
if (DEFINED ENV{PICO_SDK_FETCH_FROM_GIT_PATH} AND (NOT PICO_SDK_FETCH_FROM_GIT_PATH))
|
||||
set(PICO_SDK_FETCH_FROM_GIT_PATH $ENV{PICO_SDK_FETCH_FROM_GIT_PATH})
|
||||
message("Using PICO_SDK_FETCH_FROM_GIT_PATH from environment ('${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)
|
||||
include(FetchContent)
|
||||
set(FETCHCONTENT_BASE_DIR_SAVE ${FETCHCONTENT_BASE_DIR})
|
||||
if (PICO_SDK_FETCH_FROM_GIT_PATH)
|
||||
get_filename_component(FETCHCONTENT_BASE_DIR "${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 ${PICO_SDK_FETCH_FROM_GIT_TAG}
|
||||
GIT_SUBMODULES_RECURSE FALSE
|
||||
)
|
||||
else ()
|
||||
FetchContent_Declare(
|
||||
pico_sdk
|
||||
GIT_REPOSITORY https://github.com/raspberrypi/pico-sdk
|
||||
GIT_TAG ${PICO_SDK_FETCH_FROM_GIT_TAG}
|
||||
)
|
||||
endif ()
|
||||
|
||||
if (NOT pico_sdk)
|
||||
message("Downloading Raspberry Pi Pico SDK")
|
||||
FetchContent_Populate(pico_sdk)
|
||||
set(PICO_SDK_PATH ${pico_sdk_SOURCE_DIR})
|
||||
endif ()
|
||||
set(FETCHCONTENT_BASE_DIR ${FETCHCONTENT_BASE_DIR_SAVE})
|
||||
else ()
|
||||
message(FATAL_ERROR
|
||||
"SDK location was not specified. Please set PICO_SDK_PATH or set PICO_SDK_FETCH_FROM_GIT to on to fetch from git."
|
||||
)
|
||||
endif ()
|
||||
endif ()
|
||||
|
||||
get_filename_component(PICO_SDK_PATH "${PICO_SDK_PATH}" REALPATH BASE_DIR "${CMAKE_BINARY_DIR}")
|
||||
if (NOT EXISTS ${PICO_SDK_PATH})
|
||||
message(FATAL_ERROR "Directory '${PICO_SDK_PATH}' not found")
|
||||
endif ()
|
||||
|
||||
set(PICO_SDK_INIT_CMAKE_FILE ${PICO_SDK_PATH}/pico_sdk_init.cmake)
|
||||
if (NOT EXISTS ${PICO_SDK_INIT_CMAKE_FILE})
|
||||
message(FATAL_ERROR "Directory '${PICO_SDK_PATH}' does not appear to contain the Raspberry Pi Pico SDK")
|
||||
endif ()
|
||||
|
||||
set(PICO_SDK_PATH ${PICO_SDK_PATH} CACHE PATH "Path to the Raspberry Pi Pico SDK" FORCE)
|
||||
|
||||
include(${PICO_SDK_INIT_CMAKE_FILE})
|
||||
198
sensors.cpp
Normal file
198
sensors.cpp
Normal file
@ -0,0 +1,198 @@
|
||||
#include <stdio.h>
|
||||
#include "pico/stdlib.h"
|
||||
#include "hardware/i2c.h"
|
||||
#include "hardware/pwm.h"
|
||||
#include "hardware/clocks.h"
|
||||
|
||||
// I2C defines
|
||||
// This example will use I2C0 on GPIO8 (SDA) and GPIO9 (SCL) running at 400KHz.
|
||||
// Pins can be changed, see the GPIO function select table in the datasheet for information on GPIO assignments
|
||||
#define I2C_PORT i2c0
|
||||
#define I2C_SDA 8
|
||||
#define I2C_SCL 9
|
||||
|
||||
#define CO2_PIN 5
|
||||
|
||||
void measure_freqs(void) {
|
||||
uint f_pll_sys = frequency_count_khz(CLOCKS_FC0_SRC_VALUE_PLL_SYS_CLKSRC_PRIMARY);
|
||||
uint f_pll_usb = frequency_count_khz(CLOCKS_FC0_SRC_VALUE_PLL_USB_CLKSRC_PRIMARY);
|
||||
uint f_rosc = frequency_count_khz(CLOCKS_FC0_SRC_VALUE_ROSC_CLKSRC);
|
||||
uint f_clk_sys = frequency_count_khz(CLOCKS_FC0_SRC_VALUE_CLK_SYS);
|
||||
uint f_clk_peri = frequency_count_khz(CLOCKS_FC0_SRC_VALUE_CLK_PERI);
|
||||
uint f_clk_usb = frequency_count_khz(CLOCKS_FC0_SRC_VALUE_CLK_USB);
|
||||
uint f_clk_adc = frequency_count_khz(CLOCKS_FC0_SRC_VALUE_CLK_ADC);
|
||||
uint f_clk_rtc = frequency_count_khz(CLOCKS_FC0_SRC_VALUE_CLK_RTC);
|
||||
|
||||
printf("pll_sys = %dkHz\n", f_pll_sys);
|
||||
printf("pll_usb = %dkHz\n", f_pll_usb);
|
||||
printf("rosc = %dkHz\n", f_rosc);
|
||||
printf("clk_sys = %dkHz\n", f_clk_sys);
|
||||
printf("clk_peri = %dkHz\n", f_clk_peri);
|
||||
printf("clk_usb = %dkHz\n", f_clk_usb);
|
||||
printf("clk_adc = %dkHz\n", f_clk_adc);
|
||||
printf("clk_rtc = %dkHz\n", f_clk_rtc);
|
||||
|
||||
// Can't measure clk_ref / xosc as it is the ref
|
||||
}
|
||||
|
||||
float measure_co2(float *max, float *c) {
|
||||
// Only the PWM B pins can be used as inputs.
|
||||
assert(pwm_gpio_to_channel(CO2_PIN) == PWM_CHAN_B);
|
||||
uint slice_num = pwm_gpio_to_slice_num(CO2_PIN);
|
||||
|
||||
|
||||
// Count once for every 2000 cycles the PWM B input is high
|
||||
pwm_config cfg = pwm_get_default_config();
|
||||
// pwm_config_set_wrap(&cfg, 64000);
|
||||
pwm_config_set_clkdiv_mode(&cfg, PWM_DIV_B_HIGH);
|
||||
pwm_config_set_clkdiv(&cfg, 2000);
|
||||
pwm_init(slice_num, &cfg, false);
|
||||
pwm_set_counter(slice_num, 0);
|
||||
gpio_set_function(CO2_PIN, GPIO_FUNC_PWM);
|
||||
|
||||
pwm_set_enabled(slice_num, true);
|
||||
sleep_ms(1004);
|
||||
pwm_set_enabled(slice_num, false);
|
||||
float count = pwm_get_counter(slice_num);
|
||||
float counting_rate = clock_get_hz(clk_sys) / 2000.0;
|
||||
float max_possible_count = counting_rate * 1.002;
|
||||
//return count;
|
||||
*max = max_possible_count;
|
||||
*c = count;
|
||||
return 2000.0 * count / max_possible_count;
|
||||
|
||||
// co2 = 2000.0*(TH-2ms)/(TH+TL-4ms)
|
||||
}
|
||||
|
||||
// I2C reserves some addresses for special purposes. We exclude these from the scan.
|
||||
// These are any addresses of the form 000 0xxx or 111 1xxx
|
||||
bool reserved_addr(uint8_t addr) {
|
||||
return (addr & 0x78) == 0 || (addr & 0x78) == 0x78;
|
||||
}
|
||||
|
||||
void i2cscan()
|
||||
{
|
||||
printf("\nI2C Bus Scan\n");
|
||||
printf(" 0 1 2 3 4 5 6 7 8 9 A B C D E F\n");
|
||||
|
||||
for (int addr = 0; addr < (1 << 7); ++addr) {
|
||||
if (addr % 16 == 0) {
|
||||
printf("%02x ", addr);
|
||||
}
|
||||
|
||||
// Perform a 1-byte dummy read from the probe address. If a slave
|
||||
// acknowledges this address, the function returns the number of bytes
|
||||
// transferred. If the address byte is ignored, the function returns
|
||||
// -1.
|
||||
|
||||
// Skip over any reserved addresses.
|
||||
int ret;
|
||||
uint8_t rxdata;
|
||||
if (reserved_addr(addr))
|
||||
ret = PICO_ERROR_GENERIC;
|
||||
else
|
||||
ret = i2c_read_blocking(I2C_PORT, addr, &rxdata, 1, true);
|
||||
|
||||
printf(ret < 0 ? "." : "@");
|
||||
printf(addr % 16 == 15 ? "\n" : " ");
|
||||
}
|
||||
|
||||
|
||||
}
|
||||
|
||||
int measure_i2c_co2(float *co2, float *temp, float *rh) {
|
||||
uint8_t has_measurement[] = {0xE4, 0xB8};
|
||||
uint8_t read_measurement[] = {0xEC, 0x05};
|
||||
uint8_t data[9];
|
||||
int count;
|
||||
|
||||
*co2 = 0;
|
||||
*temp = 0;
|
||||
*rh = 0;
|
||||
|
||||
if ((count = i2c_write_blocking(I2C_PORT, 0x62, has_measurement, 2, false)) != 2) {
|
||||
*co2 = count;
|
||||
return 1;
|
||||
}
|
||||
|
||||
if ((count = i2c_read_blocking(I2C_PORT, 0x62, data, 3, false)) != 3 ||
|
||||
(data[2] == 0 && data[1] == 0 && data[0] & 0x7 == 0)) {
|
||||
|
||||
*co2 = count;
|
||||
printf(" data: %b %b %b", data[2], data[1], data[0]);
|
||||
return 2;
|
||||
}
|
||||
|
||||
if ((count = i2c_write_blocking(I2C_PORT, 0x62, read_measurement, 2, false)) != 2) {
|
||||
*co2 = count;
|
||||
return 3;
|
||||
}
|
||||
|
||||
if ((count = i2c_read_blocking(I2C_PORT, 0x62, data, 9, false)) != 9) {
|
||||
*co2 = count;
|
||||
return 4;
|
||||
}
|
||||
|
||||
*co2 = data[0] * 256.0 + data[1];
|
||||
*temp = -45.0 + 175.0 * (data[3] * 256.0 + data[4]) / 0xFFFF;
|
||||
*rh = 100 * (data[6] * 256.0 + data[7]) / 0xFFFF;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
int main()
|
||||
{
|
||||
stdio_usb_init();
|
||||
|
||||
// I2C Initialisation. Using it at 100Khz.
|
||||
i2c_init(I2C_PORT, 400*1000);
|
||||
|
||||
gpio_set_function(I2C_SDA, GPIO_FUNC_I2C);
|
||||
gpio_set_function(I2C_SCL, GPIO_FUNC_I2C);
|
||||
// gpio_init(CO2_PIN);
|
||||
// gpio_set_dir(CO2_PIN, GPIO_OUT);
|
||||
|
||||
gpio_pull_up(I2C_SDA);
|
||||
gpio_pull_up(I2C_SCL);
|
||||
// For more examples of I2C use see https://github.com/raspberrypi/pico-examples/tree/master/i2c
|
||||
|
||||
// get clock of RPI
|
||||
|
||||
int slice = pwm_gpio_to_slice_num(0);
|
||||
pwm_config config = pwm_get_default_config();
|
||||
|
||||
//bi_decl(bi_2pins_with_func(PICO_DEFAULT_I2C_SDA_PIN,
|
||||
//PICO_DEFAULT_I2C_SCL_PIN, GPIO_FUNC_I2C));
|
||||
|
||||
int w = i2c_write_blocking(I2C_PORT, 0x62, (const uint8_t*)"\x21\xb1", 2, false);
|
||||
sleep_ms(5000);
|
||||
printf("bytes written on init: %d\n", w);
|
||||
|
||||
|
||||
bool on = false;
|
||||
while (true) {
|
||||
// measure_freqs();aa
|
||||
|
||||
float c, m;
|
||||
float co2 = measure_co2(&m, &c);
|
||||
// i2cscan();
|
||||
printf("Hello CO2: %f %f / %f\n", co2, c, m);
|
||||
|
||||
|
||||
/*
|
||||
float temp1, h1;
|
||||
|
||||
|
||||
float temp2, h2;
|
||||
*/
|
||||
float temp, rh;
|
||||
int r = measure_i2c_co2(&co2, &temp, &rh);
|
||||
printf(" %d -- ac. CO2: %f T: %f RH: %f\n", r, co2, temp, rh);
|
||||
|
||||
|
||||
//gpio_put(CO2_PIN, on);
|
||||
//printf("pin is %d\n", (int)on);
|
||||
//on = !on;
|
||||
sleep_ms(5000);
|
||||
}
|
||||
}
|
||||
Loading…
x
Reference in New Issue
Block a user