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found and tested a library for communication with the bme280

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rasmus
2026-03-23 19:45:00 +01:00
parent b12c61d7b8
commit 359c04bf16
2 changed files with 26 additions and 17 deletions
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6
mein_projekt/CMakeLists.txt
View File

@@ -1,4 +1,5 @@
cmake_minimum_required(VERSION 3.13) cmake_minimum_required(VERSION 3.13)
set(PICO_BOARD pico_w)
set(CMAKE_EXPORT_COMPILE_COMMANDS ON) set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
set(PICO_SDK_PATH ${CMAKE_SOURCE_DIR}/../pico-sdk) set(PICO_SDK_PATH ${CMAKE_SOURCE_DIR}/../pico-sdk)
@@ -6,7 +7,6 @@ set(PICO_SDK_PATH ${CMAKE_SOURCE_DIR}/../pico-sdk)
# Pico SDK einbinden – MUSS vor project() stehen # Pico SDK einbinden – MUSS vor project() stehen
include(${PICO_SDK_PATH}/external/pico_sdk_import.cmake) include(${PICO_SDK_PATH}/external/pico_sdk_import.cmake)
set(PICO_BOARD pico_w)
project(mein_projekt C CXX ASM) project(mein_projekt C CXX ASM)
set(CMAKE_C_STANDARD 11) set(CMAKE_C_STANDARD 11)
@@ -14,6 +14,8 @@ set(CMAKE_CXX_STANDARD 17)
pico_sdk_init() pico_sdk_init()
add_subdirectory(../lib/bme280 bme280_build)
add_executable(mein_projekt add_executable(mein_projekt
main.cpp main.cpp
) )
@@ -26,7 +28,7 @@ pico_enable_stdio_uart(mein_projekt 0)
target_link_libraries(mein_projekt target_link_libraries(mein_projekt
pico_stdlib pico_stdlib
pico_cyw43_arch_none pico_cyw43_arch_none
hardware_i2c bme280
) )
# Erzeugt .uf2 Datei zum Flashen # Erzeugt .uf2 Datei zum Flashen

37
mein_projekt/main.cpp
View File

@@ -1,25 +1,32 @@
#include "bme280.h"
#include "hardware/i2c.h" #include "hardware/i2c.h"
#include "pico/cyw43_arch.h"
#include "pico/stdlib.h" #include "pico/stdlib.h"
#include <cstdio> #include <cstdio>
void check_i2c() { constexpr int i2cAddress{0x76};
uint8_t buffer;
for (int addr{0x08}; addr < 0x78; addr++) {
if (i2c_read_blocking(i2c0, addr, &buffer, 1, false) > 0) {
printf("Adresse: %02X\n", addr);
}
}
}
int main() { int main() {
sleep_ms(3000);
stdio_init_all(); stdio_init_all();
i2c_init(i2c0, 400 * 1000); sleep_ms(3000);
gpio_set_function(0, GPIO_FUNC_I2C); // SDA cyw43_arch_init();
gpio_set_function(1, GPIO_FUNC_I2C); // SCL
gpio_pull_up(0); bme280_handle_t handle;
gpio_pull_up(1); int result{bme280_init(&handle, i2cAddress, INTERVAL_1000MS)};
printf("I2C scan...\n");
for (uint8_t addr = 0x08; addr < 0x78; addr++) {
uint8_t dummy;
int ret = i2c_read_blocking(i2c1, addr, &dummy, 1, false);
if (ret >= 0) {
printf("Gefunden: 0x%02X\n", addr);
}
}
while (true) { while (true) {
check_i2c(); int result{bme280_init(&handle, i2cAddress, INTERVAL_1000MS)};
printf("Init result: %d\n", result);
bme280_read_data(handle);
printf("%s\n", bme280_get_json(handle));
sleep_ms(3000);
} }
} }