pt100-pico

C program for interface with a PT100 thermocouple, via a MAX31586 amplifier board.

Wiring

standard pi pico SPI pins are, GPIO16, GPIO17, GPIO18, GPIO19.

GPIO16 = MISO_SDO //Peripheral out, Controller in

GPIO17 = CSB //Chip Select BAR (Active Low)

GPIO18 = SCLK //System Clock

GPIO19 = MOSI_SDI //Controller out, Peripheral in

---

MAX31865 Hookup

GPIO16 --> SDO

GPIO17 --> CS

GPIO18 --> CLK

GPIO19 --> SDI

---

Compile with Pico C/C++ SDK

ENSURE YOU HAVE CLONED THE C/C++ SDK REPO ON TO YOUR MACHINE

Project creation

mkdir <project name> && cd "$_"

--This repo has a relevant CMakeList in the repo, but should you fork or make changes, the following steps is how to create from scratch--

copy the pico_sdk_import.cmake into you project directory

cp pico-sdk/external/pico_sdk_import.cmake <project repo here>

Create CMakeList.txt file and copy in the following boilerplate text,

touch CMakeLists.txt

cmake_minimum_required(VERSION 3.13)

include(pico_sdk_import.cmake)

project(<insert project name here> C CXX ASM)
set(CMAKE_C_STANDARD 11)
set(CMAKE_CXX_STANDARD 17)

# Initiate the SDK
pico_sdk_init()

add_executable(<insert desired executable name here>
	<insert C program name here>
)

pico_enable_stdio_usb(<insert desired executable name here> 1)

#create map/bin/hex/uf2 files etc.
pico_add_extra_outputs(<insert desired executable name here> 1)

# Pull in pico_stdlib, or other required libraries
target_link_libraries(<insert desired executable name here> pico_stdlib)

Compile uf2 with Cmake

-- Execute from inside project directory --

mkdir build && cd "$_"

export PICO_SDK_PATH=<path to pico sdk directory>

cmake ..

make

Copy the .uf2 file to the pico.