From e69362c8edfc7023367e0c454faa79383c657223 Mon Sep 17 00:00:00 2001 From: Maximilian Friedersdorff Date: Sun, 31 Oct 2021 15:26:17 +0000 Subject: [PATCH] Initial commit --- CMakeLists.txt | 16 +++++++ pdu.c | 103 ++++++++++++++++++++++++++++++++++++++++++ pico_sdk_import.cmake | 62 +++++++++++++++++++++++++ uart.c | 36 +++++++++++++++ uart.h | 11 +++++ 5 files changed, 228 insertions(+) create mode 100644 CMakeLists.txt create mode 100644 pdu.c create mode 100644 pico_sdk_import.cmake create mode 100644 uart.c create mode 100644 uart.h diff --git a/CMakeLists.txt b/CMakeLists.txt new file mode 100644 index 0000000..3c82e70 --- /dev/null +++ b/CMakeLists.txt @@ -0,0 +1,16 @@ +cmake_minimum_required(VERSION 3.13) + +include(pico_sdk_import.cmake) + +project(lanthanide_pdu) + +pico_sdk_init() + + +add_executable(pdu + pdu.c + uart.h + uart.c +) + +target_link_libraries(pdu pico_stdlib) diff --git a/pdu.c b/pdu.c new file mode 100644 index 0000000..4e33d18 --- /dev/null +++ b/pdu.c @@ -0,0 +1,103 @@ +#include +#include + +#include "uart.h" +#include "pico/stdlib.h" +#include "hardware/uart.h" + +#define UART_ID uart0 +#define DATA_BITS 8 +#define STOP_BITS 1 +#define PARITY UART_PARITY_NONE + +#define UART_TX_PIN 16 +#define UART_RX_PIN 17 + +#define MAX_COMMAND_LENGTH 32 + +#define PINA 6 +#define PINB 7 +#define PINC 8 +#define PIND 9 + + +void set_power_state(char relay, bool on) { + uint state; + if (on) + state = 0; + else + state = 1; + + uint pin; + switch (relay) { + case 'a' : + pin = PINA; + break; + case 'b' : + pin = PINB; + break; + case 'c' : + pin = PINC; + break; + case 'd' : + pin = PIND; + break; + } + + gpio_put(pin, state); +} + +int main() { + char command_string[MAX_COMMAND_LENGTH + 1]; + command_string[0] = 0; + uint command_len = 0; + + uart_init(UART_ID, 9600); + gpio_set_function(UART_TX_PIN, GPIO_FUNC_UART); + gpio_set_function(UART_RX_PIN, GPIO_FUNC_UART); + + uart_set_hw_flow(UART_ID, false, false); + uart_set_format(UART_ID, DATA_BITS, STOP_BITS, PARITY); + + gpio_init(PINA); + gpio_init(PINB); + gpio_init(PINC); + gpio_init(PIND); + + gpio_set_dir(PINA, GPIO_OUT); + gpio_set_dir(PINB, GPIO_OUT); + gpio_set_dir(PINC, GPIO_OUT); + gpio_set_dir(PIND, GPIO_OUT); + + gpio_put(PINA, 1); + gpio_put(PINB, 1); + gpio_put(PINC, 1); + gpio_put(PIND, 1); + + bool eol; + char word[9]; + char relay; + while (true) { + read_word(UART_ID, word, 9, &eol); + + if (strcmp(word, "on") == 0) { + if (eol) { + uart_puts(UART_ID, "Missing argument: n"); + continue; + } + relay = uart_getc(UART_ID); + finish_line(UART_ID); + set_power_state(relay, true); + } else if (strcmp(word, "off") == 0) { + if (eol) { + uart_puts(UART_ID, "Missing argument: n"); + continue; + } + relay = uart_getc(UART_ID); + finish_line(UART_ID); + set_power_state(relay, false); + } else if (strcmp(word, "temps") == 0) { + uart_puts(UART_ID, "Not implemented yet"); + } + } +} diff --git a/pico_sdk_import.cmake b/pico_sdk_import.cmake new file mode 100644 index 0000000..28efe9e --- /dev/null +++ b/pico_sdk_import.cmake @@ -0,0 +1,62 @@ +# This is a copy of /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 () + +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") + +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 () + FetchContent_Declare( + pico_sdk + GIT_REPOSITORY https://github.com/raspberrypi/pico-sdk + GIT_TAG master + ) + 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}) diff --git a/uart.c b/uart.c new file mode 100644 index 0000000..a3094e0 --- /dev/null +++ b/uart.c @@ -0,0 +1,36 @@ +#include "uart.h" +#include "hardware/uart.h" + +bool is_whitespace(char character) { + switch (character) { + case ' ' : + case '\n' : + case '\t' : + return true; + default : + return false; + } +} + +void read_word(uart_inst_t *uart, char *buffer, int buffersize, bool *eol) { + for (uint i == 0; i < buffersize - 1; ++i) { + buffer[i] = uart_getc(uart); + if (is_whitespace(buffer[i])) { + buffer[i + 1] = '\0' + } + } + + char last_char; + do { + last_char = uart_getc(uart); + } while (is_whitespace(last_char)); + + buffer[buffersize - 1] = '\0'; +} + +void finish_line(uart_inst_t *uart) { + char last_char; + do { + last_char = uart_getc(uart); + } while (last_char != '\n'); +} diff --git a/uart.h b/uart.h new file mode 100644 index 0000000..f851a4c --- /dev/null +++ b/uart.h @@ -0,0 +1,11 @@ +#ifndef LANTHANIDE_UART +#define LANTHANIDE_UART + +#include "pico/stdlib.h" + +bool is_whitespace(char character); +void read_word(uart_inst_t *uart, char *buffer, int buffersize, bool *eol); +void finish_line(uart_inst_t *uart); + + +#endif -- 2.46.2