Console with persistant storage.

Core/Inc/NVmem.h

@@ -0,0 +1,29 @@
+/**
+*********************************************************************
+*
+* @file    NVmem.h
+* @brief
+*
+* @date    2024-07-13 12:24:17
+* @author  CT
+*
+* @details
+*
+*************************************************************************
+**/
+
+#ifndef _NVMEM_H_
+#define _NVMEM_H_
+
+#include <stdint.h>
+
+#define WRITE_TIMEOUT       (6000u) // 6s
+#define NVMEM_SIZE          (2048u) // in bytes
+
+int32_t NVmem_init(void);
+void NVmem_service(void);
+int32_t NVmem_write(uint8_t* data, uint32_t addr, uint32_t len);
+int32_t NVmem_write_immediate(uint8_t* data, uint32_t addr, uint32_t len);
+int32_t NVmem_read(uint8_t* data,  uint32_t addr, uint32_t len);
+
+#endif  // _NVMEM_H_

Core/Inc/cir_buf.h

@@ -16,6 +16,78 @@
 #ifndef _CIR_BUF_H_
 #define _CIR_BUF_H_
 
+#include <stdbool.h>
+#include <stdint.h>
+#include <stddef.h>
+
+/// Opaque circular buffer structure
+typedef struct circular_buf_t circular_buf_t;
+
+/// Handle type, the way users interact with the API
+typedef circular_buf_t* cbuf_handle_t;
+
+/// Pass in a storage buffer and size, returns a circular buffer handle
+/// Requires: buffer is not NULL, size > 0 (size > 1 for the threadsafe
+//  version, because it holds size - 1 elements)
+/// Ensures: me has been created and is returned in an empty state
+cbuf_handle_t circular_buf_init(uint8_t* buffer, size_t size);
+
+/// Free a circular buffer structure
+/// Requires: me is valid and created by circular_buf_init
+/// Does not free data buffer; owner is responsible for that
+void circular_buf_free(cbuf_handle_t me);
+
+/// Reset the circular buffer to empty, head == tail. Data not cleared
+/// Requires: me is valid and created by circular_buf_init
+void circular_buf_reset(cbuf_handle_t me);
+
+/// Put that continues to add data if the buffer is full
+/// Old data is overwritten
+/// Note: if you are using the threadsafe version, this API cannot be used, because
+/// it modifies the tail pointer in some cases. Use circular_buf_try_put instead.
+/// Requires: me is valid and created by circular_buf_init
+void circular_buf_put(cbuf_handle_t me, uint8_t data);
+
+/// Put that rejects new data if the buffer is full
+/// Note: if you are using the threadsafe version, *this* is the put you should use
+/// Requires: me is valid and created by circular_buf_init
+/// Returns 0 on success, -1 if buffer is full
+int circular_buf_try_put(cbuf_handle_t me, uint8_t data);
+
+/// Retrieve a value from the buffer
+/// Requires: me is valid and created by circular_buf_init
+/// Returns 0 on success, -1 if the buffer is empty
+int circular_buf_get(cbuf_handle_t me, uint8_t* data);
+
+/// Checks if the buffer is empty
+/// Requires: me is valid and created by circular_buf_init
+/// Returns true if the buffer is empty
+bool circular_buf_empty(cbuf_handle_t me);
+
+/// Checks if the buffer is full
+/// Requires: me is valid and created by circular_buf_init
+/// Returns true if the buffer is full
+bool circular_buf_full(cbuf_handle_t me);
+
+/// Check the capacity of the buffer
+/// Requires: me is valid and created by circular_buf_init
+/// Returns the maximum capacity of the buffer
+size_t circular_buf_capacity(cbuf_handle_t me);
+
+/// Check the number of elements stored in the buffer
+/// Requires: me is valid and created by circular_buf_init
+/// Returns the current number of elements in the buffer
+size_t circular_buf_size(cbuf_handle_t me);
+
+/// Look ahead at values stored in the circular buffer without removing the data
+/// Requires:
+///		- me is valid and created by circular_buf_init
+///		- look_ahead_counter is less than or equal to the value returned by circular_buf_size()
+/// Returns 0 if successful, -1 if data is not available
+int circular_buf_peek(cbuf_handle_t me, uint8_t* data, unsigned int look_ahead_counter);
+
+// TODO: int circular_buf_get_range(circular_buf_t me, uint8_t *data, size_t len);
+// TODO: int circular_buf_put_range(circular_buf_t me, uint8_t * data, size_t len);
 
 
 #endif /* _CIR_BUF_H_ */

Core/Inc/console.h

@@ -0,0 +1,25 @@
+/**
+*********************************************************************
+*
+* @file    console.h
+* @brief
+*
+* @date    2024-04-14 19:12:40
+* @author  CT
+*
+* @details
+*
+*************************************************************************
+**/
+
+#ifndef _CONSOLE_H_
+#define _CONSOLE_H_
+
+#include "cir_buf.h"
+
+void console_init(void);
+void console_service(void);
+int console_push(uint8_t data);
+
+
+#endif  // _CONOSLE_H_

Core/Inc/version.h

@@ -0,0 +1,11 @@
+#ifndef _VERSION_H_
+#define _VERSION_H_
+
+#define MAJOR_VERSION       0
+#define MINOR_VERSION       0
+#define PATCH_VERSION       1
+
+#define VERSION_STR         "0.0.1"
+
+
+#endif  // _VERSION_H_

Core/Src/NVmem.c

@@ -0,0 +1,176 @@
+/**
+*********************************************************************
+*
+* @file    NVmem.c
+* @brief
+*
+* @date    2024-07-13 12:24:17
+* @author  CT
+*
+* @details Provides an interface for reading and writting to non-volatile memory
+*          Operates with a shadow buffer and write timeout to minimize writes to NV-memory
+*
+*************************************************************************
+**/
+
+#include <stdint.h>
+
+#include "stm32g0xx_hal.h"
+
+#include "NVmem.h"
+
+// write timeout
+static uint32_t m_last_write = 0;
+//
+static int32_t m_shadow_buf_synced = 0;
+//
+static uint8_t m_shadow_buf[NVMEM_SIZE] = {0};
+// non-volatile memory location
+uint8_t __attribute__((section (".ConfigData"))) config_data[NVMEM_SIZE] __attribute__ ((aligned (2048)));
+
+
+static int write_flash(void);
+
+int32_t NVmem_init(void)
+{
+    // copy flash to shadow buffer
+    for (uint32_t i = 0; i < NVMEM_SIZE; i++)
+    {
+        m_shadow_buf[i] = config_data[i];
+    }
+
+    return (0);
+}
+
+void NVmem_service(void)
+{
+    // if the write timeout has expried and the shadow buffer has not been synced to NVmem
+    if (((HAL_GetTick() - m_last_write) >= WRITE_TIMEOUT) && (!m_shadow_buf_synced))
+    {
+        // write shadow buffer to nvmem
+        write_flash();
+
+        // set synced flag
+        m_shadow_buf_synced = 1;
+    }
+}
+
+
+int32_t NVmem_write(uint8_t* data, uint32_t addr, uint32_t len)
+{
+    // bound check
+    if (addr + len >= NVMEM_SIZE)
+        return (-1);
+
+    // write data to shadow buf
+    uint32_t data_index = 0;
+    for (uint32_t i = addr; i < len; i++)
+    {
+        m_shadow_buf[i] = data[data_index++];
+    }
+
+    // set sync flag to out of sync
+    m_shadow_buf_synced = 0;
+
+    return (0);
+}
+
+
+int32_t NVmem_write_immediate(uint8_t* data, uint32_t addr, uint32_t len)
+{
+    int32_t ret = 0;
+
+    // bound check
+    if (addr + len >= NVMEM_SIZE)
+        return (-1);
+
+    // write data to shadow buf
+    uint32_t data_index = 0;
+    for (uint32_t i = addr; i < len; i++)
+    {
+        m_shadow_buf[i] = data[data_index++];
+    }
+
+    // write shadow buffer to nvmem
+    write_flash();
+
+    // set synced flag
+    m_shadow_buf_synced = 1;
+
+    return (ret);
+}
+
+
+int32_t NVmem_read(uint8_t* data, uint32_t addr, uint32_t len)
+{
+    // bound check
+    if (addr + len >= NVMEM_SIZE)
+        return (-1);
+
+    // copy data using provided pointer
+    uint32_t index = 0;
+    for (uint32_t i = addr; i < len; i++)
+    {
+        data[index++] = m_shadow_buf[i];
+    }
+
+    return (0);
+}
+
+/* PRIVATE FUNCTIONS */
+
+// Read from flash
+
+
+// Write to flash
+int write_flash(void)
+{
+    uint32_t page_error = 0;
+    HAL_StatusTypeDef status;
+
+    HAL_FLASH_Unlock();
+
+    // Erase flash area
+    FLASH_EraseInitTypeDef erase_init_struct;
+
+    erase_init_struct.TypeErase = FLASH_TYPEERASE_PAGES;
+    erase_init_struct.Banks = FLASH_BANK_1;
+    erase_init_struct.Page = (0x801F800 - FLASH_BASE) / FLASH_PAGE_SIZE;
+    erase_init_struct.NbPages = 1;
+
+    status = HAL_FLASHEx_Erase(&erase_init_struct, &page_error);
+
+    if (HAL_OK != status)
+    {
+        HAL_FLASH_Lock();
+        return (-1);
+    }
+
+    uint64_t buf;
+
+    uint32_t len = NVMEM_SIZE;
+    uint32_t prog_addr = 0x801F800;
+    uint32_t index = 0;
+
+    while (len >= 8)
+    {
+        buf = (uint64_t)m_shadow_buf[index];
+        buf |= ((uint64_t)m_shadow_buf[index + 1] << 8);
+        buf |= ((uint64_t)m_shadow_buf[index + 2] << 16);
+        buf |= ((uint64_t)m_shadow_buf[index + 3] << 24);
+        buf |= ((uint64_t)m_shadow_buf[index + 4] << 32);
+        buf |= ((uint64_t)m_shadow_buf[index + 5] << 40);
+        buf |= ((uint64_t)m_shadow_buf[index + 6] << 48);
+        buf |= ((uint64_t)m_shadow_buf[index + 7] << 56);
+
+        status = HAL_FLASH_Program(FLASH_TYPEPROGRAM_DOUBLEWORD, prog_addr, buf);
+
+        index += 8;
+        prog_addr += 8;
+        len -= 8;
+    }
+
+    HAL_FLASH_Lock();
+
+    return ((int)status);
+}

Core/Src/cir_buf.c

@@ -13,6 +13,178 @@
 *************************************************************************
 **/
 
+#include <stdlib.h>
 #include <stdint.h>
+#include <stddef.h>
+#include <assert.h>
 
 #include "cir_buf.h"
+
+// The definition of our circular buffer structure is hidden from the user
+struct circular_buf_t
+{
+	uint8_t* buffer;
+	size_t head;
+	size_t tail;
+	size_t max; // of the buffer
+	bool full;
+};
+
+/* PRIVATE FUNCTIONS */
+static inline size_t advance_headtail_value(size_t value, size_t max)
+{
+	return (value + 1) % max;
+}
+
+static void advance_head_pointer(cbuf_handle_t me)
+{
+	assert(me);
+
+	if(circular_buf_full(me))
+	{
+		me->tail = advance_headtail_value(me->tail, me->max);
+	}
+
+	me->head = advance_headtail_value(me->head, me->max);
+	me->full = (me->head == me->tail);
+}
+
+/* API FUNCTIONS */
+
+cbuf_handle_t circular_buf_init(uint8_t* buffer, size_t size)
+{
+	assert(buffer && size);
+
+	cbuf_handle_t cbuf = malloc(sizeof(circular_buf_t));
+	assert(cbuf);
+
+	cbuf->buffer = buffer;
+	cbuf->max = size;
+	circular_buf_reset(cbuf);
+
+	assert(circular_buf_empty(cbuf));
+
+	return cbuf;
+}
+
+void circular_buf_free(cbuf_handle_t me)
+{
+	assert(me);
+	free(me);
+}
+
+void circular_buf_reset(cbuf_handle_t me)
+{
+	assert(me);
+
+	me->head = 0;
+	me->tail = 0;
+	me->full = false;
+}
+
+size_t circular_buf_size(cbuf_handle_t me)
+{
+	assert(me);
+
+	size_t size = me->max;
+
+	if(!circular_buf_full(me))
+	{
+		if(me->head >= me->tail)
+		{
+			size = (me->head - me->tail);
+		}
+		else
+		{
+			size = (me->max + me->head - me->tail);
+		}
+	}
+
+	return size;
+}
+
+size_t circular_buf_capacity(cbuf_handle_t me)
+{
+	assert(me);
+
+	return me->max;
+}
+
+void circular_buf_put(cbuf_handle_t me, uint8_t data)
+{
+	assert(me && me->buffer);
+
+	me->buffer[me->head] = data;
+
+	advance_head_pointer(me);
+}
+
+int circular_buf_try_put(cbuf_handle_t me, uint8_t data)
+{
+	int r = -1;
+
+	assert(me && me->buffer);
+
+	if(!circular_buf_full(me))
+	{
+		me->buffer[me->head] = data;
+		advance_head_pointer(me);
+		r = 0;
+	}
+
+	return r;
+}
+
+int circular_buf_get(cbuf_handle_t me, uint8_t* data)
+{
+	assert(me && data && me->buffer);
+
+	int r = -1;
+
+	if(!circular_buf_empty(me))
+	{
+		*data = me->buffer[me->tail];
+		me->tail = advance_headtail_value(me->tail, me->max);
+		me->full = false;
+		r = 0;
+	}
+
+	return r;
+}
+
+bool circular_buf_empty(cbuf_handle_t me)
+{
+	assert(me);
+
+	return (!circular_buf_full(me) && (me->head == me->tail));
+}
+
+bool circular_buf_full(cbuf_handle_t me)
+{
+	assert(me);
+
+	return me->full;
+}
+
+int circular_buf_peek(cbuf_handle_t me, uint8_t* data, unsigned int look_ahead_counter)
+{
+	int r = -1;
+	size_t pos;
+
+	assert(me && data && me->buffer);
+
+	// We can't look beyond the current buffer size
+	if(circular_buf_empty(me) || look_ahead_counter > circular_buf_size(me))
+	{
+		return r;
+	}
+
+	pos = me->tail;
+	for(unsigned int i = 0; i < look_ahead_counter; i++)
+	{
+		data[i] = me->buffer[pos];
+		pos = advance_headtail_value(pos, me->max);
+	}
+
+	return 0;
+}

Core/Src/console.c

@@ -0,0 +1,444 @@
+/**
+*********************************************************************
+*
+* @file    console.c
+* @brief
+*
+* @date    2024-04-14 19:12:40
+* @author  CT
+*
+* @details
+*
+*************************************************************************
+**/
+
+/*
+    Operational Concept:
+        Sending enter displays the current menu
+        Simple 1 char command interface
+*/
+#include <stdint.h>
+#include <stdbool.h>
+
+#include "console.h"
+#include "NVmem.h"
+#include "version.h"
+
+#include "usbd_cdc_if.h"
+
+
+#define CONSOLE_BUF_SIZE        (256u)
+
+
+typedef struct config_data
+{
+    int32_t val_1;
+    int32_t val_2;
+    int32_t val_3;
+} config_data_t;
+
+typedef union config_data_u
+{
+    config_data_t config;
+    uint8_t data[12];
+} config_data_u_t;
+
+static cbuf_handle_t m_console_input;
+static cbuf_handle_t m_console_output;
+static uint8_t m_console_input_buf[CONSOLE_BUF_SIZE] = {0};
+static uint8_t m_console_output_buf[CONSOLE_BUF_SIZE] = {0};
+static uint8_t tx_buf[CONSOLE_BUF_SIZE];
+static uint8_t m_command_buf[16] = {0};
+static uint8_t m_command_len = 0;
+static bool m_command_ready = false;
+static bool m_echo_console = false;
+
+// static int32_t submenu_value_one = 0;
+// static int32_t submenu_value_two = 0;
+// static int32_t submenu_value_three = 0;
+config_data_u_t configuration_data;
+
+enum console_menu_state{main_menu, submenu_1, submenu_2, submenu_3, save_menu, version_menu};
+enum console_menu_state console_menu = main_menu;
+
+
+static void process_incoming(void);
+static void process_outgoing(void);
+static void process_command(void);
+static int console_send(uint8_t* buf, uint32_t len);
+static void menu_state_machine(void);
+static int parse_input(int32_t* data);
+static int32_t read_line(uint8_t data);
+
+static void print_main_menu(void);
+static void print_submenu_one(void);
+static void print_submenu_two(void);
+static void print_submenu_three(void);
+static void print_saved_menu(int32_t val);
+
+
+static void set_console_reset(void);
+static void set_console_red(void);
+static void set_console_green(void);
+static void reset_console(void);
+
+
+/* PUBLIC FUNCTIONS */
+
+void console_init(void)
+{
+    m_console_input = circular_buf_init(m_console_input_buf, CONSOLE_BUF_SIZE);
+    m_console_output = circular_buf_init(m_console_output_buf, CONSOLE_BUF_SIZE);
+
+    // for this demonstratior, load example values from nvmem
+    NVmem_read(configuration_data.data, 0, 12);
+}
+
+
+void console_service(void)
+{
+    // if there is received data waiting
+    process_incoming();
+
+    // if there is data waiting to be transmitted
+    process_outgoing();
+
+    // Process command
+    process_command();
+}
+
+
+/// @brief Attempts to push one byte into the console input buffer
+/// @param data byte to be pushed to input
+/// @return 0 on success, -1 on failure
+int console_push(uint8_t data)
+{
+    int ret = 0;
+
+    ret = circular_buf_try_put(m_console_input, data);
+
+    return (ret);
+}
+
+
+/* PRIVATE FUNCTIONS */
+
+void process_incoming(void)
+{
+    if (!circular_buf_empty(m_console_input))
+    {
+        uint8_t data;
+        while (!circular_buf_empty(m_console_input))
+        {
+            circular_buf_get(m_console_input, &data);
+            m_command_ready = read_line(data);
+
+            if (m_echo_console)
+            {
+                circular_buf_try_put(m_console_output, data);
+            }
+        }
+    }
+}
+
+
+void process_outgoing(void)
+{
+    if(!circular_buf_empty(m_console_output))
+    {
+        size_t tx_len = circular_buf_size(m_console_output);
+        for (uint32_t i = 0; i < tx_len; i++)
+        {
+            circular_buf_get(m_console_output, &tx_buf[i]);
+        }
+        // Note: directly interacts with interface
+        CDC_Transmit_FS(tx_buf, tx_len);
+    }
+}
+
+
+void process_command(void)
+{
+    if(m_command_ready)
+    {
+        m_command_ready = false;
+        // for(uint32_t i = 0; i < m_command_len; i++)
+        // {
+        //     circular_buf_put(m_console_output, m_command_buf[i]);
+        // }
+        menu_state_machine();
+    }
+}
+
+
+int console_send(uint8_t* buf, uint32_t len)
+{
+    int ret = 0;
+
+    for (uint32_t i = 0; i < len; i++)
+    {
+        ret |= circular_buf_try_put(m_console_output, buf[i]);
+    }
+
+    return (ret);
+}
+
+
+/// @brief Reads in a line terminated by \\n
+/// @param data
+/// @return 1 if EOL found, 0 otherwise
+int32_t read_line(uint8_t data)
+{
+    int32_t ret = 0;
+    static uint8_t m_command_buf_index = 0;
+
+    // if EOL, return on and set length
+    if((data == '\n') || (data == '\r'))
+    {
+        m_command_buf[m_command_buf_index++] = '\n';
+        // set length of command for use within rest of module
+        m_command_len = m_command_buf_index;
+        // reset index
+        m_command_buf_index = 0;
+
+        ret = 1;
+    }
+    else if (data == 0x1B)  // ESCAPE
+    {
+        m_command_len = 1;
+        m_command_buf[0] = 0x1B;
+        // reset index
+        m_command_buf_index = 0;
+        ret = 1;
+    }
+    else
+    {
+        if (m_command_buf_index < 16)
+        {
+            m_command_buf[m_command_buf_index++] = data;
+        }
+        else
+        {
+            m_command_buf_index = 0;
+        }
+    }
+
+    return (ret);
+}
+
+
+// Called when a complete line has been received
+void menu_state_machine(void)
+{
+    int32_t success = 0;
+
+    switch (console_menu)
+    {
+    case main_menu:
+        if (m_command_buf[0] == '1')
+        {
+            print_submenu_one();
+            console_menu = submenu_1;
+        }
+        else if (m_command_buf[0] == '2')
+        {
+            print_submenu_two();
+            console_menu = submenu_2;
+        }
+        else if (m_command_buf[0] == '3')
+        {
+            print_submenu_three();
+            console_menu = submenu_3;
+        }
+        else if (m_command_buf[0] == 'S')
+        {
+            success = NVmem_write_immediate(configuration_data.data, 0, 12);
+            print_saved_menu(success);
+            // need to call service because we are blocking all normal execution here
+            process_outgoing();
+
+            // Delay for user to read result
+            HAL_Delay(3000);
+
+            console_menu = main_menu;
+            print_main_menu();
+        }
+        else//  if (m_command_buf[0] == '\n')
+        {
+            print_main_menu();
+        }
+        break;
+    case submenu_1:
+        if (m_command_buf[0] == 0x1B)   // ESCAPE
+        {
+            console_menu = main_menu;
+            print_main_menu();
+        }
+        else
+        {
+            // Take input and immediately return to main menu
+            parse_input(&configuration_data.config.val_1);
+            console_menu = main_menu;
+            print_main_menu();
+        }
+        break;
+
+    case submenu_2:
+        if (m_command_buf[0] == 0x1B)   // ESCAPE
+        {
+            console_menu = main_menu;
+            print_main_menu();
+        }
+        else
+        {
+            parse_input(&configuration_data.config.val_2);
+            console_menu = main_menu;
+            print_main_menu();
+        }
+        break;
+
+    case submenu_3:
+        if (m_command_buf[0] == 0x1B)   // ESCAPE
+        {
+            console_menu = main_menu;
+            print_main_menu();
+        }
+        else
+        {
+            parse_input(&configuration_data.config.val_3);
+            console_menu = main_menu;
+            print_main_menu();
+        }
+        break;
+
+    case save_menu:
+
+        break;
+
+    default:
+        break;
+    }
+}
+
+
+/// @brief Parses line for integer
+/// @param data parsed out integer
+/// @return 1 on success, otherwise fail...kinda
+int parse_input(int32_t* data)
+{
+    // *data = atoi((char*)m_command_buf);
+    int ret = sscanf((char*)m_command_buf, "%ld", data);
+
+    return (ret);
+}
+
+// Also acts as initialization for state
+void print_main_menu(void)
+{
+    char buf[128];
+
+    m_echo_console = true;
+
+    reset_console();
+    set_console_red();
+
+    uint32_t len = snprintf(buf, 128, "Main Menu:\r\n[1]Option 1: \"%li\"\r\n[2]Option 2: \"%li\"\r\n[3]Option 3: \"%li\"\r\n[S]ave\r\nVersion: %s\r\nEnter Selection: ",
+    configuration_data.config.val_1, configuration_data.config.val_2, configuration_data.config.val_3, VERSION_STR);
+    console_send((uint8_t*)buf, len);
+}
+
+void print_submenu_one(void)
+{
+    char buf[128];
+
+    m_echo_console = true;
+
+    reset_console();
+    set_console_reset();
+
+    uint32_t len = snprintf(buf, 128, "Submenu 1:\r\n");
+    console_send((uint8_t*)buf, len);
+}
+
+
+void print_submenu_two(void)
+{
+    char buf[128];
+
+    m_echo_console = true;
+
+    reset_console();
+    set_console_reset();
+
+    uint32_t len = snprintf(buf, 128, "Submenu 2:\r\n");
+    console_send((uint8_t*)buf, len);
+}
+
+
+void print_submenu_three(void)
+{
+    char buf[128];
+
+    m_echo_console = true;
+
+    reset_console();
+    set_console_reset();
+
+    uint32_t len = snprintf(buf, 128, "Submenu 3:\r\n");
+    console_send((uint8_t*)buf, len);
+}
+
+
+void print_saved_menu(int32_t val)
+{
+    char buf[128];
+    uint32_t len;
+
+    reset_console();
+    set_console_green();
+
+    if (0 == val)
+    {
+         len = snprintf(buf, 128, "SAVED!!1!");
+    }
+    else
+    {
+        len = snprintf(buf, 128, "SAVE FAILED!");
+    }
+
+    console_send((uint8_t*)buf, len);
+}
+
+
+
+void set_console_reset(void)
+{
+    char buf[16] = {0};
+    uint32_t len = snprintf(buf, 16, "\x1b[1;0m");
+    console_send((uint8_t*)buf, len);
+}
+
+
+void set_console_red(void)
+{
+    char buf[16] = {0};
+    uint32_t len = snprintf(buf, 16, "\x1b[1;31m");
+    console_send((uint8_t*)buf, len);
+}
+
+
+void set_console_green(void)
+{
+    char buf[16] = {0};
+    uint32_t len = snprintf(buf, 16, "\x1b[1;32m");
+    console_send((uint8_t*)buf, len);
+}
+
+
+void reset_console(void)
+{
+    char buf[16] = {0};
+
+    uint32_t len = snprintf(buf, 16, "\x1b[2J\x1b[H");
+    console_send((uint8_t*)buf, len);
+}

Core/Src/main.c

@@ -30,9 +30,11 @@
 
 /* Private includes ----------------------------------------------------------*/
 /* USER CODE BEGIN Includes */
+#include "console.h"
 #include "usbd_cdc_if.h"
 #include "sht_40.h"
 #include "IS66.h"
+#include "NVmem.h"
 /* USER CODE END Includes */
 
 /* Private typedef -----------------------------------------------------------*/
@@ -53,7 +55,7 @@
 /* Private variables ---------------------------------------------------------*/
 
 /* USER CODE BEGIN PV */
-char buf[256] = {0};
+
 /* USER CODE END PV */
 
 /* Private function prototypes -----------------------------------------------*/
@@ -116,6 +118,12 @@ int main(void)
     // Turn on SD Card power, active low
     HAL_GPIO_WritePin(SD_PWR_EN_GPIO_Port, SD_PWR_EN_Pin, GPIO_PIN_RESET);
 
+    NVmem_init();
+    // uint8_t buf[4] = {0xEF, 0xBE, 0xAD, 0xDE};
+    // NVmem_write(buf, 0, 4);
+
+    console_init();
+
     static uint32_t prev_tick = 0;
 
     if (HAL_OK == sht40_init(&hi2c1))
@@ -137,12 +145,22 @@ int main(void)
             prev_tick = tick;
             HAL_GPIO_TogglePin(LED_GPIO_Port, LED_Pin);
 
-            sht40_read();
+            // sht40_read();
-            temp = sht40_get_temp_C();
+            // temp = sht40_get_temp_C();
-            rh = sht40_get_rh();
+            // float temp_f = sht40_get_temp_F();
-            len = snprintf(buf, 128, "Temp: %03.2fC\tRH: %02.1f\r\n", temp, rh);
+            // rh = sht40_get_rh();
-            CDC_Transmit_FS((uint8_t *)buf, len);
+            // len = snprintf(buf, 128, "Temp: %03.2fC\t %03.2fF\r\n", temp, temp_f);
+            // len += snprintf((buf + len), (128 - len), "RH: %02.1f\r\n", rh);
+            // // CDC_Transmit_FS((uint8_t *)buf, len);
+            // for (uint32_t i = 0; i < len; i++)
+            // {
+            //     console_push(buf[i]);
+            // }
         }
+
+        NVmem_service();
+        console_service();
+
         /* USER CODE END WHILE */
 
         /* USER CODE BEGIN 3 */

STM32G0B1KBUX_FLASH.ld

@@ -62,12 +62,19 @@ _Min_Stack_Size = 0x400; /* required amount of stack */
 MEMORY
 {
 RAM (xrw)      : ORIGIN = 0x20000000, LENGTH = 144K
-FLASH (rx)      : ORIGIN = 0x8000000, LENGTH = 128K
+FLASH (rx)      : ORIGIN = 0x8000000, LENGTH = 126K
+CONFIG (r)      : ORIGIN = 0x801F800, LENGTH = 2K
 }
 
 /* Define output sections */
 SECTIONS
 {
+  /* Application NV configuration data */
+  .ConfigData (NOLOAD) :
+  {
+    KEEP(*(.ConfigData))
+  } >CONFIG
+
   /* The startup code goes first into FLASH */
   .isr_vector :
   {

USB_Device/App/usbd_cdc_if.c

@@ -22,7 +22,7 @@
 #include "usbd_cdc_if.h"
 
 /* USER CODE BEGIN INCLUDE */
-
+#include "console.h"
 /* USER CODE END INCLUDE */
 
 /* Private typedef -----------------------------------------------------------*/
@@ -263,8 +263,11 @@ static int8_t CDC_Receive_FS(uint8_t* Buf, uint32_t *Len)
   /* USER CODE BEGIN 6 */
   USBD_CDC_SetRxBuffer(&hUsbDeviceFS, &Buf[0]);
   USBD_CDC_ReceivePacket(&hUsbDeviceFS);
-  // TODO add USB received handler here
 
+  for (uint32_t i = 0; i < *Len; i++)
+  {
+    console_push(Buf[i]);
+  }
   return (USBD_OK);
   /* USER CODE END 6 */
 }

cmake/stm32cubemx/CMakeLists.txt

@@ -88,9 +88,11 @@ target_sources(stm32cubemx INTERFACE
     ../../Core/Src/sysmem.c
     ../../Core/Src/syscalls.c
     ../../startup_stm32g0b1xx.s
+    ../../Core/Src/console.c
     ../../Core/Src/cir_buf.c
     ../../Core/Src/data_table.c
     ../../Core/Src/IS66.c
+    ../../Core/Src/NVmem.c
     ../../Core/Src/sht_40.c
     ../../Core/Src/testmode.c
 )