Arrive/HW-DEPT-SIGN-STM32
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David Rice
2026-04-08 16:08:35 +01:00
commit 073ad7e2eb
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/* USER CODE BEGIN Header */
/**
******************************************************************************
* @file : main.c
* @brief : Main program body
******************************************************************************
* @attention
*
* Copyright (c) 2026 STMicroelectronics.
* All rights reserved.
*
* This software is licensed under terms that can be found in the LICENSE file
* in the root directory of this software component.
* If no LICENSE file comes with this software, it is provided AS-IS.
*
******************************************************************************
*/
/* USER CODE END Header */
/* Includes ------------------------------------------------------------------*/
#include "main.h"
/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */
#include <string.h>
#include <stdint.h>
/* USER CODE END Includes */
/* Private typedef -----------------------------------------------------------*/
/* USER CODE BEGIN PTD */
/* USER CODE END PTD */
/* Private define ------------------------------------------------------------*/
/* USER CODE BEGIN PD */
#define ROWS 7
#define COLS 96
#define NUM_CHIPS 12 /* 12 x 8 bits = 96 column bits */
#define ROW_DWELL 500 /* microseconds per row — tune for flicker/ghosting */
#define UART_BUF 128
#define WIDE_COLS 512 /* pre-render buffer width */
/* USER CODE END PD */
/* Private macro -------------------------------------------------------------*/
/* USER CODE BEGIN PM */
/* USER CODE END PM */
/* Private variables ---------------------------------------------------------*/
SPI_HandleTypeDef hspi1;
UART_HandleTypeDef huart2;
/* USER CODE BEGIN PV */
/* Row pin lookup — matches CubeMX GPIO labels */
typedef struct { GPIO_TypeDef *port; uint16_t pin; } RowPin;
static const RowPin ROW_PINS[ROWS] = {
{ROW_0_GPIO_Port, ROW_0_Pin}, /* ROW_0 — PB0 */
{ROW_1_GPIO_Port, ROW_1_Pin}, /* ROW_1 — PA0 */
{ROW_2_GPIO_Port, ROW_2_Pin}, /* ROW_2 — PA1 */
{ROW_3_GPIO_Port, ROW_3_Pin}, /* ROW_3 — PB4 */
{ROW_4_GPIO_Port, ROW_4_Pin}, /* ROW_4 — PB5 */
{ROW_5_GPIO_Port, ROW_5_Pin}, /* ROW_5 — PA11 */
{ROW_6_GPIO_Port, ROW_6_Pin}, /* ROW_6 — PA8 */
};
/* Framebuffer — fb[row][chip], each byte = 8 column bits */
static uint8_t fb[ROWS][NUM_CHIPS];
/* Pre-rendered wide scroll buffer */
static uint8_t wide[ROWS][WIDE_COLS];
static uint16_t wide_cols = 0; /* 0 = no message yet, display stays blank */
static int32_t scroll_x = 0;
/* UART receive */
static uint8_t uart_rx_byte;
static char uart_buf[UART_BUF];
static uint8_t uart_idx = 0;
static uint8_t new_message = 0;
static char message[UART_BUF] = "";
/* USER CODE END PV */
/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_SPI1_Init(void);
static void MX_USART2_UART_Init(void);
/* USER CODE BEGIN PFP */
/* USER CODE END PFP */
/* Private user code ---------------------------------------------------------*/
/* USER CODE BEGIN 0 */
/* 5x7 font, ASCII 32-90
Each glyph = 5 bytes (columns), bit0 = top row */
static const uint8_t FONT[][5] = {
{0x00,0x00,0x00,0x00,0x00}, /* ' ' 32 */
{0x00,0x00,0x5F,0x00,0x00}, /* '!' */
{0x00,0x07,0x00,0x07,0x00}, /* '"' */
{0x14,0x7F,0x14,0x7F,0x14}, /* '#' */
{0x24,0x2A,0x7F,0x2A,0x12}, /* '$' */
{0x23,0x13,0x08,0x64,0x62}, /* '%' */
{0x36,0x49,0x55,0x22,0x50}, /* '&' */
{0x00,0x05,0x03,0x00,0x00}, /* ''' */
{0x00,0x1C,0x22,0x41,0x00}, /* '(' */
{0x00,0x41,0x22,0x1C,0x00}, /* ')' */
{0x08,0x2A,0x1C,0x2A,0x08}, /* '*' */
{0x08,0x08,0x3E,0x08,0x08}, /* '+' */
{0x00,0x50,0x30,0x00,0x00}, /* ',' */
{0x08,0x08,0x08,0x08,0x08}, /* '-' */
{0x00,0x60,0x60,0x00,0x00}, /* '.' */
{0x20,0x10,0x08,0x04,0x02}, /* '/' */
{0x3E,0x51,0x49,0x45,0x3E}, /* '0' */
{0x00,0x42,0x7F,0x40,0x00}, /* '1' */
{0x42,0x61,0x51,0x49,0x46}, /* '2' */
{0x21,0x41,0x45,0x4B,0x31}, /* '3' */
{0x18,0x14,0x12,0x7F,0x10}, /* '4' */
{0x27,0x45,0x45,0x45,0x39}, /* '5' */
{0x3C,0x4A,0x49,0x49,0x30}, /* '6' */
{0x01,0x71,0x09,0x05,0x03}, /* '7' */
{0x36,0x49,0x49,0x49,0x36}, /* '8' */
{0x06,0x49,0x49,0x29,0x1E}, /* '9' */
{0x00,0x36,0x36,0x00,0x00}, /* ':' */
{0x00,0x56,0x36,0x00,0x00}, /* ';' */
{0x00,0x08,0x14,0x22,0x41}, /* '<' */
{0x14,0x14,0x14,0x14,0x14}, /* '=' */
{0x41,0x22,0x14,0x08,0x00}, /* '>' */
{0x02,0x01,0x51,0x09,0x06}, /* '?' */
{0x32,0x49,0x79,0x41,0x3E}, /* '@' */
{0x7E,0x09,0x09,0x09,0x7E}, /* 'A' */
{0x7F,0x49,0x49,0x49,0x36}, /* 'B' */
{0x3E,0x41,0x41,0x41,0x22}, /* 'C' */
{0x7F,0x41,0x41,0x41,0x3E}, /* 'D' */
{0x7F,0x49,0x49,0x49,0x41}, /* 'E' */
{0x7F,0x09,0x09,0x09,0x01}, /* 'F' */
{0x3E,0x41,0x49,0x49,0x7A}, /* 'G' */
{0x7F,0x08,0x08,0x08,0x7F}, /* 'H' */
{0x41,0x7F,0x41,0x00,0x00}, /* 'I' */
{0x20,0x40,0x41,0x3F,0x01}, /* 'J' */
{0x7F,0x08,0x14,0x22,0x41}, /* 'K' */
{0x7F,0x40,0x40,0x40,0x40}, /* 'L' */
{0x7F,0x02,0x04,0x02,0x7F}, /* 'M' */
{0x7F,0x04,0x08,0x10,0x7F}, /* 'N' */
{0x3E,0x41,0x41,0x41,0x3E}, /* 'O' */
{0x7F,0x09,0x09,0x09,0x06}, /* 'P' */
{0x3E,0x41,0x51,0x21,0x5E}, /* 'Q' */
{0x7F,0x09,0x19,0x29,0x46}, /* 'R' */
{0x46,0x49,0x49,0x49,0x31}, /* 'S' */
{0x01,0x01,0x7F,0x01,0x01}, /* 'T' */
{0x3F,0x40,0x40,0x40,0x3F}, /* 'U' */
{0x1F,0x20,0x40,0x20,0x1F}, /* 'V' */
{0x7F,0x20,0x10,0x20,0x7F}, /* 'W' */
{0x63,0x14,0x08,0x14,0x63}, /* 'X' */
{0x03,0x04,0x78,0x04,0x03}, /* 'Y' */
{0x61,0x51,0x49,0x45,0x43}, /* 'Z' */
};
/* ── Microsecond busy-wait using DWT cycle counter ── */
static void delay_us(uint32_t us)
{
uint32_t start = DWT->CYCCNT;
uint32_t ticks = (SystemCoreClock / 1000000U) * us;
while ((DWT->CYCCNT - start) < ticks);
}
/* ── Turn all row pins off (HIGH = ULN2803A pulls gate low = MOSFET off) ── */
static void all_rows_off(void)
{
for (int i = 0; i < ROWS; i++)
HAL_GPIO_WritePin(ROW_PINS[i].port, ROW_PINS[i].pin, GPIO_PIN_SET);
}
/* ── Send one row of column data via SPI then enable that row ── */
static void display_refresh(void)
{
for (int row = 0; row < ROWS; row++) {
all_rows_off();
HAL_SPI_Transmit(&hspi1, fb[row], NUM_CHIPS, HAL_MAX_DELAY);
/* LOW = ULN2803A releases gate = MOSFET on = row enabled */
HAL_GPIO_WritePin(ROW_PINS[row].port, ROW_PINS[row].pin, GPIO_PIN_RESET);
delay_us(ROW_DWELL);
}
all_rows_off();
}
/* ── Render message string into wide[] pixel buffer ── */
static void render_message(const char *msg)
{
memset(wide, 0, sizeof(wide));
uint16_t col = COLS; /* lead with one blank screen so text scrolls in */
while (*msg && col < (WIDE_COLS - 6)) {
uint8_t c = (uint8_t)*msg++;
/* Convert lowercase to uppercase */
if (c >= 'a' && c <= 'z') c -= 32;
if (c >= 32 && c <= 90) {
const uint8_t *glyph = FONT[c - 32];
for (int g = 0; g < 5 && col < WIDE_COLS; g++, col++) {
for (int row = 0; row < ROWS; row++) {
wide[row][col] = (glyph[g] >> row) & 1;
}
}
}
col++; /* one gap column between characters */
}
wide_cols = col + COLS; /* scroll until text fully exits left edge */
scroll_x = 0;
}
/* ── Copy current scroll window from wide[] into fb[][] ── */
static void update_fb_from_scroll(void)
{
for (int row = 0; row < ROWS; row++) {
memset(fb[row], 0, NUM_CHIPS);
for (int col = 0; col < COLS; col++) {
uint16_t src = (uint16_t)(scroll_x + col);
if (src < WIDE_COLS && wide[row][src]) {
int chip = col / 8;
int bit = 7 - (col % 8);
fb[row][chip] |= (uint8_t)(1 << bit);
}
}
}
}
/* ── Arrive north star pixel map, 7 rows x 11 cols ── */
static const uint8_t STAR[7][11] = {
{0,0,0,0,1,0,0,0,0,0,0},
{0,0,0,1,1,1,0,0,0,0,0},
{1,1,0,0,1,0,0,1,1,1,1},
{1,1,1,1,1,1,1,1,1,1,1},
{1,1,0,0,1,0,0,1,1,1,1},
{0,0,0,1,1,1,0,0,0,0,0},
{0,0,0,0,1,0,0,0,0,0,0},
};
/* ARRIVE — 6 chars, each 5 cols wide + 1 col gap = 36 cols total
Rows 0-6, col order left to right: A R R I V E */
static const uint8_t ARRIVE_GLYPH[7][36] = {
/* A R R I V E */
/* r0 */ {0,1,1,1,0,0, 0,1,1,1,0,0, 0,1,1,1,0,0, 0,1,1,1,0,0, 1,0,0,0,1,0, 1,1,1,1,1,0},
/* r1 */ {1,0,0,0,1,0, 1,0,0,0,1,0, 1,0,0,0,1,0, 0,0,1,0,0,0, 1,0,0,0,1,0, 1,0,0,0,0,0},
/* r2 */ {1,0,0,0,1,0, 1,0,0,0,1,0, 1,0,0,0,1,0, 0,0,1,0,0,0, 1,0,0,0,1,0, 1,0,0,0,0,0},
/* r3 */ {1,1,1,1,1,0, 1,1,1,1,0,0, 1,1,1,1,0,0, 0,0,1,0,0,0, 0,1,0,1,0,0, 1,1,1,1,0,0},
/* r4 */ {1,0,0,0,1,0, 1,0,1,0,0,0, 1,0,1,0,0,0, 0,0,1,0,0,0, 0,1,0,1,0,0, 1,0,0,0,0,0},
/* r5 */ {1,0,0,0,1,0, 1,0,0,1,0,0, 1,0,0,1,0,0, 0,0,1,0,0,0, 0,0,1,0,0,0, 1,0,0,0,0,0},
/* r6 */ {1,0,0,0,1,0, 1,0,0,0,1,0, 1,0,0,0,1,0, 0,1,1,1,0,0, 0,0,1,0,0,0, 1,1,1,1,1,0},
};
/* ── Render logo into fb
mask_col: columns < mask_col are hidden (wipe reveals right-to-left), -1 = show all ── */
static void render_logo(int star_col, int text_col, int mask_col)
{
memset(fb, 0, sizeof(fb));
/* Draw star */
for (int row = 0; row < 7; row++) {
for (int sc = 0; sc < 11; sc++) {
int col = star_col + sc;
if (col >= 0 && col < COLS && STAR[row][sc]) {
if (mask_col < 0 || col >= mask_col) {
int chip = col / 8;
int bit = 7 - (col % 8);
fb[row][chip] |= (uint8_t)(1 << bit);
}
}
}
}
/* Draw ARRIVE text */
for (int row = 0; row < 7; row++) {
for (int tc = 0; tc < 36; tc++) {
int col = text_col + tc;
if (col >= 0 && col < COLS && ARRIVE_GLYPH[row][tc]) {
if (mask_col < 0 || col >= mask_col) {
int chip = col / 8;
int bit = 7 - (col % 8);
fb[row][chip] |= (uint8_t)(1 << bit);
}
}
}
}
}
/* ── Blank fb but keep specific rows lit (bitmask) ── */
static void render_logo_rows(int star_col, int text_col, uint8_t row_mask)
{
memset(fb, 0, sizeof(fb));
for (int row = 0; row < 7; row++) {
if (!(row_mask & (1 << row))) continue;
for (int sc = 0; sc < 11; sc++) {
int col = star_col + sc;
if (col >= 0 && col < COLS && STAR[row][sc]) {
int chip = col / 8; int bit = 7 - (col % 8);
fb[row][chip] |= (uint8_t)(1 << bit);
}
}
for (int tc = 0; tc < 30; tc++) {
int col = text_col + tc;
if (col >= 0 && col < COLS && ARRIVE_GLYPH[row][tc]) {
int chip = col / 8; int bit = 7 - (col % 8);
fb[row][chip] |= (uint8_t)(1 << bit);
}
}
}
}
/* ── Refresh for a given number of milliseconds ── */
static void refresh_for(uint32_t ms)
{
uint32_t t = HAL_GetTick();
while ((HAL_GetTick() - t) < ms) { display_refresh(); }
}
/* ── Arrive boot animation ── */
static void arrive_animation(void)
{
/* Logo layout — text LEFT, star RIGHT:
ARRIVE = 36 cols, gap = 2, star = 11 cols → total = 49 cols
centred on 96: start = (96 - 49) / 2 = 23
text_col = 23, star_col = 23 + 36 + 2 = 61 */
const int text_col = 23;
const int star_col = 61;
/* ── Phase 1: Star builds from centre outward ── */
/* Frame 1 — just centre cross */
memset(fb, 0, sizeof(fb));
for (int row = 0; row < 7; row++) {
int col = star_col + 4; /* centre column of star */
int chip = col / 8; int bit = 7 - (col % 8);
fb[row][chip] |= (uint8_t)(1 << bit);
}
/* horizontal bar centre */
for (int sc = 3; sc <= 5; sc++) {
int col = star_col + sc;
int chip = col / 8; int bit = 7 - (col % 8);
fb[3][chip] |= (uint8_t)(1 << bit);
}
refresh_for(120);
/* Frame 2 — inner star shape */
memset(fb, 0, sizeof(fb));
for (int row = 0; row < 7; row++) {
for (int sc = 3; sc <= 7; sc++) {
if (STAR[row][sc]) {
int col = star_col + sc;
int chip = col / 8; int bit = 7 - (col % 8);
fb[row][chip] |= (uint8_t)(1 << bit);
}
}
}
refresh_for(120);
/* Frame 3 — full star, text still hidden */
render_logo(star_col, text_col, star_col); /* mask hides everything left of star */
refresh_for(150);
/* ── Phase 2: Glint pulse ── */
memset(fb, 0, sizeof(fb));
refresh_for(80);
render_logo(star_col, text_col, star_col);
refresh_for(80);
memset(fb, 0, sizeof(fb));
refresh_for(60);
render_logo(star_col, text_col, star_col);
refresh_for(100);
/* ── Phase 3: Wipe right-to-left — reveal ARRIVE sweeping from star leftward ── */
for (int mask = star_col; mask >= text_col - 1; mask -= 2) {
render_logo(star_col, text_col, mask);
refresh_for(18);
}
render_logo(star_col, text_col, -1);
refresh_for(18);
/* ── Phase 4: Hold ── */
refresh_for(2000);
/* ── Phase 5: Fade out — rows extinguish top+bottom inward ── */
/* Order: 0,6 then 1,5 then 2,4 then 3 */
uint8_t row_mask = 0x7F; /* all 7 rows on */
row_mask &= ~(1 << 0); row_mask &= ~(1 << 6);
render_logo_rows(star_col, text_col, row_mask); refresh_for(80);
row_mask &= ~(1 << 1); row_mask &= ~(1 << 5);
render_logo_rows(star_col, text_col, row_mask); refresh_for(80);
row_mask &= ~(1 << 2); row_mask &= ~(1 << 4);
render_logo_rows(star_col, text_col, row_mask); refresh_for(80);
row_mask &= ~(1 << 3);
memset(fb, 0, sizeof(fb)); refresh_for(80);
/* Brief blank before scroll */
refresh_for(200);
}
void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart)
{
if (huart->Instance == USART2) {
char b = (char)uart_rx_byte;
if (b == '\n' || b == '\r') {
if (uart_idx > 0) {
uart_buf[uart_idx] = '\0';
memcpy(message, uart_buf, uart_idx + 1);
uart_idx = 0;
new_message = 1;
}
} else if (uart_idx < UART_BUF - 1) {
uart_buf[uart_idx++] = b;
}
/* Re-arm for next byte */
HAL_UART_Receive_IT(&huart2, &uart_rx_byte, 1);
}
}
/* USER CODE END 0 */
/**
* @brief The application entry point.
* @retval int
*/
int main(void)
{
/* USER CODE BEGIN 1 */
/* USER CODE END 1 */
/* MCU Configuration--------------------------------------------------------*/
HAL_Init();
/* USER CODE BEGIN Init */
/* USER CODE END Init */
SystemClock_Config();
/* USER CODE BEGIN SysInit */
/* USER CODE END SysInit */
MX_GPIO_Init();
MX_SPI1_Init();
MX_USART2_UART_Init();
/* USER CODE BEGIN 2 */
/* Enable DWT cycle counter for microsecond delays */
CoreDebug->DEMCR |= CoreDebug_DEMCR_TRCENA_Msk;
DWT->CYCCNT = 0;
DWT->CTRL |= DWT_CTRL_CYCCNTENA_Msk;
/* All rows off, blank display */
all_rows_off();
memset(fb, 0, sizeof(fb));
/* Start UART receive interrupt */
HAL_UART_Receive_IT(&huart2, &uart_rx_byte, 1);
/* Render default message */
render_message(message);
update_fb_from_scroll();
/* USER CODE END 2 */
/* USER CODE BEGIN WHILE */
/* Run boot animation */
arrive_animation();
update_fb_from_scroll();
uint32_t last_scroll = HAL_GetTick();
const uint32_t scroll_ms = 40;
while (1)
{
if (new_message) {
new_message = 0;
render_message(message);
}
if ((HAL_GetTick() - last_scroll) >= scroll_ms) {
last_scroll = HAL_GetTick();
scroll_x++;
if (scroll_x >= wide_cols) {
/* End of message — switch to next */
scroll_x = 0;
}
update_fb_from_scroll();
}
display_refresh();
/* USER CODE END WHILE */
/* USER CODE BEGIN 3 */
}
/* USER CODE END 3 */
}
/**
* @brief System Clock Configuration
* @retval None
*/
void SystemClock_Config(void)
{
RCC_OscInitTypeDef RCC_OscInitStruct = {0};
RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
HAL_PWREx_ControlVoltageScaling(PWR_REGULATOR_VOLTAGE_SCALE1_BOOST);
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;
RCC_OscInitStruct.HSIState = RCC_HSI_ON;
RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI;
RCC_OscInitStruct.PLL.PLLM = RCC_PLLM_DIV4;
RCC_OscInitStruct.PLL.PLLN = 85;
RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
RCC_OscInitStruct.PLL.PLLQ = RCC_PLLQ_DIV2;
RCC_OscInitStruct.PLL.PLLR = RCC_PLLR_DIV2;
if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
{
Error_Handler();
}
RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
|RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_4) != HAL_OK)
{
Error_Handler();
}
}
/**
* @brief SPI1 Initialization Function
*/
static void MX_SPI1_Init(void)
{
/* USER CODE BEGIN SPI1_Init 0 */
/* USER CODE END SPI1_Init 0 */
/* USER CODE BEGIN SPI1_Init 1 */
/* USER CODE END SPI1_Init 1 */
hspi1.Instance = SPI1;
hspi1.Init.Mode = SPI_MODE_MASTER;
hspi1.Init.Direction = SPI_DIRECTION_2LINES;
hspi1.Init.DataSize = SPI_DATASIZE_8BIT;
hspi1.Init.CLKPolarity = SPI_POLARITY_LOW;
hspi1.Init.CLKPhase = SPI_PHASE_1EDGE;
hspi1.Init.NSS = SPI_NSS_HARD_OUTPUT;
hspi1.Init.BaudRatePrescaler = SPI_BAUDRATEPRESCALER_32;
hspi1.Init.FirstBit = SPI_FIRSTBIT_MSB;
hspi1.Init.TIMode = SPI_TIMODE_DISABLE;
hspi1.Init.CRCCalculation = SPI_CRCCALCULATION_DISABLE;
hspi1.Init.CRCPolynomial = 7;
hspi1.Init.CRCLength = SPI_CRC_LENGTH_DATASIZE;
hspi1.Init.NSSPMode = SPI_NSS_PULSE_ENABLE;
if (HAL_SPI_Init(&hspi1) != HAL_OK)
{
Error_Handler();
}
/* USER CODE BEGIN SPI1_Init 2 */
/* USER CODE END SPI1_Init 2 */
}
/**
* @brief USART2 Initialization Function
*/
static void MX_USART2_UART_Init(void)
{
/* USER CODE BEGIN USART2_Init 0 */
/* USER CODE END USART2_Init 0 */
/* USER CODE BEGIN USART2_Init 1 */
/* USER CODE END USART2_Init 1 */
huart2.Instance = USART2;
huart2.Init.BaudRate = 115200;
huart2.Init.WordLength = UART_WORDLENGTH_8B;
huart2.Init.StopBits = UART_STOPBITS_1;
huart2.Init.Parity = UART_PARITY_NONE;
huart2.Init.Mode = UART_MODE_TX_RX;
huart2.Init.HwFlowCtl = UART_HWCONTROL_NONE;
huart2.Init.OverSampling = UART_OVERSAMPLING_16;
huart2.Init.OneBitSampling = UART_ONE_BIT_SAMPLE_DISABLE;
huart2.Init.ClockPrescaler = UART_PRESCALER_DIV1;
huart2.AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_NO_INIT;
if (HAL_UART_Init(&huart2) != HAL_OK)
{
Error_Handler();
}
if (HAL_UARTEx_SetTxFifoThreshold(&huart2, UART_TXFIFO_THRESHOLD_1_8) != HAL_OK)
{
Error_Handler();
}
if (HAL_UARTEx_SetRxFifoThreshold(&huart2, UART_RXFIFO_THRESHOLD_1_8) != HAL_OK)
{
Error_Handler();
}
if (HAL_UARTEx_DisableFifoMode(&huart2) != HAL_OK)
{
Error_Handler();
}
/* USER CODE BEGIN USART2_Init 2 */
/* USER CODE END USART2_Init 2 */
}
/**
* @brief GPIO Initialization Function
*/
static void MX_GPIO_Init(void)
{
GPIO_InitTypeDef GPIO_InitStruct = {0};
/* USER CODE BEGIN MX_GPIO_Init_1 */
/* USER CODE END MX_GPIO_Init_1 */
__HAL_RCC_GPIOA_CLK_ENABLE();
__HAL_RCC_GPIOB_CLK_ENABLE();
HAL_GPIO_WritePin(GPIOA, ROW_1_Pin|ROW_2_Pin|ROW_6_Pin|ROW_5_Pin, GPIO_PIN_SET);
HAL_GPIO_WritePin(GPIOB, ROW_0_Pin|ROW_3_Pin|ROW_4_Pin|LED_Pin, GPIO_PIN_SET);
GPIO_InitStruct.Pin = ROW_1_Pin|ROW_2_Pin|ROW_6_Pin|ROW_5_Pin;
GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
GPIO_InitStruct.Pin = ROW_0_Pin|ROW_3_Pin|ROW_4_Pin;
GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
GPIO_InitStruct.Pin = LED_Pin;
GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
HAL_GPIO_Init(LED_GPIO_Port, &GPIO_InitStruct);
/* USER CODE BEGIN MX_GPIO_Init_2 */
/* USER CODE END MX_GPIO_Init_2 */
}
/* USER CODE BEGIN 4 */
/* USER CODE END 4 */
/**
* @brief This function is executed in case of error occurrence.
*/
void Error_Handler(void)
{
/* USER CODE BEGIN Error_Handler_Debug */
__disable_irq();
while (1)
{
}
/* USER CODE END Error_Handler_Debug */
}
#ifdef USE_FULL_ASSERT
void assert_failed(uint8_t *file, uint32_t line)
{
/* USER CODE BEGIN 6 */
/* USER CODE END 6 */
}
#endif /* USE_FULL_ASSERT */

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/* USER CODE BEGIN Header */
/**
******************************************************************************
* @file stm32g4xx_hal_msp.c
* @brief This file provides code for the MSP Initialization
* and de-Initialization codes.
******************************************************************************
* @attention
*
* Copyright (c) 2026 STMicroelectronics.
* All rights reserved.
*
* This software is licensed under terms that can be found in the LICENSE file
* in the root directory of this software component.
* If no LICENSE file comes with this software, it is provided AS-IS.
*
******************************************************************************
*/
/* USER CODE END Header */
/* Includes ------------------------------------------------------------------*/
#include "main.h"
/* USER CODE BEGIN Includes */
/* USER CODE END Includes */
/* Private typedef -----------------------------------------------------------*/
/* USER CODE BEGIN TD */
/* USER CODE END TD */
/* Private define ------------------------------------------------------------*/
/* USER CODE BEGIN Define */
/* USER CODE END Define */
/* Private macro -------------------------------------------------------------*/
/* USER CODE BEGIN Macro */
/* USER CODE END Macro */
/* Private variables ---------------------------------------------------------*/
/* USER CODE BEGIN PV */
/* USER CODE END PV */
/* Private function prototypes -----------------------------------------------*/
/* USER CODE BEGIN PFP */
/* USER CODE END PFP */
/* External functions --------------------------------------------------------*/
/* USER CODE BEGIN ExternalFunctions */
/* USER CODE END ExternalFunctions */
/* USER CODE BEGIN 0 */
/* USER CODE END 0 */
/**
* Initializes the Global MSP.
*/
void HAL_MspInit(void)
{
/* USER CODE BEGIN MspInit 0 */
/* USER CODE END MspInit 0 */
__HAL_RCC_SYSCFG_CLK_ENABLE();
__HAL_RCC_PWR_CLK_ENABLE();
/* System interrupt init*/
/** Disable the internal Pull-Up in Dead Battery pins of UCPD peripheral
*/
HAL_PWREx_DisableUCPDDeadBattery();
/* USER CODE BEGIN MspInit 1 */
/* USER CODE END MspInit 1 */
}
/**
* @brief SPI MSP Initialization
* This function configures the hardware resources used in this example
* @param hspi: SPI handle pointer
* @retval None
*/
void HAL_SPI_MspInit(SPI_HandleTypeDef* hspi)
{
GPIO_InitTypeDef GPIO_InitStruct = {0};
if(hspi->Instance==SPI1)
{
/* USER CODE BEGIN SPI1_MspInit 0 */
/* USER CODE END SPI1_MspInit 0 */
/* Peripheral clock enable */
__HAL_RCC_SPI1_CLK_ENABLE();
__HAL_RCC_GPIOA_CLK_ENABLE();
/**SPI1 GPIO Configuration
PA4 ------> SPI1_NSS
PA5 ------> SPI1_SCK
PA7 ------> SPI1_MOSI
*/
GPIO_InitStruct.Pin = GPIO_PIN_4|GPIO_PIN_5|GPIO_PIN_7;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
GPIO_InitStruct.Alternate = GPIO_AF5_SPI1;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
/* USER CODE BEGIN SPI1_MspInit 1 */
/* USER CODE END SPI1_MspInit 1 */
}
}
/**
* @brief SPI MSP De-Initialization
* This function freeze the hardware resources used in this example
* @param hspi: SPI handle pointer
* @retval None
*/
void HAL_SPI_MspDeInit(SPI_HandleTypeDef* hspi)
{
if(hspi->Instance==SPI1)
{
/* USER CODE BEGIN SPI1_MspDeInit 0 */
/* USER CODE END SPI1_MspDeInit 0 */
/* Peripheral clock disable */
__HAL_RCC_SPI1_CLK_DISABLE();
/**SPI1 GPIO Configuration
PA4 ------> SPI1_NSS
PA5 ------> SPI1_SCK
PA7 ------> SPI1_MOSI
*/
HAL_GPIO_DeInit(GPIOA, GPIO_PIN_4|GPIO_PIN_5|GPIO_PIN_7);
/* USER CODE BEGIN SPI1_MspDeInit 1 */
/* USER CODE END SPI1_MspDeInit 1 */
}
}
/**
* @brief UART MSP Initialization
* This function configures the hardware resources used in this example
* @param huart: UART handle pointer
* @retval None
*/
void HAL_UART_MspInit(UART_HandleTypeDef* huart)
{
GPIO_InitTypeDef GPIO_InitStruct = {0};
RCC_PeriphCLKInitTypeDef PeriphClkInit = {0};
if(huart->Instance==USART2)
{
/* USER CODE BEGIN USART2_MspInit 0 */
/* USER CODE END USART2_MspInit 0 */
/** Initializes the peripherals clocks
*/
PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_USART2;
PeriphClkInit.Usart2ClockSelection = RCC_USART2CLKSOURCE_PCLK1;
if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInit) != HAL_OK)
{
Error_Handler();
}
/* Peripheral clock enable */
__HAL_RCC_USART2_CLK_ENABLE();
__HAL_RCC_GPIOA_CLK_ENABLE();
/**USART2 GPIO Configuration
PA2 ------> USART2_TX
PA3 ------> USART2_RX
*/
GPIO_InitStruct.Pin = USART2_TX_Pin|USART2_RX_Pin;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
GPIO_InitStruct.Alternate = GPIO_AF7_USART2;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
/* USART2 interrupt Init */
HAL_NVIC_SetPriority(USART2_IRQn, 0, 0);
HAL_NVIC_EnableIRQ(USART2_IRQn);
/* USER CODE BEGIN USART2_MspInit 1 */
/* USER CODE END USART2_MspInit 1 */
}
}
/**
* @brief UART MSP De-Initialization
* This function freeze the hardware resources used in this example
* @param huart: UART handle pointer
* @retval None
*/
void HAL_UART_MspDeInit(UART_HandleTypeDef* huart)
{
if(huart->Instance==USART2)
{
/* USER CODE BEGIN USART2_MspDeInit 0 */
/* USER CODE END USART2_MspDeInit 0 */
/* Peripheral clock disable */
__HAL_RCC_USART2_CLK_DISABLE();
/**USART2 GPIO Configuration
PA2 ------> USART2_TX
PA3 ------> USART2_RX
*/
HAL_GPIO_DeInit(GPIOA, USART2_TX_Pin|USART2_RX_Pin);
/* USART2 interrupt DeInit */
HAL_NVIC_DisableIRQ(USART2_IRQn);
/* USER CODE BEGIN USART2_MspDeInit 1 */
/* USER CODE END USART2_MspDeInit 1 */
}
}
/* USER CODE BEGIN 1 */
/* USER CODE END 1 */

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/* USER CODE BEGIN Header */
/**
******************************************************************************
* @file stm32g4xx_it.c
* @brief Interrupt Service Routines.
******************************************************************************
* @attention
*
* Copyright (c) 2026 STMicroelectronics.
* All rights reserved.
*
* This software is licensed under terms that can be found in the LICENSE file
* in the root directory of this software component.
* If no LICENSE file comes with this software, it is provided AS-IS.
*
******************************************************************************
*/
/* USER CODE END Header */
/* Includes ------------------------------------------------------------------*/
#include "main.h"
#include "stm32g4xx_it.h"
/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */
/* USER CODE END Includes */
/* Private typedef -----------------------------------------------------------*/
/* USER CODE BEGIN TD */
/* USER CODE END TD */
/* Private define ------------------------------------------------------------*/
/* USER CODE BEGIN PD */
/* USER CODE END PD */
/* Private macro -------------------------------------------------------------*/
/* USER CODE BEGIN PM */
/* USER CODE END PM */
/* Private variables ---------------------------------------------------------*/
/* USER CODE BEGIN PV */
/* USER CODE END PV */
/* Private function prototypes -----------------------------------------------*/
/* USER CODE BEGIN PFP */
/* USER CODE END PFP */
/* Private user code ---------------------------------------------------------*/
/* USER CODE BEGIN 0 */
/* USER CODE END 0 */
/* External variables --------------------------------------------------------*/
extern UART_HandleTypeDef huart2;
/* USER CODE BEGIN EV */
/* USER CODE END EV */
/******************************************************************************/
/* Cortex-M4 Processor Interruption and Exception Handlers */
/******************************************************************************/
/**
* @brief This function handles Non maskable interrupt.
*/
void NMI_Handler(void)
{
/* USER CODE BEGIN NonMaskableInt_IRQn 0 */
/* USER CODE END NonMaskableInt_IRQn 0 */
/* USER CODE BEGIN NonMaskableInt_IRQn 1 */
while (1)
{
}
/* USER CODE END NonMaskableInt_IRQn 1 */
}
/**
* @brief This function handles Hard fault interrupt.
*/
void HardFault_Handler(void)
{
/* USER CODE BEGIN HardFault_IRQn 0 */
/* USER CODE END HardFault_IRQn 0 */
while (1)
{
/* USER CODE BEGIN W1_HardFault_IRQn 0 */
/* USER CODE END W1_HardFault_IRQn 0 */
}
}
/**
* @brief This function handles Memory management fault.
*/
void MemManage_Handler(void)
{
/* USER CODE BEGIN MemoryManagement_IRQn 0 */
/* USER CODE END MemoryManagement_IRQn 0 */
while (1)
{
/* USER CODE BEGIN W1_MemoryManagement_IRQn 0 */
/* USER CODE END W1_MemoryManagement_IRQn 0 */
}
}
/**
* @brief This function handles Prefetch fault, memory access fault.
*/
void BusFault_Handler(void)
{
/* USER CODE BEGIN BusFault_IRQn 0 */
/* USER CODE END BusFault_IRQn 0 */
while (1)
{
/* USER CODE BEGIN W1_BusFault_IRQn 0 */
/* USER CODE END W1_BusFault_IRQn 0 */
}
}
/**
* @brief This function handles Undefined instruction or illegal state.
*/
void UsageFault_Handler(void)
{
/* USER CODE BEGIN UsageFault_IRQn 0 */
/* USER CODE END UsageFault_IRQn 0 */
while (1)
{
/* USER CODE BEGIN W1_UsageFault_IRQn 0 */
/* USER CODE END W1_UsageFault_IRQn 0 */
}
}
/**
* @brief This function handles System service call via SWI instruction.
*/
void SVC_Handler(void)
{
/* USER CODE BEGIN SVCall_IRQn 0 */
/* USER CODE END SVCall_IRQn 0 */
/* USER CODE BEGIN SVCall_IRQn 1 */
/* USER CODE END SVCall_IRQn 1 */
}
/**
* @brief This function handles Debug monitor.
*/
void DebugMon_Handler(void)
{
/* USER CODE BEGIN DebugMonitor_IRQn 0 */
/* USER CODE END DebugMonitor_IRQn 0 */
/* USER CODE BEGIN DebugMonitor_IRQn 1 */
/* USER CODE END DebugMonitor_IRQn 1 */
}
/**
* @brief This function handles Pendable request for system service.
*/
void PendSV_Handler(void)
{
/* USER CODE BEGIN PendSV_IRQn 0 */
/* USER CODE END PendSV_IRQn 0 */
/* USER CODE BEGIN PendSV_IRQn 1 */
/* USER CODE END PendSV_IRQn 1 */
}
/**
* @brief This function handles System tick timer.
*/
void SysTick_Handler(void)
{
/* USER CODE BEGIN SysTick_IRQn 0 */
/* USER CODE END SysTick_IRQn 0 */
HAL_IncTick();
/* USER CODE BEGIN SysTick_IRQn 1 */
/* USER CODE END SysTick_IRQn 1 */
}
/******************************************************************************/
/* STM32G4xx Peripheral Interrupt Handlers */
/* Add here the Interrupt Handlers for the used peripherals. */
/* For the available peripheral interrupt handler names, */
/* please refer to the startup file (startup_stm32g4xx.s). */
/******************************************************************************/
/**
* @brief This function handles USART2 global interrupt / USART2 wake-up interrupt through EXTI line 26.
*/
void USART2_IRQHandler(void)
{
/* USER CODE BEGIN USART2_IRQn 0 */
/* USER CODE END USART2_IRQn 0 */
HAL_UART_IRQHandler(&huart2);
/* USER CODE BEGIN USART2_IRQn 1 */
/* USER CODE END USART2_IRQn 1 */
}
/* USER CODE BEGIN 1 */
/* USER CODE END 1 */

176
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/**
******************************************************************************
* @file syscalls.c
* @author Auto-generated by STM32CubeIDE
* @brief STM32CubeIDE Minimal System calls file
*
* For more information about which c-functions
* need which of these lowlevel functions
* please consult the Newlib libc-manual
******************************************************************************
* @attention
*
* Copyright (c) 2020-2026 STMicroelectronics.
* All rights reserved.
*
* This software is licensed under terms that can be found in the LICENSE file
* in the root directory of this software component.
* If no LICENSE file comes with this software, it is provided AS-IS.
*
******************************************************************************
*/
/* Includes */
#include <sys/stat.h>
#include <stdlib.h>
#include <errno.h>
#include <stdio.h>
#include <signal.h>
#include <time.h>
#include <sys/time.h>
#include <sys/times.h>
/* Variables */
extern int __io_putchar(int ch) __attribute__((weak));
extern int __io_getchar(void) __attribute__((weak));
char *__env[1] = { 0 };
char **environ = __env;
/* Functions */
void initialise_monitor_handles()
{
}
int _getpid(void)
{
return 1;
}
int _kill(int pid, int sig)
{
(void)pid;
(void)sig;
errno = EINVAL;
return -1;
}
void _exit (int status)
{
_kill(status, -1);
while (1) {} /* Make sure we hang here */
}
__attribute__((weak)) int _read(int file, char *ptr, int len)
{
(void)file;
int DataIdx;
for (DataIdx = 0; DataIdx < len; DataIdx++)
{
*ptr++ = __io_getchar();
}
return len;
}
__attribute__((weak)) int _write(int file, char *ptr, int len)
{
(void)file;
int DataIdx;
for (DataIdx = 0; DataIdx < len; DataIdx++)
{
__io_putchar(*ptr++);
}
return len;
}
int _close(int file)
{
(void)file;
return -1;
}
int _fstat(int file, struct stat *st)
{
(void)file;
st->st_mode = S_IFCHR;
return 0;
}
int _isatty(int file)
{
(void)file;
return 1;
}
int _lseek(int file, int ptr, int dir)
{
(void)file;
(void)ptr;
(void)dir;
return 0;
}
int _open(char *path, int flags, ...)
{
(void)path;
(void)flags;
/* Pretend like we always fail */
return -1;
}
int _wait(int *status)
{
(void)status;
errno = ECHILD;
return -1;
}
int _unlink(char *name)
{
(void)name;
errno = ENOENT;
return -1;
}
int _times(struct tms *buf)
{
(void)buf;
return -1;
}
int _stat(char *file, struct stat *st)
{
(void)file;
st->st_mode = S_IFCHR;
return 0;
}
int _link(char *old, char *new)
{
(void)old;
(void)new;
errno = EMLINK;
return -1;
}
int _fork(void)
{
errno = EAGAIN;
return -1;
}
int _execve(char *name, char **argv, char **env)
{
(void)name;
(void)argv;
(void)env;
errno = ENOMEM;
return -1;
}

79
Core/Src/sysmem.c Normal file
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/**
******************************************************************************
* @file sysmem.c
* @author Generated by STM32CubeIDE
* @brief STM32CubeIDE System Memory calls file
*
* For more information about which C functions
* need which of these lowlevel functions
* please consult the newlib libc manual
******************************************************************************
* @attention
*
* Copyright (c) 2026 STMicroelectronics.
* All rights reserved.
*
* This software is licensed under terms that can be found in the LICENSE file
* in the root directory of this software component.
* If no LICENSE file comes with this software, it is provided AS-IS.
*
******************************************************************************
*/
/* Includes */
#include <errno.h>
#include <stdint.h>
/**
* Pointer to the current high watermark of the heap usage
*/
static uint8_t *__sbrk_heap_end = NULL;
/**
* @brief _sbrk() allocates memory to the newlib heap and is used by malloc
* and others from the C library
*
* @verbatim
* ############################################################################
* # .data # .bss # newlib heap # MSP stack #
* # # # # Reserved by _Min_Stack_Size #
* ############################################################################
* ^-- RAM start ^-- _end _estack, RAM end --^
* @endverbatim
*
* This implementation starts allocating at the '_end' linker symbol
* The '_Min_Stack_Size' linker symbol reserves a memory for the MSP stack
* The implementation considers '_estack' linker symbol to be RAM end
* NOTE: If the MSP stack, at any point during execution, grows larger than the
* reserved size, please increase the '_Min_Stack_Size'.
*
* @param incr Memory size
* @return Pointer to allocated memory
*/
void *_sbrk(ptrdiff_t incr)
{
extern uint8_t _end; /* Symbol defined in the linker script */
extern uint8_t _estack; /* Symbol defined in the linker script */
extern uint32_t _Min_Stack_Size; /* Symbol defined in the linker script */
const uint32_t stack_limit = (uint32_t)&_estack - (uint32_t)&_Min_Stack_Size;
const uint8_t *max_heap = (uint8_t *)stack_limit;
uint8_t *prev_heap_end;
/* Initialize heap end at first call */
if (NULL == __sbrk_heap_end)
{
__sbrk_heap_end = &_end;
}
/* Protect heap from growing into the reserved MSP stack */
if (__sbrk_heap_end + incr > max_heap)
{
errno = ENOMEM;
return (void *)-1;
}
prev_heap_end = __sbrk_heap_end;
__sbrk_heap_end += incr;
return (void *)prev_heap_end;
}

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/**
******************************************************************************
* @file system_stm32g4xx.c
* @author MCD Application Team
* @brief CMSIS Cortex-M4 Device Peripheral Access Layer System Source File
*
* This file provides two functions and one global variable to be called from
* user application:
* - SystemInit(): This function is called at startup just after reset and
* before branch to main program. This call is made inside
* the "startup_stm32g4xx.s" file.
*
* - SystemCoreClock variable: Contains the core clock (HCLK), it can be used
* by the user application to setup the SysTick
* timer or configure other parameters.
*
* - SystemCoreClockUpdate(): Updates the variable SystemCoreClock and must
* be called whenever the core clock is changed
* during program execution.
*
* After each device reset the HSI (16 MHz) is used as system clock source.
* Then SystemInit() function is called, in "startup_stm32g4xx.s" file, to
* configure the system clock before to branch to main program.
*
* This file configures the system clock as follows:
*=============================================================================
*-----------------------------------------------------------------------------
* System Clock source | HSI
*-----------------------------------------------------------------------------
* SYSCLK(Hz) | 16000000
*-----------------------------------------------------------------------------
* HCLK(Hz) | 16000000
*-----------------------------------------------------------------------------
* AHB Prescaler | 1
*-----------------------------------------------------------------------------
* APB1 Prescaler | 1
*-----------------------------------------------------------------------------
* APB2 Prescaler | 1
*-----------------------------------------------------------------------------
* PLL_M | 1
*-----------------------------------------------------------------------------
* PLL_N | 16
*-----------------------------------------------------------------------------
* PLL_P | 7
*-----------------------------------------------------------------------------
* PLL_Q | 2
*-----------------------------------------------------------------------------
* PLL_R | 2
*-----------------------------------------------------------------------------
* Require 48MHz for RNG | Disabled
*-----------------------------------------------------------------------------
*=============================================================================
******************************************************************************
* @attention
*
* Copyright (c) 2019 STMicroelectronics.
* All rights reserved.
*
* This software is licensed under terms that can be found in the LICENSE file
* in the root directory of this software component.
* If no LICENSE file comes with this software, it is provided AS-IS.
*
******************************************************************************
*/
/** @addtogroup CMSIS
* @{
*/
/** @addtogroup stm32g4xx_system
* @{
*/
/** @addtogroup STM32G4xx_System_Private_Includes
* @{
*/
#include "stm32g4xx.h"
#if !defined (HSE_VALUE)
#define HSE_VALUE 24000000U /*!< Value of the External oscillator in Hz */
#endif /* HSE_VALUE */
#if !defined (HSI_VALUE)
#define HSI_VALUE 16000000U /*!< Value of the Internal oscillator in Hz*/
#endif /* HSI_VALUE */
/**
* @}
*/
/** @addtogroup STM32G4xx_System_Private_TypesDefinitions
* @{
*/
/**
* @}
*/
/** @addtogroup STM32G4xx_System_Private_Defines
* @{
*/
/************************* Miscellaneous Configuration ************************/
/* Note: Following vector table addresses must be defined in line with linker
configuration. */
/*!< Uncomment the following line if you need to relocate the vector table
anywhere in Flash or Sram, else the vector table is kept at the automatic
remap of boot address selected */
/* #define USER_VECT_TAB_ADDRESS */
#if defined(USER_VECT_TAB_ADDRESS)
/*!< Uncomment the following line if you need to relocate your vector Table
in Sram else user remap will be done in Flash. */
/* #define VECT_TAB_SRAM */
#if defined(VECT_TAB_SRAM)
#define VECT_TAB_BASE_ADDRESS SRAM_BASE /*!< Vector Table base address field.
This value must be a multiple of 0x200. */
#else
#define VECT_TAB_BASE_ADDRESS FLASH_BASE /*!< Vector Table base address field.
This value must be a multiple of 0x200. */
#endif /* VECT_TAB_SRAM */
#if !defined(VECT_TAB_OFFSET)
#define VECT_TAB_OFFSET 0x00000000U /*!< Vector Table offset field.
This value must be a multiple of 0x200. */
#endif /* VECT_TAB_OFFSET */
#endif /* USER_VECT_TAB_ADDRESS */
/******************************************************************************/
/**
* @}
*/
/** @addtogroup STM32G4xx_System_Private_Macros
* @{
*/
/**
* @}
*/
/** @addtogroup STM32G4xx_System_Private_Variables
* @{
*/
/* The SystemCoreClock variable is updated in three ways:
1) by calling CMSIS function SystemCoreClockUpdate()
2) by calling HAL API function HAL_RCC_GetHCLKFreq()
3) each time HAL_RCC_ClockConfig() is called to configure the system clock frequency
Note: If you use this function to configure the system clock; then there
is no need to call the 2 first functions listed above, since SystemCoreClock
variable is updated automatically.
*/
uint32_t SystemCoreClock = HSI_VALUE;
const uint8_t AHBPrescTable[16] = {0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 1U, 2U, 3U, 4U, 6U, 7U, 8U, 9U};
const uint8_t APBPrescTable[8] = {0U, 0U, 0U, 0U, 1U, 2U, 3U, 4U};
/**
* @}
*/
/** @addtogroup STM32G4xx_System_Private_FunctionPrototypes
* @{
*/
/**
* @}
*/
/** @addtogroup STM32G4xx_System_Private_Functions
* @{
*/
/**
* @brief Setup the microcontroller system.
* @param None
* @retval None
*/
void SystemInit(void)
{
/* FPU settings ------------------------------------------------------------*/
#if (__FPU_PRESENT == 1) && (__FPU_USED == 1)
SCB->CPACR |= ((3UL << (10*2))|(3UL << (11*2))); /* set CP10 and CP11 Full Access */
#endif
/* Configure the Vector Table location add offset address ------------------*/
#if defined(USER_VECT_TAB_ADDRESS)
SCB->VTOR = VECT_TAB_BASE_ADDRESS | VECT_TAB_OFFSET; /* Vector Table Relocation in Internal SRAM */
#endif /* USER_VECT_TAB_ADDRESS */
}
/**
* @brief Update SystemCoreClock variable according to Clock Register Values.
* The SystemCoreClock variable contains the core clock (HCLK), it can
* be used by the user application to setup the SysTick timer or configure
* other parameters.
*
* @note Each time the core clock (HCLK) changes, this function must be called
* to update SystemCoreClock variable value. Otherwise, any configuration
* based on this variable will be incorrect.
*
* @note - The system frequency computed by this function is not the real
* frequency in the chip. It is calculated based on the predefined
* constant and the selected clock source:
*
* - If SYSCLK source is HSI, SystemCoreClock will contain the HSI_VALUE(**)
*
* - If SYSCLK source is HSE, SystemCoreClock will contain the HSE_VALUE(***)
*
* - If SYSCLK source is PLL, SystemCoreClock will contain the HSE_VALUE(***)
* or HSI_VALUE(*) multiplied/divided by the PLL factors.
*
* (**) HSI_VALUE is a constant defined in stm32g4xx_hal.h file (default value
* 16 MHz) but the real value may vary depending on the variations
* in voltage and temperature.
*
* (***) HSE_VALUE is a constant defined in stm32g4xx_hal.h file (default value
* 24 MHz), user has to ensure that HSE_VALUE is same as the real
* frequency of the crystal used. Otherwise, this function may
* have wrong result.
*
* - The result of this function could be not correct when using fractional
* value for HSE crystal.
*
* @param None
* @retval None
*/
void SystemCoreClockUpdate(void)
{
uint32_t tmp, pllvco, pllr, pllsource, pllm;
/* Get SYSCLK source -------------------------------------------------------*/
switch (RCC->CFGR & RCC_CFGR_SWS)
{
case 0x04: /* HSI used as system clock source */
SystemCoreClock = HSI_VALUE;
break;
case 0x08: /* HSE used as system clock source */
SystemCoreClock = HSE_VALUE;
break;
case 0x0C: /* PLL used as system clock source */
/* PLL_VCO = (HSE_VALUE or HSI_VALUE / PLLM) * PLLN
SYSCLK = PLL_VCO / PLLR
*/
pllsource = (RCC->PLLCFGR & RCC_PLLCFGR_PLLSRC);
pllm = ((RCC->PLLCFGR & RCC_PLLCFGR_PLLM) >> 4) + 1U ;
if (pllsource == 0x02UL) /* HSI used as PLL clock source */
{
pllvco = (HSI_VALUE / pllm);
}
else /* HSE used as PLL clock source */
{
pllvco = (HSE_VALUE / pllm);
}
pllvco = pllvco * ((RCC->PLLCFGR & RCC_PLLCFGR_PLLN) >> 8);
pllr = (((RCC->PLLCFGR & RCC_PLLCFGR_PLLR) >> 25) + 1U) * 2U;
SystemCoreClock = pllvco/pllr;
break;
default:
break;
}
/* Compute HCLK clock frequency --------------------------------------------*/
/* Get HCLK prescaler */
tmp = AHBPrescTable[((RCC->CFGR & RCC_CFGR_HPRE) >> 4)];
/* HCLK clock frequency */
SystemCoreClock >>= tmp;
}
/**
* @}
*/
/**
* @}
*/
/**
* @}
*/