Библа для отрисовки всякого на диод

есть 2 экзампла для i2c oled 128x32
- плеер с иконками
- вывод графиками синус и ЭКГ (не встроена пока в gfx библиотеку)

Core/OLED_Driver/oled.c

@@ -0,0 +1,85 @@
+/*
+ * oled.c
+ *
+ *  Created on: Nov 17, 2021
+ *      Author: wvv
+ */
+#include "oled.h"
+#include <string.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <main.h>
+extern I2C_HandleTypeDef hi2c1;
+
+void oled_write_cmd(uint8_t cmd)
+{
+	HAL_I2C_Mem_Write(&hi2c1, 0x78, 0x00, I2C_MEMADD_SIZE_8BIT, &cmd, 1, 0x100);
+}
+
+uint8_t oled_buf[OLED_HEIGHT * OLED_WIDTH] = { 0 };
+
+void oled_clear(void)
+{
+	memset(oled_buf, 0x00, sizeof(oled_buf));
+}
+void oled_refresh(void)
+{
+	for (uint8_t i = 0; i < OLED_HEIGHT; i++)
+	{
+		oled_write_cmd(0xb0 + i);
+		oled_write_cmd(0x00);
+		oled_write_cmd(0x10);
+		HAL_StatusTypeDef ret = HAL_I2C_Mem_Write(&hi2c1, 0x78, 0x40, 1,
+				(uint8_t*) &oled_buf[i * OLED_WIDTH], OLED_WIDTH, 100);
+		if (ret != HAL_OK)
+		{
+			HAL_I2C_DeInit(&hi2c1);
+			HAL_I2C_Init(&hi2c1);
+		}
+	}
+}
+void oled_init(void)
+{
+	oled_write_cmd(0xAE);
+	oled_write_cmd(0x20);
+	oled_write_cmd(0x10);
+
+	oled_write_cmd(0xB0);
+	oled_write_cmd(0xC8);
+	oled_write_cmd(0x00);
+	oled_write_cmd(0x10);
+	oled_write_cmd(0x40);
+
+	oled_write_cmd(0x81);
+	oled_write_cmd(0xff);
+
+	oled_write_cmd(0xa1);
+	oled_write_cmd(0xa6);
+
+	oled_write_cmd(0xa8);
+	oled_write_cmd(0x1f);
+
+	oled_write_cmd(0xd3);
+	oled_write_cmd(0x00);
+
+	oled_write_cmd(0xd5);
+	oled_write_cmd(0xf0);
+
+	oled_write_cmd(0xd9);
+	oled_write_cmd(0x22);
+
+	oled_write_cmd(0xda);
+	oled_write_cmd(0x02);
+
+	oled_write_cmd(0xdb);
+	oled_write_cmd(0x20);
+
+	oled_write_cmd(0x8d);
+	oled_write_cmd(0x14);
+
+	oled_write_cmd(0xaf);
+	HAL_Delay(100);
+	oled_clear();
+	oled_refresh();
+}
+

Core/OLED_Driver/oled.h

@@ -0,0 +1,20 @@
+/*
+ * oled.h
+ *
+ *  Created on: Nov 17, 2021
+ *      Author: wvv
+ */
+#ifndef OLED_H
+#define OLED_H
+
+#include "stm32f1xx_hal.h"
+
+#define OLED_WIDTH 128
+#define OLED_HEIGHT 4
+#define PIXEL_MODE_PAINT 	0
+#define PIXEL_MODE_CLEAR	1
+extern uint8_t oled_buf[OLED_HEIGHT * OLED_WIDTH];
+
+void oled_refresh(void);
+void oled_init(void);
+#endif //OLED_H

Core/OLED_Driver/syscalls.c

@@ -0,0 +1,125 @@
+/**
+ ******************************************************************************
+ * @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
+ *
+ * <h2><center>&copy; Copyright (c) 2020 STMicroelectronics.
+ * All rights reserved.</center></h2>
+ *
+ * This software component is licensed by ST under BSD 3-Clause license,
+ * the "License"; You may not use this file except in compliance with the
+ * License. You may obtain a copy of the License at:
+ *                        opensource.org/licenses/BSD-3-Clause
+ *
+ ******************************************************************************
+ */
+
+/* Includes */
+#include <stdlib.h>
+#include <errno.h>
+#include <stdio.h>
+#include <signal.h>
+#include <time.h>
+#include <time.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)
+{
+	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)
+{
+	int DataIdx;
+
+	for (DataIdx = 0; DataIdx < len; DataIdx++)
+	{
+		*ptr++ = __io_getchar();
+	}
+
+return len;
+}
+
+__attribute__((weak)) int _write(int file, char *ptr, int len)
+{
+	int DataIdx;
+
+	for (DataIdx = 0; DataIdx < len; DataIdx++)
+	{
+		__io_putchar(*ptr++);
+	}
+	return len;
+}
+
+int _close(int file)
+{
+	return -1;
+}
+
+
+int _isatty(int file)
+{
+	return 1;
+}
+
+int _lseek(int file, int ptr, int dir)
+{
+	return 0;
+}
+
+int _open(char *path, int flags, ...)
+{
+	/* Pretend like we always fail */
+	return -1;
+}
+
+int _wait(int *status)
+{
+	errno = 0;
+	return -1;
+}
+
+int _unlink(char *name)
+{
+	errno = 0;
+	return -1;
+}
+
+int _execve(char *name, char **argv, char **env)
+{
+	errno = ENOMEM;
+	return -1;
+}