Changeset - 7e9d097bfe72
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Nick Orlando (NEO) - 10 years ago 2016-07-29 23:53:43
nick.orlando67@gmail.com
Added interrupts to code
6 files changed with 84 insertions and 16 deletions:
.cproject
1
1
inc/gpio.h
11
src/gpio.c
16
2
src/interrupts.c
42
src/main.c
10
9
src/ssd1306.c
4
4
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.cproject
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inc/gpio.h
➞
Show inline comments
 
#ifndef __gpio_H
 
#define __gpio_H
 
 
#include "stm32f3xx_hal.h"
 
 
 
// Define FAULT LED
 
#define LED_RED_Pin GPIO_PIN_5
 
#define LED_RED_GPIO_Port GPIOA
 
#define LED_RED LED_RED_GPIO_Port , LED_RED_Pin
 
 
// Define Fuse Closed drive
 
#define GATE_DRIVE_Pin GPIO_PIN_3
 
#define GATE_DRIVE_GPIO_Port GPIOA
 
#define GATE_DRIVE GATE_DRIVE_GPIO_Port , GATE_DRIVE_Pin
 
 
#define SW_A_Pin GPIO_PIN_6
 
#define SW_A_GPIO_Port GPIOA
 
#define SW_BTN_Pin GPIO_PIN_8
 
#define SW_BTN_GPIO_Port GPIOA
 
#define SW_C_Pin GPIO_PIN_9
 
#define SW_C_GPIO_Port GPIOA
 
#define SW_D_Pin GPIO_PIN_10
 
#define SW_D_GPIO_Port GPIOA
 
#define SW_B_Pin GPIO_PIN_15
 
#define SW_B_GPIO_Port GPIOA
 
 
 
void gpio_init(void);
 
void gpio_led_blueblink(uint8_t num_blinks);
 
 
#endif
src/gpio.c
➞
Show inline comments
 
//
 
// GPIO: configure general-purpose inputs/outputs
 
//
 
 
#include "stm32f3xx_hal.h"
 
 
#include "gpio.h"
 
 
 
// Initialize GPIOs
 
void gpio_init(void)
 
{
 
	GPIO_InitTypeDef GPIO_InitStruct;
 
 
	// GPIO Ports Clock Enable
 
	__GPIOA_CLK_ENABLE();
 
	__GPIOB_CLK_ENABLE();
 
	__GPIOF_CLK_ENABLE();
 
 
 
	// Configure LED GPIO pins
 
	GPIO_InitStruct.Pin = LED_RED_Pin;
 
	GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
 
	GPIO_InitStruct.Pull = GPIO_NOPULL;
 
	GPIO_InitStruct.Speed = GPIO_SPEED_LOW;
 
	HAL_GPIO_Init(LED_RED_GPIO_Port, &GPIO_InitStruct);
 
 
	// Configure Gate Drive GPIO pins
 
	GPIO_InitStruct.Pin = GATE_DRIVE_Pin;
 
	GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
 
	GPIO_InitStruct.Pull = GPIO_NOPULL;
 
	GPIO_InitStruct.Speed = GPIO_SPEED_HIGH;
 
	HAL_GPIO_Init(GATE_DRIVE_GPIO_Port, &GPIO_InitStruct);
 
 
 
	GPIO_InitStruct.Pin = SW_A_Pin|SW_BTN_Pin|SW_C_Pin|SW_D_Pin
 
	                          |SW_B_Pin;
 
	GPIO_InitStruct.Mode = GPIO_MODE_IT_FALLING;
 
	GPIO_InitStruct.Pull = GPIO_PULLUP;
 
	HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
 
 
	/* EXTI interrupt init*/
 
	HAL_NVIC_SetPriority(EXTI9_5_IRQn, 0, 0);
 
	HAL_NVIC_EnableIRQ(EXTI9_5_IRQn);
 
 
	HAL_NVIC_SetPriority(EXTI15_10_IRQn, 0, 0);
 
	HAL_NVIC_EnableIRQ(EXTI15_10_IRQn);
 
 
	// Define startup State
 
	HAL_GPIO_WritePin(LED_RED, 1);
 
	HAL_GPIO_WritePin(GATE_DRIVE, 1);
 
	HAL_GPIO_WritePin(LED_RED, 0);
 
	HAL_GPIO_WritePin(GATE_DRIVE, 0);
 
 
}
src/interrupts.c
➞
Show inline comments
 
//
 
// Interrupts: handlers for any needed global interrupts
 
//
 
 
#include "stm32f3xx_hal.h"
 
#include "stm32f3xx.h"
 
 
#include "interrupts.h"
 
 
#include "gpio.h"
 
 
// Systick interrupt
 
void SysTick_Handler(void)
 
{
 
  HAL_IncTick();
 
  HAL_SYSTICK_IRQHandler();
 
}
 
 
void EXTI9_5_IRQHandler(void)
 
{
 
  /* USER CODE BEGIN EXTI9_5_IRQn 0 */
 
 
  /* USER CODE END EXTI9_5_IRQn 0 */
 
  HAL_GPIO_EXTI_IRQHandler(SW_A_Pin);
 
  HAL_GPIO_EXTI_IRQHandler(SW_BTN_Pin);
 
  HAL_GPIO_EXTI_IRQHandler(SW_C_Pin);
 
  /* USER CODE BEGIN EXTI9_5_IRQn 1 */
 
 
  /* USER CODE END EXTI9_5_IRQn 1 */
 
}
 
 
void EXTI15_10_IRQHandler(void)
 
{
 
  /* USER CODE BEGIN EXTI15_10_IRQn 0 */
 
 
  /* USER CODE END EXTI15_10_IRQn 0 */
 
  HAL_GPIO_EXTI_IRQHandler(SW_D_Pin);
 
  HAL_GPIO_EXTI_IRQHandler(SW_B_Pin);
 
  /* USER CODE BEGIN EXTI15_10_IRQn 1 */
 
 
  /* USER CODE END EXTI15_10_IRQn 1 */
 
}
 
 
uint32_t last_button_press = 0;
 
 
void HAL_GPIO_EXTI_Callback(uint16_t GPIO_Pin)
 
{
 
	switch(GPIO_Pin)
 
	{
 
		case SW_BTN_Pin:
 
		{
 
			if(HAL_GetTick() > last_button_press + 100)
 
			{
 
				HAL_GPIO_TogglePin(LED_RED);
 
				last_button_press = HAL_GetTick();
 
			}
 
		} break;
 
	}
 
}
src/main.c
➞
Show inline comments
 
//
 
// STM32F103 Template Firmware
 
// Copyright 2016 SeaLandAire Technologies
 
// Author(s): Ethan Zonca
 
//
 
 
#include "stm32f3xx_hal.h"
 
#include "config.h"
 
 
#include "watchdog.h"
 
#include "system.h"
 
#include "gpio.h"
 
#include "error.h"
 
#include "flash.h"
 
#include "ssd1306.h"
 
 
int main(void)
 
{
 
	sysclock_init();
 
	hal_init();
 
	gpio_init();
 
	ssd1306_init();
 
	ssd1306_drawlogo();
 
	ssd1306_clearscreen();
 
 
	// ssd1306_drawstring(const char *dataPtr, unsigned char row, unsigned char xPos)
 
	ssd1306_drawstring("Freaking test", 0, 0);
 
 
	int32_t my_variable = -123;
 
	ssd1306_drawstring("[ ProtoFuse ]", 0, 0);
 
	ssd1306_drawstring("HW v1.0   SW v0.1", 1, 0);
 
 
	char buffer[256];
 
	snprintf(buffer, 256, "My Variable: %d", my_variable);
 
	ssd1306_drawstring(buffer, 2, 0);
 
	int32_t battery_adc_count = 0;
 
 
 
	flash_init();
 
	watchdog_init();
 
 
	// Software timers
 
	uint32_t last_blink_time = HAL_GetTick();
 
 
	while (1)
 
	{
 
		// Grab and transmit data
 
		if(HAL_GetTick() - last_blink_time > 100)
 
		if(HAL_GetTick() - last_blink_time > 1000)
 
		{
 
			HAL_GPIO_TogglePin(LED_RED);
 
			char buffer[256];
 
			snprintf(buffer, 256, "My Variable: %d", battery_adc_count);
 
			ssd1306_drawstring(buffer, 2, 0);
 
//			HAL_GPIO_TogglePin(LED_RED);
 
			battery_adc_count++;
 
			last_blink_time = HAL_GetTick();
 
		}
 
 
		// Process CAN messages and LED state
 
		watchdog_feed();
 
	}
 
}
 
 
src/ssd1306.c
➞
Show inline comments
 
#include "stm32f3xx_hal.h"
 
#include "ssd1306.h"
 
 
 
SPI_HandleTypeDef hspi1;
 
 
 
 
SPI_HandleTypeDef* spi_get()
 
{
 
    return &hspi1;
 
}
 
 
 
// Write command to OLED
 
static void WriteCommand(unsigned char command)
 
{
 
  SSD_CS_Low();
 
  SSD_A0_Low();
 
  SPI_SendByte(command);
 
  SSD_CS_High();
 
}
 
 
// Write data to OLED
 
static void WriteData(unsigned char data)
 
{
 
  SSD_CS_Low();
 
  SSD_A0_High();
 
  SPI_SendByte(data);
 
  SSD_CS_High();
 
}
 
 
// Initialize OLED
 
void ssd1306_init(void)
 
{
 
    __SPI3_CLK_ENABLE();
 
    __GPIOB_CLK_ENABLE();
 
    GPIO_InitTypeDef GPIO_InitStruct;
 
 
    /*Configure GPIO pins : OLED_CS_Pin OLED_RESET_Pin OLED_DC_Pin */
 
    GPIO_InitStruct.Pin = OLED_CS_Pin|OLED_RESET_Pin|OLED_DC_Pin;
 
    GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
 
    GPIO_InitStruct.Pull = GPIO_NOPULL;
 
    GPIO_InitStruct.Speed = GPIO_SPEED_LOW;
 
    HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
 
 
 
	// Set up GPIOs
 
    GPIO_InitStruct.Pin = GPIO_PIN_3|GPIO_PIN_5;
 
    GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
 
    GPIO_InitStruct.Pull = GPIO_NOPULL;
 
    GPIO_InitStruct.Speed = GPIO_SPEED_HIGH;
 
    GPIO_InitStruct.Alternate = GPIO_AF6_SPI3;
 
    HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
 
 
 
	// Set up SPI port for OLED
 
    hspi1.Instance = SPI3;
 
    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_SOFT;
 
    hspi1.Init.BaudRatePrescaler = SPI_BAUDRATEPRESCALER_16;
 
    hspi1.Init.FirstBit = SPI_FIRSTBIT_MSB;
 
    hspi1.Init.TIMode = SPI_TIMODE_DISABLED;
 
    hspi1.Init.CRCCalculation = SPI_CRCCALCULATION_DISABLED;
 
    hspi1.Init.NSSPMode = SPI_NSS_PULSE_ENABLED;
 
    HAL_SPI_Init(&hspi1);
 
 
 
 
  /* Generate a reset */
 
  SSD_Reset_Low();
 
  uint32_t i;
 
  for(i=5000; i>1; i--)
 
  SSD_Reset_High();
 
 
  WriteCommand(0xAE);
 
  WriteCommand(0xD5);
 
  WriteCommand(0x80);
 
  WriteCommand(0xA8);
 
  WriteCommand(0x1F);
 
  WriteCommand(0xD3);
 
  WriteCommand(0x00);
 
  WriteCommand(0x40 | 0x00); // line #0
 
  WriteCommand(0x8D);
 
  WriteCommand(0x14); //10 or 14 if not externalvcc
 
  WriteCommand(0x20);
 
  WriteCommand(0x00);
 
//  WriteCommand(0xA0 | 0x1); // segremap (normal)
 
  WriteCommand(0xA0); // segremap (flip)
 
//  WriteCommand(0xC8); // comscandec (normal)
 
  WriteCommand(0xC0); // comscandec (flip)
 
  WriteCommand(0xA0 | 0x1); // segremap (normal)
 
//  WriteCommand(0xA0); // segremap (flip)
 
  WriteCommand(0xC8); // comscandec (normal)
 
//  WriteCommand(0xC0); // comscandec (flip)
 
  WriteCommand(0xDA); // setcompins
 
  WriteCommand(0x02);
 
  WriteCommand(0x81); // contrast
 
  WriteCommand(0x0F); // contrast value. 8f is a good one.
 
  WriteCommand(0xD9);
 
  WriteCommand(0xF1); //22 or F1 if not externalvcc
 
  WriteCommand(0xDB);
 
  WriteCommand(0x40);
 
  WriteCommand(0xA4); // dispalyallon_resume
 
  WriteCommand(0xA6); // normaldisplay
 
 
 
  WriteCommand(0xAF); // display on
 
}
 
 
 
// Times New Roman font
 
static const char fontData[][5] =
 
{                                       // Refer to "Times New Roman" Font Database
 
                                        //   Basic Characters
 
    {0x00,0x00,0x00,0x00,0x00},         //   (  0)    - 0x0020 No-Break Space
 
    {0x00,0x00,0x4F,0x00,0x00},         //   (  1)  ! - 0x0021 Exclamation Mark
 
    {0x00,0x07,0x00,0x07,0x00},         //   (  2)  " - 0x0022 Quotation Mark
 
    {0x14,0x7F,0x14,0x7F,0x14},         //   (  3)  # - 0x0023 Number Sign
 
    {0x24,0x2A,0x7F,0x2A,0x12},         //   (  4)  $ - 0x0024 Dollar Sign
 
    {0x23,0x13,0x08,0x64,0x62},         //   (  5)  % - 0x0025 Percent Sign
 
    {0x36,0x49,0x55,0x22,0x50},         //   (  6)  & - 0x0026 Ampersand
 
    {0x00,0x05,0x03,0x00,0x00},         //   (  7)  ' - 0x0027 Apostrophe
 
    {0x00,0x1C,0x22,0x41,0x00},         //   (  8)  ( - 0x0028 Left Parenthesis
 
    {0x00,0x41,0x22,0x1C,0x00},         //   (  9)  ) - 0x0029 Right Parenthesis
 
    {0x14,0x08,0x3E,0x08,0x14},         //   ( 10)  * - 0x002A Asterisk
 
    {0x08,0x08,0x3E,0x08,0x08},         //   ( 11)  + - 0x002B Plus Sign
 
    {0x00,0x50,0x30,0x00,0x00},         //   ( 12)  , - 0x002C Comma
 
    {0x08,0x08,0x08,0x08,0x08},         //   ( 13)  - - 0x002D Hyphen-Minus
 
    {0x00,0x60,0x60,0x00,0x00},         //   ( 14)  . - 0x002E Full Stop
 
    {0x20,0x10,0x08,0x04,0x02},         //   ( 15)  / - 0x002F Solidus
 
    {0x3E,0x51,0x49,0x45,0x3E},         //   ( 16)  0 - 0x0030 Digit Zero
 
    {0x00,0x42,0x7F,0x40,0x00},         //   ( 17)  1 - 0x0031 Digit One
 
    {0x42,0x61,0x51,0x49,0x46},         //   ( 18)  2 - 0x0032 Digit Two
 
    {0x21,0x41,0x45,0x4B,0x31},         //   ( 19)  3 - 0x0033 Digit Three
 
    {0x18,0x14,0x12,0x7F,0x10},         //   ( 20)  4 - 0x0034 Digit Four
 
    {0x27,0x45,0x45,0x45,0x39},         //   ( 21)  5 - 0x0035 Digit Five
 
    {0x3C,0x4A,0x49,0x49,0x30},         //   ( 22)  6 - 0x0036 Digit Six
 
    {0x01,0x71,0x09,0x05,0x03},         //   ( 23)  7 - 0x0037 Digit Seven
 
    {0x36,0x49,0x49,0x49,0x36},         //   ( 24)  8 - 0x0038 Digit Eight
 
    {0x06,0x49,0x49,0x29,0x1E},         //   ( 25)  9 - 0x0039 Dight Nine
 
    {0x00,0x36,0x36,0x00,0x00},         //   ( 26)  : - 0x003A Colon
 
    {0x00,0x56,0x36,0x00,0x00},         //   ( 27)  ; - 0x003B Semicolon
 
    {0x08,0x14,0x22,0x41,0x00},         //   ( 28)  < - 0x003C Less-Than Sign
 
    {0x14,0x14,0x14,0x14,0x14},         //   ( 29)  = - 0x003D Equals Sign
 
    {0x00,0x41,0x22,0x14,0x08},         //   ( 30)  > - 0x003E Greater-Than Sign
 
    {0x02,0x01,0x51,0x09,0x06},         //   ( 31)  ? - 0x003F Question Mark
 
    {0x32,0x49,0x79,0x41,0x3E},         //   ( 32)  @ - 0x0040 Commercial At
 
    {0x7E,0x11,0x11,0x11,0x7E},         //   ( 33)  A - 0x0041 Latin Capital Letter A
 
    {0x7F,0x49,0x49,0x49,0x36},         //   ( 34)  B - 0x0042 Latin Capital Letter B
 
    {0x3E,0x41,0x41,0x41,0x22},         //   ( 35)  C - 0x0043 Latin Capital Letter C
 
    {0x7F,0x41,0x41,0x22,0x1C},         //   ( 36)  D - 0x0044 Latin Capital Letter D
 
    {0x7F,0x49,0x49,0x49,0x41},         //   ( 37)  E - 0x0045 Latin Capital Letter E
 
    {0x7F,0x09,0x09,0x09,0x01},         //   ( 38)  F - 0x0046 Latin Capital Letter F
 
    {0x3E,0x41,0x49,0x49,0x7A},         //   ( 39)  G - 0x0047 Latin Capital Letter G
 
    {0x7F,0x08,0x08,0x08,0x7F},         //   ( 40)  H - 0x0048 Latin Capital Letter H
 
    {0x00,0x41,0x7F,0x41,0x00},         //   ( 41)  I - 0x0049 Latin Capital Letter I
 
    {0x20,0x40,0x41,0x3F,0x01},         //   ( 42)  J - 0x004A Latin Capital Letter J
 
    {0x7F,0x08,0x14,0x22,0x41},         //   ( 43)  K - 0x004B Latin Capital Letter K
 
    {0x7F,0x40,0x40,0x40,0x40},         //   ( 44)  L - 0x004C Latin Capital Letter L
 
    {0x7F,0x02,0x0C,0x02,0x7F},         //   ( 45)  M - 0x004D Latin Capital Letter M
 
    {0x7F,0x04,0x08,0x10,0x7F},         //   ( 46)  N - 0x004E Latin Capital Letter N
 
    {0x3E,0x41,0x41,0x41,0x3E},         //   ( 47)  O - 0x004F Latin Capital Letter O
 
    {0x7F,0x09,0x09,0x09,0x06},         //   ( 48)  P - 0x0050 Latin Capital Letter P
 
    {0x3E,0x41,0x51,0x21,0x5E},         //   ( 49)  Q - 0x0051 Latin Capital Letter Q
 
    {0x7F,0x09,0x19,0x29,0x46},         //   ( 50)  R - 0x0052 Latin Capital Letter R
 
    {0x46,0x49,0x49,0x49,0x31},         //   ( 51)  S - 0x0053 Latin Capital Letter S
 
    {0x01,0x01,0x7F,0x01,0x01},         //   ( 52)  T - 0x0054 Latin Capital Letter T
 
    {0x3F,0x40,0x40,0x40,0x3F},         //   ( 53)  U - 0x0055 Latin Capital Letter U
 
    {0x1F,0x20,0x40,0x20,0x1F},         //   ( 54)  V - 0x0056 Latin Capital Letter V
 
    {0x3F,0x40,0x38,0x40,0x3F},         //   ( 55)  W - 0x0057 Latin Capital Letter W
 
    {0x63,0x14,0x08,0x14,0x63},         //   ( 56)  X - 0x0058 Latin Capital Letter X
 
    {0x07,0x08,0x70,0x08,0x07},         //   ( 57)  Y - 0x0059 Latin Capital Letter Y
 
    {0x61,0x51,0x49,0x45,0x43},         //   ( 58)  Z - 0x005A Latin Capital Letter Z
 
    {0x00,0x7F,0x41,0x41,0x00},         //   ( 59)  [ - 0x005B Left Square Bracket
 
    {0x02,0x04,0x08,0x10,0x20},         //   ( 60)  \ - 0x005C Reverse Solidus
 
    {0x00,0x41,0x41,0x7F,0x00},         //   ( 61)  ] - 0x005D Right Square Bracket
 
    {0x04,0x02,0x01,0x02,0x04},         //   ( 62)  ^ - 0x005E Circumflex Accent
 
    {0x40,0x40,0x40,0x40,0x40},         //   ( 63)  _ - 0x005F Low Line
 
    {0x01,0x02,0x04,0x00,0x00},         //   ( 64)  ` - 0x0060 Grave Accent
 
    {0x20,0x54,0x54,0x54,0x78},         //   ( 65)  a - 0x0061 Latin Small Letter A
 
    {0x7F,0x48,0x44,0x44,0x38},         //   ( 66)  b - 0x0062 Latin Small Letter B
 
    {0x38,0x44,0x44,0x44,0x20},         //   ( 67)  c - 0x0063 Latin Small Letter C
 
    {0x38,0x44,0x44,0x48,0x7F},         //   ( 68)  d - 0x0064 Latin Small Letter D
 
    {0x38,0x54,0x54,0x54,0x18},         //   ( 69)  e - 0x0065 Latin Small Letter E
 
    {0x08,0x7E,0x09,0x01,0x02},         //   ( 70)  f - 0x0066 Latin Small Letter F
 
    {0x06,0x49,0x49,0x49,0x3F},         //   ( 71)  g - 0x0067 Latin Small Letter G
 
    {0x7F,0x08,0x04,0x04,0x78},         //   ( 72)  h - 0x0068 Latin Small Letter H
 
    {0x00,0x44,0x7D,0x40,0x00},         //   ( 73)  i - 0x0069 Latin Small Letter I
 
    {0x20,0x40,0x44,0x3D,0x00},         //   ( 74)  j - 0x006A Latin Small Letter J
 
    {0x7F,0x10,0x28,0x44,0x00},         //   ( 75)  k - 0x006B Latin Small Letter K
 
    {0x00,0x41,0x7F,0x40,0x00},         //   ( 76)  l - 0x006C Latin Small Letter L
 
    {0x7C,0x04,0x18,0x04,0x7C},         //   ( 77)  m - 0x006D Latin Small Letter M
 
    {0x7C,0x08,0x04,0x04,0x78},         //   ( 78)  n - 0x006E Latin Small Letter N
 
    {0x38,0x44,0x44,0x44,0x38},         //   ( 79)  o - 0x006F Latin Small Letter O
 
    {0x7C,0x14,0x14,0x14,0x08},         //   ( 80)  p - 0x0070 Latin Small Letter P
 
    {0x08,0x14,0x14,0x18,0x7C},         //   ( 81)  q - 0x0071 Latin Small Letter Q
 
    {0x7C,0x08,0x04,0x04,0x08},         //   ( 82)  r - 0x0072 Latin Small Letter R
 
    {0x48,0x54,0x54,0x54,0x20},         //   ( 83)  s - 0x0073 Latin Small Letter S
 
    {0x04,0x3F,0x44,0x40,0x20},         //   ( 84)  t - 0x0074 Latin Small Letter T
 
    {0x3C,0x40,0x40,0x20,0x7C},         //   ( 85)  u - 0x0075 Latin Small Letter U
 
    {0x1C,0x20,0x40,0x20,0x1C},         //   ( 86)  v - 0x0076 Latin Small Letter V
 
    {0x3C,0x40,0x30,0x40,0x3C},         //   ( 87)  w - 0x0077 Latin Small Letter W
 
    {0x44,0x28,0x10,0x28,0x44},         //   ( 88)  x - 0x0078 Latin Small Letter X
 
    {0x0C,0x50,0x50,0x50,0x3C},         //   ( 89)  y - 0x0079 Latin Small Letter Y
 
    {0x44,0x64,0x54,0x4C,0x44},         //   ( 90)  z - 0x007A Latin Small Letter Z
 
    {0x00,0x08,0x36,0x41,0x00},         //   ( 91)  { - 0x007B Left Curly Bracket
 
    {0x00,0x00,0x7F,0x00,0x00},         //   ( 92)  | - 0x007C Vertical Line
 
    {0x00,0x41,0x36,0x08,0x00},         //   ( 93)  } - 0x007D Right Curly Bracket
 
    {0x02,0x01,0x02,0x04,0x02},         //   ( 94)  ~ - 0x007E Tilde
 
    {0x08,0x14,0x2A,0x14,0x22},         //   ( 95) << - 0x00AB Left-Pointing Double Angle Quotation Mark
 
    {0x00,0x02,0x05,0x02,0x00},         //   ( 96)    - 0x00B0 Degree Sign
 
//    {0x44,0x44,0x5F,0x44,0x44},         //   ( 97) +- - 0x00B1 Plus-Minus Sign
 
//    {0x7E,0x20,0x20,0x10,0x3E},         //   ( 98)  u - 0x00B5 Micro Sign
 
//    {0x22,0x14,0x2A,0x14,0x08},         //   ( 99) >> - 0x00BB Right-Pointing Double Angle Quotation Mark
 
//    {0x30,0x48,0x45,0x40,0x20},         //   (100)  ? - 0x00BF Inverted Question Mark
 
//    {0x22,0x14,0x08,0x14,0x22},         //   (101)  x - 0x00D7 Multiplcation Sign
 
//    {0x08,0x08,0x2A,0x08,0x08},         //   (102)  + - 0x00F7 Division Sign
 
//    {0x18,0x14,0x08,0x14,0x0C},         //   (103)    - 0x221E Infinity
 
//    {0x44,0x4A,0x4A,0x51,0x51},         //   (104)  < - 0x2264 Less-Than or Equal to
 
//    {0x51,0x51,0x4A,0x4A,0x44},         //   (105)  > - 0x2265 Greater-Than or Equal to
 
//    {0x54,0x14,0x64,0x08,0x70},         //   (106)  .: - RF Symbol
 
//    {0x70,0x7C,0x72,0x7C,0x70},         //   (107)  ^ - Lock symbol
 
//    {0x70,0x5C,0x52,0x54,0x70},         //   (108)  / - Unlock symbol
 
//    {0x0C,0x1E,0x3C,0x1E,0x0C},         //   (109)  <3 - Heart Symbol
 
//    {0x18,0x22,0xFF,0x12,0x0C},         //   (110)  U - USB Symbol
 
};
 
 
 
static void setStartPage(unsigned char d)
 
{
 
    WriteCommand(0xB0|d);       // Set Page Start Address for Page Addressing Mode
 
                                // Default => 0xB0 (0x00)
 
}
 
/* Below are functions used to configure the OLED */
 
static void setStartColumn(unsigned char d)
 
{
 
    WriteCommand(0x00+d%16);    // Set Lower Column Start Address for Page Addressing Mode
 
    WriteCommand(0x10+d/16);    // Set Higher Column Start Address for Page Addressing Mode
 
                                // Default => 0x10
 
}
 
 
 
const uint8_t row[4][32] = {
 
 
	{0x00,0x00,0x01,0x03,0x07,0x0F,0x1E,0x3C,0x3C,0x7C,0x7C,0x7C,0xFC,0xFF,0xFF,0xFC,0xFC,0xFC,0xFC,0xFF,0x7F,0x7F,0x7F,0x3C,0x3C,0x1C,0x0C,0x06,0x03,0x01,0x00,0x00},
 
 
	{0x0F,0x7F,0xFF,0xFF,0xFF,0xFF,0x00,0x00,0x00,0x00,0x3F,0x3F,0x7F,0xFF,0xFF,0x00,0x00,0x00,0x00,0xFF,0xFF,0xFF,0xFF,0x00,0x00,0x00,0x00,0x00,0xFF,0xFF,0x7F,0x0F},
 
 
	{0xF0,0xFE,0xFF,0xFF,0xFF,0xC7,0x00,0x00,0x00,0x00,0x87,0xC7,0xC7,0xFF,0xFF,0x00,0x00,0x00,0x00,0x87,0x87,0xC7,0xC3,0x03,0x07,0x07,0x0F,0x7F,0xFF,0xFF,0xFE,0xF0},
 
 
	{0x00,0x00,0x80,0xC0,0xE0,0xF0,0xF8,0xFC,0xFC,0xFE,0xFE,0xFE,0xFF,0xFF,0xFF,0x1F,0x1F,0x1F,0x1F,0xFF,0xFE,0xFE,0xFE,0xFC,0xFC,0xF8,0xF0,0xE0,0xC0,0x80,0x00,0x00},
 
 
};
 
 
void ssd1306_clearscreen()
 
{
 
    uint8_t i = 0;
 
    uint8_t page = 0;
 
    for(page = 0; page<4; page++)
 
    {
 
        setStartPage(page);
 
        setStartColumn(0);
 
        for(i = 0; i<128; i++)
 
        {
 
            WriteData(0x00);
 
        }
 
    }
 
    WriteData(0x00);
 
}
 
 
void ssd1306_drawlogo()
 
{
 
    uint8_t i = 0;
 
    setStartPage(3);
 
    setStartColumn(0);
 
    for(i = 0; i<32; i++)
 
    {
 
        WriteData(row[0][i]);
 
    }
 
 
    WriteData(0x00);
 
 
    setStartPage(2);
 
    setStartColumn(0);
 
    for(i = 0; i<32; i++)
 
    {
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