From fb5a321dd7c2848128b04b306f3e1e59c87a3f70 Mon Sep 17 00:00:00 2001
From: Stijn Kuipers <stijnkuipers@gmail.com>
Date: Thu, 29 Jun 2023 16:26:07 +0200
Subject: Initial Filedump

Tadaaa!!
---
 sw/Core/Src/oled.h | 139 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 139 insertions(+)
 create mode 100755 sw/Core/Src/oled.h

(limited to 'sw/Core/Src/oled.h')

diff --git a/sw/Core/Src/oled.h b/sw/Core/Src/oled.h
new file mode 100755
index 0000000..4c27954
--- /dev/null
+++ b/sw/Core/Src/oled.h
@@ -0,0 +1,139 @@
+/*
+ * oled.h
+ *
+ *  Created on: Oct 22, 2019
+ *      Author: mmalex
+ */
+
+#ifndef OLED_H_
+#define OLED_H_
+
+#define W 128
+#define H 32
+
+void oled_flip(const u8* vram_with_offset);
+void oled_init(void);
+
+#ifdef IMPL
+#define SSD1306_COLUMNADDR 0x21
+#define SSD1306_DISPLAYOFF 0xAE
+#define SSD1306_DISPLAYON 0xAF
+#define SSD1306_PAGEADDR   0x22
+#define SSD1306_SETDISPLAYCLOCKDIV 0xD5
+#define SSD1306_SETPRECHARGE 0xD9
+#define SSD1306_SETCONTRAST 0x81
+#define SSD1306_SETDISPLAYOFFSET 0xD3
+#define SSD1306_SETMULTIPLEX 0xA8
+#define SSD1306_SETSTARTLINE 0x40
+#define SSD1306_CHARGEPUMP 0x8D
+#define SSD1306_SEGREMAP 0xA0
+#define SSD1306_COMSCANDEC 0xC8
+#define SSD1306_COMSCANINC 0xC0
+#define SSD1306_MEMORYMODE 0x20
+#define SSD1306_SETCOMPINS 0xDA
+#define SSD1306_SETVCOMDETECT 0xDB
+#define SSD1306_DISPLAYALLON_RESUME 0xA4
+#define SSD1306_NORMALDISPLAY 0xA6
+#define SSD1306_DEACTIVATE_SCROLL 0x2E
+#define SSD1306_EXTERNALVCC 0x1
+#define SSD1306_SWITCHCAPVCC 0x2
+#define SSD1306_DISPLAYALLON 0xA5
+#define SSD1306_INVERTDISPLAY 0xA7
+#define SSD1306_SETLOWCOLUMN 0x00
+#define SSD1306_SETHIGHCOLUMN 0x10
+#include "logo.h"
+
+const static unsigned char oled_i2caddr = 0x3c << 1;
+
+static inline void ssd1306_command(unsigned char c) {
+#ifndef EMU
+	u8 buf[2] = { 0, c };
+	HAL_StatusTypeDef r = HAL_I2C_Master_Transmit(&hi2c2, oled_i2caddr, buf, 2, I2C_TIMEOUT);
+	if (r != HAL_OK)
+		DebugLog("error in ssd1306 command %d\r\n", (int) r);
+	HAL_Delay(1);
+#endif
+}
+
+
+static inline bool oled_busy(void) {
+#ifndef EMU
+	return HAL_I2C_GetState(&hi2c2) == HAL_I2C_STATE_BUSY_TX;
+#else
+	return false;
+#endif
+}
+
+static inline void oled_wait(void) {
+	  while (oled_busy()) ;
+}
+
+bool update_accelerometer_raw(void);
+
+
+void oled_flip(const u8* vram_with_offset) {
+//	  HAL_GPIO_WritePin(LD2_GPIO_Port, LD2_Pin, GPIO_PIN_RESET);
+	// send a bunch of data in one xmission
+	oled_wait();
+#ifndef EMU
+	ssd1306_command(0); // Page start address (0 = reset)
+//	ssd1306_command(3); // Page end address - 32 pixels. 1=16 pixels
+
+	HAL_StatusTypeDef r = 	HAL_I2C_Master_Transmit(&hi2c2, oled_i2caddr, (u8*)vram_with_offset, W * H / 8+1, 500);
+	if (r != HAL_OK)
+		DebugLog("error in ssd1306 data %d\r\n", (int) r);
+	update_accelerometer_raw();
+#else
+	void OledFlipEmu(const u8 *vram);
+	OledFlipEmu(vram_with_offset);
+#endif
+}
+
+
+void oled_init(void) {
+	// Init sequence
+	ssd1306_command(SSD1306_DISPLAYOFF);                    // 0xAE
+	ssd1306_command(SSD1306_SETDISPLAYCLOCKDIV);            // 0xD5
+	ssd1306_command(0x80);                                  // the suggested ratio 0x80
+
+	ssd1306_command(SSD1306_SETMULTIPLEX);                  // 0xA8
+	ssd1306_command(H - 1);
+
+	ssd1306_command(SSD1306_SETDISPLAYOFFSET);              // 0xD3
+	ssd1306_command(0x0);                                   // no offset
+	ssd1306_command(SSD1306_SETSTARTLINE | 0x0);            // line #0
+	ssd1306_command(SSD1306_CHARGEPUMP);                    // 0x8D
+	ssd1306_command(0x14);  // switchcap
+	ssd1306_command(SSD1306_MEMORYMODE);                    // 0x20
+	ssd1306_command(0x00);                                  // 0x0 act like ks0108
+	ssd1306_command(SSD1306_SEGREMAP | 0x1);
+	ssd1306_command(SSD1306_COMSCANDEC);
+	ssd1306_command(SSD1306_SETCOMPINS);                    // 0xDA
+	ssd1306_command(0x02);
+	ssd1306_command(SSD1306_SETCONTRAST);                   // 0x81
+	ssd1306_command(0x8F);
+
+	ssd1306_command(SSD1306_SETPRECHARGE);                  // 0xd9
+	ssd1306_command(0xF1); // switchcap
+	ssd1306_command(SSD1306_SETVCOMDETECT);                 // 0xDB
+	ssd1306_command(0x40);
+	ssd1306_command(SSD1306_DISPLAYALLON_RESUME);           // 0xA4
+	ssd1306_command(SSD1306_NORMALDISPLAY);                 // 0xA6
+
+	ssd1306_command(SSD1306_DEACTIVATE_SCROLL);
+
+// put the plinky logo up before switching on the screen
+	// prepare flip
+	ssd1306_command(SSD1306_COLUMNADDR);
+	ssd1306_command(0);   // Column start address (0 = reset)
+	ssd1306_command(W - 1); // Column end address (127 = reset)
+	ssd1306_command(SSD1306_PAGEADDR);
+	ssd1306_command(0); // Page start address (0 = reset)
+	ssd1306_command(3); // Page end address - 32 pixels. 1=16 pixels
+	ssd1306_command(SSD1306_DISPLAYON);                 //--turn on oled panel
+
+	oled_flip(logobuf);
+	oled_wait();
+}
+#endif
+#endif /* OLED_H_ */
-- 
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