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author | inmarket <andrewh@inmarket.com.au> | 2015-04-07 23:24:09 +1000 |
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committer | inmarket <andrewh@inmarket.com.au> | 2015-04-07 23:24:09 +1000 |
commit | b4aa4d565fd50749e2aa392ae898b7f6b3ef07a1 (patch) | |
tree | c3fdd086fa3cdc8d8d938753bb575f1de826463b /boards/addons/gdisp | |
parent | f1d75f32becd3583c1eab3baf32b0448b7100156 (diff) | |
download | uGFX-b4aa4d565fd50749e2aa392ae898b7f6b3ef07a1.tar.gz uGFX-b4aa4d565fd50749e2aa392ae898b7f6b3ef07a1.tar.bz2 uGFX-b4aa4d565fd50749e2aa392ae898b7f6b3ef07a1.zip |
Example board files for connecting "TinyScreen" - an arduino SSD1331 display from Tiny-Circuits
Diffstat (limited to 'boards/addons/gdisp')
-rw-r--r-- | boards/addons/gdisp/board_SSD1331_tinyscreen_arduino.cpp | 88 | ||||
-rw-r--r-- | boards/addons/gdisp/board_SSD1331_tinyscreen_arduino.h | 34 |
2 files changed, 122 insertions, 0 deletions
diff --git a/boards/addons/gdisp/board_SSD1331_tinyscreen_arduino.cpp b/boards/addons/gdisp/board_SSD1331_tinyscreen_arduino.cpp new file mode 100644 index 00000000..5065c34d --- /dev/null +++ b/boards/addons/gdisp/board_SSD1331_tinyscreen_arduino.cpp @@ -0,0 +1,88 @@ +#include <Arduino.h> +#include <SPI.h> +#include <Wire.h> + +#include "board_SSD1331.h" + +#define LCD_BOARD_ID 0 // 0 or 1 - set by the position of a resistor near SX1505 (see schematic and board design) + +// GPIO Pins +#define GPIO_DC 0x01 +#define GPIO_CS 0x02 +#define GPIO_RES 0x08 +#define GPIO_BTN1 0x10 +#define GPIO_BTN2 0x20 +#define GPIO_BTN3 0x40 +#define GPIO_BTN4 0x80 +#define GPIO_CMD_START ~(GPIO_CS|GPIO_DC) +#define GPIO_DATA_START ~GPIO_CS +#define GPIO_TRANSFER_END GPIO_CS + +//GPIO Registers +#define GPIO_RegData 0x00 +#define GPIO_RegDir 0x01 +#define GPIO_RegPullUp 0x02 + +// Wire address of the SX1505 chip +#define GPIO_ADDR 0x20 + +static void writeGPIO(uint8_t regAddr, uint8_t regData) +{ + uint8_t oldTWBR=TWBR; + TWBR=0; + Wire.beginTransmission(GPIO_ADDR + LCD_BOARD_ID); + Wire.write(regAddr); + Wire.write(regData); + Wire.endTransmission(); + TWBR=oldTWBR; +} + +static bool isDataMode = false; +static bool isCmdMode = false; + +void SSD1331_init_board(void) { + //setup GPIO, reset SSD1331 + writeGPIO(GPIO_RegData,~GPIO_RES);//reset low, CS/other pins high + writeGPIO(GPIO_RegDir,~GPIO_RES);//set reset to output + delay(5); + writeGPIO(GPIO_RegDir,~(GPIO_CS|GPIO_DC));//reset to input, CS/DC output + writeGPIO(GPIO_RegPullUp,GPIO_BTN1|GPIO_BTN2|GPIO_BTN3|GPIO_BTN4);//button pullup enable + //init SPI + SPI.begin(); + SPI.setDataMode(SPI_MODE0);//wrong mode, works because we're only writing. this mode is compatible with SD cards. + SPI.setClockDivider(SPI_CLOCK_DIV2); + + isDataMode = isCmdMode = false; +} + +void SSD1331_setpin_reset(int state) { + // Ignore this as we did it in the init_board +} + +void SSD1331_aquirebus(void) { + // Do nothing as we do it in the data transfer +} + +void SSD1331_releasebus(void) { + if (!isDataMode && !isCmdMode) return; + writeGPIO(GPIO_RegData,GPIO_TRANSFER_END); + isDataMode = isCmdMode = false; +} + +void SSD1331_write_cmd(uint8_t cmd) { + if (!isCmdMode) { + writeGPIO(GPIO_RegData,GPIO_CMD_START); + isDataMode = false; + isCmdMode = true; + } + SPI.transfer(cmd); +} + +void SSD1331_write_data(uint8_t data) { + if (!isDataMode) { + writeGPIO(GPIO_RegData,GPIO_DATA_START); + isDataMode = true; + isCmdMode = false; + } + SPI.transfer(data); +} diff --git a/boards/addons/gdisp/board_SSD1331_tinyscreen_arduino.h b/boards/addons/gdisp/board_SSD1331_tinyscreen_arduino.h new file mode 100644 index 00000000..17b125c8 --- /dev/null +++ b/boards/addons/gdisp/board_SSD1331_tinyscreen_arduino.h @@ -0,0 +1,34 @@ +/* + * This file is subject to the terms of the GFX License. If a copy of + * the license was not distributed with this file, you can obtain one at: + * + * http://ugfx.org/license.html + */ + +#ifndef _GDISP_LLD_BOARD_H +#define _GDISP_LLD_BOARD_H + +#define init_board(g) SSD1331_init_board() +#define post_init_board(g) +#define setpin_reset(g, state) SSD1331_setpin_reset(state) +#define acquire_bus(g) SSD1331_aquirebus() +#define release_bus(g) SSD1331_releasebus() +#define write_cmd(g, cmd) SSD1331_write_cmd(cmd) +#define write_data(g, data) SSD1331_write_data(data) + +#ifdef __cplusplus +extern "C" { +#endif + +void SSD1331_init_board(void); +void SSD1331_setpin_reset(int state); +void SSD1331_aquirebus(void); +void SSD1331_releasebus(void); +void SSD1331_write_cmd(uint8_t cmd); +void SSD1331_write_data(uint8_t data); + +#ifdef __cplusplus +} +#endif + +#endif /* _GDISP_LLD_BOARD_H */ |