133 lines
3.5 KiB
C
133 lines
3.5 KiB
C
/*
|
|
* 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
|
|
*/
|
|
|
|
/**
|
|
* @file boards/addons/gdisp/board_SSD1306_i2c.h
|
|
* @brief GDISP Graphic Driver subsystem board interface for the SSD1306 display.
|
|
*
|
|
* @note This file contains a mix of hardware specific and operating system specific
|
|
* code. You will need to change it for your CPU and/or operating system.
|
|
*/
|
|
|
|
#ifndef _GDISP_LLD_BOARD_H
|
|
#define _GDISP_LLD_BOARD_H
|
|
|
|
// The command byte to put on the front of each page line
|
|
#define SSD1306_PAGE_PREFIX 0x40 // Co = 0, D/C = 1
|
|
|
|
// For a multiple display configuration we would put all this in a structure and then
|
|
// set g->board to that structure.
|
|
#define SSD1306_RESET_PORT GPIOB
|
|
#define SSD1306_RESET_PIN 5
|
|
|
|
/**
|
|
* The default slave address is 0x3D, (talking about
|
|
* only the real address part here) and the slave
|
|
* address can be changed to 0x3C by soldering the
|
|
* SA0 pads on the bottom side of the module.
|
|
*
|
|
* b7 | b6 | b5 | b4 | b3 | b2 | b1 | b0
|
|
* --------------------------------------
|
|
* 0 | 1 | 1 | 1 | 1 | 0 |SA0 | R/W
|
|
*/
|
|
#define SSD1306_I2C_ADDRESS 0x3D
|
|
#define SSD1306_SDA_PORT GPIOB
|
|
#define SSD1306_SDA_PIN 7
|
|
#define SSD1306_SCL_PORT GPIOB
|
|
#define SSD1306_SCL_PIN 6
|
|
#define SET_RST palSetPad(SSD1306_RESET_PORT, SSD1306_RESET_PIN);
|
|
#define CLR_RST palClearPad(SSD1306_RESET_PORT, SSD1306_RESET_PIN);
|
|
|
|
// I2C configuration structure.
|
|
static I2CConfig i2cconfig;
|
|
|
|
#if GFX_USE_OS_CHIBIOS
|
|
static int32_t thdPriority = 0;
|
|
#endif
|
|
|
|
static inline void init_board(GDisplay *g) {
|
|
|
|
// As we are not using multiple displays we set g->board to NULL as we don't use it.
|
|
g->board = 0;
|
|
|
|
switch(g->controllerdisplay) {
|
|
case 0: // Set up for Display 0
|
|
// RESET pin.
|
|
palSetPadMode(SSD1306_RESET_PORT, SSD1306_RESET_PIN, PAL_MODE_OUTPUT_PUSHPULL);
|
|
|
|
|
|
/*
|
|
* Initializes the I2C driver 1. The I2C1 signals are routed as follows:
|
|
* PB6 - SCL.
|
|
* PB7 - SDA.
|
|
* Timing value comes from ST I2C config tool (xls):
|
|
* 0x00901D2B; // 100kHz Standard Mode
|
|
* 0x00300444; // 100kHz Fast Mode
|
|
* 0x0030020A; // 400kHz Fast Mode
|
|
* 0x00100002; // 800kHz Fast Mode +
|
|
*/
|
|
palSetPadMode(SSD1306_SCL_PORT, SSD1306_SCL_PIN, PAL_MODE_ALTERNATE(1));
|
|
palSetPadMode(SSD1306_SDA_PORT, SSD1306_SDA_PIN, PAL_MODE_ALTERNATE(1));
|
|
i2cconfig.timingr = 0x00100002; // 800kHz Fast Mode+
|
|
i2cInit();
|
|
break;
|
|
}
|
|
}
|
|
|
|
static inline void post_init_board(GDisplay *g) {
|
|
(void) g;
|
|
}
|
|
|
|
static inline void setpin_reset(GDisplay *g, bool_t state) {
|
|
(void) g;
|
|
if(state)
|
|
CLR_RST
|
|
else
|
|
SET_RST
|
|
}
|
|
|
|
static inline void acquire_bus(GDisplay *g) {
|
|
(void) g;
|
|
#if GFX_USE_OS_CHIBIOS
|
|
thdPriority = (int32_t)chThdGetPriority();
|
|
chThdSetPriority(HIGHPRIO);
|
|
#endif
|
|
i2cAcquireBus(&I2CD1);
|
|
}
|
|
|
|
static inline void release_bus(GDisplay *g) {
|
|
(void) g;
|
|
#if GFX_USE_OS_CHIBIOS
|
|
chThdSetPriority(thdPriority);
|
|
#endif
|
|
i2cReleaseBus(&I2CD1);
|
|
}
|
|
|
|
static inline void write_cmd(GDisplay *g, uint8_t cmd) {
|
|
uint8_t command[2];
|
|
(void) g;
|
|
|
|
command[0] = 0x00; // Co = 0, D/C = 0
|
|
command[1] = cmd;
|
|
|
|
i2cStart(&I2CD1, &i2cconfig);
|
|
i2cMasterTransmitTimeout(&I2CD1, SSD1306_I2C_ADDRESS, command, 2, 0, 0, MS2ST(10));
|
|
i2cStop(&I2CD1);
|
|
}
|
|
|
|
static inline void write_data(GDisplay *g, uint8_t* data, uint16_t length) {
|
|
(void) g;
|
|
|
|
i2cStart(&I2CD1, &i2cconfig);
|
|
i2cMasterTransmitTimeout(&I2CD1, SSD1306_I2C_ADDRESS, data, length, 0, 0, MS2ST(10));
|
|
i2cStop(&I2CD1);
|
|
}
|
|
|
|
#endif /* _GDISP_LLD_BOARD_H */
|
|
|
|
|