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/*
* 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 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);
int8_t vccstate;
int32_t row_offset = 0;
// I2C configuration structure.
static I2CConfig i2cconfig;
/**
* @brief Initialize the board for the display.
* @notes This board definition uses GPIO and assumes exclusive access to these GPIO pins
* @notapi
*/
static inline void init_board(void) {
// 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 +
*/
i2cconfig.timingr = 0x00100002; // 800kHz Fast Mode+
i2cInit();
palSetPadMode(SSD1306_SCL_PORT, SSD1306_SCL_PIN, PAL_MODE_ALTERNATE(1));
palSetPadMode(SSD1306_SDA_PORT, SSD1306_SDA_PIN, PAL_MODE_ALTERNATE(1));
vccstate = SSD1306_SWITCHCAPVCC;
}
/**
* @brief Set or clear the lcd reset pin.
* @param[in] state TRUE = lcd in reset, FALSE = normal operation
* @notapi
*/
static inline void setpin_reset(bool_t state) {
if(state)
SET_RST
else
CLR_RST
}
/**
* @brief Set the lcd back-light level.
* @param[in] percent 0 to 100%
* @notapi
*/
static inline void set_backlight(uint8_t percent) {
// Since we are on OLED no backlight needed
}
/**
* @brief Take exclusive control of the bus
* @notapi
*/
static inline void acquire_bus(void) {
i2cAcquireBus(&I2CD1);
}
/**
* @brief Release exclusive control of the bus
* @notapi
*/
static inline void release_bus(void) {
i2cReleaseBus(&I2CD1);
}
/**
* @brief Send command to the display.
* @param[in] cmd The command to send *
* @notapi
*/
static inline void write_cmd(uint8_t cmd) {
uint8_t command[] = { 0x00, // Co = 0, D/C = 0
cmd },
txLength = sizeof(command)/sizeof(command[0]),
rxLength = 0;
i2cStart(&I2CD1, &i2cconfig);
i2cMasterTransmitTimeout(&I2CD1, SSD1306_I2C_ADDRESS, command, txLength, NULL, rxLength, MS2ST(10));
i2cStop(&I2CD1);
}
/**
* @brief Send data to the display.
* @param[in] data The data to send
* @notapi
*/
static inline void write_data(uint8_t* data, uint16_t length) {
uint8_t command[length+1],
txLength = length+1,
rxLength = 0;
command[0] = 0x40; // Co = 0, D/C = 1
memmove(&command[1], data, length);
i2cStart(&I2CD1, &i2cconfig);
i2cMasterTransmitTimeout(&I2CD1, SSD1306_I2C_ADDRESS, command, txLength, NULL, rxLength, MS2ST(10));
i2cStop(&I2CD1);
}
#endif /* _GDISP_LLD_BOARD_H */
/** @} */
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