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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
#define SSD1306_MISO_PORT GPIOB
#define SSD1306_MISO_PIN 8
#define SSD1306_MOSI_PORT GPIOB
#define SSD1306_MOSI_PIN 7
#define SSD1306_SCK_PORT GPIOB
#define SSD1306_SCK_PIN 6
#define SSD1306_CS_PORT GPIOB
#define SSD1306_CS_PIN 5
#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;
/*
* SPI1 configuration structure.
* Speed 42MHz, CPHA=0, CPOL=0, 8bits frames, MSb transmitted first.
* The slave select line is the pin 4 on the port GPIOA.
*/
static const SPIConfig spi1config = {
NULL,
/* HW dependent part.*/
SSD1306_MISO_PORT,
SSD1306_MISO_PIN,
0
//SPI_CR1_BR_0
};
/**
* @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);
spiInit();
palSetPadMode(SSD1306_MISO_PORT, SSD1306_MISO_PIN, PAL_MODE_ALTERNATE(1)|
PAL_STM32_OSPEED_HIGHEST);
palSetPadMode(SSD1306_MOSI_PORT, SSD1306_MOSI_PIN, PAL_MODE_ALTERNATE(1)|
PAL_STM32_OSPEED_HIGHEST);
palSetPadMode(SSD1306_SCK_PORT, SSD1306_SCK_PIN, PAL_MODE_ALTERNATE(1)|
PAL_STM32_OSPEED_HIGHEST);
palSetPad(SSD1306_CS_PORT, SSD1306_CS_PIN);
palSetPadMode(SSD1306_CS_PORT, SSD1306_CS_PIN, PAL_MODE_ALTERNATE(1)|
PAL_STM32_OSPEED_HIGHEST);
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) {
spiAcquireBus(&SPID1);
}
/**
* @brief Release exclusive control of the bus
* @notapi
*/
static inline void release_bus(void) {
spiReleaseBus(&SPID1);
}
/**
* @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;
spiStart(&SPID1, &spi1config);
spiSelect(&SPID1);
spiStartSend(&SPID1, txLength, command);
spiUnselect(&SPID1);
spiStop(&SPID1);
}
/**
* @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;
command[0] = 0x40; // Co = 0, D/C = 1
memmove(&command[1], data, length);
spiStart(&SPID1, &spi1config);
spiSelect(&SPID1);
spiStartSend(&SPID1, txLength, command);
spiUnselect(&SPID1);
spiStop(&SPID1);
}
#endif /* _GDISP_LLD_BOARD_H */
/** @} */
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