140 lines
3.5 KiB
C
140 lines
3.5 KiB
C
/*
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* This file is subject to the terms of the GFX License. If a copy of
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* the license was not distributed with this file, you can obtain one at:
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*
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* http://ugfx.org/license.html
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*/
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#ifndef _GDISP_LLD_BOARD_H
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#define _GDISP_LLD_BOARD_H
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#define SSD1306_RESET_PORT GPIOB
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#define SSD1306_RESET_PIN 5
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#define SSD1306_MISO_PORT GPIOB
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#define SSD1306_MISO_PIN 8
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#define SSD1306_MOSI_PORT GPIOB
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#define SSD1306_MOSI_PIN 7
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#define SSD1306_SCK_PORT GPIOB
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#define SSD1306_SCK_PIN 6
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#define SSD1306_CS_PORT GPIOB
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#define SSD1306_CS_PIN 5
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#define SET_RST palSetPad(SSD1306_RESET_PORT, SSD1306_RESET_PIN);
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#define CLR_RST palClearPad(SSD1306_RESET_PORT, SSD1306_RESET_PIN);
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int8_t vccstate;
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int32_t row_offset = 0;
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/*
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* SPI1 configuration structure.
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* Speed 42MHz, CPHA=0, CPOL=0, 8bits frames, MSb transmitted first.
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* The slave select line is the pin 4 on the port GPIOA.
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*/
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static const SPIConfig spi1config = {
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NULL,
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/* HW dependent part.*/
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SSD1306_MISO_PORT,
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SSD1306_MISO_PIN,
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0
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//SPI_CR1_BR_0
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};
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/**
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* @brief Initialize the board for the display.
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* @notes This board definition uses GPIO and assumes exclusive access to these GPIO pins
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* @notapi
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*/
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static inline void init_board(void) {
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// RESET pin.
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palSetPadMode(SSD1306_RESET_PORT, SSD1306_RESET_PIN, PAL_MODE_OUTPUT_PUSHPULL);
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spiInit();
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palSetPadMode(SSD1306_MISO_PORT, SSD1306_MISO_PIN, PAL_MODE_ALTERNATE(1)|
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PAL_STM32_OSPEED_HIGHEST);
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palSetPadMode(SSD1306_MOSI_PORT, SSD1306_MOSI_PIN, PAL_MODE_ALTERNATE(1)|
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PAL_STM32_OSPEED_HIGHEST);
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palSetPadMode(SSD1306_SCK_PORT, SSD1306_SCK_PIN, PAL_MODE_ALTERNATE(1)|
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PAL_STM32_OSPEED_HIGHEST);
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palSetPad(SSD1306_CS_PORT, SSD1306_CS_PIN);
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palSetPadMode(SSD1306_CS_PORT, SSD1306_CS_PIN, PAL_MODE_ALTERNATE(1)|
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PAL_STM32_OSPEED_HIGHEST);
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vccstate = SSD1306_SWITCHCAPVCC;
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}
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/**
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* @brief Set or clear the lcd reset pin.
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* @param[in] state TRUE = lcd in reset, FALSE = normal operation
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* @notapi
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*/
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static inline void setpin_reset(bool_t state) {
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if(state)
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SET_RST
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else
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CLR_RST
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}
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/**
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* @brief Set the lcd back-light level.
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* @param[in] percent 0 to 100%
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* @notapi
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*/
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static inline void set_backlight(uint8_t percent) {
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// Since we are on OLED no backlight needed
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}
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/**
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* @brief Take exclusive control of the bus
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* @notapi
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*/
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static inline void acquire_bus(void) {
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spiAcquireBus(&SPID1);
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}
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/**
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* @brief Release exclusive control of the bus
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* @notapi
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*/
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static inline void release_bus(void) {
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spiReleaseBus(&SPID1);
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}
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/**
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* @brief Send command to the display.
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* @param[in] cmd The command to send *
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* @notapi
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*/
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static inline void write_cmd(uint8_t cmd) {
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uint8_t command[] = { 0x00, // Co = 0, D/C = 0
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cmd },
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txLength = sizeof(command)/sizeof(command[0]),
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rxLength = 0;
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spiStart(&SPID1, &spi1config);
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spiSelect(&SPID1);
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spiStartSend(&SPID1, txLength, command);
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spiUnselect(&SPID1);
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spiStop(&SPID1);
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}
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/**
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* @brief Send data to the display.
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* @param[in] data The data to send
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* @notapi
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*/
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static inline void write_data(uint8_t* data, uint16_t length) {
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uint8_t command[length+1],
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txLength = length+1;
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command[0] = 0x40; // Co = 0, D/C = 1
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memmove(&command[1], data, length);
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spiStart(&SPID1, &spi1config);
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spiSelect(&SPID1);
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spiStartSend(&SPID1, txLength, command);
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spiUnselect(&SPID1);
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spiStop(&SPID1);
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}
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#endif /* _GDISP_LLD_BOARD_H */
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/** @} */
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