137 lines
3.5 KiB
C
137 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_spi.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
|
|
#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);
|
|
|
|
/*
|
|
* 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 = {
|
|
0,
|
|
/* HW dependent part.*/
|
|
SSD1306_MISO_PORT,
|
|
SSD1306_MISO_PIN,
|
|
0
|
|
//SPI_CR1_BR_0
|
|
};
|
|
|
|
#if GFX_USE_OS_CHIBIOS
|
|
static int32_t thdPriority = 0;
|
|
#endif
|
|
|
|
static GFXINLINE void init_board(GDisplay *g) {
|
|
unsigned i;
|
|
|
|
// 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);
|
|
|
|
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);
|
|
spiInit();
|
|
break;
|
|
}
|
|
}
|
|
|
|
static GFXINLINE void post_init_board(GDisplay *g) {
|
|
(void) g;
|
|
}
|
|
|
|
static GFXINLINE void setpin_reset(GDisplay *g, bool_t state) {
|
|
(void) g;
|
|
if(state)
|
|
CLR_RST
|
|
else
|
|
SET_RST
|
|
}
|
|
|
|
static GFXINLINE void acquire_bus(GDisplay *g) {
|
|
(void) g;
|
|
#if GFX_USE_OS_CHIBIOS
|
|
thdPriority = (int32_t)chThdGetPriority();
|
|
chThdSetPriority(HIGHPRIO);
|
|
#endif
|
|
spiAcquireBus(&SPID1);
|
|
}
|
|
|
|
static GFXINLINE void release_bus(GDisplay *g) {
|
|
(void) g;
|
|
#if GFX_USE_OS_CHIBIOS
|
|
chThdSetPriority(thdPriority);
|
|
#endif
|
|
spiReleaseBus(&SPID1);
|
|
}
|
|
|
|
static GFXINLINE 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;
|
|
|
|
spiStart(&SPID1, &spi1config);
|
|
spiSelect(&SPID1);
|
|
spiStartSend(&SPID1, 2, command);
|
|
spiUnselect(&SPID1);
|
|
spiStop(&SPID1);
|
|
}
|
|
|
|
static GFXINLINE void write_data(GDisplay *g, uint8_t* data, uint16_t length) {
|
|
(void) g;
|
|
|
|
spiStart(&SPID1, &spi1config);
|
|
spiSelect(&SPID1);
|
|
spiStartSend(&SPID1, length, data);
|
|
spiUnselect(&SPID1);
|
|
spiStop(&SPID1);
|
|
}
|
|
|
|
|
|
#endif /* _GDISP_LLD_BOARD_H */
|
|
|