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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
// For a multiple display configuration we would put all this in a structure and then
// set g->board to that structure.
/* Using FSMC A19 (PE3) as DC */
#define GDISP_REG (*((volatile uint16_t *) 0x60000000)) /* DC = 0 */
#define GDISP_RAM (*((volatile uint16_t *) 0x60100000)) /* DC = 1 */
#define GDISP_DMA_STREAM STM32_DMA2_STREAM6
#define SET_RST palSetPad(GPIOD, 3);
#define CLR_RST palClearPad(GPIOD, 3);
/*
* PWM configuration structure. We use timer 4 channel 2 (orange LED on board).
* The reason for so high clock is that with any lower, onboard coil is squeaking.
* The major disadvantage of this clock is a lack of linearity between PWM duty
* cycle width and brightness. In fact only with low preset one sees any change
* (eg. duty cycle between 1-20). Feel free to adjust this, maybe only my board
* behaves like this. According to the G5126 datesheet (backlight LED driver)
* the PWM frequency should be somewhere between 200 Hz to 200 kHz.
*/
static const PWMConfig pwmcfg = {
20000, /* 20 KHz PWM clock frequency. */
100, /* PWM period is 100 cycles. */
0,
{
{PWM_OUTPUT_ACTIVE_HIGH, 0},
{PWM_OUTPUT_ACTIVE_HIGH, 0},
{PWM_OUTPUT_ACTIVE_HIGH, 0},
{PWM_OUTPUT_ACTIVE_HIGH, 0}
},
0,
0
};
static GFXINLINE 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
#if defined(STM32F4XX) || defined(STM32F2XX)
/* STM32F4 FSMC init */
rccEnableAHB3(RCC_AHB3ENR_FSMCEN, 0);
#if defined(GDISP_USE_DMA) && defined(GDISP_DMA_STREAM)
if (dmaStreamAllocate(GDISP_DMA_STREAM, 0, 0, 0))
gfxExit();
dmaStreamSetMemory0(GDISP_DMA_STREAM, &GDISP_RAM);
dmaStreamSetMode(GDISP_DMA_STREAM, STM32_DMA_CR_PL(0) | STM32_DMA_CR_PSIZE_HWORD | STM32_DMA_CR_MSIZE_HWORD | STM32_DMA_CR_DIR_M2M);
#endif
#else
#error "FSMC not implemented for this device"
#endif
/* Group pins */
IOBus busD = {GPIOD, (1 << 0) | (1 << 1) | (1 << 4) | (1 << 5) | (1 << 7) | (1 << 8) |
(1 << 9) | (1 << 10) | (1 << 14) | (1 << 15), 0};
IOBus busE = {GPIOE, (1 << 3) | (1 << 7) | (1 << 8) | (1 << 9) | (1 << 10) | (1 << 11) | (1 << 12) |
(1 << 13) | (1 << 14) | (1 << 15), 0};
/* FSMC is an alternate function 12 (AF12) */
palSetBusMode(&busD, PAL_MODE_ALTERNATE(12));
palSetBusMode(&busE, PAL_MODE_ALTERNATE(12));
/* FSMC timing register configuration */
// FSMC_Bank1->BTCR[0 + 1] = (FSMC_BTR1_ADDSET_2 | FSMC_BTR1_ADDSET_1) \
// | (FSMC_BTR1_DATAST_2 | FSMC_BTR1_DATAST_1) \
// | FSMC_BTR1_BUSTURN_0;
FSMC_Bank1->BTCR[0 + 1] = (FSMC_BTR1_ADDSET_3 | FSMC_BTR1_ADDSET_0) \
| (FSMC_BTR1_DATAST_3 | FSMC_BTR1_DATAST_0) \
| FSMC_BTR1_BUSTURN_0;
/* Bank1 NOR/PSRAM control register configuration
* Write enable, memory databus width set to 16 bit, memory bank enable */
FSMC_Bank1->BTCR[0] = FSMC_BCR1_WREN | FSMC_BCR1_MWID_0 | FSMC_BCR1_MBKEN;
/* Display backlight control */
/* TIM4 is an alternate function 2 (AF2) */
pwmStart(&PWMD4, &pwmcfg);
palSetPadMode(GPIOD, 13, PAL_MODE_ALTERNATE(2));
pwmEnableChannel(&PWMD4, 1, 100);
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 set_backlight(GDisplay *g, uint8_t percent) {
(void) g;
pwmEnableChannel(&PWMD4, 1, percent);
}
static GFXINLINE void acquire_bus(GDisplay *g) {
(void) g;
}
static GFXINLINE void release_bus(GDisplay *g) {
(void) g;
}
static GFXINLINE void write_index(GDisplay *g, uint16_t index) {
(void) g;
GDISP_REG = index;
}
static GFXINLINE void write_data(GDisplay *g, uint16_t data) {
(void) g;
GDISP_RAM = data;
}
static GFXINLINE void setreadmode(GDisplay *g) {
(void) g;
}
static GFXINLINE void setwritemode(GDisplay *g) {
(void) g;
}
static GFXINLINE uint16_t read_data(GDisplay *g) {
(void) g;
return GDISP_RAM;
}
#if defined(GDISP_USE_DMA)
static GFXINLINE void dma_with_noinc(GDisplay *g, color_t *buffer, int area) {
(void) g;
dmaStreamSetPeripheral(GDISP_DMA_STREAM, buffer);
dmaStreamSetMode(GDISP_DMA_STREAM, STM32_DMA_CR_PL(0) | STM32_DMA_CR_PSIZE_HWORD | STM32_DMA_CR_MSIZE_HWORD | STM32_DMA_CR_DIR_M2M);
for (; area > 0; area -= 65535) {
dmaStreamSetTransactionSize(GDISP_DMA_STREAM, area > 65535 ? 65535 : area);
dmaStreamEnable(GDISP_DMA_STREAM);
dmaWaitCompletion(GDISP_DMA_STREAM);
}
}
static GFXINLINE void dma_with_inc(GDisplay *g, color_t *buffer, int area) {
(void) g;
dmaStreamSetPeripheral(GDISP_DMA_STREAM, buffer);
dmaStreamSetMode(GDISP_DMA_STREAM, STM32_DMA_CR_PL(0) | STM32_DMA_CR_PINC | STM32_DMA_CR_PSIZE_HWORD | STM32_DMA_CR_MSIZE_HWORD | STM32_DMA_CR_DIR_M2M);
for (; area > 0; area -= 65535) {
dmaStreamSetTransactionSize(GDISP_DMA_STREAM, area > 65535 ? 65535 : area);
dmaStreamEnable(GDISP_DMA_STREAM);
dmaWaitCompletion(GDISP_DMA_STREAM);
}
}
#endif
#endif /* _GDISP_LLD_BOARD_H */
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