Help with ili9325 and stm32f1

david1982 · February 15, 2015

Hello All,

I am trying to get my LCD to work but my data is sent via GPIOC 0...7 and GPIOB 8...15 and for the life of me I cannot get it to work.

All I am trying to do is get the gdisp circle demo going..

Below are my board file and driver file..

Please just a kick in the right direction would be appreciated.

board.h

#ifndef _BOARD_H_
#define _BOARD_H_

/*
 * Setup for the ST INEMO-M1 Discovery board.
 */

/*
 * Board identifier.
 */
#define BOARD_OLIMEX_STM32_LCD
#define BOARD_NAME              "Olimex STM32-LCD"

/*
 * Board frequencies.
 */
#define STM32_LSECLK            32768
#define STM32_HSECLK            8000000


/*
 * MCU type, supported types are defined in ./os/hal/platforms/hal_lld.h.
 */
#define STM32F10X_MD

/*
 * IO pins assignments.
 */
#define GPIOA_KEY1               0
#define GPIOA_KEY2               1
#define GPIOA_LED1               2
#define GPIOA_LED2               3
#define GPIOA_SPI1_NSS           4
#define GPIOA_SPI1_SCK           5
#define GPIOA_SPI1_MISO          6
#define GPIOA_SPI1_MOSI          7
#define GPIOA_PA8                8 /* FREE PA8/USART1_CK/TIM1_CH1/MCO */
#define GPIOA_USART1_TX          9
#define GPIOA_USART1_RX         10
#define GPIOA_PA11              11
#define GPIOA_PA12              12
#define GPIOA_SWDIO             13
#define GPIOA_SWCLK             14
#define GPIOA_PA15              15

#define GPIOB_PB0                0 /* VR */
#define GPIOB_PB1                1 /* FREE PB1/ADC12_IN9/TIM2_CH4/TIM1_CH3N */
#define GPIOB_PB2                2 /* BOOT */
#define GPIOB_PB3                3 /* JTAG JTDO */
#define GPIOB_PB4                4 /* JTAG JNTRST */
#define GPIOB_LE                 5
#define GPIOB_F_CS               6
#define GPIOB_SD_CS              7
#define GPIOB_DB08               8
#define GPIOB_DB09               9
#define GPIOB_DB10              10
#define GPIOB_DB11              11
#define GPIOB_DB12              12
#define GPIOB_DB13              13
#define GPIOB_DB14              14
#define GPIOB_DB15              15

#define GPIOC_DB00               0
#define GPIOC_DB01               1
#define GPIOC_DB02               2
#define GPIOC_DB03               3
#define GPIOC_DB04               4
#define GPIOC_DB05               5
#define GPIOC_DB06               6
#define GPIOC_DB07               7
#define GPIOC_CS                 8
#define GPIOC_RS                 9
#define GPIOC_WR                10
#define GPIOC_RD                11
#define GPIOC_BL_EN             12
#define GPIOC_TP_INT            13
#define GPIOC_PC14              14
#define GPIOC_PC15              15

#define GPIOD_OSC_IN            0
#define GPIOD_OSC_OUT           1
#define GPIOD_PD2               2

/*
 * I/O ports initial setup, this configuration is established soon after reset
 * in the initialization code.
 *
 * The digits have the following meaning:
 *   0 - Analog input.
 *   1 - Push Pull output 10MHz.
 *   2 - Push Pull output 2MHz.
 *   3 - Push Pull output 50MHz.
 *   4 - Digital input.
 *   5 - Open Drain output 10MHz.
 *   6 - Open Drain output 2MHz.
 *   7 - Open Drain output 50MHz.
 *   8 - Digital input with PullUp or PullDown resistor depending on ODR.
 *   9 - Alternate Push Pull output 10MHz.
 *   A - Alternate Push Pull output 2MHz.
 *   B - Alternate Push Pull output 50MHz.
 *   C - Reserved.
 *   D - Alternate Open Drain output 10MHz.
 *   E - Alternate Open Drain output 2MHz.
 *   F - Alternate Open Drain output 50MHz.
 * Please refer to the STM32 Reference Manual for details.
 */

#define VAL_GPIOACRL            0x88384B88      /*  PA7...PA0 */
#define VAL_GPIOACRH            0x88888883      /* PA15...PA8 */
#define VAL_GPIOAODR            0xFFFFBFDF

/*
 * Port B setup.
 * Everything input with pull-up except:
 * PB3  - Pull-up input             (GPIOA_SWO).
 */
#define VAL_GPIOBCRL            0x88388888      /*  PB7...PB0 */
#define VAL_GPIOBCRH            0xBBBBBBBB      /* PB15...PB8 */
#define VAL_GPIOBODR            0xFFFFFFFF

/*
 * Port C setup.
 * Everything input with pull-up except:
 * PC13 - Normal input              (GPIOC_BUTTON).
 */
#define VAL_GPIOCCRL            0xBBBBBBBB      /*  PC7...PC0 */
#define VAL_GPIOCCRH            0x8847BBBB      /* PC15...PC8 */
#define VAL_GPIOCODR            0xFFFFFFFF

/*
 * Port D setup.
 * Everything input with pull-up except:
 * PD0  - Normal input              (GPIOD_OSC_IN).
 * PD1  - Normal input              (GPIOD_OSC_OUT).
 */
#define VAL_GPIODCRL            0x88888844      /*  PD7...PD0 */
#define VAL_GPIODCRH            0x88888888      /* PD15...PD8 */
#define VAL_GPIODODR            0xFFFFFFFF

/*
 * Port E setup.
 * Everything input with pull-up except:
 */
#define VAL_GPIOECRL            0x88888888      /*  PE7...PE0 */
#define VAL_GPIOECRH            0x88888888      /* PE15...PE8 */
#define VAL_GPIOEODR            0xFFFFFFFF

/*
 * USB bus activation macro, required by the USB driver.
 */
#define usb_lld_connect_bus(usbp)

/*
 * USB bus de-activation macro, required by the USB driver.
 */
#define usb_lld_disconnect_bus(usbp)

#if !defined(_FROM_ASM_)
#ifdef __cplusplus
extern "C" {
#endif
  void boardInit(void);
#ifdef __cplusplus
}
#endif
#endif /* _FROM_ASM_ */

#endif /* _BOARD_H_ */

board_ILI9325.h

#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.
#define GDISP_REG              (*((volatile uint16_t *) 0x60000000)) /* RS = 0 */
#define GDISP_RAM              (*((volatile uint16_t *) 0x60020000)) /* RS = 1 */

static inline void init_board(GDisplay *g) {

	(void) 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
		/* FSMC setup for F1 */
		//rccEnableAHB(RCC_AHBENR_FSMCEN, 0);

		/* set pin modes */
		IOBus busC = {GPIOC, (1 << 0) | (1 << 1) | (1 << 4) | (1 << 5) | (1 << 7), 0};
		IOBus busB = {GPIOB, (1 << 8) | (1 << 9) | (1 << 10) | (1 << 11) | (1 << 12) | (1 << 13) | (1 << 14) | (1 << 15), 0};
		palSetBusMode(&busC, PAL_MODE_STM32_ALTERNATE_PUSHPULL);
		palSetBusMode(&busB, PAL_MODE_STM32_ALTERNATE_PUSHPULL);
		//palSetPadMode(GPIOC, GPIOC_TFT_RST, PAL_MODE_OUTPUT_PUSHPULL);
		palSetPadMode(GPIOC, GPIOC_BL_EN, PAL_MODE_OUTPUT_PUSHPULL);

		const unsigned char FSMC_Bank = 0;

		/* FSMC timing */
		FSMC_Bank1->BTCR[FSMC_Bank+1] = (9) | (10 << 7) | (10 << 15);

		/* Bank1 NOR/SRAM control register configuration
		 * This is actually not needed as already set by default after reset */
		FSMC_Bank1->BTCR[FSMC_Bank] = FSMC_BCR1_MWID_0 | FSMC_BCR1_WREN | FSMC_BCR1_MBKEN;
//		break;
//	}
}

static inline void post_init_board(GDisplay *g) {
	(void) g;
}

static inline void setpin_reset(GDisplay *g, bool_t state) {
	(void) g;

}

static inline void set_backlight(GDisplay *g, uint8_t percent) {
	(void) g;
	(void)percent;
}

static inline void acquire_bus(GDisplay *g) {
	(void) g;
}

static inline void release_bus(GDisplay *g) {
	(void) g;
}

static inline void write_index(GDisplay *g, uint16_t index) {
	(void) g;
	GDISP_REG = index;
}

static inline void write_data(GDisplay *g, uint16_t data) {
	(void) g;
	GDISP_RAM = data;
}

static inline void setreadmode(GDisplay *g) {
	(void) g;
}

static inline void setwritemode(GDisplay *g) {
	(void) g;
}

static inline uint16_t read_data(GDisplay *g) {
	(void) g;
	return GDISP_RAM;
}

#endif /* GDISP_LLD_BOARD_H */

Edited February 16, 2015 by Guest

Joel Bodenmann · February 15, 2015

Hello david!

Can you please give us some information about your actual hardware setup? Do you use a well known development board with an e-bay display attached? Is it a custom board?

You mention that you're using GPIOC 0 to 7 and GPIOB 8 to 15. I don't know the pin out of the STM32F1 that you're using but most likely this won't be the FSMC interface of the chip. This would mean that you have to implement your own board file so the data is being put on the right pins. There should be a template file in the drivers directory that you can copy to start.

The board file that you show in your forum post is using the FSMC peripheral.

~ Tectu

inmarket · February 15, 2015

Just one small thing I noticed...

The board file you have listed is the chibios board file. This file should not be altered (usually).

The file you have called "driver_ILI9325" should be called "board_ILI9325".

Joel Bodenmann · February 15, 2015

That's correct but I assume he would get a proper compiler error. But probably we should mention that anyway: Make sure that you don't compile a different board_ILI9325.h accidentally.

~ Tectu

david1982 · February 16, 2015

Sorry my mistake I am using board_ILI9325 I just mislabeled it in the post.

The above board.h file is one I have modified to suit my board I just used the "Olimex STM32-LCD" board file as a base as it compiled/worked with the blinking led example.

Also rccEnableAHB(RCC_AHBENR_FSMCEN, 0); in the driver file causes a error..

'RCC_AHBENR_FSMCEN' undeclared (first use in this function)

Below are some pics and the board schematic.

Images..

https://drive.google.com/file/d/0B_B2fQCYwJRiRkJFdGNLUHcySWs/view?usp=sharing

https://drive.google.com/file/d/0B_B2fQCYwJRibWhkWVRZTEk4eGM/view?usp=sharing

MINI_STM32-V3.0_SCH.pdf.zip

inmarket · February 16, 2015

It looks like from the number of pins connected in the photos that you are using perhaps a SPI interface to talk to the display?

Can you please send the connection diagram between the board and the display, and a copy of your current board_ILI9325.h file.

david1982 · February 16, 2015

The connection diagram is in the zip attachment. The LCD connector is in the bottom left.

And the board_ILI9325.h file that I am using is the second pice of code in my first post (the one I miss labeled).

I did not think SPI required so many data pins?.

Thank you for your help.

Joel Bodenmann · February 16, 2015

@inmarket: Those jumper wires that you can see in the photo are from the programmer / JTAG. The display itself is wired on the PCB to the microcontroller that you can see on the back side of the PCB.

@david: I checked and your display is definitely not connected via FSMC. It is simply bit-banged using GPIO. This is quite typical for those chinese boards. We will try to write up a board file for you this evening.

~ Tectu

Joel Bodenmann · February 16, 2015

We wrote a board file which should be working. However, we had no hardware to actually test it:


/*
 * 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.
#define SET_CS		palSetPad(GPIOC, 8);
#define CLR_CS		palClearPad(GPIOC, 8);
#define SET_RS		palSetPad(GPIOC, 9);
#define CLR_RS		palClearPad(GPIOC, 9);
#define SET_WR		palSetPad(GPIOC, 10);
#define CLR_WR		palClearPad(GPIOC, 10);
#define SET_RD		palSetPad(GPIOC, 11);
#define CLR_RD		palClearPad(GPIOC, 11);

static inline 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:

		// Bus setup
		IOBus busC = {GPIOC, (1<< 0)|(1<< 1)|(1<< 2)|(1<< 3)|(1<< 4)|(1<< 5)|(1<< 6)|(1<< 7), 0};
		IOBus busB = {GPIOB, (1<< 8)|(1<< 9)|(1<<10)|(1<<11)|(1<<12)|(1<<13)|(1<<14)|(1<<15), 0};

		// Pin configuration
		palSetBusMode(&busC, PAL_MODE_OUTPUT_PUSHPULL);			// DB0 - DB7
		palSetBusMode(&busB, PAL_MODE_OUTPUT_PUSHPULL);			// DB8 - DB15
		palSetPadMode(GPIOC,  8, PAL_MODE_OUTPUT_PUSHPULL);		// CS
		palSetPadMode(GPIOC,  9, PAL_MODE_OUTPUT_PUSHPULL);		// RS
		palSetPadMode(GPIOC, 10, PAL_MODE_OUTPUT_PUSHPULL);		// WR
		palSetPadMode(GPIOC, 11, PAL_MODE_OUTPUT_PUSHPULL);		// RD

		// Configure the pins to a well know state
		SET_RS;
		SET_RD;
		SET_WR;
		CLR_CS;

		break;
	}
}

static inline void post_init_board(GDisplay *g)
{
	(void) g;
}

static inline void setpin_reset(GDisplay *g, bool_t state)
{
	(void) g;
	(void) state;

	/* Nothing to do here - Reset pin connected to NRST */
}

static inline void set_backlight(GDisplay *g, uint8_t percent)
{
	(void) g;
	(void) percent;

	/* Implement PWM here - Always 100% for testing purposes */
	palSetPad(GPIOC, 12);
}

static inline void acquire_bus(GDisplay *g)
{
	(void) g;

	CLR_CS;
}

static inline void release_bus(GDisplay *g)
{
	(void) g;

	SET_CS;
}

static inline void write_index(GDisplay *g, uint16_t index)
{
	(void) g;

	palWriteBus(&busC, index & 0x00FF)
	palWriteBus(&busB, index & 0xFF00);
	CLR_RS;
	CLR_WR;
	SET_WR;
	SET_RS;
}

static inline void write_data(GDisplay *g, uint16_t data)
{
	(void) g;

	palWriteBus(&busC, index & 0x00FF)
	palWriteBus(&busB, index & 0xFF00);
	CLR_WR;
	SET_WR;
}

static inline void setreadmode(GDisplay *g)
{
	(void) g;

	// change pin mode to digital input
	palSetBusMode(&busC, PAL_MODE_INPUT);	
	palSetBusMode(&busB, PAL_MODE_INPUT);
	CLR_RD;
}

static inline void setwritemode(GDisplay *g)
{
	(void) g;

	// change pin mode back to digital output
	SET_RD;
	palSetBusMode(&busC, PAL_MODE_OUTPUT_PUSHPULL);	
	palSetBusMode(&busB, PAL_MODE_OUTPUT_PUSHPULL);
}

static inline uint16_t read_data(GDisplay *g) {
	(void) g;

	uint16_t ret;

	ret |= ((uint16_t)palReadBus(&busC) & 0x00FF);
	ret |= ((uint16_t)palReadBus(&busD) & 0xFF00);

	return ret;
}

#if defined(GDISP_USE_DMA)
	#error "GDISP - ILI9325: The GPIO interface does not support DMA"
#endif

#endif /* _GDISP_LLD_BOARD_H */

Can you please test the board file and let us know when you have any problems?

~ Tectu

david1982 · February 16, 2015

Ok I tryed your borad_ILI9325.h and now i get these errors

'busC' undeclared (first use in this function) board_ILI9325.h

'busB' undeclared (first use in this function) board_ILI9325.h

'index' undeclared (first use in this function) board_ILI9325.h

a label can only be part of a statement and a declaration is not a statement board_ILI9325.h line 31

expected expression before 'IOBus' board_ILI9325.h line 32

Joel Bodenmann · February 16, 2015

Sorry, I was on the road and I couldn't try to compile it myself. This one here should now at least compile correctly:

/*
 * 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.
#define SET_CS		palSetPad(GPIOC, 8);
#define CLR_CS		palClearPad(GPIOC, 8);
#define SET_RS		palSetPad(GPIOC, 9);
#define CLR_RS		palClearPad(GPIOC, 9);
#define SET_WR		palSetPad(GPIOC, 10);
#define CLR_WR		palClearPad(GPIOC, 10);
#define SET_RD		palSetPad(GPIOC, 11);
#define CLR_RD		palClearPad(GPIOC, 11);

// The ChibiOS/RT bus groups
IOBus busC;
IOBus busB;

static inline 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:

		// Bus setup
		busC.portid	= GPIOC;
		busC.mask 	= (1<< 0)|(1<< 1)|(1<< 2)|(1<< 3)|(1<< 4)|(1<< 5)|(1<< 6)|(1<< 7);
		busC.offset	= 0;
		busB.portid	= GPIOB;
		busB.mask	= (1<< 8)|(1<< 9)|(1<<10)|(1<<11)|(1<<12)|(1<<13)|(1<<14)|(1<<15);
		busB.offset	= 0;

		// Pin configuration
		palSetBusMode(&busC, PAL_MODE_OUTPUT_PUSHPULL);			// DB0 - DB7
		palSetBusMode(&busB, PAL_MODE_OUTPUT_PUSHPULL);			// DB8 - DB15
		palSetPadMode(GPIOC,  8, PAL_MODE_OUTPUT_PUSHPULL);		// CS
		palSetPadMode(GPIOC,  9, PAL_MODE_OUTPUT_PUSHPULL);		// RS
		palSetPadMode(GPIOC, 10, PAL_MODE_OUTPUT_PUSHPULL);		// WR
		palSetPadMode(GPIOC, 11, PAL_MODE_OUTPUT_PUSHPULL);		// RD

		// Configure the pins to a well know state
		SET_RS;
		SET_RD;
		SET_WR;
		CLR_CS;

		break;
	}
}

static inline void post_init_board(GDisplay *g)
{
	(void) g;
}

static inline void setpin_reset(GDisplay *g, bool_t state)
{
	(void) g;
	(void) state;

	/* Nothing to do here - Reset pin connected to NRST */
}

static inline void set_backlight(GDisplay *g, uint8_t percent)
{
	(void) g;
	(void) percent;

	/* Implement PWM here - Always 100% for testing purposes */
	palSetPad(GPIOC, 12);
}

static inline void acquire_bus(GDisplay *g)
{
	(void) g;

	CLR_CS;
}

static inline void release_bus(GDisplay *g)
{
	(void) g;

	SET_CS;
}

static inline void write_index(GDisplay *g, uint16_t index)
{
	(void) g;

	palWriteBus(&busC, index & 0x00FF);
	palWriteBus(&busB, index & 0xFF00);
	CLR_RS;
	CLR_WR;
	SET_WR;
	SET_RS;
}

static inline void write_data(GDisplay *g, uint16_t data)
{
	(void) g;

	palWriteBus(&busC, data & 0x00FF);
	palWriteBus(&busB, data & 0xFF00);
	CLR_WR;
	SET_WR;
}

static inline void setreadmode(GDisplay *g)
{
	(void) g;

	// change pin mode to digital input
	palSetBusMode(&busC, PAL_MODE_INPUT);	
	palSetBusMode(&busB, PAL_MODE_INPUT);
	CLR_RD;
}

static inline void setwritemode(GDisplay *g)
{
	(void) g;

	// change pin mode back to digital output
	SET_RD;
	palSetBusMode(&busC, PAL_MODE_OUTPUT_PUSHPULL);	
	palSetBusMode(&busB, PAL_MODE_OUTPUT_PUSHPULL);
}

static inline uint16_t read_data(GDisplay *g) {
	(void) g;

	uint16_t ret = 0;

	ret |= ((uint16_t)palReadBus(&busC) & 0x00FF);
	ret |= ((uint16_t)palReadBus(&busB) & 0xFF00);

	return ret;
}

#if defined(GDISP_USE_DMA)
	#error "GDISP - ILI9325: The GPIO interface does not support DMA"
#endif

#endif /* _GDISP_LLD_BOARD_H */

~ Tectu

david1982 · February 17, 2015

Ok,

That compiled with no errors but still no good..

What should my pin configuration be in my board.h file for such a setup?

Joel Bodenmann · February 17, 2015

First thing to check is to make sure that the backlight is actually on. It happens very often that the display is actually working but people can't see it because the backlight is off. Please make sure that the backlight is always set to 100% on in the board file.

If that is not the problem, can you please tell us what you're seeing? Do you see a white screen or noise? Can you verify the signals using an oscilloscope or a logic analyzer?

About the pin configuration: The pin configuration is done inside of the init_board(). This way you don't have to worry about your chibios board file. When you add the backlight, make sure that you also add this pin configuration to the board file.

~ Tectu

david1982 · February 17, 2015

Yes the backlight is working.

White screen with no noise.

So I tested the pins with a scope and pressed reset on each pin test.

DB08 8 /NOTHING

DB09 9 /NOTHING

DB10 10 /NOTHING

DB11 11 /NOTHING

DB12 12 /NOTHING

DB13 13 /NOTHING

DB14 14 /NOTHING

DB15 15 /NOTHING

DB00 0 /NOTHING

DB01 1 /NOTHING

DB02 2 /NOTHING

DB03 3 /NOTHING

DB04 4 /NOTHING

DB05 5 /NOTHING

DB06 6 /NOTHING

DB07 7 /NOTHING

CS 8 /3 PULSE'S ON RESET

RS 9 /NOTHING

WR 10 /3 BURST'S OF PULSE'S

RD 11 /NOTHING

Thanks

inmarket · February 17, 2015

From the looks of this the individual pins are being toggled correctly. It looks like the bus definition however is not working and therefore no data is getting to the display.

Can you please check the chibios bus definition api calls and verify that the code Tectu provided is correct In that area. Unfortunately we can't be experts at everything and the chibios bus definition are not something we regularly use. The chibios forum may also be able to help in this area if you get stuck.

Once the data lines are toggling, if the display still doesn't work then please add another post here.

When doing your testing it would be useful to use a demo that is constantly updating the display. Try using the gdisp/streaming demo as it should keep the display pins very busy.

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