ili9163 spi LCD Help Please!

monta · ‎2015-02-17

Posted on February 17, 2015 at 12:00

Hi guys , I wrote this simple code based on the ili9163 documentation and what what i found online of the arduino library writen for the same display , yet all what i was able to do is get the Background LED to light up the panel , nothing diplaying apart from that , here is my code:

#include <stm32f4xx.h>

#include <stm32f4xx_adc.h>

#include <stm32f4xx_gpio.h>

#include <stm32f4xx_rcc.h>

#include <stm32f4xx_spi.h>

#define CSPin GPIO_Pin_1

#define ResPin GPIO_Pin_2

#define AOPin GPIO_Pin_4

#define DatPin GPIO_Pin_5

#define ClkPin GPIO_Pin_3

#define VCCPin GPIO_Pin_6

#define BLPin GPIO_Pin_7

#define DatPS GPIO_PinSource5

#define ClkPS GPIO_PinSource3

#define Red 0x8000

GPIO_InitTypeDef GP_InitDef;

SPI_InitTypeDef SPI_InitDef;

void initGPIO(){

RCC->AHB1ENR |= RCC_AHB1Periph_GPIOB; // Clock enable for GPIOB.

GP_InitDef.GPIO_Pin = CSPin | ResPin | AOPin | BLPin | VCCPin;

GP_InitDef.GPIO_Mode = GPIO_Mode_OUT;

GP_InitDef.GPIO_OType = GPIO_OType_PP;

GP_InitDef.GPIO_PuPd = GPIO_PuPd_NOPULL;

GP_InitDef.GPIO_Speed = GPIO_Speed_25MHz;

GPIO_Init(GPIOB, &GP_InitDef);

GP_InitDef.GPIO_Pin = DatPin | ClkPin;

GP_InitDef.GPIO_Mode = GPIO_Mode_AF;

GPIO_Init(GPIOB, &GP_InitDef);

GPIO_PinAFConfig(GPIOB, ClkPS, GPIO_AF_SPI3);

GPIO_PinAFConfig(GPIOB, DatPS, GPIO_AF_SPI3);

}

void initSPI3() {

// Initialize SPI3.

SPI_InitDef.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_2;

SPI_InitDef.SPI_CPHA = SPI_CPHA_1Edge;

SPI_InitDef.SPI_CPOL = SPI_CPOL_Low;

SPI_InitDef.SPI_DataSize = SPI_DataSize_8b;

SPI_InitDef.SPI_FirstBit = SPI_FirstBit_MSB;

SPI_InitDef.SPI_Mode = SPI_Mode_Master;

SPI_InitDef.SPI_NSS = SPI_NSS_Soft;

SPI_Init(SPI3, &SPI_InitDef);

SPI_Cmd(SPI3, ENABLE);

}

void writeCommand(uint16_t command){

GPIO_ResetBits(GPIOB, AOPin); // Set A0 D/C pin LOW for command select.

SPI_I2S_SendData(SPI3, command);

while(SPI_I2S_GetFlagStatus(SPI3, SPI_I2S_FLAG_BSY) == SET);

}

void writeData(uint16_t data){

GPIO_SetBits(GPIOB, AOPin); // Set A0 D/C pin LOW for data select.

SPI_I2S_SendData(SPI3, data);

while(SPI_I2S_GetFlagStatus(SPI3, SPI_I2S_FLAG_BSY) == SET);

}

void writeData16(uint16_t data){

GPIO_SetBits(GPIOB, AOPin); // Set A0 D/C pin LOW for data select.

SPI_I2S_SendData(SPI3, data>>8);

while(SPI_I2S_GetFlagStatus(SPI3, SPI_I2S_FLAG_BSY) == SET);

SPI_I2S_SendData(SPI3, data);

while(SPI_I2S_GetFlagStatus(SPI3, SPI_I2S_FLAG_BSY) == SET);

}

void setCoordinates(){

writeCommand(0x2A);

writeData(0x00);

writeData(05);

writeData(0x00);

writeData(50);

writeCommand(0x2B);

writeData(0x00);

writeData(32);

writeData(0x00);

writeData(32+50);

writeCommand(0x2C);

}

int main(void)

{

int index;

initGPIO();

initSPI3();

GPIO_SetBits(GPIOB, BLPin); // Set The background LED Pin high.

//

GPIO_ResetBits(GPIOB, ResPin);

for (index = 0; index < 50000; index++);

GPIO_SetBits(GPIOB, ResPin);

for (index = 0; index < 50000; index++);

GPIO_ResetBits(GPIOB, CSPin);

for (index = 0; index < 50000; index++);

//Start The LCD initializing.

writeCommand(0x01); //Software reset

for (index = 0; index < 50000; index++);

writeCommand(0x11); // Exit Sleep

for (index = 0; index < 10000; index++);

writeCommand(0x26); //Set default gamma

writeData(0x04);