view Discovery/Src/display.c @ 408:2fc08a0d1ec3 Improment_NVM

Bugfix invalid voltage / temperatur after coldstart: In case of a cold start (complete power on / off) the RTE could send devie data before values like voltage or temperature have been measured for the first time. As result the device history data was set to it limits causing a minimal voltage of 2V to be displayed in history memory. Workaround for voltage is to initialize it to 6V at startup but for temperature a default value having no impact to the history memory is not possible
author ideenmodellierer
date Sun, 12 Jan 2020 19:50:14 +0100
parents 5ca177d2df5d
children f7318457df4d
line wrap: on
line source


#include "stm32f4xx_hal.h" /* for HAL_Delay() */
#include "ostc.h"
#include "display.h"

#define ENABLE_EXTENDED_COMMANDS	0xB9
#define SET_POWER									0xB1
#define SLEEP_OUT									0x11
#define DISPLAY_INVERSION_OFF			0x20
#define MEMORY_ACCESS_ONTROL			0x36
#define INTERFACE_PIXEL_FORMAT		0x3A
#define SET_RGB_INTERFACE_RELATED	0xB3
#define SET_DISPLAY_WAVEFORM			0xB4
#define SET_PANEL									0xCC
#define SET_GAMMA_CURVE_RELATED		0xE0
#define DISPLAY_ON								0x29
#define DISPLAY_OFF								0x28
#define SLEEP_IN									0x10


static void Display_Error_Handler(void);

void display_power_on__1_of_2__pre_RGB(void)
{
	/* reset system */ 
	HAL_GPIO_WritePin(DISPLAY_CSB_GPIO_PORT,DISPLAY_CSB_PIN,GPIO_PIN_SET); // chip select

	HAL_GPIO_WritePin(DISPLAY_RESETB_GPIO_PORT,DISPLAY_RESETB_PIN,GPIO_PIN_RESET);
	HAL_Delay(10);
	HAL_GPIO_WritePin(DISPLAY_RESETB_GPIO_PORT,DISPLAY_RESETB_PIN,GPIO_PIN_SET);
	HAL_Delay(10);

	/* RGB signals should be now for 2 frames or more (datasheet) */
}


static void send(uint8_t *pData, uint16_t inputlength)
{
	HAL_GPIO_WritePin(DISPLAY_CSB_GPIO_PORT,DISPLAY_CSB_PIN,GPIO_PIN_RESET); // chip select

	if(HAL_SPI_Transmit(&hspiDisplay,(uint8_t*)pData, inputlength, 10000) != HAL_OK)
		Display_Error_Handler();

	while (HAL_SPI_GetState(&hspiDisplay) != HAL_SPI_STATE_READY)
  {
  }
	HAL_GPIO_WritePin(DISPLAY_CSB_GPIO_PORT,DISPLAY_CSB_PIN,GPIO_PIN_SET); // chip select
}


static uint16_t convert8to9to8(uint8_t *pInput, uint8_t *pOutput,uint16_t inputlength)
{
	uint16_t outputlength;
	uint8_t readbit =  0x80;//0b1000000;
	uint8_t writebit = 0x40;//0b0100000;
	uint16_t i,j,k;

	outputlength = ((inputlength+7)/8)*9;

	for(i=0;i<outputlength;i++)
		pOutput[i] = 0;

	k = 0;
	for(i=0;i<inputlength;i++)
	{
		if(i != 0)
		{
			pOutput[k] |= writebit; // 9. bit
			writebit = writebit >> 1;
			if(writebit == 0)
			{
				writebit = 0x80;
				k++;
			}
		}
		for(j=0;j<8;j++)
		{
			if((pInput[i] & readbit) != 0)
			{
				pOutput[k] |= writebit;
			}
			readbit = readbit >> 1;
			if(readbit == 0)
				readbit = 0x80;
			writebit = writebit >> 1;
			if(writebit == 0)
			{
				writebit = 0x80;
				k++;
			}
		}
	}
	return outputlength;
}

void display_power_on__2_of_2__post_RGB(void)
{
	uint8_t aTxBuffer[32];
	uint8_t bTxBuffer[36];
	uint16_t i,length;

	for(i=0;i<32;i++)
		aTxBuffer[i] = 0;
	for(i=0;i<36;i++)
		bTxBuffer[i] = 0;

	aTxBuffer[0] = ENABLE_EXTENDED_COMMANDS;
	aTxBuffer[1] = 0xFF;
	aTxBuffer[2] = 0x83;
	aTxBuffer[3] = 0x63;
	length = convert8to9to8((uint8_t*)aTxBuffer,(uint8_t*)bTxBuffer,4);
	send((uint8_t*)bTxBuffer, length);

	aTxBuffer[0] = SET_POWER;
	aTxBuffer[1] = 0x81;
	aTxBuffer[2] = 0x24;
	aTxBuffer[3] = 0x04;
	aTxBuffer[4] = 0x02;
	aTxBuffer[5] = 0x02;
	aTxBuffer[6] = 0x03;
	aTxBuffer[7] = 0x10;
	aTxBuffer[8] = 0x10;
	aTxBuffer[9] = 0x34;
	aTxBuffer[10] = 0x3C;
	aTxBuffer[11] = 0x3F;
	aTxBuffer[12] = 0x3F;
	length = convert8to9to8((uint8_t*)aTxBuffer,(uint8_t*)bTxBuffer,13);
	send((uint8_t*)bTxBuffer, length);

	aTxBuffer[0] = SLEEP_OUT;
	length = convert8to9to8((uint8_t*)aTxBuffer,(uint8_t*)bTxBuffer,1);
	send((uint8_t*)bTxBuffer, length);
	HAL_Delay(5+1);

	aTxBuffer[0] = DISPLAY_INVERSION_OFF;
	length = convert8to9to8((uint8_t*)aTxBuffer,(uint8_t*)bTxBuffer,1);
	send((uint8_t*)bTxBuffer, length);

	aTxBuffer[0] = MEMORY_ACCESS_ONTROL;
	aTxBuffer[1] = 0x00;
	length = convert8to9to8((uint8_t*)aTxBuffer,(uint8_t*)bTxBuffer,2);
	send((uint8_t*)bTxBuffer, length);

	aTxBuffer[0] = INTERFACE_PIXEL_FORMAT;
	aTxBuffer[1] = 0x70;
	length = convert8to9to8((uint8_t*)aTxBuffer,(uint8_t*)bTxBuffer,2);
	send((uint8_t*)bTxBuffer, length);
	HAL_Delay(120+20);

	aTxBuffer[0] = SET_POWER;
	aTxBuffer[1] = 0x78;
	aTxBuffer[2] = 0x24;
	aTxBuffer[3] = 0x04,
	aTxBuffer[4] = 0x02;
	aTxBuffer[5] = 0x02;
	aTxBuffer[6] = 0x03;
	aTxBuffer[7] = 0x10;
	aTxBuffer[8] = 0x10;
	aTxBuffer[9] = 0x34;
	aTxBuffer[10] = 0x3C;
	aTxBuffer[11] = 0x3F;
	aTxBuffer[12] = 0x3F;
	length = convert8to9to8((uint8_t*)aTxBuffer,(uint8_t*)bTxBuffer,13);
	send((uint8_t*)bTxBuffer, length);

	aTxBuffer[0] = SET_RGB_INTERFACE_RELATED;
	aTxBuffer[1] = 0x01;
	length = convert8to9to8((uint8_t*)aTxBuffer,(uint8_t*)bTxBuffer,2);
	send((uint8_t*)bTxBuffer, length);

	aTxBuffer[0] = SET_DISPLAY_WAVEFORM;
	aTxBuffer[1] = 0x00;
	aTxBuffer[2] = 0x08;
	aTxBuffer[3] = 0x56;
	aTxBuffer[4] = 0x07;
	aTxBuffer[5] = 0x01;
	aTxBuffer[6] = 0x01;
	aTxBuffer[7] = 0x4D;
	aTxBuffer[8] = 0x01;
	aTxBuffer[9] = 0x42;
	length = convert8to9to8((uint8_t*)aTxBuffer,(uint8_t*)bTxBuffer,10);
	send((uint8_t*)bTxBuffer, length);

	aTxBuffer[0] = SET_PANEL;
	aTxBuffer[1] = 0x0B;
	length = convert8to9to8((uint8_t*)aTxBuffer,(uint8_t*)bTxBuffer,2);
	send((uint8_t*)bTxBuffer, length);

	aTxBuffer[0] = SET_GAMMA_CURVE_RELATED;
	aTxBuffer[1] = 0x01;
	aTxBuffer[2] = 0x48;
	aTxBuffer[3] = 0x4D;
	aTxBuffer[4] = 0x4E;
	aTxBuffer[5] = 0x58;
	aTxBuffer[6] = 0xF6;
	aTxBuffer[7] = 0x0B;
	aTxBuffer[8] = 0x4E;
	aTxBuffer[9] = 0x12;
	aTxBuffer[10] = 0xD5;
	aTxBuffer[11] = 0x15;
	aTxBuffer[12] = 0x95;
	aTxBuffer[13] = 0x55;
	aTxBuffer[14] = 0x8E;
	aTxBuffer[15] = 0x11;
	aTxBuffer[16] = 0x01;
	aTxBuffer[17] = 0x48;
	aTxBuffer[18] = 0x4D;
	aTxBuffer[19] = 0x55;
	aTxBuffer[20] = 0x5F;
	aTxBuffer[21] = 0xFD;
	aTxBuffer[22] = 0x0A;
	aTxBuffer[23] = 0x4E;
	aTxBuffer[24] = 0x51;
	aTxBuffer[25] = 0xD3;
	aTxBuffer[26] = 0x17;
	aTxBuffer[27] = 0x95;
	aTxBuffer[28] = 0x96;
	aTxBuffer[29] = 0x4E;
	aTxBuffer[30] = 0x11;
	length = convert8to9to8((uint8_t*)aTxBuffer,(uint8_t*)bTxBuffer,31);
	send((uint8_t*)bTxBuffer, length);
	HAL_Delay(5+1);

	aTxBuffer[0] = DISPLAY_ON;
	length = convert8to9to8((uint8_t*)aTxBuffer,(uint8_t*)bTxBuffer,1);
	send((uint8_t*)bTxBuffer, length);
}


static void Display_Error_Handler(void)
{
  while(1)
  {
  }
}