view Discovery/Src/display.c @ 261:cc2406b835ff bm-3

Bugfix: do not reset saturation on surfacing Commit 822416168585 introduced a subtle bug. On surfacing, the value of saturation was reset to 0. This is prefect proof why global data is a dangerous thing, and subtle changes can introduce seemingly unrelated bugs. While it would be much better to factor out as much as possible global data, the fix here does not do that. Simply, the bug is fixed without touching the rather complex gTissue_nitrogen_bar/gTissue_helium_bar handling. Signed-off-by: Jan Mulder <jlmulder@xs4all.nl>
author Jan Mulder <jlmulder@xs4all.nl>
date Tue, 23 Apr 2019 13:05:20 +0200
parents 5f11787b4f42
children 5ca177d2df5d
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#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) */
}


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
}


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);
}


void display_power_off(void)
{
	uint8_t aTxBuffer[1];
	uint8_t bTxBuffer[9];
	uint16_t i,length;

	for(i=0;i<9;i++)
		bTxBuffer[i] = 0;

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

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


void display_sleep(void)
{
	uint8_t aTxBuffer[1];
	uint8_t bTxBuffer[9];
	uint16_t i,length;

	for(i=0;i<9;i++)
		bTxBuffer[i] = 0;

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


void display_sleep_release(void)
{
	uint8_t aTxBuffer[1];
	uint8_t bTxBuffer[9];
	uint16_t i,length;

	for(i=0;i<9;i++)
		bTxBuffer[i] = 0;

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

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