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DisplayTest: controller fine tuning. Disable u8g2 contrast management. (#772)

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* DisplayTest: controller fine tuning. Disable u8g2 contrast management.
* DisplayTest: correct initial configuration values. Targets: cleanup dead code.
* DisplayTest: correct initial value for bias.
This commit is contained in:
あく
2021-10-19 14:42:49 +03:00
committed by GitHub
parent bde3a47078
commit 4997b56498
7 changed files with 205 additions and 50 deletions
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109
lib/u8g2/u8g2_glue.c
View File

@@ -57,23 +57,42 @@ uint8_t u8x8_hw_spi_stm32(u8x8_t* u8x8, uint8_t msg, uint8_t arg_int, void* arg_
return 1;
}
static const uint8_t u8x8_d_st7565_powersave0_seq[] = {
U8X8_START_TRANSFER(), /* enable chip, delay is part of the transfer start */
U8X8_C(0x0a4), /* all pixel off, issue 142 */
U8X8_C(0x0af), /* display on */
U8X8_END_TRANSFER(), /* disable chip */
U8X8_END() /* end of sequence */
#define ST756X_CMD_ON_OFF 0b10101110 /**< 0:0 Switch Display ON/OFF: last bit */
#define ST756X_CMD_SET_LINE 0b01000000 /**< 0:0 Set Start Line: last 6 bits */
#define ST756X_CMD_SET_PAGE 0b10110000 /**< 0:0 Set Page address: last 4 bits */
#define ST756X_CMD_SET_COLUMN_MSB 0b00010000 /**< 0:0 Set Column MSB: last 4 bits */
#define ST756X_CMD_SET_COLUMN_LSB 0b00000000 /**< 0:0 Set Column LSB: last 4 bits */
#define ST756X_CMD_SEG_DIRECTION 0b10100000 /**< 0:0 Reverse scan direction of SEG: last bit */
#define ST756X_CMD_INVERSE_DISPLAY 0b10100110 /**< 0:0 Invert display: last bit */
#define ST756X_CMD_ALL_PIXEL_ON 0b10100100 /**< 0:0 Set all pixel on: last bit */
#define ST756X_CMD_BIAS_SELECT 0b10100010 /**< 0:0 Select 1/9(0) or 1/7(1) bias: last bit */
#define ST756X_CMD_R_M_W 0b11100000 /**< 0:0 Enter Read Modify Write mode: read+0, write+1 */
#define ST756X_CMD_END 0b11101110 /**< 0:0 Exit Read Modify Write mode */
#define ST756X_CMD_RESET 0b11100010 /**< 0:0 Software Reset */
#define ST756X_CMD_COM_DIRECTION 0b11000000 /**< 0:0 Com direction reverse: +0b1000 */
#define ST756X_CMD_POWER_CONTROL 0b00101000 /**< 0:0 Power control: last 3 bits VB:VR:VF */
#define ST756X_CMD_REGULATION_RATIO 0b00100000 /**< 0:0 Regulation resistor ration: last 3bits */
#define ST756X_CMD_SET_EV 0b10000001 /**< 0:0 Set electronic volume: 5 bits in next byte */
#define ST756X_CMD_SET_BOOSTER 0b11111000 /**< 0:0 Set Booster level, 4X(0) or 5X(1): last bit in next byte */
#define ST756X_CMD_NOP 0b11100011 /**< 0:0 No operation */
static const uint8_t u8x8_d_st756x_powersave0_seq[] = {
U8X8_START_TRANSFER(), /* enable chip, delay is part of the transfer start */
U8X8_C(ST756X_CMD_ALL_PIXEL_ON | 0b0), /* all pixel off */
U8X8_C(ST756X_CMD_ON_OFF | 0b1), /* display on */
U8X8_END_TRANSFER(), /* disable chip */
U8X8_END() /* end of sequence */
};
static const uint8_t u8x8_d_st7565_powersave1_seq[] = {
U8X8_START_TRANSFER(), /* enable chip, delay is part of the transfer start */
U8X8_C(0x0ae), /* display off */
U8X8_C(0x0a5), /* enter powersafe: all pixel on, issue 142 */
U8X8_END_TRANSFER(), /* disable chip */
U8X8_END() /* end of sequence */
static const uint8_t u8x8_d_st756x_powersave1_seq[] = {
U8X8_START_TRANSFER(), /* enable chip, delay is part of the transfer start */
U8X8_C(ST756X_CMD_ON_OFF | 0b0), /* display off */
U8X8_C(ST756X_CMD_ALL_PIXEL_ON | 0b1), /* all pixel on */
U8X8_END_TRANSFER(), /* disable chip */
U8X8_END() /* end of sequence */
};
static const uint8_t u8x8_d_st7565_flip0_seq[] = {
static const uint8_t u8x8_d_st756x_flip0_seq[] = {
U8X8_START_TRANSFER(), /* enable chip, delay is part of the transfer start */
U8X8_C(0x0a1), /* segment remap a0/a1*/
U8X8_C(0x0c0), /* c0: scan dir normal, c8: reverse */
@@ -81,7 +100,7 @@ static const uint8_t u8x8_d_st7565_flip0_seq[] = {
U8X8_END() /* end of sequence */
};
static const uint8_t u8x8_d_st7565_flip1_seq[] = {
static const uint8_t u8x8_d_st756x_flip1_seq[] = {
U8X8_START_TRANSFER(), /* enable chip, delay is part of the transfer start */
U8X8_C(0x0a0), /* segment remap a0/a1*/
U8X8_C(0x0c8), /* c0: scan dir normal, c8: reverse */
@@ -111,7 +130,7 @@ static const u8x8_display_info_t u8x8_st756x_128x64_display_info = {
.pixel_height = 64
};
uint8_t u8x8_d_st7565_common(u8x8_t *u8x8, uint8_t msg, uint8_t arg_int, void *arg_ptr) {
uint8_t u8x8_d_st756x_common(u8x8_t *u8x8, uint8_t msg, uint8_t arg_int, void *arg_ptr) {
uint8_t x, c;
uint8_t *ptr;
@@ -148,14 +167,14 @@ uint8_t u8x8_d_st7565_common(u8x8_t *u8x8, uint8_t msg, uint8_t arg_int, void *a
break;
case U8X8_MSG_DISPLAY_SET_POWER_SAVE:
if ( arg_int == 0 )
u8x8_cad_SendSequence(u8x8, u8x8_d_st7565_powersave0_seq);
u8x8_cad_SendSequence(u8x8, u8x8_d_st756x_powersave0_seq);
else
u8x8_cad_SendSequence(u8x8, u8x8_d_st7565_powersave1_seq);
u8x8_cad_SendSequence(u8x8, u8x8_d_st756x_powersave1_seq);
break;
#ifdef U8X8_WITH_SET_CONTRAST
case U8X8_MSG_DISPLAY_SET_CONTRAST:
u8x8_cad_StartTransfer(u8x8);
u8x8_cad_SendCmd(u8x8, 0x081 );
u8x8_cad_SendCmd(u8x8, ST756X_CMD_SET_EV);
u8x8_cad_SendArg(u8x8, arg_int >> 2 ); /* st7565 has range from 0 to 63 */
u8x8_cad_EndTransfer(u8x8);
break;
@@ -166,27 +185,33 @@ uint8_t u8x8_d_st7565_common(u8x8_t *u8x8, uint8_t msg, uint8_t arg_int, void *a
return 1;
}
static const uint8_t u8x8_d_st756x_erc_init_seq[] = {
U8X8_START_TRANSFER(),
U8X8_C(0x0e2), // soft reset
U8X8_C(0xA3), // CMD_SET_BIAS_7
U8X8_C(0xA0), // CMD_SET_ADC_NORMAL
U8X8_C(0xC8), // CMD_SET_COM_REVERSE
U8X8_C(0x40), // CMD_SET_DISP_START_LINE
U8X8_C(0x28 | 0x4), // CMD_SET_POWER_CONTROL | 0x4
U8X8_DLY(50),
U8X8_C(0x28 | 0x6), // CMD_SET_POWER_CONTROL | 0x6
U8X8_DLY(50),
U8X8_C(0x28 | 0x7), // CMD_SET_POWER_CONTROL | 0x7
U8X8_DLY(50),
U8X8_C(0x20 | 0x6), // CMD_SET_RESISTOR_RATIO | 0x6
U8X8_END_TRANSFER(),
U8X8_END() // end of sequence
};
void u8x8_d_st756x_erc_init(u8x8_t *u8x8, uint8_t contrast, uint8_t regulation_ratio, bool bias) {
contrast = contrast & 0b00111111;
regulation_ratio = regulation_ratio & 0b111;
u8x8_cad_StartTransfer(u8x8);
// Reset
u8x8_cad_SendCmd(u8x8, ST756X_CMD_RESET);
// Bias: 1/7(0b1) or 1/9(0b0)
u8x8_cad_SendCmd(u8x8, ST756X_CMD_BIAS_SELECT | bias);
// Page, Line and Segment config
u8x8_cad_SendCmd(u8x8, ST756X_CMD_SEG_DIRECTION);
u8x8_cad_SendCmd(u8x8, ST756X_CMD_COM_DIRECTION | 0b1000);
u8x8_cad_SendCmd(u8x8, ST756X_CMD_SET_LINE);
// Set Regulation Ratio
u8x8_cad_SendCmd(u8x8, ST756X_CMD_REGULATION_RATIO | regulation_ratio);
// Set EV
u8x8_cad_SendCmd(u8x8, ST756X_CMD_SET_EV);
u8x8_cad_SendArg(u8x8, contrast);
// Enable power
u8x8_cad_SendCmd(u8x8, ST756X_CMD_POWER_CONTROL | 0b111);
u8x8_cad_EndTransfer(u8x8);
}
uint8_t u8x8_d_st756x_erc(u8x8_t *u8x8, uint8_t msg, uint8_t arg_int, void *arg_ptr) {
/* call common procedure first and handle messages there */
if (u8x8_d_st7565_common(u8x8, msg, arg_int, arg_ptr) == 0) {
if (u8x8_d_st756x_common(u8x8, msg, arg_int, arg_ptr) == 0) {
/* msg not handled, then try here */
switch(msg){
case U8X8_MSG_DISPLAY_SETUP_MEMORY:
@@ -194,14 +219,20 @@ uint8_t u8x8_d_st756x_erc(u8x8_t *u8x8, uint8_t msg, uint8_t arg_int, void *arg_
break;
case U8X8_MSG_DISPLAY_INIT:
u8x8_d_helper_display_init(u8x8);
u8x8_cad_SendSequence(u8x8, u8x8_d_st756x_erc_init_seq);
/* Bias, EV and Regulation Ration
* EV = 32
* RR = V0 / ((1 - (63 - EV) / 162) * 2.1)
* RR = 10 / ((1 - (63 - 32) / 162) * 2.1) ~= 5.88 is 5.5 (0b101)
* Bias = 1/9 (false)
*/
u8x8_d_st756x_erc_init(u8x8, 32, 0b101, false);
break;
case U8X8_MSG_DISPLAY_SET_FLIP_MODE:
if ( arg_int == 0 ) {
u8x8_cad_SendSequence(u8x8, u8x8_d_st7565_flip1_seq);
u8x8_cad_SendSequence(u8x8, u8x8_d_st756x_flip1_seq);
u8x8->x_offset = u8x8->display_info->default_x_offset;
} else {
u8x8_cad_SendSequence(u8x8, u8x8_d_st7565_flip0_seq);
u8x8_cad_SendSequence(u8x8, u8x8_d_st756x_flip0_seq);
u8x8->x_offset = u8x8->display_info->flipmode_x_offset;
}
break;

3
lib/u8g2/u8g2_glue.h
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@@ -1,9 +1,12 @@
#pragma once
#include "u8g2.h"
#include <stdbool.h>
uint8_t u8g2_gpio_and_delay_stm32(u8x8_t* u8x8, uint8_t msg, uint8_t arg_int, void* arg_ptr);
uint8_t u8x8_hw_spi_stm32(u8x8_t* u8x8, uint8_t msg, uint8_t arg_int, void* arg_ptr);
void u8g2_Setup_st756x_erc(u8g2_t *u8g2, const u8g2_cb_t *rotation, u8x8_msg_cb byte_cb, u8x8_msg_cb gpio_and_delay_cb);
void u8x8_d_st756x_erc_init(u8x8_t *u8x8, uint8_t contrast, uint8_t regulation_ratio, bool bias);

2
lib/u8g2/u8x8.h
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@@ -89,7 +89,7 @@
/* Global Defines */
/* Undefine this to remove u8x8_SetContrast function */
#define U8X8_WITH_SET_CONTRAST
// #define U8X8_WITH_SET_CONTRAST
/* Define this for an additional user pointer inside the u8x8 data struct */
//#define U8X8_WITH_USER_PTR