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Re-structure source code
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/* Copyright 2023 Dual Tachyon
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* https://github.com/DualTachyon
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <stdint.h>
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#include <stdio.h> // NULL
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#include "bsp/dp32g030/gpio.h"
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#include "bsp/dp32g030/spi.h"
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#include "driver/gpio.h"
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#include "driver/spi.h"
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#include "driver/st7565.h"
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#include "driver/system.h"
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#include "misc.h"
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uint8_t gStatusLine[LCD_WIDTH];
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uint8_t gFrameBuffer[FRAME_LINES][LCD_WIDTH];
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static void DrawLine(uint8_t column, uint8_t line, const uint8_t * lineBuffer, unsigned size_defVal)
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{
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ST7565_SelectColumnAndLine(column + 4, line);
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GPIO_SetBit(&GPIOB->DATA, GPIOB_PIN_ST7565_A0);
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for (unsigned i = 0; i < size_defVal; i++) {
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while ((SPI0->FIFOST & SPI_FIFOST_TFF_MASK) != SPI_FIFOST_TFF_BITS_NOT_FULL) {}
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SPI0->WDR = lineBuffer ? lineBuffer[i] : size_defVal;
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}
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SPI_WaitForUndocumentedTxFifoStatusBit();
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}
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void ST7565_DrawLine(const unsigned int Column, const unsigned int Line, const uint8_t *pBitmap, const unsigned int Size)
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{
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SPI_ToggleMasterMode(&SPI0->CR, false);
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DrawLine(Column, Line, pBitmap, Size);
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SPI_ToggleMasterMode(&SPI0->CR, true);
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}
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#ifdef ENABLE_FEAT_F4HWN
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// Optimization
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//
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// ST7565_BlitScreen(0) = ST7565_BlitStatusLine()
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// ST7565_BlitScreen(1..7) = ST7565_BlitLine()
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// ST7565_BlitScreen(8) = ST7565_BlitFullScreen()
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//
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static void ST7565_BlitScreen(uint8_t line)
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{
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SPI_ToggleMasterMode(&SPI0->CR, false);
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ST7565_WriteByte(0x40);
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if(line == 0)
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{
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DrawLine(0, 0, gStatusLine, LCD_WIDTH);
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}
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else if(line <= FRAME_LINES)
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{
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DrawLine(0, line, gFrameBuffer[line - 1], LCD_WIDTH);
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}
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else
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{
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for (line = 1; line <= FRAME_LINES; line++) {
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DrawLine(0, line, gFrameBuffer[line - 1], LCD_WIDTH);
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}
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}
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SPI_ToggleMasterMode(&SPI0->CR, true);
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}
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void ST7565_BlitFullScreen(void)
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{
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ST7565_BlitScreen(8);
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}
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void ST7565_BlitLine(unsigned line)
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{
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ST7565_BlitScreen(line + 1);
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}
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void ST7565_BlitStatusLine(void)
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{
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ST7565_BlitScreen(0);
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}
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#else
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void ST7565_BlitFullScreen(void)
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{
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SPI_ToggleMasterMode(&SPI0->CR, false);
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ST7565_WriteByte(0x40);
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for (unsigned line = 0; line < FRAME_LINES; line++) {
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DrawLine(0, line+1, gFrameBuffer[line], LCD_WIDTH);
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}
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SPI_ToggleMasterMode(&SPI0->CR, true);
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}
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void ST7565_BlitLine(unsigned line)
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{
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SPI_ToggleMasterMode(&SPI0->CR, false);
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ST7565_WriteByte(0x40); // start line ?
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DrawLine(0, line+1, gFrameBuffer[line], LCD_WIDTH);
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SPI_ToggleMasterMode(&SPI0->CR, true);
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}
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void ST7565_BlitStatusLine(void)
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{ // the top small text line on the display
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SPI_ToggleMasterMode(&SPI0->CR, false);
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ST7565_WriteByte(0x40); // start line ?
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DrawLine(0, 0, gStatusLine, LCD_WIDTH);
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SPI_ToggleMasterMode(&SPI0->CR, true);
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}
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#endif
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void ST7565_FillScreen(uint8_t value)
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{
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SPI_ToggleMasterMode(&SPI0->CR, false);
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for (unsigned i = 0; i < 8; i++) {
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DrawLine(0, i, NULL, value);
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}
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SPI_ToggleMasterMode(&SPI0->CR, true);
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}
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// Software reset
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const uint8_t ST7565_CMD_SOFTWARE_RESET = 0xE2;
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// Bias Select
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// 1 0 1 0 0 0 1 BS
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// Select bias setting 0=1/9; 1=1/7 (at 1/65 duty)
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const uint8_t ST7565_CMD_BIAS_SELECT = 0xA2;
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// COM Direction
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// 1 1 0 0 MY - - -
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// Set output direction of COM
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// MY=1, reverse direction
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// MY=0, normal direction
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const uint8_t ST7565_CMD_COM_DIRECTION = 0xC0;
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// SEG Direction
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// 1 0 1 0 0 0 0 MX
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// Set scan direction of SEG
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// MX=1, reverse direction
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// MX=0, normal direction
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const uint8_t ST7565_CMD_SEG_DIRECTION = 0xA0;
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// Inverse Display
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// 1 0 1 0 0 1 1 INV
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// INV =1, inverse display
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// INV =0, normal display
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const uint8_t ST7565_CMD_INVERSE_DISPLAY = 0xA6;
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// All Pixel ON
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// 1 0 1 0 0 1 0 AP
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// AP=1, set all pixel ON
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// AP=0, normal display
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const uint8_t ST7565_CMD_ALL_PIXEL_ON = 0xA4;
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// Regulation Ratio
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// 0 0 1 0 0 RR2 RR1 RR0
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// This instruction controls the regulation ratio of the built-in regulator
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const uint8_t ST7565_CMD_REGULATION_RATIO = 0x20;
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// Double command!! Set electronic volume (EV) level
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// Send next: 0 0 EV5 EV4 EV3 EV2 EV1 EV0 contrast 0-63
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const uint8_t ST7565_CMD_SET_EV = 0x81;
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// Control built-in power circuit ON/OFF - 0 0 1 0 1 VB VR VF
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// VB: Built-in Booster
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// VR: Built-in Regulator
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// VF: Built-in Follower
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const uint8_t ST7565_CMD_POWER_CIRCUIT = 0x28;
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// Set display start line 0-63
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// 0 0 0 1 S5 S4 S3 S2 S1 S0
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const uint8_t ST7565_CMD_SET_START_LINE = 0x40;
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// Display ON/OFF
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// 0 0 1 0 1 0 1 1 1 D
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// D=1, display ON
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// D=0, display OFF
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const uint8_t ST7565_CMD_DISPLAY_ON_OFF = 0xAE;
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uint8_t cmds[] = {
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ST7565_CMD_BIAS_SELECT | 0, // Select bias setting: 1/9
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ST7565_CMD_COM_DIRECTION | (0 << 3), // Set output direction of COM: normal
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ST7565_CMD_SEG_DIRECTION | 1, // Set scan direction of SEG: reverse
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ST7565_CMD_INVERSE_DISPLAY | 0, // Inverse Display: false
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ST7565_CMD_ALL_PIXEL_ON | 0, // All Pixel ON: false - normal display
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ST7565_CMD_REGULATION_RATIO | (4 << 0), // Regulation Ratio 5.0
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ST7565_CMD_SET_EV, // Set contrast
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31,
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ST7565_CMD_POWER_CIRCUIT | 0b111, // Built-in power circuit ON/OFF: VB=1 VR=1 VF=1
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ST7565_CMD_SET_START_LINE | 0, // Set Start Line: 0
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ST7565_CMD_DISPLAY_ON_OFF | 1, // Display ON/OFF: ON
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};
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#ifdef ENABLE_FEAT_F4HWN
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static void ST7565_Cmd(uint8_t i)
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{
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switch(i) {
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case 3:
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ST7565_WriteByte(ST7565_CMD_INVERSE_DISPLAY | gSetting_set_inv);
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break;
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case 7:
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ST7565_WriteByte(21 + gSetting_set_ctr);
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break;
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default:
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ST7565_WriteByte(cmds[i]);
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}
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}
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#if defined(ENABLE_FEAT_F4HWN_CTR) || defined(ENABLE_FEAT_F4HWN_INV)
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void ST7565_ContrastAndInv(void)
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{
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SPI_ToggleMasterMode(&SPI0->CR, false);
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ST7565_WriteByte(ST7565_CMD_SOFTWARE_RESET); // software reset
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for(uint8_t i = 0; i < 8; i++)
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{
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ST7565_Cmd(i);
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}
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}
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#endif
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int16_t map(int16_t x, int16_t in_min, int16_t in_max, int16_t out_min, int16_t out_max) {
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return (x - in_min) * (out_max - out_min) / (in_max - in_min) + out_min;
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}
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#if !defined(ENABLE_SPECTRUM) || !defined(ENABLE_FMRADIO)
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void ST7565_Gauge(uint8_t line, uint8_t min, uint8_t max, uint8_t value)
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{
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gFrameBuffer[line][54] = 0x0c;
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gFrameBuffer[line][55] = 0x12;
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gFrameBuffer[line][121] = 0x12;
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gFrameBuffer[line][122] = 0x0c;
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uint8_t filled = map(value, min, max, 56, 120);
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for (uint8_t i = 56; i <= 120; i++) {
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gFrameBuffer[line][i] = (i <= filled) ? 0x2d : 0x21;
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}
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}
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#endif
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#endif
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void ST7565_Init(void)
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{
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SPI0_Init();
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ST7565_HardwareReset();
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SPI_ToggleMasterMode(&SPI0->CR, false);
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ST7565_WriteByte(ST7565_CMD_SOFTWARE_RESET); // software reset
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SYSTEM_DelayMs(120);
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for(uint8_t i = 0; i < 8; i++)
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{
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#ifdef ENABLE_FEAT_F4HWN
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ST7565_Cmd(i);
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#else
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ST7565_WriteByte(cmds[i]);
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#endif
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}
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ST7565_WriteByte(ST7565_CMD_POWER_CIRCUIT | 0b011); // VB=0 VR=1 VF=1
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SYSTEM_DelayMs(1);
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ST7565_WriteByte(ST7565_CMD_POWER_CIRCUIT | 0b110); // VB=1 VR=1 VF=0
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SYSTEM_DelayMs(1);
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for(uint8_t i = 0; i < 4; i++) // why 4 times?
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ST7565_WriteByte(ST7565_CMD_POWER_CIRCUIT | 0b111); // VB=1 VR=1 VF=1
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SYSTEM_DelayMs(40);
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ST7565_WriteByte(ST7565_CMD_SET_START_LINE | 0); // line 0
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ST7565_WriteByte(ST7565_CMD_DISPLAY_ON_OFF | 1); // D=1
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SPI_WaitForUndocumentedTxFifoStatusBit();
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SPI_ToggleMasterMode(&SPI0->CR, true);
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ST7565_FillScreen(0x00);
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}
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#ifdef ENABLE_FEAT_F4HWN_SLEEP
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void ST7565_ShutDown(void)
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{
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SPI_ToggleMasterMode(&SPI0->CR, false);
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ST7565_WriteByte(ST7565_CMD_POWER_CIRCUIT | 0b000); // VB=0 VR=1 VF=1
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ST7565_WriteByte(ST7565_CMD_SET_START_LINE | 0); // line 0
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ST7565_WriteByte(ST7565_CMD_DISPLAY_ON_OFF | 0); // D=1
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SPI_ToggleMasterMode(&SPI0->CR, true);
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}
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#endif
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void ST7565_FixInterfGlitch(void)
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{
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SPI_ToggleMasterMode(&SPI0->CR, false);
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for(uint8_t i = 0; i < ARRAY_SIZE(cmds); i++)
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#ifdef ENABLE_FEAT_F4HWN
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ST7565_Cmd(i);
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#else
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ST7565_WriteByte(cmds[i]);
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#endif
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SPI_WaitForUndocumentedTxFifoStatusBit();
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SPI_ToggleMasterMode(&SPI0->CR, true);
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}
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void ST7565_HardwareReset(void)
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{
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GPIO_SetBit(&GPIOB->DATA, GPIOB_PIN_ST7565_RES);
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SYSTEM_DelayMs(1);
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GPIO_ClearBit(&GPIOB->DATA, GPIOB_PIN_ST7565_RES);
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SYSTEM_DelayMs(20);
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GPIO_SetBit(&GPIOB->DATA, GPIOB_PIN_ST7565_RES);
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SYSTEM_DelayMs(120);
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}
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void ST7565_SelectColumnAndLine(uint8_t Column, uint8_t Line)
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{
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GPIO_ClearBit(&GPIOB->DATA, GPIOB_PIN_ST7565_A0);
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while ((SPI0->FIFOST & SPI_FIFOST_TFF_MASK) != SPI_FIFOST_TFF_BITS_NOT_FULL) {}
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SPI0->WDR = Line + 176;
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while ((SPI0->FIFOST & SPI_FIFOST_TFF_MASK) != SPI_FIFOST_TFF_BITS_NOT_FULL) {}
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SPI0->WDR = ((Column >> 4) & 0x0F) | 0x10;
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while ((SPI0->FIFOST & SPI_FIFOST_TFF_MASK) != SPI_FIFOST_TFF_BITS_NOT_FULL) {}
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SPI0->WDR = ((Column >> 0) & 0x0F);
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SPI_WaitForUndocumentedTxFifoStatusBit();
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}
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void ST7565_WriteByte(uint8_t Value)
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{
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GPIO_ClearBit(&GPIOB->DATA, GPIOB_PIN_ST7565_A0);
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while ((SPI0->FIFOST & SPI_FIFOST_TFF_MASK) != SPI_FIFOST_TFF_BITS_NOT_FULL) {}
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SPI0->WDR = Value;
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}
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