UA1ZBE Custom Firmware v1.0
Features: - VFO mode with direct frequency input - POCSAG decoder (512/1200 baud) with BCH(31,21) correction - Full-screen Spectrum analyzer - FM Radio receiver - RSSI signal indicator overlay - Custom boot splash (UA1ZBE / POCSAG pager / build date) Architecture: - app/mode.c — mode dispatcher (VFO/POCSAG/Spectrum/FM) - app/boot_splash.c — 2-second boot splash - app/pocsag/ — POCSAG decoder + BCH correction - app/display_rssi.c — RSSI indicator - main.c — entry point with custom init - syscalls.c — bare-metal _sbrk stub Build: arm-none-eabi-gcc -Os -flto -Wall -Werror -Wextra Size: 57.9KB Flash / 3.6KB RAM Controls: - 0-9: Direct frequency input (VFO) - SK2: POCSAG mode - SK1: Spectrum analyzer - 0: FM Radio - EXIT: Return to VFO - F/*: Toggle 512/1200 baud (in POCSAG)
This commit is contained in:
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driver/st7565.c
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214
driver/st7565.c
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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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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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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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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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ST7565_WriteByte(cmds[i]);
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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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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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ST7565_WriteByte(cmds[i]);
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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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