mirror of
https://github.com/jhbruhn/eurorack.git
synced 2025-03-15 02:55:49 +00:00
Try to implement a display driver (but failed). hardware problem? new processor incoming anyways
This commit is contained in:
parent
ae6dee2434
commit
53a833fb33
5 changed files with 298 additions and 39 deletions
176
midi2cv/drivers/display.cc
Normal file
176
midi2cv/drivers/display.cc
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#include "display.h"
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#include "gpio.h"
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#include <stm32f10x_conf.h>
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// SH1106 command definitions
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#define SH1106_CMD_SETMUX (uint8_t)0xA8 // Set multiplex ratio (N, number of lines active on display)
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#define SH1106_CMD_SETOFFS (uint8_t)0xD3 // Set display offset
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#define SH1106_CMD_STARTLINE (uint8_t)0x40 // Set display start line
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#define SH1106_CMD_SEG_NORM (uint8_t)0xA0 // Column 0 is mapped to SEG0 (X coordinate normal)
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#define SH1106_CMD_SEG_INV (uint8_t)0xA1 // Column 127 is mapped to SEG0 (X coordinate inverted)
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#define SH1106_CMD_COM_NORM (uint8_t)0xC0 // Scan from COM0 to COM[N-1] (N - mux ratio, Y coordinate normal)
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#define SH1106_CMD_COM_INV (uint8_t)0xC8 // Scan from COM[N-1] to COM0 (N - mux ratio, Y coordinate inverted)
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#define SH1106_CMD_COM_HW (uint8_t)0xDA // Set COM pins hardware configuration
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#define SH1106_CMD_CONTRAST (uint8_t)0x81 // Contrast control
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#define SH1106_CMD_EDON (uint8_t)0xA5 // Entire display ON enabled (all pixels on, RAM content ignored)
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#define SH1106_CMD_EDOFF (uint8_t)0xA4 // Entire display ON disabled (output follows RAM content)
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#define SH1106_CMD_INV_OFF (uint8_t)0xA6 // Entire display inversion OFF (normal display)
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#define SH1106_CMD_INV_ON (uint8_t)0xA7 // Entire display inversion ON (all pixels inverted)
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#define SH1106_CMD_CLOCKDIV (uint8_t)0xD5 // Set display clock divide ratio/oscillator frequency
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#define SH1106_CMD_DISP_ON (uint8_t)0xAF // Display ON
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#define SH1106_CMD_DISP_OFF (uint8_t)0xAE // Display OFF (sleep mode)
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#define SH1106_CMD_COL_LOW (uint8_t)0x00 // Set Lower Column Address
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#define SH1106_CMD_COL_HIGH (uint8_t)0x10 // Set Higher Column Address
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#define SH1106_CMD_PAGE_ADDR (uint8_t)0xB0 // Set Page Address
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#define SH1106_CMD_CHARGE (uint8_t)0x22 // Dis-charge / Pre-charge Period
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#define SH1106_CMD_SCRL_HR (uint8_t)0x26 // Setup continuous horizontal scroll right
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#define SH1106_CMD_SCRL_HL (uint8_t)0x27 // Setup continuous horizontal scroll left
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#define SH1106_CMD_SCRL_VHR (uint8_t)0x29 // Setup continuous vertical and horizontal scroll right
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#define SH1106_CMD_SCRL_VHL (uint8_t)0x2A // Setup continuous vertical and horizontal scroll left
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#define SH1106_CMD_SCRL_STOP (uint8_t)0x2E // Deactivate scroll
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#define SH1106_CMD_SCRL_ACT (uint8_t)0x2F // Activate scroll
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void Display::Init()
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{
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gpio.Write(GPIO_PIN(SS_OLED), Bit_SET); // deactivate OLED spi
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gpio.Write(GPIO_PIN(RST_OLED), Bit_SET);
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gpio.Write(GPIO_PIN(RST_OLED), Bit_RESET);
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gpio.Write(GPIO_PIN(RST_OLED), Bit_SET);
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GPIO_InitTypeDef gpio_init;
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gpio_init.GPIO_Pin = GPIO_Pin_13 | GPIO_Pin_14 | GPIO_Pin_15;
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gpio_init.GPIO_Mode = GPIO_Mode_AF_PP;
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gpio_init.GPIO_Speed = GPIO_Speed_50MHz;
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GPIO_Init(GPIOB, &gpio_init);
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SPI_InitTypeDef spi_init;
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spi_init.SPI_Direction = SPI_Direction_2Lines_FullDuplex;
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spi_init.SPI_Mode = SPI_Mode_Master;
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spi_init.SPI_DataSize = SPI_DataSize_8b;
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spi_init.SPI_CPOL = SPI_CPOL_Low;
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spi_init.SPI_CPHA = SPI_CPHA_1Edge;
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spi_init.SPI_NSS = SPI_NSS_Soft;
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spi_init.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_8;
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spi_init.SPI_FirstBit = SPI_FirstBit_LSB;
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spi_init.SPI_CRCPolynomial = 10;
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SPI_Init(SPI2, &spi_init);
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SPI_CalculateCRC(SPI2, DISABLE);
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SPI_Cmd(SPI2, ENABLE);
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#define SH1106_cmd_double(x, y) \
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WriteCommand(x); \
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WriteCommand(y);
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#define SH1106_cmd(x) WriteCommand(x);
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// Set multiplex ratio (visible lines)
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SH1106_cmd_double(SH1106_CMD_SETMUX, 0x3F); // 64MUX
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// Set display offset (offset of first line from the top of display)
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SH1106_cmd_double(SH1106_CMD_SETOFFS, 0x00); // Offset: 0
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// Set display start line (first line displayed)
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SH1106_cmd(SH1106_CMD_STARTLINE | 0x00); // Start line: 0
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// Set segment re-map (X coordinate)
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SH1106_cmd(SH1106_CMD_SEG_NORM);
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// Set COM output scan direction (Y coordinate)
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SH1106_cmd(SH1106_CMD_COM_NORM);
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// Set COM pins hardware configuration
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// bit[4]: reset - sequential COM pin configuration
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// set - alternative COM pin configuration (reset value)
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// bit[5]: reset - disable COM left/right remap (reset value)
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// set - enable COM left/right remap
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SH1106_cmd_double(SH1106_CMD_COM_HW, 0x12);
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uint8_t dis_charge = 0x00;
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uint8_t pre_charge = 0x00;
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SH1106_cmd_double(SH1106_CMD_CHARGE, dis_charge | (pre_charge << 4));
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// Set contrast control
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SH1106_cmd_double(SH1106_CMD_CONTRAST, 0x0F); // Contrast: middle level
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SH1106_cmd(0x30);
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// Disable entire display ON
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SH1106_cmd(SH1106_CMD_EDOFF); // Display follows RAM content
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// Disable display inversion
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SH1106_cmd(SH1106_CMD_INV_OFF); // Normal display mode
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// Set clock divide ratio and oscillator frequency
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// bits[3:0] defines the divide ratio of the display clocks (bits[3:0] + 1)
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// bits[7:4] set the oscillator frequency (Fosc), frequency increases with the value of these bits
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// 0xF0 value gives maximum frequency (maximum Fosc without divider)
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// 0x0F value gives minimum frequency (minimum Fosc divided by 16)
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// The higher display frequency decreases image flickering but increases current consumption and vice versa
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SH1106_cmd_double(SH1106_CMD_CLOCKDIV, 0xF0);
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// Display ON
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SH1106_cmd(SH1106_CMD_DISP_ON); // Display enabled
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SH1106_cmd(SH1106_CMD_EDON);
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Clear();
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Update();
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}
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void Display::WriteCommand(uint8_t byte)
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{
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gpio.Write(GPIO_PIN(SDC_OLED), Bit_RESET); // command mode
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gpio.Write(GPIO_PIN(SS_OLED), Bit_RESET); // activate OLED spi
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while (SPI_I2S_GetFlagStatus(SPI2, SPI_I2S_FLAG_BSY) == SET)
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;
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while (SPI_I2S_GetFlagStatus(SPI2, SPI_I2S_FLAG_TXE) == RESET)
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;
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SPI_I2S_SendData(SPI2, byte); // transmit via spi
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gpio.Write(GPIO_PIN(SS_OLED), Bit_SET); // disable oled spi
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}
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void Display::WriteData(uint8_t* buffer, uint8_t size)
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{
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gpio.Write(GPIO_PIN(SDC_OLED), Bit_SET); // data mode
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gpio.Write(GPIO_PIN(SS_OLED), Bit_RESET); // activate OLED spi
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for (int i = 0; i < size; i++) {
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while (SPI_I2S_GetFlagStatus(SPI2, SPI_I2S_FLAG_BSY) == SET)
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;
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while (SPI_I2S_GetFlagStatus(SPI2, SPI_I2S_FLAG_TXE) == RESET)
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;
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SPI_I2S_SendData(SPI2, buffer[i]); // transmit via spi
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for (int i = 0; i < 100; i++)
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;
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}
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gpio.Write(GPIO_PIN(SS_OLED), Bit_SET); // disable oled spi
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}
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void Display::Clear()
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{
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uint32_t i = 0;
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for (i = 0; i < sizeof(buffer); i++)
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buffer[i] = 0x00;
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}
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void Display::Update()
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{
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for (uint32_t i = 0; i < 8; i++) {
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WriteCommand(0xb0 + i);
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WriteCommand(0x00);
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WriteCommand(0x10);
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WriteData(&buffer[128 * i], 128);
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}
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}
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void Display::WritePixel(uint8_t x, uint8_t y, bool color)
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{
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if (x > DISPLAY_WIDTH || y > DISPLAY_HEIGHT)
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return;
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if (color) {
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buffer[x + (y / 8) * DISPLAY_WIDTH] |= 1 << (y % 8);
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} else {
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buffer[x + (y / 8) * DISPLAY_WIDTH] &= ~(1 << (y % 8));
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}
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}
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29
midi2cv/drivers/display.h
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29
midi2cv/drivers/display.h
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#ifndef MIDI2CV_DRIVERS_DISPLAY_H
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#define MIDI2CV_DRIVERS_DISPLAY_H
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#include <stm32f10x_conf.h>
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#include "stmlib/stmlib.h"
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#define DISPLAY_WIDTH 128
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#define DISPLAY_HEIGHT 64
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class Display {
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public:
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Display() { }
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~Display() {}
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void Init();
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void WritePixel(uint8_t x, uint8_t y, bool color);
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void Clear();
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void Update();
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private:
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DISALLOW_COPY_AND_ASSIGN(Display);
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void WriteCommand(uint8_t byte);
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void WriteData(uint8_t* data, uint8_t length);
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uint8_t buffer[DISPLAY_WIDTH*DISPLAY_HEIGHT / 8];
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};
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#endif
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@ -2,10 +2,11 @@
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#include <stm32f10x_conf.h>
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void GPIO::Init() {
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GPIO_InitTypeDef gpio_init;
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gpio_init.GPIO_Pin = PIN_SS_DAC0 | PIN_SS_DAC1 | PIN_RST_USB | PIN_SS_USB | PIN_SS_OLED | PIN_SDC_OLED;
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gpio_init.GPIO_Pin = PIN_RST_OLED | PIN_SS_DAC0 | PIN_SS_DAC1 | PIN_RST_USB | PIN_SS_USB | PIN_SS_OLED | PIN_SDC_OLED;
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gpio_init.GPIO_Speed = GPIO_Speed_50MHz;
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gpio_init.GPIO_Mode = GPIO_Mode_Out_PP;
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GPIO_Init(GPIOB, &gpio_init);
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@ -14,6 +15,11 @@ void GPIO::Init() {
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gpio_init.GPIO_Speed = GPIO_Speed_50MHz;
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gpio_init.GPIO_Mode = GPIO_Mode_Out_PP;
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GPIO_Init(GPIOA, &gpio_init);
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Write(GPIO_PIN(SS_DAC0), Bit_SET);
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Write(GPIO_PIN(SS_DAC1), Bit_SET);
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Write(GPIO_PIN(SS_USB), Bit_SET);
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Write(GPIO_PIN(SS_OLED), Bit_SET);
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}
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void GPIO::Write(GPIO_TypeDef* port, uint16_t pin, bool state) {
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@ -5,6 +5,8 @@
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#include "stmlib/stmlib.h"
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#include <stm32f10x_conf.h>
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#define PORT_RST_OLED GPIOB
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#define PIN_RST_OLED GPIO_Pin_0
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#define PORT_SS_DAC0 GPIOB
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#define PIN_SS_DAC0 GPIO_Pin_6
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#define PORT_SS_DAC1 GPIOB
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@ -44,4 +46,7 @@ class GPIO {
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DISALLOW_COPY_AND_ASSIGN(GPIO);
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};
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extern GPIO gpio;
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#endif
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@ -1,54 +1,97 @@
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#include <stm32f10x_conf.h>
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#include "drivers/display.h"
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#include "drivers/gpio.h"
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using namespace stmlib;
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GPIO gpio;
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Display display;
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// Default interrupt handlers.
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extern "C" {
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void NMI_Handler() {}
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void HardFault_Handler() {
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while (1);
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void HardFault_Handler()
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{
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while (1)
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;
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}
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void MemManage_Handler()
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{
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while (1)
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;
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}
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void BusFault_Handler()
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{
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while (1)
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;
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}
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void UsageFault_Handler()
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{
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while (1)
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;
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}
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void MemManage_Handler() { while (1); }
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void BusFault_Handler() { while (1); }
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void UsageFault_Handler() { while (1); }
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void SVC_Handler() {}
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void DebugMon_Handler() {}
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void PendSV_Handler() {}
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// called every 1ms
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void SysTick_Handler() {
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void SysTick_Handler()
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{
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}
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}
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void Init(void) {
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void Init(void)
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{
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SystemInit();
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NVIC_SetVectorTable(NVIC_VectTab_FLASH, 0x1000);
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RCC_APB2PeriphClockCmd(
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RCC_APB2Periph_GPIOA | RCC_APB2Periph_GPIOB | RCC_APB2Periph_GPIOC |
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RCC_APB2Periph_TIM1 | RCC_APB2Periph_USART1, ENABLE);
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RCC_APB2Periph_GPIOA | RCC_APB2Periph_GPIOB | RCC_APB2Periph_GPIOC | RCC_APB2Periph_TIM1 | RCC_APB2Periph_USART1, ENABLE);
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RCC_APB1PeriphClockCmd(RCC_APB1Periph_SPI2, ENABLE);
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TIM_TimeBaseInitTypeDef timer_init;
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timer_init.TIM_Period = F_CPU / (48000 * 4) - 1;
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timer_init.TIM_Prescaler = 0;
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timer_init.TIM_ClockDivision = TIM_CKD_DIV1;
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timer_init.TIM_CounterMode = TIM_CounterMode_Up;
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timer_init.TIM_RepetitionCounter = 0;
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TIM_InternalClockConfig(TIM1);
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TIM_TimeBaseInit(TIM1, &timer_init);
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TIM_Cmd(TIM1, ENABLE);
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NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2); // 2.2 priority split.
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// DAC interrupt is given highest priority
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NVIC_InitTypeDef timer_interrupt;
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timer_interrupt.NVIC_IRQChannel = TIM1_UP_IRQn;
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timer_interrupt.NVIC_IRQChannelPreemptionPriority = 0;
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timer_interrupt.NVIC_IRQChannelSubPriority = 0;
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timer_interrupt.NVIC_IRQChannelCmd = ENABLE;
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NVIC_Init(&timer_interrupt);
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SysTick_Config(F_CPU / 8000);
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gpio.Init();
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// asm("bkpt #0");
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display.Init();
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}
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int main(void) {
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int main(void)
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{
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Init();
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while (1) {
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for (int x = 0; x < DISPLAY_WIDTH; x++)
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for (int y = 0; y < DISPLAY_HEIGHT; y++) {
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display.WritePixel(x, y, 0xff);
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display.WritePixel(DISPLAY_WIDTH - x, DISPLAY_WIDTH - y, 0xff);
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}
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display.Update();
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// hi
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gpio.Write(GPIO_PIN(GATE_OUT_1), 1);
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gpio.Write(GPIO_PIN(GATE_OUT_1), 0);
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gpio.Write(GPIO_PIN(GATE_OUT_2), 0);
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gpio.Write(GPIO_PIN(GATE_OUT_3), 1);
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gpio.Write(GPIO_PIN(GATE_OUT_3), 0);
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gpio.Write(GPIO_PIN(GATE_OUT_4), 0);
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gpio.Write(GPIO_PIN(GATE_OUT_5), 0);
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gpio.Write(GPIO_PIN(GATE_OUT_6), 0);
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}
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}
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