135 lines
3.7 KiB
C
135 lines
3.7 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include "driver/i2c.h"
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#include "esp_log.h"
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#include "codetab.h"
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#define Brightness 0xCF
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#define X_WIDTH 128
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#define Y_WIDTH 64
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#define I2C_ADDRESS 0x78
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#define I2C_MASTER_TX_BUF_DISABLE 0 /*!< I2C master doesn't need buffer */
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#define I2C_MASTER_RX_BUF_DISABLE 0 /*!< I2C master doesn't need buffer */
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#define I2C_MASTER_SDA_IO 9
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#define I2C_MASTER_SCL_IO 10
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#define I2C_MASTER_FREQ_HZ 400000 /*!< I2C master clock frequency */
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#define I2C_MASTER_NUM I2C_NUM_0
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void initI2c()
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{
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int i2c_master_port = I2C_MASTER_NUM;
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i2c_config_t conf = {
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.mode = I2C_MODE_MASTER,
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.sda_io_num = I2C_MASTER_SDA_IO,
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.scl_io_num = I2C_MASTER_SCL_IO,
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.sda_pullup_en = GPIO_PULLUP_ENABLE,
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.scl_pullup_en = GPIO_PULLUP_ENABLE,
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.master.clk_speed = I2C_MASTER_FREQ_HZ,
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};
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i2c_param_config(i2c_master_port, &conf);
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ESP_LOGI("I2C", "Enabling I2C");
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ESP_ERROR_CHECK(i2c_driver_install(i2c_master_port, conf.mode, I2C_MASTER_RX_BUF_DISABLE, I2C_MASTER_TX_BUF_DISABLE, 0));
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ESP_LOGI("SCR", "I2C initialized successfully");
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}
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void i2cWriteByte(uint8_t reg, uint8_t data)
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{
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i2c_cmd_handle_t cmd = i2c_cmd_link_create();
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i2c_master_start(cmd);
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i2c_master_write_byte(cmd, I2C_ADDRESS | I2C_MASTER_WRITE, true);
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i2c_master_write_byte(cmd, reg, true);
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i2c_master_write_byte(cmd, data, true);
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i2c_master_stop(cmd);
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i2c_master_cmd_begin(I2C_MASTER_NUM, cmd, 1000 / portTICK_PERIOD_MS);
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i2c_cmd_link_delete(cmd);
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}
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void i2cWriteCommand(uint8_t data)
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{
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i2cWriteByte(0x00, data);
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}
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void i2cWriteData(uint8_t data)
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{
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i2cWriteByte(0x40, data);
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}
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void display_fill(uint8_t bmpData)
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{
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for (int y = 0; y < 8; y++)
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{
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i2cWriteCommand(0xB0 + y);
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i2cWriteCommand(0x01);
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i2cWriteCommand(0x10);
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for (int x = 0; x < X_WIDTH; x++)
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{
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i2cWriteData(bmpData);
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}
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}
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}
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void display_set_pos(uint8_t x, uint8_t y)
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{
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i2cWriteCommand(0xB0 + y);
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i2cWriteCommand(((x & 0xF0) >> 4) | 0x10);
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i2cWriteCommand((x & 0x0F) | 0x01);
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}
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void display_print8_str(uint8_t x, uint8_t y, char str[])
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{
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uint8_t c;
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for (uint8_t ch, ci = 0; ch = str[ci], ch != '\0'; ci++, x += 8)
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{
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c = ch - 0x20;
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display_set_pos(x, y);
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for(uint8_t cx = 0; cx < 8; cx++)
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{
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i2cWriteData(F8X16[c*16+cx]);
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}
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display_set_pos(x, y + 1);
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for (uint8_t cx = 0; cx < 8; cx++)
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{
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i2cWriteData(F8X16[c * 16 + cx + 8]);
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}
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;
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}
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}
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void initDisplay()
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{
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initI2c();
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i2cWriteCommand(0xAE); // display off
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i2cWriteCommand(0x00); // set lower column address
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i2cWriteCommand(0x10); // set higher column address
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i2cWriteCommand(0x40); // set start line address
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i2cWriteCommand(0x81); // set contrast control register
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i2cWriteCommand(0xCF); // set contrast
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i2cWriteCommand(0xA1); // set segment re-map
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i2cWriteCommand(0xC8); // set COM output scan direction
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i2cWriteCommand(0xA6); // set normal display
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i2cWriteCommand(0xA8); // set multiplex ratio(1 to 64)
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i2cWriteCommand(0x3F); // 1/64 duty
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i2cWriteCommand(0xD3); // set display offset
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i2cWriteCommand(0x00); // not offset
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i2cWriteCommand(0xD5); // set display clock divide ratio/oscillator frequency
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i2cWriteCommand(0x80); // set divide ratio
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i2cWriteCommand(0xD9); // set pre-charge period
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i2cWriteCommand(0xF1); // set pre-charge voltage
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i2cWriteCommand(0xDA); // set com pins hardware configuration
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i2cWriteCommand(0x12);
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i2cWriteCommand(0xDB); // set vcomh
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i2cWriteCommand(0x40); // 0.77*vcc
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i2cWriteCommand(0x20); // set memory addressing mode
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i2cWriteCommand(0x02); // set page addressing mode
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i2cWriteCommand(0x8D); // set charge pump enable/disable
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i2cWriteCommand(0x14); // set(0x10) disable
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i2cWriteCommand(0xAF); // display on
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display_fill(0x00);
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display_set_pos(0, 0);
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} |