122 lines
3.0 KiB
Plaintext
122 lines
3.0 KiB
Plaintext
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// display.c
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/*
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* Copyright (c) 2014-2017 Cesanta Software Limited
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* All rights reserved
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*/
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#include <Arduino.h>
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#include <Adafruit_SSD1306.h>
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#include "common/cs_dbg.h"
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#include "fw/src/mgos_app.h"
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#include "fw/src/mgos_timers.h"
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Adafruit_SSD1306 *d1 = nullptr, *d2 = nullptr;
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static void timer_cb(void *arg);
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void setup(void) {
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// I2C
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d1 = new Adafruit_SSD1306(4 /* RST GPIO */, Adafruit_SSD1306::RES_128_64);
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if (d1 != nullptr) {
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d1->begin(SSD1306_SWITCHCAPVCC, 0x3D, true /* reset */);
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d1->display();
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}
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// SPI.
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// On ESP8266 SPI and I2C cannot be enabled at the same time by default
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// because their pins overlap.
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// You will need to disable I2C and enable SPI:
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// mos config-set i2c.enable=false spi.enable=true
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d2 = new Adafruit_SSD1306(21 /* DC */, 5 /* RST */, 17 /* CS */,
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Adafruit_SSD1306::RES_128_32);
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if (d2 != nullptr) {
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d2->begin(SSD1306_SWITCHCAPVCC, 0 /* unused */, true /* reset */);
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d2->display();
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}
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mgos_set_timer(1000 /* ms */, true /* repeat */, timer_cb, NULL);
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}
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static void show_num(Adafruit_SSD1306 *d, const char *s, int i) {
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d->clearDisplay();
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d->setTextSize(2);
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d->setTextColor(WHITE);
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d->setCursor(d->width() / 4, d->height() / 4);
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d->printf("%s%d", s, i);
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d->display();
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}
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static void timer_cb(void *arg) {
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static int i = 0, j = 0;
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if (d1 != nullptr) show_num(d1, "i = ", i);
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if (d2 != nullptr) show_num(d2, "j = ", j);
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LOG(LL_INFO, ("i = %d, j = %d", i, j));
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i++;
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j++;
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(void) arg;
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}
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#if 0
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void loop(void) {
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/* For now, do not use delay() inside loop, use timers instead. */
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}
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#endif
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#if 0
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#include <stdio.h>
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#include "common/cs_dbg.h"
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#include "fw/src/mgos_app.h"
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#include "fw/src/mgos_i2c.h"
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#include "fw/src/mgos_mongoose.h"
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#include "fw/src/mgos_utils.h"
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static struct mgos_i2c *uOLED_i2c;
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static uint8_t from_hex(const char *s) {
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#define HEXTOI(x) (x >= '0' && x <= '9' ? x - '0' : x - 'W')
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int a = tolower(*(const unsigned char *) s);
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int b = tolower(*(const unsigned char *) (s + 1));
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return (HEXTOI(a) << 4) | HEXTOI(b);
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}
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enum mgos_app_init_result uOLED_i2cSetup() {
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struct sys_config_i2c *cfg;
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uOLED_i2c = mgos_i2c_create(const struct sys_config_i2c *cfg);
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return MGOS_APP_INIT_SUCCESS;
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}
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void uOLED_send_hexstring(struct mg_str *s) {
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bool ret = false;
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LOG(LL_INFO, ("Got: [%.*s]", (int) s->len, s->p));
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if (s->len >= 2) {
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int j = 0;
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// struct mgos_i2c *i2c = mgos_i2c_get_global();
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for (size_t i = 0; i < s->len; i += 2, j++) {
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((uint8_t *) s->p)[j] = from_hex(s->p + i);
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}
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ret = mgos_i2c_write(uOLED_i2c, s->p[0], s->p + 1, j, true /* stop */);
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}
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}
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/** \brief Write a byte over I2C
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Write a byte to I2C device _address_. The DC byte determines whether
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the data being sent is a command or display data. Use either I2C_COMMAND
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or I2C_DATA in that parameter. The data byte can be any 8-bit value.
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**/
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void uOLED_i2cWrite(byte address, byte dc, byte data)
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{
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Wire.beginTransmission(address);
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Wire.write(dc); // If data dc = 0, if command dc = 0x40
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Wire.write(data);
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Wire.endTransmission();
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}
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#endif
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