From 64626b33e73ef6fdf4a6234ac74f59d193e08e35 Mon Sep 17 00:00:00 2001 From: Nathael Pajani Date: Sun, 19 Mar 2017 19:35:49 +0100 Subject: [PATCH] Oled ssd130x example. --- oled/Makefile | 13 ++++ oled/README | 30 ++++++++ oled/main.c | 198 ++++++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 241 insertions(+) create mode 100644 oled/Makefile create mode 100644 oled/README create mode 100644 oled/main.c diff --git a/oled/Makefile b/oled/Makefile new file mode 100644 index 0000000..954c63f --- /dev/null +++ b/oled/Makefile @@ -0,0 +1,13 @@ +# Makefile for "base" apps +# This includes apps for the GPIO Demo Module and for the LPC1224-BO board. + +MODULE = $(shell basename $(shell cd .. && pwd && cd -)) +NAME = $(shell basename $(CURDIR)) + +.PHONY: $(NAME).bin +$(NAME).bin: + @make -C ../../.. --no-print-directory NAME=$(NAME) MODULE=$(MODULE) apps/$(MODULE)/$(NAME)/$@ + +clean mrproper: + @make -C ../../.. --no-print-directory $@ + diff --git a/oled/README b/oled/README new file mode 100644 index 0000000..6488fc4 --- /dev/null +++ b/oled/README @@ -0,0 +1,30 @@ +Oled display example for displays using SSD130x driver + +Copyright 2016 Nathael Pajani + + +/* **************************************************************************** + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see . + * + *************************************************************************** */ + +This example shows the support of the I²C driver for the SSD130x oled display +controller, as found on MCOT128064N2Z-YM DISPLAY from MIDAS, used on +Seeed-Studio's 128 x 64 Oled display board, and on Techno-Innov's Scialys +display board. + +Other display are supported by using charge_pump configuration setting. + +The example starts with one pixel line "on" per character line, and then +displays text received from the uart on the second line of the display. diff --git a/oled/main.c b/oled/main.c new file mode 100644 index 0000000..f6c04bf --- /dev/null +++ b/oled/main.c @@ -0,0 +1,198 @@ +/**************************************************************************** + * apps/base/oled/main.c + * + * Example of Support for Oled 128*64 display + * + * Copyright 2016 Nathael Pajani + * + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see . + * + *************************************************************************** */ + + + +#include "core/system.h" +#include "core/systick.h" +#include "core/pio.h" +#include "lib/stdio.h" +#include "drivers/serial.h" +#include "drivers/gpio.h" +#include "drivers/i2c.h" + +#include "extdrv/status_led.h" +#include "extdrv/ssd130x_oled_driver.h" +#include "lib/font.h" + + +#define MODULE_VERSION 0x04 +#define MODULE_NAME "GPIO Demo Module" + + +#define SELECTED_FREQ FREQ_SEL_48MHz + + +/***************************************************************************** */ +/* Pins configuration */ +/* pins blocks are passed to set_pins() for pins configuration. + * Unused pin blocks can be removed safely with the corresponding set_pins() call + * All pins blocks may be safelly merged in a single block for single set_pins() call.. + */ +const struct pio_config common_pins[] = { + /* UART 0 : Config / Debug / USB */ + { LPC_UART0_RX_PIO_0_1, LPC_IO_DIGITAL }, + { LPC_UART0_TX_PIO_0_2, LPC_IO_DIGITAL }, + /* I2C : Display */ + { LPC_I2C0_SCL_PIO_0_10, (LPC_IO_DIGITAL | LPC_IO_OPEN_DRAIN_ENABLE) }, + { LPC_I2C0_SDA_PIO_0_11, (LPC_IO_DIGITAL | LPC_IO_OPEN_DRAIN_ENABLE) }, + ARRAY_LAST_PIO, +}; + +const struct pio status_led_green = LPC_GPIO_1_4; +const struct pio status_led_red = LPC_GPIO_1_5; + + + + +/***************************************************************************** */ +/* Basic system init and configuration */ + +void system_init() +{ + /* Stop the Watchdog */ + startup_watchdog_disable(); /* Do it right now, before it gets a chance to break in */ + system_set_default_power_state(); + clock_config(SELECTED_FREQ); + set_pins(common_pins); + gpio_on(); + status_led_config(&status_led_green, &status_led_red); + /* System tick timer MUST be configured and running in order to use the sleeping + * functions */ + systick_timer_on(1); /* 1ms */ + systick_start(); +} + +/* Define our fault handler. This one is not mandatory, the dummy fault handler + * will be used when it's not overridden here. + * Note : The default one does a simple infinite loop. If the watchdog is deactivated + * the system will hang. + */ +void fault_info(const char* name, uint32_t len) +{ + uprintf(UART0, name); + while (1); +} + + +/***************************************************************************** */ +/* Oled Display */ +#define DISPLAY_ADDR 0x78 +struct oled_display display = { + .address = DISPLAY_ADDR, + .bus_num = I2C0, + .charge_pump = SSD130x_EXT_VCC, /* Alt is SSD130x_INTERNAL_PUMP */ + .video_mode = SSD130x_DISP_NORMAL, + .contrast = 128, + .scan_dir = SSD130x_SCAN_BOTTOM_TOP, + .read_dir = SSD130x_RIGHT_TO_LEFT, + .display_offset_dir = SSD130x_MOVE_TOP, + .display_offset = 4, +}; + +#define ROW(x) VERTICAL_REV(x) +DECLARE_FONT(font); + +void display_char(uint8_t line, uint8_t col, uint8_t c) +{ + uint8_t tile = (c > FIRST_FONT_CHAR) ? (c - FIRST_FONT_CHAR) : 0; + uint8_t* tile_data = (uint8_t*)(&font[tile]); + ssd130x_set_tile(&display, col, line, tile_data); +} +int display_line(uint8_t line, uint8_t col, char* text) +{ + int len = strlen((char*)text); + int i = 0; + + for (i = 0; i < len; i++) { + uint8_t tile = (text[i] > FIRST_FONT_CHAR) ? (text[i] - FIRST_FONT_CHAR) : 0; + uint8_t* tile_data = (uint8_t*)(&font[tile]); + ssd130x_set_tile(&display, col++, line, tile_data); + if (col >= (SSD130x_NB_COL / 8)) { + col = 0; + line++; + if (line >= SSD130x_NB_PAGES) { + return i; + } + } + } + return len; +} + +/***************************************************************************** */ +/* Communication over USB */ +uint8_t text_received = 0; +#define NB_CHARS 15 +char inbuff[NB_CHARS + 1]; +void data_rx(uint8_t c) +{ + static int idx = 0; + if ((c != 0) && (c != '\n') && (c != '\r')) { + inbuff[idx++] = c; + if (idx >= NB_CHARS) { + inbuff[NB_CHARS] = 0; + idx = 0; + text_received = 1; + } + } else { + if (idx != 0) { + inbuff[idx] = 0; + text_received = 1; + } + idx = 0; + } +} + + +/***************************************************************************** */ +int main(void) +{ + int ret = 0; + system_init(); + uart_on(UART0, 115200, data_rx); + i2c_on(I2C0, I2C_CLK_100KHz, I2C_MASTER); + + status_led(green_only); + + /* Configure and start display */ + ret = ssd130x_display_on(&display); + /* Erase screen with lines, makes it easier to know things are going right */ + ssd130x_display_set(&display, 0x10); + ret = ssd130x_display_full_screen(&display); + + while (1) { + chenillard(500); + if (text_received != 0) { + display_line(2, 1, inbuff); + ret = ssd130x_display_full_screen(&display); + if (ret != 0) { + uprintf(UART0, "Display update error: %d\n", ret); + } + text_received = 0; + } + } + return 0; +} + + + -- 2.43.0