IAR7.4+STM32CUBEMX调试通过。
显示部分,作为麦知智能小车的一部分。显示屏是OLED 1.3寸,控制器是sh1106,但像素是128*64,价格达到惊人的45元/片。
只提供代码,而不同时说明硬件电路图,是导致情景不能复现的主要原因。
这个是委托方提供的原理图和硬件,他每条线都有上拉电阻,显然是打算用模拟SPI。
我在代码里,将cs,dc,res配置为开漏输出,或者推挽输出,都可以正常显示图像。
不知道cs,res在推挽模式下,会不会有问题,所以使用cube配置为OD,低速,而SCLK,SDA默认为PP(配置SPI的默认设置)
与ugfx接口的底层驱动:
- </pre><p><pre name="code" class="cpp">/*
- * This file is subject to the terms of the GFX License. If a copy of
- * the license was not distributed with this file,you can obtain one at:
- *
- * http://ugfx.org/license.html
- * file: board_SSD1306.h
- * author: yu
- * date: 2015.12.14
- * site: www.mazclub.com
- */
- /**
- * @file boards/addons/gdisp/board_SSD1306_spi.h
- * @brief GDISP Graphic Driver subsystem board interface for the SSD1306 display.
- *
- * @note This file contains a mix of hardware specific and operating system specific
- * code. You will need to change it for your cpu and/or operating system.
- */
- #ifndef _GDISP_LLD_BOARD_H
- #define _GDISP_LLD_BOARD_H
- #include "stm32f1xx_hal.h"
- #include "cmsis_os.h"
- // The command byte to put on the front of each page line
- //#define SSD1306_PAGE_PREFIX 0x40 // Co = 0,D/C = 1
- // For a multiple display configuration we would put all this in a structure and then
- // set g->board to that structure.
- #define OLED_DC_Port (GPIOC)
- #define OLED_DC_Pin (GPIO_PIN_15)
- #define OLED_CS_Port (GPIOA)
- #define OLED_CS_Pin (GPIO_PIN_8)
- #define OLED_RES_Port (GPIOC)
- #define OLED_RES_Pin (GPIO_PIN_14)
- #define OLED_RES(a) if (a) \
- HAL_GPIO_WritePin(OLED_RES_Port,OLED_RES_Pin,GPIO_PIN_SET);\
- else \
- HAL_GPIO_WritePin(OLED_RES_Port,GPIO_PIN_RESET)
- #define OLED_DC(a) if (a) \
- HAL_GPIO_WritePin(OLED_DC_Port,OLED_DC_Pin,GPIO_PIN_SET);\
- else \
- HAL_GPIO_WritePin(OLED_DC_Port,GPIO_PIN_RESET)
- #define OLED_CS(a) if (a) \
- HAL_GPIO_WritePin(OLED_CS_Port,OLED_CS_Pin,GPIO_PIN_SET);\
- else \
- HAL_GPIO_WritePin(OLED_CS_Port,GPIO_PIN_RESET)
- #define SET_RST HAL_GPIO_WritePin(OLED_RES_Port,GPIO_PIN_SET);
- #define CLR_RST HAL_GPIO_WritePin(OLED_RES_Port,GPIO_PIN_RESET);
- extern SPI_HandleTypeDef hspi1;
- static void init_board(GDisplay *g) {
- // As we are not using multiple displays we set g->board to NULL as we don't use it.
- g->board = 0;
- }
- static void post_init_board(GDisplay *g) {
- (void) g;
- }
- static void setpin_reset(GDisplay *g,bool_t state) {
- (void) g;
- if(state)
- CLR_RST
- else
- SET_RST
- }
- static void acquire_bus(GDisplay *g) {
- (void) g;
- }
- static void release_bus(GDisplay *g) {
- (void) g;
- }
- static void write_cmd(GDisplay *g,uint8_t cmd) {
- (void) g;
- OLED_DC(0);
- OLED_CS(0);
- HAL_SPI_Transmit(&hspi1,&cmd,1,1);
- OLED_CS(1);
- }
- static void write_data(GDisplay *g,uint8_t* data,uint16_t length) {
- (void) g;
- OLED_DC(1);
- OLED_CS(0);
- HAL_StatusTypeDef status = HAL_SPI_Transmit(&hspi1,data,length,20);
- if (status != HAL_OK) {
- HAL_GPIO_WritePin(GPIOC,GPIO_PIN_9,GPIO_PIN_SET);
- HAL_Delay(200);
- HAL_GPIO_WritePin(GPIOC,GPIO_PIN_RESET);
- }
- OLED_CS(1);
- }
ugfx默认支持chibios,是其一部分,使用IAR编译,会有警告,只能忽略,还没看到什么不良影响。
使用demo里面的代码,画一个矩形。