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。
原文链接:https://www.f2er.com/vb/257208.html