stm32F103VB使用uGfx驱动sh1106

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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,dc,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. * * @noteThis 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_PREFIX0x40 // 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,OLED_RES_Pin, 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,OLED_DC_Pin, 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,OLED_CS_Pin, GPIO_PIN_RESET)#define SET_RST HAL_GPIO_WritePin(OLED_RES_Port, OLED_RES_Pin, GPIO_PIN_SET);#define CLR_RST HAL_GPIO_WritePin(OLED_RES_Port, OLED_RES_Pin, 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_RSTelseSET_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_9, 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。

外设初始化代码，由CUBE生成，在此不需列出。

使用demo里面的代码，画一个矩形。

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