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:
/*
* 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,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_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_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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