使用stm32f030使用c语言生成一个显示24*24字符串的函数
时间: 2024-02-17 15:05:17 浏览: 71
下面是一个简单的示例程序,使用STM32F030微控制器和C语言编写,用于在OLED显示屏上显示24*24字符串。
首先,需要在STM32F030微控制器上配置GPIO口和SPI接口,以便与OLED显示屏进行通信。然后,使用图像处理软件将24*24字符串转换为位图,存储到数组中。
以下是示例代码:
```c
#include "stm32f0xx.h"
#define OLED_CS_H() GPIOA->BSRR |= GPIO_BSRR_BS_4
#define OLED_CS_L() GPIOA->BSRR |= GPIO_BSRR_BR_4
#define OLED_DC_H() GPIOA->BSRR |= GPIO_BSRR_BS_5
#define OLED_DC_L() GPIOA->BSRR |= GPIO_BSRR_BR_5
void OLED_Init(void)
{
// 配置GPIO口
RCC->AHBENR |= RCC_AHBENR_GPIOAEN;
GPIOA->MODER |= GPIO_MODER_MODER4_0 | GPIO_MODER_MODER5_0;
GPIOA->OSPEEDR |= GPIO_OSPEEDER_OSPEEDR4 | GPIO_OSPEEDER_OSPEEDR5;
GPIOA->OTYPER &= ~(GPIO_OTYPER_OT_4 | GPIO_OTYPER_OT_5);
GPIOA->PUPDR &= ~(GPIO_PUPDR_PUPDR4 | GPIO_PUPDR_PUPDR5);
GPIOA->BSRR |= GPIO_BSRR_BS_4 | GPIO_BSRR_BS_5;
// 配置SPI接口
RCC->APB2ENR |= RCC_APB2ENR_SPI1EN;
SPI1->CR1 = SPI_CR1_SSM | SPI_CR1_SSI | SPI_CR1_MSTR | SPI_CR1_BR_0 | SPI_CR1_BR_1;
SPI1->CR2 = SPI_CR2_DS_3 | SPI_CR2_DS_2 | SPI_CR2_DS_1 | SPI_CR2_DS_0;
SPI1->CR1 |= SPI_CR1_SPE;
// 初始化OLED显示屏
OLED_CS_L();
OLED_DC_L();
OLED_DC_H();
OLED_CS_H();
}
void OLED_WriteByte(uint8_t byte)
{
while (!(SPI1->SR & SPI_SR_TXE));
*((__IO uint8_t *)&SPI1->DR) = byte;
}
void OLED_SetPos(uint8_t x, uint8_t y)
{
OLED_WriteByte(0xb0 + y);
OLED_WriteByte(((x & 0xf0) >> 4) | 0x10);
OLED_WriteByte((x & 0x0f) | 0x01);
}
void OLED_ShowChar24x24(uint8_t x, uint8_t y, uint8_t *chr)
{
uint8_t i, j, k;
OLED_SetPos(x, y);
for (i = 0; i < 24; i++)
{
for (j = 0; j < 3; j++)
{
OLED_DC_H();
OLED_CS_L();
for (k = 0; k < 8; k++)
{
if ((chr[i * 3 + j] << k) & 0x80)
{
OLED_WriteByte(0xff);
}
else
{
OLED_WriteByte(0x00);
}
}
OLED_CS_H();
OLED_DC_L();
}
}
}
int main(void)
{
OLED_Init();
uint8_t chr[72] = {0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00};
OLED_ShowChar24x24(0, 0, chr);
while (1)
{
}
}
```
在本例中,`OLED_Init()`函数用于初始化OLED显示屏,`OLED_WriteByte()`函数用于向OLED显示屏写入数据,`OLED_SetPos()`函数用于设置OLED显示屏上的位置,`OLED_ShowChar24x24()`函数用于在OLED显示屏上显示24*24字符串。要显示不同的字符串,只需要更改数组`chr`中的值即可。
注意:此示例程序仅提供了基本的框架和代码,可能需要根据实际情况进行调整。
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