stm32f103rb驱动max7219点阵无反应，代码如下求解答
**spi.c**
#include "bsp_spi_dot_matrix_led.h"
#include "bsp_usart.h"
/**
* @brief SPI_FLASH初始化
* @param 无
* @retval 无
*/
void SPI_DOT_LED_Init(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
RCC_APB2PeriphClockCmd( RCC_APB2Periph_GPIOB, ENABLE);
/* 配置SPI的 CS引脚，普通IO即可 */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_Init(GPIOB, &GPIO_InitStructure);
/* 配置SPI的 CLK引脚，普通IO即可 */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_13;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_Init(GPIOB, &GPIO_InitStructure);
/* 配置SPI的 DIN引脚，普通IO即可 */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_14;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_Init(GPIOB, &GPIO_InitStructure);
}
////-------------------------------------------
////功能：向MAX7219写入数据
////入口参数：address、dat
////出口参数：无
////说明：
//--------------------------------------------
//功能：向MAX7219(U3)写入字节
//入口参数：DATA
//出口参数：无
//说明：
void Write_Max7219_byte(uchar DATA)
{
uchar i,w;
Max7219_pinCS_LOW();
for(i=8;i>=1;i--)
{
Max7219_pinCLK_LOW();
w=DATA&0x80;
w=DATA>>7;
Max7219_pinDIN(w);
printf(" %d \n",w);
DATA=DATA<<1;//八位的data从高到底把数据以此发送给Max7219_pinDIN
Max7219_pinCLK_HIGH();
}
}
void Write_Max7219(uchar address,uchar dat)
{
Max7219_pinCS_LOW();
Write_Max7219_byte(address); //写入地址，即数码管编号
Write_Max7219_byte(dat); //写入数据，即数码管显示数字
Max7219_pinCS_HIGH();
}
void Init_MAX7219(void)
{
Write_Max7219(0x09, 0x00); //译码方式：BCD码
Write_Max7219(0x0a, 0x03); //亮度
Write_Max7219(0x0b, 0x07); //扫描界限；8个数码管显示
Write_Max7219(0x0c, 0x01); //掉电模式：0，普通模式：1
Write_Max7219(0x0f, 0x00); //显示测试：1；测试结束，正常显示：0
}
/*********************************************END OF FILE**********************/
main.c
#include "stm32f10x.h"
#include "bsp_spi_dot_matrix_led.h"
#include "bsp_SysTick.h"
/* disp1为需要显示字库*/ //其他字可以去网上下载 取模软件
uchar disp1[38][8]={
{0xB4,0x4A,0x8A,0xBE,0x4A,0x4A,0x41,0xFF},/*"迅",0*/
{0x40,0x88,0x7E,0x48,0x4C,0x52,0x7F,0x0},/*"达",0*/
{0x0,0x41,0x22,0x14,0x8,0x14,0x22,0x41},//X
{0x42,0x42,0x42,0x42,0x42,0x42,0x22,0x1C},//U
{0x0,0x42,0x62,0x52,0x4A,0x46,0x42,0x0},//N
{0x7C,0x42,0x42,0x42,0x42,0x42,0x7C,0x0},//D
{0x8,0x14,0x22,0x3E,0x22,0x22,0x22,0x22},//A
{0x10,0x5B,0x24,0x24,0x28,0x18,0x18,0x24},/*"文",0*/
{0x00,0x7E,0x10,0x2C,0x24,0x3C,0x24,0x3C},/*"百",0*/
//{0x3C,0x42,0x42,0x42,0x42,0x42,0x42,0x3C},//0
//{0x10,0x18,0x14,0x10,0x10,0x10,0x10,0x10},//1
//{0x7E,0x2,0x2,0x7E,0x40,0x40,0x40,0x7E},//2
//{0x3E,0x2,0x2,0x3E,0x2,0x2,0x3E,0x0},//3
//{0x8,0x18,0x28,0x48,0xFE,0x8,0x8,0x8},//4
//{0x3C,0x20,0x20,0x3C,0x4,0x4,0x3C,0x0},//5
//{0x3C,0x20,0x20,0x3C,0x24,0x24,0x3C,0x0},//6
//{0x3E,0x22,0x4,0x8,0x8,0x8,0x8,0x8},//7
//{0x0,0x3E,0x22,0x22,0x3E,0x22,0x22,0x3E},//8
{0x3E,0x22,0x22,0x3E,0x2,0x2,0x2,0x3E},//9
{0x8,0x14,0x22,0x3E,0x22,0x22,0x22,0x22},//A
{0x3C,0x22,0x22,0x3E,0x22,0x22,0x3C,0x0},//B
{0x3C,0x40,0x40,0x40,0x40,0x40,0x3C,0x0},//C
{0x7C,0x42,0x42,0x42,0x42,0x42,0x7C,0x0},//D
{0x7C,0x40,0x40,0x7C,0x40,0x40,0x40,0x7C},//E
{0x7C,0x40,0x40,0x7C,0x40,0x40,0x40,0x40},//F
{0x3C,0x40,0x40,0x40,0x40,0x44,0x44,0x3C},//G
{0x44,0x44,0x44,0x7C,0x44,0x44,0x44,0x44},//H
{0x7C,0x10,0x10,0x10,0x10,0x10,0x10,0x7C},//I
{0x3C,0x8,0x8,0x8,0x8,0x8,0x48,0x30},//J
{0x0,0x24,0x28,0x30,0x20,0x30,0x28,0x24},//K
{0x40,0x40,0x40,0x40,0x40,0x40,0x40,0x7C},//L
{0x81,0xC3,0xA5,0x99,0x81,0x81,0x81,0x81},//M
{0x0,0x42,0x62,0x52,0x4A,0x46,0x42,0x0},//N
{0x3C,0x42,0x42,0x42,0x42,0x42,0x42,0x3C},//O
{0x3C,0x22,0x22,0x22,0x3C,0x20,0x20,0x20},//P
{0x1C,0x22,0x22,0x22,0x22,0x26,0x22,0x1D},//Q
{0x3C,0x22,0x22,0x22,0x3C,0x24,0x22,0x21},//R
{0x0,0x1E,0x20,0x20,0x3E,0x2,0x2,0x3C},//S
{0x0,0x3E,0x8,0x8,0x8,0x8,0x8,0x8},//T
{0x42,0x42,0x42,0x42,0x42,0x42,0x22,0x1C},//U
{0x42,0x42,0x42,0x42,0x42,0x42,0x24,0x18},//V
{0x0,0x49,0x49,0x49,0x49,0x2A,0x1C,0x0},//W
{0x0,0x41,0x22,0x14,0x8,0x14,0x22,0x41},//X
{0x41,0x22,0x14,0x8,0x8,0x8,0x8,0x8},//Y
{0x0,0x7F,0x2,0x4,0x8,0x10,0x20,0x7F},//Z
{0x8,0x7F,0x49,0x49,0x7F,0x8,0x8,0x8},//中
{0xFE,0xBA,0x92,0xBA,0x92,0x9A,0xBA,0xFE},//国
};
int main(void)
{
SysTick_Init();//始终初始化
SPI_DOT_LED_Init();//初始化传输用的GPIO
Init_MAX7219();//初始化MAX7219
while(1)
{
uchar i,j;
for(j=0;j<38;j++)
{
for(i=1;i<9;i++)
Write_Max7219(i,disp1[j][i-1]);
SysTick_Delay_Ms( 1000);
}
}
}
/*********************************************END OF FILE**********************/
spi.h
#ifndef _DOT_MATRIX_LED
#define _DOT_MATRIX_LED
#include "stm32f10x.h"
#define uchar unsigned char
#define uint unsigned int
//CS(NSS)引脚 片选选普通GPIO即可
#define FLASH_SPI_CS_CLK RCC_APB2Periph_GPIOB
#define FLASH_SPI_CS_PORT GPIOB
#define FLASH_SPI_CS_PIN GPIO_Pin_12
//CLK()引脚 片选选普通GPIO即可
#define FLASH_SPI_CLK_CLK RCC_APB2Periph_GPIOB
#define FLASH_SPI_CLK_PORT GPIOB
#define FLASH_SPI_CLK_PIN GPIO_Pin_13
//DIN()引脚 片选选普通GPIO即可
#define FLASH_SPI_DIN_APBxClock_FUN RCC_APB2PeriphClockCmd
#define FLASH_SPI_DIN_CLK RCC_APB2Periph_GPIOB
#define FLASH_SPI_DIN_PORT GPIOB
#define FLASH_SPI_DIN_PIN GPIO_Pin_14
/*以下定义了各个引脚高低电平的宏*/
#define Max7219_pinCLK_LOW() GPIO_ResetBits( FLASH_SPI_CLK_PORT, FLASH_SPI_CLK_PIN )
#define Max7219_pinCLK_HIGH() GPIO_SetBits( FLASH_SPI_CLK_PORT, FLASH_SPI_CLK_PIN )
#define Max7219_pinCS_LOW() GPIO_ResetBits( FLASH_SPI_CS_PORT, FLASH_SPI_CS_PIN )
#define Max7219_pinCS_HIGH() GPIO_SetBits( FLASH_SPI_CS_PORT, FLASH_SPI_CS_PIN )
#define Max7219_pinDIN_LOW() GPIO_ResetBits( FLASH_SPI_DIN_PORT,FLASH_SPI_DIN_PIN )
#define Max7219_pinDIN_HIGH() GPIO_SetBits( FLASH_SPI_DIN_PORT, FLASH_SPI_DIN_PIN )
#define Max7219_pinDIN(a) if (a) \
Max7219_pinDIN_HIGH() ;\
else \
Max7219_pinDIN_LOW()
void SPI_DOT_LED_Init(void);
void Write_Max7219_byte(uchar DATA);
void Write_Max7219(uchar address,uchar dat);
void Init_MAX7219(void);
#endif /* _DOT_MATRIX_LED */
#include "bsp_SysTick.h"
#include "core_cm3.h"
#include "misc.h"
static __IO u32 TimingDelay;
/**
* @brief 启动系统滴答定时器 SysTick
* @param 无
* @retval 无
*/
void SysTick_Init(void)
{
/* SystemFrequency / 1000 1ms中断一次
* SystemFrequency / 100000 10us中断一次
* SystemFrequency / 1000000 1us中断一次
*/
// if (SysTick_Config(SystemFrequency / 100000)) // ST3.0.0库版本
if (SysTick_Config(SystemCoreClock / 100000)) // ST3.5.0库版本
{
/* Capture error */
while (1);
}
}
/**
* @brief us延时程序,10us为一个单位
* @param
* @arg nTime: Delay_us( 1 ) 则实现的延时为 1 * 10us = 10us
* @retval 无
*/
void Delay_us(__IO u32 nTime)
{
TimingDelay = nTime;
// 使能滴答定时器
SysTick->CTRL |= SysTick_CTRL_ENABLE_Msk;
while(TimingDelay != 0);
}
/**
* @brief 获取节拍程序
* @param 无
* @retval 无
* @attention 在 SysTick 中断函数 SysTick_Handler()调用
*/
void TimingDelay_Decrement(void)
{
if (TimingDelay != 0x00)
{
TimingDelay--;
}
}
#if 0 //0不生效 屏蔽代码；1生效 编译代码
// 这个 固件库函数 在 core_cm3.h中
static __INLINE uint32_t SysTick_Config(uint32_t ticks)
{
// reload 寄存器为24bit，最大值为2^24
if (ticks > SysTick_LOAD_RELOAD_Msk) return (1);
// 配置 reload 寄存器的初始值
SysTick->LOAD = (ticks & SysTick_LOAD_RELOAD_Msk) - 1;
// 配置中断优先级为 1<<4-1 = 15，优先级为最低 1左移四位 0001=1变为 1 0000=16
NVIC_SetPriority (SysTick_IRQn, (1<<__NVIC_PRIO_BITS) - 1);
// 配置 counter 计数器的值
SysTick->VAL = 0;
// 配置systick 的时钟为 72M
// 使能中断
// 使能systick
SysTick->CTRL = SysTick_CTRL_CLKSOURCE_Msk |
SysTick_CTRL_TICKINT_Msk |
SysTick_CTRL_ENABLE_Msk;
return (0);
}
#endif
// couter 减1的时间 等于 1/systick_clk
// 当counter 从 reload 的值减小到0的时候，为一个循环，如果开启了中断则执行中断服务程序，
// 同时 CTRL 的 countflag 位会置1
// 这一个循环的时间为 reload * (1/systick_clk)
void SysTick_Delay_Us( __IO uint32_t us)
{
uint32_t i;
/* SystemFrequency / 1000 1ms中断一次
* SystemFrequency / 100000 10us中断一次
* SystemFrequency / 1000000 1us中断一次
*/
SysTick_Config(SystemCoreClock/1000000);//用来调节中断的节拍，
for(i=0;i<us;i++)
{
// 当计数器的值减小到0的时候，CRTL寄存器的位16会置1
while( !((SysTick->CTRL)&(1<<16)) );
}
// 关闭SysTick定时器
SysTick->CTRL &=~SysTick_CTRL_ENABLE_Msk;
}
void SysTick_Delay_Ms( __IO uint32_t ms)
{
uint32_t i;
SysTick_Config(SystemCoreClock/1000);
for(i=0;i<ms;i++)
{
// 当计数器的值减小到0的时候，CRTL寄存器的位16会置1
// 当置1时，读取该位会清0
while( !((SysTick->CTRL)&(1<<16)) );
}
// 关闭SysTick定时器
SysTick->CTRL &=~ SysTick_CTRL_ENABLE_Msk;
}
/*********************************************END OF FILE**********************/
