本帖最后由 仙人球W 于 2014-11-27 10:19 编辑
硬件：1，字库芯片GT21L16S2Y
(07040010)GT21L16S2Y用户手册V36.pdf
(430.96 KB)
2，板子 STM32F103C8
3,SPI通讯
1，仿真打断点片选引脚电位正常
2，仿真进入中断，打断点LCDDriver.SPIDataCounter计数到32
问题：LCDDriver.FontData[]数组没有数据
先贴主要代码：
#define FontChipSel 12
#define FontChipSel_EN() GPIOB->BRR=(1<<FontChipSel) //拉低 字库芯片片选脚
#define FontChipSel_Dis() GPIOB->BSRR=(1<<FontChipSel) //置高 字库芯片片选脚
void SPI2_Initial(void)
{
SPI_InitTypeDef SPI_InitStruct;
GPIO_InitTypeDef GPIO_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_SPI2,ENABLE );
SPI_I2S_DeInit(SPI2);
SPI_InitStruct.SPI_Direction = SPI_Direction_2Lines_FullDuplex;
SPI_InitStruct.SPI_Mode = SPI_Mode_Master;
SPI_InitStruct.SPI_DataSize = SPI_DataSize_8b;
SPI_InitStruct.SPI_CPOL = SPI_CPOL_Low;
SPI_InitStruct.SPI_CPHA = SPI_CPHA_2Edge;
SPI_InitStruct.SPI_NSS = SPI_NSS_Soft;
SPI_InitStruct.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_4;
SPI_InitStruct.SPI_FirstBit = SPI_FirstBit_MSB;
SPI_InitStruct.SPI_CRCPolynomial = 7;
SPI_Init(SPI2,&SPI_InitStruct);
SPI_Cmd(SPI2,ENABLE);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12; //SPI片选
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP; //OUT
GPIO_Init(GPIOB, &GPIO_InitStructure);
//Configure SPI2 pins: SCK, MISO and MOSI
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_13 | GPIO_Pin_14 | GPIO_Pin_15;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_Init(GPIOB, &GPIO_InitStructure);
}
void NVIC_Configuration(void)
{
NVIC_InitTypeDef NVIC_InitStructure;
/* Configure the NVIC Preemption Priority Bits */
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_0);
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_InitStructure.NVIC_IRQChannel = SPI2_IRQn;
NVIC_Init(&NVIC_InitStructure);
}
void SPI2_ExecuteRequest(void)
{
SPI2->CR2|=SPI_INT_RXENIE; //使能数据接收完成中断
while((SPI2->SR&0x02)==0); //发送缓冲非空就一直等待
SPI2->DR=UsualRead;
}
/***************************************************
*MSB 表示汉字内码GBCode的高8bits
*LSB 表示汉字内码GBCode的低8bits
*Addr[0]字库芯片最高地址字节
*Addr[1]字库芯片其次地址字节
*Addr[2]字库芯片低地址字节
****************************************************/
FLAG Get_GB15x16_Addr(BYTE MSB,BYTE LSB,BYTE *Addr)
{
u32 Address=0;
FLAG ReVal=TRUE;
if(MSB == 0xA9&& LSB >=0xA1)
Address =(282+ (LSB-0xA1))*32+BaseAdd15x16;
else if(MSB >=0xA1 && MSB <= 0xA3&& LSB >=0xA1)
Address =((MSB-0xA1) * 94 + (LSB-0xA1))*32+ BaseAdd15x16;
else if(MSB >=0xB0 && MSB <= 0xF7 && LSB >=0xA1)
Address = ((MSB-0xB0) * 94 + (LSB-0xA1)+ 846)*32+ BaseAdd15x16;
else
ReVal=FALSE;
Addr[0]=(BYTE)((Address>>16)&0xff);
Addr[1]=(BYTE)((Address>>8)&0xff);
Addr[2]=(BYTE)(Address&0xff);
return(ReVal);
}
void Chinese_character(void)
{
BYTE CMSB,CLSB;
strcpy(tBuffer,"中文汉字编译测试"); // 编译后，拷贝到tBuffer的是汉字内码
CMSB = tBuffer[2];
CLSB = tBuffer[3];
Get_GB15x16_Addr(CMSB,CLSB,LCDDriver.FontChipAddr);
}
void SPI2_IRQHandler(void)
{
u8 Temp;
Temp= SPI2->DR;
if(StartReceFont) //数据接收中断
{
LCDDriver.FontData[LCDDriver.SPIDataCounter++]= Temp;
//if(LCDDriver.SPIDataCounter>=LCDDriver.FontDataNum) //占时是汉字 32个字节
if(LCDDriver.SPIDataCounter>=32) //占时是汉字 32个字节
{
LCDDriver.SPIDataCounter=0;
EndFontRece=1; //一个点阵字符或汉字接收完成
StartReceFont=0;
SPI2->CR2&=~SPI_INT_RXENIE;
FontChipSel_Dis(); //禁止字库片选
}
else
SPI2->DR=0xff; //发送一个Dummy字节数据以便产生Clock
}
else if(SPIStartSent)
{
if(LCDDriver.SPIDataCounter>=3) //三个地址一个Dummy
{
SPI2->DR=0xff; //发送一个Dummy字节数据以便产生Clock
StartReceFont=1;
SPIStartSent=0;
LCDDriver.SPIDataCounter=0;
}
else
SPI2->DR=LCDDriver.FontChipAddr[LCDDriver.SPIDataCounter++];
}
}
//=========================
// 函数名：main
//描述 ：主函数
//输入 ：无
//输出 ：无
//=========================
int main(void)
{
//配置串口1为：9600 8-N-1
USART1_Config();
//配置SPI2
SPI2_Initial();
NVIC_Configuration();
Chinese_character();
printf("\r\n 这是一个2M串行flash(W25Q16)实验 \r\n");
FontChipSel_EN();
SPIStartSent=1;
LCDDriver.SPIDataCounter=0;
SPI2_ExecuteRequest();
while(1)
{
;
}
}
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