最近在用RT-thread开发FMSC驱动TFT,碰到非常非常奇怪...
最近在用RT-thread开发FMSC驱动TFT，碰到一个非常非常奇怪问题，老是保总线出错，而同样代码没有RT-thread，却不报错，郁闷至极，主要代码如下：#define Bank1_LCD_DATA 0x60020000 //disp Data ADDR
#define Bank1_LCD_CMD 0x60000000 //disp Reg ADDR
//#define LCD_REG *(vu16 *)(Bank1_LCD_CMD)
//#define LCD_RAM *(vu16 *)(Bank1_LCD_DATA)
#define LCD_REG *((volatile unsigned short *)Bank1_LCD_CMD)
#define LCD_RAM *((volatile unsigned short *)Bank1_LCD_DATA))
LCD_REG=2;
LCD_RAM=6;只要一执行到这句就报错
调试汇编代码：
20: LCD_REG = a;
0x08001FAA F04F42C0 MOV r2,#0x60000000
0x08001FAE 8010 STRH r0,
121: LCD_RAM = b;
0x08001FB0 4802 LDR r0, ; @0x08001FBC 就是这句就报总线出错。
0x08001FB2 8001 STRH r1,
附FMSC初始化代码：
void LCD_CtrlLinesConfig(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
/* Enable FSMC, GPIOD, GPIOE, GPIOF, GPIOG and AFIO clocks */
RCC_APB2PeriphClockCmd(//RCC_APB2Periph_GPIOB |//SDHC
RCC_APB2Periph_GPIOD | RCC_APB2Periph_GPIOE |
RCC_APB2Periph_AFIO, ENABLE);
/* Set PD.00(D2), PD.01(D3), PD.04(NOE), PD.05(NWE), PD.08(D13), PD.09(D14),
PD.10(D15), PD.14(D0), PD.15(D1) as alternate
function push pull */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1 | GPIO_Pin_4 | GPIO_Pin_5 |
GPIO_Pin_8 | GPIO_Pin_9 | GPIO_Pin_10 | GPIO_Pin_14 |
GPIO_Pin_15;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_Init(GPIOD, &GPIO_InitStructure);
/* Set PE.07(D4), PE.08(D5), PE.09(D6), PE.10(D7), PE.11(D8), PE.12(D9), PE.13(D10),
PE.14(D11), PE.15(D12) as alternate function push pull */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_7 | GPIO_Pin_8 | GPIO_Pin_9 | GPIO_Pin_10 |
GPIO_Pin_11 | GPIO_Pin_12 | GPIO_Pin_13 | GPIO_Pin_14 |
GPIO_Pin_15;
GPIO_Init(GPIOE, &GPIO_InitStructure);
// GPIO_WriteBit(GPIOE, GPIO_Pin_6, Bit_SET);
/* Set PF.00(A0 (RS)) as alternate function push pull */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11;
GPIO_Init(GPIOD, &GPIO_InitStructure);
/* Set PG.12(NE4 (LCD/CS)) as alternate function push pull - CE1(LCD /CS) */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_7;
GPIO_Init(GPIOD, &GPIO_InitStructure);
}
/*******************************************************************************
* Function Name : LCD_FSMCConfig
* Description : Configures the Parallel interface (FSMC) for LCD(Parallel mode)
* Input : None
* Output : None
* Return : None
*******************************************************************************/
void LCD_FSMCConfig(void)
{
FSMC_NORSRAMInitTypeDef FSMC_NORSRAMInitStructure;
FSMC_NORSRAMTimingInitTypeDef p;
/*-- FSMC Configuration ------------------------------------------------------*/
/*----------------------- SRAM Bank 4 ----------------------------------------*/
/* FSMC_Bank1_NORSRAM4 configuration */
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_FSMC, ENABLE);
p.FSMC_AddressSetupTime = 1; //ADDSET 地址建立时间
p.FSMC_AddressHoldTime = 0; //ADDHOLD 地址保持时间
p.FSMC_DataSetupTime = 2; //DATAST 数据建立时间
p.FSMC_BusTurnAroundDuration = 0; //BUSTURN 总线返转时间
p.FSMC_CLKDivision = 0; //CLKDIV 时钟分频
p.FSMC_DataLatency = 0; //DATLAT 数据保持时间
/* Color LCD configuration ------------------------------------
LCD configured as follow:
- Data/Address MUX = Disable
- Memory Type = SRAM
- Data Width = 16bit
- Write Operation = Enable
- Extended Mode = Enable
- Asynchronous Wait = Disable */
p.FSMC_AccessMode = FSMC_AccessMode_B; //ACCMOD FSMC 访问模式
FSMC_NORSRAMInitStructure.FSMC_Bank = FSMC_Bank1_NORSRAM1; //扩展nor bank的第4个bank
FSMC_NORSRAMInitStructure.FSMC_DataAddressMux = FSMC_DataAddressMux_Disable; //不使用总线复用
FSMC_NORSRAMInitStructure.FSMC_MemoryType = FSMC_MemoryType_SRAM; //扩展类型
///*
FSMC_NORSRAMInitStructure.FSMC_MemoryDataWidth = FSMC_MemoryDataWidth_16b; //数据宽度
FSMC_NORSRAMInitStructure.FSMC_BurstAccessMode = FSMC_BurstAccessMode_Disable;
FSMC_NORSRAMInitStructure.FSMC_WaitSignalPolarity = FSMC_WaitSignalPolarity_Low; //
FSMC_NORSRAMInitStructure.FSMC_WrapMode = FSMC_WrapMode_Disable;
FSMC_NORSRAMInitStructure.FSMC_WaitSignalActive = FSMC_WaitSignalActive_BeforeWaitState;
FSMC_NORSRAMInitStructure.FSMC_WriteOperation = FSMC_WriteOperation_Enable;
FSMC_NORSRAMInitStructure.FSMC_WaitSignal = FSMC_WaitSignal_Disable;
FSMC_NORSRAMInitStructure.FSMC_ExtendedMode = FSMC_ExtendedMode_Disable; //读写统一参数
//FSMC_NORSRAMInitStructure.FSMC_AsyncWait = FSMC_AsyncWait_Disable;
FSMC_NORSRAMInitStructure.FSMC_WriteBurst = FSMC_WriteBurst_Disable;
FSMC_NORSRAMInitStructure.FSMC_ReadWriteTimingStruct = &p;
FSMC_NORSRAMInitStructure.FSMC_WriteTimingStruct = &p;
//*/
FSMC_NORSRAMInit(&FSMC_NORSRAMInitStructure);
/* BANK 4 (of NOR/SRAM Bank 1~4) is enabled */
FSMC_NORSRAMCmd(FSMC_Bank1_NORSRAM1, ENABLE);
}
那位高手能帮我看看！！谢谢
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