本帖最后由 su27meng 于 2011-12-9 13:53 编辑
芯片型号STM32F103ZET6，液晶驱动芯片为ILI9340, 液晶片选NE1(PD7管脚)，液晶RS(A19)PE3管脚。数据宽度为16位。下面的代码为FSMC IO口初始化代码和FSMC初始化代码。出现的问题，通过示波器测量发现，循环的发送命令数据时，RS管脚并没有出现规律的高低电平变化，反而是一直维持在一个不高不低的水平(未知状态)。希望大侠们帮小弟看一下，下面的代码是否有问题。不胜感激。
static uint16_t *lcd_addr = (uint16_t *)(((uint32_t)0x60000000));
static uint16_t *LcdCmd = (uint16_t *)(0x60000000);
static uint16_t *LcdData = (uint16_t *)(0x60000000 | 0x00100000);
void LCD_WriteCmd(uint8_t cmd){
*LcdCmd = cmd;
delay(10);
}
void LCD_WriteData(uint8_t data){
*LcdData = data;
}
void LCD_GPIO_Init(){
GPIO_InitTypeDef GPIO_InitStructure;
/* 使能 FSMC, GPIOD, GPIOE, GPIOF, GPIOG 和 AFIO 时钟 */
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_FSMC, ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOD | RCC_APB2Periph_GPIOE |
RCC_APB2Periph_GPIOF | RCC_APB2Periph_GPIOG |RCC_APB2Periph_AFIO, ENABLE);
/* 设置 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) 为复用推挽输出 */
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);
/* 设置 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) 为复用推挽输出 */
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);
/* 设置 PE.03(A19 (RS))为复用推挽输出 */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_Init(GPIOE, &GPIO_InitStructure);
/* 设置 PD.07(NE1 (LCD/CS)) 为复用推挽输出 - CE3(LCD /CS) */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_7;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_Init(GPIOD, &GPIO_InitStructure);
GPIO_LCD_BackLight_Init();
}
static void GPIO_LCD_BackLight_Init(void){
GPIO_InitTypeDef GPIO_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_Init(GPIOB, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
GPIO_Init(GPIOF, &GPIO_InitStructure);
}
/*
* Funciton Name: LCDE_FSMC_Config
* Function fuction: 配置LCD的FSMC并口访问时序
*/
void LCD_FSMC_Config(void){
FSMC_NORSRAMInitTypeDef
FSMC_NORSRAMInitStructure;
FSMC_NORSRAMTimingInitTypeDef
FSMC_NORSRAMTimingInitStructure;
/*-- FSMC Configuration ------------------------------------------------------*/
/*----------------------- SRAM Bank 4 ----------------------------------------*/
/* FSMC_Bank1_NORSRAM4 configuration */
FSMC_NORSRAMTimingInitStructure.FSMC_AddressSetupTime = 0;
FSMC_NORSRAMTimingInitStructure.FSMC_AddressHoldTime = 1;
FSMC_NORSRAMTimingInitStructure.FSMC_DataSetupTime = 1;
FSMC_NORSRAMTimingInitStructure.FSMC_BusTurnAroundDuration = 0;
FSMC_NORSRAMTimingInitStructure.FSMC_CLKDivision = 0;
FSMC_NORSRAMTimingInitStructure.FSMC_DataLatency = 1;
FSMC_NORSRAMTimingInitStructure.FSMC_AccessMode = FSMC_AccessMode_A;
//code from armfly
/* 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 */
FSMC_NORSRAMInitStructure.FSMC_Bank = FSMC_Bank1_NORSRAM1;
FSMC_NORSRAMInitStructure.FSMC_DataAddressMux = FSMC_DataAddressMux_Disable;
FSMC_NORSRAMInitStructure.FSMC_MemoryType = FSMC_MemoryType_SRAM;
FSMC_NORSRAMInitStructure.FSMC_MemoryDataWidth = FSMC_MemoryDataWidth_16b;
FSMC_NORSRAMInitStructure.FSMC_BurstAccessMode = FSMC_BurstAccessMode_Disable;
//code from armfly
FSMC_NORSRAMInitStructure.FSMC_WaitSignalPolarity = FSMC_WaitSignalPolarity_High;
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;
FSMC_NORSRAMInitStructure.FSMC_WriteBurst = FSMC_WriteBurst_Disable;
FSMC_NORSRAMInitStructure.FSMC_ReadWriteTimingStruct = &FSMC_NORSRAMTimingInitStructure;
FSMC_NORSRAMInitStructure.FSMC_WriteTimingStruct = &FSMC_NORSRAMTimingInitStructure;
FSMC_NORSRAMInit(&FSMC_NORSRAMInitStructure);
FSMC_NORSRAMCmd(FSMC_Bank1_NORSRAM1, ENABLE);
} |
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