トップページに戻る(マイコン徹底入門:STM32で始めるARM/Cortex-M3組み込み開発)
「マイコン徹底入門」とは？ |  「マイコン徹底入門」を読む |  ダウンロード |  掲示板 |  筆者の自己紹介

/**

? * @brief? Writing instruction without busy flag check

? * @param? WriteData: Data to be written

? * @retval : None

? */

void LCD_Write_Init_Inst(uint8_t WriteData)

{

? //RS=0: Instruction

? GPIO_ResetBits(GPIOY_0_PORT, GPIOY_0_PIN);

? LCD_Write_Core(WriteData);

}

/**

? * @brief? Writing instruction with busy flag check

? * @param? WriteData: Data to be written

? * @retval : None

? */

void LCD_Write_Inst(uint8_t WriteData)

{

? while( LCD_Read_Inst() & 0b10000000);

? //RS=0: Instruction

? GPIO_ResetBits(GPIOY_0_PORT, GPIOY_0_PIN);

? LCD_Write_Core(WriteData);

}

/**

? * @brief? Writing data

? * @param? WriteData: Data to be written

? * @retval : None

? */

void LCD_Write_Data(uint8_t WriteData)

{

? while(LCD_Read_Inst() & 0b10000000);

? //RS=1: Data

? GPIO_SetBits(GPIOY_0_PORT, GPIOY_0_PIN);

? LCD_Write_Core(WriteData);

}

while(LCD_Read_Inst() & 0b10000000);

/**

? * @brief? Writing process common in instruction and data

? * @param? WriteData: Data to be written

? * @retval : None

? */

void LCD_Write_Core(uint8_t WriteData)

{

? //RW=0: Write (Output to LCD)

? GPIO_ResetBits(GPIOY_1_PORT, GPIOY_1_PIN);

? //Wait: Setup time: tAS(40) : 40ns : 3 clocks

? WAIT_3_CLOCK;

? //Set GPIO as output

? GPIO_Out_Configuration();

? //Output Data

? GPIO_Write(GPIOX_PORT, (GPIO_ReadOutputData(GPIOX_PORT) & 0xFF00) | (uint16_t)WriteData);

? //E=1: Enable

? GPIO_SetBits(GPIOY_2_PORT, GPIOY_2_PIN);

? //Wait: Pulse time and holdtime: PWEH(220) + tH(10) : 230ns : 18 clocks

? WAIT_18_CLOCK;

? //E=0: Disable

? GPIO_ResetBits(GPIOY_2_PORT, GPIOY_2_PIN);

? //Wait: tC(500) - PWEH(220) - tH(10) - tAS(40) : 230ns : 18 clocks

? WAIT_18_CLOCK;

}