新唐51单片机例程NuvotonSampleCode

/*---------------------------------------------------------------------------------------------------------*/ /* */ /* Copyright(c) 2020 nuvoton Technology Corp. All rights reserved. */ /* */ /*---------------------------------------------------------------------------------------------------------*/ //*********************************************************************************************************** // Website: http://www.nuvoton.com // E-Mail : MicroC-8bit@nuvoton.com // Date : Jan/21/2020 //*********************************************************************************************************** //*********************************************************************************************************** // File Function: ML51 //*********************************************************************************************************** #include "MS51_8K.H" /* For printf code only. Disable this define to reduce code size. */ //#define print_function //*********************************************************************************************************** // File Function: MS51 I2C demo code, Slave Address of 24LC64 = 0xA0 // // ____________ ______________ // | | SDA | | // | |<-------->| | // | | | | // | MS51(M) | | 24LC64(S) | // | | SCL | | // | |--------->| | // |____________| |_____________| // // Microchip I2C EEPROM 24xx64 (64K Bit) is used as the slave device. // The page size are 32Byte. Total are 256 page. // If verification passes, Port3 will show 0x78. If there is any failure // occured during the progress, Port3 will show 0x00. //*********************************************************************************************************** #define I2C_CLOCK 2 #define EEPROM_SLA 0xA0 #define EEPROM_WR 0 #define EEPROM_RD 1 #define EEPROM_PAGE_SIZE 32 #define PAGE_NUMBER 4 #define ERROR_CODE 0x78 #define TEST_OK 0x00 bit I2C_Reset_Flag; //======================================================================================================== void Init_I2C(void) { P03_OPENDRAIN_MODE; /*I2C_SCL*/ P04_OPENDRAIN_MODE; /*I2C_SDA*/ set_P0S_3; set_P0S_4; /* Set I2C clock rate */ I2CLK = I2C_CLOCK; /* Enable I2C */ set_I2CON_I2CEN; } //======================================================================================================== void I2C_SI_Check(void) { if (I2STAT == 0x00) { I2C_Reset_Flag = 1; set_I2CON_STO; clr_I2CON_SI; if(I2CON|CLR_BIT3) { clr_I2CON_I2CEN; set_I2CON_I2CEN; clr_I2CON_SI; clr_I2CON_I2CEN; } } } void One_Page_Read(UINT8 u8PageNumber,UINT8 u8DAT) { UINT8 u8Count; UINT16 u16Address; u16Address = (UINT16)u8PageNumber*32; /* Step1 */ set_I2CON_STA; /* Send Start bit to I2C EEPROM */ clr_I2CON_SI; while (!(I2CON&SET_BIT3)); if (I2STAT != 0x08) /* 0x08: A START condition has been transmitted*/ { I2C_Reset_Flag = 1; #ifdef print_function printf("\nI2C 'Send STA' error"); #endif goto Read_Error_Stop; } /* Step2 */ I2DAT = (EEPROM_SLA | EEPROM_WR); /* Send (SLA+W) to EEPROM */ clr_I2CON_STA; /* Clear STA and Keep SI value in I2CON */ clr_I2CON_SI; while (!(I2CON&SET_BIT3)); if (I2STAT != 0x18) /* 0x18: SLA+W has been transmitted; ACK has been received */ { I2C_Reset_Flag = 1; #ifdef print_function printf("\nI2C 'Send SLA+W' error"); #endif goto Read_Error_Stop; } /* Step3 */ I2DAT = HIBYTE(u16Address); /* Send I2C EEPROM's High Byte Address */ clr_I2CON_SI; while (!(I2CON&SET_BIT3)); if (I2STAT != 0x28) /* 0x28: Data byte in S1DAT has been transmitted; ACK has been received */ { I2C_Reset_Flag = 1; #ifdef print_function printf("\nI2C 'Send I2C High Byte Address' error"); #endif goto Read_Error_Stop; } /* Step4 */ I2DAT = LOBYTE(u16Address); /* Send I2C EEPROM's Low Byte Address */ clr_I2CON_SI; while (!(I2CON&SET_BIT3)); if (I2STAT != 0x28) /* 0x28: Data byte in S1DAT has been transmitted; ACK has been received */ { I2C_Reset_Flag = 1; #ifdef print_function printf("\nI2C 'Send I2C Low Byte Address' error"); #endif goto Read_Error_Stop; } /* Step5 */ set_I2CON_STA; /* Repeated START */ clr_I2CON_SI; while (!(I2CON&SET_BIT3)); if (I2STAT != 0x10) /* 0x10: A repeated START condition has been transmitted */ { I2C_Reset_Flag = 1; #ifdef print_function printf("\nI2C 'Send STA' error"); #endif goto Read_Error_Stop; } /* Step6 */ clr_I2CON_STA; /* Clear STA and Keep SI value in I2CON */ I2DAT = (EEPROM_SLA | EEPROM_RD); /* Send (SLA+R) to EEPROM */ clr_I2CON_SI; while (!(I2CON&SET_BIT3)); if (I2STAT != 0x40) /* 0x40: SLA+R has been transmitted; ACK has been received */ { I2C_Reset_Flag = 1; #ifdef print_function printf("\nI2C 'Send SLA+R' error"); #endif goto Read_Error_Stop; } /* Step7 */ /* Verify I2C EEPROM data */ for (u8Count = 0; u8Count <EEPROM_PAGE_SIZE; u8Count++) { set_I2CON_AA; /* Set Assert Acknowledge Control Bit */ clr_I2CON_SI; while (!(I2CON&SET_BIT3)); if (I2STAT != 0x50) /* 0x50:Data byte has been received; NOT ACK has been returned */ { I2C_Reset_Flag = 1; #ifdef print_function printf("\nI2C 'No Ack' error"); #endif goto Read_Error_Stop; } if (I2DAT != u8DAT) /* Send the Data to EEPROM */ { I2C_Reset_Flag = 1; #ifdef print_function printf("\nI2C 'Read data' error"); #endif goto Read_Error_Stop; } u8DAT = ~u8DAT; } /* Step8 */ clr_I2CON_AA; /* Send a NACK to disconnect 24xx64 */ clr_I2CON_SI; while (!(I2CON&SET_BIT3)); if (I2STAT != 0x58) /* 0x58:Data byte has been received; ACK has been returned */ { I2C_Reset_Flag = 1; #ifdef print_function printf("\nI2C 'Ack' error"); #endif goto Read_Error_Stop; } /* Step9 */ clr_I2CON_SI; set_I2CON_STO; while (I2CON|CLR_BIT4) /* Check STOP signal */ { I2C_SI_Check(); if (I2C_Reset_Flag) goto Read_Error_Stop; } Read_Error_Stop: if (I2C_Reset_Flag) { I2C_SI_Check(); #ifdef print_function printf("\nI2C Read error, test stop"); #endif I2C_Reset_Flag = 0; } } //====================================================