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私は専門家ではなくプログラマーでもなく、この種のエラーを出すCコードです。私は多くを得て、それらを整理しようとしましたが、これらを解決することはできません。コードは以下の通りである。マイクロコントローラとeepromを接続する際にエラーが発生しました
/*
* EEPROM.c
* interfacing microchip 24aa64f IC with atmel sam4e
*/
#include <asf.h>
#include "EEPROM_I2C.h"
#define DEVICE_ADDRESS 0x50 // 7-bit device identifier 0101000, (refer datasheet)
//#define EEPROM_NAME 24AA6F
#define I2C_FAST_MODE_SPEED 400000//TWI_BUS_CLOCK 400KHz
#define TWI_CLK_DIVIDER 2
#define TWI_CLK_DIV_MIN 7
#define TWI_CLK_CALC_ARGU 4
#define TWI_CLK_DIV_MAX 0xFF
/*************************** Main function ******************************/
int eeprom_main(void)
{
struct micro24 ptMicro24 ;
typedef struct twi_options twi_options_t;
typedef struct Twi_registers Twi;
char TxBuffer[128] ;
char RxBuffer[128] ;
int BufferIndex;
unsigned int PageCount;
unsigned int error = 0 ;
unsigned int i;
ptMicro24.PageSize = 32;
ptMicro24.NumOfPage = 128;
ptMicro24.EepromSize = 128*32;
ptMicro24.SlaveAddress = DEVICE_ADDRESS;
ptMicro24.EepromName = 64;
/***************************** CLOCK SETTINGS TO GET 400KHz **********************
* Set the I2C bus speed in conjunction with the clock frequency.
* param p_twi Pointer to a TWI instance.
* return value PASS\Fail New speed setting is accepted\rejected
**********************************************************************************/
uint32_t twi_set_speed(struct Twi_registers *Twi, uint32_t ul_speed, uint32_t ul_mck)
//uint32_t twi_set_speed(Twi *p_twi, uint32_t ul_speed, uint32_t ul_mck)
{
uint32_t ckdiv = 0; //clock divider is used to increase both TWCK high and low periods (16-18)
uint32_t c_lh_div; //CHDIV (0-7) and CLDIV (8-15)
if (ul_speed > I2C_FAST_MODE_SPEED) { //ul_speed is the desired I2C bus speed
return FAIL;
}
c_lh_div = ul_mck/(ul_speed * TWI_CLK_DIVIDER) - TWI_CLK_CALC_ARGU; //ul_mck main clock of the device
/* cldiv must fit in 8 bits, ckdiv must fit in 3 bits */
while ((c_lh_div > TWI_CLK_DIV_MAX) && (ckdiv < TWI_CLK_DIV_MIN))
{
ckdiv++; // Increase clock divider
c_lh_div /= TWI_CLK_DIVIDER; //Divide cldiv value
}
/* set clock waveform generator register */
Twi->TWI_CWGR =
TWI_CWGR_CLDIV(c_lh_div) | TWI_CWGR_CHDIV(c_lh_div) |
TWI_CWGR_CKDIV(ckdiv);
return PASS;
}
/************************************ Initialize TWI master mode ************************
* Set the control register TWI_CR by MSEN and SVDIS
* param p_opt Options for initializing the TWI module
* return TWI_SUCCESS if initialization is complete
* twi_options... structure contains clock speed, master clock, chip and smbus
*****************************************************************************************/
uint32_t twi_master_start(struct Twi_registers *Twi, struct twi_options_t *twi_options_t)
//uint32_t twi_master_start(Twi *p_twi, const twi_options_t *p_opt)
{
uint32_t status = TWI_SUCCESS; // status success return code is 0
// Enable master mode and disable slave mode in TWI_CR
Twi -> TWI_CR_START = TWI_CR_START;
Twi->TWI_CR_MSEN = TWI_CR_MSEN; // Set Master Enable bit
Twi->TWI_CR_SVDIS = TWI_CR_SVDIS; // Set Slave Disable bit
/* Select the speed */
//new//if (twi_set_speed(Twi->TWI_SR, twi_options_t->speed, twi_options_t->master_clk) == FAIL)
//if (twi_set_speed(Twi, twi_options_t->speed, twi_options_t->master_clk) == FAIL)
//{
//status = TWI_INVALID_ARGUMENT; /* The desired speed setting is rejected */
//}
if (twi_options_t->smbus == 0)
{
Twi->TWI_CR_QUICK == 0;
status = TWI_INVALID_ARGUMENT;
}
else
if (twi_options_t->smbus == 1)
{
Twi->TWI_CR_QUICK == 1;
status = TWI_SUCCESS;
}
return status;
}
/***************************** WriteByte Function ********************************
This function uses a two bytes internal address (IADR) along with
Internal word address of eeprom.
Return Value: None
***********************************************************************************/
void WriteByte (struct micro24 *ptMicro24, char Data2Write,
unsigned int Address)
//Data2Write is the data to be written n the eeprom
//struct <micro24 *ptMicro24> : Structure of Microchip 24AA Two-wire Eeprom
//unsigned int Address>: Address where to write
{
unsigned int WordAddress;
unsigned int SlaveAddress;
unsigned char p0=0;
TWI_CR_START ==1;
if (ptMicro24->EepromName == 64)
{
if (Address > 0xFFFF)
{
p0 = 1;
/* Mask the 17th bit to get the 16th LSB */
WordAddress = Address & 0xFFFF ;
SlaveAddress = ptMicro24->SlaveAddress + (p0<<16) ;
}
else {
SlaveAddress = ptMicro24->SlaveAddress ;
WordAddress = Address ;
}
}
TWI_CR_STOP ==1;
//TWI_WriteSingleIadr(TWI_IADR_IADR,SlaveAddress, WordAddress,
// TWI_MMR_IADRSZ_2_BYTE, &Data2Write); // declared as extern
// to write to internal address, utilizing internal address and master mode register
//}
/******************** Increase Speed Function *****************************
* TWI is accessed without calling TWI functions
/***************************************************************************/
int NumOfBytes, Count;
int status;
uint32_t Buffer;
/* Enable Master Mode of the TWI */
TWI_CR_MSEN == 1;
// Twi.TWI_CR_MSEN ==1;
//TWI_CR->TWI_CR_MSEN = TWI_CR_MSEN ;
/* Set the TWI Master Mode Register */
Twi->TWI_MMR = (SlaveAddress & (~TWI_MMR_MREAD) | (TWI_MMR_IADRSZ_2_BYTE));
/* Set the internal address to access the wanted page */
Twi -> TWI_IADR = WordAddress ;
/* Wait until TXRDY is high to transmit the next data */
status = TWI_SR_TXRDY;
while (!(status & TWI_SR_TXRDY))
status = TWI_SR_TXRDY;
/* Send the buffer to the page */
for (Count=0; Count < NumOfBytes ;Count++)
{
Twi ->TWI_THR_TXDATA = Buffer++;
/* Wait until TXRDY is high to transmit the next data */
status = TWI_SR_TXRDY;
while (!(status & TWI_SR_TXRDY))
status = TWI_SR_TXRDY;
}
/* Wait for the Transmit complete is set */
status = TWI_SR_TXCOMP;
while (!(status & TWI_SR_TXCOMP))
status = TWI_SR_TXCOMP;
// add some wait function according to datasheet before sending the next data
// e.g: 10ms
// e.g: WaitMiliSecond (10);
}
/****************************** ReadByte Function **************************
This function uses a two bytes internal address (IADR) along with
Internal word address of eeprom.
Return Value: None
****************************************************************************/
char ReadByte (struct micro24 *ptMicro24,
unsigned int Address) //int Address to read
{
unsigned int WordAddress;
unsigned int SlaveAddress;
char Data2Read ;
unsigned char p0=0;
TWI_CR_START == 1;
//p_twi -> TWI_CR_START = TWI_CR_START;
if (ptMicro24->EepromName == 64)
{
if (Address > 0xFFFF) {
p0 = 1;
// Mask the 17th bit to get the 16th LSB
WordAddress = Address & 0xFFFF ;
SlaveAddress = ptMicro24->SlaveAddress + (p0<<16) ;
}
else {
SlaveAddress = ptMicro24->SlaveAddress ;
WordAddress = Address ;
}
}
//TWI_ReadSingleIadr(TWI_IADR_IADR,SlaveAddress,WordAddress,
// TWI_MMR_IADRSZ_2_BYTE,&Data2Read);
// declared as extern
// to write to internal address, utilizing internal address and master mode register
return (Data2Read);
}
}
エラーは以下のとおりですの宣言の
同じ：
(24,19): error: storage size of 'ptMicro24' isn't known
67,5): error: dereferencing pointer to incomplete type
Twi->TWI_CWGR =
error: expected identifier before '(' token
#define TWI_CR_START (0x1u << 0) /**< \brief (TWI_CR) Send a START Condition */
error: expected identifier before '(' token
#define TWI_CR_MSEN (0x1u << 2) /**< \brief (TWI_CR) TWI Master Mode Enabled */
error: expected identifier before '(' token
#define TWI_CR_SVDIS (0x1u << 5) /**< \brief (TWI_CR) TWI Slave Mode Disabled */
error: dereferencing pointer to incomplete type
if (twi_options_t->smbus == 0)
これを使う前に 'struct micro24'を宣言する必要があります（' struct micro24 ptMicro24; '）、'＃include'を忘れましたか？ – purplepsycho
twi_registerと同じです... –