Posted on August 29, 2012 at 14:20Hi
I'm trying to write and read data to a m24LR64 eeprom using I2C on STM32f207
I can read data from the eeprom, but when i try to write data to the eeprom, it always writes 0xff og the memory address i'm trying to write.
this is my I2C config:
/* RCC Configuration */
/*I2C Peripheral clock enable */
RCC_APB1PeriphClockCmd(RCC_APB1Periph_I2C2,
ENABLE
);
/*SDA GPIO clock enable */
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOF,
ENABLE
);
/*SCL GPIO clock enable */
//RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOF, ENABLE);
/* Reset I2Cx IP */
RCC_APB1PeriphResetCmd(RCC_APB1Periph_I2C2,
ENABLE
);
/* Release reset signal of I2Cx IP */
RCC_APB1PeriphResetCmd(RCC_APB1Periph_I2C2,
DISABLE
);
/* GPIO Configuration */
/*Configure I2C SCL pin */
GPIO_InitStructure.
GPIO_Pin
= I2C_EEPROM_SCL_PIN;
GPIO_InitStructure.
GPIO_Mode
=
GPIO_Mode_AF
;
GPIO_InitStructure.
GPIO_Speed
=
GPIO_Speed_2MHz
;
GPIO_InitStructure.
GPIO_OType
=
GPIO_OType_OD
;
GPIO_InitStructure.
GPIO_PuPd
=
GPIO_PuPd_NOPULL
;
GPIO_Init(GPIOF, &GPIO_InitStructure);
/*Configure I2C SDA pin */
GPIO_InitStructure.
GPIO_Pin
= I2C_EEPROM_SDA_PIN;
GPIO_Init(GPIOF, &GPIO_InitStructure);
/* Connect PXx to I2C_SCL */
GPIO_PinAFConfig(GPIOF, GPIO_PinSource0, GPIO_AF_I2C2);
/* Connect PXx to I2C_SDA */
GPIO_PinAFConfig(GPIOF, GPIO_PinSource1, GPIO_AF_I2C2);
I2C_DeInit(I2C2);
/*!< I2C
Struct
Initialize */
I2C_InitStructure.
I2C_Mode
= I2C_Mode_I2C;
I2C_InitStructure.
I2C_DutyCycle
= I2C_DutyCycle_2;
I2C_InitStructure.
I2C_OwnAddress1
= 1;
I2C_InitStructure.
I2C_Ack
= I2C_Ack_Enable;
I2C_InitStructure.
I2C_ClockSpeed
= 400000;
I2C_InitStructure.
I2C_AcknowledgedAddress
= I2C_AcknowledgedAddress_7bit;
/* I2C Initialization */
I2C_Init(I2C2, &I2C_InitStructure);
I'm using the STM32_i2c_ee.c function to read and write
status = I2C_EE_PageWrite((
uint8_t
*)data,0x0000,0x04);
I2C_EE_BufferRead((
uint8_t
*) dataRead,0x0000,0x04)
#stm32-i2c-eeprom
