Posted on May 04, 2016 at 16:07Hi to all, i have this shield x-nucleo-6180XA1 with mi STM32L152RE, i setting PB8 and PB9 for I2C1, i want to test the shild i want to see the who i am, i write this easy code
&sharpdefine IDENTIFICATION__MODEL_ID 0x000 //who I am
&sharpdefine PROXW 0x52
&sharpdefine PROXR 0x53
&sharpdefine DEFUALT_ADDR 0X29
void I2C_WHOAMI(I2C_HandleTypeDef *hi2c1, __IO uint8_t whoami){
while((hi2c1->Instance->SR2&BUSY)==BUSY);
// Start
hi2c1->Instance->CR1 |= START;
while((hi2c1->Instance->SR1&SB)!=SB);
dummy16 = hi2c1->Instance->SR1;
hi2c1->Instance->DR = PROXW;
while((hi2c1->Instance->SR1&ADDR)!=ADDR);
dummy16 = hi2c1->Instance->SR1;
dummy16 = hi2c1->Instance->SR2;
while((hi2c1->Instance->SR1&TXE)!=TXE);
hi2c1->Instance->DR = whoami; //WHOAMI;
while((hi2c1->Instance->SR1&(TXE|BTF))!=(TXE|BTF));
// Restart
hi2c1->Instance->CR1 |= START;
while((hi2c1->Instance->SR1&SB)!=SB);
dummy16 = hi2c1->Instance->SR1;
hi2c1->Instance->DR = PROXR;
while((hi2c1->Instance->SR1&ADDR)!=ADDR);
dummy16 = hi2c1->Instance->SR1;
dummy16 = hi2c1->Instance->SR2;
while((hi2c1->Instance->SR1&(RXNE))!=(RXNE));
dummy16 = hi2c1->Instance->DR;
if (dummy16==(uint16_t)180) //0xB4
{
HAL_GPIO_WritePin(LD2_GPIO_Port,LD2_Pin,GPIO_PIN_SET);
while((1));
}
hi2c1->Instance->CR1 |= STOP;
}
in the main.c i have this
// whoami
I2C_WHOAMI(&hi2c1,IDENTIFICATION__MODEL_ID);
i don't see nothing, i use this code with other shield it's work well.
can you help me?
best regards
A.
#nucleo #x-nucleo #i2c
