Posted on July 03, 2018 at 17:03I cannot communicate my mpu6050 with nucleo-F103RB board via I2C interface. Here is my code, maybe someone could explain me what is wrong.
&sharpinclude 'stm32f1xx.h'
I2C_HandleTypeDef hi2c;
UART_HandleTypeDef uart;
void send_char(char c)
{
HAL_UART_Transmit(&uart, (uint8_t*)&c, 1, 1000);
}
int __io_putchar(int ch)
{
if (ch == '\n')
send_char('\r');
send_char(ch);
return ch;
}
int main(void)
{
uint8_t who_i_am=1;
SystemCoreClock = 8000000;
HAL_Init();
__HAL_RCC_GPIOA_CLK_ENABLE();
__HAL_RCC_GPIOB_CLK_ENABLE();
__HAL_RCC_USART2_CLK_ENABLE();
__HAL_RCC_I2C1_CLK_ENABLE();
GPIO_InitTypeDef gpio;
gpio.Mode = GPIO_MODE_AF_OD;
gpio.Pin = GPIO_PIN_6 | GPIO_PIN_7; // SCL, SDA
gpio.Pull = GPIO_PULLUP;
gpio.Speed = GPIO_SPEED_FREQ_HIGH;
HAL_GPIO_Init(GPIOB, &gpio);
gpio.Mode = GPIO_MODE_AF_PP;
gpio.Pin = GPIO_PIN_2;
gpio.Pull = GPIO_NOPULL;
gpio.Speed = GPIO_SPEED_FREQ_LOW;
HAL_GPIO_Init(GPIOA, &gpio);
gpio.Mode = GPIO_MODE_AF_INPUT;
gpio.Pin = GPIO_PIN_3;
HAL_GPIO_Init(GPIOA, &gpio);
hi2c.Instance = I2C1;
hi2c.Init.ClockSpeed = 100000;
hi2c.Init.DutyCycle = I2C_DUTYCYCLE_2;
hi2c.Init.OwnAddress1 = 0xff;
hi2c.Init.AddressingMode = I2C_ADDRESSINGMODE_7BIT;
hi2c.Init.DualAddressMode = I2C_DUALADDRESS_DISABLE;
hi2c.Init.OwnAddress2 = 0xff;
hi2c.Init.GeneralCallMode = I2C_GENERALCALL_DISABLE;
hi2c.Init.NoStretchMode = I2C_NOSTRETCH_DISABLE;
HAL_I2C_Init(&hi2c);
uart.Instance = USART2;
uart.Init.BaudRate = 9600;
uart.Init.WordLength = UART_WORDLENGTH_8B;
uart.Init.Parity = UART_PARITY_NONE;
uart.Init.StopBits = UART_STOPBITS_1;
uart.Init.HwFlowCtl = UART_HWCONTROL_NONE;
uart.Init.OverSampling = UART_OVERSAMPLING_16;
uart.Init.Mode = UART_MODE_TX_RX;
HAL_UART_Init(&uart);
HAL_I2C_Mem_Read(&hi2c, 0x68, 0x75, 1, (uint8_t*)&who_i_am, sizeof(who_i_am), 1000);
printf('who i am = %d\n',who_i_am);
while (1) {
}
}
#stm32l-i2c #i2c-isues #nucleo-f103rb #i2c-issue #stm32f103-hal
