Mr max, im trying to follow the I2C register reset, but when i want to send some data to an address (for example address register 8) it gives me on my logic analyzer 0B0001000 + NACK, so i cant send data without the ack bit. do you know what could be possibly the mistake?
Dear Sir,
It is not easy to help you debug the communication of a microcontroller I do not know.
I can only try to give two general suggestions:
- Have you properly set the I2C protocol in the Microcontroller? Speed, Endianess, Start, ACK, Stop times, etc.?
- the I2C packet has to be formed according to the datasheet of the FDA903D if you want a response (page 59)
The packet is 24bits and not 8bits.
Finally, you should already have the source code in AutoDevKit, therefore you can copy from there how to properly prepare the i2C packet.
Mr max , i took the driver and inclluded it to my project, the code i wrote is like this:
my functions:
void AEK_903D_Init()
{
HAL_GPIO_WritePin(GPIOE, GPIO_PIN_8, GPIO_PIN_RESET);
HAL_GPIO_WritePin(GPIOE, GPIO_PIN_10, GPIO_PIN_RESET);
HAL_GPIO_WritePin(GPIOE, GPIO_PIN_12, GPIO_PIN_RESET);
HAL_GPIO_WritePin(GPIOE, GPIO_PIN_14, GPIO_PIN_RESET);
HAL_Delay(500);
HAL_GPIO_WritePin(GPIOE, GPIO_PIN_8, GPIO_PIN_RESET);
HAL_GPIO_WritePin(GPIOE, GPIO_PIN_10, GPIO_PIN_SET);
HAL_GPIO_WritePin(GPIOE, GPIO_PIN_12, GPIO_PIN_RESET);
HAL_GPIO_WritePin(GPIOE, GPIO_PIN_14, GPIO_PIN_RESET); // I2C adress is 0100 = 0xE0
}
uint16_t AEK_903D_SetDefaultRegisters()
{
HAL_StatusTypeDef status;
uint8_t data[15];
uint8_t play = 0B11100001;
// Init: Turn IB registers into application default setting
data[0] = IB0_DEFAULT; // data[0] = 0x00;
data[1] = IB1_DEFAULT; // data[1] = 0x00;
data[2] = IB2_DEFAULT; // data[2] = 0x00;
data[3] = IB3_DEFAULT; // data[3] = 0x38;
data[4] = IB4_DEFAULT; // data[4] = 0x00;
data[5] = IB5_DEFAULT; // data[5] = 0x00;
data[6] = IB6_DEFAULT; // data[6] = 0x00;
data[7] = IB7_DEFAULT; // data[7] = 0x00;
data[8] = IB8_DEFAULT; // data[8] = 0xC0;
data[9] = IB9_DEFAULT; // data[9] = 0x00;
data[10] = IB10_DEFAULT; // data[10] = 0x50;
data[11] = IB11_DEFAULT; // data[11] = 0x30;
data[12] = IB12_DEFAULT; // data[12] = 0x00;
data[13] = IB13_DEFAULT; // data[13] = 0x20;
data[14] = IB14_DEFAULT; // data[14] = 0x09;
//return AEK_903D_Write_IB(dev, IB0, &data[0], 15); // IB14[0] = 1; FIRST bit
status = HAL_I2C_Mem_Write(&hi2c1, 0xE0, IB8, 15, &play, 15, 100); // play is 11100001 which puts PWM on and plays
if(HAL_OK == status)
{
HAL_GPIO_WritePin(GPIOG, GPIO_PIN_13, GPIO_PIN_SET);
return 1;
}
return 0;
}
in my main:
int main(void)
{
/* USER CODE BEGIN 1 */
//findF_Out(1250);
sample_dt = F_OUT/F_SAMPLE;
sample_N = F_SAMPLE/F_OUT;
/* USER CODE END 1 */
/* MCU Configuration--------------------------------------------------------*/
/* Reset of all peripherals, Initializes the Flash interface and the Systick. */
HAL_Init();
/* USER CODE BEGIN Init */
/* USER CODE END Init */
/* Configure the system clock */
SystemClock_Config();
/* USER CODE BEGIN SysInit */
/* USER CODE END SysInit */
/* Initialize all configured peripherals */
MX_GPIO_Init();
MX_DMA_Init();
MX_I2C1_Init();
MX_I2S3_Init();
MX_CAN1_Init();
/* USER CODE BEGIN 2 */
if( HAL_CAN_Start(&hcan1) != HAL_OK)
{
Error_Handler();
}
// CAN notification
if(HAL_CAN_ActivateNotification(&hcan1, CAN_IT_RX_FIFO0_MSG_PENDING) != HAL_OK)
{
Error_Handler();
}
sample_dt = F_OUT/F_SAMPLE;
sample_N = F_SAMPLE/F_OUT;
AEK_903D_Init();
AEK_903D_SetDefaultRegisters();
for(uint16_t i=0; i<sample_N; i++){
mySinVal = sinf(i*2*PI*sample_dt);
dataI2S[i*2]=(mySinVal+0)*8000;
dataI2S[i*2+1]=(mySinVal+0)*8000;
}
HAL_I2S_Transmit_DMA(&hi2s3, (uint16_t *)dataI2S, sample_N*2);
HAL_DAC_Start(&hdac, DAC1_CHANNEL_1);
HAL_TIM_Base_Start_IT(&htim2);
QUESTION 1: is the function that sends play correct?
QUESTION 2: i have error in the last two lines.
