Other Parts Discussed in Thread: TDC7201, MSP430G2553
Hello, I am trying to configure the TDC1 of TDC7201 on the ZAX EVM Board with STM32F334 controller via SPI protocol.
I believe i have configured everything as explained in the Datasheet. I am still receiving 0x00 from the registers i wrote to.
Does anyone have any idea why this is happening?
1) Set Enable PIN.
// Set the Enable PIN right after power up.
LL_GPIO_ResetOutputPin(GPIOB, LL_GPIO_PIN_ENABLE);
LL_mDelay(5);
LL_GPIO_SetOutputPin(GPIOB, LL_GPIO_PIN_ENABLE);
LL_mDelay(3);
//Set the OSC_Enable pin for internal TDC clock.
LL_GPIO_SetOutputPin(GPIOB, LL_GPIO_PIN_TDC_OSC_ENABLE);
2) SPI CONFIG:
SPI1InitStruct.BaudRate = LL_SPI_BAUDRATEPRESCALER_DIV2; SPI1InitStruct.ClockPhase = LL_SPI_PHASE_2EDGE; SPI1InitStruct.ClockPolarity = LL_SPI_POLARITY_LOW; SPI1InitStruct.CRCCalculation = LL_SPI_CRCCALCULATION_DISABLE; SPI1InitStruct.DataWidth = LL_SPI_DATAWIDTH_8BIT; SPI1InitStruct.TransferDirection = LL_SPI_FULL_DUPLEX; SPI1InitStruct.BitOrder = LL_SPI_MSB_FIRST; SPI1InitStruct.Mode = LL_SPI_MODE_MASTER; SPI1InitStruct.NSS = LL_SPI_NSS_SOFT;
SPI1InitStruct.BaudRate = LL_SPI_BAUDRATEPRESCALER_DIV2; SPI1InitStruct.ClockPhase = LL_SPI_PHASE_2EDGE; SPI1InitStruct.ClockPolarity = LL_SPI_POLARITY_LOW; SPI1InitStruct.CRCCalculation = LL_SPI_CRCCALCULATION_DISABLE; SPI1InitStruct.DataWidth = LL_SPI_DATAWIDTH_8BIT; SPI1InitStruct.TransferDirection = LL_SPI_FULL_DUPLEX; SPI1InitStruct.BitOrder = LL_SPI_MSB_FIRST; SPI1InitStruct.Mode = LL_SPI_MODE_MASTER; SPI1InitStruct.NSS = LL_SPI_NSS_SOFT; LL_SPI_Init(SPI1, &SPI1InitStruct); LL_SPI_SetRxFIFOThreshold(SPI1, LL_SPI_RX_FIFO_TH_QUARTER); LL_SPI_Enable(SPI1);
3) Function: Write Register:
if (!LL_SPI_IsEnabled(SPI1))
{
LL_SPI_Enable(SPI1);
}
uint8_t raddr;
raddr = TDC_WRT_MASK | address; // set addr bits 7 to 0 & 6 to 1 for write.
LL_GPIO_ResetOutputPin(GPIOA, LL_GPIO_PIN_4); // slave select (low)
LL_SPI_TransmitData8(SPI1, raddr); // send reg address.
LL_SPI_TransmitData8(SPI1, value); // send Reg value data.
while (!LL_SPI_IsActiveFlag_TXE(SPI1))
;
while (LL_SPI_IsActiveFlag_BSY(SPI1))
;
LL_GPIO_SetOutputPin(GPIOA, LL_GPIO_PIN_4); // slave deselect (high)
LL_SPI_Disable(SPI1);
4) Function: Read Register:
if (!LL_SPI_IsEnabled(SPI1))
{
LL_SPI_Enable(SPI1);
}
uint8_t data = 0x00;
uint8_t raddr;
raddr = address; // set addr bits 7 & 6 to 0 for read
LL_GPIO_ResetOutputPin(GPIOA, LL_GPIO_PIN_4); // slave select (low)
LL_SPI_TransmitData8(SPI1, raddr);
while (!LL_SPI_IsActiveFlag_TXE(SPI1))
; // wait while not empty
while (LL_SPI_IsActiveFlag_BSY(SPI1))
; // wait while busy,
*(volatile uint8_t*)&SPI1->DR = 0; // dummy write
while (!LL_SPI_IsActiveFlag_RXNE(SPI1))
;
data = LL_SPI_ReceiveData8(SPI1);
LL_GPIO_SetOutputPin(GPIOA, LL_GPIO_PIN_4); // slave select (low)
LL_SPI_Disable(SPI1);
return data;
When i Write and read after write i am getting 0x00.
Image 1: Master Out Slave In (MOSI:Green, SCLK: Pink, Chip Select: Blue)
Image 2: Master In Slave Out (MISO:Green, SCLK: Pink, Chip Select: Blue)
