Posted on February 08, 2017 at 11:33Hi all
I followed the post below to setup tlc2543.
http://blog.csdn.net/haozi_1989/article/details/6111776
datasheet
http://www.ti.com/lit/ds/symlink/tlc2543-ep.pdf
Because the STM32L4 series used HAL library not SPL, so I have to modify some codes.
But I still got random voltage values.
Could someone tell me if the modification is right, or how to solve it?
Thank you all in advance.
Here are related codes. SPI2 , PB1 use as CS
uint16_t Read_TLC2543(uint16_t chan)
{
uint8_t data;
uint16_t i,ADCdata;
chan <<= 12;
chan|= 0x0C00;
//GPIO_WriteBit(GPIOA, GPIO_Pin_4, Bit_RESET);
HAL_GPIO_WritePin(GPIOB, GPIO_PIN_1, GPIO_PIN_RESET);
for(i=0;i<2000;i++);//delay
//while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_TXE)==RESET);
while(((hspi2.Instance->SR) & SPI_FLAG_TXE) != SPI_FLAG_TXE) ;
//SPI_I2S_SendData(SPI1,chan);
if(HAL_SPI_Transmit(&hspi2, &chan, 2, 1000) != HAL_OK)
printf('error1\r\n');
//while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_RXNE)==RESET) ;
while(((hspi2.Instance->SR) & SPI_FLAG_RXNE) != SPI_FLAG_RXNE) ;
//ADCdata=SPI_I2S_ReceiveData(SPI1);
if(HAL_SPI_Receive(&hspi2, &ADCdata, 2, 1000) != HAL_OK)
printf('error2\r\n');
for(i=0;i<2000;i++);//delay
ADCdata >>= 4;
//GPIO_WriteBit(GPIOA, GPIO_Pin_4, Bit_SET);
HAL_GPIO_WritePin(GPIOB, GPIO_PIN_1, GPIO_PIN_SET);
return ADCdata;
}
void HAL_SPI_MspInit(SPI_HandleTypeDef* hspi)
{
GPIO_InitTypeDef GPIO_InitStruct;
if(hspi->Instance==SPI2)
{
/* USER CODE BEGIN SPI2_MspInit 0 */
/* USER CODE END SPI2_MspInit 0 */
/* Peripheral clock enable */
__HAL_RCC_SPI2_CLK_ENABLE();
/**SPI2 GPIO Configuration
PB13 ------> SPI2_SCK
PB14 ------> SPI2_MISO
PB15 ------> SPI2_MOSI
*/
/* USER CODE BEGIN SPI2_MspInit 1 */
/* Configure SPI SCK */
GPIO_InitStruct.Pin = GPIO_PIN_13;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_PULLUP;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
GPIO_InitStruct.Alternate = GPIO_AF5_SPI2;
HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
/* Configure SPI MISO and MOSI */
GPIO_InitStruct.Pin = GPIO_PIN_15;
GPIO_InitStruct.Alternate = GPIO_AF5_SPI2;
GPIO_InitStruct.Pull = GPIO_PULLDOWN;
HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
GPIO_InitStruct.Pin = GPIO_PIN_14;
HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
/* USER CODE END SPI2_MspInit 1 */
}
}
static void MX_SPI2_Init(void)
{
hspi2.Instance = SPI2;
hspi2.Init.Mode = SPI_MODE_MASTER;
hspi2.Init.Direction = SPI_DIRECTION_2LINES;
hspi2.Init.DataSize = SPI_DATASIZE_16BIT;
hspi2.Init.CLKPolarity = SPI_POLARITY_LOW;
hspi2.Init.CLKPhase = SPI_PHASE_1EDGE;
hspi2.Init.NSS = SPI_NSS_SOFT;
hspi2.Init.BaudRatePrescaler = SPI_BAUDRATEPRESCALER_256;
hspi2.Init.FirstBit = SPI_FIRSTBIT_MSB;
hspi2.Init.TIMode = SPI_TIMODE_DISABLE;
hspi2.Init.CRCCalculation = SPI_CRCCALCULATION_DISABLE;
hspi2.Init.CRCPolynomial = 7;
hspi2.Init.CRCLength = SPI_CRC_LENGTH_DATASIZE;
hspi2.Init.NSSPMode = SPI_NSS_PULSE_ENABLE;
if (HAL_SPI_Init(&hspi2) != HAL_OK)
{
Error_Handler();
}
}
#stm32l476rg
