SPI-Problem mit LTC6803-1 und STM32, LTC lässt sich nicht beschreiben

#include "stm32f1xx_hal.h"

#include "stm32f1xx_hal_conf.h"

RCC_OscInitTypeDef RCC_OscInitStruct;

RCC_ClkInitTypeDef RCC_ClkInitStruct;

GPIO_InitTypeDef GPIO_InitStruct;

SPI_HandleTypeDef hspi1;

uint8_t CRC8_Table[256];    // 8-bit table for PEC calc

void CRC8_Init(void)

{

  uint16_t i, j;

  uint8_t crc;

  for (i = 0; i < 256; i++)

  {

    crc = i;

    for (j = 0; j < 8; j ++)

    {

      crc = (crc << 1) ^ ((crc & 0x80) ? 0x07 : 0);

    }

    CRC8_Table[i] = crc & 0xFF;

  }

}

int main(void)

{

  // Reset of all peripherals, Initializes the Flash interface and the Systick

  HAL_Init();

  // Configure external quarz as clock

  RCC_OscInitTypeDef RCC_OscInitStruct;

  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;

  RCC_OscInitStruct.HSIState = RCC_HSI_ON;

  RCC_OscInitStruct.HSICalibrationValue = 16;

  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;

  RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI_DIV2;

  RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL4;

  HAL_RCC_OscConfig(&RCC_OscInitStruct);

  //-------------------------------------------------------------------

  // Init SPI

  //-------------------------------------------------------------------

  // Peripheral clock enable

  __SPI1_CLK_ENABLE();

  __GPIOA_CLK_ENABLE();

  __GPIOB_CLK_ENABLE();

  hspi1.Instance = SPI1;

  hspi1.Init.Mode = SPI_MODE_MASTER;

  hspi1.Init.Direction = SPI_DIRECTION_2LINES;

  hspi1.Init.DataSize = SPI_DATASIZE_8BIT;

  hspi1.Init.CLKPolarity = SPI_POLARITY_HIGH;

  hspi1.Init.CLKPhase = SPI_PHASE_2EDGE;

  hspi1.Init.NSS = SPI_NSS_SOFT;

  hspi1.Init.BaudRatePrescaler = SPI_BAUDRATEPRESCALER_256;

  hspi1.Init.FirstBit = SPI_FIRSTBIT_MSB;

  hspi1.Init.TIMode = SPI_TIMODE_DISABLED;

  HAL_SPI_Init(&hspi1);

  // SPI1 GPIO Configuration

  // PA5     ------> SPI1_SCK

  // PA6     ------> SPI1_MISO

  // PA7     ------> SPI1_MOSI

  // PB6     ------> SPI_1 CS (LTC6803_CS_PIN)

  GPIO_InitStruct.Pin = GPIO_PIN_5|GPIO_PIN_7;

  GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;

  GPIO_InitStruct.Speed = GPIO_SPEED_HIGH;

  HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

  GPIO_InitStruct.Pin = GPIO_PIN_6;

  GPIO_InitStruct.Mode = GPIO_MODE_INPUT;

  GPIO_InitStruct.Speed = GPIO_SPEED_HIGH;

  GPIO_InitStruct.Pull = GPIO_PULLUP;

  HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

  // set CS to high (disable)

  HAL_GPIO_WritePin(GPIOB, GPIO_PIN_6, GPIO_PIN_SET);

  GPIO_InitStruct.Pin = GPIO_PIN_6;

  GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;

  GPIO_InitStruct.Pull = GPIO_PULLUP;

  GPIO_InitStruct.Speed = GPIO_SPEED_HIGH;

  HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);

  // Calculates the table for PEC data

  CRC8_Init();

  //-------------------------------------------------------------------

  // Write Configuration

  //-------------------------------------------------------------------

  // prepare WRCFG + WRPEC

  uint8_t send_buffer[9] = {0x01, 0xc7}; // WRCFG + WRPEC

  // set CS to low (enable)

  HAL_GPIO_WritePin(GPIOB, GPIO_PIN_6, GPIO_PIN_RESET);

  // send WRCFG + WRPEC

  HAL_SPI_Transmit(&hspi1, send_buffer, 2, 1);

  // prepare CFG1R... + CFGPEC

  send_buffer[0] = 0x11; // CFG1R0

  send_buffer[1] = 0x00; // CFG1R1

  send_buffer[2] = 0x00; // CFG1R2

  send_buffer[3] = 0x00; // CFG1R3

  send_buffer[4] = 0x00; // CFG1R4

  send_buffer[5] = 0x00; // CFG1R5

  send_buffer[6] = 0x3B; // CFGPEC

  // send CFG1R... + CFGPEC

  HAL_SPI_Transmit(&hspi1, send_buffer, 7, 1);

  // set CS to high (disable)

  HAL_GPIO_WritePin(GPIOB, GPIO_PIN_6, GPIO_PIN_SET);

  //-------------------------------------------------------------------

  // Try to read Configuration into receive_Buffer

  //-------------------------------------------------------------------

  // Read LTC6803 configuration

  uint8_t receive_Buffer[7] = { 0 };

  // preapare RDCFG + RCPEC

  send_buffer[0] = 0x02; // RDCFG

  send_buffer[1] = 0xCE; // RCPEC

  send_buffer[2] = 0; // nothing to send, just receive

  send_buffer[3] = 0; // nothing to send, just receive

  send_buffer[4] = 0; // nothing to send, just receive

  send_buffer[5] = 0; // nothing to send, just receive

  send_buffer[6] = 0; // nothing to send, just receive

  // set CS to high (disable)

  HAL_GPIO_WritePin(GPIOB, GPIO_PIN_6, GPIO_PIN_RESET);

  // send RDCFG + RCPEC and receive CFG1R... and CFGPEC

  HAL_SPI_TransmitReceive(&hspi1, send_buffer, receive_Buffer, 9, 1);

  // set CS to high (disable)

  HAL_GPIO_WritePin(GPIOB, GPIO_PIN_6, GPIO_PIN_SET);

  while (1) {}

}