Hi,
I am trying to use an e-paper and a STM32L053C8 microcontroller.
When i use the display in the first cicle, all works fine, but after wake up from stop mode, the display not works. Maybe the SPI interface not start well or i am doing somthing wrong.
This is my first days with this microcontroller and hal programming structure.
Thanks,
Regards,
This is my inicialization code:
/**
* @brief SPI1 Initialization Function
* @param None
* @retval None
*/
static void MX_SPI1_Init(void)
{
/* USER CODE BEGIN SPI1_Init 0 */
/* USER CODE END SPI1_Init 0 */
/* USER CODE BEGIN SPI1_Init 1 */
/* USER CODE END SPI1_Init 1 */
/* SPI1 parameter configuration*/
hspi1.Instance = SPI1;
hspi1.Init.Mode = SPI_MODE_MASTER;
hspi1.Init.Direction = SPI_DIRECTION_1LINE;
hspi1.Init.DataSize = SPI_DATASIZE_8BIT;
hspi1.Init.CLKPolarity = SPI_POLARITY_LOW;
hspi1.Init.CLKPhase = SPI_PHASE_1EDGE;
hspi1.Init.NSS = SPI_NSS_SOFT;
hspi1.Init.BaudRatePrescaler = SPI_BAUDRATEPRESCALER_2;
hspi1.Init.FirstBit = SPI_FIRSTBIT_MSB;
hspi1.Init.TIMode = SPI_TIMODE_DISABLE;
hspi1.Init.CRCCalculation = SPI_CRCCALCULATION_DISABLE;
hspi1.Init.CRCPolynomial = 7;
if (HAL_SPI_Init(&hspi1) != HAL_OK)
{
Error_Handler();
}
/* USER CODE BEGIN SPI1_Init 2 */
/* USER CODE END SPI1_Init 2 */
}
This is the code to entry in stop mode and the next code lines that they are executed:
/* Enter Stop Mode */
__HAL_PWR_CLEAR_FLAG(PWR_FLAG_WU);
HAL_UART_Transmit(&hlpuart1, (uint8_t*)"Sleep mode activated...\r\n", sizeof("Sleep mode activated...\r\n"), 20);
HAL_PWR_EnterSTOPMode(PWR_LOWPOWERREGULATOR_ON, PWR_STOPENTRY_WFI);
/* Configures system clock after wake-up from STOP: enable HSE, PLL and select
PLL as system clock source (HSE and PLL are disabled in STOP mode) */
//HAL_Init();
SystemClock_Config();
MX_GPIO_Init();
MX_ADC_Init();
MX_LPUART1_UART_Init();
MX_USART2_UART_Init();
MX_RTC_Init();
MX_SPI1_Init();
MX_TIM2_Init();
HAL_UART_Transmit(&hlpuart1, (uint8_t*)"Wake-Up...\r\n", sizeof("Wake-Up...\r\n"), 20);
