[drv_spi.c] 修复 stm32 drv_spi.c文件中的 spixfer 未实现片选为高电平的 spi 设备

Author: liukangcc

bsp/stm32/libraries/HAL_Drivers/drv_spi.c

@@ -293,7 +293,10 @@ static rt_uint32_t spixfer(struct rt_spi_device *device, struct rt_spi_message *
 
     if (message->cs_take && !(device->config.mode & RT_SPI_NO_CS))
     {
-        HAL_GPIO_WritePin(cs->GPIOx, cs->GPIO_Pin, GPIO_PIN_RESET);
+        if(device->config.mode & RT_SPI_CS_HIGH)
+            HAL_GPIO_WritePin(cs->GPIOx, cs->GPIO_Pin, GPIO_PIN_SET);
+	    else
+            HAL_GPIO_WritePin(cs->GPIOx, cs->GPIO_Pin, GPIO_PIN_RESET);
     }
 
     LOG_D("%s transfer prepare and start", spi_drv->config->bus_name);
@@ -387,7 +390,10 @@ static rt_uint32_t spixfer(struct rt_spi_device *device, struct rt_spi_message *
 
     if (message->cs_release && !(device->config.mode & RT_SPI_NO_CS))
     {
-        HAL_GPIO_WritePin(cs->GPIOx, cs->GPIO_Pin, GPIO_PIN_SET);
+        if(device->config.mode & RT_SPI_CS_HIGH)
+            HAL_GPIO_WritePin(cs->GPIOx, cs->GPIO_Pin, GPIO_PIN_RESET);
+        else
+            HAL_GPIO_WritePin(cs->GPIOx, cs->GPIO_Pin, GPIO_PIN_SET);
     }
 
     return message->length;