[STM32][SPI]移除内部编写的延时函数使用统一延时接口

Author: wdfk-prog

bsp/stm32/libraries/HAL_Drivers/drivers/drv_soft_spi.c

@@ -156,36 +156,6 @@ void stm32_dir_miso(void *data, rt_int32_t state)
     }
 }
 
-static void stm32_udelay(rt_uint32_t us)
-{
-    rt_uint32_t ticks;
-    rt_uint32_t told, tnow, tcnt = 0;
-    rt_uint32_t reload = SysTick->LOAD;
-
-    ticks = us * reload / (1000000UL / RT_TICK_PER_SECOND);
-    told = SysTick->VAL;
-    while (1)
-    {
-        tnow = SysTick->VAL;
-        if (tnow != told)
-        {
-            if (tnow < told)
-            {
-                tcnt += told - tnow;
-            }
-            else
-            {
-                tcnt += reload - tnow + told;
-            }
-            told = tnow;
-            if (tcnt >= ticks)
-            {
-                break;
-            }
-        }
-    }
-}
-
 static void stm32_pin_init(void)
 {
     rt_size_t obj_num = sizeof(spi_obj) / sizeof(struct stm32_soft_spi);
@@ -209,7 +179,7 @@ static struct rt_spi_bit_ops stm32_soft_spi_ops =
         .get_miso = stm32_get_miso,
         .dir_mosi = stm32_dir_mosi,
         .dir_miso = stm32_dir_miso,
-        .udelay = stm32_udelay,
+        .udelay = rt_hw_us_delay,
         .delay_us = 1,
 };