🐞 fix:优化串口初始化速度（中微厂家更改）

Firmware/Source/Device/Cmsemicon/BAT32A239/Library/Driver/src/sci_common.c

@@ -103,7 +103,96 @@ void sci_error_log_internal(int8_t err, const char *file, int32_t line)
         /* Do nothing. */
     }
 }
+#if 1
+/**
+  * @brief  Calculate the register setting options for baud rate to UART peripheral.
+  * @param  fclk_freq: System clock value on chip.
+  * @param  baud: The target baud rate which want to setting.
+  * @param  pValue: UART baud rate setting option data structure.
+  * @param 	cur_sps: current SPS register value, clock sharing it with other channels,  Try not to modify it as much as possible.
+  * 				 if 'cur_sps = 0x00' or 'cur_sps = FORCE_RECONF', Ignore the original register value and force reconfiguration.			laidi
+  * @retval None
+  */
+float SCIPeriphal_ClockUpdate(SCIAFSelect_TypeDef func, uint32_t fclk, uint32_t ftclk, uint8_t cur_sps, SCIPeriph_Clock_TypeDef *clock)
+{
+#define CALCULATE_MAX_SPS		0x0F
+#define CALCULATE_MAX_SDR		0x7F
+#define FORCE_RECONF  			0xFF
+	uint8_t i;
+	uint8_t min_sdr, max_sps;
+	uint32_t cal_fmck = 0;
+	int16_t idea_sdr;
+	uint8_t sdr_int;
+	uint16_t max_err = 0xFFFF, temp_err = 0xFFFF;
+	float ret_err = 100.0;
+	
+	if(ftclk == 0)
+	{
+		return ret_err;
+	}
 
+	if (func & SCI_UART_MASK)
+	{
+		min_sdr = 2;
+	}
+	else if (func & SCI_I2C_MASK)
+	{
+		min_sdr = 1;
+	}
+	else
+	{
+		min_sdr = 0;
+	}
+
+	if ((cur_sps == 0x00) || (cur_sps == FORCE_RECONF))
+	{
+		max_sps = CALCULATE_MAX_SPS + 1;
+	}
+	else
+	{
+		clock->sps = cur_sps;
+		max_sps = 1;		/* for (i..) loop once */
+	}
+
+  for (i = 0; i < max_sps; i++)
+  {
+		/* cac fMCK, SPS reg*/
+		if ((cur_sps == 0x00) || (cur_sps == FORCE_RECONF))
+		{
+			cal_fmck = fclk / sps_tab[i];
+		}
+		else
+		{
+			i = cur_sps;
+			cal_fmck = fclk / sps_tab[cur_sps];
+		}
+
+		/* cal_ftclk = cal_fmck /2 /(SDR[15:9]+1), data scaled up 100 times for calculations.*/
+		idea_sdr = ((cal_fmck >> 1) *100) / ftclk;
+		if((idea_sdr > (min_sdr*100 +50)) && (idea_sdr < (CALCULATE_MAX_SDR*100 +50)))
+		{
+			sdr_int = (idea_sdr + 50)/100;
+			temp_err = abs((sdr_int * 100) - idea_sdr) * 10000 / idea_sdr;
+			
+			if(temp_err < max_err)
+			{
+				clock->sps = i;
+				clock->sdr = sdr_int - 1;
+				max_err = temp_err;
+			}
+			if(max_err == 0)
+			{
+				return (float)0.0;
+			}
+		}
+	}
+
+	ret_err = max_err /(float)100.0;
+	return ret_err;
+}
+#endif
+
+#if 0
 /**
   * @brief  Calculate the register setting options for baud rate to UART peripheral.
   * @param  fclk_freq: System clock value on chip.
@@ -167,6 +256,7 @@ float SCIPeriphal_ClockUpdate(SCIAFSelect_TypeDef func, uint32_t fclk, uint32_t
 	return max_err;
 }
 
+#endif
 /**
   * @brief  This function is aimed to check sci unit and its channel is used or not  
   * @param  func: The AF function for SCI channel periphal.

[陈家乐]

62938 【天鹰TY200】【TCS外发】重新上大电，TCS外发前22帧发无效值，从第23帧开始发正确值