Bugfix: timebase for timer 14 was wrong (base 0 not 1!).

Added command "FTEST" ---> when enabled, the time base is present on PA4 for calibrating external oscillator.

projects/f0-usb-beacon/Inc/command.h

@@ -7,6 +7,8 @@
 void cmd_proc (char *cmd);
 int cmd_isautorun(void);
 void cmd_autorun(int ar);
+uint8_t GetFtestState(void);
+
 
 #endif
 

projects/f0-usb-beacon/Src/command.c

@@ -26,6 +26,8 @@
 
 
 extern settings_t settings;
+static uint8_t ftest = 0;
+
 
 /** Globals */
 static char cmdstr_buf [1 + MAX_CMD_LEN];
@@ -57,6 +59,7 @@ enum
 		CMD_DEL,
 		CMD_ID,
 		CMD_START,
+		CMD_FTEST,
 		// Add more 
 		CMD_LAST
   };
@@ -88,6 +91,7 @@ const char helptext[] =
   " ID ...Text...\n\r"
   " STOP\n\r"
 	" START x\n\r"
+  " FTEST 0|1\n\r"
   "\n\r";
 
 /**
@@ -108,6 +112,7 @@ const struct cmd_st cmd_tbl [] =
 		{ "DEL",  			CMD_DEL,  },
 		{ "ID",   			CMD_ID,  },
 		{ "START",   		CMD_START,  },
+		{ "FTEST",      CMD_FTEST,  },
   };
 
 #define CMD_TBL_LEN (sizeof (cmd_tbl) / sizeof (cmd_tbl [0]))
@@ -126,6 +131,7 @@ void cmd_store(char *argstr_buf, uint8_t del, uint8_t echo);
 void cmd_load(char *argstr_buf);
 void cmd_del(char *argstr_buf);
 void cmd_start(char *argstr_buf);
+void cmd_ftest(char *argstr_buf);
 
 void cmd_unknown(char *argstr_buf);
 
@@ -271,6 +277,10 @@ function invoked here.
 		case CMD_START:
 			cmd_start(argstr_buf);
 		break;
+
+		case CMD_FTEST:
+			cmd_ftest(argstr_buf);
+		break;
 
 		case CMD_LAST:
 			cmd_unknown(cmdstr_buf);
@@ -830,6 +840,76 @@ void cmd_start(char *argstr_buf)
 }
 
 
+/**
+   * @brief Return ftest state 
+   */
+uint8_t GetFtestState(void)
+{
+	return ftest;
+}
+
+
+/**
+   * @brief Init or deinit ftest pin 
+   * @param int 0 or 1
+	 *               0 - enable, 1 - disable 
+   * @retval None
+   */
+void ftestpin(int enable)
+{
+
+	GPIO_InitTypeDef GPIO_InitStruct;
+
+	if (enable>0)
+	{
+		/*Configure GPIO pin : PA4  */
+		GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
+		GPIO_InitStruct.Pull = GPIO_NOPULL;
+		GPIO_InitStruct.Speed = GPIO_SPEED_HIGH;
+		GPIO_InitStruct.Pin = GPIO_PIN_4;
+		HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
+		ftest = 1;
+
+	}
+	else
+	{
+		HAL_GPIO_DeInit(GPIOA, GPIO_PIN_4);
+		ftest = 0;
+	} 
+
+}
+
+
+
+/**
+   * @brief Enable time base (frequency) test on PA4 
+   * @param String 0 or 1
+	 *               0 - enable, 1 - disable 
+   * @retval None
+   */
+void cmd_ftest(char *argstr_buf)
+{
+	int x;
+	char izp[32];
+
+	if ((argstr_buf != NULL) & (strlen(argstr_buf)>0))
+	{		
+    x = atoi(argstr_buf);
+		if ((x>=0) & (x<=1))
+		{
+			ftestpin(x);
+    }
+  }
+	else
+	{
+		snprintf(izp, 32, "FTEST: %d\n\r",GetFtestState());
+		USB_write((uint8_t *)izp, strlen(izp));
+	}
+}
+
+
+
+
 uint8_t selectpins(void)
 {
 	uint8_t sp =0;

projects/f0-usb-beacon/Src/main.c

@@ -267,11 +267,12 @@ void MX_TIM14_Init(void)
 {
 
   htim14.Instance = TIM14;
-  htim14.Init.Prescaler = 48;
+  htim14.Init.Prescaler = 3;
   htim14.Init.CounterMode = TIM_COUNTERMODE_UP;
-  htim14.Init.Period = 1000;
+  htim14.Init.Period = 11999;
   htim14.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
   HAL_TIM_Base_Init(&htim14);
+	HAL_NVIC_SetPriority(TIM14_IRQn, 0, 0);
 
 }
 
@@ -322,7 +323,7 @@ void MX_GPIO_Init(void)
   GPIO_InitStruct.Pull = GPIO_NOPULL;
   GPIO_InitStruct.Speed = GPIO_SPEED_LOW;
   HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
-
+	
 
 }
 

projects/f0-usb-beacon/Src/morse.c

@@ -52,7 +52,7 @@ Morse_Status_t MS;
 
 const morse_t morse_keys[] =
 {
-		{'A', 0xfff9},	/// 	11111111 11111001
+		{'A', 0xfff9},	/// 	11111111 111110011
 		{'B', 0xffe8},	/// 	11111111 11101000
 		{'C', 0xffea},	/// 	11111111 11101010
 		{'D', 0xfff4},	/// 	11111111 11110100
@@ -240,7 +240,7 @@ void Morse_processor(void)
 		MS.timebase++;
 		if (MS.timebase > MS.MPS_pause)
 		{
-		  HAL_TIM_Base_Stop_IT(&htim14);
+		  /////////////////////////////////////////////////HAL_TIM_Base_Stop_IT(&htim14);
 			MS.timebase = 0;
 			MS.duration += MS.MPS_pause;  // message duration
 			switch (MS.MorsePorcessroStage)
@@ -349,7 +349,7 @@ void Morse_processor(void)
 		}  /* if (MS.timebase > MS.MPS_pause)  */
 
   } /*  if (MS.MorsePorcessroStage != MPS_Stop)  */
-		HAL_TIM_Base_Start_IT(&htim14);
+	/////////////////////////////////HAL_TIM_Base_Start_IT(&htim14);
 }
 
 

projects/f0-usb-beacon/Src/stm32f0xx_it.c

@@ -10,6 +10,7 @@
 #include "stm32f0xx_hal.h"
 #include "stm32f0xx.h"
 #include "stm32f0xx_it.h"
+#include "command.h"
 
 /* External variables --------------------------------------------------------*/
 extern PCD_HandleTypeDef hpcd_USB_FS;
@@ -44,6 +45,7 @@ void USB_IRQHandler(void)
   HAL_PCD_IRQHandler(&hpcd_USB_FS);
 }
 
+static GPIO_PinState testpin = GPIO_PIN_RESET;
 
 /**
 * @brief This function handles TIM14 global interrupt.
@@ -52,6 +54,11 @@ void TIM14_IRQHandler(void)
 {
   /* USER CODE BEGIN TIM14_IRQn 0 */
 
+	if (GetFtestState() == 1)
+	{
+	  HAL_GPIO_WritePin(GPIOA,GPIO_PIN_4, testpin);
+	  if (testpin == GPIO_PIN_RESET) testpin = GPIO_PIN_SET; else testpin = GPIO_PIN_RESET;
+	}
   /* USER CODE END TIM14_IRQn 0 */
   HAL_TIM_IRQHandler(&htim14);
   /* USER CODE BEGIN TIM14_IRQn 1 */