From 5c6f049b7cc32f992ba8b5b8fdff681485fe0598 Mon Sep 17 00:00:00 2001
From: Martin Mares <mj@ucw.cz>
Date: Sat, 21 Jul 2018 17:06:40 +0200
Subject: [PATCH] BMP read after each USB update

---
 usb/Inc/app.h    |  1 +
 usb/Src/bmp085.c |  4 ++++
 usb/Src/main.c   | 21 ++++++++++-----------
 3 files changed, 15 insertions(+), 11 deletions(-)

diff --git a/usb/Inc/app.h b/usb/Inc/app.h
index d0061dd..05a96f2 100644
--- a/usb/Inc/app.h
+++ b/usb/Inc/app.h
@@ -16,6 +16,7 @@ void tx_packet_send(void);
 
 // bmp085.c
 
+extern byte bmp_request;
 extern int adjusted_temp;
 extern int adjusted_press;
 extern u32 bmp_counter;
diff --git a/usb/Src/bmp085.c b/usb/Src/bmp085.c
index c5712c9..45039b7 100644
--- a/usb/Src/bmp085.c
+++ b/usb/Src/bmp085.c
@@ -161,6 +161,7 @@ enum bmp_state {
   BMP_PRESSURE,
 };
 
+byte bmp_request;
 static byte bmp_state = BMP_IDLE;
 static u16 raw_temp;
 static u32 raw_press;
@@ -173,6 +174,9 @@ void bmp_step(void)
   switch (bmp_state)
     {
     case BMP_IDLE:
+      if (!bmp_request)
+	return;
+      bmp_request = 0;
       bmp_debug("BMP: Start measure\n");
       bmp_start_measure(0x2e);
       bmp_state++;
diff --git a/usb/Src/main.c b/usb/Src/main.c
index e8d8abb..e934fa9 100644
--- a/usb/Src/main.c
+++ b/usb/Src/main.c
@@ -123,7 +123,7 @@ int main(void)
   MX_USB_PCD_Init();
   MX_TIM4_Init();
   /* USER CODE BEGIN 2 */
-  //display_init();
+  display_init();
   usb_start(&usb);
   bmp_init();
 
@@ -131,12 +131,10 @@ int main(void)
   LL_TIM_EnableIT_UPDATE(TIM4);
   LL_TIM_GenerateEvent_UPDATE(TIM4);
 
-#if 0
   {
     byte buf[5] = { 0xff, 0xff, 10, 0xff, 0xff };
     display_buffer(buf);
   }
-#endif
 
   /* USER CODE END 2 */
 
@@ -146,14 +144,14 @@ int main(void)
   {
     if (rx_packet_state == 1 && !tx_packet_state)
       {
-    static byte led_state;
-    if (led_state)
-      LL_GPIO_SetOutputPin(LED_GPIO_Port, LED_Pin);
-    else
-      LL_GPIO_ResetOutputPin(LED_GPIO_Port, LED_Pin);
-    led_state ^= 1;
-
-	// display_buffer(rx_packet);
+	static byte led_state;
+	if (led_state)
+	  LL_GPIO_SetOutputPin(LED_GPIO_Port, LED_Pin);
+	else
+	  LL_GPIO_ResetOutputPin(LED_GPIO_Port, LED_Pin);
+	led_state ^= 1;
+
+	display_buffer(rx_packet);
 	tx_packet_state = 1;
 	put_u32_be(tx_packet, adjusted_temp);
 	put_u32_be(tx_packet + 4, adjusted_press);
@@ -161,6 +159,7 @@ int main(void)
 	usb_ep_send(&usb, 0x82, tx_packet, 12);
 	rx_packet_state = 0;
 	usb_ep_receive(&usb, 0x01, rx_packet, 64);
+	bmp_request = 1;
       }
 
     bmp_step();
-- 
2.39.5