From 9fd9dd85e3a157bed74f4ce4b6120433b2983be8 Mon Sep 17 00:00:00 2001
From: Skorpionm <85568270+Skorpionm@users.noreply.github.com>
Date: Wed, 2 Aug 2023 08:45:39 +0400
Subject: [PATCH] =?UTF-8?q?SubGhz:=20change=20CC1101=5Fext=20TIM17=20resol?=
 =?UTF-8?q?ution=20to=202=C2=B5s=20(#2909)?=
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* SubGhz: change the operation of the TIM17 timer in CC1101_ext to 2µs
* SubGhz: remove special characters

Co-authored-by: あく <alleteam@gmail.com>
---
 .../drivers/subghz/cc1101_ext/cc1101_ext.c       | 16 +++++++++-------
 1 file changed, 9 insertions(+), 7 deletions(-)

diff --git a/applications/drivers/subghz/cc1101_ext/cc1101_ext.c b/applications/drivers/subghz/cc1101_ext/cc1101_ext.c
index 594a74a0..e9560ce5 100644
--- a/applications/drivers/subghz/cc1101_ext/cc1101_ext.c
+++ b/applications/drivers/subghz/cc1101_ext/cc1101_ext.c
@@ -37,7 +37,7 @@
 #define SUBGHZ_DEVICE_CC1101_EXT_ASYNC_TX_BUFFER_FULL (256)
 #define SUBGHZ_DEVICE_CC1101_EXT_ASYNC_TX_BUFFER_HALF \
     (SUBGHZ_DEVICE_CC1101_EXT_ASYNC_TX_BUFFER_FULL / 2)
-#define SUBGHZ_DEVICE_CC1101_EXT_ASYNC_TX_GUARD_TIME 999
+#define SUBGHZ_DEVICE_CC1101_EXT_ASYNC_TX_GUARD_TIME 999 << 1
 
 /** SubGhz state */
 typedef enum {
@@ -483,7 +483,7 @@ static void subghz_device_cc1101_ext_capture_ISR() {
 
             subghz_device_cc1101_ext->async_rx.capture_callback(
                 true,
-                LL_TIM_GetCounter(TIM17),
+                LL_TIM_GetCounter(TIM17) << 1,
                 (void*)subghz_device_cc1101_ext->async_rx.capture_callback_context);
         }
     } else {
@@ -493,11 +493,11 @@ static void subghz_device_cc1101_ext_capture_ISR() {
 
             subghz_device_cc1101_ext->async_rx.capture_callback(
                 false,
-                LL_TIM_GetCounter(TIM17),
+                LL_TIM_GetCounter(TIM17) << 1,
                 (void*)subghz_device_cc1101_ext->async_rx.capture_callback_context);
         }
     }
-    LL_TIM_SetCounter(TIM17, 6);
+    LL_TIM_SetCounter(TIM17, 4); //8>>1
 }
 
 void subghz_device_cc1101_ext_start_async_rx(
@@ -512,7 +512,8 @@ void subghz_device_cc1101_ext_start_async_rx(
     furi_hal_bus_enable(FuriHalBusTIM17);
 
     // Configure TIM
-    LL_TIM_SetPrescaler(TIM17, 64 - 1);
+    //Set the timer resolution to 2 us
+    LL_TIM_SetPrescaler(TIM17, (64 << 1) - 1);
     LL_TIM_SetCounterMode(TIM17, LL_TIM_COUNTERMODE_UP);
     LL_TIM_SetAutoReload(TIM17, 0xFFFF);
     LL_TIM_SetClockDivision(TIM17, LL_TIM_CLOCKDIVISION_DIV1);
@@ -606,7 +607,7 @@ static void subghz_device_cc1101_ext_async_tx_refill(uint32_t* buffer, size_t sa
 
             uint32_t duration = level_duration_get_duration(ld);
             furi_assert(duration > 0);
-            *buffer = duration - 1;
+            *buffer = duration >> 1;
             buffer++;
             samples--;
         }
@@ -692,7 +693,8 @@ bool subghz_device_cc1101_ext_start_async_tx(SubGhzDeviceCC1101ExtCallback callb
     furi_hal_bus_enable(FuriHalBusTIM17);
 
     // Configure TIM
-    LL_TIM_SetPrescaler(TIM17, 64 - 1);
+    // Set the timer resolution to 2 us
+    LL_TIM_SetPrescaler(TIM17, (64 << 1) - 1);
     LL_TIM_SetCounterMode(TIM17, LL_TIM_COUNTERMODE_UP);
     LL_TIM_SetAutoReload(TIM17, 0xFFFF);
     LL_TIM_SetClockDivision(TIM17, LL_TIM_CLOCKDIVISION_DIV1);