From 1ec0c55a233f797caa832811ae1c83abdd6f663b Mon Sep 17 00:00:00 2001
From: Jan-Henrik Bruhn <hi@jhbruhn.de>
Date: Sat, 18 Apr 2020 00:58:45 +0200
Subject: [PATCH] Fix SPI Display transmission bug

---
 midi2cv/drivers/base_display.cc | 3 +--
 midi2cv/makefile                | 1 +
 midi2cv/midi2cv.cc              | 6 +++---
 3 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/midi2cv/drivers/base_display.cc b/midi2cv/drivers/base_display.cc
index 7b48667..485430f 100644
--- a/midi2cv/drivers/base_display.cc
+++ b/midi2cv/drivers/base_display.cc
@@ -21,8 +21,7 @@ uint8_t u8x8_byte_4wire_stm32_spi(u8x8_t* u8x8, uint8_t msg, uint8_t arg_int,
   uint8_t* data = (uint8_t*)arg_ptr;
   switch (msg) {
   case U8X8_MSG_BYTE_SEND:
-
-    HAL_SPI_Transmit(&hspi2, data, arg_int, 0);
+    HAL_SPI_Transmit(&hspi2, data, arg_int, HAL_MAX_DELAY);
     break;
   case U8X8_MSG_BYTE_INIT:
     break;
diff --git a/midi2cv/makefile b/midi2cv/makefile
index b7b3598..15aba1c 100644
--- a/midi2cv/makefile
+++ b/midi2cv/makefile
@@ -33,6 +33,7 @@ U8G2              = enabled
 PRINTF_FLOATS     = enabled
 APPLICATION_LARGE = TRUE
 BOOTLOADER        = midi2cv_bootloader
+#OPTIMIZE          = TRUE
 
 # Preferred upload command
 UPLOAD_COMMAND  = upload_combo_jtag
diff --git a/midi2cv/midi2cv.cc b/midi2cv/midi2cv.cc
index 5df6a48..99d1c70 100644
--- a/midi2cv/midi2cv.cc
+++ b/midi2cv/midi2cv.cc
@@ -118,8 +118,8 @@ void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef* htim)
 
   static uint16_t count = 0;
   count++;
-  if (count % (8000L / 24) == 0) {
-    // refresh display with 24fps
+  if (count % (8000L / 20) == 0) {
+    // refresh display with 20fps
     ui.Flush();
     count = 0;
   }
@@ -164,9 +164,9 @@ void Init(void)
 
 int main(void)
 {
+  HAL_DeInit();
   SystemInit();
   SCB->VTOR = 0x8000;
-  HAL_DeInit();
   HAL_Init();
   __HAL_RCC_SYSCFG_CLK_ENABLE();
   __HAL_RCC_PWR_CLK_ENABLE();