From d8557e9cb1334d6ecb5659cec3a31a64113afabf Mon Sep 17 00:00:00 2001
From: Patrick Moessler <pub@asaril.de>
Date: Sun, 28 Jan 2024 22:59:40 +0100
Subject: [PATCH] improve timing

---
 components/qspi_74hc595_4x_display/qspi_74hc595_4x_display.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/components/qspi_74hc595_4x_display/qspi_74hc595_4x_display.cpp b/components/qspi_74hc595_4x_display/qspi_74hc595_4x_display.cpp
index c13b294..0bb6efa 100644
--- a/components/qspi_74hc595_4x_display/qspi_74hc595_4x_display.cpp
+++ b/components/qspi_74hc595_4x_display/qspi_74hc595_4x_display.cpp
@@ -154,11 +154,12 @@ void QSPI_74HC595_4X_DISPLAYComponent::display()
     const uint8_t *buf_ptr = reinterpret_cast<const uint8_t *>(this->buffer_);
     for (uint8_t i = 0; i < 8; i++)
     {
+        uint32_t start = micros();
         this->enable();
         this->write_cmd_addr_data(0, 0, 0, 0, buf_ptr, 8, 4);
         buf_ptr += 8;
         this->disable();
-        delay_microseconds_safe(delay);
+        delay_microseconds_safe(delay - (micros() - start));
     }
     // zero out everything to have a somewhat uniform duty cycle for all digits
     this->enable();