From 4c0f897953aa8d478f3c941e75d3b2eb5611531d Mon Sep 17 00:00:00 2001
From: Jean-François Milants <jf@codingfield.com>
Date: Sun, 7 May 2023 18:24:34 +0200
Subject: Power optimization - Improve SPI sleep mode
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Ensure that all pins are set to their default configuration during sleep mode.
Disable the workaround for FTPAN58 (SPI freezes when transfering a single byte) at the end of the transfer. This disables the resources needed for the workaround.
Those changes reduce the power usage by 430-490µA.
---
 src/drivers/St7789.cpp | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'src/drivers/St7789.cpp')

diff --git a/src/drivers/St7789.cpp b/src/drivers/St7789.cpp
index cfd5bd2c..ed98c06d 100644
--- a/src/drivers/St7789.cpp
+++ b/src/drivers/St7789.cpp
@@ -187,10 +187,13 @@ void St7789::HardwareReset() {
 void St7789::Sleep() {
   SleepIn();
   nrf_gpio_cfg_default(pinDataCommand);
+  nrf_gpio_cfg_default(26);
+  spi.Sleep();
   NRF_LOG_INFO("[LCD] Sleep");
 }
 
 void St7789::Wakeup() {
+  spi.Wakeup();
   nrf_gpio_cfg_output(pinDataCommand);
   SleepOut();
   VerticalScrollStartAddress(verticalScrollingStartAddress);
-- 
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