From 3c9681392ea2c5e13e15c5d94af6590e0ce497eb Mon Sep 17 00:00:00 2001
From: Rutherther <rutherther@ditigal.xyz>
Date: Thu, 19 Dec 2024 10:01:48 +0100
Subject: [PATCH] feat(arm07): use rx not empty as not busy flag

---
 arm07/src/main.c | 40 ++++++----------------------------------
 1 file changed, 6 insertions(+), 34 deletions(-)

diff --git a/arm07/src/main.c b/arm07/src/main.c
index 8a7ea1c..f0ebeef 100644
--- a/arm07/src/main.c
+++ b/arm07/src/main.c
@@ -383,17 +383,12 @@ void main()
     pin_set(&pin_csn);
     pin_into_output_pushpull(&pin_csn);
 
-    timer_init(&spi_csn_timer, TIM4, 4);
-    timer_set_refresh(&spi_csn_timer, 1);
-    timer_configure(&spi_csn_timer, 0, 10000, 0);
-    timer_enable_interrupt(&spi_csn_timer, true, false);
-
     spi_init(&matrix_spi, pin_csn, SPI1, 1);
     spi_master_configure_speed(&matrix_spi, 7);
     spi_master_configure(&matrix_spi, false, false, false,
                          SPI_MSB_FIRST, SPI_FRAME_16_BIT);
 
-    spi_enable_interrupt(&matrix_spi, true, false);
+    spi_enable_interrupt(&matrix_spi, false, true);
     spi_master_enable(&matrix_spi, true);
   }
 
@@ -403,7 +398,6 @@ void main()
     matrix_enable(&matrix, true);
 
     matrix_set_buffer(&matrix, MATRIX_SLOT0, images[current_image]);
-
     timer_init(&matrix_timer, TIM3, 3);
     timer_set_refresh(&matrix_timer, 20);
     timer_configure(&matrix_timer, 0, 60000, 0);
@@ -482,36 +476,14 @@ void TIM3_handler(void) {
 bool spi_can_transmit_flag = true;
 
 void SPI1_handler(void) {
-  /* if (spi_can_receive(&matrix_spi)) { */
-  /*   buffered_transceiver_trigger_receive(&matrix_tx, 1); */
-  /* } */
-  if (spi_can_transmit(&matrix_spi)) {
-    //
-    spi_can_transmit_flag = false;
-    timer_set_counter(&spi_csn_timer, 0);
-    timer_enable(&spi_csn_timer);
-
-    // Disable interrupt so cpu is not locked
-    spi_enable_interrupt(&matrix_spi, false, false);
-  }
-}
-
-void TIM4_handler(void) {
-  timer_clear_update_interrupt(&spi_csn_timer);
+  // using can receive as not busy interrupt
+  if (spi_can_receive(&matrix_spi)) {
+    uint16_t tmp;
+    spi_receive(&matrix_spi, &tmp, 1);
 
-  if (!(matrix_spi.periph->SR & SPI_SR_BSY)) {
-    // puse CSN.
     spi_pulse_csn(&matrix_spi);
-
-    // Allow sending...
     spi_can_transmit_flag = true;
-
-    // Disable this timer until transmission is done again
-    timer_disable(&spi_csn_timer);
-
-    // Transmit only after the pulse. SPI is enabled again.
     buffered_transceiver_trigger_transmit(&matrix_tx, 1);
-
   }
 }
 
@@ -541,7 +513,7 @@ uint16_t spi_generic_receive(void *peripheral, void *buffer,
 uint16_t spi_generic_transmit(void *peripheral, void *data, uint16_t size) {
   // enable the interrupt so that we can send the rest
   uint16_t ret = spi_transmit((spi_t*)peripheral, data, size);
-  spi_enable_interrupt((spi_t*)peripheral, true, false);
+  spi_can_transmit_flag = false;
   return ret;
 }
 
-- 
2.48.1