From dd05550cc5467f864f6ec23fe899bc8a69632052 Mon Sep 17 00:00:00 2001
From: mrfaptastic <12006953+mrfaptastic@users.noreply.github.com>
Date: Wed, 29 Sep 2021 23:20:16 +0100
Subject: [PATCH] Remove ESP32C3 experimental stuff.

ESP32-C3 doesn't actually support 'lcd mode' aka. parallel DMA, so it'll never be of use with this library and a HUB75 panel.
---
 ESP32-HUB75-MatrixPanel-I2S-DMA.h             |  6 ++++
 esp32_i2s_parallel_dma.c                      | 35 +++----------------
 esp32_i2s_parallel_dma.h                      |  6 +++-
 ..._cxxx.c => esp32_i2s_parallel_dma_cxxx.txt |  2 ++
 esp32_i2s_parallel_mcu_def.h                  | 18 +++++-----
 5 files changed, 25 insertions(+), 42 deletions(-)
 rename esp32_i2s_parallel_dma_cxxx.c => esp32_i2s_parallel_dma_cxxx.txt (99%)

diff --git a/ESP32-HUB75-MatrixPanel-I2S-DMA.h b/ESP32-HUB75-MatrixPanel-I2S-DMA.h
index 8d1c0a9..c68a634 100644
--- a/ESP32-HUB75-MatrixPanel-I2S-DMA.h
+++ b/ESP32-HUB75-MatrixPanel-I2S-DMA.h
@@ -4,6 +4,12 @@
 /* Core ESP32 hardware / idf includes!                                                 */
 #include <vector>
 #include <memory>
+
+#include "freertos/FreeRTOS.h"
+#include "freertos/task.h"
+#include "freertos/semphr.h"
+#include "freertos/queue.h"
+
 #include "esp_heap_caps.h"
 #include "esp32_i2s_parallel_dma.h"
 
diff --git a/esp32_i2s_parallel_dma.c b/esp32_i2s_parallel_dma.c
index 6797733..ea560b1 100644
--- a/esp32_i2s_parallel_dma.c
+++ b/esp32_i2s_parallel_dma.c
@@ -14,40 +14,16 @@
 // Header
 #include "esp32_i2s_parallel_dma.h" 
 
-#if defined(ESP32_ORIG) || defined (ESP32_SXXX)
+#include <stdbool.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
 
-
-#include <esp_err.h>
- 
- // Turn on and off a periphal
-#include <driver/periph_ctrl.h>
-
-// GPIO
-#include <soc/gpio_periph.h>
-#include <hal/gpio_types.h>
 #include <driver/gpio.h>
 #include <driver/periph_ctrl.h>
-
 #include <rom/gpio.h>
 #include <soc/gpio_sig_map.h>
 
-// DMA Linked List Struct
-#include <soc/lldesc.h>
-#include <soc/io_mux_reg.h>
-
-// I2S
-#include <soc/i2s_struct.h>
-#include <soc/i2s_reg.h>
-
-
-#ifdef ESP32_CXXX
-	// GDMA
-	#include <soc/gdma_channel.h>
-	#include <soc/gdma_periph.h>
-	#include <soc/gdma_reg.h>
-	#include <soc/gdma_struct.h>
-#endif
-
 // For I2S state management.
 static i2s_parallel_state_t *i2s_state 	= NULL;
 
@@ -448,6 +424,3 @@ void i2s_parallel_flip_to_buffer(i2s_port_t port, int buffer_id) {
 bool i2s_parallel_is_previous_buffer_free() {
     return previousBufferFree;
 }
-
-// End ESP32 original / S2, S3 check
-#endif
\ No newline at end of file
diff --git a/esp32_i2s_parallel_dma.h b/esp32_i2s_parallel_dma.h
index 00e6097..2b16e24 100644
--- a/esp32_i2s_parallel_dma.h
+++ b/esp32_i2s_parallel_dma.h
@@ -13,8 +13,12 @@
 extern "C" {
 #endif
 
-#include <esp_err.h>
+#include <stdbool.h>
+#include <sys/types.h>
+
+#include <freertos/FreeRTOS.h>
 #include <driver/i2s.h>
+#include <esp_err.h>
 #include <rom/lldesc.h>
 
 // Get MCU Type and Max CLK Hz for MCU
diff --git a/esp32_i2s_parallel_dma_cxxx.c b/esp32_i2s_parallel_dma_cxxx.txt
similarity index 99%
rename from esp32_i2s_parallel_dma_cxxx.c
rename to esp32_i2s_parallel_dma_cxxx.txt
index f8d8702..8e39820 100644
--- a/esp32_i2s_parallel_dma_cxxx.c
+++ b/esp32_i2s_parallel_dma_cxxx.txt
@@ -4,6 +4,8 @@
  * Author:      Mrfaptastic @ https://github.com/mrfaptastic/
  * 
  * Description: Multi-ESP32 product DMA setup functions for ESP32 C3/H2 RISC-V chips
+ * 
+ * ESP32C series doesn't support LCD mode / parallel DMA! 
  *
  */
 
diff --git a/esp32_i2s_parallel_mcu_def.h b/esp32_i2s_parallel_mcu_def.h
index 199d8fa..4ab524e 100644
--- a/esp32_i2s_parallel_mcu_def.h
+++ b/esp32_i2s_parallel_mcu_def.h
@@ -10,17 +10,10 @@
 #if CONFIG_IDF_TARGET_ESP32S2 || CONFIG_IDF_TARGET_ESP32S3
 
 	#define ESP32_SXXX 1
-	
+		
 	#define I2S_PARALLEL_CLOCK_HZ 160000000L
 	#define DMA_MAX (4096-4)
-	
-#elif CONFIG_IDF_TARGET_ESP32C3 || CONFIG_IDF_TARGET_ESP32H2
 
-	#define ESP32_CXXX 1
-	
-	#define I2S_PARALLEL_CLOCK_HZ 160000000L
-	#define DMA_MAX (4096-4)
-	
 #elif CONFIG_IDF_TARGET_ESP32 || defined(ESP32)
 
 	// 2016 model that started it all, and this library. The best.
@@ -29,7 +22,12 @@
 	#define I2S_PARALLEL_CLOCK_HZ 80000000L
 	#define DMA_MAX (4096-4)
 	
+#elif CONFIG_IDF_TARGET_ESP32C3 || CONFIG_IDF_TARGET_ESP32H2
+
+	#error "ESPC-series RISC-V MCU's do not support parallel DMA and not supported by this library!"
+	#define ESP32_CXXX 1
+
 #else
-	#error "No ESP32 or ESP32 Espressif IDF compile-time defines detected. WTH!?"
-	
+	#error "ERROR: No ESP32 or ESP32 Espressif IDF detected at compile time."
+
 #endif
\ No newline at end of file