From 5cd3bd5c4be0d1a63ed45c2dc0499b98daa1a89f Mon Sep 17 00:00:00 2001
From: Jeroen Domburg <git@j0h.nl>
Date: Sat, 8 Oct 2016 13:15:06 +0800
Subject: [PATCH] Add data memory for RMT peripheral

---
 components/esp32/include/soc/rmt_struct.h | 18 ++++++++++++++++++
 components/esp32/ld/esp32.peripherals.ld  |  1 +
 2 files changed, 19 insertions(+)

diff --git a/components/esp32/include/soc/rmt_struct.h b/components/esp32/include/soc/rmt_struct.h
index 15beb8c6d6..fb4c21055e 100644
--- a/components/esp32/include/soc/rmt_struct.h
+++ b/components/esp32/include/soc/rmt_struct.h
@@ -225,4 +225,22 @@ typedef volatile struct {
     uint32_t date;                                      /*This is the version register.*/
 } rmt_dev_t;
 extern rmt_dev_t RMT;
+
+//Allow access to RMT memory using RMTMEM.chan[0].data[8]
+typedef volatile struct {
+    struct {
+        union {
+            struct {
+                uint32_t level1:       1;
+                uint32_t duration1:    15;
+                uint32_t level0:       1;
+                uint32_t duration0:    15;
+
+            };
+            uint32_t val;
+        } data[64];
+    } chan[8];
+} rmt_mem_t;
+extern rmt_mem_t RMTMEM;
+
 #endif  /* _SOC_RMT_STRUCT_H_ */
diff --git a/components/esp32/ld/esp32.peripherals.ld b/components/esp32/ld/esp32.peripherals.ld
index aaadedce49..95aaadcbcc 100644
--- a/components/esp32/ld/esp32.peripherals.ld
+++ b/components/esp32/ld/esp32.peripherals.ld
@@ -9,6 +9,7 @@ PROVIDE ( UART1 = 0x3ff50000 );
 PROVIDE ( I2C0 = 0x3ff53000 );
 PROVIDE ( UHCI0 = 0x3ff54000 );
 PROVIDE ( RMT = 0x3ff56000 );
+PROVIDE ( RMTMEM = 0x3ff56800 );
 PROVIDE ( PCNT = 0x3ff57000 );
 PROVIDE ( LEDC = 0x3ff59000 );
 PROVIDE ( TIMERG0 = 0x3ff5F000 );