From 8d4b4aa7a3615df712b9ed42f358e05dfb9fb3c0 Mon Sep 17 00:00:00 2001
From: Sashka <github@durdom.com>
Date: Fri, 23 Feb 2018 12:29:42 -0500
Subject: [PATCH] Multi-Channel Soft PWM library (#579)
---
.gitmodules | 3 ++
examples/multipwm/Makefile | 4 +++
examples/multipwm/multipwm_test.c | 50 +++++++++++++++++++++++++++++++
extras/multipwm | 1 +
4 files changed, 58 insertions(+)
create mode 100644 examples/multipwm/Makefile
create mode 100644 examples/multipwm/multipwm_test.c
create mode 160000 extras/multipwm
diff --git a/.gitmodules b/.gitmodules
index 6790fd5..2ebfb8a 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -34,3 +34,6 @@
[submodule "extras/libesphttpd/libesphttpd/lib/heatshrink"]
path = extras/libesphttpd/libesphttpd/lib/heatshrink
url = https://github.com/atomicobject/heatshrink
+[submodule "extras/multipwm"]
+ path = extras/multipwm
+ url = https://github.com/nochkin/multipwm
diff --git a/examples/multipwm/Makefile b/examples/multipwm/Makefile
new file mode 100644
index 0000000..4138f8b
--- /dev/null
+++ b/examples/multipwm/Makefile
@@ -0,0 +1,4 @@
+# Simple makefile for multipwm example
+PROGRAM=multipwm_test
+EXTRA_COMPONENTS = extras/multipwm
+include ../../common.mk
diff --git a/examples/multipwm/multipwm_test.c b/examples/multipwm/multipwm_test.c
new file mode 100644
index 0000000..46ddce8
--- /dev/null
+++ b/examples/multipwm/multipwm_test.c
@@ -0,0 +1,50 @@
+/* An example for the multipwm library
+ * Connect LEDs to pins 12, 13, 15 to see the light changes
+ *
+ * Part of esp-open-rtos
+ * Copyright (c) Sashka Nochkin (https://github.com/nochkin)
+ * MIT Licensed
+ */
+
+#include "espressif/esp_common.h"
+#include "esp/uart.h"
+#include "FreeRTOS.h"
+#include "task.h"
+
+#include "multipwm.h"
+
+void multipwm_task(void *pvParameters)
+{
+ uint32_t counts[] = {500, 2100, 3000};
+ int32_t steps[] = {100, 300, 200};
+ uint8_t pins[] = { 12, 13, 15};
+
+ pwm_info_t pwm_info;
+ pwm_info.channels = 3;
+
+ multipwm_init(&pwm_info);
+ for (uint8_t ii=0; ii<pwm_info.channels; ii++) {
+ multipwm_set_pin(&pwm_info, ii, pins[ii]);
+ }
+
+ while(1) {
+ multipwm_stop(&pwm_info);
+ for (uint8_t ii=0; ii<pwm_info.channels; ii++) {
+ multipwm_set_duty(&pwm_info, ii, counts[ii]);
+ counts[ii] += steps[ii];
+ if ((counts[ii] >= 10000) || (counts[ii] == 0)) {
+ steps[ii] = -steps[ii];
+ }
+ }
+ multipwm_start(&pwm_info);
+ vTaskDelay(1);
+ }
+}
+
+void user_init(void)
+{
+ uart_set_baud(0, 115200);
+ printf("SDK version:%s\n", sdk_system_get_sdk_version());
+
+ xTaskCreate(multipwm_task, "multipwm", 256, NULL, 2, NULL);
+}
diff --git a/extras/multipwm b/extras/multipwm
new file mode 160000
index 0000000..44ecea5
--- /dev/null
+++ b/extras/multipwm
@@ -0,0 +1 @@
+Subproject commit 44ecea5757bee0112c65f33eadb44e91a8923535