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authorXelus22 <17491233+Xelus22@users.noreply.github.com>2020-06-19 22:35:32 +0000
committerGitHub <noreply@github.com>2020-06-20 08:35:32 +1000
commitc7851484457e5ab604962ae7c914b863b8de0cb2 (patch)
treef2fbfc27c8adf8de4a242392ca979561287dc62a
parentb43bdc1c69bb5a57976a159bfc00c4ac1c7c7f8f (diff)
STM32 WS2812 Open Drain Configuration (#9414)
* update docs stm32 only and applies to all 3 driver * cformat
-rw-r--r--docs/ws2812_driver.md11
-rw-r--r--drivers/chibios/ws2812.c10
-rw-r--r--drivers/chibios/ws2812_pwm.c22
-rw-r--r--drivers/chibios/ws2812_spi.c22
4 files changed, 54 insertions, 11 deletions
diff --git a/docs/ws2812_driver.md b/docs/ws2812_driver.md
index 51b053b9b4..fe5f88585a 100644
--- a/docs/ws2812_driver.md
+++ b/docs/ws2812_driver.md
@@ -99,3 +99,14 @@ While not an exhaustive list, the following table provides the scenarios that ha
| f401/f411 | :heavy_check_mark: |
*Other supported ChibiOS boards and/or pins may function, it will be highly chip and configuration dependent.*
+
+### Push Pull and Open Drain Configuration
+The default configuration is a push pull on the defined pin.
+This can be configured for bitbang, PWM and SPI.
+
+Note: This only applies to STM32 boards.
+
+ To configure the `RGB_DI_PIN` to open drain configuration add this to your config.h file:
+```c
+ #define WS2812_EXTERNAL_PULLUP
+```
diff --git a/drivers/chibios/ws2812.c b/drivers/chibios/ws2812.c
index bdca565d88..2c2d9fb2dc 100644
--- a/drivers/chibios/ws2812.c
+++ b/drivers/chibios/ws2812.c
@@ -14,6 +14,14 @@
# endif
#endif
+// Push Pull or Open Drain Configuration
+// Default Push Pull
+#ifndef WS2812_EXTERNAL_PULLUP
+# define WS2812_OUTPUT_MODE PAL_MODE_OUTPUT_PUSHPULL
+#else
+# define WS2812_OUTPUT_MODE PAL_MODE_OUTPUT_OPENDRAIN
+#endif
+
#define NUMBER_NOPS 6
#define CYCLES_PER_SEC (STM32_SYSCLK / NUMBER_NOPS * NOP_FUDGE)
#define NS_PER_SEC (1000000000L) // Note that this has to be SIGNED since we want to be able to check for negative values of derivatives
@@ -66,7 +74,7 @@ void sendByte(uint8_t byte) {
}
}
-void ws2812_init(void) { setPinOutput(RGB_DI_PIN); }
+void ws2812_init(void) { palSetLineMode(RGB_DI_PIN, WS2812_OUTPUT_MODE); }
// Setleds for standard RGB
void ws2812_setleds(LED_TYPE *ledarray, uint16_t leds) {
diff --git a/drivers/chibios/ws2812_pwm.c b/drivers/chibios/ws2812_pwm.c
index 1a17210298..ba45d00425 100644
--- a/drivers/chibios/ws2812_pwm.c
+++ b/drivers/chibios/ws2812_pwm.c
@@ -24,6 +24,22 @@
# define WS2812_DMA_CHANNEL 2 // DMA Channel for TIMx_UP
#endif
+// Push Pull or Open Drain Configuration
+// Default Push Pull
+#ifndef WS2812_EXTERNAL_PULLUP
+# if defined(USE_GPIOV1)
+# define WS2812_OUTPUT_MODE PAL_MODE_STM32_ALTERNATE_PUSHPULL
+# else
+# define WS2812_OUTPUT_MODE PAL_MODE_ALTERNATE(WS2812_PWM_PAL_MODE) | PAL_STM32_OTYPE_PUSHPULL | PAL_STM32_OSPEED_HIGHEST | PAL_STM32_PUPDR_FLOATING
+# endif
+#else
+# if defined(USE_GPIOV1)
+# define WS2812_OUTPUT_MODE PAL_MODE_STM32_ALTERNATE_OPENDRAIN
+# else
+# define WS2812_OUTPUT_MODE PAL_MODE_ALTERNATE(WS2812_PWM_PAL_MODE) | PAL_STM32_OTYPE_OPENDRAIN | PAL_STM32_OSPEED_HIGHEST | PAL_STM32_PUPDR_FLOATING
+# endif
+#endif
+
#ifndef WS2812_PWM_TARGET_PERIOD
//# define WS2812_PWM_TARGET_PERIOD 800000 // Original code is 800k...?
# define WS2812_PWM_TARGET_PERIOD 80000 // TODO: work out why 10x less on f303/f4x1
@@ -142,11 +158,7 @@ void ws2812_init(void) {
for (i = 0; i < WS2812_COLOR_BIT_N; i++) ws2812_frame_buffer[i] = WS2812_DUTYCYCLE_0; // All color bits are zero duty cycle
for (i = 0; i < WS2812_RESET_BIT_N; i++) ws2812_frame_buffer[i + WS2812_COLOR_BIT_N] = 0; // All reset bits are zero
-#if defined(USE_GPIOV1)
- palSetLineMode(RGB_DI_PIN, PAL_MODE_STM32_ALTERNATE_PUSHPULL);
-#else
- palSetLineMode(RGB_DI_PIN, PAL_MODE_ALTERNATE(WS2812_PWM_PAL_MODE) | PAL_STM32_OSPEED_HIGHEST | PAL_STM32_PUPDR_FLOATING);
-#endif
+ palSetLineMode(RGB_DI_PIN, WS2812_OUTPUT_MODE);
// PWM Configuration
//#pragma GCC diagnostic ignored "-Woverride-init" // Turn off override-init warning for this struct. We use the overriding ability to set a "default" channel config
diff --git a/drivers/chibios/ws2812_spi.c b/drivers/chibios/ws2812_spi.c
index 36e08e39ed..3bbada7fef 100644
--- a/drivers/chibios/ws2812_spi.c
+++ b/drivers/chibios/ws2812_spi.c
@@ -16,6 +16,22 @@
# define WS2812_SPI_MOSI_PAL_MODE 5
#endif
+// Push Pull or Open Drain Configuration
+// Default Push Pull
+#ifndef WS2812_EXTERNAL_PULLUP
+# if defined(USE_GPIOV1)
+# define WS2812_OUTPUT_MODE PAL_MODE_STM32_ALTERNATE_PUSHPULL
+# else
+# define WS2812_OUTPUT_MODE PAL_MODE_ALTERNATE(WS2812_SPI_MOSI_PAL_MODE) | PAL_STM32_OTYPE_PUSHPULL
+# endif
+#else
+# if defined(USE_GPIOV1)
+# define WS2812_OUTPUT_MODE PAL_MODE_STM32_ALTERNATE_OPENDRAIN
+# else
+# define WS2812_OUTPUT_MODE PAL_MODE_ALTERNATE(WS2812_SPI_MOSI_PAL_MODE) | PAL_STM32_OTYPE_OPENDRAIN
+# endif
+#endif
+
#define BYTES_FOR_LED_BYTE 4
#define NB_COLORS 3
#define BYTES_FOR_LED (BYTES_FOR_LED_BYTE * NB_COLORS)
@@ -52,11 +68,7 @@ static void set_led_color_rgb(LED_TYPE color, int pos) {
}
void ws2812_init(void) {
-#if defined(USE_GPIOV1)
- palSetLineMode(RGB_DI_PIN, PAL_MODE_STM32_ALTERNATE_PUSHPULL);
-#else
- palSetLineMode(RGB_DI_PIN, PAL_MODE_ALTERNATE(WS2812_SPI_MOSI_PAL_MODE) | PAL_STM32_OTYPE_PUSHPULL);
-#endif
+ palSetLineMode(RGB_DI_PIN, WS2812_OUTPUT_MODE);
// TODO: more dynamic baudrate
static const SPIConfig spicfg = {