hubmartin
commented
6 years ago Hello Alex,
it should work :) I too don't think that RTOS could interfere with my driver. What I recall is that I had some issues when the LED strip was too short, it also has to have set even LED count. Try to set WS2812B_NUMBER_OF_LEDS to let say 8 or the original value which is in the example. Also you have to enable clock for GPIOE. In your code you have forget to change GPIOC to GPIOE, unless you enable that clock somewhere else.
define WS2812B_GPIO_CLK_ENABLE() __HAL_RCC_GPIOC_CLK_ENABLE()
Do you have oscilloscope at hand? Do you see some signal on the output or it is completely dead?
Try enabling the clock and let me know. If you have still issues then send me the code/project if its not confidential.
Best regards Martin
On 22 August 2017 at 22:38, Alex Hoffman notifications@github.com wrote:
Hi,
firstly, great library. I'm trying to get it going on an STM32F429ZI that is running FreeRTOS. I have followed your readme and the demo code but I cannot seem to get it going, i'm also quite new to embedded systems so not 100% sure how to check if all the DMA stuff is working etc.
I haven't touched my original config in CUBE which had no timers enabled or DMA stuff added. Looking at the init code it seemed to all get handled by the library. I copied the visInit and visHandle functions from the visEffect example files. I have a single set of 3 LEDS on my gpio PE7 so in the ws2812.h I modified the defines to be as follows:
// GPIO enable command #define WS2812B_GPIO_CLK_ENABLE() __HAL_RCC_GPIOC_CLK_ENABLE() // LED output port #define WS2812B_PORT GPIOE // LED output pins #define WS2812B_PINS (GPIO_PIN_7) //(GPIO_PIN_0 | GPIO_PIN_1 | GPIO_PIN_2 | GPIO_PIN_3) // How many LEDs are in the series - only valid multiples by two #define WS2812B_NUMBER_OF_LEDS 3 #define WS2812_BUFFER_COUNT 1 #define SETPIX_4 // Fastest copying using bit-banding I changed visHandle to:
`void visHandle() {
if(ws2812b.transferComplete) { // Update your framebuffer here or swap buffers
// visHandle2(); visDots(frameBuffer2, sizeof(frameBuffer2), 50, 40);
// Signal that buffer is changed and transfer new data ws2812b.startTransfer = 1; ws2812b_handle(); }
}`
I have a task that is running every 100 miliseconds and running visHandle().
It compiles and runs so I am not sure what I am missing as the setup described in your readme and the example seems very simple.
Any feedback would be great!
Thanks again,
Alex
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alxhoff
Hi,
firstly, great library. I'm trying to get it going on an STM32F429ZI that is running FreeRTOS. I have followed your readme and the demo code but I cannot seem to get it going, i'm also quite new to embedded systems so not 100% sure how to check if all the DMA stuff is working etc.
I haven't touched my original config in CUBE which had no timers enabled or DMA stuff added. Looking at the init code it seemed to all get handled by the library. I copied the visInit and visHandle functions from the visEffect example files. I have a single set of 3 LEDS on my gpio PE7 so in the ws2812.h I modified the defines to be as follows:
`// GPIO enable command
define WS2812B_GPIO_CLK_ENABLE() __HAL_RCC_GPIOC_CLK_ENABLE()
// LED output port
define WS2812B_PORT GPIOE
// LED output pins
define WS2812B_PINS (GPIO_PIN_7) //(GPIO_PIN_0 | GPIO_PIN_1 | GPIO_PIN_2 | GPIO_PIN_3)
// How many LEDs are in the series - only valid multiples by two
define WS2812B_NUMBER_OF_LEDS 3
define WS2812_BUFFER_COUNT 1
define SETPIX_4 // Fastest copying using bit-banding
` I changed visHandle to:
`void visHandle() {
// visHandle2(); visDots(frameBuffer2, sizeof(frameBuffer2), 50, 40);
}`
I have a task that is running every 100 miliseconds and running visHandle().
It compiles and runs so I am not sure what I am missing as the setup described in your readme and the example seems very simple.
Any feedback would be great!
Thanks again,
Alex