diff options
author | Andrew Kannan <andrew.kannan@klaviyo.com> | 2018-11-12 19:31:22 -0500 |
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committer | Drashna Jaelre <drashna@live.com> | 2018-11-12 16:31:22 -0800 |
commit | e653cc198e3a535f23ae33d677115f192979ee55 (patch) | |
tree | 5cfd500f945829e3d8dcfaf687940e15f6a93ec4 /keyboards/handwired/practice60/underglow.c | |
parent | 599b21b9f4b450392380870675b136449839f6e5 (diff) |
The "Practice60" Board, Blue Pill powered (#4407)
* Starting point for blue pill based practice60
* Changes
* add
* try raw bin no botloader
* swap back to bootloader version
* edit
* Remove debug LED flash
* Disable JTAG to open up B3 and B4
* Add led backlight support (no breathing yet)
* Update matrix for correctness
* RGB Underglow working in a very simple state
* not as bright
* Move to handwired
* revert ChibiOS_Test changes
* Changes based on PR comments
* Address PR comments v2
* Move files
Diffstat (limited to 'keyboards/handwired/practice60/underglow.c')
-rw-r--r-- | keyboards/handwired/practice60/underglow.c | 157 |
1 files changed, 157 insertions, 0 deletions
diff --git a/keyboards/handwired/practice60/underglow.c b/keyboards/handwired/practice60/underglow.c new file mode 100644 index 0000000000..1383af1898 --- /dev/null +++ b/keyboards/handwired/practice60/underglow.c @@ -0,0 +1,157 @@ +#include "ch.h" +#include "hal.h" + +#include "hsv2rgb.h" +#include "underglow.h" + +#define BYTES_FOR_LED_BYTE 4 +#define NB_COLORS 3 +#define BYTES_FOR_LED BYTES_FOR_LED_BYTE*NB_COLORS +#define DATA_SIZE BYTES_FOR_LED*NB_LEDS +#define RESET_SIZE 200 +#define PREAMBLE_SIZE 4 + +// Define the spi your LEDs are plugged to here +#define LEDS_SPI SPID2 +// Define the number of LEDs you wish to control in your LED strip +#define NB_LEDS 8 + +#define LED_SPIRAL 1 + +static uint8_t txbuf[PREAMBLE_SIZE + DATA_SIZE + RESET_SIZE]; +static uint8_t get_protocol_eq(uint8_t data, int pos); + +/* + * This lib is meant to be used asynchronously, thus the colors contained in + * the txbuf will be sent in loop, so that the colors are always the ones you + * put in the table (the user thus have less to worry about) + * + * Since the data are sent via DMA, and the call to spiSend is a blocking one, + * the processor ressources are not used to much, if you see your program being + * too slow, simply add a: + * chThdSleepMilliseconds(x); + * after the spiSend, where you increment x untill you are satisfied with your + * program speed, another trick may be to lower this thread priority : your call + */ +static THD_WORKING_AREA(LEDS_THREAD_WA, 128); +static THD_FUNCTION(ledsThread, arg) { + (void) arg; + while(1){ + spiSend(&LEDS_SPI, PREAMBLE_SIZE + DATA_SIZE + RESET_SIZE, txbuf); + } +} + +#if LED_SPIRAL +/* + * 'Led spiral' is a simple demo in which we put all the leds to the same + * color, where this color does all the hsv circle in loop. + * If you want to launch the thread that will chage the led colors to the + * appropriate value, simply set LED_SPIRAL to 1. + */ +static THD_WORKING_AREA(HSVTRANS_WA, 128); +static THD_FUNCTION(hsv_transThread, arg){ + (void) arg; + hsv_color color = {0, 255, 127}; + while(1){ + color.h += 1; + color.h %= 256; + set_leds_color_hsv(color); + chThdSleepMilliseconds(50); + } +} +#endif + +static const SPIConfig spicfg = { + NULL, + GPIOB, + 15, + SPI_CR1_BR_1|SPI_CR1_BR_0 // baudrate : fpclk / 8 => 1tick is 0.32us +}; + +/* + * Function used to initialize the driver. + * + * Starts by shutting off all the LEDs. + * Then gets access on the LED_SPI driver. + * May eventually launch an animation on the LEDs (e.g. a thread setting the + * txbuff values) + */ +void leds_init(void){ + for(int i = 0; i < RESET_SIZE; i++) + txbuf[DATA_SIZE+i] = 0x00; + for (int i=0; i<PREAMBLE_SIZE; i++) + txbuf[i] = 0x00; + spiAcquireBus(&LEDS_SPI); /* Acquire ownership of the bus. */ + spiStart(&LEDS_SPI, &spicfg); /* Setup transfer parameters. */ + spiSelect(&LEDS_SPI); /* Slave Select assertion. */ + chThdCreateStatic(LEDS_THREAD_WA, sizeof(LEDS_THREAD_WA),NORMALPRIO, ledsThread, NULL); +#if LED_SPIRAL + chThdCreateStatic(HSVTRANS_WA, sizeof(HSVTRANS_WA), + NORMALPRIO, hsv_transThread, NULL); +#endif +} + +/* + * As the trick here is to use the SPI to send a huge pattern of 0 and 1 to + * the ws2812b protocol, we use this helper function to translate bytes into + * 0s and 1s for the LED (with the appropriate timing). + */ +static uint8_t get_protocol_eq(uint8_t data, int pos){ + uint8_t eq = 0; + if (data & (1 << (2*(3-pos)))) + eq = 0b1110; + else + eq = 0b1000; + if (data & (2 << (2*(3-pos)))) + eq += 0b11100000; + else + eq += 0b10000000; + return eq; +} + +/* + * If you want to set a LED's color in the HSV color space, simply call this + * function with a hsv_color containing the desired color and the index of the + * led on the LED strip (starting from 0, the first one being the closest the + * first plugged to the board) + * + * Only set the color of the LEDs through the functions given by this API + * (unless you really know what you are doing) + */ +void set_led_color_hsv(hsv_color color, int pos){ + set_led_color_rgb(hsv2rgb(color), pos); +} + +/* + * If you want to set a LED's color in the RGB color space, simply call this + * function with a hsv_color containing the desired color and the index of the + * led on the LED strip (starting from 0, the first one being the closest the + * first plugged to the board) + * + * Only set the color of the LEDs through the functions given by this API + * (unless you really know what you are doing) + */ +void set_led_color_rgb(rgb_color color, int pos){ + for(int j = 0; j < 4; j++) + txbuf[PREAMBLE_SIZE + BYTES_FOR_LED*pos + j] = get_protocol_eq(color.g, j); + for(int j = 0; j < 4; j++) + txbuf[PREAMBLE_SIZE + BYTES_FOR_LED*pos + BYTES_FOR_LED_BYTE+j] = get_protocol_eq(color.r, j); + for(int j = 0; j < 4; j++) + txbuf[PREAMBLE_SIZE + BYTES_FOR_LED*pos + BYTES_FOR_LED_BYTE*2+j] = get_protocol_eq(color.b, j); +} + +/* + * Same as the two above, but sets all the LEDs in the LED strip (HSV) + */ +void set_leds_color_hsv(hsv_color color){ + for(int i = 0; i < NB_LEDS; i++) + set_led_color_hsv(color, i); +} + +/* + * Same as the two above, but sets all the LEDs in the LED strip (RGB) + */ +void set_leds_color_rgb(rgb_color color){ + for(int i = 0; i < NB_LEDS; i++) + set_led_color_rgb(color, i); +}
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