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authorJoel Challis <git@zvecr.com>2020-03-21 05:20:04 +0000
committerGitHub <noreply@github.com>2020-03-21 16:20:04 +1100
commitd96380e65496912e0f68e6531565f4b45efd1623 (patch)
tree63e903f65b4fdc44c75c7eff21e076fdb200dca7 /drivers/arm/ws2812.c
parent7e80686f1e400010a8a800cc73c4896936f337de (diff)
downloadqmk_firmware-d96380e65496912e0f68e6531565f4b45efd1623.tar.gz
qmk_firmware-d96380e65496912e0f68e6531565f4b45efd1623.zip
Initial arm->chibios pass - simplify some platform logic (#8450)
Diffstat (limited to 'drivers/arm/ws2812.c')
-rw-r--r--drivers/arm/ws2812.c95
1 files changed, 0 insertions, 95 deletions
diff --git a/drivers/arm/ws2812.c b/drivers/arm/ws2812.c
deleted file mode 100644
index bdca565d88..0000000000
--- a/drivers/arm/ws2812.c
+++ /dev/null
@@ -1,95 +0,0 @@
-#include "quantum.h"
-#include "ws2812.h"
-#include "ch.h"
-#include "hal.h"
-
-/* Adapted from https://github.com/bigjosh/SimpleNeoPixelDemo/ */
-
-#ifndef NOP_FUDGE
-# if defined(STM32F0XX) || defined(STM32F1XX) || defined(STM32F3XX) || defined(STM32F4XX) || defined(STM32L0XX)
-# define NOP_FUDGE 0.4
-# else
-# error("NOP_FUDGE configuration required")
-# define NOP_FUDGE 1 // this just pleases the compile so the above error is easier to spot
-# endif
-#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
-#define NS_PER_CYCLE (NS_PER_SEC / CYCLES_PER_SEC)
-#define NS_TO_CYCLES(n) ((n) / NS_PER_CYCLE)
-
-#define wait_ns(x) \
- do { \
- for (int i = 0; i < NS_TO_CYCLES(x); i++) { \
- __asm__ volatile("nop\n\t" \
- "nop\n\t" \
- "nop\n\t" \
- "nop\n\t" \
- "nop\n\t" \
- "nop\n\t"); \
- } \
- } while (0)
-
-// These are the timing constraints taken mostly from the WS2812 datasheets
-// These are chosen to be conservative and avoid problems rather than for maximum throughput
-
-#define T1H 900 // Width of a 1 bit in ns
-#define T1L (1250 - T1H) // Width of a 1 bit in ns
-
-#define T0H 350 // Width of a 0 bit in ns
-#define T0L (1250 - T0H) // Width of a 0 bit in ns
-
-// The reset gap can be 6000 ns, but depending on the LED strip it may have to be increased
-// to values like 600000 ns. If it is too small, the pixels will show nothing most of the time.
-#define RES 10000 // Width of the low gap between bits to cause a frame to latch
-
-void sendByte(uint8_t byte) {
- // WS2812 protocol wants most significant bits first
- for (unsigned char bit = 0; bit < 8; bit++) {
- bool is_one = byte & (1 << (7 - bit));
- // using something like wait_ns(is_one ? T1L : T0L) here throws off timings
- if (is_one) {
- // 1
- writePinHigh(RGB_DI_PIN);
- wait_ns(T1H);
- writePinLow(RGB_DI_PIN);
- wait_ns(T1L);
- } else {
- // 0
- writePinHigh(RGB_DI_PIN);
- wait_ns(T0H);
- writePinLow(RGB_DI_PIN);
- wait_ns(T0L);
- }
- }
-}
-
-void ws2812_init(void) { setPinOutput(RGB_DI_PIN); }
-
-// Setleds for standard RGB
-void ws2812_setleds(LED_TYPE *ledarray, uint16_t leds) {
- static bool s_init = false;
- if (!s_init) {
- ws2812_init();
- s_init = true;
- }
-
- // this code is very time dependent, so we need to disable interrupts
- chSysLock();
-
- for (uint8_t i = 0; i < leds; i++) {
- // WS2812 protocol dictates grb order
- sendByte(ledarray[i].g);
- sendByte(ledarray[i].r);
- sendByte(ledarray[i].b);
-#ifdef RGBW
- sendByte(ledarray[i].w);
-#endif
- }
-
- wait_ns(RES);
-
- chSysUnlock();
-}