John RDL
Eventual attempt at porting the efficient WS2812 library to mbed
Dependencies: hubmartin-ws2812b mbed-dev
Revision 0:7e789cd95883, committed 2017-02-13
- Comitter:
- jlargentaye
- Date:
- Mon Feb 13 02:47:25 2017 +0000
- Commit message:
- Functional in mbed (except GPIO monitoring, LED BLUE and ORANGE)
Changed in this revision
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/hubmartin-ws2812b.lib Mon Feb 13 02:47:25 2017 +0000 @@ -0,0 +1,1 @@ +https://developer.mbed.org/users/jlargentaye/code/hubmartin-ws2812b/#632ace3999f1
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp Mon Feb 13 02:47:25 2017 +0000
@@ -0,0 +1,78 @@
+#include "mbed.h"
+#include "ws2812b.h"
+
+#define ARRAY_SIZE(x) (sizeof(x)/sizeof((x)[0]))
+
+int poke_leds (DigitalOut *leds, int num_leds, float delay)
+{
+ // 000 001 011 010 110 111 101 100
+ const uint8_t gray3[] = {0, 1, 3, 2, 6, 7, 5, 4};
+ const size_t sz = ARRAY_SIZE(gray3);
+ static size_t gray_idx;
+
+ for (int i = 0; i < num_leds; i++) {
+ leds[i] = (gray3[gray_idx] >> i) & 1;
+ }
+ wait(delay);
+
+ int ret = gray3[gray_idx++];
+ gray_idx %= sz;
+
+ return ret;
+}
+
+#define RAM_BASE 0x20000000
+#define RAM_BB_BASE 0x22000000
+#define Var_ResetBit_BB(VarAddr, BitNumber) (*(volatile uint32_t *) (RAM_BB_BASE | ((VarAddr - RAM_BASE) << 5) | ((BitNumber) << 2)) = 0)
+#define Var_SetBit_BB(VarAddr, BitNumber) (*(volatile uint32_t *) (RAM_BB_BASE | ((VarAddr - RAM_BASE) << 5) | ((BitNumber) << 2)) = 1)
+#define Var_GetBit_BB(VarAddr, BitNumber) (*(volatile uint32_t *) (RAM_BB_BASE | ((VarAddr - RAM_BASE) << 5) | ((BitNumber) << 2)))
+#define BITBAND_SRAM(address, bit) ( (__IO uint32_t *) (RAM_BB_BASE + (((uint32_t)address) - RAM_BASE) * 32 + (bit) * 4))
+
+#define varSetBit(var,bit) (Var_SetBit_BB((uint32_t)&var,bit))
+#define varResetBit(var,bit) (Var_ResetBit_BB((uint32_t)&var,bit))
+#define varGetBit(var,bit) (Var_GetBit_BB((uint32_t)&var,bit))
+
+DigitalOut Orange(PD_12);
+extern "C" void toggle_orange (void)
+{
+ Orange = !Orange;
+}
+
+DigitalOut Blue(PD_13);
+extern "C" void toggle_blue (void)
+{
+ Blue = !Blue;
+}
+
+Serial pc(USBTX, USBRX);
+extern "C" void trace (char* str)
+{
+ pc.printf(str);
+}
+
+int main() {
+
+
+ DigitalOut leds[] = {LED1, LED2, LED3};
+ DigitalOut trig(PD_7);
+
+ trig = 1;
+ pc.printf("derp.\r\n");
+ ws2812b_init();
+ trig = 0;
+ poke_leds(leds, 3, 0.01);
+ ws2812b_set_pixel(0, 1, 64, 128, 196);
+ poke_leds(leds, 3, 0.01);
+ while(1) {
+ trig = 1;
+ wait(0.1);
+ if(ws2812b.transferComplete) {
+ poke_leds(leds, 3, 0.01);
+ // Signal that buffer is changed and transfer new data
+ ws2812b.startTransfer = 1;
+ ws2812b_handle();
+ }
+ poke_leds(leds, 3, 0.01);
+ trig = 0;
+ }
+}
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed-dev.lib Mon Feb 13 02:47:25 2017 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/mbed_official/code/mbed-dev/#ff67d9f36b67