sw: enable fancy led effects

Support different LED patterns depending on the mode.

Signed-off-by: Sean Cross <sean@xobs.io>

sw/include/rgb.h

@@ -2,5 +2,9 @@
 #define _RGB_H_
 
 void rgb_init(void);
+void rgb_mode_idle(void);
+void rgb_mode_done(void);
+void rgb_mode_writing(void);
+void rgb_mode_error(void);
 
 #endif /* _RGB_H_ */

sw/src/dfu.c

@@ -27,6 +27,7 @@
 #include <toboot-api.h>
 #include <toboot-internal.h>
 #include <dfu.h>
+#include <rgb.h>
 
 #define ERASE_SIZE 65536 // Erase block size (in bytes)
 #define WRITE_SIZE 256 // Number of bytes we can write
@@ -54,6 +55,14 @@ static uint32_t dfu_bytes_remaining;
 static uint32_t dfu_target_address;
 
 static void set_state(dfu_state_t new_state, dfu_status_t new_status) {
+    if (new_state == dfuIDLE)
+        rgb_mode_idle();
+    else if (new_status != OK)
+        rgb_mode_error();
+    else if (new_state == dfuMANIFEST_WAIT_RESET)
+        rgb_mode_done();
+    else
+        rgb_mode_writing();
     dfu_state = new_state;
     dfu_status = new_status;
 }
@@ -305,13 +314,13 @@ bool dfu_getstatus(uint8_t status[8])
         case dfuMANIFEST_SYNC:
             // Ready to reboot. The main thread will take care of this. Also let the DFU tool
             // know to leave us alone until this happens.
-            dfu_state = dfuMANIFEST;
+            set_state(dfuMANIFEST, OK);
             dfu_poll_timeout_ms = 10;
             break;
 
         case dfuMANIFEST:
             // Perform the reboot
-            dfu_state = dfuMANIFEST_WAIT_RESET;
+            set_state(dfuMANIFEST_WAIT_RESET, OK);
             dfu_poll_timeout_ms = 1000;
             break;
 

sw/src/rgb.c

@@ -19,6 +19,23 @@ enum led_registers {
 #define BREATHE_MODE_MODULATE (1 << 5)
 #define BREATHE_RATE(x) ((x & 7) << 0)
 
+#define RGB_SWITCH_MODE(x) do { \
+    if (rgb_mode == x) \
+        return; \
+    rgb_mode = x; \
+    /* Toggle LEDD_EXE to force the mode to switch */
+    rgb_ctrl_write(           (1 << 1) | (1 << 2)); \
+    rgb_ctrl_write((1 << 0) | (1 << 1) | (1 << 2)); \
+} while(0)
+
+static enum {
+    INVALID = 0,
+    IDLE,
+    WRITING,
+    ERROR,
+    DONE,
+} rgb_mode;
+
 static void rgb_write(uint8_t value, uint8_t addr) {
     rgb_addr_write(addr);
     rgb_dat_write(value);
@@ -28,11 +45,19 @@ void rgb_init(void) {
     // Turn on the RGB block and current enable, as well as enabling led control
     rgb_ctrl_write((1 << 0) | (1 << 1) | (1 << 2));
 
-    rgb_write((1 << 7) | (1 << 6), LEDDCR0);
+    // Enable the LED driver, and set 250 Hz mode.
+    // Also set quick stop, which we'll use to switch patterns quickly.
+    rgb_write((1 << 7) | (1 << 6) | (1 << 3), LEDDCR0);
 
     // Set clock register to 12 MHz / 64 kHz - 1
     rgb_write((12000000/64000)-1, LEDDBR);
 
+    rgb_mode_idle();
+}
+
+void rgb_mode_idle(void) {
+    RGB_SWITCH_MODE(IDLE);
+    // rgb_mode_writing(); return;
     rgb_write(12, LEDDONR);
     rgb_write(24, LEDDOFR);
 
@@ -43,4 +68,46 @@ void rgb_init(void) {
     rgb_write(0x00/4, LEDDPWRG); // Red
     rgb_write(0x4a/4, LEDDPWRB); // Green
     rgb_write(0xe1/4, LEDDPWRR); // Blue
+}
+
+void rgb_mode_writing(void) {
+    RGB_SWITCH_MODE(WRITING);
+    rgb_write(1, LEDDONR);
+    rgb_write(2, LEDDOFR);
+
+    rgb_write(BREATHE_ENABLE | 0
+            | BREATHE_MODE_MODULATE | BREATHE_RATE(1), LEDDBCRR);
+    rgb_write(BREATHE_ENABLE | BREATHE_MODE_MODULATE | BREATHE_RATE(3), LEDDBCFR);
+
+    rgb_write(0x00/4, LEDDPWRG); // Red
+    rgb_write(0x7a/4, LEDDPWRB); // Green
+    rgb_write(0x51/4, LEDDPWRR); // Blue
+}
+
+void rgb_mode_error(void) {
+    RGB_SWITCH_MODE(ERROR);
+    rgb_write(3, LEDDONR);
+    rgb_write(3, LEDDOFR);
+
+    rgb_write(BREATHE_ENABLE | BREATHE_EDGE_BOTH
+            | BREATHE_MODE_MODULATE | BREATHE_RATE(2), LEDDBCRR);
+    rgb_write(BREATHE_ENABLE | BREATHE_MODE_MODULATE | BREATHE_RATE(3), LEDDBCFR);
+
+    rgb_write(0xf0/4, LEDDPWRG); // Red
+    rgb_write(0x0a/4, LEDDPWRB); // Green
+    rgb_write(0x01/4, LEDDPWRR); // Blue
+}
+
+void rgb_mode_done(void) {
+    RGB_SWITCH_MODE(DONE);
+    rgb_write(8, LEDDONR);
+    rgb_write(8, LEDDOFR);
+
+    rgb_write(BREATHE_ENABLE | BREATHE_EDGE_BOTH
+            | BREATHE_MODE_MODULATE | BREATHE_RATE(2), LEDDBCRR);
+    rgb_write(BREATHE_ENABLE | BREATHE_MODE_MODULATE | BREATHE_RATE(3), LEDDBCFR);
+
+    rgb_write(0x14/4, LEDDPWRG); // Red
+    rgb_write(0xff/4, LEDDPWRB); // Green
+    rgb_write(0x44/4, LEDDPWRR); // Blue
 }