Diff: main.cpp

Revision:

0:49512863ec9b

Child:

2:d50445fa62da

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Thu Dec 01 01:58:40 2016 +0000
@@ -0,0 +1,156 @@
+/*
+ * Suga-koubou Graphic Poi Kit
+ *   LPC11U35 (select EA LPC11U35 QuickStart Board)
+ *   APA102 (Adafruit DotStar LED Strip)
+ */
+#include "mbed.h"
+#include "file.h"
+
+#define LED_NUM     32
+#define LED_GLOBAL  31 // brightness 0-31
+#define LED_FREQ    500000 // spi
+#define LED_WAIT    1 // *10ms
+
+#if defined(TARGET_LPC11U24)
+Serial pc(USBTX, USBRX);
+DigitalIn usb_vbus(p30);
+#else
+DigitalIn usb_vbus(P0_3);
+#endif
+DigitalOut led(LED1);
+DigitalIn button(P0_1);
+SPI spi(P0_21, P0_22, P1_15);
+
+void dotsStar (int *buf, int num) {
+    int i;
+
+    // start frame
+    for (i = 0; i < 4; i ++) {
+        spi.write(0);
+    }
+    // led frame
+    for (i = 0; i < num; i ++) {
+        spi.write((7<<5) | LED_GLOBAL);
+        spi.write((buf[i] >> 16) & 0xff); // B
+        spi.write((buf[i] >> 8) & 0xff); // G
+        spi.write(buf[i] & 0xff); // R
+    }
+    // end frame
+    for (i = 0; i < 4; i ++) {
+        spi.write(1);
+    }
+}
+
+void dotsStar_off () {
+    int i;
+
+    for (i = 0; i < 4; i ++) {
+        spi.write(0);
+    }
+    for (i = 0; i < LED_NUM * 4; i ++) {
+        spi.write(0);
+    }
+    for (i = 0; i < 4; i ++) {
+        spi.write(1);
+    }
+}
+
+void work () {
+    int i, a, x, y;
+    int led_buf[LED_NUM];
+    int num = 0;
+    char *buf = getPicture(num);
+    struct BmpHeader *header = (struct BmpHeader *)buf;
+
+    if (buf == NULL) return;
+    DBG(" %d: %08x\r\n", num, buf);
+    y = 0;
+    a = 0;
+    for (;;) {
+        for (x = 0; x < header->width; x ++) {
+          if (x < LED_NUM) {
+            led_buf[x] = (header->data[a] << 16) | (header->data[a + 1] << 8) | header->data[a + 2];
+          }
+          a += 3;
+        }
+        DBG("%d %d %d/%d\r\n", a, y, header->width, header->height);
+        dotsStar(led_buf, header->width < LED_NUM ? header->width : LED_NUM);
+        y ++;
+        if (y >= header->height) {
+            y = 0;
+            a = 0;
+            led = 0;
+        }
+
+        for (i = 0; i < LED_WAIT; i ++) {
+            if (button == 0) {
+                led = 1;
+next:
+                num ++;
+                if (num >= MAX_SECTOR) {
+                    num = 0;
+                }
+                buf = getPicture(num);
+                if (buf == NULL) goto next;
+                header = (struct BmpHeader *)buf;
+                DBG(" %d: %08x\r\n", num, buf);
+                while (button == 0);
+            }
+            wait_ms(1);
+        }
+    }
+}
+
+void demo () {
+    int i, c;
+    int color = 7;
+    int led_buf[LED_NUM];
+
+    for (;;) {
+        for (i = 0; i < LED_NUM; i ++) {
+            c = ((i + color) % 7) + 1;
+            led_buf[i] = (c & 4 ? 0xff0000 : 0) | (c & 2 ? 0xff00 : 0) | (c & 1 ? 0xff : 0);
+        }
+        dotsStar(led_buf, LED_NUM);
+        led = !led;
+
+        wait_ms(500);
+        color --;
+        if (color <= 0) color = 7;
+    }
+}
+
+int main() {
+
+    LPC_SYSCON->BODCTRL = 0x12; // BOD Reset 2.4V
+
+    button.mode(PullUp);
+    usb_vbus.mode(PullDown);
+#if defined(TARGET_LPC11U24)
+    pc.baud(115200);
+#endif
+    DBG("*** MSD\r\n");
+
+    wait_ms(10);
+    spi.frequency(LED_FREQ);
+    dotsStar_off();
+
+    if (usb_vbus) {
+        DBG("usb\r\n");
+        workMsd();
+    }
+
+    DBG("work\r\n");
+    work();
+
+    // demo
+    DBG("demo\r\n");
+    demo();
+}
+
+extern "C" void HardFault_Handler() {
+    for (;;) {
+        led = !led;
+        for (volatile int w = 0; w < 1000000; w ++);
+    }
+}