Diff: LEDTape.cpp

Revision:

0:49551c775fc5

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/LEDTape.cpp	Thu Jan 17 13:49:36 2013 +0000
@@ -0,0 +1,83 @@
+/*
+ * UCS1903 tape led IC
+ */
+#include "mbed.h"
+#include "LEDTape.h"
+
+SPI tape(p11, p12, p13);
+
+//#define tape_write(d) tape.write(d)
+#ifndef tape_write
+#if defined(TARGET_LPC1768) || defined(TARGET_LPC2368)
+void tape_write (int d) {
+    while (! (LPC_SSP0->SR & (1<<1))); // TNF
+    LPC_SSP0->DR = d;
+}
+#elif defined(TARGET_LPC11U24)
+void tape_write (int d) {
+    while (! (LPC_SSP1->SR & (1<<1))); // TNF
+    LPC_SSP1->DR = d;
+}
+#endif
+#endif
+
+void tapeReset (int flag) {
+    int i;
+
+    __disable_irq();
+#if defined(TARGET_LPC1768) || defined(TARGET_LPC2368)
+    if (flag) {
+        while ((LPC_SSP0->SR & ((1<<4)|(1<<0))) != (1<<0)); // BSY, TFE
+        LPC_PINCON->PINSEL1 &= ~(0x03<<4);  // GPIO
+        LPC_GPIO0->FIODIR0 |= (1<<18);
+        LPC_GPIO0->FIOSET0 = (1<<18);
+    } else {
+        for (i = 0; i < 4; i ++) {
+            tape_write(0x1f);
+        }
+        LPC_PINCON->PINSEL1 &= ~(0x03<<4);
+        LPC_PINCON->PINSEL1 |= (0x02<<4);  // SSP MOSI
+    }
+#elif defined(TARGET_LPC11U24)
+    if (flag) {
+        while ((LPC_SSP1->SR & ((1<<4)|(1<<0))) != (1<<0)); // BSY, TFE
+        LPC_IOCON->PIO1_22 &= ~0x07;    // GPIO
+        LPC_GPIO->DIR[1] |= (1<<22);
+        LPC_GPIO->SET[1] |= (1<<22);
+    } else {
+        for (i = 0; i < 4; i ++) {
+            tape_write(0x1f);
+        }
+        LPC_IOCON->PIO1_22 &= ~0x07;    
+        LPC_IOCON->PIO1_22 |= 0x02;     // SSP MOSI
+    }
+#endif
+    __enable_irq();
+}
+
+void tapeSend (int dat) {
+    int b;
+
+    __disable_irq();
+    for (b = 0x800000; b; b = b >> 1) {
+        if (dat & b) {
+            // 1
+            tape_write(0x01);
+        } else {
+            // 0
+            tape_write(0x0f);
+        }
+    }
+    __enable_irq();
+}
+
+void tapeInit (int freq) {
+    tape.format(5, 1);
+    if (freq) {
+        tape.frequency(freq * 1000);
+    } else {
+        // high speed (800kbps)
+        tape.frequency(4000000);
+    }
+    tapeReset(1);
+}