Diff: LEDTape_HL1606.cpp

Revision:

0:6fc9fe87e0c5

diff -r 000000000000 -r 6fc9fe87e0c5 LEDTape_HL1606.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/LEDTape_HL1606.cpp	Mon Jul 08 01:36:53 2013 +0000
@@ -0,0 +1,124 @@
+/*
+ * HL1606 tape led IC
+ */
+#include "mbed.h"
+#include "LEDTape.h"
+
+#define PWM_STEP 64
+
+SPI tape(p11, p12, p13);
+DigitalOut latch(p14);
+
+#if defined(TARGET_LPC1768) || defined(TARGET_LPC2368)
+    LPC_SSP_TypeDef *_ssp = LPC_SSP0;
+#elif defined(TARGET_LPC11U24)
+    LPC_SSPx_Type *_ssp = LPC_SSP1;
+#endif
+
+int num = 160;
+int *data;
+
+
+//#define tape_write(d) tape.write(d)
+#ifndef tape_write
+void tape_write (int d) {
+    while (! (_ssp->SR & (1<<1))); // TNF
+    _ssp->DR = d;
+}
+#endif
+
+extern "C"
+#if defined(TARGET_LPC1768) || defined(TARGET_LPC2368)
+void SSP0_IRQHandler() {
+#elif defined(TARGET_LPC11U24)
+void SSP1_IRQHandler() {
+#endif
+    static int addr = num - 1;
+    static int pwm = 0;
+    int d, dr, r, g, b;
+repeat:
+    // led data
+    while (_ssp->SR & (1<<1)) { // TNF
+        d = data[addr];
+        r = (d >> 16) & 0xff;
+        g = (d >> 8) & 0xff;
+        b = d & 0xff;
+
+        dr = 0x80;
+#ifdef PWM_STEP
+        if (r > pwm || r == 0xff) {
+            dr |= 0x04;
+        }
+        if (g > pwm || g == 0xff) {
+            dr |= 0x10;
+        }
+        if (b > pwm || b == 0xff) {
+            dr |= 0x01;
+        }
+#else
+        if (r) {
+            dr |= 0x04;
+        }
+        if (g) {
+            dr |= 0x10;
+        }
+        if (b) {
+            dr |= 0x01;
+        }
+#endif
+        _ssp->DR = dr;
+
+        addr --;
+        if (addr < 0) {
+            addr = num - 1;
+#ifdef PWM_STEP
+            pwm += PWM_STEP;
+            if (pwm > 255) {
+                pwm = 0;
+            }
+#endif
+            while ((_ssp->SR & ((1<<4)|(1<<0))) != (1<<0)); // BSY, TFE
+            latch = 1;
+            wait_us(10);
+            latch = 0;
+            goto repeat;
+        }
+    }
+}
+
+void tapeInit (int freq, int n) {
+
+    num = n;
+    data = new int(num);
+    for (int i = 0; i < num; i ++) {
+        data[i] = 0;
+    }
+
+    tape.format(8, 0);
+    latch = 0;
+    if (freq) {
+        tape.frequency(freq * 1000);
+    } else {
+        // 450KHz, higher speed = draw errors
+        tape.frequency(450000);
+    }
+#if defined(TARGET_LPC1768) || defined(TARGET_LPC2368)
+    NVIC_SetVector(SSP0_IRQn, (uint32_t)SSP0_IRQHandler);
+    NVIC_SetPriority(SSP0_IRQn, 0);
+    NVIC_EnableIRQ(SSP0_IRQn);
+#elif defined(TARGET_LPC11U24)
+    NVIC_SetVector(SSP1_IRQn, (uint32_t)SSP1_IRQHandler);
+    NVIC_SetPriority(SSP1_IRQn, 0);
+    NVIC_EnableIRQ(SSP1_IRQn);
+#endif
+    _ssp->IMSC |= (1<<3); // TXIM
+}
+
+void tapeSet (int n, int dat) {
+    if (n < num) {
+        data[n] = dat;
+    }
+}
+
+void tapeSend () {
+}