Revision 0:2377890cc77a, committed 2016-09-10

Comitter:

og

Date:

Sat Sep 10 09:55:39 2016 +0000

Commit message:

HT1621(TS119-5, TS174) demo

Changed in this revision

diff -r 000000000000 -r 2377890cc77a HT1621.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/HT1621.cpp	Sat Sep 10 09:55:39 2016 +0000
@@ -0,0 +1,132 @@
+#include "HT1621.h"
+
+#define ADDR_MAX 128
+
+#define TAKE_CS()    _cs = 0
+#define RELEASE_CS() _cs = 1
+
+HT1621::HT1621(
+    PinName data, PinName wr, PinName rd, PinName cs
+    ):
+    _data(data), _wr(wr), _rd(rd), _cs(cs)
+{
+    _data.output();
+    _data = 1;
+    _wr = 1;
+    _rd = 1;
+    _cs = 1;
+    sendCommand(SYS_DIS);
+    wait_ms(500);
+    //if (! testMem())
+    //    return false;
+
+    memset(0, 0, ADDR_MAX);
+    sendCommand(SYS_EN);
+    sendCommand(LCD_ON);
+}
+
+
+inline bool HT1621::testMem()
+{
+    uint8_t test = 10;
+    writeMem(0x5a, test);
+    if (readMem(0x5a) != test)
+        return false;
+    return true;
+}
+
+
+void HT1621::writeBits(uint8_t data, uint8_t cnt)
+{
+    while (cnt) {
+        _wr = 0;
+        uint8_t bitval = (data & (1 << (cnt - 1))) ? 1 : 0;
+        _data = bitval;
+        //wait_ms(1);
+        _wr = 1;
+        cnt--;
+    }
+}
+
+uint8_t HT1621::readBits(uint8_t cnt)
+{
+    uint8_t data = 0;
+    _data.input();
+    while (cnt) {
+        _rd = 0;
+        data += _data << (cnt - 1);
+        //wait_ms(1);
+        _rd= 1;
+        cnt--;
+    }
+    _data.output();
+    return data;
+}
+
+#define COMMAND_MODE 0b100
+void HT1621::sendCommand(uint8_t cmd, bool first /*= true*/, bool last /*= true*/)
+{
+    if (first) {
+        TAKE_CS();
+        writeBits(COMMAND_MODE, 3);
+    }
+    writeBits(cmd, 8);
+    writeBits(0, 1); //Last bit - don't care
+    if (last)
+        RELEASE_CS();
+}
+
+#define WRITE_MODE 0b101
+void HT1621::writeMem(uint8_t address, uint8_t data)
+{
+    TAKE_CS();
+    writeBits(WRITE_MODE, 3);
+    writeBits(address, 6);
+    writeBits(data, 4);
+    RELEASE_CS();
+}
+
+void HT1621::memset(uint8_t address, uint8_t data, uint8_t cnt)
+{
+  TAKE_CS();
+  writeBits(WRITE_MODE, 3);
+  writeBits(address, 6);
+  for (uint8_t i = 0; i < cnt; i++)
+    writeBits(data, 4);
+  RELEASE_CS();
+}
+
+//Write up to 256 values starting from address
+//Note: Data is 8-bit aligned. This is not vary efficient
+void HT1621::write(uint8_t address, uint8_t *data, uint8_t cnt)
+{
+    TAKE_CS();
+    writeBits(WRITE_MODE, 3);
+    writeBits(address, 6);
+    for (uint8_t i = 0; i < cnt; i++)
+        writeBits(data[i], 4);
+    RELEASE_CS();
+}
+
+#define READ_MODE 0b110
+uint8_t HT1621::readMem(uint8_t address)
+{
+    uint8_t data;
+    TAKE_CS();
+    writeBits(READ_MODE, 3);
+    writeBits(address, 6);
+    data = readBits(4);
+    RELEASE_CS();
+    return data;
+}
+
+#define READ_MODE 0b110
+void HT1621::read(uint8_t address, uint8_t *data, uint8_t cnt)
+{
+    TAKE_CS();
+    writeBits(READ_MODE, 3);
+    writeBits(address, 6);
+    for (uint8_t i = 0; i < cnt; i++)
+        data[i] = readBits(4);
+    RELEASE_CS();
+}

diff -r 000000000000 -r 2377890cc77a HT1621.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/HT1621.h	Sat Sep 10 09:55:39 2016 +0000
@@ -0,0 +1,75 @@
+/* HT1621 - Holtek RAM Mapping 32x4 LCD Controller */
+/**
+ * TEST
+ * TS119-3
+ * TS119-5  http://www.aitendo.com/product/5152
+ * TS174    http://www.aitendo.com/product/5153
+ * http://www.holtek.com.tw/documents/10179/a33bf4b4-f0ef-4b77-94e4-3dd5d0c35f16
+ * 
+ * HT1621 Library
+ * https://storage.googleapis.com/google-code-archive-source/v2/code.google.com/wirejungle/source-archive.zip
+ * 
+ * reference
+ * http://jr4pdp.blog.enjoy.jp/myblog/2016/01/lcd-ts174nblpic-da92.html
+ * http://morecatlab.akiba.coocan.jp/lab/index.php/2015/10/segment-lcd/
+*/
+#ifndef MBED_HT1621_H
+#define MBED_HT1621_H
+#include "mbed.h"
+
+class HT1621 {
+public:
+    enum {
+        SYS_DIS   = 0b00000000,
+        SYS_EN    = 0b00000001,
+        LCD_OFF   = 0b00000010,
+        LCD_ON    = 0b00000011,
+        TIMER_DIS = 0b00000100,
+        WDT_DIS   = 0b00000101,
+        TIMER_EN  = 0b00000110,
+        WDT_EN    = 0b00000111,
+        TONE_OFF  = 0b00001000,
+        TONE_ON   = 0b00001001,
+        
+        //Set bias to 1/2 or 1/3 cycle
+        //Set to 2,3 or 4 connected COM lines
+        BIAS_HALF_2_COM  = 0b00100000,
+        BIAS_HALF_3_COM  = 0b00100100,
+        BIAS_HALF_4_COM  = 0b00101000,
+        BIAS_THIRD_2_COM = 0b00100001,
+        BIAS_THIRD_3_COM = 0b00100101,
+        BIAS_THIRD_4_COM = 0b00101001,
+        
+        //Don't use
+        TEST_ON   = 0b11100000,
+        TEST_OFF  = 0b11100011
+    } Commands;
+
+    HT1621(
+        PinName data, PinName wr, PinName rd, PinName cs
+        );
+    ~HT1621(){}
+
+
+    void sendCommand(uint8_t cmd, bool first = true, bool last = true);
+
+    void write(uint8_t address, uint8_t *data, uint8_t cnt);
+    void read(uint8_t address, uint8_t *data, uint8_t cnt);
+
+    void writeMem(uint8_t address, uint8_t data);
+    uint8_t readMem(uint8_t address);
+
+    void memset(uint8_t address, uint8_t data, uint8_t cnt);
+
+private:
+    DigitalInOut _data;
+    DigitalOut _wr, _rd, _cs;
+    void writeBits(uint8_t data, uint8_t cnt);
+    uint8_t readBits(uint8_t cnt);
+
+    inline void initControlBus();
+    inline bool testMem();
+    
+};
+
+#endif //HT1621_H