Diff: Protocols/BUS16.cpp

Revision:

21:ae0a4eedfc90

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Protocols/BUS16.cpp	Tue Mar 31 21:14:48 2015 +0000
@@ -0,0 +1,227 @@
+ /* mbed UniGraphic library - BUS16 protocol class
+ * Copyright (c) 2015 Giuliano Dianda
+ * Released under the MIT License: http://mbed.org/license/mit
+ *
+ * Derived work of:
+ *
+ * mbed library for 240*320 pixel display TFT based on ILI9341 LCD Controller
+ * Copyright (c) 2013 Peter Drescher - DC2PD
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+#include "BUS16.h"
+
+BUS16::BUS16(PinName* buspins, PinName CS, PinName reset, PinName DC, PinName WR, PinName RD)
+    : _bus(buspins), _CS(CS), _reset(reset), _DC(DC), _WR(WR), _RD(RD)
+{
+    _reset = 1;
+    _DC=1;
+    _WR=1;
+    _RD=1;
+    _CS=1;
+    _bus.mode(PullNone);
+    _bus.output(); // will re-enable our GPIO port
+    hw_reset();    
+}
+
+void BUS16::wr_cmd8(unsigned char cmd)
+{      
+    _DC = 0; // 0=cmd
+    _bus.write(cmd);      // write 8bit
+    _WR=0;
+    _WR=1;
+    _DC = 1; // 1=data next
+}
+void BUS16::wr_data8(unsigned char data)
+{
+    _bus.write(data);    // write 8bit
+    _WR=0;
+    _WR=1;
+}
+void BUS16::wr_cmd16(unsigned short cmd)
+{    
+    _DC = 0; // 0=cmd
+    _bus.write(cmd>>8);      // write 8bit
+    _WR=0;
+    _WR=1;
+    _bus.write(cmd&0xFF);      // write 8bit
+    _WR=0;
+    _WR=1;
+    _DC = 1; // 1=data next
+}
+void BUS16::wr_data16(unsigned short data)
+{
+    _bus.write(data>>8);    // write 8bit
+    _WR=0;
+    _WR=1;
+    _bus.write(data&0xFF);    // write 8bit
+    _WR=0;
+    _WR=1;
+}
+void BUS16::wr_gram(unsigned short data)
+{
+    _bus.write(data);    // write 16bit
+    _WR=0;
+    _WR=1;
+}
+void BUS16::wr_gram(unsigned short data, unsigned int count)
+{
+    while(count)
+    {
+        _bus.write(data);    // rewrite even if same data, otherwise too much fast
+        _WR=0;
+        _WR=1;
+        count--;
+    }
+}
+void BUS16::wr_grambuf(unsigned short* data, unsigned int lenght)
+{
+    while(lenght)
+    {
+        _bus.write(*data);    // write 16bit
+        _WR=0;
+        _WR=1;
+        data++;
+        lenght--;
+    }
+}
+unsigned short BUS16::rd_gram(bool convert)
+{
+    unsigned int r=0;
+   _bus.input();
+   
+    _RD = 0;
+    _bus.read(); //dummy read
+    _RD = 1;
+    
+    _RD = 0;
+  //  _RD = 0; // add wait
+    r |= _bus.read();
+    _RD = 1;
+    if(convert)
+    {
+        r <<= 8;
+        _RD = 0;
+  //      _RD = 0; // add wait
+        r |= _bus.read()>>8; //MSB of port read is blue, LSB is red of next pixel
+        _RD = 1;
+        // gram is 18bit/pixel, if you set 16bit/pixel (cmd 3A), during writing the 16bits are expanded to 18bit
+        // during reading, you read the raw 18bit gram
+        r = RGB24to16((r&0xFF0000)>>16, (r&0xFF00)>>8, r&0xFF);// 18bit pixel padded to 24bits, rrrrrr00_gggggg00_bbbbbb00, converted to 16bit
+    }
+    _bus.output();
+    return (unsigned short)r;
+}
+unsigned int BUS16::rd_reg_data32(unsigned char reg)
+{
+    wr_cmd8(reg);
+    unsigned int r=0;
+  //  _DC = 1; // 1=data
+   _bus.input();
+   
+    _RD = 0;
+    _bus.read(); //dummy read
+    _RD = 1;
+    
+    _RD = 0;
+//    _RD = 0; // add wait
+    r |= (_bus.read()&0xFF);
+    r <<= 8;
+    _RD = 1;
+    
+    _RD = 0;
+//    _RD = 0; // add wait
+    r |= (_bus.read()&0xFF);
+    r <<= 8;
+    _RD = 1;
+    
+    _RD = 0;
+//    _RD = 0; // add wait
+    r |= (_bus.read()&0xFF);
+    r <<= 8;
+    _RD = 1;
+    
+    _RD = 0;
+//    _RD = 0; // add wait
+    r |= (_bus.read()&0xFF);
+    _RD = 1;
+    
+    _CS = 1; // toggle CS to interupt the cmd in case was not supported
+    _CS = 0;
+
+    _bus.output();
+    return r;
+}
+// in Par mode EXTC regs (0xB0-0xFF) can be directly read
+unsigned int BUS16::rd_extcreg_data32(unsigned char reg, unsigned char SPIreadenablecmd)
+{
+    return rd_reg_data32(reg);
+}
+// ILI932x specific
+void BUS16::dummyread()
+{
+    _bus.input();
+    _RD = 0;
+    _bus.read();    // dummy read
+    _RD=1;
+ //   _bus.output();
+}
+// ILI932x specific
+void BUS16::reg_select(unsigned char reg, bool forread)
+{    
+    _DC = 0;
+    _bus.write(reg);    // write 16bit
+    _WR=0;
+    _WR=1;
+    _DC = 1; // 1=data next
+}
+// ILI932x specific
+void BUS16::reg_write(unsigned char reg, unsigned short data)
+{
+    _DC = 0;
+    _bus.write(reg);    // write 16bit
+    _WR=0;
+    _WR=1;
+    _DC = 1;
+    _bus.write(data);    // write 16bit
+    _WR=0;
+    _WR=1;
+}
+// ILI932x specific
+unsigned short BUS16::reg_read(unsigned char reg)
+{
+    unsigned short r=0;
+    _DC = 0;
+    _bus.write(reg);    // write 16bit
+    _WR=0;
+    _WR=1;
+    _DC = 1;
+    _bus.input();
+    _RD=0;
+    r |= _bus.read();    // read 16bit
+    _RD=1;
+    _bus.output();
+    return r;
+}
+void BUS16::hw_reset()
+{
+    wait_ms(15);
+    _DC = 1;
+    _CS = 1;
+    _WR = 1;
+    _RD = 1;
+    _reset = 0;                        // display reset
+    wait_ms(2);
+    _reset = 1;                       // end reset
+    wait_ms(100);
+}
+void BUS16::BusEnable(bool enable)
+{
+    _CS = enable ? 0:1;
+}
\ No newline at end of file