Stepan Smejkal
.
Diff: Protocols/BUS16.cpp
- Revision:
- 21:ae0a4eedfc90
diff -r 14daa48ffd4c -r ae0a4eedfc90 Protocols/BUS16.cpp
--- /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;
+}
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