Darren Ulrich / UniGraphic

Added SPI burst mode to spi 8 bit.

Dependents:   Bicycl_Computer_NUCLEO-F411RE Bicycl_Computer_NUCLEO-L476RG

Fork of UniGraphic by GraphicsDisplay

Added SPI burst mode to this graphics driver. If whoever wants this rolled in to repository let me know. I replaced _spi.write(); with fastWrite(); and clearRX();

SPI8.cpp

// need to re-create SPI firmware to access SPI handle
static SPI_HandleTypeDef SpiHandle;

void SPI8::fastWrite(int data) {
    
      SpiHandle.Instance = SPI1;
    // Check if data is transmitted
    while ((SpiHandle.Instance->SR & SPI_SR_TXE) == 0);
    SpiHandle.Instance->DR = data;
}
    
void SPI8::clearRX( void ) {
        SpiHandle.Instance = SPI1;
    //Check if the RX buffer is busy
    //While busy, keep checking
    while (SpiHandle.Instance->SR & SPI_SR_BSY){   
        // Check RX buffer readable
        while ((SpiHandle.Instance->SR & SPI_SR_RXNE) == 0);
        int dummy = SpiHandle.Instance->DR;
    }
}

Diff: Protocols/PAR8.cpp

Revision:
0:75ec1b3cde17
Child:
1:ff019d22b275
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Protocols/PAR8.cpp	Thu Feb 12 22:22:47 2015 +0000
@@ -0,0 +1,109 @@
+#include "PAR8.h"
+
+PAR8::PAR8(PortName port, PinName CS, PinName reset, PinName DC, PinName WR, PinName RD)
+    : _port(port,0xFF), _CS(CS), _reset(reset), _DC(DC), _WR(WR), _RD(RD)
+{
+    _reset = 1;
+    _DC=1;
+    _WR=1;
+    _RD=1;
+    _CS=1;
+#ifdef STMPORTDEBUG
+    findport(port); //on return, GPIO get disabled
+#endif
+    _port.mode(PullNone);
+    _port.output(); // will re-enable our GPIO port
+    hw_reset();    
+}
+
+#ifdef STMPORTDEBUG
+// create a port obj with STM HAL drivers, just to collect memorymapped regs
+void PAR8::findport(PortName port)
+{
+    port_t tempport;
+    port_init(&tempport, port, 0xFF, PIN_INPUT);
+    outreg = tempport.reg_out;
+    inreg = tempport.reg_in;
+ //   debug("out 0x%.8X  in 0x%.8X\r\n", outreg, inreg);
+}
+#endif
+void PAR8::wr_cmd(unsigned char cmd)
+{   
+#ifdef USE_CS
+    _CS = 0;
+#endif    
+    _DC = 0; // 0=cmd
+    _WR=0;
+    _port.write(cmd);      // write 8bit
+    _WR=1;
+#ifdef USE_CS
+    _CS = 1;
+#endif
+}
+void PAR8::wr_data8(unsigned char data8)
+{
+#ifdef USE_CS
+    _CS = 0;
+#endif
+    _DC = 1; // 1=data
+    _WR=0;
+    _port.write(data8);    // write 8bit
+    _WR=1;
+#ifdef USE_CS
+    _CS = 1;
+#endif
+}
+void PAR8::wr_data8(unsigned char data8, unsigned int count)
+{
+#ifdef USE_CS
+    _CS = 0;
+#endif
+    _DC = 1; // 1=data
+    _port.write(data8);    // write 8bit
+    while(count)
+    {
+        _WR=0;
+  //      _WR=0;
+        _WR=1;
+        count--;
+    }
+#ifdef USE_CS
+    _CS = 1;
+#endif
+}
+void PAR8::wr_data8buf(unsigned char* data8, unsigned int lenght)
+{
+#ifdef USE_CS
+    _CS = 0;
+#endif
+    _DC = 1; // 1=data
+    while(lenght)
+    {
+        _WR=0;
+        _port.write(*data8++);    // write 8bit
+        _WR=1;
+        lenght--;
+    }
+#ifdef USE_CS
+    _CS = 1;
+#endif
+}
+void PAR8::hw_reset()
+{
+    wait_ms(15);
+    _DC = 1;
+    _CS = 1;
+    _WR = 1;
+    _RD = 1;
+    _reset = 0;                        // display reset
+    wait_us(50);
+    _reset = 1;                       // end reset
+    wait_ms(15);
+#ifndef USE_CS
+    _CS=0;      // put CS low now and forever
+#endif
+}
+void PAR8::BusEnable(bool enable)
+{
+    _CS = enable ? 0:1;
+}
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