Diff: LAN925X_SPI.cpp

Revision:

0:3516fed95f0b

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/LAN925X_SPI.cpp	Mon Jan 18 03:46:20 2021 +0000
@@ -0,0 +1,81 @@
+#include "LAN925X_SPI.h"
+#include <stdint.h>
+
+#include "mbed.h"
+//********************************************************************//
+// HardWare Interface
+//********************************************************************//
+
+#define     SPI_CS_LOW()    cs = 0;
+#define     SPI_CS_HIGH()   cs = 1;
+
+SPI spi(PA_7, PA_6, PA_5); // mosi, miso, sclk
+DigitalOut cs(PB_6);
+
+void LAN925X_SPI_Init(void)
+{   
+   SPI_CS_HIGH();
+    // Setup the spi for 8 bit data, high steady state clock,
+    // second edge capture, with a 1MHz clock rate
+    spi.format(8,3);
+    spi.frequency(20000000);
+}
+uint8_t SPI_8bit_Read(void)
+{
+    return spi.write(0x00);
+}
+void SPI_8bit_Write(uint8_t wdata)
+{
+    spi.write(wdata);
+}
+
+void SQI_RESET(void)
+{
+    //SS2_SetDigitalInput();
+    //while(SS2_GetValue()!=1);
+    SPI_CS_HIGH();
+    SPI_CS_HIGH();
+    SPI_CS_HIGH();
+    SPI_CS_HIGH();
+    SPI_CS_HIGH();
+    SPI_CS_HIGH();
+    SPI_CS_HIGH();
+    SPI_CS_HIGH();
+    SPI_CS_LOW();
+    SPI_8bit_Write(0xFF);
+    SPI_CS_HIGH();
+}
+
+
+
+
+uint32_t LAN925X_SPI_READ(uint16_t addr)
+{
+    uint32_t rdata;
+    SPI_CS_LOW();
+    SPI_8bit_Write(0x03); //Instruction
+    SPI_8bit_Write( 0xFF&(addr>>8) ); //Address
+    SPI_8bit_Write( 0xFF&(addr>>0) ); //Address
+    rdata =  (uint32_t)SPI_8bit_Read();
+    rdata |= (uint32_t)SPI_8bit_Read()<<8;
+    rdata |= (uint32_t)SPI_8bit_Read()<<16;
+    rdata |= (uint32_t)SPI_8bit_Read()<<24;
+    SPI_CS_HIGH();
+    return rdata;
+}
+
+uint32_t LAN925X_SPI_WRITE(uint16_t addr,uint32_t data)
+{
+    uint32_t rdata;
+    SPI_CS_LOW();
+    SPI_8bit_Write(0x02); //Instruction
+    SPI_8bit_Write( 0xFF&(addr>>8) ); //Address
+    SPI_8bit_Write( 0xFF&(addr>>0) ); //Address
+    SPI_8bit_Write( 0xFF&(data>>0) );
+    SPI_8bit_Write( 0xFF&(data>>8) );
+    SPI_8bit_Write( 0xFF&(data>>16) );
+    SPI_8bit_Write( 0xFF&(data>>24) );
+    SPI_CS_HIGH();
+    return rdata;
+}
+