Merge pull request #138 from ytsuboi/master

[LPC812] Add SPISlave function

Author: bogdanm

libraries/mbed/targets/hal/TARGET_NXP/TARGET_LPC81X/device.h

@@ -32,7 +32,7 @@
 #define DEVICE_I2CSLAVE         0
 
 #define DEVICE_SPI              1
-#define DEVICE_SPISLAVE         0
+#define DEVICE_SPISLAVE         1
 
 #define DEVICE_CAN              0
 

libraries/mbed/targets/hal/TARGET_NXP/TARGET_LPC81X/spi_api.c

@@ -183,9 +183,9 @@ static inline int ssp_read(spi_t *obj) {
 }
 
 static inline int ssp_busy(spi_t *obj) {
-    // TODO
-    return 0;
-}
+    // checking RXOV(Receiver Overrun interrupt flag)
+    return obj->spi->STAT & (1 << 2);
+    }
 
 int spi_master_write(spi_t *obj, int value) {
     ssp_write(obj, value);

libraries/tests/mbed/spi_slave/main.cpp

@@ -2,6 +2,10 @@
 
 #if defined(TARGET_KL25Z)
 SPISlave device(PTD2, PTD3, PTD1, PTD0);    // mosi, miso, sclk, ssel
+
+#elif defined(TARGET_LPC812)
+SPISlave device(P0_14, P0_15, P0_12, P0_13);    // mosi, miso, sclk, ssel
+
 #else
 SPISlave device(p5, p6, p7, p8);            // mosi, miso, sclk, ssel
 #endif