NUCLEO R030R8 16Bit SPI read and write

add 16 bit read and write

Author: dreschpe

libraries/mbed/targets/hal/TARGET_STM/TARGET_NUCLEO_F030R8/spi_api.c

@@ -215,13 +215,19 @@ static inline int ssp_writeable(spi_t *obj) {
 static inline void ssp_write(spi_t *obj, int value) {
     SPI_TypeDef *spi = (SPI_TypeDef *)(obj->spi);  
     while (!ssp_writeable(obj));
-    SPI_SendData8(spi, (uint8_t)value);
+    if(obj->bits == SPI_DATASIZE_8BIT)  // 8 bit mode
+    	SPI_SendData8(spi, (uint8_t)value);
+    else
+    	SPI_I2S_SendData16(spi, (uint16_t)value);
 }
 
 static inline int ssp_read(spi_t *obj) {
     SPI_TypeDef *spi = (SPI_TypeDef *)(obj->spi);   
     while (!ssp_readable(obj));
-    return (int)SPI_ReceiveData8(spi);
+    if(obj->bits == SPI_DATASIZE_8BIT)  // 8 bit mode
+    	return (int)SPI_ReceiveData8(spi);
+    else 								// 16 bit mode
+    	return (int)SPI_I2S_ReceiveData16(spi); 
 }
 
 static inline int ssp_busy(spi_t *obj) {
@@ -242,13 +248,19 @@ int spi_slave_receive(spi_t *obj) {
 
 int spi_slave_read(spi_t *obj) {
     SPI_TypeDef *spi = (SPI_TypeDef *)(obj->spi);
-    return (int)SPI_ReceiveData8(spi);
+    if(obj->bits == SPI_DATASIZE_8BIT)  // 8 bit mode
+    	return (int)SPI_ReceiveData8(spi);
+    else 
+    	return (int)SPI_I2S_ReceiveData16(spi); 
 }
 
 void spi_slave_write(spi_t *obj, int value) {
     SPI_TypeDef *spi = (SPI_TypeDef *)(obj->spi);  
-    while (!ssp_writeable(obj));  
-    SPI_SendData8(spi, (uint8_t)value);
+    while (!ssp_writeable(obj)); 
+    if(obj->bits == SPI_DATASIZE_8BIT)  // 8 bit mode
+    	SPI_SendData8(spi, (uint8_t)value);
+    else 
+    	SPI_I2S_SendData16(spi, (uint16_t)value);
 }
 
 int spi_busy(spi_t *obj) {